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Potomac Meadow Water Quality Improvement July 2016
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Transcript of Potomac Meadow Water Quality Improvement July 2016
A Fairfax County, VA, publication
Department of Public Works and Environmental Services
Working for You!
Potomac Meadow Water Quality Improvements ProjectContract No. CN14125117Project No. SD-000031-117Task Order No. 32Dranesville District
May 17, 2016
Potomac Meadow Water Quality Improvements Project
Potomac Meadow Water Quality Improvements Project
Capital Facilities/Utilities Design and Construction Division/Transportation & Stormwater Construction Branch
Project DetailsPotomac Meadow Water Quality Improvements Project
Capital Facilities/Utilities Design and Construction Division/Transportation & Stormwater Construction Branch
Description:
The Potomac Meadow Water Quality Improvement Project was substantially completed on March 18, 2016, on time and within budget. The existing pond (ID# 0303DP) is located within the Pond Branch Watershed and is surrounded by River Bend Road on the east, Lagovista Court on the south, single family homes from west and wooded areas on the north. The work included retrofit of the existing drainage channel, replacement of driveway culverts, installation of a constructed stormwater wetland, installation of a bioswale and replacement of the existing top structure with a modified T-DI-7 top. The site was graded for positive drainage and restored with selective seed mix.
Project Overview:
The upper section of the project:
• Removal of the existing trickle ditch and construction of a 95’LX8’W BIOSWALE-2 • Treatment of the existing pond bottom area with compost amendment• Installation of a flow diverter weir at the concrete channel along Monalaine Court to divert the flow into the bioswale • Restoration of the disturbed area with seed mix and treesThe lower section of the project:• Replacement of the two existing 14”X23” RECP culverts with four 14”X23”RECP• Restoration of the disturbed driveway of property at 414 River Bend Road• Construction of a 105’ L X 8’ W BIOSWALE• Construction of two stormwater wetlands and two imbricated stone weirs• Replacement of the top of the existing structure with a new modified DI-7 top• Restored the disturbed area with seed mix and trees
Project Team:• Stormwater Planning Division – Vivian Bui• Utilities Design and Construction Division (UDCD) - Yousef Rayyan• Project Inspector, UDCD - Keith Ferrell• Survey Analyst, UDCD - Gregory Harper
Potomac Meadow Water Quality Improvements Project
Capital Facilities/Utilities Design and Construction Division/Transportation & Stormwater Construction Branch
Tax Map No. 8-4
Upper Section of the project site
Lower Section of the project site
Property at 414 River Bend Rd.
Trickle ditch
Driveway Culverts
Potomac Meadow Water Quality Improvements ProjectPRE-EXISTING CONDITION/LOWER SECTION
Capital Facilities/Utilities Design and Construction Division/Transportation & Stormwater Construction Branch
Structure # 8 Lid had to be replaced
10’ of the existing concrete ditch had to be replaced
Potomac Meadow Water Quality Improvements Project
POST CONSTRUCTION/LOWER SECTION
Capital Facilities/Utilities Design and Construction Division/Transportation & Stormwater Construction Branch
Modified DI-7 Top
2-Type A1 Grates
10’ New Concrete V-ditch
Potomac Meadow Water Quality Improvements Project
PRE-EXISTING CONDITION/LOWER SECTION
Capital Facilities/Utilities Design and Construction Division/Transportation & Stormwater Construction Branch
2-14”x23” RCP Culvert
Potomac Meadow Water Quality Improvements Project
POST CONSTRUCTION/LOWER SECTION
Capital Facilities/Utilities Design and Construction Division/Transportation & Stormwater Construction Branch
105’L X 8’W Bio-Swale -1 with EC-3 Matting
New 14”x23” Culverts
Potomac Meadow Water Quality Improvements ProjectDURING CONSTRUCTION
Capital Facilities/Utilities Design and Construction Division/Transportation & Stormwater Construction Branch
Potomac Meadow Water Quality Improvements Project
PRE-EXISTING CONDITION/UPPER SECTION
Capital Facilities/Utilities Design and Construction Division/Transportation & Stormwater Construction Branch
Existing Trickle Ditch
Potomac Meadow Water Quality Improvements Project
Capital Facilities/Utilities Design and Construction Division/Transportation & Stormwater Construction Branch
POST CONSTRUCTION/UPPER SECTION
Coir Logs- Check DamNew 95’L x 8’W Wide Bio-Swale Channel
EEC-3 Matting
Potomac Meadow Water Quality Improvements Project
DRIVEWAY RESTORATION
Capital Facilities/Utilities Design and Construction Division/Transportation & Stormwater Construction Branch
Before After
Potomac Meadow Water Quality Improvements Project
Capital Facilities/Utilities Design and Construction Division/Transportation & Stormwater Construction Branch
Additional Information
For additional Information, please call
www.fairfaxcounty.gov/dpwes
Irene Haske, Public Information Officer703-324-5500, TTY [email protected]
Capital Facilities/Utilities Design and Construction Division/Transportation & Stormwater Construction Branch