Sligo Woods Gr e e n Str e e ts Pr oje c t E nviro nme nta lly - - PowerPoint PPT Presentation

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Sligo Woods Gr e e n Str e e ts Pr oje c t E nviro nme nta lly F rie ndly L a ndsc a pe s fo r He a lthy Wa te rshe ds Pe r mit De sign Pr e se ntation Nove mbe r 16, 2017 www.mo ntg o me ryc o untymd .g o v/ wa te rshe dre sto ra tio

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SLIDE 1

Sligo Woods

Gr e e n Str e e ts Pr

  • je c t

E nviro nme nta lly F rie ndly L a ndsc a pe s fo r He a lthy Wa te rshe ds

Pe r mit De sign Pr e se ntation Nove mbe r 16, 2017

www.mo ntg o me ryc o untymd .g o v/ wa te rshe dre sto ra tio n

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SLIDE 2

Intr

  • duc tions

 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

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SLIDE 3

T

  • da y’s Ag e nda

Wate r

she d 101

What ar

e Gr e e n Str e e ts

Your

Gr e e n Str e e ts Pr

  • je c t!

Pr

  • je c t Sc he dule

Br

e akout to Boar ds

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SLIDE 4

T wo Major Issue s: Volume / T iming of Runoff Wate r Quality

Wa te r she d 101

What is Stor mwate r Runoff?

 Wa te r tha t do e s no t so a k into the

g ro und b e c o me s surfa c e runo ff. T his runo ff flo ws o ve r ha rd surfa c e s like ro o fto ps, drive wa ys a nd pa rking lo ts c o lle c ting po te ntia l c o nta mina nts a nd flo ws:

 Dire c tly into stre a ms  I

nto sto rm dra in pipe s, e ve ntua lly le a ding to stre a ms

 I

nto Sto rmwa te r ma na g e me nt fa c ilitie s, the n stre a ms

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SLIDE 5

Wa te r she d 101

Impac ts of Unmanage d Stor mwate r Runoff

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SLIDE 6

What is the County doing to pr

  • te c t and

r e stor e our Wate r she ds and Str e ams?

 Must me e t re g ula to ry re q uire me nts re la te d to

F e d e ra l Cle a n Wa te r Ac t pe rmit pro g ra m

 MS4 Pe rmit - Munic ipa l Se pa ra te Sto rm Se we r Syste m

 Ne w o r upg ra de d sto rmwa te r fa c ilitie s fo r 20% o f e xisting impe rvio us

surfa c e s tha t pre -da te sto rmwa te r ma na g e me nt re q uire me nts

Pond Retrofit Green Streets Stream Restoration Rain Gardens at Schools

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SLIDE 7

Tree Boxes

Wha t a r e GRE E N ST RE E T S?

 A var

ie ty of small sc ale stor mwate r pr ac tic e s loc ate d along the str e e t within the public r ight of way.

 Pr

  • vide wate r

quality tr e atme nt for stor mwate r r unoff fr

  • m r
  • ads whic h r

e pr e se nt appr

  • x. 1/ 3 of impe r

vious sur fac e s in Montgome r y County.

Rain Gardens Underground Structures Bioretention Gardens

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SLIDE 8

Public Right-of-Way

Be twe e n Side walk and Cur b

ROW

Whe r e will GRE E N ST RE E T S be ?

 Selected areas within the Public Right-of-Way

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SLIDE 9

T e nbr

  • ok Dr

, May 14th 2016 T e nbr

  • ok Dr

, May 16th 2016

During the Ra in Dry 48 hrs la te r

How Do Rain Gardens Work?

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SLIDE 10

Whe r e Ar e GRE E N ST RE E T S Pr

  • je c ts in Montg ome r

y County?

Comple te d Pr

  • je c ts (9)

Arc o la Ave F

  • re st E

sta te s White Oa k De nnis Ave Do nnyb ro o k Slig o Pa rk Hills Bre e wo o d Amhe rst Ave F ra nklin K no lls

Pr

  • je c ts In De sign (6)

Slig o Wo o d s Whe a to n Wo o d s Ma no r Wo o d s Gle nmo nt F

  • re st

Ca nno n Ro a d Spring b ro o k E sta te s

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SLIDE 11

Uppe r Slig o Cr e e k Re stor a tion

Legend

Area with Stormwater Management Area without Stormwater Management Sligo Woods Green Streets Project Area Upper Sligo Creek Watershed Boundary

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SLIDE 12

SL IGO WOODS GRE E N ST RE E T S

85 Pr ac tic e s

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SLIDE 13

Gr e e n Str e e ts Pr a c tic e s In SL IGO WOODS

Rain Gardens (45) Tree Boxes (9) Underground (31)

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SLIDE 14

GRE E N ST RE E T S De sig n Conside r a tions

Co nstra ints We Co nside r:

 Pe de stria n Sa fe ty  Drive wa ys  Ho me o wne r Usa g e  Pa rking De ma nd  T

re e s

 Utilitie s  Slo pe  So ils

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SLIDE 15

Excavation & Backfill

GRE E N ST RE E T S Dur ing Constr uc tion

Concrete Work Ready for Planting Planting

  • Approximately 4-6 weeks to get from Excavation to Ready for Planting
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SLIDE 16

Ma inte na nc e

 MCDE

P will visit monthly (o n a ve ra g e )

 Ma inte na nc e T

e a m will:

 Wa te r pla nts, if ne e de d  Re pla c e pla nts a s ne e de d  Re ple nish mulc h  Re mo ve we e ds  Re mo ve se dime nt & tra sh

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SLIDE 17

Rain Garden Planting Options

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SLIDE 18

Pr

  • je c t Sc he dule

Pr

  • je c t Pha se s

Da te s

Pr e liminar y Asse ssme nt Summe r – F all 2014 1st Public Me e ting Nove mbe r 18, 2015 F ie ld Sur ve y and T r e e Asse ssme nt Spr ing 2016 Soil Bor ings Summe r 2016 2nd Public Me e ting Oc tobe r 24, 2016 Pe r mit De sign Summe r 2017 3r

d Public Me e ting

Nove mbe r 16, 2017 Community Walk Mar c h 2018 F inal Plan Spr ing 2019 Constr uc tion Apr il 2019 – June 2020

We Are He re

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SLIDE 19

Ra inSc a pe s T e c hnique s

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SLIDE 20

Que stions?

F

  • r

Mor e Infor mation:

Do ug Ma rsha ll

240-777-7767

do ug la s.ma rsha ll@ mo ntg o me ryc o untymd.g o v

Pro je c t We b pa g e :

http://www.montgomerycountymd.gov/DEP/Restoration/ sligo-ballantrae-mcdonald-knolls.html