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Home My Public Portal AboutGreen Infrastructure for a Healthier Charles River Presentation - June 21, 2016 (PDF)Green,,.,I.t, JU wn Hall, i 41 4n -lilt ti lr r r a r�,, w ti A Horsley Witten Group Sustainable Environmental Solutions Rich Claytor, P.E. Janet Bernardo, P.E. horsleywitten.com 857-263-8193 Agenda Introduction & Grant Goals Stormwater & GI Overview Grant Work Completed to Date Discuss Candidate Sites Select 2 Pilot GI Projects for Further Consideration �Of M'&- all abowt ...this town." Horsley Witten Group Sustainable Environmental Solutions Introduction rant Goals THE COMMONWEALTH OF MAS&ACHUSF rrs Grant Project Funded through EXECUTIVE OFFICE OF ENERGY & ENVIRONMENTAL AFFAIRS the 604(b) Program for Water DEPARTMENT OF ENVIRONMENTAL PROTECTION ONE WINTER STREET, BOSTON. MA tw Afl- -- i Weia all abort ...this tpwn." Quality Assessment and Planning Increase Awareness Stormwater Issues Educate Stakeholders Identify Opportunities for Green Infrastructure Horsley Witten Group Sustainable Environmental Solutions Project Partners MassDEP Watertown Department of Public Works Watertown Department of Community Development and Planning Watertown Stormwater Advisory Committee Horsley Witten Group, Inc. �Of Weia all abw�t ...this tawn." Horsley Witten Group Sustainable Environmental Solutions Stormwater & Green Infrastructure Overview ft� A .-F Weia all ab- this tawn." Stormwater Basics GI Practices Benefits Limitations Costs Horsley Witten Group Sustainable Environmental Solutions Stormwater Basics precipitation evapotranspiralidn (10 ) r .}fir f� BEFORE Urbanization results in increased surface runoff prec-itatiorr evap-olransp rafion (5 ) VIL, AFTER Stormwater Basics At -10% impervious we begin to see: Water quality issues Impacts to biological communities Increased flooding Stream erosion Loss of recreational uses Shellfish bed closures Reduced baseflow and recharge Watertown is 49% impervious Watertown — Street Views T -7 ■.! i � � Tii � Wat�rr[�vn ceio�r,►,x,rot - .f�-�"- Horsley Witten Group Sustainable Environmental Solutions Weia all abw�t ...this tawn." Watertown — Stormwater r1 WWI!,Ffflir-Jk �rr,►,xlroAF -- Weis all abmt ... rhls town" Improvements 0 TOWN OF WATERTOWN Storm pram Outfafl ONy storm wader should flow from this pipe oto the river If ynu sea • cloudy or descalorep water. • ad orl the wader hawing from the pipe. or + water fiowng from the pipe dwirq dry v031her Wft V&CrE3"D"% DEW7t14E.W N'tB IC: M;P= m 617.972,6420 [l} 11 QYI 1A4. Horsley Witten Group Sustainable Environmental Solutions ow4L 1 _ r r - ■i r IJ t r� _ 1r ft I a .. - � i ' - a.. `• � - � I _ If y/ 1� PIF Amu .9 lu Al 71 i0v 5eo. dr Green Infrastructure Practices Non -Structural Practices Bioretention and Green Street Practices Permeable/Porous/Pervious Pavements Infiltration Practices Wetland Practices Water Quality Swales Rainwater Harvesting Green and Blue Roofs Non -Structural Practices Stormwater "passive" controls and/or programs designed to reduce runoff volume, reduce pollutants, and/or enhance infiltration. Practices: Impervious cover removal Open space preservation Natural landscaping Street sweeping Bioretention and Green Streets Shallow landscaped depression designed to capture stormwater runoff for treatment and/or infiltration through natural processes. Practice Variants: Bioretention Tree Filters Stormwater Planters Rain Gardens A&VAM AMWAM 1 r yrt.