Title
Resolution to Ratify Emergency Change Order Request to the Construction Contract with E.T. MacKenzie Company for the Plymouth Road and Green Road Water Main Replacement Project ($474,645.84)
Memorandum
Attached for your review and approval, please find a resolution that ratifies the Emergency Change Order (Change Order #2) to the Construction Contract with E.T. MacKenzie Company for unanticipated work needed to complete the Plymouth Road and Green Road Water Main Replacement project.
In August 2016 and January 2017, large water main breaks occurred within the Plymouth Road and Green Road intersection. In response, the Public Works Unit expedited the design of a project to remove and replace all existing water main within the immediate vicinity of the intersection. In coordination with the water main replacement, the City reconstructed the entire intersection to address the loss of supporting soil.
The work on this project commenced on May 8, 2017. During construction, the contractor and staff faced challenges with existing valves not shutting off properly. In order to limit the number of properties without water service during scheduled shutdowns, the contractor had to use additional line stops, gate valves, and insertion valves. There were also challenges with making connections to existing pipes, which in many cases were found to be in poor condition. All of this required the extension of the construction limits, and therefore increased the cost of the project.
In addition, some existing utility locations were found in the field to be in conflict with the proposed water main location. The contractor had to reroute the new water main in the field, which required installation of additional pipe and fittings. Additional traffic control devices were also needed to be installed to provide a safe work environment adjacent to traffic.
The construction contract with E. T. MacKenzie Company in the amount of $2,059,990.00 was approved on April 17, 2017 (Reso...
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