1-cover letter-director cphd · (1) topography of site before and after landscaping. (2) location...

Ladies and Gentlemen: The attached documents are intended for the use of applicants seeking approval for development in Arlington County. These documents have been compiled to assist you in the preparation of your landscape plan. The preservation of the County's trees and tree canopy coverage has been identified as a top priority by the Arlington County Board and citizens. These documents establish minimum standards and requirements both for landscape plans and installations. The information in these standards is not intended to replace but rather to supplement other applicable ordinances and regulations within the County. Further, the County may require additional site improvements beyond the minimum found in these standards in order to meet its mandate of protecting, preserving and enhancing its trees and tree canopy for future generations. We will continue to review and revise these documents to reflect current technical knowledge and best management practices. I and my staff are available to answer additional questions. By working together, County government, developers, property owners, and citizens can realize the vision of an urban community with secure, attractive residential and commercial neighborhoods. Sincerely, Susan Ingraham Bell Director, CPHD Robert Brosnan, Chief, Planning Division

LANDSCAPE STANDARDS

REVISED JANUARY 2010 • PART 1 – ZONING REGULATIONS • PART 2 – SUPPORTING DOCUMENTS • PART 3 – TREE PLANTING STANDARDS AND DETAILS • PART 4 – REPLACEMENT GUIDELINES • PART 5 – DESIGN GUIDELINES • PART 6 – INVASIVE SPECIES

• PART 7 – FORMS • PART 8 – RECOMMENDED TREES • PART 9 – TREE APPRAISAL POLICY • PART 10 – MISCELLANEOUS DETAILS

These documents are available on Arlington County's website at

http://www.arlingtonva.us/departments/CPHD/planning/docs/CPHDPlanningDocsLandscapeDocs.aspx

Please check this link for updates.

Should you have questions or comments, please contact Stephanie Marsnick, CPHD Planning Division, 703-228-3525.

PART 1 ZONING REGULATIONS

Applicability:

By-right projects Site plan projects

Use permits County/School projects

This is a reproduction of Arlington County Zoning Ordinance Section 32A-Landscaping. This section lists the minimum requirements for all plans. Section 32A.A.3 identifies the seven items that must be shown on all landscape plans. Should any one of these items be missing, the plan will be rejects and returned to the applicant for correction and resubmission. Please check relevant Site Plan Condition for supplemental requirements for specific site plan projects.

SECTION 32A. LANDSCAPING The purpose of this section is to provide landscaping in order to better control and ameliorate problems of air and noise pollution, afford wind protection, help moderate temperature extremes, to increase property values and attract prosperous business activities into the County and to make the County a healthier and more aesthetically pleasing place to live, shop and work. It is the further intent of this section to provide minimum standards for the selection of plant materials to ensure their survival. A. Landscape Plans and Plant Materials. 1. Applicability: All properties requiring site landscaping must submit with the application for a building permit a landscape plan demonstrating compliance with the standards set forth below. 2. Site Landscaping Requirements:

a. Street trees: All properties requiring site landscaping shall include major deciduous trees at the minimum rate of one (1) for every thirty-five (35) feet along any property line abutting public right-of-way. The requirement may be satisfied by planting trees within the public right-of-way at a location to be designated by the Zoning Administrator or, alternatively, such trees shall be planted on-site within the front yard setback.

b. No on-site landscaped area shall be less than five (5) feet wide or eight (8) feet long, except that this provision shall not apply to areas covered by easements for public purposes. (2-11-78)

c. A minimum of twenty-five (25) percent of the landscaped area shall be covered by shrub spread at maturity.

3. Landscape Plan Standards:

a. The landscape plan must show: (1) Topography of site before and after landscaping. (2) Location and size of all existing plant materials. (3) Existing vegetation to be retained. (4) Devices by which existing plant material shall be protected from damage during land alteration or land development activities. All disturbed areas not otherwise treated shall be seeded and/or sodded. (5) Location, type, size, spacing and number of proposed trees, shrubs, and ground covers. (6) Property lines, match lines, easements, limit of contract, building overhangs, paved areas, fences, walls and utilities. (7) A legend, plant list, key, a scale drawn to a minimum of one (1) inch to thirty (30) feet, north arrow and planting detail.

4. Planting Materials Standards:

a. Deciduous trees with an ultimate height of thirty-six (36) feet or greater to be planted shall be a minimum two-inch caliper and ten (10) feet in height at time of planting.

b. Deciduous trees with an ultimate height of thirty-five (35) feet or less to be planted shall be a minimum of one and one-half-inch caliper at the time of planting, and eight (8) feet in height at time of planting.

c. Evergreen trees with an ultimate height of twenty-six (26) feet or greater shall have a minimum height of five (5) feet at time of planting.

d. Evergreen trees with an ultimate height of twenty-five (25) feet or less shall have a Minimum height of two (2) feet at time of planting.

e. Caliper, as used herein, is the diameter in inches of the tree as measured six (6) inches above ground level for trees up to and including those trees measuring four (4) inches in caliper. Trees with a caliper greater than four (4) inches shall be measured twelve (12) inches above ground level.

f. Spreading shrubs, deciduous or evergreen, to be planted shall be a minimum fifteen (15) inches in diameter.

g. Upright shrubs to be planted shall be a minimum of twenty-four (24) inches in height. h. All trees, shrubs, vines or groundcover, shall be living species. No artificial plant material

may be used to fulfill the requirements of this section. i. All plant materials must be:

(1) Normally developed and typically representative of species and/or variety stated. (2) Stock well-branched and healthy. (3) In accordance with the American Association of Nurserymen's American Standard for Nursery Stock.

j. A list of trees and shrubs to be used by developers to plan landscaping in compliance with this subsection shall be available at the office of the Zoning Administrator.

k. Trees that vary from this list may be used subject to the approval of the Zoning Administrator.

5. Maintenance: The owner of the property, or his designated agent, shall be responsible for the proper care and maintenance, and replacement if necessary, of all landscape materials in a healthy and growing condition. B. Additional Landscaping Requirements for Parking Areas, Public and Private. 1. Applicability: The provisions of this subsection shall apply to all parking areas designed for twenty (20) or more spaces except the provision of paragraph B.5.b., which shall be applicable regardless of the number of parking spaces. 2. Landscape Plan Requirement:

a. No parking area of twenty (20) or more spaces shall be constructed or enlarged until a landscape plan for that parking area has been approved by the Zoning Administrator.

b. Landscape plans shall be drawn according to the standards set forth in subsection 32A.A.3. c. Landscape plans shall show dimensions and distances, clearly delineate the existing and

proposed parking spaces, or other vehicular use area, access aisles, driveways, and the location, size and description of all landscape materials.

3. Parking Lot Landscaping Design Criteria:

a. All end islands of parking rows and all areas not otherwise used for ingress, egress, aisles or parking must be landscaped.

b. The interior space of any planting area shall be no less than nine (9) square feet and not narrower than two (2) feet across its center.

c. The primary landscaping materials used in parking lots shall be deciduous trees which are capable of providing shade at maturity. Shrubbery, hedges and other live plant materials are to be used to complement the tree landscaping. Effective use of berms and existing topography is also encouraged as a component of the landscape plan.

d. All interior planting areas shall be protected from vehicle intrusion by a permanent barrier not less than four (4) nor more than eight (8) inches high.

e. In those instances where plant material exists on a parking lot site prior to its development, such landscape material may be used if approved as meeting the landscaping requirements of this subsection.

4. Planting Materials: All plant materials shall conform to the standards set forth in subsection 32A.A.4.

5. Screening Requirements: The following regulations apply in all districts to all uses including motor vehicle sales or storage lots:

a. A landscaped strip a minimum of five (5) feet wide shall be provided where a parking area abuts streets, sidewalks, street right-of-way and alleys separating "C" Districts from "R," "RA," and "S-3A" Districts. Deciduous trees shall be spaced every twenty-five (25) linear feet, to be measured along the property line, in the planting areas with a minimum of three (3) evergreen shrubs, planted on center, which attain a minimum height of three (3) feet at maturity, planted between.

b. Except between abutting "RA" zoned lots or where topography achieves the same effect, any part of a parking area located closer than fifty (50) feet to a side or rear lot line of a lot in an "R" or "RA" District or where such parking extends into an "R" or "RA" District as a permitted transitional use, a minimum of a five-foot wide landscaped strip with a wall or fence shall be required. The wall or fence shall be placed within ten (10) feet of, and generally parallel to, the boundary of the parking area and the "R" or "RA" lots. The landscaped strip may be placed on either side of the wall or fence. Such wall or fence shall consist of durable material so arranged that direct light cannot penetrate the face thereof. Such wall or fence shall have a minimum height of six (6) feet above the finished surface of the area that it bounds, measured at the wheel bumper, where such exists, and of six (6) feet above the ground surface of the side exposed to abutting properties. The height of the wall or fence shall be reduced to four (4) feet when located in the required setback. In parking areas with less than twenty (20) spaces, the five-foot landscaped strip may be deleted; however, in all cases the wall or fence shall be required. (3-4-78)

c. A landscaped strip five (5) feet wide shall be provided where "C" properties abut "R," "RA,"

and "S-3A" properties. d. Planting which is required for screening may be considered as partial or complete fulfillment

of the site landscaping requirement. 6. Maintenance: The owner of the property, or his designated agent, shall be responsible for the proper care and maintenance, and replacement if necessary, of all landscape materials n a healthy and growing condition.

PART 2 SUPPORTING DOCUMENTS

Applicability:



This part provides Arlington County’s standard Landscape Maintenance Management Plan, Planting Notes, and Planting Specifications. The applicant must provide the Arlington County Standards on the plans.

January 2010

LANDSCAPE MAINTENANCE MANAGEMENT PROGRAM

I. GENERAL

A. ALL PLANTING AREAS, INCLUDING LAWNS, BUFFERS, AND PARKING LOTS, SHALL BE PERIODICALLY INSPECTED A MINIMUM OF ONCE PER MONTH, EVERY TWO (2) WEEKS DURING THE GROWING SEASON, OR AFTER EACH MOWING SESSION. A FALL CLEAN-UP SHALL BE PERFORMED EACH YEAR.

B. REMOVE ALL LITTER, DEBRIS AND WEEDS.

C. MAINTAIN A MINIMUM OF A 2-INCH DEPTH OF ORGANIC HARDWOOD MULCH OR EQUAL IN ALL PLANTING BEDS.

II. IRRIGATION

A. AUTOMATIC SPRINKLERS SHALL BE CLEANED OUT AND TURNED OFF IN THE FALL PRIOR TO THE FIRST FROST, AND TESTED WHEN TURNED ON IN THE SPRING.

B. EVALUATE SUCCESS OF IRRGATION SYSTEM AND MODIFY AS NECESSARY. WATER REQUIREMENTS: NEW TURF: KEEP MOIST UNTIL ALL SEED GERMINATES AND BECOMES AN

ESTABLISHED STAND OF TURF.

EXISITING TURF: DURING DRY PERIODS, WATER TWICE A WEEK FOR 20 MINUTES AT A TIME, OR SET IRRIGATION FOR COVERAGE OF 1-2 INCHES OF WATER PER WEEK.

III. SEASONAL FLOWERS A. ANNUAL FLOWER BEDS SHALL BE PERIODICALLY MULCHED AND THE SOIL

AMENDED ANNUALLY. NEW PLANTINGS SHALL BE PROVIDED IN MAY OF EACH YEAR. DURING THE GROWING SEASON, ALL BEDS SHALL RECEIVE PERIODIC INSPECTIONS PER NOTE I, IRRIGATION AND WEEDING TO MAINTAIN A NEAT APPEARANCE.

January 2010

IV. TURF

A. LAWN AREAS SHALL NOT EXCEED A HEIGHT OF 4 INCHES. APPROXIMATELY 12-15 MOWINGS PER YEAR WILL BE REQUIRED.

B. FERTILIZER AND SOIL AMENDMENTS SHOULD BE ADDED A NECESSARY

AND/OR ON A SEASONAL BASIS. FERTILIZER IS OPTIMALLY APPLIED TO LAWN AND TURF AREAS THREE TIMES PER SEASON. TIMING, FREQUENCY AND RATE OF APPLICATION SHALL BE ADJUSTED ACCORDING TO WEATHER AND TO HORTICULTURAL AND SOIL TEST CONDITIONS FOR EACH SPECIFIC SITE. FERTILIZER SHALL BE APPLIED BY ACCEPTED METHODS ONLY. SAFETY SHALL BE OF PRIME CONSIDERATION. CARE SHALL BE TAKEN NOT TO APPLY FERTILIZER WHEN THE GROUND IS WET.

C. SOIL AMENDMENTS SUCH AS LIME, GYPSUM OR PEAT MOSS MAY BE TO BE

ADDED TO THE SOILS OF LAWNS, TURF OR PLANITNG AREAS PERIODICALLY. THE NEED FOR SUCH SOIL AMENDMENTS SHALL BE ANALYZED DURING THE PERIODIC INSPECTIONS AND IN CONJUNCTION WITH SOIL TESTS.

D. SOIL AMENDMENTS SHALL BE APPLIED IN ACCORDANCE WITH

MANUFACTURERS' SPECIFICATIONS OR BASED UPON SOIL TEST RESULTS. APPLY A 3-1-2 (21-7-14, 10-4-6, OR 24-4-B) 50% ORGANIC FERTILIZER TWICE A

YEAR BETWEEN MARCH 15 TO APRIL 15 AND SEPTEMBER 1 TO OCTOBER 1. TWO ADDITIONAL APPLICATIONS MAY BE APPLIED IN MAY AND NOVEMBER, IF NECESSARY.

