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

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 n

Intr oduc 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 

T oda 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 oje c t!  Pr oje c t Sc he dule  Br e akout to Boar ds

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

Wa te r she d 101 Impac ts of Unmanage d Stor mwate r Runoff

What is the County doing to pr ote 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 - M unic ipa l S e pa ra te S to rm S e we r S yste 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 Rain Gardens at Schools Stream Restoration

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 ovide wate r quality tr e atme nt for stor mwate r r unoff fr om r oads whic h r e pr e se nt appr ox. 1/ 3 of impe r vious sur fac e s in Montgome r y County. Bioretention Gardens Underground Structures Rain Gardens Tree Boxes

Whe r e will GRE E N ST RE E T S be ?  Selected areas within the Public Right-of-Way ROW Public Right-of-Way Be twe e n Side walk and Cur b

How Do Rain Gardens Work? During the Ra in Dry 48 hrs la te r , May 16 th 2016 , May 14 th 2016 T e nbr ook Dr T e nbr ook Dr

Whe r e Ar e GRE E N ST RE E T S Pr oje c ts in Montg ome r y County? Comple te d Pr oje c ts (9) Arc o la Ave F o 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 oje 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 o re st Ca nno n Ro a d Spring b ro o k E sta te s

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

SL IGO WOODS GRE E N ST RE E T S 85 Pr ac tic e s

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)

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

GRE E N ST RE E T S Dur ing Constr uc tion  Approximately 4-6 weeks to get from Excavation to Ready for Planting Excavation & Backfill Concrete Work Ready for Planting Planting

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

Rain Garden Planting Options

Pr oje c t Sc he dule Pr oje c t Pha se s Da te s Pr e liminar y Asse ssme nt Summe r – F all 2014 1 st Public Me e ting Nove mbe r 18, 2015 F ie ld Sur ve y and T r e e Spr ing 2016 Asse ssme nt Soil Bor ings Summe r 2016 2 nd Public Me e ting Oc tobe r 24, 2016 Pe r mit De sign Summe r 2017 3 r d Public Me e ting Nove mbe r 16, 2017 We Are He re Community Walk Mar c h 2018 F inal Plan Spr ing 2019 Constr uc tion Apr il 2019 – June 2020

Ra inSc a pe s T e c hnique s

Que stions?  F or 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