Watershed Planning Watershed Planning WorkshopWorkshopWorkshopWorkshopWindy Run Spout Run Lubber RunWindy Run Spout Run Lubber RunWindy Run, Spout Run, Lubber Run Windy Run, Spout Run, Lubber Run and Doctor’s Branchand Doctor’s Branch

September 19, 2011September 19, 2011p ,p ,Washington Washington -- Lee High SchoolLee High School

Arlington’s watersheds Chesapeake Bay watershedwatershed

Watershed Watershed PlanningPlanning

CountyCounty--wide effort initiated May 2008; first wide effort initiated May 2008; first meeting for these watersheds in January 2011meeting for these watersheds in January 2011meeting for these watersheds in January 2011meeting for these watersheds in January 2011

Contracted to Center for Watershed ProtectionContracted to Center for Watershed Protection F h t h d lt i i t fF h t h d lt i i t f For each watershed, result is an inventory of For each watershed, result is an inventory of

potential potential stormwaterstormwater retrofit projects.retrofit projects. Anticipates Chesapeake Bay cleanAnticipates Chesapeake Bay clean upup Anticipates Chesapeake Bay cleanAnticipates Chesapeake Bay clean--up up

requirementsrequirements http://www arlingtonva us/departments/Environmhttp://www arlingtonva us/departments/Environm http://www.arlingtonva.us/departments/Environmhttp://www.arlingtonva.us/departments/Environm

entalServices/epo/page67082.aspxentalServices/epo/page67082.aspx Part of Arlington’sPart of Arlington’s StormwaterStormwater Master PlanMaster Plan Part of Arlington s Part of Arlington s StormwaterStormwater Master Plan Master Plan

UpdateUpdate

StormwaterStormwater Master Plan UpdateMaster Plan Updatepp

Stormwater Master Plan (1996) and Watershed Stormwater Master Plan (1996) and Watershed ( )( )Management Plan (2001) will be updated and Management Plan (2001) will be updated and combined into a comprehensive Master Plan.combined into a comprehensive Master Plan.

Storm Sewer Capacity AnalysisStorm Sewer Capacity Analysis to study the to study the County's current storm sewer pipes.County's current storm sewer pipes.

CountyCounty--wide stream inventorywide stream inventory to assess stream to assess stream conditions and prioritize stream restoration projects. conditions and prioritize stream restoration projects.

Watershed retrofit plansWatershed retrofit plans to identify locations where to identify locations where stormwater treatment facilities can be added to help stormwater treatment facilities can be added to help slow down and filter stormwater runoffslow down and filter stormwater runoffslow down and filter stormwater runoff.slow down and filter stormwater runoff.

StormwaterStormwater RetrofitsRetrofitsStormwaterStormwater RetrofitsRetrofitsA A retrofitretrofit is a is a stormwaterstormwater management facility management facility g yg y

designed to store, infiltrate, and/or filter designed to store, infiltrate, and/or filter stormwaterstormwater runoff from a contributing drainage runoff from a contributing drainage

ffarea for which a area for which a stormwaterstormwater management management facility currently does not exist.facility currently does not exist.

Impervious cover in Arlington County - 2007

Alley0.2%

Airport3.8%

Buildings30 1%

Handicap ramp0.1% Driveway

7.4%

30.1%

Parking lot15.7%

Paved median0.6%

Sidewalks8.4%

RoadsImpervious cover Roads33.8%Impervious cover

in Arlington = 41% or 6867 acres

Effect of Urbanization on WatershedsEffect of Urbanization on Watersheds

Impervious surface

Runoff speed and volume

Water Quality

Groundwater supplysupply

Stream Corridor Restoration, FISRWG, 1998

Effect of Urbanization on WatershedsEffect of Urbanization on Watersheds

Severe streambank erosion and habitat degradation

WhyWhy StormwaterStormwater Retrofits?Retrofits?Why Why StormwaterStormwater Retrofits?Retrofits?County streams are impacted.County streams are impacted.y py pMost Most development occurred before development occurred before

regulations that protect water qualityregulations that protect water qualityregulations that protect water quality regulations that protect water quality and and streams were enacted.streams were enacted.

StormwaterStormwater retrofitsretrofits provide our bestprovide our best StormwaterStormwater retrofitsretrofits provide our best provide our best opportunities to improve watershed opportunities to improve watershed health, along with redevelopment and health, along with redevelopment and t t tit t tistream restoration.stream restoration.

Will be required to meet Chesapeake Will be required to meet Chesapeake B lB l llBay cleanBay clean--up goals.up goals.

WhyWhy StormwaterStormwater Retrofits?Retrofits?Why Why StormwaterStormwater Retrofits?Retrofits?StormwaterStormwater retrofits:retrofits:StormwaterStormwater retrofits:retrofits: Clean and filter pollutants from runoffClean and filter pollutants from runoff Slow and temporarily storeSlow and temporarily store stormwaterstormwater runoffrunoff Slow and temporarily store Slow and temporarily store stormwaterstormwater runoffrunoff Improve water quality in our local streamsImprove water quality in our local streams

Limitations of Watershed RetrofitsLimitations of Watershed RetrofitsLimitations of Watershed RetrofitsLimitations of Watershed Retrofits Time and funding limitations mean projects will Time and funding limitations mean projects will

be implemented incrementallybe implemented incrementallybe implemented incrementally.be implemented incrementally. On average, assessments indicate about 10% On average, assessments indicate about 10%

of impervious area can be retrofittedof impervious area can be retrofittedof impervious area can be retrofitted.of impervious area can be retrofitted. Retrofits alone cannot solve Retrofits alone cannot solve current flooding, current flooding,

infrastructure and stream erosion problemsinfrastructure and stream erosion problems..infrastructure and stream erosion problemsinfrastructure and stream erosion problems.. County must County must fund and undertake fund and undertake infrastructure infrastructure

updates updates and and stream restoration projects in stream restoration projects in pp p jp jaddition to retrofits.addition to retrofits.