DO NOT APPLY FERTILIZER OR SOIL AMENDMENTS WHILE TURF IS EITHER

WET OR UNDER EXTREME STRESS, IN WINDY CONDITIONS, OR WHEN CHILDREN ARE PRESENT.

V. PRUNING A. REMOVAL OF DEAD, DISEASED, INSECT INFESTED OR WEAK WOOD SHALL

TAKE PLACE IN THE DORMANT SEASON OR AFTER FLOWERING. EXCESSIVE SHOOTS AND SUCKERS SHALL BE REMOVED.

B. SHRUB MATERIAL USED AS A SCREEN SHALL BE PRUNED AS A MASS TO

ENHANCE THEIR NATURAL FORM. C. ROOT PRUNING OF TREES ADJACENT TO CURBS OR SIDEWALKS SHALL

OCCUR DURING PERIODIC INSPECTIONS WITH KNOWLEDGE OF MOST RECENT PRUNING. NO MORE THAN 1/3 OF ROOT SYSTEM SHALL BE PRUNED DURING A YEAR.

January 2010

VI. INSECT AND DISEASE CONTROL A. THE CONTROL OF INSECTS AND DISEASE ASSOCIATED WITH ALL

PLANTING AREAS SHALL ALWAYS BE A MAINTENANCE PRIORITY. ALL PLANTINGS, INCLUDING EXISITING MATURE TREES, SHALL BE PERIODICALLY INSPECTED FOR INSECT OR DISEASE INFESTATION. METHODS UTILIZED TO CONTROL INSECTS OR DISEASE MAY RANGE FROM SPRAYING AND PRUNING TO PLANT REMOVAL. WHATEVER METHOD IS UTILIZED, SAFETY AND CONTROL SHALL BE OF PRIME CONCERN. TRAINED AND CERTIFIED PERSONNEL SHALL PERFORM THESE TASKS.

VII. RENOVATION A. RENOVATION INCLUDES THE RESEEDING OR REPLANTING OF

LANDSCAPE AREAS DAMAGED, DESTROYED OR FAILING DUE TO INSECTS, DISEASE, WEATHER OR PHYSICAL DAMAGE.

B. LAWN -- ALL AREAS WHERE SOIL HAS BEEN EXPOSED SHALL BE

RENOVATED DURING THE NEXT PLANTING SEASON. PROPER HORTICULTURAL AND SOIL EROSION PREVENTION METHODS SHALL BE UTILIZED. IF SOIL EROSION HAS OCCURRED, THE AREA SHALL BE REPAIRED WITH A SEED MIXTURE COMPATIBLE TO EXISTING SOIL AND EXSITING PLANTINGS SHALL BE UTILIZED.

C. PLANTINGS -- ALL PLANTINGS WHICH ARE DAMAGED OR

DESTROYED SHALL BE REPLACED DURING THE NEXT GROWING SEASON. A FAILING, DAMAGED OR DESTROYED LANDSCAPE SCREEN OR BUFFER MUST BE RENOVATED OR REPLACED WITHIN A REASONABLE PERIOD OF TIME, BUT NOT TO EXCEED THE SUBSEQUENT GROWING SEASON.

VIII. SITE AMENITIES A. BENCHES, PATHS, BICYCLE RACKS, TRASH RECEPTACLES AND SIGNS SHALL

BE INSPECTED AT LEAST TWICE A YEAR, ONCE IN MARCH AND ONCE IN AUGUST, TO DETERMINE THEIR CONDITION. ANY DAMAGED, WORN OR UNSAFE CONDITIONS SHALL BE RECTIFIED IMMEDIATELY.

IX. PAVED SURFACES A. ALL PAVED SURFACES, CONCRETE SIDEWALKS, ASPHALT PAVEMENT AND

DECORATIVE PAVEMENT SHALL BE INSPECTED ON A REGULAR BASIS. ALL SUCH SURFACES SHALL BE INSPECTED AT LEAST ONCE PER MONTH.

B. TRASH, STAINS AND/OR OBSTRUCTIONS SHALL BE REMOVED

IMMEDIATELY. PAVEMENT SHALL BE INSPECTED FOR DAMAGE, CRACKS, AND/OR POT HOLES, AND RETURNED TO THEIR ORIGINAL CONDITIONS.

C. SNOW SHALL BE REMOVED DURING AND FOLLOWING EVERY STORM.

SIDEWALKS AND PARKING AREAS SHALL BE KEPT CLEAR OF ICE AND SNOW DURING BUSINESS HOURS.

January 2010

PLANTING NOTES

I. PLANT MATERIAL SHALL BE FURNISHED AND INSTALLED AS INDICATED, INCLUDING

ALL LABOR, MATERIALS, PLANTS, EQUIPMENT, INCIDENTALS, AND CLEAN-UP.

II. THE CONTRACTOR SHALL BE RESPONSIBLE FOR PLANTING AT CORRECT GRADES AND ALIGNMENT. LAYOUT IS TO BE APPROVED BY OWNERS' REPRESENTATIVE PRIOR TO INSTALLATION.

III. PLANTS SHALL BE TYPICAL OF THEIR SPECIES AND VARIETY; HAVE NORMAL GROWTH

HABITS, WELL-DEVELOPED DENSELY FOLIATED BRANCHES, AND VIGOROUS ROOT SYSTEMS; AND BE FREE FROM DEFECTS AND INJURIES.

IV. CONTRACTOR SHALL REPORT ANY SOIL OR DRAINAGE CONDITIONS CONSIDERED

DETRIMENTAL TO GROWTH OF PLANT MATERIAL.

V. ALL PLANT MATERIAL SHALL BE GUARANTEED BY THE CONTRACTOR TO BE IN VIGOROUS GROWING CONDITION. PROVISION SHALL BE MADE FOR A GROWTH GUARANTEE OF AT LEAST ONE YEAR FROM THE DATE OF ACCEPTANCE FOR TREES AND SHRUBS. REPLACEMENTS SHALL BE MADE AT THE BEGINNING OF THE FIRST SUCEEDING PLANTING SEASON. ALL REPLACEMENTS SHALL HAVE A GUARANTEE EQUAL TO THAT STATED ABOVE.

VI. PLANT MATERIAL SHALL BE PLANTED ON THE DAY OF DELIVERY IF/WHEN

PRACTICAL. IN THE EVENT THAT THIS IS NOT POSSIBLE, THE CONTRACTOR SHALL PROTECT STOCK NOT PLANTED. PLANTS SHALL NOT REMAIN UNPLANTED FOR LONGER THAN A THREE-DAY PERIOD AFTER DELIVERY. ANY PLANTS NOT INSTALLED DURING THIS PERIOD SHALL BE REJECTED, UNLESS OWNER AND CONTRACTOR PROVIDE OTHERWISE BY WRITTEN AGREEMENT.

VII. QUALITY AND SIZE OF PLANTS, SPREAD OF ROOTS, AND SIZE OF ROOTBALL SHALL BE

IN ACCORDANCE WITH THE MOST RECENT VERSION OF ANSI Z60 "AMERICAN STANDARD FOR NURSERY STOCK" PUBLISHED BY THE AMERICAN ASSOCAITION OF NURSERYMEN, INC.

VIII. ALL PLANTS SHALL BE PLANTED IN AMENDED TOP SOIL THAT IS THROUGHLY

WATERED AND TAMPED AS BACK-FILLING PROGESSES. PLANTING MIX IS TO BE AS SHOWN ON PLANTING DETAILS. LARGE PLANTING AREAS TO INCORPORATE FERTILIZER AND SOIL CONDITIONERS AS STATED IN PLANTING SPECIFICATIONS.

IX. PLANTS SHALL NOT BE BOUND WITH WIRE OR ROPE AT ANY TIME SO AS TO DAMAGE

THE BARK OR BREAK BRANCHES. PLANTS SHALL BE HANDLED FORM THE BOTTOM OF THE ROOT BALL ONLY.

January 2010

X. PLANTING OPERATIONS SHALL BE PERFORMED DURING PERIODS WITHIN THE PLANTING SEASON WHEN WEATHER AND SOIL CONDITIONS ARE SUITABLE AND IN ACCORDANCE WITH ACCEPTED LOCAL PRACTICE. PLANTS SHALL NOT BE INSTALLED IN TOP SOIL THAT IS IN A MUDDY OR IN FROZEN CONDITIONS. ALL PLANT MATERIAL SHALL BE SPRAYED WITH "WILT-PRUF" OR EQUAL AS PER MANUFACTURERS INSTRUCTIONS.

XI. NO PLANT, EXCEPT GROUNDCOVERS, SHALL BE PLANTED LESS THAN TWO FEET FROM

EXISTING STRUCTURES AND SIDEWALKS.

XII. SET ALL PLANTS PLUMB AND STRAIGHT. SET AT SUCH LEVEL THAT A NORMAL OR NATURAL RELATIONSHIP TO THE GROUND IF THE PLANT WITH THE GROUND SURFACE WILL BE ESTABLISHED. LOCATE THE PLANT IN THE CENTER OF THE PIT.

XIII. ALL INJURED ROOTS SHALL BE PRUNED TO MAKE CLEAN ENDS BEFORE PLANTING

UTILIZING CLEAN, SHARP TOOLS. IT IS ADVISABLE TO PRUNE APPROXIMATELY 1/3 OF THE GROWTH OF LARGE TREES (2" CALIPER AND GREATER) BY THE REMOVAL OF SUPERFLUOUS BRANCHES, THOSE WHICH CROSS, THOSE WHICH RUN PARALLEL, ETC. MAIN LEADER OF TREES SHALL NOT BE CUT BACK. LONG SIDE BRANCHES SHALL BE SHORTENED.

XIV. EACH TREE AND SHRUB SHALL BE PRUNED IN ACCORDANCE WITH STANDARD

HORTICULTURAL PRACTICE TO PRESERVE THE NATURAL CHARACTER OF PLANT. PRUNING SHALL BE DONE WITH CLEAN, SHARP TOOLS.

XV. TREES SHALL BE SUPPORTED IMMEDIATELY AFTER PLANTING. ALL TREES 6" AND

GREATER IN CALIPER SHALL BE GUYED. SMALLER TREES SHALL BE STAKED. GUYING WIRES AND STAKES SHALL BE INSTALLED AS INDICATED. THE LANDSCAPE CONTRACTOR SHALL REMOVE STAKING, GUYING AND TREE WRAP AT THE END OF ONE YEAR MAINTENANCE AND GUARANTEE PERIOD.

XVI. ALL PLANTING BEDS SHALL BE MULCHED WITH 3" LAYER OF DOUBLE SHREDDED

HARDWOOD BARK MULCH.

XVII. NEW PLANTING AREAS AND SOD SHALL BE ADEQUATELY IRRIGATED OR WATERED TO ESTABLISH THE PROPOSED PLANTS AND LAWN.

January 2010

XVIII. ALL PLANTS SHOWN ON THE APPROVED LANDSCAPE PLAN SHALL BE INSTALLED, INSPECTED AND APPROVED BY THE DEPARTMENT OF COMMUNITY PLANNING, HOUSING AND DEVELOPMENT’S LANDSCAPE ARCHITECT/PLANNER OR HIS/HER REPRESENTATIVE. STREET TREES SHALLED BE INSTALLED, INSPECTED AND APPROVED BY DEPARTMENT OF PARKS, RECREATION, AND CULTURAL RESOURCES’ URBAN FORESTER. THE LANDSCAPE ARCHITECT/PLANNER SHALL TAKE INTO ACCOUNT SEASONAL CONSIDERATIONS IN THIS REGARD. TREES, SHRUBS, VINES AND GROUNDCOVER AS REQUIRED BY OR ASSOCIATED WITH A SUBDIVISION OR SITE PLAN APPROVED BY THE PLANNING AUTHORITIES SHALL BE INSTALLED DURING THE FOLLOWING PLANTING SEASONS:

TYPE DATES PLANTS 03/15 TO 12/15 LAWNS 03/15 TO 06/15 09/15 TO 12/01 THE FOLLOWING TREE VARIETIES SHALL NOT BE PLANTED DURING THE FALL

PLANTING SEASON DUE TO THE HAZARDS ASSOCIATED WITH PLANTING THESE TREES IN THIS SEASON:

ACER RUBRUM POPULUS SPP. BETULA SPP. PRUNUS SPP. CARPINUS SPP. PYRUS SPP. CRATECUS SPP. QUERCUS SPP. KOELREUTERIA PANICULATA SALIX SPP. LIQUIDAMBAR STYRACIFLUA TILIA TOMENTOSA LIRIODENDRON TULIPIFERA ZELKOVA PLATANUS ACERIFOLIA ANY PLANTING INSTALLED IN CONFLICT WITH THIS REQUIREMENT MUST

RECEIVE WRITTEN APPROVAL OF THE LANDSCAPE ARCHITECT/PLANNER PRIOR TO PLANTING. FAILURE TO COMPLY WITH THESE REQUIREMENTS WILL REQUIRE THE REMOVAL OF THE PLANTING IN QUESTION. THIS REQUIREMENT DOES NOT APPLY TO SEEDING OR SODDING OR PLANTINGS SPECIFICALLY FOR SOIL STABILIZATION PURPOSES. PLANTINGS ASSOCIATED WITH ANY LOT GIVEN A CERTIFICATE OF OCCUPANCY OUTSIDE THESE PERIODS SHALL BE PROVIDED DURING THE PREVIOUS OR NEXT APPROPRIATE SEASON.