� r l.: 3. •.s Ati ! r r�- �l+S } 'r �•Ty' i Tree Trenches LEGEN 1. Sidew 2. Tree p 3. Catch 4. Roadv 5. Pland 6. Inflow 7. Stone S. Overfl 9. Existir ��MI�� Bioretention and Green Streets Benefits & Limitations Benefits Good runoff reduction & pollutant removal Good aesthetics — fits in with site landscaping Natural approach, affecting air quality, temperature, & habitat Moderate cost Limitations Not good on steep slopes — needs flat bottom Some clogging potential Limit drainage area to <10 acres Some maintenance required Permeable/Porous/Pervious Pavements Permeable surface material that allows rainfall to percolate through the media into underlying soils or drainage collection system. Practice Variants: Permeable pavers Porous asphalt Pervious concrete Proprietary materials (pre- cast pervious slabs, recycled tires/glass) Permeable Paver Options rU?�47�, y� yr l ♦ % �:j ��41; '•i � �_ - �� 't' ��i?'µv �F_��}:: �::`_ � _" �': +:� �� wl '. ice?'" :'s��1'CiF.y..` .. �F r � < ti�'i+.'_. y T y ' ..�'" -' r"� •�` 1. #�r '' Y{' +S4 i ,� -�W .� f 4 - Jr Yam._ 'A_ 1 �. � r t 4 3 - .A } �r�'' wF � y � .as` y ty F� X r { 4F f ,r *4 ;. �` Permeable/Porous/Pervious Pavements Benefits: Good runoff reduction, promotes recharge, excellent pollutant removal No additional space consumption Reduces need for sand/salt in winter Limitations: Not good on steep slopes High maintenance (e.g. vacuuming) to prevent clogging Require deeper groundwater and permeable soils Needs careful construction sequencing High cost Cost Considerations Capital cost ranges - Implementation is site specific and economy dependent. As designers and contractors become more familiar with controls, costs decrease. Design and testing - Green infrastructure typically requires an engineered design. Design costs may be more costly than conventional, but implementation costs can be less expensive. Land consumption - Most practices can be integrated into site design. Maintenance costs - Requires a change in mind -set and training, some specialized equipment. M ai'-ntenane,.,',. -.6Ts.nninsiderati Routine general maintenance and frequency -Practices � require initial inspection and early maintenance. Non -routine maintenance - infrequence t may require _ system overhaul. alk %W Specialized equipment and training -Mostly landscaping related for such activities as tree pruning, re -mulching, minor erosion gullying, etc.) �y Inspections and enforcement -Critical to overall long-term success. - Performance impacts -Many practices will still � may suffer aesthetically; clogging a real threat. nf-�- Grant Work Completed to Date HW met with DPW and CDPD Staff Utilized MassGIS & Town Mapping Evaluated Total Phosphorous by Land Use Reviewed Historical Bacteria Data at Outfalls Analyzed Soils, Outfalls, Catchment areas Attended SAC Meeting Identified 21 Potential Locations, Site Visits - Focused on Town -owned Property and ROWs W�t�fflirJiW A Weia all ab-4VW7al town. Horsley Witten Group LIA Sustainable Environmental Solutions LTY 21 Potential Locations to Install Green Infrastructure ;�xt ar 11 6 •I A ,�� Jq - .yam _ , f - x .t # • +- x. _ �� + 16 ram.'