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TO: Mayor Thomas J. Weisner
FROM: David E. Schumacher, P.E.; Superintendent of Water Production
DATE: October 30, 2014
SUBJECT:
Resolution to authorize a Professional Services Agreement for the design and construction observation of the Water Treatment Plant Roofing and Skylight Replacement project for the Water Production Division
PURPOSE:
To obtain City Council approval to attain a professional engineering services agreement with Cordogan Clark & Associates, Aurora, IL (CCA) for the design and construction observation of the Water Treatment Plant Roofing and Skylight Replacement project for the Water Production Division.
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 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 refurbishment or 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. Also, numerous leaks at many locations throughout the WTP have developed over the past ten years. The quantity and frequency of the leaks has increased as the membrane continues to be broken down by the elements.
If they can be located, the WPD does patch the leaks as they generate, but this has proven to be very difficult at times. When holes develop in the membrane, water passes through, gets onto the sloped insulation material, and can travel for quite a distance prior to actually leaking into the interior of the WTP where it can be detected. Thus, because of this travelling, locating the actual holes in the membrane can be difficult.
In addition to the membrane issues, the four originally installed large barrel-vaulted skylights need replacement or maintenance. The two largest skylights are approximately 15 feet wide by 47 feet long and the glazing of all the skylights is cracked and leaking. Several options exist for the skylights regarding either complete replacement or refurbishment. These alternatives will be investigated by CCA to determine the best long-term option regarding cost and performance.
Funding for both the design and construction observation professional services and the actual construction of the project is currently available in the 2014 City Budget account No. 510-4058-511-73-08 as part of CIP#I040. If the project proceeds on the currently developed schedule, the skylights and roofing materials will be over 23 years old at the time of their replacement.
IMPACT STATEMENT:
None.
RECOMMENDATIONS:
That the Mayor and City Council approve the attached resolution authorizing the Purchasing Director to execute an agreement with Cordogan Clark & Associates for the design and construction observation of the Water Treatment Plant Roofing and Skylight Replacement project on a time-and-material basis, for a not-to-exceed amount, of $ 60,000.00 for the Water Production Division. It is further recommended that this matter be forwarded to the Buildings, Grounds, and Infrastructure Committee for review and recommendation.
cc: Alderman Peters, Chairman
Alderman Garza
Alderman Bugg
Alderman Saville, Alternate
CITY OF AURORA, ILLINOIS
RESOLUTION NO. _________
DATE OF PASSAGE ________________
title
A Resolution to authorize a Professional Services Agreement for the design and construction observation of the Water Treatment Plant Roofing and Skylight Replacement project for the Water Production Division
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WHEREAS, the City of Aurora has a population of more than 25,000 persons and is, therefore, a home rule unit under subsection (a) of Section 6 of Article VII of the Illinois Constitution of 1970; and
WHEREAS, subject to said Section, a home rule unit may exercise any power and perform any function pertaining to its government and affairs for the protection of the public health, safety, morals, and welfare; and
WHEREAS, the Aurora Water Treatment Plant was constructed in 1992 and the original existing roofing materials and large barrel-vaulted skylights are nearing the end of their useful lives; and
WHEREAS, the Water Production Division seeks to replace the roofing materials and replace or refurbish the large skylights over the original portion of the facility; and
WHEREAS, a proposal has been received from Cordogan Clark & Associates to provide the necessary design and construction observation professional architectural services to satisfactorily complete the project; and
WHEREAS, budgetary authority is granted and funds are available in the 2014 City Budget account No. 510-4058-511-73-08;
NOW, THEREFORE, BE IT RESOLVED by the City Council of the City of Aurora, Illinois, as follows: The Purchasing Director is hereby authorized to execute a professional services agreement with Cordogan Clark & Associates for professional design and construction observation services for an amount not-to-exceed $ 60,000.00 for the Water Treatment Plant Roofing and Skylight Replacement project.
PASSED AND APPROVED on ______________.
AYES ____ NAYS ____ NOT VOTING ____ ABSENT ____
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Alderman Bohman, Ward 1 Alderman Garza, Ward 2
____________________________ __________________________
Alderman Mesiacos, Ward 3 Alderman Donnell, Ward 4
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Alderman Peters, Ward 5 Alderman Saville, Ward 6
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Alderman Hart-Burns, Ward 7 Alderman Mervine, Ward 8
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Alderman Bugg, Ward 9 Alderman Johnson, Ward 10
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Alderman Irvin, At Large Alderman O'Connor, At Large
ATTEST:
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City Clerk Mayor