a green infrastructure tour - the washington metropolitan area -
DESCRIPTION
A Green Infrastructure Tour - The Washington Metropolitan Area -. Developed under a grant from the National Park Service, National Capital Region through the Metropolitan Washington Green Infrastructure Demonstration Project. - PowerPoint PPT PresentationTRANSCRIPT
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A Green Infrastructure Tour
- The Washington Metropolitan Area -
Developed under a grant from the National Park Service, National Capital Region through
the Metropolitan Washington Green Infrastructure Demonstration Project
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Tour Introduction
• Purpose – To Provide Visitors and Residents of the Washington Metropolitan Area (WMA) (click to see map) with various examples of existing Best Management Practices (BMP’s) that are helping to sustain our local green infrastructure (e.g., agricultural and forested areas, stream valley parks, green roofs, low impact development techniques, stream valley restoration projects, etc.) and protect and restore our natural resources.
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Tour Introduction – cont.
• The Anacostia was selected as the featured watershed because the breadth of related and representative practices present. We have also included two recently completed projects outside this watershed in the District of Columbia and Arlington County, Virginia.
• In addition to provide greater regional context and representation, we invite other submissions for green infrastructure sites to broaden the scope of this dynamic virtual tour.
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Tour Logistics• This tour has been intentionally designed so that all
sites (click to see map) may be physically visited via automobile in one day. The sites in the Anacostia watershed are numbered in a logical line of travel via automobile. Alternatively, this presentation provides representative site information for those that may only have time for a virtual regional tour.
• There are also two other sites that lie outside the Anacostia watershed. These sites may be combined to modify the Anacostia Tour with those sites in the lower Anacostia Watershed in order to maintain a one-day tour.
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Tour Logistics – Cont.
• Many sites are only accessible via automobile due to their remote locations. However, a few sites are accessible via Metro-Rail. Site accessibility is noted with each destination.
• When planning to conduct a tour of the sites in this presentation, please be sure to contact the landowners prior to your visit.
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Anacostia Watershed Geographic Scope
• The 176 sq-mi. Anacostia River watershed, which encompasses portions of suburban Maryland and the District of Columbia (click to see map) is a green infrastructure microcosm of the larger 3,020 sq-mi Washington Metro Area.
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The Metropolitan Washington Green Infrastructure Demonstration Project
• The Green Infrastructure Demonstration Project is a partnership between the National Park Service and the Metropolitan Washington Council of Governments to move parks, open space and recreation areas to the forefront -- these areas are the green infrastructure of the Metropolitan Washington.
• Through the use of geographical information; technical forums and workshops; improved communication; and targeted technical assistance, this project has worked to build a lasting public constituency and create a model public and private partnership for parks and open space.
• The Project’s ultimate goal is to impart a metropolitan region
that continually strives to achieve a balance between the built environment and green space, sustained by natural processes and able to support and enhance the quality of life for its people and communities.
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What is Green Infrastructure?
• Green Infrastructure is “Green Infrastructure is a network of open space, airsheds, watersheds, woodlands, wildlife habitat, parks, and other natural areas, which provide many vital services that sustain life and enrich quality of life”.
President’s Council on Sustainable Development Report - 1999
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“I think there’s an opportunity to look at how we regenerate communities and ecologies by looking at green space as a form of infrastructure like roads, water lines, and sewers. When we talk about green infrastructure in the Washington [D.C.] area, we talk about everything from window boxes, to Rock Creek Park and in between: it’s urban gardens, residential landscaping, pocket parks, landscaped portions of a development parcel, linear parks, riparian buffers, street trees, parkways, farms and large parks and reserves.”
Green Infrastructure / Gray Infrastructure
J. Glenn Eugster, National Park Service - OMG Open Space Roundtable -Philadelphia, 2001
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Green Infrastructure Tour Sites:
• Visit The Anacostia Watershed (next slide)
• Visit The Arlington County Government Center
• Visit The National Park Service Center for Urban Ecology
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Address:2000 Half Street, SWWashington, DC 20024
Phone: 202-479-6710Fax: 202-479-9509 Email: info@ecc1
Ground Transportation RecommendedMetro Rail Stop: Navy Yard (8 block walk)
Tour Stop No. 1Earth Conservation Corps
Matthew Henson Earth Conservation Center
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Green Roofs
• Green roofs are an alternative to traditional asphalt-based roofs constructed of waterproofing, soil and plants. They are an innovative stormwater management solution especially in intensely developed urban areas where open land is scarce. Green roofs have been used extensively in Europe for many years to improve water and air quality, mitigate the urban heat island effect, and improve the energy performance of buildings.
