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KINGSTON LID STORMWATER RETROFIT LID RETROFIT IMPLEMENTATION PLAN

Prepared for:

Kitsap County Public Works

Surface and Stormwater Management (SSWM) 614 Division Street (MS‐26A) Port Orchard, WA 98366

December, 2012

Prepared by:

Table of Contents

1.0 Introduction ...................................................................................................................................... 1

1.1 Kingston Background Information ..................................................................................................... 1

1.2 Study Area .......................................................................................................................................... 1

1.3 Goals of Retrofit Study ....................................................................................................................... 3

2.0 Methods ............................................................................................................................................ 4

2.1 Determine the Study Boundary ......................................................................................................... 5

2.2 Study the Existing Infrastructure within the Study Boundary ........................................................... 5

2.2.1 2009 Downtown Kingston Master Plan ...................................................................................... 5

2.2.2 Miller Bay Road Corridor Project: Downtown Kingston ............................................................. 5

2.2.3 2006 Port of Kingston Master Plan ............................................................................................. 6

2.2.4 Kitsap County’s Low Impact Development (LID) Guidance Manual ........................................... 6

2.3 Identify Potential LID Best Management Practices (BMPs) ............................................................... 6

2.3.1 Bioretention (raingardens) .......................................................................................................... 6

2.3.2 Pervious Pavement ..................................................................................................................... 7

2.3.3 Skinny Streets .............................................................................................................................. 7

2.3.4 Cisterns ........................................................................................................................................ 7

2.3.5 Amended Soil .............................................................................................................................. 8

2.4 Evaluate Site Suitability in the Study Area through Field Investigation ............................................. 8

2.5 Compile Data .................................................................................................................................... 11

2.6 Evaluate Potential Retrofits ............................................................................................................. 11

3.0 Approach for Preliminary Retrofit Designs .......................................................................................... 13

3.1 Street Sections ................................................................................................................................. 13

3.2 Parking Lot Retrofits ......................................................................................................................... 13

3.3 Site Specific Retrofits ....................................................................................................................... 13

4.0 Other Considerations ........................................................................................................................... 14

4.1 Additional Site Evaluations .............................................................................................................. 14

5.0 Summary .............................................................................................................................................. 14

List of Figures

Figure 1: Project Limits and Areas of Primary Interest (API) ....................................................................... 2

Figure 2: Preliminary Retrofit Locations Identified by Stakeholders ......................................................... 10

Figure 3: Locations of Prioritized Retrofits ................................................................................................ 12

Appendices

Appendix A .................................................................................................................. Retrofit Project Sheets

Appendix B ........................................................................................................... Preliminary Cost Estimates

Appendix C ......................................................................................................... Site Assessment Field Notes

Appendix D .................................................................................................................. Prioritization Matrices

Kingston LID Stormwater Retrofit Plan Page 1 2020 ENGINEERING December 2012

1.0 Introduction Kitsap County is a unique area located between Puget Sound and Hood Canal. Over the years as more and more people have discovered this diverse area, growth in population, development, traffic, and industry have impacted the surrounding ecosystem. Kitsap County has prioritized stormwater management improvements as a critical path to restoring the County’s valuable natural resources and habitat.

1.1 Kingston Background Information Located along the shores of Apple Tree Cove, Kingston was founded in 1853 by Benjamin Bannister as a lumber town. With passenger ferry service starting in the 1920’s, and vehicle ferry service as early as 1923, Kingston quickly became a sought after destination for Seattle residents among others. Today the ‘Little City by the Sea’ has grown to a population of over 2000 full time residents.

Kingston is one of the most urbanized town centers in Kitsap County with approximately 65% impervious surface area. A majority of the development is commercial and high‐density residential land use. The Kingston town center, along with a moderately developed shoreline, borders Puget Sound. Kingston also includes a major Washington State Ferry Terminal and associated traffic issues. The high average daily traffic (ADT) makes this a significant source of road runoff and stormwater pollution.

The community values the natural resources and shoreline parks. Additionally, the business community has been responsive to the water quality and natural resource protection messages of the last few years, as demonstrated by their compliance with storm maintenance requests, and is receptive to changing management practices to reduce polluted runoff.

Past Master Planning efforts for Kingston have worked to create a clear plan for future growth and revitalization, as well as identified needs for further study. This LID Stormwater Retrofit Study is intended to compliment past efforts with a focus on stormwater quality and quantity recommendations within the core of the Kingston area.

1.2 Study Area The area evaluated in this study is approximately 157 acres, as shown on Figure 1. The study area was broken into five areas of primary interest (API’s) based on both location and land use. The five API’s evaluated are listed below along with their main land use category:

1. Downtown Core – Medium Density Mixed Use 2. Village Green – Low Density Mixed Use 3. SR 104 Corridor – Medium Density Commercial 4. Lindvog Road NE – Low Density Commercial 5. East Side – Medium Density Residential


Figure 1: Project Limits and Areas of Primary Interest (API)

N


1.3 Goals of Retrofit Study This study is intended to compliment both the Kingston Downtown Master Plan, as well as the Kingston Commons planning and design processes which overlap this project timeline. This study is intended to identify, characterize, and prioritize Low Impact Development (LID) stormwater retrofit opportunities and needs on both public and private property. By developing concept level designs for the identified projects, this study will be used for property‐owner education and to pursue funding for future implementation of the identified projects. The results of this study may serve as guidelines for planning future projects, and to communicate project opportunities with the public and private commercial property owners.

By including community stakeholders in the identification and prioritization process, those involved will have a better understanding of the local hydrology, and what can be done to improve the current conditions of the stormwater system that serves the Kingston area.

This report is intended to serve as a guide for similar efforts in other areas of Kitsap County to aide in the process of studying, identifying, prioritizing, and designing stormwater retrofits.


2.0 Methods Following past efforts to develop the Downtown Kingston Master Plan, the LID Stormwater Retrofit Plan included engineering assessment, community and stakeholder involvement, and coordination between County departments, as well as coordination with other planning efforts such as the Miller Bay Road Corridor Project in order to identify, evaluate, and prioritize potential retrofits. Similar to other retrofit evaluations that have been undertaken throughout Western Washington, a step‐by‐step approach included:

1. Determine the Study Boundary a. Identify the geographic area, and determine boundaries based on topography, land use,

and hydrology. 2. Study the existing stormwater infrastructure within the Study Boundary

a. Identify areas without infrastructure improvements, or without adequate infrastructure through GIS mapping, aerial photography, as‐built drawings, and previous studies.

3. Identify potential LID best management practices (BMPs) 4. Evaluate site suitability in the Study Area through field investigation

a. Identify areas of significant concern i. Erosion, flooding, critical areas ii. Extensive areas of impervious surfaces, or with high pollutant potential iii. Failing or inadequate infrastructure

b. Identify areas of opportunity i. Drainage convergences ii. Areas planned for other infrastructure improvements (i.e. pavement

replacement, water or sewer main replacement, bicycle lane or sidewalk improvements, etc.)

iii. Public or private unplanned green space iv. Opportunities to restore vegetated buffers, habitat, soil, or other environmental

constituents with dual purpose landscape features. c. Talk with community members

i. Collect anecdotal data about historic hydrologic problems or concerns ii. Collect anecdotal data about the effects of changes in land use or topography iii. Review County complaints related to drainage, flooding, or erosion.

5. Compile data a. Create a list of potential locations for retrofits b. Match potential locations with potential BMPs c. Identify potential prioritization criteria including environmental, economic, and social

components 6. Evaluate potential retrofits

a. Involve community stakeholders and County staff to refine identified project locations, BMPs, and prioritization criteria

b. Estimate potential costs


2.1 Determine the Study Boundary When evaluating a geographic area of study for stormwater management, the boundaries of the study area should be determined based on topography, land‐use, hydrology, environmental protection areas, and plans for future growth or development.

2.2 Study the Existing Infrastructure within the Study Boundary Review existing storm drain collection mapping to determine general stormwater flows, and identify areas of drainage convergence, areas with some of the oldest infrastructure, and areas that may have no formal drainage infrastructure at all. Review other studies and reports prepared for the area, and understand the objectives and findings in relation to stormwater. Proposed improvements in other studies may not appear to be directly stormwater related, but their location may lend well to improve stormwater management. For example, while bike lanes may be proposed for a variety of transportation or community planning reasons, their location alongside the vehicular lane of travel on the road and their relatively low traffic wear lends well to pervious pavement facilities. Sidewalk improvement projects are another convenient opportunity for stormwater management integration.

2.2.1 2009 Downtown Kingston Master Plan The purpose of the Master Plan was to facilitate downtown revitalization, improving Kingston’s overall quality of life through an improved built environment and economic development. Its scope intended to describe desired development, amend policies and development regulations, and facilitate financing mechanisms. County staff was directed to further analyze assumptions built into proposed policy amendments and incorporate a more holistic approach to streetscape improvements with respect to parking, stormwater management, and financing. It was discussed that “Current stormwater management requirements stymies desired development due to lot configurations and expected development.” The Master Plan identified the following LID Objectives: Streetscape Study, Community Stormwater Plan, Establishment of LID/CRID, and to pursue grant funding. The Downtown Master Plan provides the community’s goals for the time frame extending to 2025 and is conceptual in nature.

