Nottoway Park Stormwater and Water Quality Improvements Phases 1, 2, & 3

A Fairfax County, VA, publication
Department of Public Works and Environmental Services
Working for You!
Nottoway Park
Stormwater & Water Quality Improvements, Phases 1, 2, & 3
June 20, 2016

Nottoway Park BMP Retrofits Project
DPWES Stormwater Planning Division
Meeting Outline
2
• Fairfax County Stormwater Management Program Drivers
• Accotink Creek Watershed Management Plan and Project
Examples
• Nottoway Park BMP Retrofits – Project Scope
• Design Approach
• Next Steps
• Q&A

Program Drivers and Project Types
3
• Chesapeake Bay Total Maximum Daily Load (TMDL)
• Other (local streams) TMDLs
• MS4 permit
• Major project types
 Stream and outfall restorations
 Stormwater Pond retrofits
 Site retrofits using Green Infrastructure
• List of projects is developed from watershed plans, and
referral from a variety of sources including the
maintenance division and citizen complaints

Countywide Watershed Planning
4
“Healthy Watersheds, Healthy
Communities”
• 30 Designated
Watersheds
• All 15 watershed plans
have been adopted by
Fairfax County

Accotink Creek Watershed Management Plan
5
Nottoway Park: AC9555
http://www.fairfaxcounty.gov/dpwes/watersheds/accotinkcreek.htm

Wakefield Run Stream Restoration
6

Brookfield Pond Repair and Retrofit
7

Brookfield Pond Repair and Retrofit
8

Mantua Elementary School Stormwater Retrofit (proposed)
9

Crook Branch Stream Restoration Project (proposed)
10
Reach 2

Nottoway Park Stormwater & Water Quality Improvements
Stormwater Planning Division
Stantec
11
Specializing in Water Resources Engineering & Stream Restoration
Williamsburg Environmental Group (WEG) joined Stantec in 2014
Stantec at a glance:
• Founded in 1954
• Over 15,000 employees in more than 200 locations
• Diverse range of services and sectors, practice areas include:
• Architecture, Buildings Engineering, Community Development, Environmental Services, Geotechnical
Engineering, Mining Engineering, Oil & Gas Engineering, Power Engineering, Project Management,
Transportation Infrastructure Engineering, Water and Wastewater Engineering
• Stormwater BMP Retrofit, Stream Restoration and Water Quality Improvements:
• James City County Green Infrastructure Plan, Stafford County stormwater BMP design, Town of Ashland
stream restoration, Fairfax County stream restoration and stormwater BMP design, VDMA stormwater BMP
inspections and design, Ft. Belvoir stormwater BMP inspections and Corrective Action Plans; VDOT stream
restoration and stormwater concepts
• Stantec Project & Design Team: J. Alex Forasté, P.E.; George Rhodes; Doug Beisch, P.E.;
Ryan Haynes; Daniel Malone, L.A.; Karen Hall, P.E., CFM; Loretta Cummings, Ph.D.; Jason
Mann.

Project Development
1. Walking the Park
2. Assessments & Evaluation
3. Stormwater Retrofits (Phase 1)
4. Stormwater Retrofits (Phase 2 & 3)
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1. Walking the Park
• Approx. 90 Acres
• Baseball/Softball Fields
• Tennis Courts
• Volleyball
• Basketball Courts
• Walking Trails
• Garden Plots
13

1. Walking the Park
• Observe Drainage Patterns
• Identify Existing drainage/
erosion related issues/
problems
• Identify potential areas
for stormwater & water
quality improvements
• Watershed Characterization
14

1. Walking the Park
• Identify tree, vegetation, and
natural resource inventory
and condition.
• Identify areas of high use
and high pedestrian traffic
areas (e.g. foot paths)
• Identify constraints
15