Retrofits on private property are essential for Retrofits on private property are essential for significant changesignificant changesignificant change.significant change.

Watershed Characteristicsate s ed C a acte st csWindy Run, Spout Run, Lubber Run and

Doctor’s BranchDoctor s Branch

erus

Cov

em

perv

iou

% Im

Watershed CharacteristicsWindy Run Spout Run Lubber Run andWindy Run, Spout Run, Lubber Run and

Doctor’s Branch Roads and buildings make up the majority of

impervious surfaces in all watersheds Windy Run Windy Run –

• largely single-family residential (74%); • Driveway is greater than average proportion of

i i (15%)impervious area (15%) Spout Run, Lubber Run and Doctor’s Branch

• 10-15% commercial; ;• greater proportion of multi-family residential;• Pollutant hotspots more prevalent

Retrofits on public land limited Retrofits on public land limited Private retrofits are also needed!

GREG’S TALK

Next StepsNext StepsNext StepsNext Steps Select projects from the inventory for Select projects from the inventory for

concept developmentconcept development Additional field work to develop conceptAdditional field work to develop concept Additional field work to develop concept Additional field work to develop concept

designsdesigns Final reportFinal report Final reportFinal report

Plan ImplementationPlan Implementationpp 606 total projects in inventory606 total projects in inventory

1 j t P t i k H D ( t 91 j t P t i k H D ( t 9thth Rd) t t dRd) t t d 1 project Patrick Henry Dr (at 91 project Patrick Henry Dr (at 9thth Rd) constructedRd) constructed 8 Green Streets projects in design8 Green Streets projects in design 10.1 acres of impervious area to be treated10.1 acres of impervious area to be treated

•• Williamsburg Blvd median (Old Dominion to 35th St N)Williamsburg Blvd median (Old Dominion to 35th St N)•• Williamsburg Blvd median (Harrison to Edison N)Williamsburg Blvd median (Harrison to Edison N)•• Kensington Blvd (at 33Kensington Blvd (at 33rd rd St N)/32nd St N (at Kensington)St N)/32nd St N (at Kensington)

J h M h ll D diJ h M h ll D di•• John Marshall Dr median John Marshall Dr median •• S Hayes St at Pentagon CityS Hayes St at Pentagon City•• 88thth St S (at Monroe St S)St S (at Monroe St S)•• 88 St S (at Monroe St S) St S (at Monroe St S)

$2 million budgeted for FY 11$2 million budgeted for FY 11--16 16

Resources for HomeownersResources for HomeownersResources for HomeownersResources for HomeownersRain Rain Gardens for Homeowners Gardens for Homeowners Workshops Workshops –– Oct 1Oct 1

Learn how to properly locate, design, construct and maintain a Learn how to properly locate, design, construct and maintain a smallsmall--scale rain garden. scale rain garden. http://www.novaregion.org/index.aspx?NID=977http://www.novaregion.org/index.aspx?NID=977

Build Build Your Own Rain Your Own Rain Barrel Workshops & Barrel Workshops & Rain Barrel Sales Rain Barrel Sales –– Oct 15Oct 15httphttp://www.arlingtonenvironment.org/barrel.php://www.arlingtonenvironment.org/barrel.php

Green It! Workshop SeriesGreen It! Workshop SeriesGreen It! Workshop SeriesGreen It! Workshop Serieshttp://www.arlingtonva.us/portals/topics/Climateevents.aspxhttp://www.arlingtonva.us/portals/topics/Climateevents.aspx

Chesapeake Conservation Landscaping CouncilChesapeake Conservation Landscaping Council

Rain Barrel

Chesapeake Conservation Landscaping CouncilChesapeake Conservation Landscaping Councilhttp://www.chesapeakelandscape.orghttp://www.chesapeakelandscape.org

Questions??Questions??Questions??Questions?? Contact info:Contact info: Contact info:Contact info:

Phone: (703) 228Phone: (703) 228--35883588 Email:Email: cjolicoeur@arlingtonva uscjolicoeur@arlingtonva us Email: Email: cjolicoeur@arlingtonva.uscjolicoeur@arlingtonva.us Web: Web: www.arlingtonva.uswww.arlingtonva.us

ResidentsResidentsResidentsResidentsEnvironmentEnvironmentWatershed ManagementWatershed ManagementWatershed ManagementWatershed Management

http://www co arlington va us/departments/Environhttp://www co arlington va us/departments/Environhttp://www.co.arlington.va.us/departments/Environhttp://www.co.arlington.va.us/departments/EnvironmentalServices/epo/page74076.aspxmentalServices/epo/page74076.aspx

Incentive Program for HomeownersIncentive Program for HomeownersIncentive Program for HomeownersIncentive Program for Homeowners

Partnership withPartnership with ArlingtoniansArlingtonians for a Cleanfor a Clean Partnership with Partnership with ArlingtoniansArlingtonians for a Clean for a Clean EnvironmentEnvironment

In pilot year providing 40 matching grantsIn pilot year providing 40 matching grants In pilot year, providing 40 matching grants In pilot year, providing 40 matching grants of $500of $500--$1000 to homeowners for $1000 to homeowners for sustainablesustainable stormwaterstormwater projectsprojectssustainable sustainable stormwaterstormwater projects.projects.

Launching 2011Launching 2011--2012.2012. http://www.arlingtonva.us/departments/Enhttp://www.arlingtonva.us/departments/En

vironmentalServices/epo/page74076.aspxvironmentalServices/epo/page74076.aspx