final project report · 2019. 2. 5. · final project report watershed planning, implementation,...

2526 Regency Road, Suite 180, Lexington, Kentucky 40503 | Phone: (859) 977-2000 | www.thirdrockconsultants.com

Funded by 319(h) Nonpoint Source Implementation Grant

Watershed Planning, Implementation, and Education for Little Laurel River Watershed C9994861-11 11-11 PON2 1200001565 January 2012 – June 30, 2016

Project Application Title:

Grant Number:

Application Number:

MOA Number:

Project Period:

Prepared for: Steve Edge, Public Works Director 319(h) Grant Project Manager City of London 501 South Main Street London, KY 40741 (606) 864-5521

Prepared by: Jennifer Shelby, PE 319(h) Grant Project Consultant Third Rock Consultants, LLC 2526 Regency Road, Suite 180 Lexington, KY 40503 (859) 977-2000

Date: July 29, 2016

Final Project Report Watershed Planning, Implementation, and Education

for the Little Laurel River Watershed


for the Little Laurel River Watershed

The Kentucky Energy and Environment Cabinet (EEC) and the City of London do not discriminate on the basis of race, color, national origin, sex, age, religion, or disability. The EEC and the City of London will provide, on request, reasonable accommodations including auxiliary aids and services necessary to afford an individual with a disability an equal opportunity to participate in all services, programs and activities. To request materials in an alternative format, contact the Kentucky Division of Water, 300 Sower Blvd., Frankfort, KY 40601 or call (502) 564-3410. Hearing and speech-impaired persons can use the Kentucky Relay Service, a toll-free telecommunications device for the deaf (TDD). For voice to TDD, call 800-648-6057. For TDD to voice, call 800-648-6056.

Funding for this project was provided in part by a grant from the U.S. Environmental Protection Agency (USEPA) through the Kentucky Division of Water, Nonpoint Source Section, to the City of London as authorized by the Clean Water Act Amendments of 1987, §319(h) Nonpoint Source Implementation Grant #C9994861-11. Mention of trade names or commercial products, if any, does not constitute endorsement. This document was printed on recycled paper.


for the Little Laurel River Watershed Executive Summary

The activities performed with this grant award represent the culmination of ongoing projects to improve water quality in the Little Laurel River Watershed. This grant was the third Environmental Protection Agency (EPA) 319(h) grant to perform nonpoint source pollution control activities in this watershed. The goal was to continue best management practice (BMP) implementation and address nonpoint source pollution based on the findings and conclusions of previous watershed planning and BMP design performed during past grant cycles. The two projects implemented, Town Branch Remediation and Whitley Branch Wetland, were intended to improve stream water quality, prevent further stream degradation from nonpoint source pollution, progress toward attaining water quality standards, and reduce the pollutant load in the Little Laurel River Watershed.

For the Town Branch Remediation project, this grant funded the purchase and installation of a hydrodynamic separator, a stormwater treatment device to treat runoff from a waste (garbage) handling area located on property known as the “Town Branch site” that is owned by the City of London. The device is operating and succeeding at reducing velocity of stormwater runoff from the site and improving water quality in Town Branch, the receiving stream adjacent to the site and a tributary to the Little Laurel River, by removing total suspended solids (TSS) load.

For the Whitley Branch Wetland project, this grant funded master planning, design, and construction of stream/floodplain enhancement, wetland restoration/enhancement, and passive recreational/education facilities within a large site as part of the previously funded “Whitley Branch Restoration Project.” These amenities were constructed and site-specific native plantings were installed to further enhance the ecological function of the site. This large system improves water quality by storing and treating floodwaters. Also, a source of sediment to the Whitley Branch stream, the eroding streambanks, was eliminated through grading and stream-bank stabilization. Following the enhancement activities of bank lowering/grading and stabilization, the annual sediment loss from Whitley Branch within the project site is much lower. This site, with its access and trails, creates a connection between the community and a stream and wetland ecosystem. As the site continues to develop and be promoted by the City of London Tourism Board, it will spur community awareness, education, and interest in water quality in the watershed.


for the Little Laurel River Watershed Acknowledgements

The City of London wishes to thank the following people for their role in the progress that was made toward improving water quality in the Little Laurel Watershed:

• Mayor Troy Rudder, City of London

• Steve Edge, City of London

• Phillip Bentley, City of London

• Randy Gay, City of London

• Rick Cochrane, City of London

• Daniel Bishop, Kentucky Division of Water

• Jennifer Shelby, Third Rock Consultants


for the Little Laurel River Watershed Table of Contents

Prepared for the Kentucky Division of Water

Prepared by Third Rock Consultants, LLC, July 29, 2016 KY12-024 \2016 Final Report Little Laurel River Watershed 7-29-16

TABLE OF CONTENTS

INTRODUCTION AND BACKGROUND ............................................................................................................................ 1

A. Town Branch Remediation ...................................................................................................................................... 2

B. Whitley Branch Wetland ....................................................................................................................................... 2

MATERIALS AND METHODS ............................................................................................................................................... 2

A. Project Area Description ......................................................................................................................................... 2

B. Methods ..................................................................................................................................................................... 7

RESULTS AND DISCUSSION ............................................................................................................................................... 8

A. Town Branch Remediation ...................................................................................................................................... 8

B. Whitley Branch Wetland ....................................................................................................................................... 8

C. Project Team Meetings ........................................................................................................................................... 9

CONCLUSIONS .................................................................................................................................................................... 9

A. Measures of Success ............................................................................................................................................. 10

B. Measures of Meeting Objectives ....................................................................................................................... 11

C. Lessons Learned .................................................................................................................................................... 14

D. Recommendations ................................................................................................................................................. 15

LITERATURE CITED ............................................................................................................................................................. 15

Appendix A – Financial and Administrative Closeout & Budget Summary

Appendix B – BMP Implementation Plans

Appendix C – Town Branch Remediation Project Photographs

Appendix D – Whitley Branch Wetland Project Photographs

Appendix E – Whitley Branch Trail and Access Design


for the Little Laurel River Watershed Page 1 of 15 (Plus Appendices)



INTRODUCTION AND BACKGROUND

Third Rock Consultants, LLC (Third Rock) was first awarded a 319(h) grant in 2004 to develop a Watershed Plan (Third Rock 2007) that identified and ranked the sources of aquatic impairment in the Corbin City Reservoir watershed, which includes the subwatersheds of the Laurel River, Little Laurel River, and Robinson Creek. The reservoir is the drinking water source for the City of Corbin, Kentucky, but the watershed to the reservoir includes the City of London. The reservoir and many stream reaches within the 127 mi2 watershed are listed as 1st priority impaired water bodies/streams in Kentucky’s 303(d) list of impaired waters. During the development of the Watershed Plan, Third Rock amassed many layers of digital data for the watershed, including land use, vegetative cover, land slope, soil types, and sewer networks. Additionally, physical stream data was obtained using the EPA’s Rapid Bio-assessment Protocol (RBP) and stream water quality data were collected over time throughout the watershed. The Watershed Plan identified and ranked the impaired stream reaches, then subsequently prioritized sites for restoration and BMP implementation.

Following successful completion of the Watershed Plan, Third Rock applied for and was awarded a second 319(h) grant in 2007 to implement water quality improvement projects throughout the watershed. The grant-funded projects included the design of two stream enhancement projects on tributaries to the Little Laurel River - one on Town Branch within property owned by the City of London that is used as a waste transfer station and another on Whitley Branch that included extensive adjacent wetland restoration. Through efforts during the 319(h) grant work, the City of London acquired the Whitley Branch project site, a 75.5-acre bottomland area adjacent to a reach of Whitley Branch. The purchase was made possible by a Kentucky Heritage Land Conservation Fund grant.

With Third Rock’s guidance, the City of London applied for and was awarded this third 319(h) grant in 2012 to continue the BMP implementation and work toward water quality improvements in the Little Laurel River Watershed. The overall project was renamed the “Watershed Planning, Implementation, and Education for Little Laurel Watershed” to be more inclusive and representative of the actual geographic area of focus and projects proposed. The focus of the 2012 grant was to implement remediation activities already designed for the Town Branch and Whitley Branch Wetland sites, as well as additional master planning activities within the Whitley Branch site. As identified in the original grant application, the overall project goal was integrative planning and implementation of water quality BMPs and educational and recreational facilities to (1) improve water quality and (2) create a connection between the community and the water resources and unique ecology of the Little Laurel River watershed. The intention was to achieve the goals through the following objectives with the Town Branch project: (1) the reduction of streambank erosion, improvement of floodplain and riparian function, reduction of velocity of stormwater runoff to substantially improve water quality in Town Branch, a tributary to the Little Laurel River; and (2) the creation of an educational signage and accompanying materials produce for the purpose of increase the public’s awareness of the sources and treatment of nonpoint source pollution impacting Town Branch. The particular objectives for meeting the goals with the Whitley Branch Wetland project are to identify and design BMPs and educational and recreational facilities that (1) improve water quality; (2) create a connection between the community and invaluable water resources, i.e. Whitley Branch and the adjoining wetland; (3) provide the opportunity, incentive and access for the public to visit and experience unique ecology and wildlife of the Whitley Branch restoration site; and (4) spur community awareness, education, and interest in water quality in the watershed.





This report summarizes the work performed under the 2012 grant award toward meeting the project goals and objectives. Appendix A contains the financial and administrative closeout for the project, including a summary and description of project expenditures.

A. Town Branch Remediation

During this grant cycle, the project at Town Branch was revised to focus on the installation of a hydrodynamic separator, a stormwater treatment device to treat runoff from a waste (garbage) handling area located on City of London’s property. This decision was made based on physical constraints and maintenance abilities at the site, along with the immediate need for water quality improvement. The separator device allows direct treatment of polluted runoff prior to its discharge, which ultimately enters Town Branch. The stormwater enters the treatment unit through an inlet grate. The unit creates a swirling vortex of water that forces floatables and solids to the center of the separation chamber, trapping the floatables. Sediment in the runoff settles into an isolated sump. All pollutants remain in the treatment unit until they are removed during maintenance.

B. Whitley Branch Wetland

In the course of this project, the stream at the Whitley Branch (approximately 2,200 linear feet) site was improved by lowering, regrading, and stabilizing (with degradable erosion control blanket) the existing steep and eroding stream banks. The project included excavation of a floodplain on both sides of the stream to re-establish the hydrologic connection between the stream and wetland, and therefore facilitate pollutant reduction in Whitley Branch. The floodplain was planted with a mix of site-specific, native trees (as bareroot seedlings). Wetland areas were also excavated to enhance floodwater storage within the site and restore the site to a functioning forested floodplain wetland system. Trails and boardwalks were constructed to make the site accessible for educational opportunities.

MATERIALS AND METHODS

A. Project Area Description

Figure 1, page 4 shows the location of the two projects performed by this 319(h) grant relative to each other and the Little Laurel River watershed.

1. Town Branch Remediation

Geographic Coordinates: 37.117906N; -84.056719W (NAD 1983) 12-Digit HUC: 051301010802, Little Laurel River Town Branch is a perennial headwater tributary to the Little Laurel River that drains an urban area of approximately 2.2 square miles. Town Branch stream runs adjacent to the City of London’s waste transfer and recycling station, located on TLC Lane, just off Highway 192 in London, Kentucky. This stream was identified as a priority location for water quality improvement in the Corbin City Reservoir Watershed Plan (Third Rock 2007), which was developed using an EPA 319(h) grant awarded in 2004. Town Branch drains London’s urban





center and as a result it has one of the highest concentration of pollutants, second only to Whitley Branch, per findings of the Watershed plan. This project purchased and installed a stormwater treatment device to reduce polluted runoff from the waste transfer area to Town Branch. Figure 2, page 5 shows the location of the project.

2. Whitley Branch Wetland

Geographic Coordinates: 37.101759N; -84.057622 W (NAD 1983) 12-Digit HUC: 051301010802, Little Laurel River Whitley Branch is a perennial headwater stream that drains an urban area of approximately 2.6 square miles. Whitley Branch conveys significant loadings of sediment, bacteria, and nutrients, as identified in the Watershed Plan (Third Rock 2007), and is a primary source of pollutants in the 127 square miles (mi2) Corbin City Reservoir watershed (which includes the Little Laurel River watershed). The Whitley Branch Wetland site was identified in the Watershed Plan as a location for reducing pollutant loadings in Whitley Branch. The City of London owns the approximately 2,200 feet of project stream within the adjacent 75.5-acre bottomland area. The purchase was made possible in 2009 by a Kentucky Heritage Land Conservation Fund grant during a series of 319(h) granted-funded efforts. The site is near the City of London, Kentucky and is bounded by CSX railroad tracks on the west, KY 229 to the north, and the Little Laurel River to the east.

Prior to its drainage for farming, this area was a rare example of eastern Kentucky floodplain forest. The project stream segment had been straightened and as a result was highly incised and detached from an adjacent floodplain. The Whitley Branch Wetland restoration plan proposed stream enhancement on a section of Whitley Branch and its adjacent floodplain beginning just downstream of a CSX railroad culvert and terminating approximately 2,200 feet downstream, at a point approximately 105 feet upstream of the stream’s confluence with the Little Laurel River. Wetland enhancement activities and access trails were proposed throughout the site. Figure 3, page 6 shows the location of the project.

¬«687

Hal Rogers Parkway

¬«80

§̈¦75

¬«192

¬«229£¤25

¬«80

§̈¦75

Whitley Branch Site

Town Branch Site

Little Laurel RiverWatershed

Little LaurelRiver

Laurel River

London

LAUREL

CLAY

KNOX

Kentucky

Illinois

OhioIndiana

Tennessee

Virginia

WestVirginia

Prepared by:Third Rock Consultants, LLC2526 Regency Road, Suite 180Lexington, Kentucky 40503

Figure 1Project Vicinity

319(h) Grant Final Project Report

Prepared for:City of London

501 South Main StreetLondon, Kentucky 40741

Document Path: P:\Project_Files\Kentucky\KY12-024_London_WhitleyTB_BMPs\Mapping\GIS\1_Vicinity_Figure.mxd las 5/12/16

N.T.S.

N.T.S.

