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TO: Mayor Richard C. Irvin
FROM: Jason Bauer, P.E., Assistant Director of Public Works/Assistant City Engineer
DATE: September 4, 2018
SUBJECT:
Resolution authorizing the Director of Purchasing to execute Change Order Request Number 1 to the Contract with Swallow Construction, 4250 Lacey Road, Downers Grove, IL 60515 for the Tall Oaks Water Main Improvements - Phase 2, in Ward 1/Bohman.
PURPOSE:
To increase the Contract by $68,250 from the original value of $755,144.00 to a new Contract value of $823,394.00.
BACKGROUND:
This Change Order is necessary to increase the Contract value in order to account for unforeseen work items that were encountered in the field during construction. Change Order Request 1 is attached as Exhibit A, which details the changes for the project. The substantial changes are as described below:
The water main in the Tall Oaks subdivision has experienced a large number of breaks in recent years and as a result it has been completely replaced over the course of the last two years. The second phase of this project was installed directionally in an attempt to maintain access and reduce pavement restoration costs. Due to the limited entrances into the subdivision, the construction traffic caused unavoidable damage to the pavement. This significant expense was not anticipated, as very minimal pavement restoration was included.
An additional expense was stormwater related to include culvert stabilization and the restoration of the bank of the Indian Creek in the project area. As construction progressed, it was observed that the creek bed on a City owned parcel within the subdivision was severely eroded and was in immediate need of stabilization to eliminate a safety hazard; the bank was restored to the proper slope and stabilized with stone rip rap. Additionally at this location, the pavement was reinforced with concrete over the culverts due to pavement damage from the construction traffic.
Additionally, the water main t...
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