XIX. ALL DISTURBED AREAS SHALL BE TREATED WITH 4" TOP SOIL AND SEEDED IN

ACCORDANCE WITH PERMANENT STABILIZATION METHODS INDICATED ON SOIL EROSION AND SEDIMENT CONTROL SHEET.

PLANT SCHEDULE

QTY. KEY GENUS SPECIES VARIETY COMMON NAME SIZE SPACING REMARKS

12 AR ACER RUBRUM 'OCTOBER GLORY' OCTOBER GLORY RED MAPLE 4-4.5" CAL 30.0' O.C. B&B10 GT GLEDITSIA TRIACANTHOS VAR. INERMIS 'SHADEMASTER' SHADEMASTER HONEY LOCUST 4-4.5" CAL 30.0' O.C. B&B10 PA PLATANUS ACERIFOLIA 'BLOODGOOD' BLOODGOOD LONDON PLANE 4-4.5" CAL 30.0' O.C. B&B10 QP QUERCUS PHELLOS WILLOW OAK 4-4.5" CAL 30.0' O.C. B&B

20 IC ILEX CRENATA 'COMPACTA' COMPACT JAPANESE HOLLY #3 3.0' O.C. CONTAINER40 JC JUNIPERUS CHINENSIS 'SEA GREEN' SEA GREEN CHINESE JUNIPER #3 3.0' O.C. CONTAINER40 JY JUNIPERUS HORIZONTALIS 'ANDORRA' ANDORRA JUNIPER #3 3.0' O.C. CONTAINER

300 AG ACORUS GRIMINESS 'VARIEGATUS' VARIGATED SWEET FLAG #SP1 6" O.C.300 OP OPHIOPOGON JAPONICUS MONDO GRASS #SP1 6" O.C.

100 AC ACHILLEA MILLEFOLIUM 'PAPRIKA' YARROW #SP3 12" O.C.100 EP ECHINACEA PURPUREA 'MAGNUS' PURPLE CONEFLOWER #SP4 12" O.C.100 LS LIATRIS SPICATA 'FLORISTAN WHITE' BLAZING STAR 12 CM+ 12" O.C.50 LI LIGULARIA STENOCEPHLA 'THE ROCKET' SENICO #SP4 18" O.C.

PERENNIALS

TREES

SHRUBS

GROUNDCOVER

January 2010

PLANTING SPECIFICATIONS

I. SCOPE OF WORK A. THIS WORK SHALL CONSIST OF CLEARING AND SOIL PREPARATION, FINISH

GRADING, PLANTING AND DRAINAGE, INCLUDING ALL LABOR, MATERIALS, TOOLS, EQUIPMENT AND ANY OTHER APPURTENANCES NECESSARY FOR THE COMPLETION OF THIS PROJECT.

II. MATERIALS A. GENERALLY ALL MATERIALS SHALL BE BEST OF ITS KIND AVAILABLE. SOIL AND

PLANTING SHALL NOT BEGIN UNTIL ALL IRRIGATION WORK AROUND PLANTING AREAS IS COMPLETE AND APPROVED.

B. PLANTS ALL PLANTS SHALL BE HEALTHY, OF NORMAL GROWTH, WELL-ROOTED,

AND FREE FROM DISEASE AND INSECTS. C. TOPSOIL ORGANIC TOPSOIL SHALL BE FREE OF DEBRIS, ROCKS LARGER THAN 2",

WOOD, ROOTS, VEGETABLE MATTER AND CLAY CLODS. D. MULCH MULCH SHALL BE DOUBLE-SHREDDED HARDWOOD BARK. III. FERTILIZER AND CONDITIONERS A. ORGANIC FERTILIZER SHALL BE PROCESSED SEWER SLUDGE WITH

MINIMUM CONTENT OF 1% NOTROGEN AND 2% PHOSPHORIC ACID, EQUAL TO "NITROHUMUS."

B. ORGANIC FERTILIZER AND SOIL CONDITIONER SHALL BE "GRO-POWER"

OR EQUAL AND ORGANIC BASE MATERIALS COMPRISED OF DECOMPOSED ANIMAL AND VEGETABLE MATTER AND COMPOSTED TO SUPPORT BACTERIAL CULTURES, CONTAINING NO POULTRY, ANIMAL OR HUMAN WASTE. GUARANTEED ANALYSIS (5-3-1); NITROGEN 5%, PHOSPHATE 3%, POTASH 1%, 50% HUMUS AND 15% HUMIC ACIDS.

IV. GENERAL WORK PROCEDURES A. LANDSCAPE WORK SHALL BE ACCORDING TO THE WORKMANLIKE

STANDARDS ESTABLISHED FOR LANDSCAPE CONSTRUCTION AND PLANTINGS.

January 2010

V. WEEDING A. BEFORE AND DURING PRELIMINARY GRADING AND FINISH GRADING, ALL

WEEDS AND GRASSES SHALL BE DUG OUT BY THE ROOTS AND DISPOSED OF AT THE CONTRACTOR'S EXPENSE.

VI. TOPSOIL A. CONTRACTOR SHALL PROVIDE 4" MINIMUM THICK TOPSOIL LAYER IN ALL

PLANTING AREAS. TOPSOIL SHALL BE SPREAD OVER A PREPARED SURFACE AS A UNIFORM LAYER TO PRODUCE A 4" COMPACTED THICKNESS. TOPSOIL PRESENT AT THE SITE, IF ANY, MAY BE USED TO SUPPLEMENT TOTAL AMOUNT REQUIRED.

VII. SOIL CONDITIONING A. CULTIVATE ALL AREAS SHALL BE PLANTED TO DEPTH OF 6". ALL DEBRIS

EXPOSED FROM EXCAVATION AND CULTIVATION SHALL BE DISPOSED OF AT THE CONTRACTOR'S EXPENSE. CONDITIONER SHALL BE SPREAD EVENLY IN ALL PLANTING AREAS AND TILLED IN TWO DIRECTIONS INTO THE TOP 4", WITH THE FOLLOWING PER 1,000 SQUARE FEET.

150 POUNDS "GRO-POWER" OR EQUAL 100 POUNDS AGRICULTURAL GYPSUM 20 POUNDS NITROFORM (COURSE) 3-O-OS BLUE CHIP VIII. PLANTING POSITION TREES AND SHRUBS AT THEIR INTENDED LOCATIONS AS PER THE

PLANS AND SECURE THE APPROVAL OF THE LANDSCAPE ARCHITECT OR HIS REPRESENTATIVE BEFORE EXCAVATING THE PITS, MAKING NECESSARY ADJUSTMENTS AS DIRECTED.

A. PLANTING PITS SHALL BE DUG WITH LEVEL BOTTOMS, TWICE THE WIDTH

OF THE DIAMETER OF THE ROOT BALL AND DEPTH MATCHING ARLINGTON COUNTY DETAILS R7.2 AND R7.6. EACH PLANT PIT SHALL BE BACKFILLED WITH THE FOLLOWING PREPARED SOIL, MIXED THOROUGHLY:

1 PART LEAF MOULD OR COMPOST 1 PART COW MANURE BY VOLUME 3 PARTS TOPSOIL BY VOLUME 21 GRAMS "AGRIFORM" PLANTING TABLETS OR EQUAL 2 TABLETS PER 1 GAL. PLANT 3 TABLETS PER 5 GAL. PLANT 4 TABLETS PER 15 GAL. PLANT

(FOR LARGER PLANTS, 2 TABLETS PER 1/2" DIAMETER OF TRUNK CALIPER) B. PREPARED SOIL SHALL BE TAMPED FIRMLY AT BOTTOM OF PIT. FILL

PREPARED SOIL AROUND BALL OF PLANT HALFWAY, INSERT PLANT TABLETS, COMPLETE BACKFILL AND WATER THOROUGHLY.

January 2010

C. ALL PLANTS SHALL BE SET SO THAT THEY BEAR THE SAME RELATION TO THE REQUIRED GRADE AS THEY BORE TO THE NATURAL GRADE BEFORE BEING TRANSPLANTED.

D. IMMEDIATELY AFTER PLANTING, STAKE ALL TREES TO PREVENT DAMAGE

FROM WIND. FASTEN TREES TO UPPER END OF STATE IN AT LEAST TWO PLACES USING HOSE TYPE TIES.

E. PREPARE RAISED EARTH BASIN AS WIDE AS PLANTING HOLE OF EACH

TREE. F. WATER IMMEDIATELY AFTER PLANTING. WATER SHALL BE APPLIED TO

EACH TREE AND SHRUB IN SUCH MANNER AS NOT TO DISTURB BACKFILL AND TO THE EXTENT THAT ALL MATERIALS IN THE PLANTING HOLE ARE THOROUGHLY SATURATED.

G. PRUNE ALL PROPOSED TREES DIRECTLY ADJACENT TO WALKWAYS TO A

MINIMUM OF 7'-0" BRANCHING HEIGHT. IX. GROUND COVER A. ALL GROUND COVER AREAS SHALL RECEIVE A 1/4" LAYER OF HUMUS

RAKED INTO THE TOP 1" OF PREPARED SOIL PRIOR TO PLANTING GROUND COVER.

B. SPACING AND VARIETY OF GROUND COVER SHALL BE AS SHOWN ON

APPROVED DRAWINGS. C. IMMEDIATELY AFTER PLANTING GROUND COVER, CONTRACTOR SHALL

THOROUGHLY WATER THE GROUND COVER. D. ALL GROUND COVER AREAS SHALL BE TREATED WITH A PRE-EMERGENT

BEFORE FINAL LANDSCAPE INSPECTION. GROUND COVER AREAS SHALL BE WEEDED PRIOR TO APPLYING PRE-EMERGENT. PRE-EMERGENT SHALL BE APPLIED PER MANUFACTURER'S RECOMMENDATION.

X. FINISH GRADING A. ALL AREAS WILL BE RECEIVED BY THE CONTRACTOR AT SUBSTANTIALLY

PLUS/MINUS 0.1 FOOT OF FINISH GRADE. B. ALL LAWN AND PLANTING AREAS SHALL BE GRADED TO A SMOOTH, EVEN

AND UNIFORM PLANE WITH NO ABRUPT CHANGE OF SURFACE, UNLESS OTHERWISE DIRECTED BY LANDSCAPE ARCHITECT OR HIS REPRESENTATIVE. SOIL AREAS ADJACENT TO BUILDINGS SHALL SLOPE AWAY FROM BUILDING.

C. ALL PLANTING AREAS SHALL BE GRADED AND MAINTAINED TO ALLOW

FREE FLOW OF SURFACE WATER.

January 2010

XI. GUARANTEE A. CONTRACTOR SHALL GUARANTEE ALL PLANTS FOR A PERIOD OF TWO

YEARS FROM ACCEPTANCE OF JOB. XII. CLEAN UP A. UPON THE COMPLETION OF ALL PLANTING WORK AND BEFORE FINAL

ACCEPTANCE, THE CONTRACTOR SHALL REMOVE ALL MATERIAL, EQUIPMENT AND DEBRIS RESULTING FROM HIS WORK. ALL PAVED AREAS SHALL BE BROOM CLEANED AND THE SITE LEFT IN A NEAT AND ACCEPTABLE CONDITION AS APPROVED BY THE OWNER'S AUTHORIZED REPRESENTATIVE.

B. ALL TREES, SHRUBS OTHER PLANTS AND PLANT BEDS SHALL BE

MAINTAINED BY PRUNING, CULTIVATING AND WEEDING AS REQUIRED FOR HEALTHY GROWTH. THIS WORK SHALL INCLUDE RESTORING PLANTING SAUCERS; TIGHTENING AND REPAIRING STAKES AND GUY SUPPORTS; RESETTING TREES AND SHRUBS TO PROPER GRADES OR VERTICAL POSITION AS REQUIRED; RESTORING OR REPLACING DAMAGED WRAPPINGS; AND SPRAYING WITH HERBICIDE AS REQUIRED TO KEEP TREES AND SHRUBS FREE OF INSECTS AND DISEASE.

C. LAWNS SHALL BE MAINTAINED BY WATERING, FERTILIZING, WEEDING,

MOWING, TRIMMING AND OTHER OPERATIONS SUCH AS ROLLING, REGRADING, AND REPLANTING AS REQUIRED TO ESTABLISH A SMOOTH, ACCEPTABLE LAWN FREE OF ERODED OR BARE AREAS.

XIII. MAINTENANCE (ALTERNATE BID) COST PER MONTH AFTER INITIAL 90-DAY MAINTENANCE PERIOD. XIV. PLANTING MATERIAL GUARANTEE A. PLANTING MATERIAL SHALL BE OF GOOD NURSERY STOCK AND A

NURSERY GUARANTEE SHALL BE PROVIDED BY THE GENERAL CONTRACTOR THROUGH THE DEVELOPER FOR TWO YEARS, INCLUDING THE REPLACEMENT AND MAINTENANCE TO INCLUDE BUT NOT BE LIMITED TO PRUNING, FEEDING, SPRAYING, MULCHING, WEEDING AND WATERING OF ALL LANDSCAPE MATERIALS FOLLOWING THE ISSUANCE OF THE MASTER CERTIFICATE OF OCCUPANCY.

