Description
LPV-146 - Chalmette Loop Levee - Bayou Dupre to Hwy 46
719+40 to 1119+06. Construct T-wall on top of existing levee to 100 yr elevation and emergency bypass for Highway 46.
This reach is approximately 39,966 ft long. The work in this reach consists of a new reinforced concrete T-wall supported by steel H-piles to be built on the existing levee. The existing levee will be slightly degraded in order to drive H-piles, drive steel sheet pile for seepage cut-off, and place a stone pad for placement of concrete footing. The foundations are typically embedded approximately 3.0 feet into the crown for erosion protection. Riprap will be placed from the flood-side toe to the protected-side toe for scour protection. The existing earthen levee ranges in elevation 17.5 to 21.5. The floodwall will be constructed to elevation 31.5 for future (2057/2060) conditions. An emergency bypass for Highway 46 will also be constructed. Early Contractor Involvement (construction) will be used on this reach.
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