City of LondonWaste Transfer Station

Locationof Hydrodynamic

SeparatorTown Branch

¬«192

TLC LANE

Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS,USDA, USGS, AEX, Getmapping, Aerogrid, IGN, IGP, swisstopo, and the GISUser Community

Prepared by:Third Rock Consultants, LLC2526 Regency Road, Suite 180Lexington, Kentucky 40503

Figure 2 - AerialTown Branch Site

319(h) Grant Final Project Report0 150 30075

Feet

Document Path: P:\Project_Files\Kentucky\KY12-024_London_WhitleyTB_BMPs\Mapping\GIS\2_Town_Branch_Exhibit_Aerial.mxd las 5/10/16

LegendTown BranchLocation of Hydrodynamic Separator



¬«229

Whitley Branch

Little Laurel River

Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS,USDA, USGS, AEX, Getmapping, Aerogrid, IGN, IGP, swisstopo, and the GISUser Community

Prepared by:Third Rock Consultants, LLC2526 Regency Road, Suite 180Lexington, Kentucky 40503 0 200 400100

Feet

Document Path: P:\Project_Files\Kentucky\KY12-024_London_WhitleyTB_BMPs\Mapping\GIS\3_Whitley_Branch_Exhibit_Aerial.mxd las 5/10/16

LegendExisting StreamEnhanced Wetland AreaLow Impact AccessViewing DeckWhitley Branch Stream Enhancement AreaLow Impact Trails



Figure 3 - AerialWhitley Branch Wetland Site

319(h) Grant Final Project Report





B. Methods


Plan sheets for the Town Branch remediation design were included in the Final Report for the 319(h) grant awarded in 2007 (Third Rock 2011). The BMPs planned for implementation on this site were addressed in a KDOW-approved BMP Implementation Plan (Appendix B). Remediation design plans previously developed were to improve 500 linear feet of Town Branch through excavation of a floodplain bench within the site, construct a water quality swale to treat a portion of the site’s stormwater runoff, and purchase/install a hydrodynamic separator stormwater treatment device. The remediation plans were reviewed during this grant cycle, and ultimately the entire design was not implemented due to site and budget constraints that developed over time (from one grant cycle to the next). The purchase and installation of a hydrodynamic separator device was accomplished with this grant.

The hydrodynamic separator for the Town Branch site was specified by Third Rock engineers along with engineers from the device’s supplier. It was selected based on site-specific treatment requirements, target pollutants, and specific characteristics/layout and drainage patterns of the site. The selected separator system is widely accepted for effective removal of solids from runoff.


As part of the previous 319(h) grant-funded work in this watershed (awarded in 2007), design plans were developed (2010) to enhance 2,200 linear feet of Whitley Branch, excavate niche wetland habitats (approximately 5 acres), maximize wetland restoration within the 75.5-acre site (approximately 25 acres), facilitate the storage of runoff within the site to achieve water quality treatment, and plant the site with native species.

During this grant, master planning activities were performed by a Third Rock landscape architect to enhance the site with access, trails, and educational components. An overall design goal was to offer ecological and recreational benefits and opportunities for public education, making the site a true asset to the community. Plan sheets for the Whitley Branch remediation effort were included in the Final Report for the 319(h) grant awarded in 2008 (Third Rock 2011). The project BMPs implemented on this site were addressed in a KDOW-approved BMP Implementation Plan (Appendix B). Prior to any construction, all state and federal permits were acquired and conditions met.

3. Project Team Meetings

At the project initiation, the project team consisted of representatives from throughout the project watershed and included representatives from environmental groups, local governments, state and federal agencies, and interested citizens. Throughout the previous two grant periods, a group of stakeholders (named RAILL – Restoration Action Initiative in the Little Laurel) was active and essential to project planning and implementation efforts.





RESULTS AND DISCUSSION

A. Town Branch Remediation

The hydrodynamic separator was installed by the City of London in December of 2015, with oversight from Third Rock engineers and an engineer from the device’s supplier. The City of London provided the excavation, placement of rock bedding/backfill, and leveling of the unit required to install the unit appropriately. Additionally, the City of London installed pipes and performed site grading necessary to put the unit into use. The site was graded to maximize the amount of runoff treated within the unit’s capacity. The separator device allows direct treatment of polluted runoff prior to its discharge, which ultimately enters Town Branch. The stormwater enters the treatment unit through an inlet grate. The unit creates a swirling vortex of water that forces floatables and solids to the center of the separation chamber, trapping the floatables. Sediment in the runoff settles into an isolated sump. All pollutants remain in the treatment unit until they are removed during maintenance. The City of London has committed to regular maintenance of the unit, which includes pollutant removal with a vacuum truck.

Signage describing the stormwater device installed at the Town Branch site will not be produced. The device is not in an appropriate location to warrant signage and inviting visitors to this location would present safety issues since it is a busy area where trucks enter/exit and transfer waste (garbage).

Town Branch Remediation project photographs are included as Appendix C.

B. Whitley Branch Wetland

The full design for the Whitley Branch Wetland site was implemented with this grant in phases, based on ground/wetness conditions within the site. The stream bank grading, in-stream structure installation, floodplain excavation, and wetland excavation was performed during the dry, summer and fall months of 2013, 2014, and 2015. This work was performed using City of London equipment and personnel with oversight from Third Rock engineers. The overall site design plan included incorporating a diversity of wetland habitats (approximately 25 acres of open water, emergent, and bottomland hardwood wetlands) into the stream corridor, including vernal pools that will store and treat floodwater.

Plantings were installed during the dormant season of 2014 (spring). Site-specific, native vegetation was planted in the riparian corridor and wetland areas enhance the terrestrial habitat. A large Kentucky Arbor Day event was held at the site in 2014 with volunteers planting over 500 tree seedlings adjacent to the stream. The City of London installed approximately 3,220 trees total on the site.

During this grant cycle, master planning was performed for the Whitley Branch Wetland site to incorporate natural surface trails, low impact site access/parking, wetland feature viewing decks, and kiosks for educational signage. Design plans containing trails and access features were produce. Final trail construction and installation of viewing platforms and signage kiosks was performed in the spring of 2016 by the City of London. The design also incorporated trails and educational





components, making this a true asset to the community, offering ecological, educational, and recreational benefits.

Whitley Branch Wetland project photographs are included as Appendix D.

C. Project Team Meetings

As the project progressed during this grant cycle, it was difficult to maintain and utilize the project team. The City of London, the grant holder this cycle, emerged as the key stakeholder and gave strong local leadership for implementing the Town Branch and Whitley Branch Wetland projects within city-owned properties. Members of the City of London government and Third Rock continued to meet during the implementation of the projects.

CONCLUSIONS

Third Rock was first awarded a 319(h) grant in 2004 to develop a Watershed Plan to identify and rank the sources of aquatic impairment in the Corbin City Reservoir watershed (Third Rock 2007). Following successful completion of the Corbin City Reservoir Watershed Plan, Third Rock applied for and was awarded a second 319(h) grant in 2007 to implement water quality improvement projects throughout the watershed.

With Third Rock’s guidance, the City of London applied for and was awarded this third 319(h) grant in 2012 to continue the BMP implementation and work toward water quality improvements in the Little Laurel River Watershed. This report details the implementation work performed during the 2012 grant period to execute remediation activities at the Town Branch and Whitley Branch Wetland sites.

Remediation activities at the Town Branch and Whitley Branch Wetland sites were completed during this grant cycle. A stormwater treatment device, a hydrodynamic separator, was purchased and installed at the Town Branch site and is operating to capture and treat polluted runoff from the City of London’s waste transfer station. This device succeeds at reducing velocity of stormwater runoff from the site and improves water quality in Town Branch, the receiving stream adjacent to the site and a tributary to the Little Laurel River.

Construction was performed to stabilize streambanks, excavate a streamside floodplain, and excavate wetland areas at the Whitley Branch Wetland Site. Master planning was performed to specify access to the site, low-impact trails, and educational components. These amenities were constructed. Site-specific native plantings were installed to further enhance the ecological function of the site. This site, with its access and trails, creates a connection between the community and a stream and wetland ecosystem that includes Whitley Branch, an invaluable water resources and tributary to the Little Laurel River. A marketable logo was produced for the site during the master planning activities and can be used to promote the site for public visitation and educational opportunities. The restored site is very attractive and offers an opportunity for visitors to view the unique wetland niche habitats developed by the project and diversity of wildlife it fosters. This large system improves water quality by storing and treating floodwaters. Also, a source of sediment to the stream, the eroding streambanks, was eliminated through grading and stabilization. As the site continues to develop and be promoted by the City of London Tourism Board, it will spur community awareness, education, and interest in water quality in the watershed.





