Steamboat Rock Dam
a river restoration project
Prepared by Paul Speed, P.E.
LT Leon Associates prepared a hydraulic model of the Iowa River using the United States Army Corps of Engineers hydraulic modeling program, HEC-RAS. The model includes the Steamboat Rock dam, downstream bridges, and land and bathymetric (underwater) survey data near the dam. The model was analyzed for multiple rainfall scenarios including high probability rainfall events (2-Year and 5-Year rainfall events) and low probability rainfall events (100-Year rainfall event). The existing conditions scenario was evaluated along with multiple scenarios that lowered the height of the existing dam incrementally including a full removal scenario. Refer to the graphic below for approximate flood elevations within the Pine Ridge Park campground.
Key observations from the hydraulic analysis include: