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Cape st claire technical memo final draft with figures
Biohabitats evaluated 7 shoreline sites in Cape St. Claire, Maryland for ecological restoration and enhancement projects. They developed conceptual plans for each site, focusing on reducing erosion and improving habitat. For the main beach (Site 1), they initially proposed a hybrid design with floating oyster cages and reef balls to attenuate waves, but after community feedback, developed an alternative using a rock breakwater and groins. They presented both concepts to regulators, who recommended the rock revetment design as easier to permit. Overall, the report assessed conditions at each site and provided high-level restoration approaches.
Cape st claire technical memo final draft with figures
- 1. TECHNICAL MEMORANDUM Date: February1, 2017 To: Beau Breeden, President CSCIA, and CSCIA Board Members From: Joe Berg/ Ed Morgereth, Biohabitats, Inc. RE: Cape St. Claire Capital Improvement Projects for Beaches and Parks Biohabitats Project No. 16013.01 Subject: Shoreline Enhancement and Restoration Planning for Seven Sites Introduction Cape St. Claire is an unincorporated community in Anne Arundel County, Maryland. The population of the community was approximately 7,000 people in the 2010 census. Cape St. Claire is bounded to the east by the Little Magothy River, to the north by the Magothy River, to the west by Deep Creek, and to the south by College Parkway. U.S. Route 50 runs to the south of the community, leading west 7 miles (11 km) to Annapolis and east 3 miles (5 km) to the Chesapeake Bay Bridge. The community has a total area of 2.5 square miles (6.5 km2 ), of which 2.0 square miles (5.2 km2 ) is land and 0.54 square miles (1.4 km2 ) or 20.72%, is water. The area that was to become Cape St. Claire was mostly farmland until the 1940s. The River Bay Company platted the community of Cape St. Claire on June 14, 1949. The community was envisioned and sold as a summer retreat for residents of Washington, D.C. and Baltimore. In April 1989 the Anne Arundel County Council approved the formation of the Cape St. Claire Special Community Benefits District (SCBD). The SCBD allows the community to establish a taxing district. The taxes are collected by the county government (as part of property tax) and are then turned over to the Cape St. Claire Improvement Association (CSCIA) to administer as voted on by the property owners in the community. This special benefits district has allowed the community to purchase additional common property, build a specially‐designated fishing/crabbing pier, make improvements to community assets, and hire off‐duty county police for additional security.
- 2. Statement of purpose: Reduce the degradation of the beach, improve ecological conditions at Lake Claire, and improve conditions in significant natural areas around the community Summary of what was completed: Biohabitats evaluated 7 sites and developed generalized action plans for each. Biohabitats then presented this information to the community in a public meeting, revised the approach for Site 1 (Public Beach) based on feedback, and then scheduled and participated in a pre‐application site visit with the Maryland Department of the Environment, Tidal Wetlands Division, and Maryland Department of Natural Resources support staff. Approach The Cape St Claire Board proposed seven sites for consideration as potential ecological restoration and enhancement sites (Figure 1 – Overview Map). The following provides descriptions of these sites. Site 1. The initial concept for Main Beach was a hybrid beach protection design developed by community members. This included a 4‐6 acre area of floating oyster cages intended to attenuate waves before the waves reached the beach. In addition, an array of oyster Reef Balls™ beachward of the floating oyster wave attenuator would further work to reduce wave energy before it reaches the beach. In addition to the physical barriers to wave energy, both the floating oyster cages and the submerged oyster Reef Balls™ have