A. Measures of Success

In Section 21 of the Project Grant Application the following items were listed as anticipated Project Measures of Success. The outcome of each item is summarized below.

1. Maintenance of a RAILL website.

Initially, the RAILL website was maintained, but as the project progressed and work was focused on implementing activities at the Town Branch and Whitley Branch Wetland sites, it became difficult to maintain and utilize the project team and updating the website was not prioritized.

2. Approval by KDOW of BMP Implementation Plans for both the Town Branch and Whitley Branch Wetland projects.

Approved BMP Implementation Plans were achieved for both the Town Branch and Whitley Branch Wetland projects (Appendix B).

3. Construction of stream and wetland restoration and implementation of BMPs along Town Branch.

An effective BMP (hydrodynamic separator) was purchased and installed at the Town Branch site.

4. Production of a RAILL-KDOW approved Master Plan for the Whitley Branch Wetland site.

Master planning was performed for the Whitley Branch Wetland site to incorporate natural surface trails, low impact site access/parking, wetland feature viewing decks, and kiosks for educational signage.

5. Production of construction drawings suitable for the implementation of Phase II of the Whitley Branch Restoration project.

Design plans containing trails, access features, and educational kiosks were produced and are included as Appendix E.

6. Construction of Whitley Branch Restoration Phase II BMPs and educational/recreational facilities.

The stream bank grading/stabilization, in-stream structure installation, floodplain excavation, and wetland excavation was performed. Plantings were installed. Final trails, site access, wetland viewing platforms, and signage kiosks were constructed.

7. As-built surveys and photographs that demonstrate stable and functioning streams and water quality BMPs as designed and implemented by the project team.

Construction oversight was provided by Third Rock engineers during installation of BMPs. Locations of excavation (stream floodplain and wetland areas) and trails at the Whitley





Branch Wetland site were verified after construction by Third Rock engineers. Photographs are in Appendix C.

8. Report load reduction estimates for all BMPs installed during the project timeframe.

i. Town Branch Remediation

The hydrodynamic separator installed at the Town Branch site during this grant cycle aimed to reduce total suspended solids (TSS) load to the adjacent Town Branch stream. Based on the testing performed for this stormwater treatment device, 80% TSS removal is expected when treating the design water quality flow of 1.34 ft3/sec (assuming average particle size of 125 microns for particles being treated). Thus, 80% TSS removal is expected from runoff generated at the waste transfer station and treated by the unit under design flow conditions.

ii. Whitley Branch Wetland

The stream bank grading and stabilization work performed during this grant cycle aimed to reduce sediment load in Whitley Branch. Annual streambank erosion was estimated for Whitley Branch in its degraded condition, within the project site, in the Final Report for the 2008 319(h) grant (Third Rock 2011). For the degraded, actively eroding stream in the pre-enhancement condition, the 2011 report estimated 3.7 tons of sediment lost annually through bank erosion. Following the enhancement activities of bank lowering/grading and stabilization, the annual sediment loss from Whitley Branch within the project site is much lower. Using the same algorithms and methods applied in the 2011 Annual Report, the annual sediment loss from this site in its stable condition is estimated to be 0.7 tons. This represents an 80% reduction in the annual sediment load.

9. Record of public use of Whitley Branch Restoration site facilities.

The management and maintenance of this facility has been turned over to the City of London Tourism Board. The site will soon be available for public use and/or use by school groups, etc. for education opportunities.

B. Measures of Meeting Objectives

In Section 16 of the Project Grant Application the following items were listed as project objectives and activities for meeting the overall watershed goal of integrative planning and implementation of water quality BMPs and educational and recreational facilities to (1) improve water quality and (2) create a connection between the community and the water resources and unique ecology of the Little Laurel River watershed. The outcome of each item is summarized below.






Objectives

i. Reduce streambank erosion, improve floodplain and riparian function, and reduce velocity of stormwater runoff to substantially improve water quality in Town Branch, a tributary to the Little Laurel River.

ii. Create educational signage and accompanying materials for the purpose of increasing

the public’s awareness of the sources and treatment of nonpoint source pollution impacting Town Branch.

Activities

i. Review and resubmit a project BMP IP, completed construction plans, and permits secured to the KDOW for approval.

ii. Identify permit requirements and secure permits.

iii. Construct remedial restoration and enhancement and implement KDOW approved

BMPs along Town Branch and an adjoining wetland.

iv. Engage and involve RAILL to achieve successful project implementation.

v. Develop and submit signage for the Town Branch site to KDOW for review and approval.

vi. Implement basic signage describing the Town Branch site and identifying stream and

wetland restoration and enhancements and BMPs.

vii. Utilize RAILL to promote and publicize the project.

Outcomes

i. A BMP Implementation Plan was submitted and approved (Appendix B). Design specification was performed for the hydrodynamic separator, the only stormwater treatment BMP installed on the site.

ii. Since stream and wetland activities were not performed due to site and budget

constraints, permits were not necessary.

iii. A hydrodynamic separator, a treatment device that effectively removes solids from runoff was purchases and installed to capture and treat polluted runoff from the City of London’s waste (garbage) transfer area. This device will improve water quality in the receiving stream, Town Branch.

iv. It was difficult to maintain and utilize the project team. The City of London, the grant

holder this cycle, emerged as the key stakeholder and gave strong local leadership for





implementing the Town Branch project within city-owned property. Members of the City of London government and Third Rock Consultants continued to meet during the implementation of the project.

v. Signage describing the stormwater device installed at the Town Branch site will not be

produced. The device is not in an appropriate location to warrant signage and inviting visitors to this location would present safety issues since it is a busy area where trucks enter/exit and transfer waste (garbage).

vi. Signage describing the stormwater device installed at the Town Branch site is not

appropriate and will not be produced.

vii. It was difficult to maintain and utilize the project team. The City of London will promote and publicize the project as appropriate.


Objectives i. Identify and design BMPs and educational and recreational facilities that

a. Improve water quality. b. Create a connection between the community and invaluable water resources, i.e.

Whitley Branch and the adjoining wetland. c. Provide the opportunity, incentive and access for the public to visit and

experience unique ecology and wildlife of the Whitley Branch restoration site. d. Spur community awareness, education, and interest in water quality in the

watershed.

Activities

i. Develop a master plan for the Whitley Branch Restoration site to incorporate additional water quality BMPs and educational and recreational facilities (natural surface trails, low impact site access/parking, interpretative boardwalks and overlooks, educational kiosks).

ii. Engage RAILL in the master planning and subsequent design process.

iii. Following the planning process, select specific BMPs and infrastructure and submit a BMP IP and designs to KDOW for approval.

iv. Submit all educational components to KDOW for review and approval.





v. Supervise implementation of BMPs and construction of facilities in conjunction by the City of London in conjunction with the City’s construction of the restoration and enhancement of the site designed and permitted in Phase I.

vi. Utilize RAILL stakeholders group to promote and publicize the project.

