sligo woods green streets project...nov 16, 2017 · sligo woods green streets project...
TRANSCRIPT
Sligo Woods Green Streets Project
Environmentally Friendly Landscapes for Healthy Watersheds
Permit Design Presentation November 16, 2017
www.montgomerycountymd.gov/watershedrestoration
Introductions
Jason Alwine Project Manager, Gannett Fleming
Matt Abel Project Designer, iDesign
Paul Bogle DEP Senior Engineer
Doug Marshall DEP Watershed Planner
Other DEP Staff DEP Watershed Planner
Today’s Agenda
Watershed 101 What are Green Streets Your Green Streets Project! Project Schedule Breakout to Boards
Two Major Issues: Volume/Timing of Runoff
Water Quality
Watershed 101 What is Stormwater Runoff?
Water that does not soak into the ground becomes surface runoff. This runoff flows over hard surfaces like rooftops, driveways and parking lots collecting potential contaminants and flows: Directly into streams Into storm drain pipes, eventually
leading to streams Into Stormwater management facilities,
then streams
Watershed 101 Impacts of Unmanaged Stormwater Runoff
What is the County doing to protect and restore our Watersheds and Streams? Must meet regulatory requirements related to Federal Clean Water Act permit program
MS4 Permit - Municipal Separate Storm Sewer System New or upgraded stormwater facilities for 20% of existing impervious
surfaces that pre-date stormwater management requirements
Pond Retrofit Green Streets
Stream Restoration
Rain Gardens at Schools
Tree Boxes
What are GREEN STREETS?
A variety of small scale stormwater practices located along the street within the public right of way.
Provide water quality treatment for stormwater runoff from roads which represent approx. 1/3 of impervious surfaces in Montgomery County.
Rain Gardens Underground Structures Bioretention Gardens
Public Right-of-Way Between Sidewalk and Curb
ROW
Where will GREEN STREETS be?
Selected areas within the Public Right-of-Way
Tenbrook Dr, May 14th 2016 Tenbrook Dr, May 16th 2016
During the Rain Dry 48 hrs later
How Do Rain Gardens Work?
Where Are GREEN STREETS Projects in Montgomery County?
Completed Projects (9)
Arcola Ave
Forest Estates
White Oak
Dennis Ave
Donnybrook
Sligo Park Hills
Breewood
Amherst Ave
Franklin Knolls
Projects In Design (6)
Sligo Woods
Wheaton Woods
Manor Woods
Glenmont Forest
Cannon Road
Springbrook Estates
Upper Sligo Creek Restoration
Legend Area with Stormwater
Management
Area without Stormwater Management
Sligo Woods Green Streets Project Area
Upper Sligo Creek Watershed Boundary
SLIGO WOODS GREEN STREETS 85 Practices
Green Streets Practices In SLIGO WOODS
Rain Gardens (45) Tree Boxes (9) Underground (31)
GREEN STREETS Design Considerations
Constraints We Consider:
Pedestrian Safety Driveways Homeowner Usage Parking Demand Trees Utilities Slope Soils
Excavation & Backfill
GREEN STREETS During Construction
Concrete Work
Ready for Planting Planting
Approximately 4-6 weeks to get from Excavation to Ready for Planting
Maintenance MCDEP will visit monthly (on
average) Maintenance Team will:
Water plants, if needed Replace plants as needed Replenish mulch Remove weeds Remove sediment & trash
Rain Garden Planting Options
Project Schedule
Project Phases Dates
Preliminary Assessment Summer – Fall 2014
1st Public Meeting November 18, 2015
Field Survey and Tree Assessment
Spring 2016
Soil Borings Summer 2016
2nd Public Meeting October 24, 2016
Permit Design Summer 2017
3rd Public Meeting November 16, 2017
Community Walk March 2018
Final Plan Spring 2019
Construction April 2019 – June 2020
We Are Here
RainScapes Techniques
Questions?
For More Information: Doug Marshall 240-777-7767 [email protected] Project Webpage:
http://www.montgomerycountymd.gov/DEP/Restoration/ sligo-ballantrae-mcdonald-knolls.html