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A Framework for Coastal Resilience

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A Framework for Coastal Resilience SUMMARY ELEMENTS 0' 30' 60' LONG WHARF DRIVE AREA OF ROCK REVETMENT 0 1/2" 1" · SIGNIFICANT EROSION OF THE PARK EDGE HAS OCCURRED TO BE CONSTRUCTED IN 2016 IN THE LAST FEW YEARS · THE CITY PLANS TO CONSTRUCT A STONE REVETMENT ALONG THE ERODING EDGE OF THE PARK · AN OPPORTUNITY IS AVAILABLE TO PURSUE A PROJECT IN THE INTERTIDAL ZONE TO RETAIN SEDIMENT AND INCREASE THE AREA OF VEGETATION · THE “REEF BALL” PROJECT TESTED IN STRATFORD PROVIDES A LOCAL EXAMPLE OF A “LIVING SHORELINE” PROJECT · THE REEF BALL LINES ARE SET WITH THEIR BASES ABOVE THE MLW (-3.3 FEET) AT ELEVATIONS -1.0 TO -2.0 FEET · WITH SEA LEVEL RISE OF 1-2 FEET, THE REEF BALLS 1 SHOULD REMAIN EFFECTIVE Ò SUPPLEMENTAL SPARTINA LINE OF REEF BALLS AT www.miloneandmacbroom.com PLANTINGS TO INCREASE 99 Realty Drive Cheshire, Connecticut 06410 (203) 271-1773 Fax 272-9733 MARSH FUNCTION (TYP.) APPROXIMATE ELEVATION -2.0 LINE OF REEF BALLS AT APPROXIMATE ELEVATION -2.0 BY SUPPLEMENTAL SPARTINA PLANTINGS TO INCREASE MARSH FUNCTION (TYP.) LINE OF REEF BALLS AT APPROXIMATE ELEVATION -1.0 DATE LINE OF REEF BALLS AT APPROXIMATE ELEVATION -1.0 DESCRIPTION LIVING SHORELINE RESTORATION AND REEF BALL PLACEMENT PLAN (SCALE: 1"=60') A Framework for Coastal Resilience LONG WHARF LIVING SHORELINE/REEF BALL PROJECT REGIONAL FRAMEWORK FOR COASTAL RESILIENCE IN SOUTHERN CONNECTICUT Reducing coastal vulnerability NEW HAVEN, CONNECTICUT through local collaboration & DM SRS DM DESIGNED DRAWN CHECKED 1"=60' natural systems. Credit: Milone and MacBroom SCALE JUNE 6, 2016 DATE Long Island Sound is a key contributor to quality of life in Connecticut and 2733-14 PROJECT NO. EXISTING VIEW This Regional Partnership PROPOSEDprovides ecological, social LIVING and economic benefitsSHORELINE to residents throughout AND the 1 1 1 OF 1 (NOT TO SCALE) is between: REEFstate. SomeBALL of the largestPLACEMENT population centers in Southern PERSPECTIVE Connecticut are in SHEET NO. The Towns of close proximity to the shoreline and vulnerable to extreme weather, sea level (NOT TO SCALE) Branford, Fairfield, rise, flooding and coastal erosion. Recent storms, such as Hurricane Irene and Super Storm Sandy have underscored this vulnerability. Less dramatic PR-1 Guilford, Madison & but equally devastating is the continual beach erosion and sea level rise that SHEET NAME Copyright Milone & MacBroom, Inc - 2016 Stratford. threaten the coastline. The Cities of Bridgeport, Extreme weather and other natural hazards are not controlled by political Milford, East Haven, boundaries. By approaching coastal resilience regionally, communities can New Haven & focus on projects which are complementary to and support the strategies of West Haven neighboring municipalities. Through the Regional Framework for Coastal Resilience in Southern Con- As well as: necticut, opportunities to naturally reduce risk and increase resilience will be identified. The opportunities will be comprehensively assessed and prioritized based on their benefits to the local community and their overall contribution to reducing vulnerabilities in Southern Connecticut. Over 590,000 residents live in the ten coastal municipalities that are partners in the Regional Framework for Coastal