Information from this Master Plan was used to understand and learn from the economic development efforts and considerations, parking concerns, and overall community vision and priorities.

2.2.2 Miller Bay Road Corridor Project: Downtown Kingston The Miller Bay Road Corridor Project addresses the circulation component of the Downtown Master Plan in more detail, and establishes guidelines for a “Complete Streets” approach for the public rights of way in the downtown. This project also looks at the feasibility of specific circulation revisions in the downtown associated with traffic accessing the ferry including transit, bicycle and pedestrian access improvements.

Information from this study was incorporated to envision what the future traffic (including vehicular, pedestrian, and bicycle) patterns may look like surrounding the ferry terminal and the intersection


where the current community center is located. This knowledge and understanding helped to identify areas for retrofit opportunities, as well as to plan for those areas that may soon be altered.

The team working on this report is also working closely with the County Roads Department, and Washington State Department of Transportation in coordination for the traffic revisions planned for ferry traffic. With the knowledge of these future improvements, for the purposes of Kingston LID Stormwater Retrofit Plan it is assumed that Main Street will return to 2‐way local traffic rather than the current 1‐way ferry queue. It is also assumed that SR 104 will be modified to allow for all traffic loading and unloading from the ferry.

2.2.3 2006 Port of Kingston Master Plan This study is a facilities plan, with documented goals and priorities to guide the future development of improved or new Port structures and other physical facilities. This plan identified the then current facilities of the Port along with facilities that would further enhance the value of the Port to the Community. The Port’s Master Plan identified short‐, medium‐, and long‐term goals under the categories of park, marina, parking, and commercial development.

Information from this study was used to understand the Port and community’s priorities for parking improvements, future commercial development, marina improvements, etc.

2.2.4 Kitsap County’s Low Impact Development (LID) Guidance Manual The purpose of the LID Guidance Manual is to make LID accessible for all designers, developers, and builders in Kitsap County. The LID goals are to protect water quality, preserve wetland and stream functions, encourage aquifer recharge where appropriate, and to provide cost‐effective stormwater management solutions. This Manual provides site assessment and planning guidance and procedures, guidance on integrated design, design and flow modeling guidance and standards for a variety of BMPs.

Information from this manual was used for consistency between documents, as well as guidance for assessing the feasibility of potential sites for retrofits and design guidance for specific BMPs.

2.3 Identify Potential LID Best Management Practices (BMPs) Creating a menu of LID BMPs aids in determining which BMP may be most appropriate for a particular location or need. LID BMPs considered in this evaluation are summarized below.

2.3.1 Bioretention (raingardens): Bioretention cells can be use to detain, treat, and infiltrate stormwater from a variety of surfaces. Typically, a bioretention cell consists of a minimum of an 18” depth of compost amended soil over a drain rock reservoir for collection or infiltration of the treated stormwater. They are often planted with native, draught tolerant plants. Benefits of bioretention facilities include enhanced water quality treatment, flow attenuation, aesthetic and habitat benefits, and potentially groundwater recharge. Bioretention can take many forms:

Raingarden Cell: A raingarden cell is a landscape depression, typically with planted natural side slopes fed by surface flow.


Raingarden Swale: Very similar to a raingarden cell, a raingarden swale is a longer, linear raingarden often located parallel to a roadway or other linear impervious surface. Due to the length and size of this type of facility, they often contain flow control weirs to allow for changes in grade.

Raingarden Bulb‐out: Often existing stormwater flows are directed to street intersections. By taking advantage of existing infrastructure locations, and providing pedestrian improvements for street crossings, raingarden bulb‐outs are located at intersection corners to collect, and treat stormwater before it crosses the intersection. These bulb‐outs often fit in unused corners adjacent to angled street parking, or bookend parallel parking areas.

Infiltration Flow‐through Planter: For more densely developed areas, space is at a premium. To maximize bioretention areas, infiltration flow‐through planters feature vertical sides. Due to available space this BMP may be sized to only treat the first flush of stormwater, and allow the larger storm flows to bypass the facility during a rain event.

Street Tree Biofilters: For even more densely developed areas, biofilters offer an even smaller footprint for bioretention. Their compact treatment footprint and inconspicuous appearance as a stormwater facility lend well to fully built‐out rights of way. Biofilters can serve as treatment only facilities or in combination with an infiltration facility.

2.3.2 Pervious Pavement: Pervious pavements are similar to conventional concrete and asphalt pavements, but allow stormwater to flow downward through the pavement section. The pervious pavement section itself provides some filtration and sediment removal. It is typically underlain by a chipped rock reservoir for collection or infiltration of the stormwater as well as structural support. Common pervious pavements include:

Porous Asphalt: A flexible pavement, often requiring a minimal pavement section thickness, with an expected lifecycle of approximately 20 years.

Pervious Concrete: A rigid pavement offering significant durability, with an expected lifecycle of approximately 50 years.

Permeable Pavers: An interlocking impermeable paver system with gaps between pavers that allow stormwater to flow through downward into the underlying subgrade.

Grass‐ or Gravel‐Pave Systems: Typically heavy duty plastic grid systems, both rigid and flexible, that can be filled with chipped gravel or soil with a grass seed mix. These systems are often used for fire lanes, overflow parking, or other areas with only occasional vehicular traffic use.

2.3.3 Skinny Streets: Skinny Streets are typical street sections minimizing the impervious surfaces needed for vehicular travel.

2.3.4 Cisterns: Rainwater harvesting typically uses cisterns for storing rainwater from roof areas. Cisterns can store rainwater for a variety of uses ranging from detention to reuse opportunities such as


irrigation, toilet flush, laundry, wash‐down, or even, potentially, potable uses. Cisterns can help to delay storm surges from entering the stormwater collection system by slowly releasing the collected water when an orifice device is installed on the cistern outlet.

2.3.5 Amended Soil: Compost amended soil helps to bring organic life and function back to heavily compacted or stripped soils. By tilling compost amended soil into the existing soils, it increases the stormwater holding capacity of the soil, provides a more nutrient rich and beneficial growing medium for plants, and thereby more closely mimics the hydrologic condition of the pre‐developed condition.

2.4 Evaluate Site Suitability in the Study Area through Field Investigation It is important to walk through the entire study area to observe existing drainage impacts and opportunities, and visually inspect existing drainage systems. Ideally, the study area should be evaluated during or immediately following a rain event, as well as during a dry period. During the site walkthroughs, note areas showing signs of erosion, sediment transport or accumulation, flooding, or failing or inadequate infrastructure. Also note expansive areas of impervious surfaces, and those with high pollutant potential.

Areas where drainages converge should be documented and evaluated for potential retrofits. Landscape strips parallel to roadways, other linear impervious surfaces, and public or private green spaces that have not been specifically planned as recreation areas or critical areas should be evaluated as to how to maximize their potential. Note vegetated buffers or other natural areas that may need restoration. Often restoration activities can be opportunities for dual‐purposed improvements for stormwater management as well as habitat improvements, native vegetation enhancement.

When walking through the study area, it is important to reach out to those most familiar with the historic drainage conditions. Community members often have the best anecdotal knowledge about what changes have occurred in the past to the surrounding hydrology, topography, land use, and infrastructure improvements even if they do not always know the cause of or reasons for those changes. It is also helpful to inquire about any past complaints or concerns submitted to the County by community members.

Community stakeholders from the following sectors were included in the process of determining potential retrofit sites as well as overall drainage concerns:

• Kingston Citizen Advisory Council

• Port of Kingston

• Village Green Foundation

• Kitsap County, including representatives from Surface and Stormwater Management (SSWM) Division, Department of Community Development (DCD), Public Works, Roads, and County Council Members

• Community Members


While no formal complaints or concerns had been filed with the County in the Kingston area, several community members shared stories during public meetings and site reconnaissance walks of the study area. The vast majority of concerns were related to the area of lowest elevation across from the Village Green Park area where several drainage conveyances converge and discharge to the nearby shoreline. Some of the areas of concern identified during the community stakeholder meetings were addressed at the specific area identified (i.e. Thriftway Parking Lot, and Firehouse Theater), while others were addressed by proposed retrofits upstream of the specific area (i.e. low lying area south of Village Green) by recommending retrofits closer to the sources of high stormwater runoff volumes.


Figure 2: Preliminary Retrofit Locations Identified by Stakeholders

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2.5 Compile Data After all data has been collected from previous studies, site reconnaissance, anecdotal interviews, and available infrastructure data, potential retrofit sites should be listed and described based on specific need, opportunity, and/or constraint. Based on the described needs, opportunities, and/or constraints of each potential retrofit, BMPs should be evaluated to determine which may be most appropriate. Input from key community stakeholders is important in selecting specific BMPs.

Potential retrofits can take different forms. A specific site with defined boundaries and a single BMP strategy is one option. Others may be more appropriate to be implemented as a development standard such as a typical street section incorporating several BMPs. Typical street sections can aid in a cohesive neighborhood look and feel, and can be implemented incrementally as development or redevelopment occurs.

