STRATEGIC PRIORITY: Mobility Solutions, Infrastructure, and Sustainability
AGENDA DATE: February 10, 2021
COUNCIL DISTRICT(S): 2, 5, 7
DEPARTMENT: Water Utilities Department
EXECUTIVE: Majed Al-Ghafry
______________________________________________________________________
SUBJECT
Title
Authorize Supplemental Agreement No. 2 to the professional services contract with Carollo Engineers, Inc. to provide additional engineering services for the design of wastewater pipeline capacity improvements along White Rock Creek - Not to exceed $6,819,130.00, from $4,756,525.00 to $11,575,655.00 - Financing: Wastewater Capital Improvement D Fund
Body
BACKGROUND
This action will authorize Supplemental Agreement No. 2 to the professional services contract with Carollo Engineers, Inc. for the survey and engineering of an estimated 28,000 feet of wastewater interceptor capacity improvements. The scope of work includes approximately 28,000 feet of surveying, 14,000 feet of 78-inch diameter wastewater interceptor final design, and approximately 14,000 feet of 78-inch diameter wastewater initial design for the purpose of preparing the first two of four planned construction phases for advertisement and bidding.
The White Rock Creek wastewater drainage basin was identified as a top priority capacity improvement need by the Wastewater Collection Comprehensive Assessment Update that was finalized and issued in April 2020. Preliminary engineering and alignment alternative evaluations were completed under the original contract and first supplemental agreement and made the recommendations being pursued under this supplemental agreement. The existing interceptors were built in 1948 and 1968 and have inadequate capacity for peak demands resulting in wastewater overflows and high maintenance costs. The proposed improvements will address the identified capacity deficiencies, reduce overflows and maintenance costs, and allow the White Rock basin to support additional capacity for future de...
Click here for full text