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Consent

Brentwood City Commission Agenda

Meeting Date:	03/11/2019
Resolution 2019-21 - Approval of Agreement with Hazen and Sawyer for Continued Sewer System Modeling Services
Submitted by:	Chris Milton, Water & Sewer
Department:	Water & Sewer

Information

Subject

Resolution 2019-21 - Agreement with Hazen and Sawyer for Continued Sewer System Modeling Services.

Background

One of the more powerful tools for planning improvements that will operationally and economically optimize a sanitary sewer or water system is a hydraulic computer model. In 2014, the Water Services Department obtained the services of the Hazen and Sawyer engineering firm ("Hazen") for development of the City’s sewer system model for enhanced planning and system operational management.

The model is periodically calibrated based on actual flow monitoring data collected from the field. Flow monitors are placed in manholes located throughout the sewer system to measure localized flows. This data is invaluable in planning and prioritizing rehabilitation efforts to reduce storm water inflow and infiltration.   Staff and engineers will also utilize the flow data and model inputs to perform detailed system analysis, conduct capacity assurance evaluations, and prepare reports to state and federal agencies.

The previous agreement with Hazen expired in February of this year. To continue with these modeling services, staff is recommending approval of a new agreement with Hazen which, like the previous agreement, is proposed for one year with up to four one-year renewals. The cost for annual services are determined annually during budget preparation, but generally are estimated to not exceed $25,000. These modeling services will be billed at hourly rates as specified in the agreement with task orders being issued by staff on an as-needed basis.

This “template” for modeling services was established with the department’s water system model in 2007 and has worked very well.  Hazen has been chosen by the department to continue these services because of their exceptional past performance and cost savings to the City resulting from not having to duplicate labor for model development and calibration or the potential for repeated cost of modeling software that could be incurred by a firm that does not support the software used by the department. Hazen’s proposed rates are in line with those charged by firms for similar work, and due to this and their previous performance, it is staff's opinion they are best suited to continue to provide these services.

Please feel free to contact Chris Milton should you have any questions.

Staff Recommendation

Staff recommends approval.

Previous Commission Action

Resolution 2014-10 Authorizing agreement with Hazen and Sawyer for Sewer Model Development.

Fiscal Impact

Amount :	As Budgeted
Source of Funds:	Water & Sewer Funds
Account Number:	412-52310-82599

Fiscal Impact:

Attachments
Resolution 2019-21
Contract No. 2019-020
Signed Resolution