Title
Deer Valley Water Treatment Plant Rehabilitation 2015 - Construction Administration and Inspection Services Amendment 1 - WS85260029 (Ordinance S-45270)
Description
Request to authorize the City Manager, or his designee, to execute an amendment to Agreement 144105 with Wilson Engineers, LLC, to provide additional construction administration and inspection (CA&I) services for the Deer Valley Water Treatment Plant (WTP) Rehabilitation 2015 project. Further request to authorize execution of amendments to the agreement as necessary within the Council-approved expenditure authority as provided below, and for the City Controller to disburse all funds related to this item. The additional fee for services included in this amendment will not exceed $443,221.
Report
Summary
The purpose of this project is to provide necessary rehabilitation for the Deer Valley Water Treatment Plant (WTP). The Deer Valley WTP, built in 1964, provides up to 150 million gallons per day of potable drinking water by treating Colorado River water obtained through the Arizona Canal. A condition assessment indicated that the treatment systems require rehabilitation due to deterioration and corrosion caused by age and usage.
This amendment is necessary because construction during the annual plant shutdown was interrupted and the contractor could not complete the project in the shortened shutdown time. Construction was periodically halted because the Deer Valley WTP had to be turned on to accommodate operational changes necessitated by an unforeseen U.S. Army Corps of Engineers Alamo Dam repair project that increased raw water flows to Lake Pleasant. This amendment will provide additional funds and time to the agreement.
Contract Term
The term of the amendment is 301 calendar days from issuance of the Notice to Proceed. Work scope identified and incorporated into the agreement prior to the end of the term may be agreed to by the parties, and work may extend past the termination of the agreement. No additional changes may be executed after the end of the term.
Financial Impact
- The initial agreement for CA&I services was executed for a fee not-to-exceed $1,615,000, including all subconsultant and reimbursable costs.
- Amendment 1 will increase the agreement by an additional $443,221, for a new total not-to-exceed agreement value of $2,058,221, including all subconsultant and reimbursable costs.
Funding for this amendment is available in the Water Services Department's Capital Improvement Program budget. The Budget and Research Department will separately review and approve funding availability prior to execution of any amendments. Payments may be made up to agreement limits for all rendered agreement services, which may extend past the agreement termination.
Location
30th Avenue and Dunlap Avenue
Council District: 1
Concurrence/Previous Council Action
The City Council approved:
- Design Services Agreement 140976 (Ordinance S-41954) on July 1, 2015; and
- CA&I Agreement 144105 (Ordinance S-43105) on Dec. 14, 2016.
Department
Responsible Department
This item is submitted by Deputy City Managers Karen Peters and Mario Paniagua, the Water Services Department, and the City Engineer.