Outcomes

i. Master planning was performed for the Whitley Branch Wetland site to incorporate natural surface trails, low impact site access/parking, wetland feature viewing decks, and kiosks for educational signage. Design plans containing trails and access features were produced (Appendix E).

ii. It was difficult to maintain and utilize the project team. The City of London, the grant

holder this cycle, emerged as the key stakeholder and gave strong local leadership for implementing the Whitley Branch Wetland project within city-owned property. Members of the City of London government and Third Rock Consultants continued to meet during the implementation of the project.

iii. A BMP Implementation Plan (Appendix C) and project design was submitted and

approved. Design plans containing trails and access features are included as Appendix E.

iv. Design of locations for educational components (trails, viewing decks, and kiosks for

educational signage) was provided to KDOW for review and approval. Signage development is still in progress.

v. Third Rock engineers and biologists provided oversight for the construction of BMPs

(stream enhancement, floodplain excavation, wetland excavation, natural surface trails, site access, viewing decks, and kiosks for educational signage) and vegetation installation (planting of bareroot seedlings). BMP construction was performed the City of London.

vi. It was difficult to maintain and utilize the project team. The City of London will promote

and publicize the project as appropriate. The management and maintenance of this facility has been turned over to the City of London Tourism Board. The site will soon be available for public use and/or use by school groups, etc. for education opportunities.

C. Lessons Learned

The most significant lesson learned in this project period was the importance of not underestimating the time that needs to be invested in public education, partnering, and relationship-building in order to implement projects. Often the work needed is in addition to each stakeholder’s regular duties, thus achieving project goals can take longer than expected. Relationships are key to implementing and maintaining watershed projects. Having good relationships with a focused project team can eventually lead to the successful implementation of BMPs and other watershed remediation projects.





D. Recommendations

Though the BMPs that were installed are successfully meeting their water quality-related functions, access and educational outreach activities associated with the Whitley Branch Wetland project could be enhanced. The management and maintenance of this facility has been turned over to the City of London Tourism Board. The site will soon be available for public use and/or use by school groups, etc. for education opportunities as the Board develops ways to allow safe access to the site, but control vandalism and inappropriate site activities. In general, efforts to implement additional water quality improvement projects, guided by the Watershed Plan (Third Rock 2007), are recommended. There are many BMP and remediation projects that can be implemented that will benefit the watershed. In order to increase likelihood of implementing future projects, the remaining project stakeholders should support efforts to re-vitalize RAILL. A strong project partners group will be essential for making additional improvements in the watershed.

LITERATURE CITED Contech Engineered Solutions (Contech). 2010. NJCAT Technology Verification for High Efficiency Continuous Deflective Separator (CDS). Contech Construction Products, Inc.

Third Rock Consultants, LLC (Third Rock). 2007. Corbin City Reservoir Laurel River Watershed Implementation Plan – Watershed Based Plan. Prepared for Kentucky Division of Water, Watershed Management Branch using an EPA 319(h) Nonpoint Source Pollution Control grant.

Third Rock Consultants, LLC (Third Rock). 2011. Water Quality Improvement Projects, Corbin City Reservoir Watershed: Final Report. Grant Number #C9994861-07. Prepared for Kentucky Division of Water, Watershed Management Branch as required by EPA 319(h) Nonpoint Source Pollution Control grant.

APPENDIX A

Appendix A Financial and Administrative Closeout and Budget Summary

Workplan Outputs – The following table outlines the work product associated with this grant and gives dates of completion.

Milestone Completion Date

1 Contact project partners and update/engage project team August 2012

2 Whitley Branch Project: Review and update permit required for project construction August 2012

3 Whitley Branch Project: Master planning for entire site to incorporate access and educational components October 2012

4 Whitley Branch Project: Construct wetland areas September 2015

5 Whitley Branch Project: Perform streambank grading/stabilization, floodplain excavation, and seeding March 2014

6 Whitley Branch Project: Riparian tree planting April 2014

7 Whitley Branch Project: Construct educational infrastructure, e.g., trails, boardwalks/overlooks February 2016

8 Town Branch Project: Final specification and order of water quality device (Hydrodynamic Separator) September 2015

9 Town Branch Project: Installation of water quality device (Hydrodynamic Separator) December 2015

10 Whitley Branch Project: Remove construction road and install low water crossing February 2016

11 Prepare and submit Final Report to KDOW May 2016 Budget Summary – The following table shows project expenditures proposed in the original grant application (2012).

Category Design and

Implementation Project

Management

Education, Training, or Outreach Monitoring

Technical Assistance

Total Amount

Personnel $15,054 $7,095 $3,196 $25,345

Supplies $5,470 $5,470

Equipment $38,105 $38,105

Travel $1,130 $530 $315 $1975

Contractual $152,526 $152,526 Operating Costs $21,487 $3,057 $2,035 $26,579

Other $0

TOTAL $233,772 $10,682 $5,546 $250,000

Appendix A Cont. Financial and Administrative Closeout and Budget Summary

The following table is the Budget Summary dated August 9, 2012.

Category Design and


Management



Total Amount

Personnel $33,500 $1,440 $34,940

Supplies $980 $980

Equipment $31,745 $31,745

Travel $1,130 $530 $315 $1,975

Contractual $91,640 $2,500 $49,846 $143,986 Operating Costs $11,687 $22,652 $2,035 $36,374

Other $0

TOTAL $170,682 $23,182 $6,290 $0 $49,846 $250,000

The following table is the Budget Summary dated January 29, 2014.

Category Design and


Management



Total Amount

Personnel $42,475 $1,440 $43,915

Supplies $980 $980

Equipment $39,745 $39,745

Travel $0

Contractual $76,640 $2,500 $49,846 $128,986 Operating Costs $11,687 $22,652 $2,035 $36,374

Other $0

TOTAL $171,527 $22,652 $5,975 $0 $49,846 $250,000


The following tables are Budget Summaries for the actual, final breakdown of project expenditures, as invoiced May 31, 2016.

Category Design and


Management



Total Amount

Personnel $42,475 $1,440 $43,915

Supplies $0

Equipment $67,252 $67,252

Travel $0

Contractual $52,613 $49,846 $102,459 Operating Costs $11,687 $22,652 $2,035 $36,374

Other $0

TOTAL $174,027 $22,652 $3,475 $0 $49,846 $250,000

Category Section 319(h) Non-Federal

Match Total

Personnel $43,915 $43,915

Supplies $0

Equipment $34,000 $33,252 $67,252

Travel $0

Contractual $93,348 $9,111 $102,459

Operating Costs $22,652 $13,722 $36,374

Other

TOTAL $150,000 $100,000 $250,000

Budget Narrative

The original budget was been revised to reflect the work that was performed. The budget narrative below describes the final distribution of work in each budget category and whether those tasks were Section 319(h) or Non-Federal Match funded. Personnel – Section 319(h)

None


Personnel – Non-Federal Match Labor hours associated with:

• Construction tasks • Transporting and operating machinery • Planting trees • Building/ installing project components (kiosks, viewing decks, hydrodynamic separator) • Coordination among city staff and design consultant • Coordination of public involvement opportunities (Arbor Day volunteer planting event)

Note: None of the components outlined above utilize fringe in labor rates.