Based on engineering knowledge, community priorities, and criteria identified in related studies, a list of potential prioritization criteria should be developed. These criteria will be the basis for determining which potential retrofits should be prioritized for further pursuit.

The prioritization criteria determined through this analysis process includes:

• Water Quality Treatment Benefits

• Flow Control • Pedestrian Connectivity • Public Safety • Parking • Public/Private Collaboration • Aesthetics • Increased Recreational Opportunity • Reduced Maintenance Costs

• Educational Opportunity • Community Plan Support

2.6 Evaluate Potential Retrofits Through a collaborative process with the community stakeholders, each identified retrofit was scored in the abovementioned prioritization categories. Stakeholders were also given the opportunity to include additional prioritization criteria. Because this is primarily a stormwater management retrofit project, some additional weight was given to those categories most critical to stormwater management: water quality treatment benefits, and flow control. This process identified the highest ranking retrofits within each Area of Primary Interest (API) as well as the overall highest ranking retrofits.

Due to the age and nature of development in certain areas, some APIs were in more need of assistance than others. For example, the Lindvog Road Commercial Corridor was recently redeveloped with median plantings and bike lanes in the roadway, as well as sidewalks and a regional constructed wetland


treatment area. Because of the relatively new improvements in this area, identified retrofits were prioritized higher in other areas within the Study Boundary.

Figure 3: Locations of Prioritized Retrofits

The retrofit identification numbers reflect their prioritization. Retrofit #2 was identified by the County as a project that could be implemented almost immediately, and was constructed by Kitsap County crews during the summer of 2012. Retrofit #3 has been identified to be incorporated with SR 104 sidewalk improvement efforts by the County Roads department in coordination with WSDOT.


3.0 Approach for Preliminary Retrofit Designs

3.1 Street Sections A holistic and integrated approach is needed when evaluating the public rights‐of‐way. These transportation and utility conduits serve multiple purposes and needs, and should be efficiently utilized for stormwater management.

When determining typical street sections for retrofits, it was first determined what each streetscape needed to be in support of previous and current planning efforts (i.e. sidewalks, bike lanes, parking, landscape, etc.) while also envisioning how each street would be used (i.e. a conduit to downtown, a local street, a connector from a commercial area to recreational areas, etc.). With those elements in mind, and with the intention of minimizing impervious surface, BMPs were selected that met the stormwater quality goals while supporting the other identified needs of each specific street and right‐of way. This type of retrofit can be installed incrementally as development and redevelopment occur.

3.2 Parking Lot Retrofits In addition to reviewing public areas, retrofit studies should also review potential private areas. Parking lots often offer significant opportunities for improvements.

For this study, two parking lots were identified as potential retrofit opportunities. Each was evaluated differently – one with pervious pavement, and the other with bioretention cells. These two examples stand alone as individual retrofits, while also serving as guides for potential improvements to other parking lots in the Study Area.

It can be expensive to re‐grade or re‐pave an entire parking lot. Each parking lot’s topography, use, and circulation were evaluated when determining an appropriate retrofit. For the retrofit including bioretention cells, low asphalt berms or channel drains may be installed to direct stormwater into existing planter areas. These planters could be enhanced into bioretention cells without disrupting traffic patterns. For the retrofit including permeable pavement, the layout of the parking stalls was rotated to be parallel with the contours allowing only the pavement in the stall areas to be replaced with permeable pavement in order to capture the sheet flow from the drive aisles in between each row of parking.

3.3 Site Specific Retrofits When evaluating a specific site to be retrofitted, it is important to keep in mind the source of the stormwater contributing to the site, the surrounding land uses, adjacent structures and infrastructure, as well as the prioritization criteria listed previously in this report. For example, if the stormwater tributary to a retrofit location contains a high concentration of fines or sediment, then a sump or catch basin may need to be installed upstream of the BMP. If a retrofit is adjacent to a steep slope or landslide area, infiltration should be avoided. After the site constraints and community plan elements have been adequately considered, BMPs should then be evaluated and designed based on their water quality, flow control, and aesthetic benefits.


4.0 Other Considerations

4.1 Additional Site Evaluations Additional geotechnical evaluations and survey information are needed for final design. Geotechnical work may include large and small scale infiltration testing, slope stability evaluation, cation exchange capacity testing, depth to groundwater (or other impermeable layer), and potentially a groundwater mounding analysis.

5.0 Summary The 47 retrofit projects identified during site reconnaissance and stakeholder meetings were identified based on stormwater management needs, stakeholder input, professional judgment, community need, and consistency throughout the Study Boundary. Of those 47 retrofit projects, the 13 that were prioritized for further consideration are described and illustrated in Appendix A of this report. Preliminary cost estimates for each of the retrofits are included in Appendix B. Notes and evaluation criteria from thorough site reconnaissance are included in Appendix C. The prioritization matrices are included in Appendix D.

Appendix A RETROFIT PROJECT SHEETS

KINGSTON LID RETROFIT

KITSAP COUNTYCLEAN STORMWATEROur Community, Our Waterways

www.kitsapgov.com/sswm

KINGSTON LID RETROFITSITE INDEX AND PRIORITY LIST



KINGSTON LID RETROFITSITE INDEX



LEGEND: STUDY BOUNDARY

API 1 DOWNTOWN CORE

API 2 VILLAGE GREEN

API 3 SR104 CORRIDOR

API 4 LINDVOG

API 5 EAST SIDE

5

4

885

3

1

1

2

9

8

5

1

6

1

7

14

12 10

11

13

POTENTIAL LID STRATEGIES:The Village Green Community Park abuts NE West

Kingston Road. This is one of the lowest areas in

Kingston. Several drainages converge in this area

before discharging to the Puget Sound. Improving

the grassy swale along the frontage of the property

into a raingarden will provide further treatment and

fl ow attenuation for the tributary stormwater from the

contributing roadways, landscapes, and pet exercise

areas. This retrofi t consists of a 4,500 s.f. raingarden with

an overfl ow/collection structure which will connect to

the existing storm drain beneath NE West Kingston Road.

1. Raingarden Swale - Water Quality improvement,

fl ood control, aesthetics, public and private

collaboration.

KINGSTON LID RETROFITVILLAGE GREEN COMMUNITY PARK LAND USE TYPE: COUNTY RIGHT OF WAY


AFTER


1

1

NE West Kingston

Dulay Road NE

OPPORTUNITIES AERIAL MAPPOTENTIAL LID AREAS

BEFORE

24” CLEAN PEA GRAVEL

SCARIFIED SOILS

6” RIGID PERFORATED UNDERDRAIN PIPE

CATCH BASIN WITH ATRIUM GRATE18” AMENDED SOIL

6” FLOOD DEPTH

TYPICAL CROSS SECTION

1

POTENTIAL LID STRATEGIES:The Firehouse Theatre is located along SR 104 near the NE California Ave and SR 104 intersection. South of the Theatre lies the Kola Kole County Park. A steeply graded slope separates the two properties. Run-off from the Theatre parking lot, SR 104 and residential neighborhoods north-east of the site converge near the site causing signifi cant accumulation in the north-east corner. Bank erosion could occur if continuous and sustained run-on volumes persist. A raingarden installed in the north-east corner will enhance water quality and fl ood control. A catch basin drop structure will be necessary to collect street level stormwater and safely convey it down to the raingarden area. A raingarden consisting of an 18” depth of amended soil over 12” (minimum) of pea gravel will provide treatment and fl ow attenuation for stormwater from SR104 corridor and the upper East Side.

1. Raingarden Cell- Water Quality, fl ood control, increased recreational opportunity, aesthetics, community plan support

KINGSTON LID RETROFITFIREHOUSE THEATRE LAND USE TYPE: COUNTY PROPERTY



2


AFTER

BEFORE

1

1


SCARIFIED SOILS


CATCH BASIN WITH ATRIUM 18” AMENDED SOIL

6” FLOOD DEPTH


KINGSTON LID RETROFITKOLA KOLE PARK LAND USE TYPE: COUNTY RIGHT OF WAY

POTENTIAL LID STRATEGIES:A drainage ditch bordering NE Maine Ave directly

south side of Kola Kole Park receives runoff from Maine

Ave, SR 104, and the Park. Although it adequately

collects water, installing a bioretention swale to

detain and treat the runoff would benefi t downstream

properties and habitats. Additionally, the bioretention

swale installation could serve as an environmental

education tool for the neighboring pre-school and

park. A raingarden swale consisting of 18” depth of

compost amended soil over 12” (minimum) of pea

gravel will provide treatment and fl ow attenuation

for local runoff from the immediate surround area.

1. Raingarden Swale- Water Quality, fl ood control,

aesthetics, education opportunity.


