Title
153rd Street Watermain - Proposal
History
In the course of the ongoing 153rd Street Reconstruction and Widening Project at the new Park Station Boulevard entrance into the Cherry Hill Subdivision, the 36” distribution watermain was found to be significantly more shallow than anticipated. While excavating the new roadway, the top of the watermain was found to be only 6” below the rough excavation and 30” below the finish street elevation. A minimum depth of 5’ is needed to cover a watermain.
This major distribution main runs along 153rd Street in an adjacent easement on the south side of the street and services the entire western portion of the Village.
To ensure appropriate cover is maintained, the design engineer (Christopher B. Burke Engineering Ltd.) was asked to submit a revised grading profile to the Cook County Highway Department. This re-engineering resulted in an additional 14” of cover on the watermain. To implement these changes, the cost for this additional work will be $25,000.
The additional cover needed to obtain the minimum 5’ depth will be achieved by lowering the watermain in place. Airy’s, Inc. of Tinley Park, Illinois, was asked to provide a proposal for this specialized and difficult challenge. Their proposal totals $60,087 to complete the work in one 16-hour day. Because of the nature of this work, a contingency is requested totaling $9,913.
Due to the emergency nature of this work and potential for catastrophic failure, it is requested that the bid process be waived. This work will be accomplished at the earliest possible time based on weather conditions and water demand.
On July 9, 2007, this item was reviewed and approved by the Public Works and Engineering Committee and referred to the Board for approval.
INFORMATION PREVIOUSLY PROVIDED AS PART OF THE JULY 9, 2007, PUBLIC WORKS AND ENGINEERING COMMITTEE PACKET.
Financial Impact
Funds are available in the Underground Water and Sewer Account #031-6004-433.70-50 to ...
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