cover
TO: Mayor Thomas J. Weisner
FROM: David E. Schumacher, P.E.; Superintendent of Water Production
DATE: May 15, 2015
SUBJECT:
Resolution to award a contract for the Roofing and Skylight Replacement project for the Water Production Division.
PURPOSE:
To obtain City Council approval to award the Roofing and Skylight Replacement project for the Water Production Division to Olsson Roofing Company, Inc., Aurora, IL, in an amount of $700,550.00.
BACKGROUND:
The Aurora Water Treatment Plant (WTP) was originally constructed in 1992 with an expansion occurring in 2002. The original WTP building is approximately 49,000 square feet and the existing roof over this portion of the WTP is a single-ply EPDM fully-adhered membrane. This membrane is placed on top of sloped polystyrene insulation material. While the membrane has lasted and performed well for the last 22 years, it is nearing the end of its useful life. Also, four large barrel-vaulted skylights are in need of replacement.
DISCUSSION:
The roofing which exists at the WTP protects not only the treatment plant area, but also the laboratory and office spaces located at the facility. As the roof system has aged, the membrane has become unattached and has begun to "billow" at several locations. In addition to the membrane issues, the four originally installed large barrel-vaulted skylights need replacement as the glazing of all the skylights is cracked and leaking.
The contract to perform the reroofing and skylight replacement work was advertised on April 12, 2015, and bids were opened on May 13, 2015. A total of seven submittals were received (bid summary attached). The lowest responsive bid was submitted by Olsson Roofing Company, Inc., Aurora, IL, (OLS) for $700,550.00. The total range of bids received was $700,550.00 to $896,900.00, with the three low bids being less than $46,000.00 apart. Cordogan Clark & Associates, Aurora, IL (CCA), the project consultant, provided an archit...
Click here for full text