3


AFTER

BEFORE

1



SCARIFIED SOILS


CATCH BASIN WITH ATRIUM 18” AMENDED SOIL

6” FLOOD DEPTH


1



AFTER

KINGSTON LID RETROFITSTATE ROUTE 104 LAND USE TYPE: STATE RIGHT OF WAY


4


PLAN VIEW

POTENTIAL LID STRATEGIES:SR 104 Corridor cross section includes three roadway

segments from Washington Blvd NE to Lindvog Rd

NE. The narrow roadway currently lacks pedestrian

conduits and adequate stormwater management. The

proposed road section will have two north-bound travel

lanes for traffi c exiting the ferry, and two southbound

travel lanes. The sidewalks will be separated from

the travel lanes by street tree biofi lters, off ering

pedestrian security and pollution buff ers, as well as

sound buff ers to the surrounding neighborhood.

1. Porous Sidewalk- Water Quality, pedestrian

connectivity, increased recreational opportunity,

community plan support

2. Street Tree Biofi lter- Water Quality, fl ood control,

public private collaboration, aesthetics, community

plan support

Porous Bike Lane - water quality, fl ood control,

increased recreational opportunities, community

plan support.

1

2

3




AFTER

KINGSTON LID RETROFITSTATE ROUTE 104 LAND USE TYPE: STATE RIGHT OF WAY


4


TYPICAL SECTIONS

1 1

1

11

1

2

2

33

3 3

SECTION C

SECTION B

SECTION A

PLAN VIEW

2

`

4” PERVIOUS CONCRETE6” CHIPPED ROCK





BIOFILTER

BIOFILTER

SR 104

SR 104

SR 104

NE WEST KINGSTON RD.

KINGSTON LID RETROFITTYPICAL RESIDENTIAL CONNECTOR STREET LAND USE TYPE: COUNTY RIGHT OF WAY

POTENTIAL LID STRATEGIES:Residential streets east of SR 104 and the downtown

area will require upgrades as population and

development increases. The sidewalks and bike

lanes, which currently don’t exist on many streets,

encourage recreation and connect residents to their

neighbors and community. Raingardens detain and

fi lter stormwater runoff , simultaneously improving

water quality and abating fl oods. Additionally, the

optional parking creates benefi cial space for residences.


AFTER SECTION

5


PLAN VIEW

4


1. Porous Sidewalk- Water Quality, fl ood control,

pedestrian connectivity, public safety, increased

recreational opportunity, community plan support.

2. Raingarden Swale- Water Quality, fl ood control,

aesthetics, community plan support.

3. Optional parking- Parking.

4. Porous Bike Lane - water quality, fl ood control,


plan support.

EAST SIDE - CONNECTOR(OHIO, ILLINOIS, IOWA STREETS)



AFTER

KINGSTON LID RETROFITTYPICAL RESIDENTIAL CONNECTOR STREET LAND USE TYPE: COUNTY RIGHT OF WAY


5


TYPICAL SECTION

1 34

21

1

2

34


18” COMPOST AMENDED SOIL3” POROUS ASPHALT6” CHIPPED ROCK

3” POROUS ASPHALT6” CHIPPED ROCK


KINGSTON LID RETROFITN.E. WEST KINGSTON ROAD LAND USE TYPE: COUNTY RIGHT OF WAY

POTENTIAL LID STRATEGIES:NE West Kingston Rd lies on Kingston’s south side near

the Village Green Park. Kingston Rd is gently sloping

towards a low point near the exit to the Village Green

Park. Upstream storm system issues often converge

in this low lying area, causing signifi cant stormwater

run-on and fl ooding that aff ects private properties.

Stormwater accumulates at Lindvog Rd NE and the

Village Green Park where runoff crosses over to the

south side of the road and impacts private properties.

Providing infi ltration facilities to cut-off the fl ow of water

such as porous sidewalks, bike lanes and raingardens

would reduce run-on volumes to private properties

as well as provide water quality treatment benefi ts.


6


PLAN VIEW


NE WEST KINGSTON ROAD(LOOKING WEST) 11. Porous Sidewalk- Water Quality, fl ood control,

community plan support.

2. Porous Bike Lane- Water Quality, fl ood control,


3. Raingarden Planter - Water Quality, fl ood control,




KINGSTON LID RETROFITN.E. WEST KINGSTON ROAD LAND USE TYPE: COUNTY RIGHT OF WAY


6


TYPICAL SECTION

1

2

3

12 2

3


6” COMPOST AMENDED SOILTILLED INTO TOP 12” EX. SOIL

6” COMPOST AMENDED SOILTILLED INTO TOP 12” EX. SOIL

18” COMPOST AMENDED SOIL6” DIAMETER RIGID PERFORATED UNDERDRAIN

12” PEA GRAVEL

*For future replacement, porous pavement should be used

KINGSTON LID RETROFITTHRIFTWAY GROCERY STORE PARKING LOT LAND USE TYPE: PRIVATE PROPERTY


7


AFTER

POTENTIAL LID STRATEGIES:The Thriftyway Grocery Store is on the north side of SR

104 between Bannister St and Lindvog Rd NE. The large

roof and impervious parking areas result in pooling

water and contribute to downstream fl ooding. Similar

to a roadway, automotive pollutants are deposited on

the impervious area and washed to sensitive habitats

downstream by stormwater. Installing raingarden

cells (approximately 5% of the total parking lot area)

to fi lter and infi ltrate the stormwater decreases

contributions to the County stormwater system

by infi ltrating the water at the point of origin, and

allowing for evapotranspiration. Small berms or

channel drains adjacent to the parking stalls direct the

stormwater to the raingarden cells from the existing

pavement surface with minimal cost and demolition.


THRIFTWAY PARKING LOT1. Raingarden Cell with Underdrain- Water Quality, fl ood

control, public-private collaboration, aesthetics2. Berm or channel drain- Water quality, fl ood control,

public-private collaboration



KINGSTON LID RETROFITTHRIFTWAY GROCERY STORE PARKING LOT LAND USE TYPE: COUNTY RIGHT OF WAY


7


TYPICAL SECTION

1

2

1

2

18” COMPOST AMENDED SOIL6” DIAMETER RIGID PERFORATED UNDERDRAIN TO STORM DRAIN12” PEA GRAVEL

POTENTIAL LID STRATEGIES:Similar to the current connector streets, many East

Side streets lack sidewalks, parking areas, and formal

stormwater management facilities. Porous sidewalks

and raingarden swales would help to infi ltrate and fi lter

any runoff from residential impervious surfaces. Since

the local streets (NE E 2nd, 3rd, & 4th) run perpendicular

to the steep embankment near Washington Blvd NE,

infi ltrating the East Side area stormwater at a safe

setback distance (approximately 100’, to be confi rmed

by geotechnical evaluation) prevents bank erosion and

protects Puget Sound’s water quality. The optional

parking creates benefi cial space for residences.


PLAN VIEW

8KINGSTON LID RETROFITTYPICAL RESIDENTIAL LOCAL STREET LAND USE TYPE: COUNTY RIGHT OF WAY



EAST SIDE - LOCAL(2ND, 3RD, 4TH)




2. Raingarden Swale - Water Quality, fl ood control,


3. Optional parking.



KINGSTON LID RETROFITTYPICAL RESIDENTIAL LOCAL STREET LAND USE TYPE: COUNTY RIGHT OF WAY


8


TYPICAL SECTION

1

2

3

1 2 3 2 1

18” COMPOST AMENDED SOIL6” DIAMETER RIGID PERFORATED UNDERDRAIN TO STORM DRAIN12” PEA GRAVEL


KINGSTON LID RETROFITBANNISTER STREET LAND USE TYPE: COUNTY RIGHT OF WAY

POTENTIAL LID STRATEGIES:Bannister Street (formerly W 1st St. NE) within the

downtown sector connects two major thoroughfares,

SR 104 and NE West Kingston Rd. Supported in the

Community Plan, the new LID strategies include

porous bike lanes, porous sidewalks, and bulb-

outs featuring raingarden cells. Water quality,

fl ood control, recreational uses and pedestrian

connectivity are just a few of the qualifi able benefi ts.



9

PLAN VIEW


BANNISTER STREET NE(FORMERLY W. 1st STREET NE)

1. Porous Bike Lane- Water Quality, fl ood control,


plan support.


pedestrian connectivity, increased recreational

opportunities, community plan support.

3. Raingarden Bulb-Out Cells- Water Quality, fl ood

control, parking, aesthetics.



KINGSTON LID RETROFITBANNISTER STREET LAND USE TYPE: COUNTY RIGHT OF WAY


9


TYPICAL SECTION

1

2

3

2

21 1

3



18” COMPOST AMENDED SOIL6” DIAMETER RIGID PERFORATED UNDERDRAIN

12” PEA GRAVEL


KINGSTON LID RETROFITMAIN STREET LAND USE TYPE: COUNTY RIGHT OF WAY

POTENTIAL LID STRATEGIES:Main St. (currently the southbound lane of NE State

Highway 104) is the heart of Kingston, WA. The heavy

traffi c results in pollution deposits on the impervious

roadway surfaces. Porous pavement surfaces

provide some treatment prior to infi ltration (further

geotechnical study needed to confi rm infi ltration and

treatment capacity of insitu soils). Not only would

porous bike lanes, parking and sidewalks allow

infi ltration to native soils and reduce contributions

to the City’s stormwater system, they also provide

treatment prior to infi ltration. Infi ltration fl ow-through

planters provide the enhanced treatment of a typical

raingarden in an effi cient, compact footprint to allow

for maximum sidewalk width and parking stalls.



