Williamsburg Boulevard Williamsburg Boulevard Green Street Project - - PowerPoint PPT Presentation

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Williamsburg Boulevard Williamsburg Boulevard Green Street Project - - PowerPoint PPT Presentation

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Williamsburg Boulevard Williamsburg Boulevard Green Street Project Green Street Project June 13, 2012 June 13, 2012 , Williamsburg Middle School Williamsburg Middle School Relevant Outreach Relevant Outreach Relevant Outreach Relevant

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Williamsburg Boulevard Williamsburg Boulevard Green Street Project Green Street Project

June 13, 2012 June 13, 2012 , Williamsburg Middle School Williamsburg Middle School

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Relevant Outreach Relevant Outreach Relevant Outreach Relevant Outreach

  • November 12, 2008:

November 12, 2008: Introduction to Little Introduction to Little Pimmit Pimmit Run Watershed Retrofits Workshop, Run Watershed Retrofits Workshop, Yorktown High School Yorktown High School

  • June 4, 2009:

June 4, 2009: Little Little Pimmit Pimmit Run Watershed Run Watershed Retrofit Study Results Workshop, Yorktown High Retrofit Study Results Workshop, Yorktown High School School School School

  • April 27, 2011:

April 27, 2011: Williamsburg Median Green Williamsburg Median Green Street Project Williamsburg Middle School Street Project Williamsburg Middle School Street Project, Williamsburg Middle School Street Project, Williamsburg Middle School

  • June 13, 2012:

June 13, 2012: Williamsburg Median Green Williamsburg Median Green Street Project Update Williamsburg Middle Street Project Update Williamsburg Middle Street Project Update, Williamsburg Middle Street Project Update, Williamsburg Middle School School

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What is a Green Street? What is a Green Street?

A green street incorporates landscape features A green street incorporates landscape features that reduce the impact of polluted runoff on our that reduce the impact of polluted runoff on our that reduce the impact of polluted runoff on our that reduce the impact of polluted runoff on our streams and the Chesapeake Bay. streams and the Chesapeake Bay.

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Rain Gardens Rain Gardens

A landscaped A landscaped A landscaped A landscaped depression depression with the with the ability to capture, ability to capture, temporarily retain, temporarily retain, and filter surface and filter surface runoff runoff runoff runoff A A rain garden is a storm rain garden is a storm water treatment facility. water treatment facility.

Al k Al k

Fairlington Community Center

Also known as: Also known as: Bioretention Bioretention, , Biofilter Biofilter, , Bioretention Bioretention Filter, Filter, Bioretention Bioretention Basin Basin

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Green Street Green Street Rain Garden Rain Garden

Runoff

Ground surface Overflow str Water Surface

Plants Plants 6”- 12” ponding area 3” mulch 2’ - 3’ soil 3 mulch underdrain 1-2’ coarse gravel 3”- 6” pea gravel

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Most of Arlington County developed Most of Arlington County developed without without stormwater stormwater management management

Storm drain

without without stormwater stormwater management management

Storm drain to local stream To the 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 Effect of Urbanization

Impervious f surface Runoff speed p and volume Water Quality G d t Groundwater supply Stream health

Stream Corridor Restoration, FISRWG, 1998

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Chesapeake Bay

Required Pollution Reductions - 2025

Nitrogen 7% Phosphorus 13% S di t 18% Sediment 18% 3,000 streetscape retrofit projects projects

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Impervious Surfaces in Arlington Impervious Surfaces in Arlington

Roads Buildings Parking Lots Sidewalks Driveways Other

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

Impervious cover Impervious cover in Arlington = 41% or 6867 acres

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Stormwater Stormwater Master Plan Update Master Plan Update p

  • Storm Sewer Capacity

Storm Sewer Capacity Analysis Analysis

  • County

County-

  • wide

wide stream stream inventory inventory

  • Watershed retrofit plans

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

  • runoff. Each plan

Each plan contains an inventory of projects contains an inventory of projects contains an inventory of projects. contains an inventory of projects.

  • Rain gardens

Rain gardens

  • Removing pavement/impervious surface

Removing pavement/impervious surface g Little Little Pimmit Pimmit Run Watershed Retrofit Plan Run Watershed Retrofit Plan htt // li t /d t t /E i t htt // li t /d t t /E i t http://www.arlingtonva.us/departments/Environment http://www.arlingtonva.us/departments/Environment alServices/Sustainability/page75627.aspx alServices/Sustainability/page75627.aspx

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Retrofit Ranking Criteria Retrofit Ranking Criteria

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Project Components Project Components Project Components Project Components

  • Two rain gardens (1 in each median

Two rain gardens (1 in each median

  • Two rain gardens (1 in each median

Two rain gardens (1 in each median section) between 33 section) between 33rd

rd and 34

and 34th

th Rds

Rds N N

  • New median curb improved intersections

New median curb improved intersections

  • New median curb, improved intersections

New median curb, improved intersections and repaving and repaving N t b t Old D i i N t b t Old D i i

  • New canopy trees between Old Dominion

New canopy trees between Old Dominion

  • Dr. and 33
  • Dr. and 33rd

rd Rd N and between 35

Rd N and between 35th

th St and

St and 34 34th

th Rd N

Rd N 34 34th

th Rd N.

Rd N.