-" — _- -_--_ - -... •1 r:- �.1' -;;± - -.�. - _ I �'si Cr 1 • I I � • I � 71 'L' 1 Wr 4.1 +V = i .•i `��~' wn`i. .r rr+•C� 4�«,. _, ' n i., _ � •far , �_'' I - - - - . 74 tj _y �'�..r S fi' « .J�;!��7' �`�:, r.•f. '�•?•r f Yf "". �y r,] • rr. ` Ff. • -- ' �, 16'.f "Wf, .• � _ __�- r.�4' 27 ti„h, .'� t _iJ } ' ' 4 - - - - . • �ti� • fR ''+Y� � ` !. ~�'r � 1 . 1 .lam J � - '.4 . 73 �u - � _ 'y4*` w �..� y, �r ,DTP.. �r'�{, k'•' '- _,�i'r •r- ` �{ r ._r • __ - r" f-T5 :'. gi J_59.... •fF'slr k�'" 1 qp 162 Iti Y Soil Types of Catchment Areas fy�ar� 97 19 z 1� 527C f 13 11 665 526B $56 415C C54 s�64 Am 326 0 � �SSEi �= s 24d 21 s ,d 712 • - 20b 2� y� 13 3rqcteria Leve y. �~•. �� - ��,� a �� * ,. � ■1�'�1Y; ter. . ys M Ou¢Fa1i i Tye Outlafl8 Outf2119 iF Uu9afl36 per Outtro_m,. 4N yy x fi �m Ilk a a 2ugailf2 1wpt: OutlarU 33 IF. Ui 92HS J4 & 35 OF y l {.1. F * Outfa � r .■ ' fir' "' '1` +T �r ,� r - .1�� d s .:r r� • y"r*+� v[ moo• �4 ■ 'i w ■ ? 74 .. ly' Ir o' OUtfaR 39 I At • Aso is CY ;r '::F �^:s. -- �: • n3_ . ,�: � i�=■�.rfot sret�? , rl�':Y � ' f, eF,��•.� � ` , Outfaii 14 :. r it I l ' r ` ' , 1�s .r 1y '� Outfall 15 iv i S r� •d ■1 ■ [ lox 12 Candidate Sites Visibility, Cost, Maintenance Priority Catchment Areas Public Improvement Projects I 2ft. Contours 1 " = 50 Feet I May i AdminisL Buildil 410 1f f 4(` i Watertown ` Library e V ' Town I Parking Town Library Parking Lot GROUNDCOVERI GRASSES ZONE 0'-b" HIGH CURB GRADE Location Library Parking Lot Id. No. 'IA Impervious Area 0.34 acres Public Visibility High Cost Medium Priority Watershed lies Maintenance Low PI Design in Process Potential Potential BMP Bioretention Area CANOPY TREE N PLANTING BED 25'-0" O.0 MN. REQUIRED 3'-0' HIGH SHRUBS STORMWATER INLETS SPACED AS APPROPRIATE 38'-0" TYPICAL INTERIOR LANDSCAPING PLANTING BED 2ft. Contours 1 " = 50 Feet I / 41 Administration Building ! -.. t Wa Y L r PF� Town Hall — Roof Runoff r�A Location Town Hall Id. No. 1 B Impervious Area 0.01 acres Public Visibility High Cost Low Priority Watershed No Maintenance Low PI Design in Process Potential Potential BMP Rain Garden RAIN GARDEN DETNL CilAl,740�G IN 11 Main Street Corridor Location Main St. betty Waverly Ave. & Town Hall Id. No. 2 Impervious Area 0.85 acres Public Visibility High Cost Medium Priority Watershed No Maintenance Low PI Design in Process Yes Potential BMP Tree Trenches and Bioswales rvrnre► cdac �- . �� "�li�llllllll� Illilll Porter St. @ Boylston St. Location Porter St. at Boylston St. Id. No. 6 Impervious Area 0.55 acres Public Visibility Low Cast High Priority Watershed Yes Maintenance Law PI Design in Process No Potential BMP Bioretention Area 2ft. Contours 1 50 Feet Jt 0 100, ''��_ 71 A6. I Worcester @ Springfield Location Worcester St. at Springfield St. Id. No. 7 Impervious Area 0.09 acres Public Visibility Low Cost Medium Priority Watershed Yes Maintenance Low PI Design in Process No Potential BMP Fain Garden t axw wW mwrw wa - R N GARDEN DETAIL CiW.TiMG 2ft. Contours 1 " = 50 Feet L i i ' Ll low mom A 0 0 Grove St. @ Kondazian Location Grove St. at Kondazian St. Id. No. 8 Impervious Area 0.84 aces Public Visibility Low Cast High Priority Watershed Yes Maintenance Low PI Design in Process No Potential BMP Bioretention Area VIA C I� r .: x:' _fir a .7 ! 