10

PLAN VIEW


MAIN STREET1. Center Planter- Maintains existing trees.

2. Porous Bike Lane- Local fl ood control, increased

recreational use, community plan support.

3. Porous Parking- Water quality, local fl ood control,


Porous sidewalk- Water Quality, fl ood control,



Infi ltration Flow-Through Planters - Water quality in

small footprint, local fl ood control, aesthetics



KINGSTON LID RETROFITMAIN STREET LAND USE TYPE: COUNTY RIGHT OF WAY



TYPICAL SECTION

12

3


10

4 3

2

1

243

4

55

5

KINGSTON LID RETROFITNE CALIFORNIA STREET RIGHT OF WAY LAND USE TYPE: COUNTY RIGHT OF WAY

POTENTIAL LID STRATEGIES:California St is currently partially developed. Connecting

the existing dead end of Calfornia Street through to

Lindvog Road would impact a sensitive wetland area. An

elevated boardwalk extending over the native landscape

connects pedestrians and cyclists from Bannister St and

Lindvog Rd NE to the proposed Village Green Community

Center with minimal impact. The multi-use boardwalk

can accommodate both pedestrians and bicyclists

safely without increasing impervious surface area.



11

PLAN VIEW


CALIFORNIA STREET ROW(ELEVATED BOARDWALK)

1. Multi-use raised boardwalk- minimal wetland impact,

pedestrian conductivity, increased recreational

opportunities, public safety, public private

collaboration, increased recreational opportunities,




KINGSTON LID RETROFITNE CALIFORNIA STREET RIGHT OF WAY LAND USE TYPE: COUNTY RIGHT OF WAY



TYPICAL SECTION

1

11

1

KINGSTON LID RETROFITPORT OF KINGSTON PARKING LOT LAND USE TYPE: PORT PROPERTY

POTENTIAL LID STRATEGIES:The Port of Kingston parking lot is a large impervious

area bordering Appletree Cove. The elevation is low, the

underlying soils are permeable, and it contains a vortex fi lter

that removes some suspended solids prior to the stormwater

reaching the fi nal outfall in the Cove. Rotating the parking

confi guration 90 degrees allows the stalls to run parallel to

the contours. The pavement in the parking stalls may then be

replaced with porous pavement, allowing the runoff from the

drive aisles to fl ow towards the porous stalls, and infi ltrate

into the sandy soils below. This reduces the performance

demands on the vortex fi lter, and provides for better treatment

and fl ow attenuation before the stormwater reaches the

cove. If additional impervious surfaces are removed from

the Port parking area, porous pavement should be placed

in lieu impervious surfaces. A 12” chipped rock layer should

also be installed under all porous surfaces to serve as an

additional stormwater reservoir. A large sand fi lter could be

installed beneath the pavement to treat and provide area for

infi ltration of contributing off site stormwater fl ows as well.KITSAP COUNTYCLEAN STORMWATEROur Community, Our Waterways


12

PLAN VIEW


PORT OF KINGSTON PARKING LOT

1. Porous Parking- Water quality, fl ood control, Kitsap

County/Port of Kingston collaboration.



KINGSTON LID RETROFITPORT OF KINGSTON PARKING LOT LAND USE TYPE: PORT PROPERTY



TYPICAL SECTION

1

12

1

DETAIL


SCARIFIED SOILS


FLOW FLOW

KINGSTON LID RETROFITSR 104 AT ARCO LAND USE TYPE: STATE RIGHT OF WAY/ PRIVATE PROPERTY



13

AFTER

BEFORE

POTENTIAL LID STRATEGIES:A grassy swath in front of the Arco Gas Station would be

a benefi cial place for a raingarden cell. This site would

fi lter and detain stormwater runoff from the gas station

and neighboring businesses. It could also potentially

fi lter and detain stormwater from the adjacent NE SR

104 and from the strip mall parking area across the

street, benefi tting downstream stormwater facilities and

properties. A raingarden cell consisting of 18” depth of

compost amended soil over 12” (minimum) of pea gravel

will provide treatment and runoff fl ow attenuation.

1. Raingarden Cell- Water Quality, fl ood control, public-

private collaboration, aesthetics.1


DETAIL

CATCH BASIN WITH ATRIUM GRATE

12” CLEAN PEA GRAVELSCARIFIED SOILS

18” AMENDED SOIL

6” FLOOD DEPTH


3:1 SLOPE

Appendix B PRELIMINARY COST ESTIMATES

PROJECT NO. LOCATION INPUT QTY UNIT UNIT COSTSUBTOTAL

COSTTOTAL

EXCAVATION 750 CY $9.93 $7,448COMPOST AMENDED SOIL (TYPE 1 COMPOST) 250 CY $30.83 $7,708PLANTINGS (4500 SF) 2,000 PLANTS $4.90 $9,800PEA GRAVEL (24") 333 CY $29.16 $9,720CATCH BASIN WITH ATRIUM GRATE 1 EACH $2,071.50 $2,0726" RIGID PERFORATED UNDERDRAIN PIPE 285 LF $13.83 $3,942CONCRETE SIDEWALK REMOVAL 302 SY $17.15 $5,179ASPHALT ROADWAY REMOVAL 1,293 SY $6.16 $7,964EXCAVATION 456 CY $9.93 $4,528CONCRETE CURB AND GUTTER 1,840 LF $23.57 $43,369STREET TREE BIOFILTER 4 EACH $11,000.00 $44,000SIDEWALK BASE COURSE 323 TON $21.44 $6,923PERVIOUS CONCRETE SIDEWALK 11,636 SF $5.35 $62,253EXCAVATION 624 CY $9.93 $6,192ASPHALT ROADWAY REMOVAL 1,833 SY $6.16 $11,293CONCRETE CURB AND GUTTER 731 LF $23.57 $17,230TREE BOXES 2 EACH $11,000.00 $22,000SIDEWALK AND BIKE LANE BASE COURSE 458 TON $21.59 $9,886PERVIOUS CONCRETE SIDEWALK 9,334 SF $5.35 $49,937PERVIOUS CONCRETE BIKE LANE 7,166 SF $5.35 $38,338ASPHALT ROADWAY REMOVAL 2,611 SY $6.16 $16,084SIDEWALK AND BIKE LANE BASE COURSE 1,306 TON $21.59 $28,187PERVIOUS CONCRETE SIDEWALK 11,750 SF $5.35 $62,863PERVIOUS CONCRETE BIKE LANE 11,750 SF $5.35 $62,863EXCAVATION 4,204 CY $9.93 $41,741COMPOST AMENDED SOIL (TYPE 1 COMPOST) 2,211 CY $30.83 $68,169PLANTINGS (39,800 SF) 17,689 PLANTS $4.90 $86,676CATCH BASIN WITH ATRIUM GRATE 8 EACH $1,733.00 $13,8646" RIGID PERFORATED UNDERDRAIN PIPE 2,587 LF $13.83 $3,942POROUS PAVEMENT BASE COURSE 1,746 TON $21.59 $37,693PERVIOUS CONCRETE SIDEWALK 26,437 SF $5.35 $141,438POROUS ASPHALT PARKING 23,650 SF $2.15 $50,848POROUS ASPHALT BIKE LANE 12,827 SF $2.15 $27,578CONCRETE SIDEWALK REMOVAL 805 SY $17.15 $13,806CONCRETE CURB 1,574 LF $35.45 $55,798ASPHALT ROADWAY REMOVAL 1,667 SY $6.16 $10,268EXCAVATION 1,244 CY $9.93 $12,353COMPOST AMENDED SOIL (TYPE 1 COMPOST) 733 CY $30.83 $22,598PEA GRAVEL (12") 160 CY $29.16 $4,657PLANTINGS (4,312 SF) 1,916 PLANTS $4.90 $9,3886" RIGID PERFORATED UNDERDRAIN PIPE 1440 LF $13.83 $3,942POROUS PAVEMENT BASE COURSE 617 TON $21.59 $13,329PERVIOUS CONCRETE SIDEWALK 7,245 SF $5.35 $38,761POROUS ASPHALT BIKE LANE 15,003 SF $2.15 $32,256ASPHALT CONCRETE REMOVAL 704 SY $6.16 $4,337