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Site Features
• Green Roof
• Green Kiosk
• Rain Garden
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Green Roof
Looking north toward the Anacostia River and the Whitney Young Bridge
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Green Roof
Looking south toward the Matthew Henson second floor meeting room
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Green Roof
Multi-level green roof area
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Green Roof
Close up view of Sedum sp. and other plant materials
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Green Roofed Kiosk
View of Kiosk at ECC with miniature green roof
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Rain Garden
Recently constructed rain garden immediately following a 0.5 inch rain fall event
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Tour Stop No. 2 National Park Service
Kenilworth Park and Aquatic Gardens/Marsh
Address: Anacostia Ave. & Douglas St., N.E.Washington, D.C. 20019
Phone: 202-426-6905
Ground Transportation RecommendedMetro Rail Stop: Closest is Minnesota Ave (several blocks)
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Site Features
• Historic Aquatic Gardens (dating from the 1860’s)• 32-acre freshwater tidal river marsh restoration
project (constructed 1993)• River trail and boardwalk (constructed 2002)• Interpretative signage
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Trailhead
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Aquatic Gardens
Looking west from visitor’s center
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Lotus Blossoms
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Kenilworth Marsh Restoration 1993
At the time of its completion, this 32 acre tidal-fresh water restoration project was the largest of its kind in the U.S. It involved the raising of the marsh bed elevations through the addition of approximately 130,000 cubic yards of clean Anacostia River dredge spoil material and the planting of 300,000 native emergent aquatic plants
Project partners included: National Park Service, U.S. Army Corps of Engineers, the District of Columbia and COG
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Kenilworth Marsh – Before Restoration
Anacostia River in foreground
Kenilworth Marsh mud flats pre-restoration (circa 1989)
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Kenilworth Marsh – Before Restoration
Close up of extensive mud flat area where pre-restoration water depths were generally too deep to support emergent aquatic plants
Marsh at low tide
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Kenilworth Marsh - After Restoration
Tidal gut at low tide
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Kenilworth Marsh - After Restoration
Tidal gut at high tide
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Boardwalk Over Marsh
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Interpretative Signage
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Tour Stop No. 3City of Greenbelt /
Buddy Attick Lake Park
Address:555 Crescent RoadGreenbelt, Md. 20770
Phone: City of Greenbelt: 301-474-8000
Buddy Attick Lake Park: 301- 397-2200
Ground Transportation Recommended
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Site Features
• Historic Green Town with planned wooded open space areas and trail systems
• Greenbelt Museum (fully restored and furnished 1930’s house)
• 23-acre Greenbelt Lake and recreation area
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Background/History of City of Greenbelt
• Greenbelt is one of three "green towns" built during President Franklin D. Roosevelt's Administration (The other two being Greenhills, OH and Greendale, WI). The primary purpose of these projects was to provide employment during the Great Depression, the green towns were innovative planned communities, designed to provide economical housing in a pleasant, healthy surrounding.
• In 1935, the U.S. Government assembled parcels of overworked farmland to become the site of a new community to be called Greenbelt. Groundbreaking was in October 1935 and the first residents arrived two years later. The government created a community of mixed housing types, a school, town center with shops and theater, underpasses, walkways, parks, playgrounds, swimming pool, and a 23 acre lake.
