Colin A. Niehus

• Appraisal of the water resources of the Big Sioux aquifer, Lincoln and Union Counties, South Dakota
• Characterization of stormwater runoff in Sioux Falls, South Dakota, 1995-96
• Estimation of flood flows on the Big Sioux River between Akron, Iowa, and North Sioux City, South Dakota
• Estimation of ice thickness and strength for determination of lateral ice loads on bridge substructures in South Dakota
• Evaluation of factors affecting ice forces at selected bridges in South Dakota
• Lake-level frequency analysis for the Waubay Lakes Chain, northeastern South Dakota
• Scour assessments and sediment-transport simulation for selected bridge sites in South Dakota
• Summary of water-resources data within the Little White River Basin, South Dakota and Nebraska
• Supplement to Water-resources investigations report 99-4122, Lake-level frequency analysis for the Waubay Lakes Chain, northeastern South Dakota
• Water resources of Lincoln and Union counties, South Dakota