$ $

4ASR104 CORRIDOR

SECTION A

5 TYPICAL CONNECTOR STREET

6 N.E. WEST KINGSTON ROAD

$154,876SR104 CORRIDOR

SECTION B4B

$169,9964CSR104 CORRIDOR

SECTION C

$217,158

PRELIMINARY PROJECT COST ESTIMATES

$40,688

$174,216

$471,948

VILLAGE GREEN COMMUNITY PARK1

EXCAVATION 821 CY $9.93 $8,152COMPOST AMENDED SOIL (TYPE 1 COMPOST) 352 CY $30.83 $10,847PLANTINGS (6,333 SF) 2,815 PLANTS $4.90 $13,794PEA GRAVEL (12") 235 CY $29.16 $6,840CATCH BASIN WITH ATRIUM GRATE 11 EACH $2,071.50 $22,7876" RIGID PERFORATED UNDERDRAIN PIPE 1,380 LF $13.83 $19,085BERM 450 LF $10.08 $4,536EXCAVATION 6,634 CY $9.93 $65,878COMPOST AMENDED SOIL (TYPE 1 COMPOST) 2,531 CY $30.83 $78,031PEA GRAVEL (12") 1,676 CY $29.16 $48,870PLANTINGS 20,111 PLANTS $4.90 $98,544CATCH BASIN WITH ATRIUM GRATE 7 EACH $2,071.50 $14,5016" RIGID PERFORATED UNDERDRAIN PIPE 930 LF $13.83 $12,862SIDEWALK BASE COURSE 576 TON $21.59 $12,432POROUS CONCRETE SIDEWALK 20,750 SF $5.35 $111,013EXCAVATION 518 CY $9.93 $5,145COMPOST AMENDED SOIL (TYPE 1 COMPOST) 167 CY $30.83 $5,138CATCH BASIN WITH ATRIUM GRATE 3 EACH $2,071.50 $6,2156" RIGID PERFORATED UNDERDRAIN PIPE 368 LF 13.83 $5,089PLANTINGS (3,000 SF) 1,333 PLANTS $4.90 $6,532PAVEMENT BASE COURSE 452 TON $21.59 $9,766PERVIOUS CONCRETE SIDEWALK 5,500 SF $5.35 $29,425POROUS ASPHALT PARKING 3,250 SF $2.15 $6,988POROUS ASPHALT BIKE LANE 7,550 SF $2.15 $6,988CONCRETE SIDEWALK REMOVAL 2,550 SY $17.15 $43,733ASPHALT ROADWAY REMOVAL 2,429 SY $6.16 $14,962EXCAVATION 1,702 CY $9.93 $16,903PRECAST CONCRETE RAINGARDEN STRUCTURE 708 LF $110.00 $77,880COMPOST AMENDED SOIL (TYPE 1 COMPOST) 105 CY $6.16 $647PLANTINGS 1,333 PLANTS $4.90 $6,532PEA GRAVEL (12") 70 CY $29.16 $2,041PAVEMENT BASE COURSE 1,243 TON $21.59 $26,847PERVIOUS CONCRETE SIDEWALK 22,950 SF $5.35 $66,126POROUS ASPHALT PARKING 12,360 SF $2.15 $20,425POROUS ASPHALT BIKE LANE 9,500 SF $2.15 $20,425

11 CALIFORNIA STREET BOARDWALK 640 LF $515.63 $330,000 $330,000

REMOVING ASPHALT PAVEMENT 5,878 SY $6.16 $36,207EXCAVATION 2,606 CY $9.93 $25,876PAVEMENT BASE COURSE 1,468 TON $21.59 $31,694POROUS ASPHALT PARKING 52,900 SF $2.50 $132,250EXCAVATION 428 CY $9.93 $4,248COMPOST AMENDED SOIL (TYPE 1 COMPOST) 183 CY $30.83 $5,652PLANTINGS (3,300 SF) 1,467 PLANTS $4.90 $7,188CATCH BASIN WITH ATRIUM GRATE 1 EACH $2,071.50 $2,0726" RIGID PERFORATED UNDERDRAIN PIPE 147 LF $13.83 $2,033PEA GRAVEL (12") 122 CY $29.16 $3,564

THRIFTWAY GROCERY STORE PARKING LOT

$24,75713 SR 104 AT ARCO

12 $226,026

8 TYPICAL LOCAL CROSS STREET $442,130

9

PORT OF KINGSTON PARKING LOT

BANNISTER STREET $81,284

10 MAIN STREET $296,520

$90,3777

Appendix C SITE ASSESSMENT FIELD NOTES

Picture No. StreetBlock

Development Type Existing Infrastructure Issues (Pontential and Apparent)

Potential LID Strategy Other Notes

Parking lot Port property? instead of countyRaingarden planter

~ Existing catch basin could indicated~ Port of Kingston tributary (County ties to Port)

Commerical main streetRaingarden strip ~ Surrounding parking lots could yield

~ Vortex filter acts as treatment before the bay

Infiltration flow through planter ~ Port of Kingston tributary (County ties to Port)

Porous bike lane ~ Vortex filter acts as treatment before the bay

Moderate to steep slopes; Port propertyRaingarden strip ~Could handle parking lot runoff ~Port of Kingston tributary

~Raingarden strip could be terraced

~VF present

Commerical main street Moderate slopePorous Parking

Commerical main street Economic developmentBulb Out

Pedestrian improvements

Commerical main street~Potentially remove a parking spot

Raingarden Strip, Raingarden Planter

Parking lot Grade for raingarden~Current asphalt is beat up. This would be a good project site

Commerical main streetRaingarden Strip, Porous Parking

Parking lotRaingarden Planter ~Private property

Commerical main street

LDR= Low Density Res. A /B= Arterial & BoulevardHDR= High Density Res.

PL= Parking LotCMS= Com. Main StreetB/R= Building/Roof

H2O QL= Water Quality PED IMPR= Pedestrian Improvements PRK IMPR= Parking Improvements

Grade= Grading Issues ECON DEV= Economic Development FLD=

Flooding IssuesRD IMPR= Roadway Improvements

PDRUN= Private Development Run‐on

AS= Amended SoilBULB= Bulb OutCIST= Cistern

GG= Green GutterIFTP= Infiltration‐Flow Through Planter

PBL= Porous Bike LanePS= Porous Sidewalk PPRK= Porous ParkingRGS= Raingarden Strip

RGP= Raingarden Planter SCE= Stormwater Curb Extension

SS= Skinny Streets

Central

Washington

Washington

Washington and Main

Washington

Washington

Washington and Central

DOWNTOWN CORE

927

928‐931

932‐936

937‐943

943

Washington

944‐953

944‐953

1 921‐926

2

3

4

5

6

7

8




~ Sea of pavement

Porous Parking ~ Runs onto private property

Bulb Out, Green Gutter ~ No sidewalks

Pedestrian Improvements ~Southeast corner bulb out

~Extend sidewalk past Ohio St.

Pedestrian Improvements Pervious Sidewalk

Parking LotRaingarden Planter, Raingarden Strip, ~Likely have right of way

Commercial Main Streetand Porous Parking ~Lots of vehicular access, would be difficult for vegetation.

Raingarden Planter, Raingarden Strip, ~Private property.

and Vegetated Strip

Raingarded StripImproved ditch to raingardenstrip.

~Highway run‐on

Pedestrian Improvements

Bulb Out, Infiltration‐Flow Through Planter, ~Park, raingarden, and road cannot remain the same. Terracign would be required.

Commercial Main StreetModerate Grade (7% ‐8%)

and Stormwater Curb Extension ~Sidewalk on 1st of street so improvements would be difficult.

~Existing tree would need to be removed.











SS= Skinny StreetsVS= Vegetated Strip

Ohio St.

Ohio St.

Ohio St.

Maine St. and Main St

W 1st St. NE

Ohio St and Washington Alley

Ohio St

Main St. and Ohio St

East of Main

West of Main

West of Main

964‐965

966‐967

968‐971

972‐973

974‐980

981‐98916

11

12

13

14

15

9

10

954

955‐963




~Private Run‐on

Rainwater Planter

Undeveloped Pedestrian ImprovementsSkinny Streets

Good Lighting~ Open water flowing

~Potential typical street section.

~ Neighbor (Chris) wants skinny street and good lighting.

Commerical Main Street Pedestrian ImprovementsGreen Gutter, Infiltration‐Flow Through Planter,

~Flexible parking/paving~One lane of traffic each direction.

Porous Bike Lane, and Porous Parking ~Porous parking for parrallel parking.

~Pictures 1043‐1044 illustrate drainage issues

Raingarden Planter, Raingarden Strip ~Runoff can be picked up from the loop and west kingston

~No grade constraints or pedestrian improvements.

Raingarden Planter, Raingarden Strip ~Water should be diverted from the street to thin raingarden close to the street.

and Porous Bike Lane ~Cut off by tennis streets?

~Everything from 272 to Lindvog drains here.

~Catch basin outfall (Village Green Outfall)

~Vortechnics stormwater treatment system.

Low Density Residential Moderate GradeBulb Out ~Lots of curbside debris.












1st St.

California St

Sewer Plant Field

Village Green Park/Dulay Road

N.E. West Kingston St.

N.E. West Kingston St.

N.E. West Kingston and 1st St.

VILLAGE GREEN

25 1026 N.E. West Kingston and Main St.

1000‐102

103‐108

1009

1023‐1025

990

991‐999

21

22

23

17

18

19

20




Commercial Main StreetRaingarden Planter ~Catch basin next to prospective raingarden

~6 ft. fall on east side of SR104 from parking lots.

Commercial Main Street Roadway ImprovementsRaingarden Planter and Vegetated Strip ~Picks up run‐on and street run‐on (not catching street run‐off).

