Use Old River Control Complex for Flood Control MRC PRESENTATION - PowerPoint PPT Presentation

Use Old River Control Complex for Flood Control MRC PRESENTATION APRIL 7, 2017

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ORCC: Capacity & Crest at Baton 2 Rouge Corps Model of 2016 MS 2016 MS River Flood River Flood 75% Capacity for a week / cut 100% Capacity for 3 weeks • • while still above flood stage 34.7 ft. Crest (8.3 ft. lower ) • 43 ft. Crest • Conclusion: ORCC can reduce the height and duration of floods.

Baton Rouge Gage 1950-2016 # of days above 30’ and 35’ per year 3 160 140 More frequent and longer floods above 120 flood stage 100 Number of Days (#) Days Above Batture 30’ Flood 80 Stage 60 40 Days Above 35’ Flood Stage 20 0

Baton Rouge River Gage Stage Trends1950 -2016 4 50.0 45.0 max stage 40.0 flood stage 35’ 35.0 batture flood stage 30’ 30.0 River Stage (ft) 25.0 ave stage Flood Days/ Flood 20.0 Days Year Years 1950-72 75 3.3 2/23 9% 15.0 1973-2016 1061 24.1 29/44 66% 10.0 2007-16 253 25.3 7/10 70% 5.0 0.0

5 5 Atchafalaya Outlet Ø Shorter Ø Steeper Ø Faster Ø Flood Easements

Use ORCC To Prevent & Relieve 6 Floods u FCA 1954 – outdated / time to change u Increase the Mississippi’s discharge u Stop the rising river u Relieve major floods u Reduce batture flooding u Safer, better and fairer

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