Supplies – Section 319(h)

None Supplies – Non-Federal Match

None Equipment – Section 319(h)

• Specialized equipment rental for excavation and construction of Whitley Branch Wetland project

• Crane rental for installation of hydrodynamic separator at Town Branch site Equipment – Non-Federal Match

• Specialized equipment rental for excavation and construction of Whitley Branch Wetland project

• Crane rental for installation of hydrodynamic separator at Town Branch site

Travel – Section 319(h)

None Travel – Non-Federal Match

None Contractual – Section 319(h)

• Hydrodynamic separator specification, delivery, installation oversight, technical assistance • Whitley Branch Wetland consultant construction oversight/inspection services/technical

assistance • Whitley Branch Wetland consultant master planning/design


Contractual – Non-Federal Match

• Whitley Branch Wetland consultant technical assistance • Whitley Branch Wetland portion of vegetation planting

Operating Costs – Section 319(h)

• Tasks associated with grant administration, tracking match, invoicing, and project reporting • Fuel for equipment transportation and usage • Costs to bring hydrodynamic separator “on line” • Advertisements and outreach • Training sessions

Other – Section 319(h)

None Other – Non-Federal Match

None Special Grant Conditions This project had no special grant conditions.

APPENDIX B

April 2013 Page 1 of 4

BMP Implementation Plan Town Branch Stream Enhancement

London, Laurel County, KY Third Rock Consultants, LLC

April 30, 2013

Technologies to be Installed The proposed Best Management Practices (BMP) project described in this BMP Implementation Plan (BMPIP) is the restoration of a segment of Town Branch, a tributary to the Little Laurel River. The proposed project site is completely within property owned by the City of London and is commonly referred to as the “Transfer Station.” It is located just north of the intersection of KY 192 and the CSX railroad tracks. Stream enhancement of Town Branch will provide bank stabilization, reduce bank erosion, improve aquatic habitat through longitudinal diversity, improve floodplain access and flood storage, and promote nutrient cycling/pollution treatment. Two BMPs are proposed for this site: 1. Natural channel design (NRCS codes 322 – Channel Bank Vegetation and 580 – Streambank and Shoreline Protection) of approximately 700 linear feet (LF) of a highly incised and channelized section of the perennial stream. The stream restoration would involve the following:

• Create a bankfull bench • Provide access to the floodplain, flood storage, and nutrient/sediment filtration • Stabilize banks • Develop riparian zone habitat • Erosion Prevention and Sediment Control BMPs will be utilized during the restoration process

2. Installation of a Hydrodynamic Separator unit (NRCS code 570 – Stormwater Runoff Control) to screen and separate debris, sediment, and oil from stormwater runoff.

• Reduce pollutant load The stream restoration will utilize natural channel design practices to restore and enhance approximately 700 feet of impaired existing stream that has been channelized and severely impacted by past and present land use practices. Channelization of the existing stream has made it deeper due to the increased velocity in the stream. In addition, much of the floodplain has been filled in, which increases stream bank erosion, as the channel can no longer access the floodplain during storm events. Natural channel design will restore access to the floodplain, which has the dual effect of filtering nutrients and sediment from the floodwaters before they recede to normal flow conditions.


The existing channel will be enhanced in several ways. Fieldwork will be performed to determine appropriate bankfull dimensions (width, depth, and cross-sectional area). The determined bankfull dimensions will be used to design the channel and return hydrologic function to the stream. Existing stream banks will be laid back to create a bankfull bench. Floodplain access will be provided on both sides of the creek to promote floodplain storage, nutrient filtration, and sediment removal. Additionally, a riparian buffer zone will be added and enhanced on both sides of the creek. A hydrodynamic separator unit will be installed within the Transfer Station to collect and treat stormwater runoff before it enters the creek. The unit will consist of an inlet which allows water to enter the separator unit for separation and screening before it flows through the outlet and ultimately into Town Branch. All staging and storing of construction equipment will be conducted in such a way that site disturbance and soil compaction is minimized. Erosion and sediment controls shall be implemented as specified within the design plans, including the following specific items. Straw wattles will be used to protect streams from sediment-laden runoff. Small diversion berms (coupled with rock check outlets) could be utilized to divert clean runoff around an area under construction. Upland areas have been designated for the placement of any clean fill generated by project excavation. Silt fence shall be installed around any soil stockpiles during construction such that sediment is controlled and does not enter the stream. BMP Selection Process and How BMP is Targeted to Specific Location Data gathered and presented in the approved Corbin Reservoir Watershed Plan indicated that runoff from the City of London is the most significant source of pollution to the Corbin Reservoir. Goals of the subsequent Implementation Plan are to reduce pollutants (nutrients and sediment) from the London urban area through a series of Best Management Practices (BMPs). BMPs are being selected and located in and around London in order to reduce the amount of sediment and nutrients entering the Little Laurel River and ultimately the Corbin City Reservoir. The type and location of BMPs are being chosen based on the data gathered from the Watershed Plan. Town Branch, just upstream of KY 192 in London, is the focus of this individual Implementation Plan as a result of elevated TP and TSS data at this site as presented in the watershed plan. The proposed site of remediation is downstream of a large stockyard with poor waste management practices, several industries, and large impervious areas. Town Branch, a tributary to the Little Laurel River, is on the Kentucky 303(d) list of impaired waters. This tributary is impaired for Aquatic Life uses (Nonsupport) due to physical substrate habitat alterations and sedimentation/siltation associated with loss of riparian habitat. Restoration of the stream would provide the most effective manner known in which to reduce the pollutants of concern during storm flows using natural restoration techniques. The City of London owns the property and has agreed to place the site in a permanent easement upon approval of the BMP project. In regard to treatment efficiency, it is difficult to predict an exact amount of TSS and TP reduction from the BMP installation. Based on the current condition of Town Branch at the proposed BMP location, stabilization of the stream would provide an immediate and pronounced reduction in sediment to the stream along with on-site stormwater treatment through the hydrodynamic separator. Pre- and post-construction


storm-flow monitoring will determine the effective reduction of sediment and nutrients by the streamside wetland. The stream will be monitored for sustained stability and function as a part of the larger Implementation Plan for the requisite time. Restored sections of streams will be reevaluated one to two years post-construction to quantify stability, vegetation survival, aquatic habitat improvement, and biological integrity. Success will be indicated by stability, high vegetation survival, and increased aquatic habitat and biologic integrity compared to pre-restoration conditions. Similarly, any enhancement through riparian buffer planting will require a vegetation survey to be completed after the buffer has been planted and again in one to five years to determine percent survival. Third Rock Consultants, LLC (Third Rock) will secure all required federal and state permits and will adequately address comments made by the state permitting agencies. A Third Rock representative will be on site during construction. At a minimum, this BMP will comply with the Kentucky Agriculture Water Quality Act and/or the Forest Conservation Act. Financial Plan of Action Estimated costs associated with the stream and wetland restorations are lumped into one project amount due to the connection of the site. The total estimated project cost is $99,760. Greater than 25 percent of the cost includes in-kind donation of labor for completing the project. It should be noted that this amount includes construction costs that will not be funded by the 319(h) Grant, though funding for construction costs has not been secured at this time. A variety of potential funding sources exist, including Kentucky Department of Fish and Wildlife Resources in-lieu fee funds and potential in-kind labor and equipment donations from the City of London. It is anticipated that plants and planting costs will be offset through donations and volunteers, possibly with assistance from PRIDE. The property will be secured and the restoration protected through a management agreement with the City of London. Maintenance Agreement with Landowner The stream enhancement will require minimal maintenance once the project has been completed. The project will be protected by a conservation easement which imposes strict limitations on how the site can be used, further ensuring the long-term sustainability and function of the stream and wetlands within the project site. The BMPs should function with little maintenance in perpetuity. Operation and maintenance for the stream enhancement should include annual inspection of the in-stream structures to ensure their stability and inspection to ensure that no significant debris jams are forming that would create excessive streambank erosion. Maintenance of the hydrodynamic separator shall be performed on an annual basis as a minimum requirement or as often as needed to maintain its function. The stream will be monitored more thoroughly in the third year following construction for sustained stability and function per permit requirements by qualified city personnel or a consultant representative paid by the City of London. The stream corridor will be reevaluated at that time to assess stability, vegetation survival, aquatic habitat presence, and biological integrity. Stability will be assessed using visual inspection to