Resilience. Increasing the viability of natural ecosystems along this significant portion of Connecticut’s coastline (approximately 30%) will protect the integrity of Long Island Sound and coast- al ecosystems. Concepts identified through this partnership can be found on the next two pages. TO MINIMIZE CHANNEL FLOW AT JOINT, ANGLE ENDS OF COIR ROLLS UPHILL SO THAT TOP OF ROLL MEETS RIPRAP AT SAME ELEVATION PROVIDE ADDITIONAL STONE RIPRAP AND GEOGRID ON EAST SIDE OF 1 0' 30' 60' SWALE TO MATCH EXISTING PR-1 SWALE 0 1/2" 1" GRATED SCALE 1" = 60' SURFACE INLET CONTINUE FIBER ROLLS SHRUB MASSES (TYP.) Swale TO EXTENT OF CUT BANK INCLUDING HIGH BUSH BLUEBERRY, NORTHERN BAYBERRY AND GROUNDSEL BUSH Conc. Headwall Grass UICO 1845 15" RCP TO MINIMIZE CHANNEL FLOW AT JOINT, INV.=9.85 Benchmark Bench Tie in Utility Pole SUMMARY ELEMENTS ANGLE ENDS OF COIR ROLLS UPHILL Conc. Swale FAIRFIELD BEACH ROAD Elev.=20.42 SO THAT TOP OF ROLL MEETS RIPRAP · THIS SEGMENT OF THE SHORELINE IS A PATHWAY FOR STORM SURGES TO REACH THE COASTAL FLOODPLAINAT SAME ELEVATION Riprap GRATED · THE FAIRFIELD FLOOD AND EROSION CONTROL BOARD CONSIDERS THIS IS A PRIORITY AREA FOR MITIGATION 0' 40' 80' INCORPORATE SURFACE INLET · PRIVATE SEAWALLS ARE AT ELEVATION 8 TO 10 FEET Riprap GEOTEXTILE EARTHERN BERM · THE FEMA BASE FLOOD ELEVATION IS 13 (VE) 0 1/2" 1" GRATED ROWLAND ROAD · THE NACCS-CALCULATED STORM LEVELS ARE 10.5 TO 11.5 FEET IN BELOW ENDS THE 50 TO 100-YEAR RI RANGE SURFACE INLET · OF COIR ROLLS VEGETATE BACK OF DUNE WITH: BACK OF DUNE RIDGE TO MEET PRIVATE WALLS CREATION OF A DUNE RIDGE AT ELEVATION 12 FEET WOULD PROVIDE INCREASED PROTECTION AND UNDER · Bayberry (Myrica pennsylvanica) AT ELEVATION 8 TO 10 FEET(APPROX.) Grass · THE ELEVATION 12 FEET IS SUFFICIENTLY LOW TO AVOID NEW RIPRAP · Beach Plum (Prunus maritima) OBSTRUCTING VIEWS · Seaside Goldenrod (Solidago sempervirens) EARTHERN BERM · A DUNE RIDGE WOULD INTRODUCE VEGETATION TO THIS BEACH STONE · Switchgrass (Panicum virgatum) · THE BEACH WIDTH MUST BE INCREASED TO ACCOMMODATE THE DUNE RIDGE VEGETATE FRONT OF DUNE WITH: Wrack Line (Typ.) · WITH SEA LEVEL RISE OF ONE FOOT, THE DUNE RIDGE SHOULD TOP OF DUNE EL. · Beachgrass (Ammophila breviligulata) STILL PROVIDE SIGNIFICANT PROTECTION Conc. Headwall 12.0 (NAVD88) · Saltmeadow Cordgrass (Spartina patens) Long Island Sound Ò SEE INSET 1 TOP OF DUNE EL. 12.0 (NAVD88) TOP OF DUNE EL. 12.0 (NAVD88) www.miloneandmacbroom.com 99 Realty Drive Cheshire, Connecticut 06410 (203) 271-1773 Fax 272-9733 EARTHERN BERM SUMMARY ELEMENTS SHOAL POINT INCORPORATE GEOTEXTILE BELOW ENDS · THIS SEGMENT OF THE SHORELINE IS A SHINING EXAMPLE OF OF COIR ROLLS TO STRENGTHEN JOINT COASTAL PUBLIC ACCESS · LOW DUNES AND PATCHES OF VEGETATION ARE FOUND AMONG VEGETATE BACK OF DUNE WITH: 0 BETWEEN EARTH, COIR, AND STONE WIDE SANDY EXPANSES 0' 50' 100' www.miloneandmacbroom.com · Bayberry (Myrica99 Realty Drive pennsylvanica)Cheshire, Connecticut 06410 (203) 271-1773 Fax 272-9733 · THE CITY OF WEST HAVEN CONSIDERS THIS IS A PRIORITY AREA · FOR FLOOD PROTECTION 0 1/2" 1" 0 Beach Plum (Prunus maritima) · THE FEMA BASE FLOOD ELEVATION IS 12 (VE) 0 · Seaside Goldenrod (Solidago sempervirens) · NORTH END OF DUNE RIDGE TO TIE INTO · Switchgrass (Panicum virgatum) THE NACCS-CALCULATED STORM LEVELS ARE 10.3 TO 11.4 FEET IN SOUTH END OF DUNE RIDGE TO TIE INTO THE 50 TO 100-YEAR RI RANGE PROVIDE ANGLED PATHWAYS OVER DUNE TO SEEFUTURE INSET PROJECT 2 AT PENFIELD BEACH · CREATION OF A DUNE RIDGE AT ELEVATION 13 FEET WOULD FUTURE FLOOD PROTECTION SYSTEM OR END BEACH IN EXISTING LOCATIONS (TYP.) Project LocationsVEGETATE FRONT OF &DUNE WITH: InformationPROVIDE INCREASED PROTECTION IN FAVOR OF OTHER MITIGATION METHODS · Beachgrass BY (Ammophila breviligulata) · A DUNE RIDGE WOULD INCREASE THE DENSITY AND TYPES OF NORTH END OF BEACH TO TIE INTO FUTURE VEGETATION AT THIS BEACH · Saltmeadow Cordgrass (Spartina patens) TIE GRADES INTOBY EXISTING EXTEND WALK THROUGH DUNE (TYP.) ENGINEERED BEACH AT PENFIELD · THE BEACH WIDTH MUST BE INCREASED IN SOME PLACES TO Swale RETAINING WALL (TYP.) ACCOMMODATE THE DUNE RIDGE ALTSCHULER PLAZA ALTSCHULER DATE · WITH SEA LEVEL RISE OF ONE FOOT, THE DUNE RIDGE SHOULD WOODLAND TO REMAIN STILL PROVIDE SIGNIFICANT PROTECTION PROVIDE ADDITIONAL STONE WASHINGTON AVE. TOP OF DUNE TOP OF DUNE TOP OF DUNE Ò RIPRAP AND GEOGRID ON LONG ISLAND SOUND ELEVATION 13.0 ELEVATION 13.0 ELEVATION 13.0 EAST SIDE OF SWALE TO 1 DATE MATCH EXISTING SWALE TO MINIMIZE CHANNEL FLOW AT JOINT, ANGLE West Haven BEACH ST. ENDS OF COIR ROLLS Stratford DESCRIPTION UPHILLCONCEPTUAL SO THAT TOP OF BEACH NOURISHMENT/ DUNE CREATION PLAN ROLL MEETS RIPRAP AT (SCALE: 1"=80') Beach Nourishment & SAME ELEVATION Conc. Headwall Conc. Headwall Russian Beach www.miloneandmacbroom.com Dune Creation 99 Realty Drive Cheshire, Connecticut 06410 (203) 271-1773 Fax 272-9733 Bank Protection DESCRIPTION PROJECT END POINT - T.B.D. TIE GRADES INTO EXISTING GRADES - PROJECT END POINT T.B.D. CONSIDER INCORPORATING PAVILIONWest Haven’s 3+ miles of public beach BY TO MINIMIZE The coastal bank at Rus- WALL INTO FLOOD PROTECTION SYSTEM CHANNEL FLOW 1 AT JOINT, ANGLE DATE LONG ISLAND SOUND are a vital asset to the City. A dune ridge INCORPORATE ENDS OF COIR sian Beach is experienc- 15" RCP GEOTEXTILE ROLLS UPHILL SO INV.=9.85 BELOW THAT TOP OF ENDS OF ROLL MEETS would provide increased protection from COIR RIPRAP AT SAME ing severeCONCEPTUAL erosion BEACHand NOURISHMENT/ DUNE CREATION PLAN DESCRIPTION ROLLS AND ELEVATION (SCALE: 1"=100') UNDER INCORPORATE GEOTEXTILE flooding and increase the density and BELOW ENDS OF COIR ROLLS there is limited protection Conc. Swale NEW RIPRAP TO STRENGTHEN JOINT STONE BETWEEN EARTH, COIR, AND types of vegetation at the beach. STONE in place. A bioengineered bank design would miti- 1 PART PLAN 2 PART PLAN gate the ongoing erosion - WEST END 0 20 40 - EAST END 0 20 40 EXISTING PERSPECTIVE SCALE: 1" = 20' SCALE: 1" = 20' andNOT protect TO SCALE waterfront PENFIELD TO SHOAL POINT BEACH NOURISHMENT AND DUNE CREATION REGIONAL FRAMEWORK FOR COASTAL RESILIENCE IN SOUTHERN CONNECTICUT FAIRFIELD, CONNECTICUT homes. JCW SRS DM DESIGNED DRAWN CHECKED INSET A: EARTHERN BERM 1"=80' SUMMARY ELEMENTS: DUCKBILL ANCHORS W/ 10' SCALE SHRUBS CABLES INSTALLED OVER Milone & MacBroom JUNE 6, 2016 · THE EGAN CENTER IS AN IMPORTANT COMMUNITY ASSET DATE · A SMALL TIDAL CREEK WAS LONG AGO PLACED IN A CULVERT 0' 10' 20' AND UNDER AS SHOWN. BENEATH THE SITE 2733-14 · DAYLIGHTING THE STREAM WOULD PROVIDE OPPORTUNITIES TO 0 1/2" 1" PROJECT NO. RESTORE TIDAL AND NON-TIDAL WETLAND VEGETATION · EXIST. LAWN 1 OF 1 A RAIN GARDEN MAY BE INCORPORATED INTO THE PROJECT TO CUT AND RESURFACE SHEET NO.
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