• For additional information see: http://www.ci.greenbelt.md.us/About_Greenbelt/history.htm
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Historic Frame Homes
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Planned Green Space
Typical community open space area
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Buddy Attick Lake Park
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23-Acre Greenbelt Lake Recreation Area
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Tour Stop No. 4U.S. Department of Agriculture
Beltsville Agricultural Research Center (BARC)
Address:National Visitor CenterBuilding 302 (Log Lodge)Powder Mill RoadBeltsville, Maryland 20705
Phone: 301-504-9403
Scheduled Tours Available (301-504-8483) Ground Transportation Recommended
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Site Features
• Largest remaining green space in the Anacostia Watershed (7,200 acres)
• Working research farm
• National Visitor Center
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Background
• The 7,200-acre Beltsville Agricultural Research Center is the largest and most prominent of USDA’s Agricultural Research Services 100-plus sites. It is a dynamic, highly diversified research facility featuring large expanses of forest and farm fields. The facility’s origins date back to livestock experiments in 1910. At its maximum size during the 1940’s, the facility encompassed over 14,000 acres of land.
• A trip to the ARS Visitor Center will provide guests a broad picture of agricultural research in America, as well as a glimpse back at the Washington Metro Area’s agricultural roots.
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Aerial Photo of BARC, 2000
Visitor Center (Log Lodge)
BARC property is outlined in red
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BARC Welcome Sign
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USDA National Visitor’s Center
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National Visitor’s Center1930’s Civilian Conservation Corps (CCC)
Log Cabin Building
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Grain Fields
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Historic Farm Buildings
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Tour Stop No. 5 M-NCPPC Fairland Regional Park- Fairland
Sports and Aquatics Complex
Address:13950 Old Gunpowder RdLaurel, Maryland 20707
Phone: 301-504-9595
www.pgparks.com/places/parks/fairland.html
Ground Transportation Recommended
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Site Features
• Stormwater management demonstration area featuring parking lot sand filter, artificial wetlands, infiltration trench, grass swale and check dam system, and stormwater management wet pond
• Stormwater management pavilion and self-guided walking tour with interpretive signage
• Multi-recreational facilities including aquatic swim center, open and covered tennis courts, baseball and soccer fields and a hiker-biker trail system
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Background
• 150 acre regional park (Prince George’s County, Maryland portion)
• Stormwater management pavilion and best management practices (BMP’s) demonstration area. Constructed in 1994 in partnership with Maryland Department of the Environment as a BMP demonstration site for both the public and building industry
• BMP demonstration area features parking lot sand filter, artificial wetlands, infiltration trench, grass swale and check dam system, and stormwater management wet pond
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Fairland Sports and Aquatics Complex Facilities Map
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Aquatics Center
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Parking Lot Sand Filter
Provides water quality control for the first 0.5 inches of runoff.
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Infiltration Trench and Interpretive Signage
Gravel-lined infiltration trench in background.
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Chesapeake Bay Information Signageand Artificial Wetland
Stormwater management wetland in background.
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Grass Swale with Check Dams
Provides first-flush water quality control.
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Tour Stop No. 6 M-NCPPC Paint Branch Stream
Valley Park/Hobbs Drive
Site Address: 10011 Hobbs Drive Silver Spring, Maryland 20904
Contact Address:Maryland- National Capital Park and Planning Commission Department of Park and Planning8787 Georgia AvenueSilver Spring, Maryland 20910
Phone: (301) 495-2500E-mail: [email protected]
Ground Transportation Recommended
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Site Features:
• Wooded stream valley park area and trout stream in designated Montgomery County Special Protection Area (SPA).
• Large lot (1-2 acres) of single family residential development
• Open section road drainage
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Background• The Maryland-National Capital Park and Planning Commission is a
bi-county agency empowered by the State of Maryland in 1927 to acquire, develop, maintain and administer a regional system of parks within Montgomery and Prince George's Counties, and to prepare and administer a general plan for the physical development of the two counties. In addition, the Commission gained responsibility for the public recreation program in Prince George's County in 1970.
• The Upper Paint Branch stream valley park system includes large conservation park designation areas intended for natural resource protection and non-developed recreational uses such as hiking, bird watching and fishing. The Paint Branch is unique in that it supports one of the WMA’s last self-sustaining trout fisheries.
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Background – Cont.
• Since 1996, M-NCPPC and the state of Maryland have acquired over 400 acres in the Upper Paint Branch at a cost of over $20 million dollars to protect the trout resource.