observe structure stability and look for bank erosion and erosion within the floodplain/wetlands. Photo stations will be established after construction, and photos will be taken along the entire length of stream and within the wetland areas. These photos will provide a baseline view of the stream for comparing with conditions in subsequent years during the City of London’s general operating and maintenance inspections. The project site will be monitored at the end of three years for vegetation success and the presence of invasive species. The survival rate of the planted species will be determined using transects across the site of sufficient size and frequency to determine live stems per acre, species composition, and dominant herbaceous vegetation. Success will be indicated by stability, high vegetation survival, and improved aquatic habitat and biological integrity compared to pre-restoration conditions. Invasive species will be treated with herbicides if needed. Kentucky Division of Water (KDOW) Notification Third Rock will notify KDOW by email prior to BMP implementation. Specific design of the project will be developed and submitted to KDOW prior to implementation. If any changes to the proposed implementation are required, KDOW will be notified and a revised BMPIP will be submitted. All BMPs will comply with the Kentucky Agriculture Water Quality Act and/or the Forest Conservation Act.

September 27, 2012 Page 1 of 5

BMP Implementation Plan Whitley Branch Stream and Wetland Restoration

London, Laurel County, KY Third Rock Consultants, LLC September 27, 2012 (Revised)

Technologies to be Installed The proposed Best Management Practices (BMP) project described in this BMP Implementation Plan (BMP IP) is the enhancement of approximately 1,215 feet of Whitley Branch and wetland re-establishment and rehabilitation within the adjacent floodplain. The proposed project site is located on Whitley Branch just upstream from the confluence with the Little Laurel River and continues upstream to just below the crossing of Whitley Branch by the CSX railroad. Stream enhancement of Whitley Branch will provide bank stabilization, reduce bank erosion, improve aquatic habitat, increase floodwater retention within the site, and promote nutrient cycling/pollution treatment. Wetland re-establishment and rehabilitation will increase floodwater retention within the site, promote nutrient cycling/pollution treatment, and improve wildlife habitat. The City of London owns the entire stream enhancement reach and the adjacent 75.5 acre bottomland area on both sides of the stream. The property was purchased through a grant from the Kentucky Heritage Land Conservation Fund and is protected by a permanent easement. Two BMPs are proposed for this site: 1. Stream Enhancement (NRCS codes 322- Channel Bank Vegetation and 580- Streambank and Shoreline Protection) on approximately 1,215 feet of a highly incised and straightened perennial 2nd order stream. The stream enhancement will involve the following:

• Excavate bankfull floodplain on both sides of the stream to reduce in-channel shear stress, increase floodwater storage, improve sediment storage, and promote nutrient cycling/treatment.

• Stabilize banks • Develop riparian zone habitat by planting native vegetation (hardwood and herbaceous)

appropriate for each hydrologic zone • Install log vanes to provide long term grade control and provide aquatic habitat • Install a rock cross-vane to provide long term grade control and provide aquatic habitat • Install wood/sod mat to provide bank stability and enhance aquatic habitat

2. Wetland Enhancement (NRCS code 657- Wetland Restoration) of 20 to 25 acres of the adjacent floodplain. Specific tasks include:

• Regrading of artificial drainage features (ditches) • Excavation and grading to promote hydrologic reconnection with Whitley Branch, create

floodwater storage, and create a diversity of wetland habitat • Plant native hardwood and herbaceous species appropriate for each hydrologic zone • Install public access (parking lot, boardwalks, trails) and educational signs


• Public information and educational signs will be submitted to the Kentucky Division of Water (KDOW) for review

• All access structures installed should utilize low impact technologies The stream enhancement project will utilize natural stream channel design to enhance approximately 1,215 feet of stream that has been impacted by past and present land use practices. This section of Whitley Branch has been straightened, which has resulted in an incised channel that is no longer connected to the adjacent floodplain. The existing banks will be excavated to form a bankfull floodplain. Grade control, bank stability, and in-stream aquatic habitat will be provided by placement of three log vane structures, one rock cross-vane structure, and toe wood/sod mat structures. Establishment of a riparian zone with native herbaceous and hardwood plants will provide bank stabilization, improved water quality, and enhance wildlife habitat. The riparian zone will be protected from future disturbance. The surrounding floodplain within the proposed project area is an existing wetland, or was wetland prior to installation of drainage ditches. The proposed enhancements will provide increased nutrient and sediment treatment within the site as well as increase wetland diversity and wildlife habitat. Both banks of Whitley Branch will be excavated to reconnect the stream to the adjacent wetland areas. Three wetland areas adjacent to the stream will be enhanced through grading, removal of artificial drainage features, construction of a very low, wide berm, and re-vegetation with native, site-specific species. Wetland 3 ultimately drains to a small finger tributary of the Little Laurel River. A small amount of channel lining will be placed downstream of the Wetland 3 berm to protect the berm if a headcut were to originate in the drainage feature that becomes the tributary. A single temporary stream crossing consisting of appropriately sized culverts will be utilized to cross Whitley Branch during construction. The crossing location has been identified in the field by Third Rock Consultants. It will be removed as soon as the stream bank and wetland work are completed or if the construction effort gets suspended for a significant amount of time. In this location, the stream bottom will be restored to the grade indicated in the design plans and banks to the slope indicated in the design plans following removal of the crossing. The entire site will be greatly enhanced by the addition of low impact site amenities to facilitate recreational and education opportunities within the project property. A small parking lot, trails, and boardwalks will be designed and constructed to give visitors access to the variety of unique stream and wetland habitats within the site. The parking area and trails will be permeable. A local source of clean, crushed, recycled concrete is available and will likely be used for the trails and parking surfaces. This is a desirable way to recycle the material and create a permeable surface. All staging and storing of construction equipment will be conducted in a way such that site disturbance and soil compaction is minimized. Erosion and sediment controls shall be implemented as specified within the design plans, including the following specific items. Straw wattles will be used to protect streams from sediment-laden runoff. Small diversion berms (coupled with rock check outlets) could be utilized to divert clean runoff around an area under construction. Upland areas have been designated for the placement of any clean fill generated by project excavation. Silt fence shall be installed around any soil stockpiles during construction such that sediment is controlled and does not enter the stream. Educational signage will be produced (and approved by KDOW) to provide information on the water quality and ecological benefits of the unique stream and wetland habitats present on the site.


