FY2023 Adopted Budget

PUBLIC WORKS

Department

V3151

Project #

Tim Wilkey

Contact

Project Name Digester Complex Rehabilitation

One Phase

Type

20 years

Useful Life

GRANTEE NONE

PLAN None

Wastewater Treatment

Category

MATCH % NONE

TIF DISTRICT None

Critical (1)

Priority

Description The future project has two parts: 1) Provide process/related structures and equipment removing phosphorous before or during digestion. 2) Replace multiple heat exchangers (HEX) with internal corrosion and Struvite deposition, renovate digester covers, install wall thimbles in digester wall for inspection and cleaning, replace internal/external(buried) piping clogging with Struvite, replace (HEX) and sludge recirculation pumps as required and add new piping for the thickened Waste Activated Sludge. Justification Biological nutrient removal was part of last ICWWTP project, captured phosphorous (P) reduces Struvite formation and reduces maintenance costs. In addition. the digester complex was constructed in 1989/2002 and has multiple covers in various stages of wear, along with multiple pumps and HEX’s and multiple valves/pipes show struvite deposition that have required significant maintenance to keep cleared of struvite or need to be replaced. Total Project Cost: $12,921,000 Status Active

Expenditures

Total

2022

2023

2024

2025

2026

Prior

PLANNING/DESIGN

880,000

880,000

120,000

CONSTRUCTION

10,621,000

10,621,000

Total

INSPECTION

200,000

200,000

ADMINISTRATION

100,000

100,000

CONTINGENCY

1,000,000

1,000,000

880,000

11,921,000

12,801,000

Total

Funding Sources

Total

2022

2023

2024

2025

2026

REVENUE BONDS

12,921,000

12,921,000

12,921,000

12,921,000

Total

Budget Impact/Other This project will reduce operating and maintenance cost through the rehabilitation of older equipment. The annual savings is less than $10,000 per year.

This serves as a declaration of official intent under Treasury Regulation 1.150-2 that it is reasonably expected that capital expenditures will be made in respect of the above-described project, such expenditures to be advanced from the Wastewater fund, and the City reasonably expects to reimburse all or a portion of the expenditures with the proceeds of bonds, notes or other indebtedness to be issued or incurred by the City in the future.

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