additional benefits, including: oyster production with potential financial benefit to the community, oyster filtering which provides improved water quality, growth of aquatic life on the submerged oyster Reef Balls™, increased aquatic resources, and increased sedimentation off the main beach which would further reduce wave energy and increase beach protection year after year, assuming these measures stayed in place. After the public presentation of this approach and based on community feedback, the Board decided to go in another direction. The feedback included a concern that the suggested approach did not have the engineering certainty of a rock breakwater and groin approach. No one had been identified to manage maintenance of the floating oyster system, and there were concerns the anchoring system would fail during large storms for which maintenance and repair are beyond the community’s capacity. It was noted that a breakwater would be more attractive to homeowners facing the beachfront, with concerns that the oyster structures and oyster cages would be an attractive nuisance (e.g. a potential hazard to swimmers). As a result Biohabitats developed an alternative concept (Figure 2 – Site 1 Main Beach) which incorporates a rock breakwater and groins. This is the approach the community plans to move forward with. Site 2. Lake Claire is located along a stretch of beach, as well as a riparian area and marsh near the Lake Claire outlet at the Magothy River. It is an area that has experienced erosion and beach changes, with depositional shoaling beyond the outlet. The site also hosts invasive species along the riparian area, including common reed or ‘phragmites’ (Phragmites australis). This is not an area that would benefit
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- 6. Site #3 Deep Creek Site#2 Lake Claire Site #1 Main Beach Site #5 Little Magothy Pier Site #7 Park Circle Site #4 Little Magothy Park Site #6 Little Magothy Pumping Station MASHIE CT COLLEGE PKWY PINE VALLEY DR HAMPTONRD CAPESAINTCLAIRERD HARBOR VIEW TER FOXPAW TRL C R ANES RO OST CT MOUNT ALBAN DR DEEP CREEK VW DIETRICH WAY BAYHEAD RD HAZELNUTCT STONEHURST DR FAIRWINDS DR FAWNS WALK PENNINGTONLN SKYVIEW DR CORAL CT PENNINGTONLN S BROADNECK RD BLUE RIDGE DR SUNWOODTER RIDGEWAY DR WOODS LANDING DR HILLTOPDR COLONIALMANORCT C O LLEGE PKWY W HARF RD HILLTOPDR DARLOWPL BRO ADVIEW D R MOUNTAIN TOP DR SKYWAY DR CRESTVIEW DR SUN VALLEY DR S POON CT WESTWAY MAN O WAR CT SNOW GOOSE LN SOUTHVIEWDR GLENWOODDL BAYVIEWVIS SEABRIGHT DR GREENW AY DR PEACH CT LAKEVIEW LN AQUA CT FOREST TER SKYVIEW DR SWAN DR VAN CAMP CT SKYW AY DR LONGPOINTTERSAINT CATHERINE DR CHESTNUT TREE DR HARM O NY LN BREEZEWAYDR ROUND TOP DR BARRACUDA COVE CT MORGAN DR PINTAILLN MAGO THY CIR WALNUTRIDGEDR PARK CIRCLE DR TANOOK CT BLUE RIDGEPL SEAHORSE CT PINE TREE DR LOCUSTTREEDR BENNE TT R D IDYLEW ILD DR SPRUCETREELN M ASTERDERBYCT FAIRWAY DR HILLCREST DR BROADMOOR DR SUNWOOD LN LANDO N LN SAINTCHARLESDR MOUNT HOLLY DR DOGWOOD TREE DR HIGHPOINT DR SAINT JOHNS DR M ID DLETOWNRD POPLAR TREE DR WO O DDUCKLN PINEHILLDR DEEP CREEK AVE PLATEAUPL SHADYSIDE CT RIVERVIEW DR OAK TREE LN SAMANTHA CT HILLTOP RD BAY HEAD RD LINDEN TREE DR LIDO DR CHESTNUT TREE DR MAGOTHY PARK LN BENSON LN SHORE ACRES RD HARMONY LN HOPKINS RD BELLERIVE RD BELLERIVERD ROLLING VIEW DR WOODLAND CIR HIGHVIEWDR SECRETARIATDR GREENHOLLYDR SAINT MARGARETS DR SAINTGEORGEDR WINTERGULL L N DARLOW DR ARUNDEL DR SUMMITDR SUMMITDR ALMOND DR NEPTUNEPL MARIN E DR MARINEDR BROADNECK PARK RD PH ILLIPS D R MERMAIDDR GATEWAYDR RAMBLEWOODDR LATROBEDR LATROBEDR SUMMITDR POPLARHILLDR LAKE CLAIRE DR HILLENDALE DR LITTLEMAGOTHYVW LITTLE MAGOTHY VW WINDGATE DR W IN D G ATE DR RIVER BAY RD RIVER BAY R D ROSE BAY CT QUAKER RIDG E CT MOUNTPLEASANTDR TREMONT CIR OLDCAPESAINTCLAIRERD BAY STONECT STO NEHURST CT WINDSORRIDGELN DESTINY C IR DESTINY CIR F November 2016 Cape St. Claire Legend Streams Sites Open Water Cape St. Claire Boundary Parks Buildings Parcels Data Source: Anne Arundel County 0 400 800 Feet Figure 1 Cape St. Claire Shoreline Improvement Plan Locations Annapolis, MD
