Workshop Lower Four Mile Run, Roaches Run, Rocky Run, Potomac - - PowerPoint PPT Presentation

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Apr 26, 2023 176 likes •433 views

Watershed Planning Workshop Lower Four Mile Run, Roaches Run, Rocky Run, Potomac Palisades May 30, 2012 Walter Reed Community Center Watershed Planning Result is an inventory of potential stormwater retrofit projects. Initiated May

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Watershed Planning Workshop

Lower Four Mile Run, Roaches Run, Rocky Run, Potomac Palisades

May 30, 2012 Walter Reed Community Center

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Watershed Planning

Result is an inventory of potential stormwater

retrofit projects.

Initiated May 2008
Contracted to Center for Watershed Protection
Anticipates Chesapeake Bay clean-up

requirements

Part of Arlington’s Stormwater Master Plan

update

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Stormwater Master Plan Update

Storm Sewer Capacity Analysis to study

the County's current storm sewer pipes.

County-wide stream inventory to assess

stream conditions and prioritize stream restoration projects.

Watershed plans to identify locations where

stormwater treatment facilities can be added to help slow down and filter polluted stormwater runoff.

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Arlington’s Watersheds

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Chesapeake Bay

Arlington’s Pollutant Reduction Requirements - 2025

Nitrogen 7.3% Phosphorus 12.8% Sediment 17.9% This means capturing & treating the stormwater from = 4500 acres = 36,000 homes

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Storm drain to local stream… To the Potomac River On to the Chesapeake Bay

Water in storm drains does not go to a treatment plant…

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Effect of Urbanization on Watersheds

Arlington County 41%

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Severe streambank erosion and habitat degradation

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Stormwater Retrofits

A retrofit is a stormwater management facility designed to slow and treat polluted stormwater runoff that is currently uncontrolled.

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Why Stormwater Retrofits?

Stormwater retrofits provide our best
pportunities to improve watershed health, along

with redevelopment and stream restoration.

Required to meet Chesapeake Bay clean-up

goals.

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Why Stormwater Retrofits?

Stormwater retrofits:

Clean and filter pollutants from stormwater
Slow and temporarily store stormwater runoff
Improve water quality in our local streams

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Impervious Surfaces in Arlington

34% 30% 16% 8% 7% 5%

Roads Buildings Parking Lots Sidewalks Driveways Other

Impervious cover in Arlington = 41% or 6867 acres

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Stormwater retrofitting on private property is essential for significant change.

Rain Garden

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Homeowner retrofit examples Cistern Rain Garden

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Green roofs

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Homeowner retrofit examples Rain Barrel(s) Pervious Pavement

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StormwaterWise Landscapes Incentive Program

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To Learn More

Stormwater Master Plan Update

http://www.arlingtonva.us/departments/EnvironmentalServices/Sustainability/page74076.aspx

Watershed Retrofit Planning

http://www.arlingtonva.us/departments/EnvironmentalServices/Sustainability/page67082.aspx

StormwaterWise Landscapes

www.arlingtonva.us/stormwaterwise

Rain Gardens for Homeowners Workshops

http://www.novaregion.org/index.aspx?NID=977

Rain Barrel Workshops & Sales

http://www.arlingtonenvironment.org/barrel.php

Green It! Workshop Series

http://www.arlingtonva.us/portals/topics/Climateevents.aspx

Like us on Facebook! www.facebook.com/#!/ArlingtonDES

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Plan Implementation

58% of County assessed, 925 retrofit projects in

inventory

Established a Green Streets Program
2 projects constructed
Multiple projects in design
Williamsburg Blvd median (Old Dominion to 35th St N)
8th St S (at Monroe St S)
S Hayes St at Pentagon City
$2.5 million budgeted for FY 13-17

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18 55 76 64 31 42 53 47 45 45 38 30 34 41 Palisades Colonial Village Branch Rosslyn Rocky Run Cemetary/Pentagon Lower Long Branch Roaches Run Virginia Highlands Nauck Branch Lower Four Mile Run Stohman's Run Rixey Branch Pimmit Run, Mainstem County

% Impervious Cover - 2009