• In 1997, Montgomery County created an SPA program to: establish coordinated procedures, performance goals, criteria and requirements for development that will mitigate adverse development-related impacts on water resources. To date, three areas in the County have been designated as SPA’s (Upper Paint Branch, Clarksburg and Piney Branch).
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Hobbs Drive/Park Entrance
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Park Entrance Signage
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Hobbs Drive - Open Road Section
The grass swale drainage system promotes infiltration and filtration of road runoff and increases flow-path and time of concentration.
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Address: 1700 Block of Dennis Avenue
Silver Spring, Maryland 20902
Contact Address:
Montgomery County GovernmentDepartment of Environmental Protection255 Rockville Pike, Suite 120Rockville, Maryland 20850
Phone: 240-777-7700
Ground Transportation Recommended
Metro Rail Stop: Forest Glen or Wheaton
Tour Stop No. 7 Wheaton Branch/Dennis Avenue Stormwater
Management Facility
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Background
• Keystone stormwater management retrofit facility constructed by Montgomery County Department of the Environment which is instrumental in the restoration of the highly urbanized Sligo Creek sub-watershed
• The 11 square mile Sligo Creek subwatershed is typical of the many older drainage basins in the WMA which were developed prior to the advent of stormwater management control requirements
• Land uses in the Sligo Creek subwatershed are predominantly residential with a commercial corridor located along MD Route 97 (Georgia Ave.). Most of the development in this subwatershed occurred between the 1930’s and the 1950’s
• The success of this stormwater retrofit facility has enabled the restoration of downstream degraded aquatic habitat in both the Wheaton Branch tributary and Sligo Creek mainstem
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Site Features
• 3-celled extended detention stormwater management wet pond/marsh system constructed in 1989-90
• Provides water quantity and quality control for a 55% impervious, 805 acre drainage area draining the Wheaton Branch headwaters
• 6-acre wet pool surface area with both aquatic and terrestrial plantings
• Cell No. 1 (closest to road) dredged in 1997. Note: over 3,000 yd3 of sediment removed
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Site Map
SWM Pond
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Winter scene looking south toward concrete control structure
Cell No. 2 - Winter
Control structure
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Cell No. 2 - Summer
Summertime scene with creeping primrose willow (aquatic plant) in foreground
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Site No. 8 M-NCPPC Sligo Creek Park
/Forest Glen Road
Address: 1400 Block of Forest Glen RoadSilver Spring, Maryland 20910
Contact Address:Maryland-National Capital Park and Planning Commission Department of Park and Planning8787 Georgia AvenueSilver Spring, MD 20910
Phone: (301) 495-2500E-mail: [email protected] Transportation Recommended
Metro Stop: Closest is Forest Glen
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Site Features:
• Representative stream restoration and stormwater management control area for the larger multi-agency Sligo Creek restoration effort
• Two off-line artificial marshes• Stream habitat enhancement – (boulder placement
and stone wing deflector)• Understory reforestation• Riparian buffers• Hiker – Biker trail system• Bio-filtration swale system (~200 feet long with pre-
treatment sediment basin)
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Background
• This portion of the Sligo Creek Stream Valley Park System is the site of stream restoration work completed between 1994-2002
• It also includes various stormwater management BMP’s including artificial marshes and a bio-filtration swale system
• The Forest Glen Road marsh was constructed in 1994 and serves as both a stormwater management facility and wildlife habitat feature
• The Godwin Drive marsh was constructed in 1999 and provides stormwater management control for a 30 - acre residential neighborhood area
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Site Map
Wetland, bio-filtration, stream restoration area
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Godwin Drive Marsh
Off-line marsh treating 30-acres of residential stormwater runoff
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Storm Flow Splitting Weir
Godwin Drive weir design diverts first inch of runoff into marsh
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Stone Wing Deflector and Boulder Placement
Stone Wing Deflector
Boulder Placement
Looking upstream from Sligo Creek footbridge
The techniques in this photograph were designed to enhance aquatic habitat for this degraded urban stream.
