Council action is requested to issue a purchase order to Black & Veatch Corporation, in the amount of $446,406.00 for engineering design and construction phase services to add an additional lime slaker to the existing silo at the Courtney Bend Water Treatment Plant for the Water Department.

Council action to issue a purchase order.

This project will provide for engineering design and construction phase services to add an additional lime slaker to the existing silo at the Courtney Bend Water Treatment Plant. Lime slakers are used to feed lime to the well water, which removes minerals and provides the softening process for the water. When the lime silo was installed in 2002, one slaker was installed to provide softening chemicals to two contact basins. This project will provide for a second redundant slaker to be installed which will provide backup for the existing slaker, as well as increase the lime feeding capacity to include four contact basins. This project will provide for design and construction phase services to install a new slaker and corresponding control panel and a new lime slaking building to house an additional slurry tank, grit separator and circulation pumps.

Staff’s recommendation is to issue a purchase order to Black & Veatch, who designed the original lime silo and slaker in 2002. Black & Veatch also provides all the SCADA programming which will be needed for this addition. Black and Veatch has performed well on other design and construction projects. Black & Veatch was selected per State Statute 8.285, et seq, which calls for seeking architectural, engineering and land surveyor services based on qualifications. The Purchasing Division issues a Request for Qualifications bi-annually and has established a qualified list for such services.

This project is a budgeted item in the Water Department’s FY20-21 capital budget.

Approval of this item authorizes changes orders up to a total of ten (10) percent of the original authorized amount for each order, providing appropriations are available.

The fiscal impact to the City is $446,406.00. Funding is included in the fiscal year 2020/21 adopted budget, page 163, account number E (401608 –C - - ) Lime Silo