Sandstone Bluff
Rock Armor (Riprap)
Active Beach berm
Mean High Tide
Reflected Wave Energy
Total Project Budget
$487,500
$3,250 / linear ft
Annual Maintenance
$19,500
4.0% armoring restock / yr
Structural Lifespan
22 yrs
Before catastrophic toe scour
Downcoast Sand Deficit
1,420 sq ft
Sediment starved per tidal cycle
Wave Energy Reflected
71%
Passive beach scouring factor
Regulatory Clearance
High (ESHA)
CCC Chapter 3 compliance
Coastal Dynamics Brief: Constructing 150 linear feet of heavy rock revetment (6.5-ton armor stones) on an 8.0% beach slope arrests immediate bluff toe retreat for private residences. However, hard armoring creates intense wave reflection (71%), preventing natural cliff degradation and depriving the public littoral cell of approximately 1,420 sq ft of beach replenishment downcoast.
Engineering Specifications
Configure coastal armor dimensions to compute structural stability and environmental mitigation costs.
150 ft
6.5 tons
8.5 ft
0.08 (8.0%)
Deterministic Audit Telemetry
Cost per Foot: $3,250
Total Cost: $487,500
Annual Maint: $19,500
Sand Loss: 1420 sq ft
Lifespan: 22 yrs
Permit Risk: High (Environmentally Sensitive Habitat)