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Sligo Creek Hiker-Biker Trail Signage
This ten mile-long Hiker-Biker trail connects Wheaton Regional Park with the lower Northwest Branch Stream Valley Park
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Bio-filtration Swale
Pre-treatment sediment basin
Bio-filtration swale
8-foot wide, 200-foot long bio-filtration swale (looking north toward Forest Glen Road)
This BMP provides water quality control
for an approximately
0.5 mile portion of
Interstate 495
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Bio-filtration Swale
View of pre-treatment sediment basin and I-495 over pass
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Forest Glen Road/Sligo Creek Parkway Intersection Concrete Flume Storm Drain
Stormwater runoff from storm drain system treated in Forest Glen Road marsh
Concrete flume
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Forest Glen Road Marsh
Off-line marsh treating 14-acres of residential stormwater runoff
Buttonbush plantings
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Tour Stop No. 9M-NCPPC Sligo Creek Park/
Park Valley Road
Address: 800 Block of Park Valley Road
Silver Spring, Maryland 20910
Contact Address:
Maryland- National Capital Park and Planning Commission
Department of Park and Planning
8787 Georgia AvenueSilver Spring, Maryland 20910
Phone: (301) 495-2500
E-mail: [email protected]
Ground Transportation Recommended
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Site Features:
• Stream Habitat Enhancement (rootwads, j-hook, log spurs, boulder placement and rock spur). These are commonly employed techniques for both enhancing stream channel stability and fish habitat
• Understory Riparian Reforestation Plantings (both upstream and downstream of Park Valley Road)
• Narrow, Urban Stream Riparian Buffer
• Hiker – Biker Trail System
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Background• As part of the larger Sligo Creek restoration effort, this site features
various 1999 vintage stream restoration project site areas, as well as riparian understory plantings
• This park area was acquired via Capper-Cramton Act funds which were used regionally to purchase open space areas (In 1930 this Act authorized funding for the acquisition of lands in the District of Columbia, Maryland, and Virginia for the park and parkway system of the national capital. Property acquisition included lands for George Washington Memorial Parkway; stream valley parks in Maryland and Virginia; and the park, parkway, and playground system of the District of Columbia)
• The Sligo Creek Stream Valley Park area featured herein, is one of the oldest park areas in the WMA and dates from the mid-1930’s
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Site Map
Riparian reforestation and stream restoration area
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J-Hook and Rootwad - Fish Habitat Enhancement Techniques
J-Hook
Rootwad
View of J-Hook and Rootwad installed in 1999 to improve pool habitat
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J-Hook and Rootwad
Looking downstream at J-Hook (right side) and Rootwad
Flow
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Understory Plantings
Planting area
View of 1999 riparian reforestation planting area featuring 17 native tree and shrub species
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Log Spur
Log Spur employed both for deflecting storm flows away from bank areas and for fish habitat enhancement
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Tour Stop No. 10Mount Rainier
Address: Bunker Hill Fire Station 3716 Rhode Island AvenueMount Rainier, Maryland, 20712
Contact Address:Prince George’s County Department of
Environmental Resources 9400 Peppercorn Place
Largo, Maryland 20774Phone: 301-883-5834
E-mail: [email protected]
Ground Transportation Recommended
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Site Features:
• A municipal application of a Bio-retention stormwater management system
• Incorporates use of Low Impact Development (LID) techniques in construction.
• Reduces stormwater runoff to the Bay
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Background - LID• Low Impact Development (LID) is an innovative stormwater
management approach with a basic principle that is modeled after nature: manage rainfall at the source using uniformly distributed decentralized micro-scale controls. LID's goal is to mimic a site's predevelopment hydrology by using design techniques that infiltrate, filter, store, evaporate, and detain runoff close to its source.
• LID addresses stormwater management through small, cost-effective landscape features located at the lot level. These landscape features, known as Integrated Management Practices (IMPs), are the building blocks of LID. Almost all components of the urban environment have the potential to serve as an IMP. This includes not only open space, but also rooftops, streetscapes, parking lots, sidewalks, and medians. LID is a versatile approach that can be applied equally well to new development, urban retrofits, and redevelopment / revitalization projects.
