2022-2026 Capital Improvement Program.pdf

Contact Tim Wilkey Depar tment PUBLIC WORKS

V3151

Pr oject #

Pr oject Name Digester Complex Rehabilitation

Type One Phase

Useful Life 20 years

MATCH % NONE GRANTEE NONE

TIF DISTRICT None PLAN None

Categor y Wastewater Treatment

Pr ior ity Critical (1)

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 Pr oject Cost: $12,921,000 Status Active

Expenditur es

Total

2022

2023

2024

2025

2026

Pr ior

880,000

880,000

PLANNING/DESIGN CONSTRUCTION

120,000

10,621,000

10,621,000

Total

200,000 100,000

200,000 100,000

INSPECTION

ADMINISTRATION CONTINGENCY

1,000,000 11,921,000

1,000,000 12,801,000

880,000

Total

Funding Sour ces REVENUE BONDS

Total

2022

2023

2024

2025

2026

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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