Raingarden Planter, Raingarden Strip ~Gets very wet (Pic 1082?)

and Vegetated Strip ~Bank erosion a serious concern, possible area for terracing

~Gets wet a 1082 (?????; not sure what this refers to)

Commercial Main StreetPorous Parking Lane ~ West lane of SR 104 should be pervious (lots of runoff to hotel parking lot)

HWK??~Berm on east side of the SR104 could be installed to prevent run‐on.

Hotel Parking Lot

HWK????Raingarden Planter, Rinagarden Strip,

Should stripe~ A large slot drain indicates that this is a large contributing area.

Vegetated Strip, Vegetated Swale, ~Raingarden on Northeast Georgia (Pic 1090) to cut run‐on off at the pass

and Porous Parking ~Multi‐family homes present.

Steep Slope~Significant roadway erosion

~Private drainage with no treatments

~Daylights at NE Georgia.

Flooding Issues □ BULB □ GG □ IFTP □ SCE ~Should be dredged ~actually catching sediment; appears to be doing it's job.

□ RP □ RS □ VS □ VSW □ AS ~Catch basin is pretty high ~the water breaches or leaches the cobbles.

□ PBL □ PS □ PPRK □ SS □ CIST ~Private land












1st and Illinois

Kingsvill Loop

Sediment Pond Behind Post Office

1090‐1091

1096‐1097

104 and Ohio St.

104 and Illinois St.

Firehouse Theatre

Blue Water Inn

1059

104 CORRIDOR

32

26

27

28

29

30

31




HWK Roadway, Bike LaneRaingarden Planter ~Mud in the depression

HWKRaingarden Planter and Raingarden Strip ~Four‐way intersection

~Pretty high traffic (just intersection and pot. 104)

Infiltration‐Flow Through Planter, ~Use exisitng planter on street

Raingarden Planter and Raingarden Strip

Undeveloped LandRaingarden Planter, Raingarden Strip ~Can water be diverted from storm sewer?

Vegetated Strip, and Vegetated Swale

Treatmen FacilityVegetated Strip and Vegetated Swale

Constructed Treatment Wetland~Bioswale

(Skate park)~Constructed Wetland

RoadwayInfiltration‐Flow Through Planter, ~Terraced bioswale ~ Long area without treatment.

Raingarden, and Porous Bike Lane ~Median as Infiltration‐Flow Through Planter

~Bike lane already present

Roadway, □ BULB □ GG □ IFTP □ SCE

Residential,□ RP □ RS □ VS □ VSW □ AS

and Commercial □ PBL □ PS □ PPRK □ SS □ CIST












SR104 and Lindvog

Lindvog

Lindvog Right of Way

Lindvog Right of Way

Lindvog by Kingston

Corner of Penn, 2nd, and SR104

36

37

38

39

LINDVOG COMMERCIAL CORRIDOR

SR104Company Camara

267

273

33

34

35




Bike Land ImprovementsVegetated Strip, Vegetated Swale ~Roadway sloped to the north with vegetated swale.

(Biking up a on‐way street)and Porous Bike Lane ~Some natural treatment systems currently in the right of way.

~Water crossing Washington St could increase erosion (which could be prevented by an LID swale on 2nd).

2nd street ResidentialSteep Grading steep up Ohio

but flatens at 2nd intersection)Raingarden Planter, Raingarden Strip

and abovePorous Bike Lane, Porous Sidewalk

and Porous Parking.

Residential Steed Grade~Very Steep (would require lining).

~Currently, stormwater flows over the bluff.

Above 3rd St. ResidentialRaingarden Planter and Raingarden Strip

Lined rain garden~Lined rain garden

~Check dams between 3rd and 4th streets.

Above 4th St. ResidentialRaingarden Planter, Raingarden Strip ~Channelling and curb should be removed immediately

Vegetated Strip, and Vegetated Swale ~Near 4th st., the run‐off channels to a culvert.

200 Residential Pedestrian ImprovementsRaingarden Strip ~Raingarden strip could be placed between sidewalk and wide road.

100‐200 Residential Pedestrian ImprovementsBuolb Out and Porpus Parking

Pocket Parking with Bulb Outs

□ BULB □ GG □ IFTP □ SCE ~Multifamily development appearing to have it's own treatment

□ RP □ RS □ VS □ VSW □ AS ~Treatment in the form of ditches.

□ PBL □ PS □ PPRK □ SS □ CIST












3rd Street

Ohio

Ohio and 4th Street

Iowa

Iowa

Illinois

Washington and 2nd

Ohio

EAST SIDE AREA

46

47

48

41

42

43

44

45




Residential~Curb extensions

~Existing sidewalks with planters

Residential No Detention!~Conveyance and swales are currently present

Pedestrian Improvements!~No dentention is present

□ BULB □ GG □ IFTP □ SCE

□ RP □ RS □ VS □ VSW □ AS




























Pennsylvania

Kingsville Loop

56

51

52

53

54

55

49

50

Appendix D PRIORITIZATION MATRICES

DESCRIPTIONMAP GRID LOCATION

RECOMMENDED BMP

PHYSICAL STREET LOCATION

STRATEGY BENEFITS

AMENDED SOIL

BULB‐OUT

CISTERN

GREEN

GUTTER

INFILTRATION‐FLOW THROUG

H PLAN

TER

PORO

US PAVING

RAINGA

RDEN

PLANTER

RAINGA

RDEN

STRIP

TREE BO

X FILTER ‐ FILTERRA

SKINN

Y STREETS

VEGETATED STRIP

VEGETATED SWALE

WATER QUA

LITY TREATMENT BENEFIT

LOC

AL FLOOD CO

NTROL B

ENEFIT

(CONV

EYAN

CE AND

STORAGE)

PEDESTRIAN CO

NNECTIVITY

PUB

LIC SAFETY

PARKING

PUB

LIC/PRIVATE CO

LLABORATION

AESTHETICS

INCREASED RECREATIONA

L OPPORTUN

ITY

REDUC

ED MAINTENAN

CE COSTS

EDU

CATION

AL OPPORTUN

ITY

COM

MUN

ITY PLAN

SUPPO

RT

TOTAL



A B C D E F G H I J K

D9 Port of SW Kingston Parking Lot Opportunity for pervious pavement X 3 5 1 1 1 3 3 3 1 1 3 25

E10 Washington Blvd NE and Central Ave S Potential raingarden along south side of Washington near Port property ‐ existing catch basin in landscape X X 5 5 1 1 1 3 5 1 1 1 3 27

E9, E10 Central Ave S Possible pervious bike lane location, potential Port/County collaboration, large infiltration area X 3 5 1 1 1 3 3 3 1 1 3 25

E10 Washington Blvd NE (South of Main St.) Possible location for a terraced rain garden, potential Port and County collaboration X 5 5 3 1 1 3 5 1 1 1 3 29

F10 SW Corner Washington Blvd NE and Main Parking Significant impervious areas (parking areas), Port considering a potential parking structure X 5 5 1 1 1 3 5 1 1 1 3 27

F10 Washington Blvd NE (North of Main St.) Existing parking areas converted to pervious paving X 3 3 1 1 1 3 3 1 1 1 3 21

F10 Washington Blvd NE (Near Northstar Company) Possible water quality issues on private property ‐ Raingarden Bulbout near parking X X 5 5 1 3 1 3 5 1 1 1 3 29

F10 Alley Between Ohio and Washington Blvd NE St. Significant impervious areas ‐ Pervious Alley X 3 5 1 1 1 3 3 1 1 1 3 23

F9 Ohio Ave NE Ohio St. runoff runs onto private parking area X 3 5 1 1 1 5 3 1 1 1 3 25

F9 Main St and Ohio St Improve pedestrian or cycling infrastructure, southeast corner is a good bulb out location X X 5 5 5 5 1 3 5 3 1 1 3 37

E9 Ohio Ave NE Potential pervious sidewalk location X 3 5 5 5 1 1 3 3 1 1 3 31

E9 Ohio Ave NE (mid‐block) Potential right‐of‐way raingarden to maintain vehicular access to surrounding parking areas X X 5 5 3 3 1 5 5 1 1 1 3 33

F7 Kola Kole Park along Maine St Bioretention opportunity (by Kingston Co‐op Preschool and Baseball diamond) X 5 5 3 3 1 1 5 1 1 5 3 33

F7 W 1st St. NE at NE West Kingston St. Ideal location for raingarden bulbout at intersection X X 5 5 3 3 1 3 5 3 1 1 3 33

‐ W 1st St. NE Cross Section (Bannister St) Porous sidewalk, porous bike lane, and rain garden bulbouts/parking X X 5 5 5 5 3 1 5 5 1 1 5 41

‐ Main St Cross Section (A) Porous sidewalk, porous parking, porous bike lane, rain garden (inverted crown) X X 5 5 3 3 1 3 1 5 1 1 5 33

‐ Main St Cross Section (B) Porous sidewalk, porous parking, porous bike lane (standard crown) X 3 5 3 3 1 3 3 5 1 1 5 33