XV. URBAN FORESTER NOTIFICATION A. THE DEVELOPER AGREES TO NOTIFY THE ARLINGTON COUNTY

DEPARTMENT OF PARKS, RECREATION AND CULTURAL RESOURCES URBAN FORESTER AT 703-228-6557 AT LEAST 72 HOURS IN ADVANCE OF THE SCHEDULED PLANTING OF ANY TREES IN THE PUBLIC RIGHT OF WAY AND TO BE AVAILABLE AT THE TIME OF PLANTING TO MEET WITH THE STAFF OF THE DPRCR TO INSPECT THE PLANT MATERIAL, TREE PIT, AND THE TECHNIQUE OF PLANTING. SOIL USED IN THE TREE PIT MUST MEET THE SPECIFICATIONS FOR STREET TREE PLANTING "STANDARDS FOR PLANTING AND PRESERVATION OF TREES ON SITE PLAN PROJECTS" AVAILABLE FROM THE URBAN FORESTER.

PART 3 PLANTING STANDARDS AND DETAILS

Applicability:



This document, “Standards for Preservation and Planting of Trees on Site Plan Projects” as endorsed by the Arlington County Board on December 7, 2002 provides standards and details for all projects to follow.

STANDARDS FOR

PLANTING AND PRESERVATION

OF TREES ON SITE PLAN PROJECTS

FINAL

Endorsed by Arlington County Board

December 7, 2002

PREPARED BY ARLINGTON COUNTY

STREET TREE FOCUS GROUP

Revised January 2010

Tree Planting Standards

STANDARDS FOR PLANTING AND PRESERVATION OF TREES ON SITE PLAN PROJECTS

TABLE OF CONTENTS

I. Site Plan Review Process II. Best Practices A. Tree Preservation B. Tree Pit Size/Planting Strip Size C. Tree Species D. Tree Size (Caliper) E. Spacing F. Compaction Prevention Methods G. Ground Cover H. Below ground structure I. Underground Utilities J. Activities for Tree Planting Prior to Sidewalk Construction K. Tree Planting L. Tree Maintenance III Figures 1. Tree pit with railing 2. Tree pit with railing 3. Tree pit with brick curb

IV. Details (see link below for details) http://www.arlingtonva.us/departments/CPHD/planning/docs/CPHDPlanningDocsLandscapeDocs.aspx

R-7.0 General Standard for Tree Planting R-7.1 Shrub and Ground Cover Planting Detail R-7.2 Planting Trees in Open Area or Grass Strip R-7.4 Expandable Tree Grate and Frame Details R-7.6 Tree Planting Detail for Street Tree in Pit R-7.6.A Tree Pit Drainage Details R-7.7 Tree Protection Detail for Determination of Critical Root Zone R-7.9.A Root Paths Root Paths Illustration R-7.9.B Continuous Soil Panel R-7.9.C Structural Soil Drawing Ref. No. II.A.5 Typical Signage for Tree Preservation Area Drawing Ref. No. II.H. Structure Free Zone Under Sidewalk Drawing Ref.: Tree Protection Fence, Elevation Drawing Ref.: Tree Protection Fence, Plan Drawing Ref. No. II.B.1. 12’ Combined Sidewalk and Planting Area Drawing Ref. No. II.B.2. 13’ Combined Sidewalk and Planting Area Drawing Ref. No. II.B.3. 16’-8” Combined Sidewalk and Planting Area Drawing Reference: Streetlight Detail


STANDARDS FOR PLANTING AND PRESERVATION OF TREES ON SITE PLAN PROJECTS*

Tree-lined streets help to soften the edges of the urban environment, contributing to a community’s charm and livability. In addition to the aesthetic benefits provided by a healthy urban forest, trees help to clean the air, stabilize the soil, decrease storm water runoff, provide shade to reduce urban heat island effects, reduce summer cooling costs in buildings, and create a welcoming environment for pedestrians. The following standards are designed to ensure that practices and procedures to help ensure tree health and survival are incorporated into Site Plan requirements. These standards will also serve as guidelines for trees in Unified Residential Development projects. Mechanisms for helping to enhance tree cover and ensure a healthy urban forest are addressed in two major categories: Section I., Site Plan Review Process, and Section II., “Best Practices” for on-site tree preservation, site preparation, tree planting and tree maintenance. Together, these standards are designed to promote high quality development by including the requirements necessary to support green infrastructure as an important component of all projects. This document is the first step toward making Arlington a “Model Community” for trees. This was the charge given by the Arlington County Manager in 2001 to an interdepartmental working group including staff from CPHD, PRCR, and DES. The working group reviewed existing documents and current technologies for these recommendations. Local industry professionals and representatives from surrounding jurisdictions provided additional review and input.

I. Site Plan Review Process The Site Plan Review Process is set up to guarantee certain standards of development in Arlington. The process involves the county and developer in a dialogue to achieve the best possible building on a particular site. Trees and green infrastructure are important components of quality development. Street trees contribute to the quality of life, and the streetscape is where the public forms an initial impression of a building or space. The following criteria are intended to ensure that trees are considered early in the process so that their special requirements can be provided.

1. Trees need to be considered earlier in the process. a) Provide Tree Planting Standards to CPHD Site Plan Reviewers and Property owners

that must be included in the Site Plan Conditions for each project b) Require Site Plan Reviewers to consult with the Landscape Review Team if they

wish to deviate from the Tree Planting Standards c) Provide more resources for landscape review process

2. Require approval of Landscape Plan prior to issuance of "Excavation, Sheeting, and Shoring" permit.

3. Require re-approval of Landscape Plan before County Board approves the extension if approved Site Plans approach their expiration date and the property owner requests extension.

4. Once the formal Landscape Plan has been approved by the County, all changes made post-approval require the submission of a Landscape Plan Revision - Administrative Change to the Zoning Office for approval by the County.

*These standards will also serve as guidelines for trees in By-Right Development Projects, Use Permit Projects, Unified Development Projects (URD and UCMD), and County Initiated Projects.


II. Best Practices These requirements are intended to insure that trees achieve maximum health and survival. They represent the most recent information available in the industry. They outline standards to be followed to preserve existing trees, criteria for new tree planting and maintenance as well as possible construction methods. Methods to enhance root growth, minimize soil compaction, provide for larger rooting areas are included as well as recommendations on tree spacing, size and species.

A. Tree Preservation 1. Property owner shall submit a tree inventory drawing indicating diameter breast height

(DBH), species and location for all trees over 3" in diameter on the property to be developed and any trees on adjacent property whose critical root zones extend onto the property to be developed.

2. Property owner shall submit Tree Protection Plan designating trees to be preserved and trees to be removed on subject and adjacent property and replacement trees for those removed in accordance with mandatory Arlington County Tree Replacement Guidelines. Results of Tree Replacements Guidelines must be shown in tabular form as illustrated in said guidelines.

3. The Tree Protection Plan must be approved by Arlington County prior to issuance of a Clearing and Grading Permit.

4. Use critical root zone detail as a minimum requirement for the area to be protected. Specimen trees will be designated by the Urban Forester and protected according to Detail R-7.7.

5. Tree protection fencing shall be erected at the critical root zone or beyond prior to start of any clearing, grading or other construction activity. Signs stating "No Entry, Tree Protection Area, Call 703-228-6557 to report violations" are to be posted in both English and Spanish. See Detail II.A.5.

6. Tree protection shall be a minimum of 6' high chain link fence mounted on vertical pipes driven 2' into the ground with no gates.

7. Submit photographic record (2 pictures) of all trees to be preserved over 3” DBH after fence is installed.

8. No person, materials or equipment shall be permitted within the tree protection area. Any violation of this requirement may result in a fine of $500 per day of violation.

9. Any damage to a tree being preserved shall result in a payment by the owner/developer to the County for the amount of damage based on the latest edition of “The Council of Tree and Landscape Appraisers Guide for Plant Appraisals” published by the International Society of Arboriculture (ISA). All trees are to be valued as Landscape Trees. For further guidance, see Arlington County Tree Appraisal Policy, adopted by the Arlington County Board October 2004.

10. Tree protection shall not be removed until completion of all construction activity. 11. When excavation is to take place within the Critical Root Zone, the developer shall

employ a professional arborist to root prune immediately beyond the limits of excavation to a depth of 18 inches, prior to excavation.

12. Any exceptions to the above requirements, such as construction within the Critical Root Zone, must be approved in advance by Arlington County by way of the tree preservation plan.

13. Additional requirements may be necessary on a case-by-case basis.


B. Tree Pit Size/Planting Strip Size

1. Increase the minimum sidewalk width from 10’ in medium density areas to 12’ wide sidewalk area: Minimum = 5' wide x 12' long pit, plus 8" brick band between curb and pit. (Leaves 6'-4" for walk.) This may be adjusted to pedestrian requirements and special site circumstances. See Reference Detail II B.1.

2. 13' to 14' wide sidewalk area: Minimum = 6' x 12' pit, plus 8" brick band between curb and pit. (Leaves 6'-4" minimum for walk.) See Reference Detail II B.2.

3. Increase the minimum sidewalk width from 15' in high density areas to 16’8”: Minimum = 6' x 12' pit, plus 8” brick band between curb and pit. (Leaves 10’ minimum for sidewalk.) See Reference Detail II B.3.

4. Special urban areas near building entrances and outdoor dining areas may require a smaller pit and grates (5’x8’). See Detail 7.4.

5. Continuous planting strips shall be as wide as possible with a recommended width of six (6) feet. In no case shall the planting strip for a tree be less than four (4) feet wide.

C. Tree Species

1. Street tree species planted on any block may be designated by Arlington County, and will typically be the same species and variety along the entire block.

2. Property owners may propose shade tree species for county reviewers to approve for planting in the public right-of-way.

D. Tree Size (Caliper)

1. 4" - 4.5" caliper minimum in high-density residential/commercial areas. Larger size calipers may be required when conditions permit.

E. Spacing

1. Recommended spacing is 25 to 30 feet. Use 30’ spacing to determine minimum number of street trees required. Actual spacing may vary due to local conditions. Consideration will be made for bus stop locations. The maximum range is 25 to 45 feet to accommodate for variables such as streetlights, fire hydrants, underground vaults, curb ramps, driveway aprons, and bus stops.

2. Street tree alignment and location shall be coordinated with the following, when applicable (Contact DES for more information): a) Street lights

i) Typical street light spacing is 90ft. (approximately). ii) Light poles and street trees shall be placed relative to each other such that light

fixtures would not be obscured by existing or future tree canopy. iii) Light poles shall be placed only within the “landscape” or “utility” zone.

b) Bike Racks i) Bike racks shall be placed within the “landscape/utility” zone or the building “shy”

zone. ii) Clearance between the sides of bike racks and any surrounding streetscape elements

(including tree pits) shall be 30” minimum (36” preferred). iii) Clearance from the front or rear legs of bike racks to any surrounding streetscape

elements (including tree pits) shall be 24” minimum. iv) Bike racks and their associated clearance areas shall not encroach upon any

designated clear sidewalk zone.


c) Benches

i) Benches shall be placed within the “landscape/utility” zone or the building “shy” zone.

ii) Preferred orientation in the landscape/utility zone is perpendicular to the curb. Preferred orientation in the shy zone is parallel to the building face. (See diagrams.)

iii) Benches shall be positioned to maintain 36” minimum accessibility. iv) Benches shall provide 24” minimum front clearance from any surrounding

streetscape elements - including tree pits or designated clear sidewalk zones.

F. Compaction Prevention Methods (by foot traffic) 1. Low, ornamental fence/barrier with ground cover or mulch (see photos). See Figures 1

and 2. 2. Grates should be used only where absolutely necessary and considered as a temporary

structure with a 5-10 year life span. They should only be allowed where sidewalk width is limited and pedestrian traffic is high, such as at building entrances and outdoor dining areas. See Detail R-7.4.

G. Ground Cover

1. Shredded hardwood bark or pine bark mulch. 2. Seasonal plantings or evergreen ground cover. 3. Non-compacting aggregate (gravel).

H. Below ground structure 1. Structure free zones are required. A minimum 5' deep structure free zone from building

wall under full width of sidewalk is preferred. If garage extends under sidewalk, 5’ deep structure free zone should extend 8’ from back of curb. See Reference 2.H.1. In addition, accommodation must be made for minimum 2’ deep tree rooting area between sidewalk sub-base and top of underground structure.

2. The structure free zone must consist of natural soil, free of steel, concrete, bricks and any other man-made debris.

3. Vault and tree locations must be shown the landscape plans.

I. Underground Utilities 1. No utilities are permitted in tree pits (with exception noted below).

a. Street light conduit is allowed adjacent to back of curb. b. Electrical outlets are ONLY allowed in the tree pit when located at the edge of the

pit (outlet to be semi-flush), e.g., for stringing tree lights. Excessive activity around trees is ultimately damaging to trees and prohibited.

J. Activities for Tree Planting Prior to Sidewalk Construction

1. Underdrain: Typically 4" perforated pipe 5' deep (4' of soil plus 1' of drainage gravel). Underdrain must have a minimum fall of 2%. See Detail R-7.6.A.

2. Storm drain: Underdrain to be connected to public storm drain system unless the crown of the storm drain pipe is higher than the tree underdrain pipe or the storm drain is otherwise unavailable. If storm drain unavailable, provide sump pit. See Detail R-7.6.A.

3. Urban Forester Notification: The property owner shall contact in person the PRCR Urban Forester or his representative at 703-228-6557 at least 72-hours in advance to arrange a mutually agreeable time for inspection of the underdrain by the Urban Forester or his representative.


4. Root Enhancement: The County will designate or the property owner will be required to utilize at least one of the four tree root enhancement options listed below: • Root Paths: Underground tunnels that link roots to more soil. This

technique is most effective when large areas of lawn or planting beds exist on the opposite side of the sidewalk. See Detail R-7.9.A.