BMP Selection Process and How BMP is Targeted to Specific Location Data gathered and presented in the approved Corbin Reservoir Watershed Plan indicated that runoff from the City of London is the most significant source of pollution to the Corbin reservoir. In particular, this segment of Whitley Branch was identified as the primary source of pollutants within the Little Laurel River watershed. Goals of the subsequent Implementation Plan are to reduce pollutants (nutrients and sediment) from the London urban area through a series of Best Management Practices (BMPs). BMPs sited in and around London will reduce the amount of sediment and nutrients entering the Little Laurel River and ultimately the Corbin City Reservoir. The type and location of this BMP is based on the data gathered in the Watershed Plan. Whitley Branch, just west of KY-229 and north of Levi Jackson State Park south of London, is the focus of this individual Implementation Plan as a result of elevated sediment loads, bacteria, and nutrients at this site as presented in the watershed plan. Sources of these pollutants include overland and bank erosion, sewage leaks, and excessive nutrients from the London wastewater treatment plant’s discharge. The proposed project site is located downstream of the City of London and the City of London’s wastewater treatment plant. Whitley Branch was listed on the 2005 303(d) list of impaired waters. It was impaired for swimming (Nonsupport) due to pathogens from collection systems failure. The enhancement of the stream and adjacent wetlands at this site would effectively reduce the pollutants of concern during storm flows by increasing the natural processes of floodwater storage, sediment storage, and nutrient cycling/treatment. The City of London owns the property. It was purchased through a grant from the Kentucky Heritage Land Conservation Fund and is protected by a permanent conservation easement. In regards to treatment efficiency, it is difficult to predict an exact amount of sediment and nutrient reduction from the BMP installation. Based on the current condition of Whitley Branch at the proposed BMP location, stabilization of the stream will provide an immediate and pronounced reduction in sediment to the stream. Installation of log vanes, a rock cross-vane, and toe wood/sod mat structures will provide aquatic habitat where little currently exists. The adjacent wetlands will be enhanced to provide water storage that can ameliorate downstream flooding and enhance pollutant removal. By reconnecting Whitley Branch to an enhanced floodplain and planting native vegetation along the riparian corridor and within the wetlands, the site will have an improved capability to store runoff and filter out sediment and other particulates. Third Rock Consultants, LLC (Third Rock) will assist the City of London in securing all required federal and state permits and will adequately address comments made by permitting agencies. A Third Rock representative will provide oversight during construction. At a minimum, this BMP will comply with the KY Agriculture Water Quality Act and/or the Forest Conservation Act. Financial Plan of Action The total estimated project cost for stream and wetland enhancement design, production of construction plans, preparation of permit applications and documentation, and facilitation of permit acquisition is $70,000, predominately funded by 319(h) grant funds. The value of the property, which was acquired


through Kentucky Heritage Land Conservation Fund, counted as matching funds (40% or greater). Design of the parking lot, trails, interpretive elements, and other technical services associated with design and implementation of the entire project is expected to cost $49,500, and will predominately funded through 319(h) grant funds. Construction of the project (stream and wetland enhancement and the interpretive elements) will be predominately funded through materials and in-kind services, including use of equipment and manpower, provided by the City of London. The probable cost to construct the project exceeds $100,000 (and thus will serve as 40% or greater matching funds). The City of London is also currently seeking partnerships, grants, and other sources of funding for components of the construction and long- term maintenance of this project. At least some of the hardwood tree species are expected to be provided by USFWS and planting may be performed by volunteers and the City of London. Maintenance Agreement with Landowner The enhanced stream and wetland will require minimal maintenance once the project has been completed. Since this property was purchased using a grant from the Kentucky Heritage Land Conservation Fund, it is protected by a permanent easement. The easement imposes strict limitations on how the property can be used, further ensuring the long-term sustainability and function of the stream and wetlands within the project site. All work completed will be in compliance with the Kentucky Heritage Land Conservation Fund agreement. The educational components (parking area, trails, boardwalks, signs) will be inspected annually by the City of London and will be maintained/repaired/updated by the City of London if indicated. Additionally, if inspections identify other problems within the site such as littering or vandalism, the problems will be addressed by the City of London. The stream floodplain and wetland areas should be self-sustaining, but the City of London or their consultant representative will visually inspect the site annually as indicated below and if instabilities occur they will be corrected by the City of London. The project will be evaluated every two years by the City of London or their consultant representative to determine the need for removal or control of undesirable plant species. The City of London will be responsible for performing the activities necessary to remove or control the undesirable plant species, such that the project site ultimately meets success criteria presented in permitting documents. The stream and wetland enhancement BMPs should function with little maintenance in perpetuity. Operation and maintenance for the stream enhancement should include annual inspection of the in-stream structures to ensure their stability and inspection to ensure no significant debris jams are forming that would create excessive streambank erosion. Likewise, the wetland areas should be visually inspected annually to ensure no excessive erosion is occurring. The annual inspection of the parking area, trails, and boardwalks shall determine if resurfacing is required. With appropriate maintenance, the parking lot and trails can last perpetually. The boardwalk is expected to last 20 to 30 years with maintenance. The annual inspection of the signage should ensure relevancy of the presented material and ensure signage is still visible/not deteriorated. It is expected that the signage can last 20 to 30 years with maintenance. The stream and wetlands will be monitored more thoroughly in the third year following construction for sustained stability and function per permit requirements by qualified city personnel or a consultant representative and paid for by the City of London. The stream corridor will be reevaluated at this time to assess stability, vegetation survival, aquatic habitat presence, and biological integrity. Stability will be assessed using visual inspection to observe structure stability and look for bank erosion and erosion within


the floodplain/wetlands. Photo stations will be established after construction and photos will be taken along the entire length of stream and within the wetland areas. These photos will provide a baseline view of the stream for comparing with conditions in subsequent years during the City of London’s general operating and maintenance inspections. The project site will be monitored at the end of three years for vegetation success and the presence of invasive species. The survival rate of the planted species will be determined using transects across the site of sufficient size and frequency to determine live stems per acre, species composition, and dominant herbaceous vegetation. Success will be indicated by stability, high vegetation survival, and increased aquatic habitat and biological integrity compared to pre-restoration conditions. Invasive species will be treated with herbicides if needed. KDOW Notification Third Rock will notify KDOW by email prior to BMP implementation. Specific design of the project will be developed and submitted to KDOW prior to implementation. If any changes to the proposed implementation are required, KDOW will be notified and a revised BMP IP will be submitted. All BMPs will adhere to KY Agriculture Water Quality Act and/or the Forest Conservation Act.

APPENDIX C

Appendix C – Town Branch Remediation

Waste transfer area within the Town Branch site. The hydrodynamic separator treats runoff from this area.

Stormwater treatment device (hydrodynamic separator) delivered to the Town Branch site.

Stormwater treatment device (hydrodynamic separator) installation at the Town Branch site.

Stormwater treatment device (hydrodynamic separator) installation at the Town Branch site.

Appendix C – Town Branch Remediation

Stormwater treatment device (hydrodynamic separator) after final installation and during grading/paving of runoff area

Functioning stormwater treatment device (hydrodynamic separator) after final installation and grading/paving of runoff area

APPENDIX D

Appendix D – Whitley Branch Wetland

Whitley Branch with eroding banks and mid-channel bar before restoration.

Kentucky Arbor Day volunteer event where more than 500 trees were

planted along Whitley Branch

City of London personnel installing a habitat log structure in Whitley

Branch under Third Rock supervision.

Viewing platform constructed for observation of a constructed niche

wetland habitat at the Whitley Branch Wetland site.

Third Rock oversees installation of brush and woody debris, a component of a habitat log structure, in Whitley Branch to increase in-stream habitat.

Low impact, natural surface trails provide access throughout the Whitley

Branch Wetland site for education and outreach activities.

Appendix D – Whitley Branch Wetland

Stable banks and floodplain access following construction of stream

enhancements (Whitley Branch). Vegetation growing in newly constructed wetland (Whitley Branch).

Successful emergent wetland restoration within the 75.5-acre

Whitley Branch Wetland site.

Educational kiosk constructed to display signage at the Whitley

Branch Wetland site.

Image and logo created to promote the Whitley Branch Wetland for educational/outreach opportunities.

APPENDIX E

final project report · 2019. 2. 5. · final project report watershed planning, implementation,...

Documents