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Background – LID ContinuedBioretention
• Bioretention is a best management practice (BMP) developed in the early 1990's by the Prince George's County, MD, Department of Environmental Resources (PGDER). Bioretention utilizes soils and both woody and herbaceous plants to remove pollutants from storm water runoff. Stormwater runoff is conveyed as sheet flow to the treatment area, which consists of a grass buffer strip, sand bed, ponding area, organic layer or mulch layer, topsoil, and plants
• In bioretention systems, runoff passes over a grassed pre-treatment strip, which slows the runoff's velocity, distributes it evenly along the length of the ponding area (which consists of a surface mulch layer with plantings and the underlying topsoil). The ponding area is graded, its center depressed and water is ponded to a depth of 6 inches. Runoff gradually infiltrates into the underlying bioretention area and is evapo-transpired
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Bunker Hill Fire Station
Recently constructed fire station with bioretention system
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Bioretention System
Recently constructed bioretention system at Bunker Hill fire station
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Bioretention
Example of parking lot bioretention system treating stormwater runoff
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Tour Stop No. 11Bertie Backus Middle School
District of Columbia Public SchoolsBio-retention Area
Site Address: 5707 South Dakota Ave, N.E.Washington, DC 20011
Phone: 202 596-6110Principle: Alfonzo Powell
Site Contact: Ms. Gloria Thompson 7th Grade Science Teacher
Project Installation Contact: Jim Shell – Metro-Wash. COGPhone: 202 962-3342E-mail: [email protected]
Metro Rail Stop: Fort Totten
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Site Features:
• Bio-retention cell retrofits in a large paved playground / parking area
• Three 64 square foot cells planted with native vegetation
• Metro accessible from the Fort Totten Metro (Red or Green Line)
• Accessible without a prior appointment or guide
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Background• The project described herein involved two DC Public
Schools in the Anacostia watershed and featured the installation of bioretention cells, the planting of trees and shrubs, mulching of eroded areas, and cleaning of clogged storm drain inlets and installation of porous pavement in parking areas.
• The Pollution Prevention Program in the public schools has been an ongoing environmental education effort for both DC-DOH/EHA and COG. COG staff has worked within the WMA students to teach product substitution to reduce chemical usage, recycling and product reuse to reduce waste in concert with the national recycling motto, of “Reduce, Reuse and Recycle”.
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Background – Cont.
• Through various programs, COG and DC-DOH/EHA have installed water-saving devices on faucets and toilets, instituted recycling programs, influenced a reduction in chemical use, addressed erosion problems, planted trees and cleaned out storm drains.
• This work was grant funded from the DC Department of
Health Environmental Health Administration (DC-DOH/EHA) and the U.S. Environmental Protection Agency (EPA) and the Metropolitan Washington Council of Governments.
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Bio-Retention Cell Installation
Cutting through asphalt adjacent to the storm drains.
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Bio-Retention Cell Installation
Excavating holes through asphalt
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Bio-Retention Cell Installation
Breaking through storm drain inlet and checking fit of drain pipe coupling
Installing gravel and perforated underdrain pipe
Backfilling with a compost, topsoil and sand mix
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Project at Completion
Project Completed in June 2004
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Tour Stop No. 12Casey Trees Endowment – Green Roof
Downtown Washington, DC
Address: Casey Trees Endowment 1425 K Street, NW Washington, DC 20005
Phone: 202-833-4010E-mail: friends @caseytrees.org
Metro Rail Stop: Farragut North
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Site Features:
• A partnership between the business and nonprofit sectors
• Tallest green roof in DC (12 stories high)• 3500 square feet in size • Planted in Spring of 2005• Monitoring equipment installed to measure
temperature modification, moisture retention and effluent quality and quality to the stormwater system
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Background
• This project is collaboration between DC Greenworks, Casey Trees and Blake Real Estate through a grant with the Chesapeake Bay Program’s Small Watershed Grants program through the National Fish and Wildlife Foundation and the Watershed Protection Division of the DC Department of Health.
• Installation was completed with the help of at-risk youth of Covenant House as well as Casey Trees volunteers
• Local roofing contractors and other businesses contributed their time at a reduced rate
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Roof Planting Stock
Flats of Sedum and other plant plugs are ready for transplanting.
