NYLON MAT WITH BALLAST 



Revetment mattress, Allegheny Reservoir, N.Y. 



Prototype Installation : 



Allegheny Reservoir, New York. 



Concrete-filled nylon mat (Fabriform) was placed on a 1 on 2 slope. 



Slope length was 53 feet (Wilder and Roller, 1971). 



Magdalene River, Columbia. 



Nylon tubes 5.3 feet wide and 100 feet long were sewn together and 



filled with sand-asphalt mixture (Van Lookeren Compagne, 1963). 



Netherlands . 



Woven fabric with sewn on pockets filled with rock or rubble to provide 

 ballast to keep fabric in position. Used as slope or toe protection 

 (The Dock and Harbor Authority, 1974). 



Wave Tank Tests : 



Unknown . 



Design Factors : 



Zero-damage wave height: Depends on mat strength. 



Wave runup: 0.8 to 1 compared to smooth slope (estimated). 



Wave reflection: High (estimated). 



Remarks : 



Concrete-filled mat will crack and break under differential settlement. 



Mats could be damaged by drifting debris. 



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