From
Ron McCuller
Title
Change Order/Amendment No. 3 to the Freese & Nichols contract in the amount of $156,913 to provide for additional engineering services on the Mansfield Pump Station and S.H. 360 Transmission Line Phases 2 and 3 Contract for pipeline design changes, additional easement acquisition and design of an 8" water line to serve existing residents on Davis Road
Presenter
Ron McCuller, Public Works Director
Recommended Action
Approve
Analysis
On January 15, 2013, City Council (12-2353) approved an engineering contract with Freese & Nichols, Inc. for the site study, preliminary design, and four separate design and construction administration packages entailing the pump station facility design, pump and electrical design, S.H. 360 TransLine, Phase 2 and S.H. 360 Transline Phase 3 in the total amount of $956,500.
This contract provided engineering services to complete the Mansfield supply system which included a ground storage tank, pump station and water transmission lines extending from the pump station to connect to the existing Midlothian supply line on U.S. 287. These facilities will be assets wholly owned by the City of Grand Prairie.
At the current time, this contract has been delayed in completion due to difficulties in easement acquisition, additional engineering associated with the location of and design for working around two (2) gas transmission lines at an additional cost of $10,835 (Change Order/Amendment No. 1) and an extension of time from the original contact ending date of January 31, 2015 to June 30, 2017 (Change Order/Amendment No. 2).
The current Change Order/Amendment No. 3, adding a cost of $156,913 provides for additional easement acquisition and design of an 8" water main to serve existing residents on Davis Road, currently being served by Johnson County Special Utility District but being transferred to the City of Grand Prairie as a result of our previous annexation of this area and subsequent CCN transfer. It also provides for revision of water line design due to a change in alignment necessary due to work around a property wherein we were unable to acquire an easement. In addition, certain changes in the pump station design are necessary due to a change in the contract with Johnson County Special Utility District.
Revised contract amount will be $1,124,248 will an expiration date of December 31, 2018.
Financial Consideration
Funding for change order #3, in the amount of $156,913, is available in Water Capital Projects Fund (500592) WO #01710003 (Mansfield Water Supply Line)