Board authorizes $1.54 million for solids-handling construction package at Allen plant

The Englewood City Water & Sewer Board approved the Guaranteed Maximum Price (GMP) 2 construction package for the Solids Handling Improvements Project at the Allen Water Treatment Plant, authorizing $1,400,000 for GMP2 plus a 10 percent staff-managed contingency for a total authorization of $1,540,000.

Adam Marquez (Presenter/Staff member) described the project background: the plant previously used a belt filter press for dewatering sludge and shipped dewatered sludge to landfill. The belt filter press is past its useful life and could not meet plant throughput. The approved project replaces the belt filter press with a centrifuge, modifies building conveyors and elevations to match the new equipment, installs process piping and electrical equipment, and includes startup and testing. Long-lead equipment procurement began under GMP1; the centrifuge was expected to arrive in May and construction to proceed through the summer with the goal of returning the plant to normal solids removal operations.

Project scope and budget: GMP2 includes direct field work, project staffing and general conditions, bonds, insurance, taxes, permits, allowances (including a rehab allowance for the existing dredge), contractor contingency and markups. The GMP2 amount presented to the board was $1,400,000; staff recommended adding a 10 percent contingency and requested board approval for $1,540,000 total project authorization.

Board members asked about the project history and past temporary contractors. Staff explained that BioVelocity had been used previously to remove solids while the permanent centrifuge solution was designed and procured. The centrifuge solution matches units used at the South Platte facility, and staff said it should allow the plant to keep up with solids removal long term. The board approved GMP2 by voice vote.