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St. Mary's City Gapped Sill

Created by Scott Hardaway on Jan 08, 2015  
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General
Construction Dates: 
Estimated
2002
St. Mary's City , MD
United States
38° 10' 45.858" N, 76° 26' 0.9024" W
Maryland US
Pre-Project Conditions
Submerged Aquatic Vegetation (SAVs) present?: 
No
Pre-Construction Erosion Present?: 
Yes
Pre-Construction Erosion at Adjacent Parcels?: 
Yes
Existing Structures or Debris?: 
Yes
Describe Existing Structures or Debris at the Site: 
Bulkhead
Environmental Considerations
Name of Waterbody: 
St. Mary's River
Site Classification: 
Cove
Shoreline orientation relative to max. fetch distance: 
15 Degrees
Tidal Range: 
1.2 feet
Adjacent to Navigation Channel?: 
No
Project Site Within a Designated No-Wake Zone?: 
No
Salinity: 
Brackish: 0.5 – 30 ppt
Design Considerations
Was fill brought in?: 
Yes
Type of Fill: 
Sand
Source of Fill: 
Upland
Length of Project: 
2,050 feet
Average Project Width: 
30 feet
Structural Elements
Did the project involve a structure?: 
Yes
Type of Structure: 
rubble-mound sill
Describe construction materials: 
300-900 lbs rock
Height of Structure Above MHW: 
1.0 foot
Drop downs, or openings or overlaps?: 
Yes
Non-Structural Elements
Primary Wetland species below MHW: 
Spartina alterniflora (smooth cordgrass)
Primary wetland species above MHW: 
Spartina patens (saltmeadow cordgrass)
Project Performance
Overall performance of Living Shoreline for erosion protection?: 
High
Overall performance of the structure and vegetation?: 
High
Storm Exposure: 
Yes
Storm Date: 
Thursday, September 18, 2003
Storm Intensity: 
High
Describe Project Storm Performance: 
minimal base of bank scarping
Additional Information