• Continuous Soil Panel: The goal is to have sidewalk suspended over uncompacted soil. See Detail R-7.9.B.

• Structural Soils: This is both a planting medium and a construction material. See reference R-7.9.C.

• Structural Cells: Underground, interlocking grid-system to support sidewalk so soil is not compacted. Structural Cells must be purchased by a licensed producer and approved by the Urban Forester.

5. Irrigation: A reliable watering/irrigation system must installed. The property owner shall also install hose bibs on outside of the building in locations appropriate for watering the street trees.

6. Green Practices: A. Bioretention:

i. Plants should be suitable for bioretention systems and native to the region. ii. Plants should be spaced according to species appropriate guidelines. iii. Trees should be staked for 1 year. iv. Adequate watering should occur until all plant material is established

(approx. 1 year). v. Overall design and performance shall be in accordance with County

stormwater management requirements and design standards. B. Tree box filters:

i. Plant species should be suitable for tree box filters and native to the region unless otherwise approved by PRCR, CPHD, and DES designees.

ii. Adequate watering should occur until all plant material is established (approx. 1 year).

iii. Overall design and performance shall be in accordance with County stormwater management requirements and design standards.

K. Tree Planting

1. Urban Forester Notification: The property owner must contact in person the PRCR Urban Forester or his representative at 703-228-6557 at least 72-hours in advance to arrange a mutually agreeable time for inspection of trees and pits by the Urban Forester or his representative. The County reserves the right to reject any trees found unacceptable by the Urban Forester or his representative.

2. Source and Quality: Plants shall be typical of their species and variety; have normal growth habits; well-developed branches, densely foliated, vigorous root systems and be free from defects and injuries. Quality and size of plants, spread of roots, and size of root balls shall be in accordance with ANSI Z-60, American Standard for Nursery Stock (or most recent version) as published by the American Nursery and Landscape Association, Inc.

3. Nursery Plant Material Identification: Plant identification tag must be attached to plant material, or staked within planting bed until issuance of occupancy permit.

4. Planting: Trees shall be planted in accordance with the detail drawings provided by Arlington County, e.g., R-7.0, R-7.2 and R-7.6.


5. Soil: Soil mix shall be ½ clean existing soil (if existing is acceptable to Arlington County), ¼ certified topsoil and ¼ organic material. Plants shall not be installed in topsoil that is muddy or frozen. Unacceptable soil and debris must be removed. Soil mix must be approved by the Urban Forester prior to installation.

6. Timing: Plant material shall be planted on the day of delivery. In the event this is not possible, the contractor shall protect stock not planted. Plants shall not remain unplanted for longer than a three (3) day period after delivery. Any plants not installed during this period will be rejected.

7. Planting Depth and Location: All trees shall be set so that the top of root ball to be set 2" to 3" above the level of the surrounding soil. Trees shall be plum and located in the center of the pit.

8. Back Filling: The soil shall be thoroughly watered and lightly tamped as back filling progresses. Soil mix to be as specified above (K-5).

9. Pruning: Trees shall not be pruned at the time of planting unless required by the county representative.

10. Staking or Guying: Tree staking or guying shall be at the discretion of the property owner. However, the County reserves the right to require staking or guying, should the County representative determine it is necessary or advisable. Stakes or guys must be installed using accepted arboricultural practices.

11. Mulching: Trees shall be mulched with acceptable material 2"- 4" deep. Mulch shall be kept 6" from the trunk of the tree.

12. Watering: Trees shall be thoroughly watered twice within 48 hours of planting. 13. Guarantee: Property owner is required to maintain and replace trees in

perpetuity. Trees are to be guaranteed by the installer to be in a vigorous growing condition for a minimum of 2 years from the date of acceptance by the Urban Forester. Replacements shall be made at the beginning of the first seceding planting season. All replacements shall have a guarantee equal to that stated above.

L. Tree Maintenance

1. Maintenance and Replacement: The property owner shall continue to maintain and replace trees in perpetuity.

2. Watering: Trees shall be watered at a rate of five (5) gallons/tree twice per week during the growing season for the first three years. Use of "gator bags" is recommended. After three years, trees shall be watered as necessary. Take precaution against over-watering trees at all times. Irrigation systems must be kept in working order.

3. Pruning: Pruning shall take place in dormant season or after flowering. Street trees should be pruned to above head height on the sidewalk side. Pruning that may be performed shall include dead, diseased, infected, insect infested, crossing branches, co-dominant leaders, broken or weak wood and any branches that pose a hazard to pedestrians or vehicles. Shoots and suckers on the trunk shall be removed. All pruning shall be done in accordance with accepted arboricultural practices.

4. Fertilizing: Trees shall only be fertilized when a soil test indicates a deficiency. Fertilization should be formulated to correct the deficiency.

5. Pest and Disease Control: Insect and disease control shall be in accordance with accepted arboricultural practices. Permission shall be obtained from PRCR prior to spraying of trees in County right of way.

6. Weeding and Cleaning: Planting beds surrounding trees and tree pits shall be weeded and cleaned as necessary to maintain a weed free and trash free condition.

7. Replacement: If more than 30% of the crown is dead, the tree must be replaced. If the tree is physically damaged beyond hope of recovery, it must be replaced.

PART 4 REPLACEMENT GUIDELINES

Applicability:



The Tree Replacement Guidelines apply to both public and private properties.

Department of Environmental Services

Department of Parks, Recreation and Cultural Resources

Department of Community Planning, Housing and Development

T R E E R E P L A C E M E N T G U I D E L I N E S

ARLINGTON COUNTY, VIRGINIA

As approved in July 1993

1. GENERAL STATEMENT

2. STREET TREES

3. PARKS, OPEN SPACES, OTHER PUBLIC PROPERTIES

4. PRIVATE PROPERTY

5. TREE REPLACEMENT FORMULA

6. PRACTICAL EXAMPLES

1. GENERAL STATEMENT

Trees are routinely lost from publicly and privately owned and maintained areas for many reasons including private development, infrastructure maintenance and new construction by the County. This document provides guidelines for the replacement of trees affected by these types of projects.

2. STREET TREES

A number of street trees will be designed into each County street improvement project to reforest or afforest the appropriate sections of the right-of- way based on spacing and other conditions, regardless of the number of trees removed. Appropriate species, quantities and sizes will be suggested by Department of Parks, Recreation, and Cultural Resources (PRCR) in accordance with Administrative Regulation 4.3 or its addenda.

An evaluation of potential tree loss will be made prior to removals to determine if this reforestation or forestation represents reasonable compensation for the total value of the lost resource. To assist in that evaluation the following criteria shall be used:

Street trees designed into each County street improvement will count towards the replacement analysis and calculations.

As a minimum, trees 3”-10”caliper that are removed from the rights-of-way will be replaced on a one-for-one basis.

Significant trees (caliper greater than 10”) will be replaced at a rate derived from a formula of the International Society of Arboriculture (see attached).

Where there is not adequate room in the rights-of-way to replace the required number of trees within the project limits, the trees that cannot be accommodated will be provided in a monetary amount to the Tree Canopy Fund coordinated with Arlington County’s Department of Parks, Recreation, and Cultural Resources.

3. PARKS, OPEN SPACES, OTHER PUBLIC PROPERTIES

The guidelines are identical to the ones above, with the exception that shrubs and ground cover will also be designed into the reforestation, and replacement trees which cannot be placed at the project site will go back into parks, open spaces or other public properties (as opposed to rights-of-way) from a PRCR priority list.

4. PRIVATE PROPERTY

Trees removed from private property as part of a project will be replaced onto the same property using the same formula as above and any replacement trees that cannot be accommodated on site will be provided in a monetary amount to the Tree Canopy Fund coordinated with Arlington County’s Department of Parks, Recreation, and Cultural Resources.

5. TREE REPLACEMENT FORMULA

A. Definitions

Diameter Trunk diameter at four and one half feet above the ground.

Species All tree species given a value from 1 to 100 which is expressed as a percentage of 100 (e.g. 40 = 40% = .4). This is a value assigned to a species according to a number of factors including longevity, durability and appropriateness to the growing zone.

Condition Rating from 0 (dead) to 100% (perfect) and is expressed as a percentage of 100 (e.g. 100% = 1, 60% = .6, etc.).

B. Procedure

Scoring is determined by the multiplication of Diameter X Species X Condition. Shown below are three applications of the formula.

1. A 10" American Holly is automatically replaced with one tree, according to category 2 of the above policy.

2. A 40" Silver Maple (species rating of 40), rated at 60% condition is scored as 40 X .4 X .6 for a total score of 9.6.

3. A 36" White Oak (species rating of 80), rated at 70% condition is scored as 36 X .8 X .7 for a total score of 20.16.

C. Application to Replacement Policy

Trees are replaced at the following rates, based on the overall scores:

Rating: 1 – 4.9 = 1 tree

5 – 9.9 = 2 trees

10 – 14.9 = 3 trees

15 – 19.9 = 4 trees

20 – 24.5 = 5 trees

25+ = 6 trees

In the examples above, the American Holly is replaced with one tree, the Silver Maple with two trees, and the White Oak with five trees.

The formula should only be used by ISA certified arborists, with the knowledge of tree condition determinations and species factors.

Note: The examples below are for illustrating the application of the formula and do not necessarily represent an actual project.

6. PRACTICAL EXAMPLES

Example #1

Species Number Dia. (") Condition Species Rating

Total Score

Replacements

Maple 1 4* 1

Oak 1 12 .8 .7 6.72 2

Dogwood 1 6* 1

Sycamore 1 8* 1

Sycamore 1 30 .4 .7 8.40 2

Locust 2 6* 1(X2)

Locust 5 8* 1(X5)

Locust 1 10* 1

Locust 2 12 .4 .6 2.88 1(X2)

Locust 1 15 .4 .6 3.60 1

Ash 1 8* 1

Mulberry 1 4 1

In this example, 18 trees are lost (1173 caliper inches) and 20 trees replaced, since two of the trees being removed warrant greater than one-for-one replacements. However, a 36" Sycamore is also at risk; if it dies, it would be replaced with four trees:

Sycamore 1 36 .7 .7 17.64 4

*Trees 3”-10” DBH are automatically replaced at a rate of one for one, according to the policy.

Example #2

Species No. Dia. (") Condition Species Rating

Total Score

Replacements

Cedar 1 20 .5 .4 4.00 1

Cherry 1 18 .5 .4 3.60 1

Holly 1 4* 1

Linden 1 27 .8 .6 12.96 3

Ash 1 18 .7 .6 7.56 2

Ash 1 24 .7 .4 6.72 2

Am. Elm 1 15 .4 .6 3.60 1

Am. Elm 1 27 .4 .3 3.24 1

Am. Elm 1 27 .4 .3 3.24 1

Am. Elm 1 8* 1

Linden 1 21 .8 .6 10.08 3

In this example, 11 trees are lost (209 caliper inches) and 17 trees replaced, since four of the trees being removed warrant greater than one-for-one replacements. However, the trees listed below are also in the project area and considered to be at risk; if they die before construction is completed they would be replaced as follows:

White Pine 1 24 .4 .6 5.76 2

White Pine 1 16 .4 .6 3.84 1

Holly 1 20 .8 .8 12.80 3

Magnolia 1 10* 1

Maple 1 24 .7 .8 13.44 3

Magnolia 1 16 .7 .8 8.96 2

Crab 1 6* 1

*Trees 3”-10” DBH are automatically replaced at a rate of one for one, according to the policy.

ADDENDUM TO TREE REPLACEMENT GUIDELINES REVISION DATE: JANUARY 2010

D. Replacement Tree Types and Equivalents Large shade trees generally provide greater ecological benefit than do smaller ornamental trees. Therefore, the number of shade trees and ornamental trees proposed as replacement trees should be comparable to the number of trees that are to be removed from the site.

1. Replacement Value: One-for-One Basis One (1) new shade tree or large evergreen tree shall fulfill the replacement requirement of one (1) replacement tree per the tree replacement calculations.

2. Replacement Value: Three-to-One Basis

Three (3) deciduous ornamental or small evergreen trees shall fulfill the replacement requirement of one (1) replacement tree per the tree replacement calculations.

E. Tree Canopy Fund Any replacement trees that cannot be accommodated on site will be provided in a monetary amount: for every tree that cannot be planted on site a contribution to the County’s Tree Canopy Fund of at least $2,400.00 per tree will be provided to the Tree Canopy Fund coordinated with Arlington County’s Department of Parks, Recreation, and Cultural Resources.

PART 5 DESIGN GUIDELINES

Applicability:



Sector plans and studies provide information on streetscape elements. This part provides a list of sector plans and studies which may be obtained from CPHD, at 2100 Clarendon Boulevard, 703-228-3525.

Metro Corridor Sector Plans/Studies

The following documents are available from the Planning Division, Department of Community Planning, Housing, and Development, Suite 700, 2100 Clarendon Blvd., (703) 228-3525.

