Description

LPV-09.1 - PS#1 (Bonnabel) Floodwall Tie ins & Floodwall/Gate at Boat Launch - Phase 1
Scour protection and minor earthwork.

This pump station is at the end of an interior drainage canal that approaches the lakefront levee at a significant angle to the shoreline. Because the pump station sits perpendicular to the canal centerline and a short distance landward from the lakeshore, the western end of the station is offset by several hundred feet from the hurricane protection levee alignment, and the east end setback, but less than the west side. At present a low levee and the embedded steel sheet pile (and I-Wall) connects the west end of the pump station's fronting protection to the lakefront hurricane protection levee. Both the levee and the embedded I-wall are legacy elements of the flood protection system pre-dating the LPVHPP, and do not meet current standards for strength, elevation and stability. East of the station a short section of tall I-wall provides a transition between the station and the adjacent levee. The extension of this I-wall above the supporting ground does not meet current standards and thus is also deficient. The plan to remedy these deficiencies calls for new levees and floodwalls on both sides of the pump station. Also the Bonnabel Blvd. vehicular gates and the concrete monoliths in which they are mounted, as well as the flanking concrete capped transitional I-walls are deficient in elevation.

LPV-09.2 - Pumping Stations #1 (Bonnabel), #2 (Suburban), #3 (Elmwood) and #4 (Duncan) Modifications, Fronting Protection, Positive Cutoff and Floodwall Tie-ins - Phase 2
Bring to 100-yr. level of protection. Contracts LPV-09.2, 10.2, 11.2 and 12.2 have been combined into 09.2

This contract will provide fronting protection across the discharge basins at Pumping Stations No 1 thru 4, and modifications to the two existing breakwaters at Pumping Stations No 2 and 3.

LPV-09a.2 - Pumping Station #1 (Bonnabel) Breakwater - Phase 2
Construct concrete breakwater to elevation 14 ft.

Located in Jefferson Parish, on the east side of Causeway bridge and at the end of the Bonnabel canal, breakwater protection consists of a concrete monolith atop concrete pilings, similar to those constructed at Pump Stations 2 and 3. Pile driving and most construction will be accomplished from barges and floating plant. The structure will extend approximately 850 feet with a top elevation of 14 feet. The breakwater will be constructed to protect the outfall channel and pump station from wave attack.

CONSTRUCTION ACTIVITIES

LPV-09.1 - Construction complete.

LPV-09.2 - 16 November 2010: Delivery of materials and installation for the temporary retaining structure and work platform is to continue. Contractor will continue work for pile driving operations of the 36" pipe pile and the crane platforms, dredging and rip rap removal at protected side 2, construction of a docking/mooring area at each station and work to install beam caps, truss and mats for the work platform/temporary retaining structure. Delivery of concrete piles for the breakwater and uncoated H-piles is expected to continue. Drilling of dowel holes on the breakwater is expected to begin.

LPV-09a.2 - Construction complete.