70,VlftIroexoTa"Op4ove •ys Si ..i ,f �• ,t. •S, 2ft. Contours 1" = 50 Feet ~` d I AL _4 Lowell School Location Lowell School Id. No. 9B Impervious Area 0.04 acres Public Visibility High Cost Low Priority Watershed Yes Maintenance Low PI Design in Process No Potential BMP Rain Barrels `� r Beacon Park @ Arsenal St. Location Beacon Park at Arsenal 5t. Id. No. 10 Impervious Area 0.4 acres Public Visibility Medium Cost Medium Priority Watershed No Maintenance Low PI Design in Process Yes Potential BMP Bioretention Area CANOPYTREE -IN PLANTING 9E0 Ox mim. REQUIRED GROUNDCOVERI 5'-0° HIGH GRASSES 70" SHRUBS ZONE f r _ t 0'-6" HIGH I CORE _ '%i.- .F1" ... GRADE VI STORMWATER INLETS SPACED AS APPROPRIATE 38'-0" TYPICAL INTERIOR LANDSCAPING PLANTING BED 2ft. Contours 1 - 75 Feet, �. Common St. @ Spring St. Location Common St. at Spring St. Id. No. 1 2A Impervious Area 0.48 acres Public Visibility High Cast Medium Priority Watershed No Maintenance Low PI Design in Process Yes Potential BMP Bioretention Area ioom 32 ` N� IN _ •A Jl 1 �1 • ■ 17 • \ • 38 t v �` 34 i Common St. Corridor Location Common St. Corridor Id. No. 12B Impervious Area 0.45 acres Public Visibility High Cost Medium Priority Watershed No Maintenance Low PI Design in Process Yes Potential BMP Tree Trenches and Bioswales irs 1" = 50 Feet _ - 7P y p - f . t r OR Ask Common St. @ Orchard St. Location Common St. at Orchard St. Id. No. 1 2C Impervious Area 0.07 acres Public Visibility High Cost Medium Priority Watershed No Maintenance Low PI Design in Process Yes Potential Bh�tP Tree Trenches and Bioswales 2ft. Contours 1" = 50 Feet --t ANINNW,` , 16 _. CONCORD ROAD Hosmer School Entrance Location Hosmer School Entrance Id. No. 1 5A Impervious Area 0.14 acres Public Visibility High Cost Medium Priority Watershed Yes Maintenance Low PI Design in Process No Potential BMP Bioretention Area CANOPY TREE N PLANTING BED Z5,-0" O.0 MN. REQUIRED GROUNDCOVERI 3'-0' HIGH GRASSES SHRUBS ZONE 0'-b" HIGH CURB GRADE STORMWATER INLETS SPACED AS APPROPRIATE 38'-01, TYPICAL INTERIOR LANDSCAPING PLANTING BED I 2ft. Contours 1 " = 50 Feet I mom o '�IsomI Hosmer Elementary yOVA f" b—qqpAp-�l r&l tar ,_, Soft - A - -:® Hosmer School Location Hosmer School Id. No. 15B Impervious Area 0.23 acres Public Visibility Medium Cost Medium Priority Watershed Yes Maintenance Low PI Design in Process No Potential BMP Bioswale I 2ft. Contours 1 " = 50 Feet I VON nj Middle School Rear Lot Location Middle School Fear Lot Id. No. 17 Impervious Area 0.19 acres Public Visibility Medium Cost Low Priority Watershed Yes Maintenance Low PI Design in Process No Potential BMP Bioswale CANOPY TREE �IN PLANTING BED ZS'-0" Ox