The District completed a 20 Year Wastewater Facilities Plan in January 2012. The Wastewater Facilities Plan identified a series of upgrades to the District’s existing wastewater treatment plant including portions of the effluent disposal system.
The improvements will address the needs for the facility through the year 2030.
The District's Wastewater Facilities Plan (Facilities Plan) finalized in January 2012, presented several treatment alternatives and recommended replacing the existing facultative lagoon system with an in-basin extended aeration system. Subsequently, two manufacturers of in-basin extended aeration systems, Bioworks and Parkson, have been chosen as the preferred vendors for the extended aeration system.
The major proposed WWMF improvements include a new headworks facility; aeration basins; a blower/electrical/maintenance building; two new secondary clarifiers, including return activated sludge/waste activated sludge (RAS/WAS) pumping; and a biosolids storage basin.
The preliminary design cost estimate indicates the bid price to be approximately $13.2M.
Biosolids Project
The first phase of the upgrade progress has just been completed. Pond 1A was taken out of service, partially drained, and dredged by SynaGro WWT Inc. The sludge was then dewatered and the resulting biosolids hauled off, prior to breaking ground on the plant upgrade.
This is the pond to be filled for construction of the improvement project. Upon completion of the biosolids removal, pond dewatering can be accomplished by district staff while still meeting permit requirements on the existing treatment facilities a cost savings to the District.
Potholing of Existing Facilities
District staff is in the process of potholing existing facilities. Potholing is the digging of small holes over pipelines and conduits, so the depth and type of material can be verified. Potholing these facilities allows the contractor to accurately map, and shoot elevations on them, prior to the project commencing. Having district staff perform this task instead of the contractor is another cost savings to the District.
90% Design
The 90% design plans for the new plant are expected to arrive from the engineer by November 14th, 2014. They will be reviewed by District staff and returned to the engineer with further comments. The design has been accomplished in phases, (30%, 50%, 90% and final) with a comment period by staff after each phase
MCSD Wastewater Management Facility Improvements Project Open House
Scheduled for December 9, 2014 from 4 pm to 7 pm at Azalea Hall