Use Old River Control Complex for Flood Control

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

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ORCC: Capacity & Crest at Baton Rouge Corps Model of 2016 MS River Flood • • 75% Capacity for a week / cut while still above flood stage • 100% Capacity for 3 weeks • 34. 7 ft. Crest (8. 3 ft. lower ) 43 ft. Crest Conclusion: ORCC can reduce the height and duration of floods. 2

Baton Rouge Gage 1950 -2016 # of days above 30’ and 35’ per year 160 3 140 More frequent and longer floods above flood stage 100 Days Above Batture 30’ Flood Stage 80 60 40 Days Above 35’ Flood Stage 20 64 19 66 19 68 19 70 19 72 19 74 19 76 19 78 19 80 19 82 19 84 19 86 19 88 19 90 19 92 19 94 19 96 19 98 20 00 20 02 20 04 20 06 20 08 20 10 20 12 20 14 20 16 62 19 60 19 58 19 56 19 54 19 52 19 19 50 0 19 Number of Days (#) 120

Baton Rouge River Gage Stage Trends 1950 -2016 4 50, 0 45, 0 max stage 40, 0 30, 0 25, 0 flood stage 35’ batture flood stage 30’ ave stage 20, 0 Flood Days/ Year Flood Years 75 3. 3 2/23 9% 15, 0 1950 -72 10, 0 1973 -2016 1061 24. 1 29/44 66% 2007 -16 253 25. 3 7/10 70% 5, 0 5 19 2 5 19 4 5 19 6 5 19 8 6 19 0 6 19 2 6 19 4 6 19 6 6 19 8 7 19 0 7 19 2 7 19 4 7 19 6 7 19 8 8 19 0 8 19 2 8 19 4 8 19 6 8 19 8 9 19 0 9 19 2 9 19 4 9 19 6 9 20 8 0 20 0 0 20 2 0 20 4 0 20 6 0 20 8 1 20 0 1 20 2 14 0, 0 19 River Stage (ft) 35, 0

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

Use ORCC To Prevent & Relieve Floods FCA 1954 – outdated / time to change Increase the Mississippi’s discharge Stop the rising river Relieve major floods Reduce batture flooding Safer, better and fairer 6

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