Transcript Comite River Diversion Canal Project Regional Flood Awareness Workshop December 3, 2009

Comite River Diversion Canal Project
Regional Flood Awareness Workshop
December 3, 2009
Amite River Basin
COMITE RIVER DIVERSION CANAL PROJECT
U.S. ARMYCORPS OF ENGINEERS
LOUISIANA DEPARTMENT OF TRANSPORTATION AND DEVELOPMENT
AMITE RIVER DRAINAGE AND WATER CONSERVATION DISTRICT
CITY/PARISH OF EAST BATON ROUGE
Expected Water Diversion as a
Result of the Project
Flood Frequency
(YR)
____________
5
10
25
50
100
*Inflow
Diversion (%)
*Outflow
___________
_________________
____________
16,200
22,100
28,400
37,500
45,800
8,150 (50%)
11,500 (52%)
14,500 (51%)
19,200 (51%)
20,700 (45%)
8,050
10,600
13,900
18,300
25,100
• Estimated flood stage reductions during last six major floods if project
would have been in place.
Date
Estimated Flood Stage Reduction
Joor Road
Comite River @ Comite
Amite River @ Denham Springs
April 1977
4.3 ft.
1.5 ft.
April 1979
4.5 ft.
1.5 ft.
April 1983
4.0 ft.
1.4 ft.
January 1990
4.5 ft.
1.5 ft.
January 1993
4.3 ft.
1.5 ft.
January 1994
4.5 ft.
1.5 ft.
Estimated Cost (2008/09)
Federal
$135,500,000
Non- Federal
$ 53,500,000
State (LADOTD) $43,500,000
ARBC
$10,000.000
Total
$189,000,000
ESTIMATED MAINTENANCE COST
(after project completion)
Non-Federal Responsibility
Dredge the Diversion Channel (25-year frequency)
Dredge the Comite River (10-year frequency)
$3,700,000
2,100,000
Clear & snag three bayous (7-year frequency)
244,000
Repair side slopes of diversion channel (annual)
63,000
Inspection, debris removal, Brooks Lake (annual)
70,000
Maintain low flow pumps (annual)
21,000
Monitoring program (annual)
75,000
Maintain mitigation areas (annual)
48,000
TOTAL ANNUALIZED COSTS
$493,000
• Estimated Cost (2009)
– Federal
– Non-Federal
• State (LADOTD)
• ARBC
• Total
$43,000,000
$10,000,000
$135,000,000
$ 53,000,000
$188,000,000