August 2016 Flood Preliminary Report Amite River Basin Prepared for Amite River Basin Drainage and Water Conservation District Prepared by Bob Jacobsen PE, LLC August 21, 2017 Bob Jacobsen PE, LLC 7504 Menlo Drive Baton Rouge, Louisiana 70808 225.678.2414
[email protected] August 21, 2017 Mr. Dietmar Rietschier Executive Director Amite River Basin Drainage and Water Conservation District 3535 S. Sherwood Forest Blvd. Suite 135 Baton Rouge, Louisiana 70816 Subject: August 2016 Flood Preliminary Report, Amite River Basin Dear Mr. Rietschier: Per the Contract for Professional Services (dated May 17, 2017) with the Amite River Basin Drainage and Water Conservation District (ARBD) Bob Jacobsen PE, LLC has completed an August 2016 Flood Preliminary Report. The attached Report includes four parts: Part I. Background—The Amite River Basin. Part II. Background—Flood Hazard and Risk in the Amite River Basin. Part III. The August 2016 Flood. Part IV. Conclusions and Recommendations. Part III includes information on the ARBD High Water Mark (HWM) program (and USGS gauge and HWM programs), analysis of peak flood data quality, and Preliminary Peak Flood Profiles for 70 streams within the eight sub-basins of the Amite River Basin: Upper Amite River Honey Cut Bayou/Jones Creek/Clay Cut Bayou Middle Amite River Grays & Colyell Creeks Lower Amite River Bayou Manchac Comite River Blind River Part IV includes key findings and conclusions based on the preliminary profiles, together with recommendations for finalizing the profiles and preparing a basin-wide inundation map using a high quality hindcast model. In addition, Part IV includes recommendations regarding Full Spectrum flood hazard and Real Flood Risk analyses.