- 7. Rock/Reef Structures Breakwater Beach Replenishment Repaired or RelocatedGroins Potential New Groin Potential New Groin BAY HEAD RD BROADVIEW DR SAINT CATHERINE DR RIV ER BAY RD RIVER BAY RD 20 18 16 14 12 10 8 6 4 2 6 4 2 4 2 18 18 16 16 16 8 6 6 6 2 4 2 2 16 12 2 2 F November 2016 Cape St. Claire Legend Potential New Groin Repaired Jetty Structures Streams Contours Breakwater Phragmites Control Sites Parks Buildings Data Source: Anne Arundel County 2014 Aerial Imagery 0 50 100 Feet Annapolis, MD Anne Arundel County Figure 2 Site #1 Main Beach
- 8. Phragmites Control Living Shoreline Beach Replenishment LATROBEDR RIVER BAY RD LAKE CLAIRE DR 24 22 20 18 16 14 12 10 8 6 4 2 14 12 10 18 16 8 6 12 10 8 6 22 20 4 2 16 14 6 4 4 2 24 24 20 18 16 14 12 4 4 4 4 4 4 2 4 2 2 2 2 F November2016 Cape St. Claire Legend Streams Contours Sites Beach Replenishment Phragmites Control Living Shoreline Parks Buildings Parcels Data Source: Anne Arundel County 2014 Aerial Imagery 0 50 100 Feet Annapolis, MD Anne Arundel County Figure 3 Site #2 Lake Claire
- 9. Future Road Stormwater Runoff BMP HARBOR VIEW TER GREEN HOLLY CT RAM BLEW OOD DR ANGLERS W AY IDYLEW ILD DR GREEN HOLLY DR GREENHOLLYDR ROLLINGVIEW DR ROLLING VIEW DR MA RINERS CIR GATEWAYDR GATEWAYDR 80 76 74 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 96 94 92 90 86 84 82 78 4 2 72 70 28 26 24 22 20 18 16 12 14108 6 4 40 38 36 34 32 30 28 2624 22 20 20 18 16 14 6 12 82 7472 70 68 66 64 62 60 52 50 48 46 44 42 40 100 98 102 100 42 40 88 20 18 16 14 12 10 8 6 18 10 4 54 102 102 56 54 54 48 46 40 40 38 3230 16 F November 2016 Cape St. Claire Legend Streams Contours Sites Future BMP Living Shoreline Parks Buildings Parcels Data Source: Anne Arundel County 2014 Aerial Imagery 0 50 100 Feet Annapolis, MD Anne Arundel County Figure 4 Site #3 Deep Creek
- 10. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Phragmites Suppression & Living Shoreline CountyRSC Phragmites Suppression Living Shoreline MAGOTHY CIR MAGOTHY PARK LN LITTLEMAGOTHY V W LITTLE MAGOTHY VW Site #4 Little Magothy Park Site #6 Little Magothy Pump Station 18 16 6 4 2 14 12 10 26 24 22 20 22 20 18 16 14 12 10 8 30 28 18 16 16 14 4 2 8 26 28 20 18 18 18 18 18 16 1616 14 14 14 14 14 14 14 12 2 F November 2016 Cape St. Claire Legend Streams Contours %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Stormwater Swale by others Sites Living Shoreline & Beach Replenishment Phragmites Control & Living Shoreline Regenerative Conveyance - Wetland BMP Parks Buildings Parcels Data Source: Anne Arundel County 2014 Aerial Imagery 0 50 100 Feet Annapolis, MD Figure 5 Site #4 & #6 Little Magothy Park & Little Magothy Pump Station
- 11. Phragmites Control & Living Shoreline SKYWAY DR RIVER BAY RD SWANDR 14 12 10 16 4 6 2 10 8 12 8 8 6 F November2016 Cape Saint Claire Legend Streams Contours Sites Phragmites Control Parks Buildings Parcels Data Source: Anne Arundel County 0 25 50 Feet Annapolis, MD Anne Arundel County Figure 6 Site #5 Little Magothy Pier
- 12. Living Shoreline Stream Restoration CAPESAINTCLAIRERD SWAN DR DIETRICH WAY SKYVIEW DR BRICE TER MOUNTAIN TOPDR SAINTCHARLESDR PARK CIRCLE DR BAYVIEWVIS LITTLE MAGOTHY VW F November 2016 Cape Saint Claire Legend Streams Sites Phragmites Control Stream Restoration Living Shoreline Parks Buildings Parcels Data Source: Anne Arundel County 0 50 100 Feet Figure 7 Site #7 Park Circle Annapolis, MD Anne Arundel County
- 13. F July 2016 Cape St. Claire Legend DataSource: Anne Arundel County 0 400 800 Feet Cape St. Claire Shoreline Improvement Plan Locations Annapolis, MD Section Details November 2016 Not to Scale Figure 8 Cape St. Claire Shoreline Improvement Annapolis, MD
- 14. F July 2016 Cape St. Claire Legend DataSource: Anne Arundel County 0 400 800 Feet Cape St. Claire Shoreline Improvement Plan Locations Annapolis, MD PLANT COMMUNITIES Low Marsh High Marsh Coastal Scrub-Shrub RSC/ Wetland BMP Stream Restoration Section Detail & Plant Palette Living Shoreline November 2016 Not to Scale Figure 9 Cape St. Claire Shoreline Improvement Annapolis, MD