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Completed Installation
Plants are installed with a jute mat for soil stabilization until plants are established.
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Casey Trees Green RoofFall of 2005
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Sites Outside the Anacostia
• Arlington County Governmental Center
• National Park Service – Center for Urban Ecology
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Tour Stop No. 13Arlington County Governmental Center
Green Roof
Site Address: 2100 Clarendon Boulevard Suite 801 Arlington, VA 22201
Project Contact: Joan Kelsch
Phone: 703 228-3599
E-mail: [email protected]
Metro Stop: Courthouse – Orange Line
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Site Features:
• Limited temperature monitoring
• 3,285 square feet in size
• Metro accessible from the Courthouse Metro Orange Line
• Accessible without a prior appointment or guide
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Background
• Arlington County local government officials are encouraging developers to make projects more environmentally friendly, by practicing what they preach through the installation of a 3,285 square foot green roof that is viewable from the county’s third floor conference room at Courthouse Plaza. The new roof garden improves looks, energy-efficiency, and reduces stormwater runoff.
• The Barrett Green Roof Roofscapes system was installed on the building in September 2003. The project team consisted of the building owner, Charles E. Smith Company; the architect, Page Southerland Page; and Arlington County’s Department of Environmental Services and Office of Support Services. Barrett Roofs, Commercial Roofing, and Chapel Valley Landscaping were instrumental in completing the roof. Total installation costs for the green roof that has a life expectancy of approximately 40 years, was under $65,000.
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Arlington County Governmental Center – Green Roof
Post-Installation in late summer of
2003
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Arlington County Governmental Center – Green Roof
One Year’s Growth -
Summer 2004
Go Back – Click Here
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Tour Stop No. 14National Park Service
Green Roof at the Center for Urban Ecology(CUE)
Site Address: Center for Urban Ecology4598 MacArthur Blvd. NWWashington, DC 20007-4227
Project Contact: Jim Sherald and Doug CurtisPhone: (202) 342-1443
E-mail: [email protected][email protected]
Ground Transportation Recommended
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Site Features: CUE
• Limited temperature monitoring
• 7,000 square feet in size
• 90 % roof area planted
• An example of an ‘extensive’ green roof
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Background CUE
• The Center for Urban Ecology (CUE), in Washington, DC, staffs the Natural Resources and Science Division for the National Park Service, National Capital Region. It is appropriate that this unit of the National Park Service be the first to install a green roof because of their vested interest in utilizing sustainable technology that reduces and/or mitigates the adverse impacts created by impervious surfaces in an ultra urban area.
• Architect?• Contractor?• Cost?• Installation Date?• Temperature Monitoring• SWM Runoff calculations from the average storm event
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Background CUE
• The roof construction under the green roof at CUE consists of a wood deck overlying steel web joists. A tapered rigid insulation board provides positive drainage to the gutters over an 80 mil. PVC roofing membrane.
• The soil media and plants are placed in sections that contain 2 foot by 2 foot plastic flats that are filled with 3 inches of planting media. The flats are placed right on top of the roofing membrane.
• A durable lightweight planting medium is used to prevent compaction and maintain the necessary pore space for water and oxygen retention. The planting medium consists of 75 to 85 percent inert expanded slate, with 15 to 25 percent organic material.
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Green Roof at the Center for Urban Ecology
Green Roof Under
Construction
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Green Roof at the Center for Urban Ecology
The Completed Green Roof
Go Back – Click Here
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Washington Metropolitan Green Infrastructure Tour
Contacts:Glenn EugsterAssistant Regional Director, Partnerships OfficeNational Park Service,National Capital Region1100 Ohio Drive, SW,Room 350, Washington, D.C. 20242202 [email protected]
Brian M. LeCouteur Senior Environmental Planner / Urban Forester Metropolitan Washington Council of Governments
777 North Capitol St. N.E. Suite 300 Washington, DC 20002 202 962-3393 [email protected]
John GalliAnacostia Program ManagerDepartment of Environmental ProgramsMetropolitan Washington Council of Governments 777 North Capitol St. NE. Suite 300, Washington, D.C. 20002202 [email protected]