ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS
The existing Federal project through the Gastineau Channel, Alaska, provides for a navigation channel 4 ft deep at mllw including overdepth dredging with a bottom width of 75 ft. The channel was constructed in 1959-60 through an area with a prevailing bottom elevation of 10 to 15 ft mllw and soon experienced rapid shoaling at several locations. No maintenance dredging has been performed, primarily because of the large cost of moving a dredge to this remote area. A model study was conducted to determine the best means of resolving the shoaling problem. The model, constructed to linear scale ratios of 1500 horizontally and 1100 vertically, reproduced about 7 miles of Gastineau Channel from Fritz Cove on the west to 1 mile north of Juneau, Alaska, on the east. It was equipped to reproduce and study prototype tides, tidal currents, freshwater inflow, and shoaling.