Responses to Levee Certification Requests 1.Closures 2.Maintenance Plans 3.U/S and D/S Levee Tie-ins

Closures All openings must be provided with closure devices that are structural parts of the system during operation and designed according to sound engineering practices. 44 CFR (b) (2)

Closures

COE built levee Ponding area behind the levee

Closures

CONSIDERATIONS Pipe outlet above BFE Ponding area behind levee Pipe inlet above BFE

Maintenance Plans …document the formal procedure that ensures that the stability, height, and overall integrity of the levee and its associated structures and systems are maintained. 44 CFR (d) NOTE: no specific requirements regarding vegetation or other maintenance practices

Unwanted Vegetation Growth USACE ETL Guidelines for Landscape Planting and Vegetation Management at Levees, Floodwalls, Embankment Dams, and Appurtenant Structures

Vegetation

Maintenance Plans “The levee inspection log notes that large trees are located adjacent to the toes on the landside and riverside of the levees Several animal burrows observed in levee inspections may lead to seepage or slope stability problems These issues must be addressed in accordance with the maintenance procedures specified in the O&M Manual before the levee can be accredited.”

Tie-in at upstream and downstream limit “ An additional ½ foot above the minimum (freeboard) at the upstream end of the levee” 44 CFR 65.10

Tie-in at upstream and downstream limit FEMA 316-AD Response Letter Considerations Is natural high ground available and necessary? Is high ground at the downstream end available and necessary ? natural upstream and downstream sides. natural high

Responses to Levee Certification Requests Questions & Answers & Other Experience