Current Plans and Studies

• Ballston Sector Plan • Ballston Sector Plan Summary • Clarendon Sector Plan (2006) • Court House Sector Plan Addendum • Crystal City Plan • East Clarendon - Special Coordinated Mixed Use District Plan • Fort Myer Heights North Plan • North Quincy Street Plan • Pentagon Centre Site Guiding Principles • Potomac Yards Design Guidelines • R-B Corridor - Streetscape Standards • Rosslyn to Courthouse Urban Design Study • Rosslyn Station Area Plan Addendum • Shirlington Design Book • Virginia Square Sector Plan • Virginia Square Sector Plan - Site Specific Guidelines

Historical Plans and Studies

• Court House Sector Plan • Court House Sector Plan Summary • Pentagon City Planning Task Force Report • R-B Corridor - Early Visions • R-B Corridor - Mid-Course Review • Rosslyn Transit Station Area Study

For updates to this list, checkhttp://www.arlingtonva.us/departments/CPHD/planning/docs/CPHDPlanningDocsMain.aspx

PART 6 INVASIVE SPECIES

Applicability:



Plants shown on Department of Conservation and Recreation’s Invasive Alien Plant Species of Virginia list should not be part of any plan, nor should any species shown in the Arlington County’s Department of Parks, Recreation, and Cultural Resources brochure “Terrestrial Invasive Plants of the Potomac River Watershed”.

September 2003 Key

SCIENTIFIC NAME COMMON NAME

M P C F P S H M X

Highly Invasive SpeciesAilanthus altissima Tree-of-heaven � � � � � �

Alliaria petiolata Garlic mustard � � � � � �

Alternanthera philoxeroides Alligator weed � � � �

Ampelopsis brevipedunculata Porcelain-berry � � � � �

Carex kobomugi Asiatic sand sedge � � � �

Celastrus orbiculata Oriental bittersweet � � � � � �

Centaurea dubia Short-fringed knapweed � � � � �

Centaurea biebersteinii Spotted knapweed � � � � � �

Cirsium arvense Canada thistle � � � � �

Dioscorea oppositifolia Chinese yam � � � � � �

Elaeagnus umbellata Autumn olive � � � � � �

Euonymus alata Winged burning bush � � � �

Hydrilla verticillata Hydrilla � � � �

Imperata cylindrica Cogon grass � � � �

Lespedeza cuneata Chinese lespedeza � � � �

Ligustrum sinense Chinese privet � � � � � �

Lonicera japonica Japanese honeysuckle � � � � � � �

Lonicera morrowii Morrow's honeysuckle � � � � � �

Lonicera standishii Standish's honeysuckle � � � � �

Lythrum salicaria Purple loosestrife � � � � � �

Microstegium vimineum Japanese stilt grass � � � � � � � �

H = HydricM = MesicX = Xeric

F = Full sunP = Part SunS = Shade

M = MountainsP = PiedmontC = Coastal

MOISTUREREGION LIGHT

Invasive Alien Plant Species of Virginia

Department of Conservation and RecreationDivision of Natural Heritage217 Governor StreetRichmond, Virginia 23219(804) 786-7951http://www.dcr.virginia.gov/natural_heritage/

Virginia Native Plant SocietyBlandy Experimental Farm

400 Blandy Farm Lane, Unit 2Boyce, Virginia 22620

(540) 837-1600http://www.vnps.org

September 2003 Key


M P C F P S H M X





Murdannia keisak Aneilema � � � � �

Myriophyllum aquaticum Parrot feather � � � � �

Myriophyllum spicatum European water-milfoil � � � � �

Phragmites australis Common reed � � � � � �

Polygonum cuspidatum Japanese knotweed � � � � � �

Polygonum perfoliatum Mile-a-minute � � � � �

Pueraria montana Kudzu vine � � � � � � �

Ranunculus ficaria Lesser celandine � � � �

Rosa multiflora Multiflora rose � � � � � �

Rubus phoenicolasius Wineberry � � � � � �

Sorghum halepense Johnson-grass � � � � � �

Acer platanoides Norway maple � � � � � �

Agropyron repens Quack grass � � � � � �

Agrostis tenuis Rhode Island bent-grass � � � � �

Akebia quinata Five-leaf akebia � � � � � �

Albizia julibrissin Mimosa � � � � � �

Allium vineale Wild onion � � � � � �

Artemisia vulgaris Mugwort � � � � � � �

Arthraxon hispidus Jointed grass � � � � � � � �

Arundo donax Giant reed � � � � � �

Berberis thunbergii Japanese barberry � � � � � � �

Carduus nutans Musk thistle � � � � �

Cassia obtusifolia Sickle pod � � � � � �

Centaurea jacea Brown knapweed � � � � � �

Cirsium vulgare Bull-thistle � � � � �

Convolvulus arvensis Field-bindweed � � � � � �

Dipsacus laciniatus Cut-leaf teasel � � �

Dipsacus sylvestris Common teasel � � � � � �

Egeria densa Brazilian water-weed � � � � � �

Euonymus fortunei Wintercreeper � � � � �

Highly Invasive Species - continued

Moderately Invasive Species

September 2003 Key


M P C F P S H M X





Festuca elatior (F. pratensis ) Tall fescue � � � � � �

Foeniculum vulgare Fennel � � � � � �

Glechoma hederacea Gill-over-the-ground � � � � � �

Hedera helix English ivy � � � � � �

Holcus lanatus Velvet-grass � � � � � � �

Humulus japonicus Japanese hops � � � � � � � �

Ipomoea hederacea Ivy-leaved morning-glory � � � � � � �

Ipomoea purpurea Common morning-glory � � � � �

Iris pseudacorus Yellow flag � � � � � �

Ligustrum obtusifolium Blunt-leaved privet � � � �

Lonicera maackii Amur honeysuckle � � � �

Lonicera tatarica Tartarian honeysuckle � � � � �

Lysimachia nummularia Moneywort � � � � � � � �

Melia azedarach China-berry � � � � �

Paulownia tomentosa Princess tree � � � � � �

Phleum pratense Timothy � � � � � �

Phyllostachys aurea Golden bamboo � � � � �

Poa compressa Canada bluegrass � � � � � � � �

Poa trivialis Rough bluegrass � � � � � � � �

Polygonum cespitosum Bristled knotweed � � � � � � � �

Populus alba White poplar � � � � � �

Rumex acetosella Red sorrel � � � � � �

Rumex crispus Curled dock � � � � �

Setaria faberi Giant foxtail � � � � �

Spiraea japonica Japanese spiraea � � � � � �

Stellaria media Common chickweed � � � � � � �

Veronica hederifolia Ivy-leaved speedwell � � � � � � �

Wisteria sinensis Chinese wisteria � � � � �

Xanthium strumarium Common cocklebur � � � � � � �

Moderately Invasive Species - continued

September 2003 Key


M P C F P S H M X





Agrostis gigantea Redtop � � � � � �

Ajuga reptans Bugleweed � � � � � � �

Arrhenatherum elatius Oatgrass � � � � � �

Commelina communis Common dayflower � � � � � �

Conium maculatum Poison hemlock � � � � � �

Coronilla varia Crown-vetch � � � � � �

Dactylis glomerata Orchard grass � � � � � �

Elaeagnus angustifolia Russian olive � � � � � �

Elaeagnus pungens Thorny elaeagnus � � � �

Eragrostis curvula Weeping lovegrass � � � � � �

Euphorbia esula Leafy spurge � � � � �

Ipomoea coccinea Red morning-glory � � � � �

Lapsana communis Nipplewort � � � �

Lespedeza bicolor Shrubby bushclover � � � � � �

Lonicera fragrantissima Sweet breath of spring � � � �

Lonicera x bella Bell's honeysuckle � � � � � �

Lotus corniculatus Birdsfoot trefoil � � � � � � �

Melilotus alba White sweet clover � � � � � �

Melilotus officinalis Yellow sweet clover � � � � � �

Miscanthus sinensis Silver grass � � � � � �

Morus alba White mulberry � � � � � �

Pastinaca sativa Wild parsnip � � � � � �

Perilla frutescens Beefsteak plant � � � � � �

Trapa natans Water chestnut � � � �

Ulmus pumila Siberian elm � � � �

Viburnum dilatatum Linden viburnum � � � �

Vinca minor & V. major Periwinkle � � � � � � �

Wisteria floribunda Japanese wisteria � � � �

Occasionally Invasive Species

About the List

This advisory list is published by Virginia Department of Conservation and Recreation

(VDCR) to inform land managers of potential risks associated with certain plant species

known to exhibit invasive behavior in some situations. The list is not regulatory in nature,

and thus does not prohibit the use of the plant species listed.

VDCR and Virginia Native Plant Society use detailed criteria to assess the invasiveness

of a plant. Factors used to rank each species include: cumulative impacts on natural areas;

impacts on other species; potential to disperse and invade natural landscapes; distribution

and abundance; and difficulty to manage.

Invasiveness Ranking

Highly invasive species exhibit the most invasive tendencies in natural areas and native

plant habitats. They may disrupt ecosystem processes and cause major alterations in plant

community composition and structure. They establish readily in natural systems and

spread rapidly.

Moderately invasive species may have minor influence on ecosystem processes, alter

plant community composition, and affect community structure in at least one layer. They

may become dominant in the understory layer without threatening all species found in the

community. These species usually require a minor disturbance to become established.

Occasionally invasive species generally do not affect ecosystem processes but may alter

plant community composition by outcompeting one or more native plant species. They

often establish in severely disturbed areas. The disturbance may be natural or human

origin, such as icestorm damage, windthrow, or road construction. These species spread

slowly or not at all from disturbed sites.

Regions

For the purpose of this list, the state has been divided into three regions: Coastal Plain,

Piedmont, and Mountains. The Coastal Plain and Piedmont regions follow conventional

physiographic province boundaries. The Mountain region combines the Blue Ridge,

Ridge and Valley, and Appalachian Plateau physiographic provinces.

Habitat Requirements

The categories for light and soil requirements are very broad and are only meant to give

general indication of habitat adaptations for these plants.

TerrestrialInvasive

Plants

ofthePotomacRiverWatershed

InyourownbackyardLearnabouttheplantsonyourproperty.Doyouhaveinvasiveplants?Dotheinvasiveplantsoverwhelmthenativeplants?Considerremovinginvasiveplantsfromyouryardandgarden,andreplacethemwithnon-invasiveandnativeplantsinyourlandscapedareas.Don’tfeellikeyouhavetodoitallatonce;removeandreplaceinvasiveplantsasyourtimeandbudgetallow.Everylittlebithelps.

VolunteeryourtimeLocalgroupsandparkmanagershostyear-roundvolunteerworkparties,soconsiderlendingafewhourstohelpprotectandrestoreyourfavoriteparksandnaturalareas.Removinginvasiveplantsisahealthyformofoutdoorexercisesuitableforallages,andit’srewardingwork.

Invasive plants are usually non-native species that have beenintroduced intentionally or byaccident and spread from humansettings into natural areas withnegative effects to our economy,environment or health. Free fromthe plant-eaters and parasites that

keep them in check in their nativeranges, they reproduce rapidly andspread aggressively, taking overnatural areas and altering biologicalcommunities. Invasive plants havebeen referred to as a form ofbiological pollution.

Manystates,countiesanduniversityextensionservicescanhelpyougathermoreinformation,andregionalnon-profitgroupsofferexcellentresourcesandposttheirvolunteeropportunities.Visittheseorganizationsonline:

Don’t purchase or transplant invasive plants. Ask plant sellers before you buy, tobe sure the plant you want is not invasive, and ask for alternatives if it is. Takethe “Recommended Landscape Alternatives to Invasive Plants” wallet guidefrom this brochure with you to your nurseries and show them some examples.

••The Nature Conservancy ofMD/DCwww.nature.org/maryland/invasives

•National Park Service www.nps.gov/plants/alien

•Mid-Atlantic Exotic Pest PlantCouncilwww.ma-eppc.org

•The Nature Conservancy’s GlobalInvasive Species Teamtncweeds.ucdavis.edu

•Maryland Native Plant Societywww.mdflora.org

•Virginia Native Plant Societywww.vnps.org

•USDA Invasive Species Informa-tion Centerwww.invasivespeciesinfo.gov

•Maryland DNR Invasive SpeciesResource Centerwww.dnr.state.md.us/invasives

•Virginia DCR Natural Heritagewww.dcr.virginia.gov/natural_heritage/invspinfo.shtml

•West Virginia DNR Wildlife Resourceswww.wvdnr.gov/Wildlife/InvasiveWV.shtm

Become an educated consumer

Seeds of invasive plants are well adapted to spreading and easily “hitch-hike” to new environments. Weed seeds can be carried in soil trapped inshoe or tire treads, in the soil of transplanted plants, in hay or straw usedto stop erosion or feed animals, or even on your pant legs. Please helpprevent new invasions by cleaning soil from your shoes and the tires ofvehicles that may be driven into natural areas.

Other types of invasiveorganisms in the area

For a start, unfold this brochure to the inside section, where you will learnhow to identify 10 of the most prevalent and problematic invasive plantsin our region and how to control them. You can also participate in plantwalks, weed control workdays, and invasive species trainings offered bylocal groups.

A variety of plants and animals hasinvaded our forests, fields and waters.

• Invasive aquatic plants likewater chestnut and giantsalvinia choke our lakes andponds, interfering with boatingand other recreation.

• Invasive animals like the snake-head fish and virile crayfishcompete with and displace na-tive species, harming the diver-sity and health of our rivers andstreams.

• Invasive insects like the emeraldash borer, Japanese beetle andhemlock woolly adelgid kill mil-lions of native trees each year.

Invasive species are one of the topthreats to our natural heritage,along with habitat loss anddegradation. Invasive plants candisplace native species, eliminatefood and habitat for wildlife, alternatural fire regimes and nutrientcycling in soils, and inhibit native-plant regeneration. In the U.S.alone, invasive species cost over$120 billion annually in damageand control, and the cost theyinflict on our natural heritage is

immeasurable. Whether you areacting as a steward for your ownproperty, a local park, or a far awaynatural area, invasive plants arelikely to be a problem. In the faceof such global threats tobiodiversity as habitat destructionand climate change, we can eachmake a difference by preventingand controlling the spread ofinvasive species.