1. Walking the Park
• Existing Issues
16

1. Walking the Park
• Existing Issues
17

1. Walking the Park
• Existing Issues
18

1. Walking the Park
• Existing Issues
19

1. Walking the Park
• Existing Issues
20

1. Walking the Park
• Existing Issues
21

15 Potential Stormwater Retrofits Identified
Types of Practices/BMPs Considered:
o Bioretention Cells
o Engineered Dry Swales w/ & w/out check dams
o Step Pool Storm Conveyance
o Outfall Stabilization
o Stream Restoration
o Floodplain Reconnection
o Riparian Plantings
o Land Cover Conversion
o Rain Gardens
o Conversions of Existing Dry Detention
basin to Extended Detention w/ wetlands
o Permeable Pavement
o Soil Compost Amendments
o Wetland Creation
o Wetland Enhancement
22

For each potential BMP evaluated:
1.) Watershed & BMP Description
2.) Quantitative Assessment
3.) Qualitative Assessment
23

24
BMP Type ID # Phase
Step Pool Storm Conveyance 1 1
Step Pool Storm Conveyance 2 1
Floodplain Reconnection & Wetlands 3 2
Urban Bioretention Basin & Dry Swale 4 2
Engineered Dry Swale w/ Check Dams 5 2
Engineered Dry Swale 8 2
Urban Bioretention Basin 9 2
Converted Dry Detention Basin to Extended
Detention & Wetlands
10C 3
Bioretention Cell 11A 3
Bioretention Cell 11B 3
Engineered Dry Swale 11C 3
Engineered Dry Swale 11D 3

25
BMP #1 – Outfall Stabilization w/ Step Pools
Invasive Plant Removal

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Contributing Drainage Area = 39.56 Acres; storm drain network draining residential neighborhoods
Flow Events: Q1 = 34.7 cfs; Q100 = 230.16 cfs

27
Outfall Stabilization

28
Riparian Tree & Shrub Planting
Plant Palette Approx. #
Shrubs 490
Understory Trees 144
Canopy Trees 94
Specimen Trees 12
NOTE: Plant counts approximately only; planting palette
will be revised.

29
Contributing Drainage Area = 20+ Acres; storm drain network draining residential neighborhood & roadside ditch
Flow Events: Q1 = 12.8+ cfs; Q100 = 80+ cfs

30
2nd Pedestrian Bridge
Access & Drainage

31
Existing Channel Erosion
Channel Incision

32
Step Pool

33
BMP #3 – Floodplain Reconnection & Wetland Creation/Enhancement

34
BMP #3 – Floodplain Reconnection & Wetland Creation/Enhancement

35
BMP #4 – Bioretention Cell & Dry Swale

36
BMP #5 – Engineered Dry Swale w/ Check Dams

37
BMP #5 – Engineered Dry Swale w/ Check Dams

38
BMP #8 – Engineered Dry Swale

39
BMP #9 – Bioretention Basin

40
BMP #10C – Converted Dry Detention Basin to Extended Detention & Wetland Creation

41

42

43

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BMP #11A & 11B – Bioretention Cells

45
BMP #11C & 11D – Engineered Dry Swales

46
BMP #11C & 11D – Engineered Dry Swales

4. Stormwater Retrofits
47

Project Schedule
• Project Community Meeting (June 20, 2016)
• Phase 1 Design Completion ~ 2-3 months
• Phase 1 Construction ~ Fall 2016
• Phases 2 & 3 Design Completion ~ 9 months
• Phases 2 & 3 Construction ~ Late Summer/Fall 2017
* “Pardon our Dust” meetings to be held with contractor prior to construction of each phase.
48

Additional Information
For additional information, please contact
www.fairfaxcounty.gov/dpwes
DPWES Stormwater Planning Division 49
Joe Riley-Ryan, Project Manager
Matt Meyers, Branch Chief
Watershed Projects implementation Branch - North
703-324-5500
Joseph.Riley-Ryan@fairfaxcounty.gov
Matthew.Meyers@fairfaxcounty.gov

Nottoway Park Stormwater and Water Quality Improvements Phases 1, 2, & 3

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