Page 177 - Project Detail Sheet_AdoptedBook

ADOPTED | BUDGET

Utility Capital Projects
Department Project Title Project Number
Public Works Sewer Manhole Replacement and Rehabilitation Project (2021) UT2104
Project Description
This project will replace or rehabilitate roughly 150 wastewater manholes throughout the City. Staff has completed an inspection of
approximately 5,500 manholes. Through this inspection process, it has been identified that 12% of the manholes (approximately
660) need some form of replacement or rehabilitation. This project will be spread out over a 5 year period to complete all 660
manholes.

Project Justification
Through the inspection process of the wastewater manholes, staff assessed each manhole on overall structural condition,
maintenance responsibility, and inflow/infiltration present. Each manhole was given a numerical grade on structural and
maintenance condition, with inflow/infiltration being noted as observed or being present. All manholes were inspected by one staff
member so grading would be consistent among all manholes. The manholes that makeup the 660 that need attention were graded
poor and very poor. The majority of these manholes also were noted to have inflow/infiltration. Inflow/infiltration in the wastewater
system causes many difficulties for the system. With rain events, the inflow/infiltration allows rainwater into the system causing
capacity issues with the possibility of creating sanitary sewer overflows. The additional rainwater also creates additional wastewater
flow to the treatment plants, which the City pays for in wastewater charges from the treatment plants. Brick manholes are a major
factor with allowing inflow/infiltration into the wastewater system. Brick manholes are no longer a method of building manholes. The
Department has identified three different rehabilitation techniques for this project. Each technique brings value to the project based
on the need of the manhole that needs repair. The three techniques include: total reconstruction, cured-in-place fiberglass manhole
liner, and sprayed epoxy manhole liner. After completion of the rehabilitation process of a manhole, the system will experience less
inflow/infiltration due to rainwater and have less risk of a major wastewater issue resulting from a manhole collapse.
Note: Project funding source is the Utility Fund (405).

Project Schedule Beginning Date Ending Date History Fiscal Year Amount
Professional Services Adopted Budget 2020-21 $250,000
Engineering/Design Total $250,000
Land/ROW Acquisition
Construction 10/2020 09/2021
Other
Total Schedule 10/2020 09/2021
Sources of Funds Appr. To Date 2021‐22 Budget 2022‐23 Estimate 2023‐Completion Total Funding
General Obligation Bonds
Certificates of Obligation
Federal/State Grants
Reserves 250,000 0 0 0 $250,000
Sales Tax
Other
Total Funding $250,000 $0 $0 $0 $250,000

Project Costs To Date 2021‐22 Budget 2022‐23 Estimate 2023‐Completion Total Cost
Professional Services
Engineering/Design
Land/ROW Acquisition
Construction 250,000 0 0 0 $250,000
Other
Total Costs $250,000 $0 $0 $0 $250,000
Operating Impact
No operating impact is anticipated.

Fiscal Year 2020‐21 2021‐22 2022‐23 2023‐24 2024‐25 Total Impact
Amount $0 $0 $0 $0 $0 $0

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