Where to find more information

Learn how to identifyinvasive plants

What you can do...at home and in your parks

Why should you be concerned?

© 2008 The Nature ConservancyIllustrations by Rachel Rogge

What is an invasive plant? Spread the word, not the weed

This brochure produced through the dedication and cooperation of the following partners:

Landscape Alternatives to

InvasivePlants

of the Potomac River Watershed and

Surrounding Region

Recommended

To download this brochure or the“Recommended Landscape

Alternatives to Invasive Plants”wallet guide, please visit

nature.org/maryland

Garlic MustardAlliaria petiolata••Garlic mustard has a two-year life cycle, and one plant

can produce more than 7,000 seeds before dying. Theplants smother spring wildflowers and produce toxinsto prevent the growth of native plants.

•The leaves and habit of 1st and 2nd year plants are dif-ferent, but the scalloped-edge leaves, white

four-petaled flowers in the 2nd year, andbent white taproot are easy to identify.

•To remove, pull gently to dislodge the root,preferably when the soil is moist. Discard flow-ering and seeding plants with your garbage.

Japanese StiltgrassMicrostegium vimineum

•This annual grass shows up in the summer and rap-idly forms a dense monoculture along roads,woods and streams, choking out groundcov-ers and tree seedlings. Each plant canform 1,000 seeds.

•Stiltgrass leaves are divided into un-equal halves by a silvery line. Theplant gets its name from the above-ground roots that hold it up, likestilts on a boardwalk.

•Its shallow roots make stiltgrass easyto pull up. Remove several times eachsummer to encourage new seeds to growand thus exhaust the seed supply.

Japanese BarberryBerberis thunbergii

•This plant can form dense thickets and alters the pH, nitrogen and bio-logical activity levels in the soil,preventing native forest speciesfrom growing.

•The Japanese barberry’s spoon-shaped leaves have smooth edges, distinctive solitary spines by the budsand red berries that may persist through the winter.

•In natural areas, cut the plants close to the ground. In garden settings,pull or dig up plants, removing all root fragments to prevent regrowth.

Japanese HoneysuckleLonicera japonica

•This twining vine can strangle and overwhelm smalltrees, carpet forest floors and alter the structure of

a forest.•The evergreen leaves of Japanese honeysuckle growopposite one another, and the bark shreds off in longbrown and tan strips. Fragrant flowers emerge in thespring, and black berries may persistthrough the winter. •In natural areas, cut the vines

at the ground and again at eyelevel. Untwine the cutaway sec-

tion, and leave the remainder aboveto dry out and die.

Bush HoneysuckleLonicera maackii, L. morrowii, L. tartarica

•This bush forms dense thickets, competes with na-tive species for soil nutrients and casts dense shadefrom early spring to late fall, preventing the growthof species beneath.

•The bush honeysuckle’s leaves grow opposite oneanother, and the bark looks like it has been scratchedby a cat. Fragrant flowers emerge in the spring, andthe multi-branched shrubs can reach 20 feet in height.

Red berries persist through the fall intoearly winter.•In natural areas, cut the plants close to the

ground. In gardens, pull or dig up plants, removingall root fragments.

English IvyHedera helix•This evergreen vine can kill large trees,

or weigh them down to the point of collapse.On the ground, it can rapidly smother native

vegetation, even the toughest weeds.•English ivy leaves stay dark green year round,

but as the ivy climbs trees, its leaves changeshape and vines grow hairy. The vines produceblue-black berries in the fall.

•On trees, cut a section of vine near the base andpry from the tree to leave a gap. In gardens, pull ordig up all root fragments of groundcover.

Exotic WisteriaWisteria floribunda, W. sinensis

•This twining vine can strangleand overtop tall trees, carpetforest floors, and alter the

structure of a forest.•Wisteria’s crinkled leaves

are composed of manysmall leaflets (compound),and the bark is gray andtightly stretched. Short-livedfragrant purple flowers emerge inearly summer and yield long fuzzy seed pods.

•In natural areas, cut the vines at the ground and again at eye level. Untwine the cutaway section, and leave the remainder above to dryout and die.

WineberryRubus phoenicolasius

•This bush can form densethickets and displaces nativeplants that provide food and shelter for birds andmammals.

•Wineberry leaves are comprisedof three leaflets—the middle onelarger than the other two—and theunderside of the leaves is white.Arching stems with red hairs and redthorns and red fruit in summer are distinctive.

•In natural areas, cut the plants close to the ground and cut rooting tips. In gardens, pull or dig up plants, removing all root fragments to prevent regrowth.

Oriental BittersweetCelastrus orbiculatus

•This twining vine can strangle and overtop talltrees, form dense thickets, and alter the

structure of a forest.•The glossy leaves have small teeth, and

leaf tips are rounded, or may narrow to apoint. Young vines have small white dots and verysharp buds. Older bark is rough and furrowed.

•In natural areas, cut the vines at the ground andagain at eye level. Untwine the cutaway section, and

leave the remainder above to dry out and die.

Multiflora RoseRosa multiflora

•This bush crowds out native vegetation, de-pletes soil nutrients, climbs trees, and

displaces the native plants that pro-vide food and shelter for birds and

mammals.•The toothed leaves of multiflora rosehave bases that resemble eyelashes. Curved thorns,white flowers in early summer and red fruits inthe fall are distinctive features..•In natural areas, cut stems of the plants close tothe ground and cut rooting tips. In gardens, pullor dig up plants, removing all root fragments.

Non-Invasive

TreesAsim

inatriloba—

PawPaw

Acerrubrum

—R

edm

apleAmelanchierlaevis—

ServiceberryCeltis

occidentalis—C

omm

onhackberry

Cercis

canadensis—Eastern

redbudCham

aecyparisspp.—

FalsecypressChionanthus

virginicus—Fringetree

Fagussylvatica—

Am

ericanbeech

Frankliniaalatam

aha—Franklinia

Halesia

carolina—C

arolinasilverbell

Ilexopaca—

Am

ericanholly

Liquidambarstyraciflua—

Sweetgum

Magnolia

grandiflora—Southern

magnolia

Nyssa

sylvatica—B

lackgum

Ostrya

virginiana—Ironw

oodPicea

pungens—C

oloradospruce

Platanusoccidentalis—

Am

ericansycam

oreQuercus

alba—W

hiteoak

Quercus

palustris—Pin

oakQuercus

phellos—W

illowoak

Thujaoccidentalis—

Arborvitae

Non-Invasive

Shrubs

Amelanchiercanadensis—

ShadbushAronia

arbutifolia—R

edchokeberry

Calycanthus

floridus—C

arolinaallspice

Cam

elliajaponica—

Japanesecam

elliaClethra

alnifolia—Sw

eetpepperbushCornus

sericea—R

ed-osierdogwood

Corylus

americana—

Hazelnut

Daphne

xburkw

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urkwood

daphneFothergilla

gardenii—D

warffothergilla

Ham

amelis

spp.—W

itchhazel

Hydrangea

spp.—H

ydrangeaIlex

glabra—Inkberry

Ilexverticillata—

Com

mon

winterberry

Iteavirginica—

Virginiasw

eetspirePhysocarpus

opulifolius—N

inebarkPrunus

laurocerasus—C

herrylaurel

Syringameyeri—

Meyerlilac

Vacciniumspp.—

Blueberry

Viburnumdentatum

—A

rroww

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Treeofheaven

Bam

busa—Exotic

bamboo

Berberis

thunbergii—Japanese

barberryBuddleia

davidii—B

utterflybush

Eleagnusspp.—

Autum

nolive

Euonymous

alatus—B

urningbush

Ligustrumspp.—

PrivetLonicera

spp.—B

ushhoneysuckle

Nandina

domestica—

Heavenly

bamboo

Paulownia

tomentosa—

Empress

treePhyllostachys

aurea—G

oldenbam

booPrunus

subhirtella—H

igancherry

Pyruscalleryana—

Callery

pearQuercus

acutissima—

Sawtooth

oakSpirea

japonica—Japanese

spireaUlmus

parvifolia—C

hineseelm

Viburnumdilatatum

—Linden

viburnumViburnum

plicatum—

Doublefile

viburnumViburnum

sieboldii—Siebold

viburnum

Non-Invasive

PerennialsAsterdivaricatus—

White

wood

asterBaptisia

australis—B

luefalse

indigoCoreopsis

spp.—Tickseed

Echinaceapurpurea—

Easternpurple

coneflower

Eupatoriumspp.—

Joe-pyew

eedHeuchera

spp.—C

oralberryIris

versicolor—B

lueflag

irisLobelia

cardinalis—C

ardinalflower

Monarda

spp.—B

eebalmRudbeckia

hirta—B

lack-eyedSusan

Sedum‘Autum

nJoy’—

StonecropSolidago

spp.—G

oldenrodTiarella

spp.—Foam

flower

Non-Invasive

Grasses

andS

edgesCalam

agrostisxacutiflora

‘KarlFoerster’—Featherreed

grassCarex

albursina—W

hitebearsedge

Carex

pennsylvanica—Early

sedgePanicum

virgatum—

Switchgrass

Schizachyriumscoparium

—Little

bluestem

Non-Invasive

Vines

Aristolochia

macrophylla—

Dutchm

an'spipe

Bignonia

capreolata—C

rossvineCam

psisradicans—

Trumpetcreeper

Hydrangea

anomala

petiolaris—C

limbing

hydrangeaLonicera

sempervirens—

Native

honey-suckleParthenocissus

quinquefolia—Virginia

creeperWisteria

frutescens—A

merican

wisteria

Non-Invasive

Groundcovers

Asterericoides—

Heath

asterAthyrium

filix—fem

ina—Lady

fernChrysogonum

virginianum—

Green-and-

goldErica

carnea—Spring

heathJuniperis

horizontalis—C

reepingjuniper

Phloxstolonifera—

Creeping

phloxPhlox

subulata—M

ossphlox

Rudbeckia

fulgida'Goldstrum

'—G

oldenconeflow

er

PART 7 FORMS

Applicability:



The Landscape Plan Review Application (obtained from the Zoning Office) should accompany all landscape plan submissions. The checklist is an internal document, used by Arlington County staff when reviewing landscape plans and tree protection plans and is provided here as a reference.

Landscape Plan Review Checklist Page 1 of 4

Project:

Reviewers:

Date:

1. Plans are stamped by Zoning.

2. Project Type (Site Plan, Use Permit, By-Right, etc) and Number (if applicable)

3. Basic drawing conventions are included:North arrow

Scale

Street names

Vicinity map

Address

Topography at min. 2'-0" is shown.

Finished first floor elevation of all structures is labeled.

Top-of-slab elevation of any underground structure is labeled.

Limits of any underground structure is shown.

Limit(s) of demolition/work.

3. Arlington County Details R-7.0, 7.1, 7.2, 7.4, 7.6, 7.6A, 7.7, 7.9A, 7.9B, 7.9C, if applicable.

Planting Specifications

Urban Forester notification included in Specifications

Planting Notes

Maintenance Management Program

4. Plant List

Includes spacing for shrubs and ground cover plants.

Free of any invasive alien plants.

CPHD Planner:

Arlington County, Virginia DCPHD01.2010


5a. Plant Material

Species and number are called out on plan.

Caliper, height or spread agrees with Site Plan Conditions.

New lawn and mulch areas are labeled.

5b. Street Trees

Species agrees with Site Plan Conditions.

Species agrees with sector plan, if applicable.

Caliper agrees with Site Plan Conditions.

Tree pits or strips agree with County Standards and/or Site Plan Conditions.

Provides irrigation for all street trees.

Rootball will fit into planting space (See ANLA for formula/guidelines).

Spacing is min. 25'-0" and max. 45'-0", or as specified in Site Plan Conditions.

Structure-free zones provided.

Drainage for street trees

Drainage within pits is shown and labeled on plan.

Invert-in and -out shown on all tree pit drainage lines (min 2% slope towards drainage connection).

Drainage connects to storm drain facility that is more than 5'-0" deep.

or Drainage connects to building/garage drainage system. Connections are labeled and described.

or Drainage connects to sump pit. Includes Arlington County Detail 7.6A, invert-in/out are labeled.

Root enhancement for street trees

Root paths located and labeled on plan, and detail provided.

or Suspended sidewalk or continuous soil panel located and labeled on plan, and detail provided.

or Structural soils located and labeled on plan, and detail provided.

or Structural cells located and labeled on the plan, and details provided.



6. Utilities

sewer; stormwater; electric; gas; water; telephone; cable; fiber optics

comments

7. Equipment (See item 8 for street lighting items.)

traffic signal poles and control boxes; utility meters, vaults and boxes; ventilation shafts and grates; transformers, including pads, fire hydrants; standpipes; storm water detention facilities; parking meters; other mechanical equipment, either above OR below grade

comments

8. Lighting

Street lights locations are shown.Street light conduit is shown at back of curb, in either plan or detail.Street light details, including style, provided.Parking lighting is labeled on plan and detail provided.Interior lighting is labeled on plan and detail provided.Electrical outlet placement provided (if applicable).

comments

9. Hardscape (locations, dimensions, materials and color(s) and pattern(s))

public sidewalks, interior sidewalks, plazas, driveways, driveway aprons, service drives, parking areas, crosswalks

comments



10. Furnishings (locations, dimensions, materials and color(s) and pattern(s))

planters, fountains, benches, bike racks, fencing, signage, trash/ash receptacles, recreation equipment, sculpture, transit shelters

comments

11. Conditions for public art have been met.

12. Any public easements have been located and labeled on the plan.

13. Provides Chesapeake Bay analysis and calculations for tree canopy coverage.

14. According to the Zoning Ordinance, a minimum of 25% of the landscape areas shall be shrubspread at maturity (See Arlington County Zoning Code 32A.A.2c.). Provides calculations.