mim. REQVIRE❑ GROUNDCOVERI 5�-O° HIGH GRASSES SHRUBS ZONE r _ t 0'-6° HIGH I CURB GRADE STORMWATER INLETS SPACED AS APPROPRIATE 38'-0" TYPICAL INTERIOR LANDSCAPING PLANTING BED I 2ft. Contours 1 " = 50 Feet I LAW 68 O'Connell Park Lot Location O'Connell Park Parking Lot Id. No. 20 Impervious Area 0.12 acres Public Visibility Medium Cast High Priority Watershed Yes Maintenance Medium PI Design in Process No Potential BMP Permeable Pavement 2ft. Contours 1" = 50 Feet Department of Public Works 4 L DPW — Parking Lot Location Department of Public Works Id. No. 21 Impervious Area 0.46 acres Public Visibility High Cost Low Priority Watershed Yes Maintenance Low PI Design in Process No Potential BMP Bioretention Area REGUHT" CANOPY THE GRWACOYERIGRA$$ES ' CAR OVERHANG ZONE GRpuNpCtivFRIGRaSSES CAR OVERHAK ZONE 'SHRLBS zae+E -o•r TCX RFpuiRED :,.ONE S6WIG GEMX - A S' HIGH CURR WI BE LOw STGRMWaTER IHLE iS a PLANTING PARKING SOIL GRACE '�—HAAIMUi PONDING LIRE a-----------------------. GRAvZL FABRIC BASE PIPE CCNNECTEC TO 6' TO 6' PERFORATED PIPE ON -BITE STORT"ATER MmECTED TO GM -SITE SYSTEM B'-0' MINIM Iri STORMWATER SYSTEM 12 Candidate Sites of ry T f 5 41 17G 6enron Hd r£ o..�M4.�r.,�,� nqr F Y � Paris b i $ In C Lrh 0 w 0.9h 't r ip� L• F1 p rr 11yrtWJ 7 I.lwrtsLA. X 4 u. 'ILI rb i 6 rh Im Uwal I kwa i� 3 b k J 4 yQ 11W ; n; 1 PAtAvburn R?R. r„¢ D _ Aiani,yru0d .a� 4 i i 4 P 4 * #i fi�ltl a Fj1QrRa 3 a� Sf ury a s o' a A. I i�i N�� 4► trx rro� ,y J 'ice s r3 * am W 91 p,i f S e T : a rrE per+ a +a a 1 gee s� {� O _ e~ q G1h�r��r� a qu Jr��n RI-.�4' i Armta n 'f a �Ae ira [jcW ,?Y fp 3. .51 In 4f lued �C fi � o �V 4U (�6L* Si,$p*#� +# �r�7 h #y} ti p r•cdi4Y/L` 9L4r � ikrmnlr Fh�raiF, � '�{ 'rafiSi` Lfurd El r.alria`rrn`r# SLS Y I rirl rn Oyu _ urQrrrh Rd +f r�°�oY +ire x ti gg } at St �z °'uryAwn ,.. -� rar 91 3 r r�¢ a in R uh[SI � r� Falk n,:i�i : i r• 4 'r � I .k 2 Pilot Projects Rank Sites Based on: Project Complexity —Cost Effectiveness — Impervious Area Public Education Constructability — Soils, Slopes Maintenance Next Steps Select 2 Pilot Sites Develop 30% Design Plans Develop Green Infrastructure Tracking System for Watertown 1p ]E�:_a��1Coocrii o00 Watertown Department of Public Works www.watertownd pw.orq 617-972-6420 Stormwater Advisory Committee www.watertownstormwater. orq IFM� �PI1�11� IM1�7e ai4� about ...this tower"' Horsley Witten Group, Inc. www. horsleywitten.com Rich Claytor, P.E. Janet Carter Bernardo, P.E. 857-263-8193 Horsley Witten Group +� Sustainable Environmental Solutions �N {� r�r• k. r'.k. - •'F'•'' r - � -fin of �{r r ' r r t r�� '.�r� �t � • •r_ 1�'• � ; _a err:: � - ,''fir• •` 19 S •.•��• v.:� .. _ r _ .1 � �+r 'r a ~, r '',.r�ii ti`• .ti�. F �.,. �'.f�'. kx� ti - ', ''fir! •• � �F:' i. ', �, ,�'ti •x• . ;•.�-.. .� .- �,1,... : �•� •rr • •� _ r rftiA • , F �rf • - = �., � i }' +h- ti; '•% - K'-'Y' _ ti 'fle ' f rJ1� - .'.� }Fr'fr'i'�a•kl-I`{+ _ 'm, yam* -:� -•. ,ti y -,r ,, { r � L' a i r' i r} f '�I { % 1j` ti s' rk F T .� '',r,yy • r � J v• _' •+ 'k_� -.•.ems{--}��' r -�i k'� :r '� �... �~ - . _ �. � ti• rr� Or 9— W-—.-:� 1jl .ram - '�' . �' � � L ��-r • r ti AA