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New Project Elements New Project Elements New Project Elements New Project Elements

  • Addition of

Addition of forebays forebays (34 (34th

th Rd to 34

Rd to 34th

th St rain

St rain

  • Addition of

Addition of forebays forebays (34 (34 Rd to 34 Rd to 34 St rain St rain garden) garden)

  • Planting plan for rain gardens

Planting plan for rain gardens

  • Planting plan for rain gardens

Planting plan for rain gardens

  • Coordination with 36” water main project

Coordination with 36” water main project

  • Coordination with Old Dominion Drive

Coordination with Old Dominion Drive Pedestrian Improvement Project Pedestrian Improvement Project

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Williamsburg Green Street Williamsburg Green Street g

a) 4 sections b) 3 ti b) 3 sections

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Williamsburg Green Street Williamsburg Green Street

36” Water Main a) 4 sections b) 3 sections b) 3 sections

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Rain Garden Drainage Areas Rain Garden Drainage Areas Rain Garden Drainage Areas Rain Garden Drainage Areas

  • Total drainage area: 1.8 acres

Total drainage area: 1.8 acres g

  • Impervious area treated: 1.1 acres

Impervious area treated: 1.1 acres

  • Water treated:

Water treated: 4458 4458 ft ft3 (33 345 33 345 gallons) gallons)

  • Water treated:

Water treated: 4458 4458 ft ft3 (33,345 33,345 gallons) gallons)

A B A B

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5-8” River Rock Curb cut Concrete weir Pipe Concrete weir 3-5” River Rock

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Forebays Forebays

  • y
  • Receive

Receive stormwater stormwater

  • Slow runoff

Slow runoff

  • Prevent erosion

Prevent erosion

  • M k

i d i M k i d i

  • Make rain garden easier

Make rain garden easier to maintain to maintain

  • Decrease rain garden

Decrease rain garden g depth depth

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Williamsburg Williamsburg Bioretention Bioretention Typical Cross Typical Cross-

  • Section

Section

plants 6” curb 13’ 6” 3” mulch 3’ soil 1’ 2’ 3” pea gravel 1’ gravel 1 – 2 Max 2 ¼ ’ underdrain underdrain

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Trees and Plants Trees and Plants Trees and Plants Trees and Plants

  • 14 trees and 2 shrubs will be removed; 2

14 trees and 2 shrubs will be removed; 2

  • 14 trees and 2 shrubs will be removed; 2

14 trees and 2 shrubs will be removed; 2 transplanted transplanted

  • Includes 3 mature trees (> 10

Includes 3 mature trees (> 10 dbh dbh) – all all

  • Includes 3 mature trees (> 10

Includes 3 mature trees (> 10 dbh dbh) ) – all all exhibiting signs of stress exhibiting signs of stress

  • 7 canopy trees; 7 small trees and

7 canopy trees; 7 small trees and ±16 16

  • 7 canopy trees; 7 small trees and

7 canopy trees; 7 small trees and ±16 16 shrubs will be planted shrubs will be planted N fl i i l d N fl i i l d

  • Numerous flowering perennials and

Numerous flowering perennials and grasses grasses

  • All plants will be native, salt tolerant

All plants will be native, salt tolerant

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Rain Garden Planting Plan Rain Garden Planting Plan Rain Garden Planting Plan Rain Garden Planting Plan

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Allegheny serviceberry Sea Oats Purple Coneflower Winterberry Beardtongue Smooth blue aster Obedient plant

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Maintenance Maintenance Maintenance Maintenance

  • Initially after any large storms

Initially after any large storms

  • Initially, after any large storms

Initially, after any large storms

  • Thereafter, quarterly

Thereafter, quarterly R di t R di t

  • Remove sediment

Remove sediment

  • Weed, inspect, replant, prune plants

Weed, inspect, replant, prune plants

  • Remove trash

Remove trash

  • Make sure

Make sure underdrain underdrain overflow all pipes

  • verflow all pipes
  • Make sure

Make sure underdrain underdrain, overflow, all pipes , overflow, all pipes and catch basins working correctly and catch basins working correctly

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Construction Schedule Construction Schedule Construction Schedule Construction Schedule

  • Construction

Construction – Spring 2013 Spring 2013 p g p g

  • Coordinated with 36” water main project

Coordinated with 36” water main project

  • Water main constructed in 2 phases with

Water main constructed in 2 phases with

  • Water main constructed in 2 phases with

Water main constructed in 2 phases with intersection at 35 intersection at 35th

th St N

St N – – Fall 2013 Fall 2013

  • P

i b t Gl b d 33 P i b t Gl b d 33rd

rd Rd N

Rd N

  • Paving between Glebe and 33

Paving between Glebe and 33rd

rd Rd N

Rd N – Spring 2014 Spring 2014

  • Construction of median between Old

Construction of median between Old Dominion and 33 Dominion and 33rd

rd Rd N

Rd N – – constructed as constructed as part of Old Dominion project. part of Old Dominion project.

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JUNE 2011

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SEPT 2011 MAR 2012

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Questions?? Questions?? Q

  • Contact info

Contact info: : Christin Jolicoeur Christin Jolicoeur

 Phone: (703) 228

Phone: (703) 228-

  • 3588

3588 ( ) ( )

 Email:

Email: cjolicoeur@arlingtonva.us cjolicoeur@arlingtonva.us Green Streets Green Streets

www.arlingtonva.us/departments/EnvironmentalServi www.arlingtonva.us/departments/EnvironmentalServi ces/Sustainability/page81126.aspx ces/Sustainability/page81126.aspx

Little Little Pimmit Pimmit Run Watershed Retrofit Plan Run Watershed Retrofit Plan

www.arlingtonva.us/departments/EnvironmentalServi www.arlingtonva.us/departments/EnvironmentalServi g p g p ces/Sustainability/page75627.aspx ces/Sustainability/page75627.aspx

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36” Water Main Alignment 36” Water Main Alignment

PHASE III PHASE II