NOTE: Resubmitted revised plans must include a written statement addressing each outstanding issue.

No. Comments


Tree Protection and Preservation Plan Review Checklist Page 1 of 2

Project:

Reviewers:

Date:

1. Plans are stamped by Zoning.

2. Project Type (Site Plan, Use Permit, By-Right, etc) and Number (if applicable)

3. Basic drawing conventions are included:

North arrow

Scale

Street names

Vicinity map

Address

Topography at min. 2'-0" is shown.

Finished first floor elevation of all structures is labeled.

Top-of-slab elevation of any underground structure is labeled.

Limits of any underground structure is shown.

4.Locates and identifies all trees 3" in caliper and larger within all areas of clearing and grading as shown on the final site development plan. Includes any tree on adjacent properties whose critical root zone extends onto the subject site (subject to notification).

5. Identifies existing trees:

That will be removed.

That are to be saved.

6. Developed by an ISA certified arborist with demonstrated expertise in tree preservation techniques on urban sites.

CPHD Planner:


Tree Protection and Preservation Plan Review Checklist Page 2 of 2

7. Includes detailed specifications for any tree walls or wells proposed.

8. Designates how and where building materials and equipment will be stored during construction to ensure that no compaction occurs within the dripline of the trees to be saved.

9. Identifies of tree protection measures and delineation of placement of tree protection throughout the entire site in relation to all phases of construction.

10. Provides Arlington County Tree Protection Fence details.

11. Provides Tree Preservation Area Sign detail.

12. Provides Chesapeake Bay analysis and calculations.

No. Comments


PART 8 RECOMMENDED TREES

Applicability:


Use-permits County/School projects

The trees listed here are recommended for planting in Arlington County. However, other trees may be proposed by an applicant for approval by the Zoning Administrator or County Manager or his/her designee.

ARLINGTON COUNTY RECOMMENDED SHADE TREES

Scientific Name Common Name Recommended Varieties Comments

Acer rubrum Red Maple 'October Glory', 'Red Sunset' 50' x 50', showy fall color

Acer saccharum Sugar Maple 'Bonfire', 'Commemoration', 'Legacy' intolerant of salt

Celtis laevigata Sugar Hackberry 'Magnifica' 70' x 70'

Celtis occidentalis Common Hackberry 'Prairie Pride' 50' x 50'Cercidiphyllum japonicum Katsuratree 50' x 50'

Ginko biloba Ginko 'Autumn Gold'50' x 35', Male only, showy fall color

Gleditsia triacanthos Honeylocust 'Shademaster', 65' x 55', showy fall color

Liquidambar styraciflua Sweetgum 'Rotundifolia' 70' x 60', Only fruitless variety

Nyssa sylvatica Blackgum 55' x 40', showy fall color

Plantanus x acerifolia London Planetree 'Bloodgood' 80' x 65', showy bark

Quercus bicolor Swamp White Oak 60' x 60'

Querce coccinea Scarlet Oak 70' x 45'

Quercus imbricaria Shingle Oak 60' x 60'

Quercus macrocarpa Bur Oak 75' x 75'

Quercus palustrus Pin Oak 65' x 45'

Quercus phellos Willow Oak 65' x 55'

Quercus rubra Northern Red Oak 70' x 60'

Quercus shumardii Shumard Oak 70' x 60'

Sophora japonica Scholartree 'Regent' 60' x 60'

Taxodium distichum Baldcypress 60' x 25'

Tilia americana American Linden 70' x 45'

Tilia cordata Littleleaf Linden 'Greenspire' 65' x 45'

Tilia tomentosa Silver Linden 'Green Mountain' 60' x 50'

Ulmus americana American Elm 'Valley Forge', 'Liberty' 70' x 55'

Ulmus parvifolia Lacebark Elm 'Allee', 'Central park splendor' 70' x 60', showy bark

Zelkova serrata Japanese Zelkova 'Green Vase', 'Village Green' 65' x 55'

ARLINGTON COUNTY RECOMMENDED EVERGREEN TREES


Cedrus deodora Deodar Cedar

Ilex x attenuata 'Fosteri' Foster Holly 'Fosteri' Only 20 to 25 ft. tall & narrow

Ilex x 'Nellie R. Stevens' Nellie Stevens Holly

Ilex opaca American Holly

Juniperus virginiana Red Cedar

Pinus nigra Austrian Pine

Picea omorika Serbian Spruce Narrow growth form

ARLINGTON COUNTY RECOMMENDED COLUMNAR TREES


Acer Rubrum Red Maple 'Armstrong', 'Bowhall'Quercus Robur Engish Oak 'Attention', 'Fastigiata', 'Skymaster'Carpinus Betulus European Hornbeam 'Fastigiata'

ARLINGTON COUNTY RECOMMENDED TREESFOR PLANTING UNDER OVERHEAD WIRES


Acer buergerianum Trident Maple multi-stem, 25' x 25

Acer campestre Hedge Maple multi-stem, 30' x 30'

Acer ginnala Amur Maple 'Flame'multi-stem, 20' x 20', showy fall color

Acer griseum Paperbark Maple 25' x 25', showy bark

Aesculus pavia Red Buckeyemulti-stem, 20' x 20', spring flowering

Aesculus x carnea Red Horsechestnut 'Brioti', 'Fort McNair' 35' x 35', spring flowering

Amelancier x grandiflora Hybrid Serviceberry 'Autumn Brillance'multi-stem, 25' x 25', spring flowering

Betula nigra River Birch 'Dura-Heat', 'Hertitage'multi-stem, 40' x 40', showy bark

Carpinus caroliniana American Hornbeam 25' x 25'

Cercis canadensis Eastern Redbud 'Forest Pansy' 25' x 30', spring flowering

Chionanthus retusus Chinese Fringetreemulti-stem, 20' x 20', spring flowering

Chionanthus virginicus White Fringetreemulti-stem, 20' x 20', spring flowering

Cladrastis kentukea (lutea) American Yellowwood40' x 50', spring flowering, showy fall color

Crataegus crusgalli Cockspur Hawthornvar. inermis, 25' x 25', spring flowering, fall berries

Lagastromia indica Crapemyrtle

'Biloxi', 'Comanche', 'Miami', 'Natchez', 'Tuscarora', 'Yuma', 'Catawba',' Sioux'

multi-stem, 25' x 25', summer flowering, showy bark

Magnolia 'Galaxy' Hybrid Magnolia 25' x 15', spring flowering

Magnolia stellata Star Magnoliamulti stem, 20' x 15', spring flowering

Magnolia virginia Southern Magnolia

Malus sp. Flowering Crabapple 'Coronaria', 'Angustifolia'20' x 20', spring flowering, fall fruit

Ostrya virginiana American Hophornbeam 35' x 25', hard to find.

Oxydendrum arboreum Sourwood30' x 20', summer flowering, showy fall color

Prunus 'Okame' Okame Cherry 25' x 25', spring flowering

Prunus x yedoensis Yoshino Cherry 'Akebono' 25' x25', spring flowering

Syringa reticulata Japanese Tree Lilac 'Ivory Silk' 25' x 20', summer flowering

PART 9 TREE APPRAISAL POLICY

Applicability:



The Tree Appraisal Policy was adopted by the Arlington County Board to assist in establishing appropriate bonding for mature trees.

TREE APPRAISAL POLICY October 21, 2004

1) TITLE This document shall be known as the Arlington County Tree Appraisal Policy. 2) FINDINGS The preservation of Arlington County's trees and tree canopy coverage has been identified as a top priority by the County Board and citizens. Mature trees are frequently threatened by new construction. 3) PURPOSE AND INTENT These guidelines provide methods for appraising trees to determine the appropriate bond amount to ensure the preservation of specific trees. 4) DEFINITIONS Terms used herein are defined by Arlington County Trees and Shrubs Ordinance, Arlington County Code 67-1-3, and The Ninth Edition of Guide for Plant Appraisals, authored by the Council of Tree and Landscape Appraisers. 5) APPLICABILITY This policy shall apply to 4.1 Approved Site Plans and Unified Residential Developments where trees are to be preserved. 6) TREE PRESERVATION PLAN The developer shall prepare a tree preservation plan which shows existing site conditions, including existing structures and grades, and identifies all trees to be preserved, including any tree on adjacent sites whose dripline extends onto the subject site. The tree preservation plan shall be prepared in accordance with Arlington County Standards for Planting and Preservation of Trees on Site Plan Projects. For example, tree protection measures, e.g., fencing location(s), must be identified on the plan and the appropriate details, e.g., Determination of Critical Root Zone Detail R-7.7 and Typical Signage for Tree Preservation Area, must be included in the drawing set. The tree preservation plan shall be developed by a certified arborist or other horticultural professional with a demonstrated expertise in tree protection techniques on urban sites, in accordance with Arlington County Tree Replacement Guidelines. 7) TREE APPRAISAL APPROACHES The Cost Approach Method as described in The Ninth Edition of Guide for Plant Appraisals, authored by the Council of Tree and Landscape Appraisers (CTLA) shall be utilized for appraising trees.

The bond posted for a tree shall be (1) equal to the appraised value of the tree as determined by either (a) Replacement Cost Method or (b) Trunk Formula Method, PLUS (2) compounded expected annual maintenance costs.

a) Replacement Cost Method This method shall be applied to trees up to and including 8" DBH.

Appraised Value = [installed plant cost x species value x condition value x location value] + removal and cleanup cost] b) Trunk Formula Method This method shall be applied to trees greater than 8" DBH.

Appraised Value = basic tree cost x species value x condition value x location value

c) Compounded Annual Maintenance Cost for Replacement Plants When a replacement plant will require several years before it regains precasualty size and condition (parity), compounded annual maintenance costs shall be added to the value derived from either Replacement Cost or Trunk Formula Cost.

Compounded Annual Maintenance Cost =

sum of [maintenance cost x annual compound interest factor] for each of the years that the maintenance cost will be the same until parity is reached

Interest rate shall be based upon the Prime Rate as set by the Federal Reserve Board plus

four (4) percent. See Guide, Appendix 1, Table I.1, "Annual Interest Rates Compounded."

d) Market Approach For large wooded areas on a property, use of the Cost Approach for each tree at risk from construction may not be appropriate since individual trees are not providing amenity value alone but rather the stand of trees as a whole are providing value. In these cases, the Market Approach (or Sales Comparison Approach) may be more appropriate. In circumstances where the total dollar value of the trees (in the entire stand of trees) is determined using the Cost Approach Method to be inequitable in terms of the relative value of the trees to the value of the site, the County Urban Forester may delineate a “critical development impact area,” and/or significant trees that would be at risk during construction. In such cases, the County Manager may recommend a bond amount that would adequately reflect the value of trees identified by the Urban Forester to be at risk. The developer shall submit the above information in tabular format for each tree appraised. 8) PERFORMANCE Upon approval of the tree preservation plan, the developer shall submit a performance bond estimate for the appraised value of all trees to be preserved to the Department of Community Planning, Housing and Development for review and approval. Upon approval of the performance bond estimate by the Department of Community Planning, Housing and Development, the developer shall submit a performance bond in the approved amount of the estimate and agreement for the appraised value of all trees to be preserved to the Department of Public Works. This bond shall be executed by the developer in favor of the County before the issuance of the Clearing,

Grading and Demolition Permit. This policy shall be incorporated by reference in to the performance bond. 9) PENALTY FOR VIOLATION Failure of any party to follow the procedures as required by this section shall constitute grounds for withholding or revoking demolition and/or construction permits, occupancy permits or any other appropriate approvals necessary to continue development. The developer shall forfeit the proportionate amount of the bond for any tree or trees to be preserved that fail within two years of issuance of the final certificate of occupancy. Assessment of tree failure shall be the sole determination of the County Urban Forester. 10) ENFORCEMENT The Zoning Administrator shall be charged with the responsibility for the enforcement of this policy and may serve legal notice to any person in violation thereof or institute legal proceedings as may be required, and the County Attorney is hereby authorized to institute appropriate proceedings to that end. 11) REFERENCES All references are available for review at Arlington County Government Reference Library, 2100 Courthouse Road, Suite 406. The Ninth Edition of Guide for Plant Appraisals, Council of Tree & Landscape Appraisers (published by International Society of Arboriculture, Champaign, IL) Workbook, Guide for Plant Appraisal, Council of Tree & Landscape Appraisers (published by International Society of Arboriculture, Champaign, IL) Mid-Atlantic Tree Species Rating Guide, Mid-Atlantic Chapter, ISA (published by Mid-Atlantic Chapter, ISA, Rockville, MD)

PART 10 MISCELLANEOUS DETAILS

Applicability:

By-right Site plan projects

Use permit URD

Details R-7.3, R-7.5 and R-7.8 provide guidance for special situations. For details, see link below: http://www.arlingtonva.us/departments/CPHD/planning/docs/CPHDPlanningDocsLandscapeDocs.aspx

1-cover letter-director cphd · (1) topography of site before and after landscaping. (2) location...

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