Consent 1.C.
Regular City Council Meeting
- Meeting Date:
- 12/18/2017
- TITLE
- W.O. 18-01 Schedule 3, 48-inch and 60-inch interceptor Study
- PRESENTED BY:
- David Mumford
- Department:
- Public Works
Presentation:
No
PROBLEM/ISSUE STATEMENT
The City Council will consider awarding a Professional Engineering Services Contract to Morrison-Maierle, Inc. (MMI) in the amount of $303,984 for an engineering study on the 48-inch and 60-inch wastewater interceptors that enter the Water Reclamation Facility (WRF) for Schedule 3 of the 2018 Sanitary Sewer and Water Replacement Projects. The City replaces and upgrades its sanitary sewer utilities as part of an annual maintenance program. The existing interceptors are made from reinforced concrete pipe (RCP). The existing 60-inch interceptor has concrete spalling on the inside of the pipe that has exposed the rebar in some locations. These interceptors convey all the wastewater flows into the WRF for the entire city excluding the Heights.
This study will model existing and future flows for capacity, complete a condition assessment of the existing interceptors using lidar or sonar cameras, evaluate open cut and trenchless alternatives for replacement, evaluate by-pass pumping conflicts, provide a sediment removal plan, develop a preliminary cost estimate, and recommend project phasing. The study will analyze approximately 6,300 linear feet of the 48-inch interceptor and approximately 8,250 linear feet of the 60-inch interceptor.
Morrison-Maierle, Inc. was selected based on City staff review of project proposals submitted by prequalified firms. Other firms considered for the work were DOWL, Sanderson Stewart, Pioneer Engineering, and Great West Engineering.
This study will model existing and future flows for capacity, complete a condition assessment of the existing interceptors using lidar or sonar cameras, evaluate open cut and trenchless alternatives for replacement, evaluate by-pass pumping conflicts, provide a sediment removal plan, develop a preliminary cost estimate, and recommend project phasing. The study will analyze approximately 6,300 linear feet of the 48-inch interceptor and approximately 8,250 linear feet of the 60-inch interceptor.
Morrison-Maierle, Inc. was selected based on City staff review of project proposals submitted by prequalified firms. Other firms considered for the work were DOWL, Sanderson Stewart, Pioneer Engineering, and Great West Engineering.
ALTERNATIVES ANALYZED
City Council may:
- Approve awarding the Professional Engineering Services Contract to Morrison-Maierle, Inc., or;
- Do not approve awarding the engineering contract to Morrison-Maierle, Inc. If the project is not awarded, the City's sanitary sewer collection systems in these areas will continue will be unreliable and may experience ongoing maintenance problems and expenses.
FINANCIAL IMPACT
Funding for this project has been approved by City Council in the FY18 budget. Schedule 3 projects will use sanitary sewer funds.
| Sewer Replacements | |
| Project Budget | $3,400,000 |
| Previously Encumbered | $653,074 |
| This Contract | $303,984 |
| Budget Remaining | $2,442,942 |
RECOMMENDATION
Staff recommends that the City Council award a Professional Engineering Services Contract for the design and construction administration of Schedule 3 of the 2018 Sanitary Sewer Rehabilitation Projects to Morrison-Maierle, Inc., in the amount not to exceed $303,984.