The results of three hydraulic model tests to evaluate the stability
of a placed stone breakwater are presented and discussed. The prototype
breakwater was designed to protect offshore power and port facilities in
60 feet of water and was tested at scale ratios of 1:10, 1:20, and 1:100.
The armor layer tested is formed from quarried stones of irregular parallelepiped
shapes, individually placed long axis perpendicular to the plane
of the surface. The resultant breakwater is relatively smooth, densely
packed and very stable. Stability, runup, rundown, and reflection are
evaluated for a variety of water depth, wave height, and periods. Analysis
of the damage induced in the models shows that the placed stone armor is
approximately as stable as Bolos. Runup, rundown, and reflection response
is similar to rough impermeable slopes. Comparison of large and small
scale results demonstrate that relative increases in drag forces at lower
Reynolds numbers decrease stability and runup in small scale models