DOWNTOWN CORE

Kingston Green Stormwater Retrofit Project January 4, 2012


RECOMMENDED BMP


STRATEGY BENEFITS

AMENDED SOIL

BULB‐OUT

CISTERN

GREEN

GUTTER


H PLAN

TER

PORO

US PAVING

RAINGA

RDEN

PLANTER

RAINGA

RDEN

STRIP

TREE BO


SKINN

Y STREETS

VEGETATED STRIP

VEGETATED SWALE

WATER QUA


LOC

AL FLOOD CO

NTROL B

ENEFIT

(CONV

EYAN

CE AND

STORAGE)

PEDESTRIAN CO

NNECTIVITY

PUB

LIC SAFETY

PARKING

PUB

LIC/PRIVATE CO

LLABORATION

AESTHETICS


L OPPORTUN

ITY

REDUC

ED MAINTENAN

CE COSTS

EDU

CATION

AL OPPORTUN

ITY

COM

MUN

ITY PLAN

SUPPO

RT

TOTAL




E5Flooding/inadequate drainage in forested area (saturated soils), opportunity for pervious pavement in new community center (also an area of concern)

X 3 3 1 1 1 1 3 3 3 1 1 21

D6 Opportunity for porous pavement in Dulay Rd. loop, public/private collaboration, sheet flowing water X 3 5 1 1 1 5 3 3 3 3 3 31

C6, D7 North N.E. West Kingston St. at Village Green Ponding water, converging drainages ‐ ideal raingarden location X X 5 5 1 1 1 5 5 1 3 3 3 33

‐ N.E. West Kingston St. Cross Section Amended soil, porous bike lane, raingarden, and porous sidewalk X X X X 5 5 3 3 5 1 5 3 1 1 5 37

‐ NE California Street Cross Section Multi‐use porous sidewalk, and raingarden strip X X X 5 5 5 5 1 5 1 5 1 1 5 39

Area surrounding the Pump Station Site

Dulay Rd NE at Village Green

VILLAGE GREEN



RECOMMENDED BMP


STRATEGY BENEFITS

AMENDED SOIL

BULB‐OUT

CISTERN

GREEN

GUTTER


H PLAN

TER

PORO

US PAVING

RAINGA

RDEN

PLANTER

RAINGA

RDEN

STRIP

TREE BO


SKINN

Y STREETS

VEGETATED STRIP

VEGETATED SWALE

WATER QUA


LOC

AL FLOOD CO

NTROL B

ENEFIT

(CONV

EYAN

CE AND

STORAGE)

PEDESTRIAN CO

NNECTIVITY

PUB

LIC SAFETY

PARKING

PUB

LIC/PRIVATE CO

LLABORATION

AESTHETICS


L OPPORTUN

ITY

REDUC

ED MAINTENAN

CE COSTS

EDU

CATION

AL OPPORTUN

ITY

COM

MUN

ITY PLAN

SUPPO

RT

TOTAL




G7 Firehouse TheatreMajor flooding/inadequate drainage concern for adjacent steep slopes down to ballfield, opportunity for pervious pavement, bioretention, public/private collaboration

X X 5 5 5 1 1 3 5 3 1 3 3 35

G6 Rolled curb and pervious shoulder could be installed (on West side of SR 104) to prevent run‐on to private parking lot X 3 5 3 3 1 5 3 3 1 1 3 31

G6 SR 104 at Mc Donald's Opportunity for pervious pavement parking lot X 3 3 1 1 1 1 3 1 3 1 3 21

G5 SR 104 at Arco Raingarden opportunity in lawn area between station and SR 104, opportunity for public and private collaboration X 5 5 1 3 1 5 5 1 1 1 3 31

G4 SR104 at Thriftway Grocery Store Very large impervious area; raingarden bulbouts on ends of parking rows, incremental change X X 5 5 1 3 1 5 5 1 1 3 3 33

G7 W 1st NE and 104Significant contributing area (indicated be large slot drain), potential raingarden on NE Georgia to reduce run‐off, raingarden in parking area

X 5 5 1 3 1 5 5 1 1 1 3 31

G7 SR104 and NE California St Opportunity for raingarden X 5 5 5 5 1 1 5 1 1 1 3 33

H6 Kingsville Loop Private drainage with no treatment, significant roadway erosion, terrace raingarden strip X 5 5 1 1 1 5 5 1 1 1 3 29

G3 SR104 at Kingston Lumber Millwork and SupplyIndicated as an area of concern, Paved depression picking up sediments and runoff, heavily paved area, and opportunity for public/private collaboration

X 5 5 1 3 1 3 5 1 1 1 3 29

F2 SR104 and Lindvog Rd NE Porous paving in the right of way X 3 5 1 1 1 1 3 1 1 1 3 21

F1 SR104 (North of Lindvog Rd NE) Opportunity for bioretention and public/private partnership X 5 5 1 3 1 5 5 1 1 1 3 31

H5 W 1st NE and NE Georgia Ave Corner of multi‐family housing, ditch currently borders street parking X 5 5 1 1 1 3 5 1 1 1 3 27

‐ SR104 Cross Section Pervious sidewalk with biofilter X X 5 5 5 3 1 3 5 5 1 1 5 39

Blue Water Inn

104 CORRIDOR



RECOMMENDED BMP


STRATEGY BENEFITS

AMENDED SOIL

BULB‐OUT

CISTERN

GREEN

GUTTER


H PLAN

TER

PORO

US PAVING

RAINGA

RDEN

PLANTER

RAINGA

RDEN

STRIP

TREE BO


SKINN

Y STREETS

VEGETATED STRIP

VEGETATED SWALE

WATER QUA


LOC

AL FLOOD CO

NTROL B

ENEFIT

(CONV

EYAN

CE AND

STORAGE)

PEDESTRIAN CO

NNECTIVITY

PUB

LIC SAFETY

PARKING

PUB

LIC/PRIVATE CO

LLABORATION

AESTHETICS


L OPPORTUN

ITY

REDUC

ED MAINTENAN

CE COSTS

EDU

CATION

AL OPPORTUN

ITY

COM

MUN

ITY PLAN

SUPPO

RT

TOTAL




F2 Lindvog Rd NE at 104 Raingarden for intersection flow, gateway opportunity X X 5 5 1 1 1 5 5 1 1 5 3 33

F2 Lindvog Rd NE Use exisitng planter on street for stormwater management/raingarden opportunity X 5 5 1 3 1 1 5 1 1 1 3 27

C5 Lindvog Rd NE Bike Lanes pervious bike lanes X 3 5 1 1 1 1 3 3 1 1 3 23

F5 Lindvog Rd NE by California St Bulb‐outs X X 5 5 3 5 1 1 5 3 1 1 3 33

Lindvog Rd NE COMMERCIAL CORRIDOR



RECOMMENDED BMP


STRATEGY BENEFITS

AMENDED SOIL

BULB‐OUT

CISTERN

GREEN

GUTTER


H PLAN

TER

PORO

US PAVING

RAINGA

RDEN

PLANTER

RAINGA

RDEN

STRIP

TREE BO


SKINN

Y STREETS

VEGETATED STRIP

VEGETATED SWALE

WATER QUA


LOC

AL FLOOD CO

NTROL B

ENEFIT

(CONV

EYAN

CE AND

STORAGE)

PEDESTRIAN CO

NNECTIVITY

PUB

LIC SAFETY

PARKING

PUB

LIC/PRIVATE CO

LLABORATION

AESTHETICS


L OPPORTUN

ITY

REDUC

ED MAINTENAN

CE COSTS

EDU

CATION

AL OPPORTUN

ITY

COM

MUN

ITY PLAN

SUPPO

RT

TOTAL




H8 NE East 2nd Street at Illinois Ave NE Opportunity for public/private collaboration and raingarden X 5 5 5 5 1 5 5 1 1 1 3 37

G10 Washington Blvd NE and NE East 2nd St Catch water from 2nd St in bulbout prior to reaching Washington Blvd X X X 5 5 1 5 1 5 5 1 3 1 3 35

I10 Washington Blvd NE (between NE East 2nd‐4th St) Area of concern, vegetated swale on north side (cut off ditch) 3 3 1 3 1 5 3 1 3 1 3 27

J9, K9, K8 Ohio Ave NE at Hiller Ln NESteep stream embankment an area of concern, remove curbcuts, opportunity for raingarden planter on north side of 104 near Hiller Ln.

X 5 5 1 5 1 5 5 1 3 1 3 35

H7, I7 NE Pennsylvania Ave Potential location for bulbouts or sidewalks with planters X 5 5 3 3 1 3 5 3 1 1 3 33

J5, K6 Kingsville Loop not much stormwater management ‐ add raingarden strip, potentially terraced X X 5 5 1 1 1 5 5 1 1 1 3 29

‐ Typical Connector Cross Section (Iowa, Ohio, Illinois) Multi‐use porous sidewalk and raingarden strip X X X 5 5 5 5 1 1 5 5 1 1 5 39

‐ Typical Local Cross Section (NE East 2nd, 3rd, 4th) Porous sidewalk and raingarden strip X X X 5 5 5 3 3 1 5 5 1 1 5 39

EAST SIDE AREA

X


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