August 25, 2016
The final plans and bid package prepared by engineering consultant CWE were released for competitive bid on May 3, 2016. The competitive bid process involved five (5) addendums issued for bidder clarity; finally closing the bid on June 28, 2016. The result of the bid process culminated in the award of the project to Earth Construction and Mining of Garden Grove, on August 23, 2016. Earth Construction and Mining was determined to be the lowest responsible bidder in the amount of $1,887,517.
Construction the for capture and retention of sediment within the Houston Creek channel, along the ball fields at San Moritz and the established basin at the County Library, Houston Creek West, are illustrated on the accompanying plan sheets. The San Moritz Ball Field area has been identified and will be utilized as a sediment stockpile area as illustrated on the included graphic. The temporary use of this area is necessary to accomplish dewatering for transport and/or reuse of the material for the dam project.
Permit applications have been completed and submitted to the Regulatory Agencies; California Fish and Wildlife, Lahontan Water Board and US Army Corps of Engineers. Permits are pending.
Ball Field Stockpile
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May 6, 2016
Final design and construction drawings for the Lake Gregory Sediment Management and Bio-Retention Project have been completed. The project was released for competitive bidding by Board action on May 3, 2016. The project will address sediment inflows at Houston Creek West, the Library Basin; and Houston Creek South, near the San Mortiz Lodge.
Work at the West Basin includes vegetation clearing, excavation and removal of sediment from the existing basin, and construction of a concrete weir box with a low flow outlet system. A concrete retaining wall and landing with removable handrails are to be install to provide ease of access for ongoing sediment removal.
The South Basin work includes realignment of the existing ball field fence line, vegetation clearing and selective tree removal, excavation and removal of sediments in and along the existing creek bed, and installation of natural, step-down rock levees comprised of light weight rip-rap rock. Additional creek bank reinforcement and a low flow outlet system will also be addressed.
Concurrently, Construction Permit applications have been prepared and submitted to the Regulatory Agencies; California Fish and Wildlife, Lahontan Water Board and US Army Corps of Engineers. An additional set of permits for long term maintenance are currently being prepared.
The Initial Study for the Sediment Management and Bio-Retention Project
November 4, 2015
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Design and construction drawings for the for capture and retention of sediment within the channel along the ballfields at San Moritz and the established basin at the County Library is being undertaken by engineering consultant CWE. The improvements planned for these locations will allow for the fallout of sediment before it has an opportunity to enter the lake. Along with the design changes to current structures; a sediment management plan is in development to detail maintenance practices for permissibility through applications that will be made to the Regulatory Agencies: California Fish and Wildlife, Lahontan Water Board and US Army Corps of Engineers.
The preliminary timeline for channel and basin improvements is: February – March of 2016 for the Library basin, and May – June for the San Moritz Lodge channel along Houston Creek South.