Final FY25 Adopted Budget
2024 2028 thru
Capital Improvement Plan 2024-2028 City of Iowa City, Iowa
PUBLIC WORKS
Department
Contact Tim Wilkey
One Phase
Type
V3151
Project #
20 years
Useful Life
Project Name Digester Complex Rehabilitation
Wastewater Treatment
Category
GRANTEE NONE
PLAN None
Critical (1)
Priority
MATCH % NONE
TIF DISTRICT None
Active
Status
Total Project Cost: $16,200,000
Description This project will have multiple phases to rehabilitate and improve the digester complex. The phases will include new process related structures and equipment to mitigate struvite formation and improve sludge quality. General building and equipment improvements include heat exchanger replacements, digester cover repairs and/or replacement, sludge recirculation pumps and piping, electrical, instrumentation and controls upgrades.
Justification Biological nutrient removal as part of the 2014 project captures phosphorous (P) and creates struvite in the digesters. It collects on piping, equipment and in structures. Current struvite management uses extensive maintenance resources. Additionally, the digester complex was constructed in 1989/2002 and the facility and equipment are at various stages of wear, nearing the end of their useful life.
Prior
Expenditures
Total
2024
2025
2026
2027
2028
CONSTRUCTION
12,500,000
12,500,000
1,900,000
INSPECTION
200,000
200,000
Total
ADMINISTRATION
100,000
100,000
CONTINGENCY
1,500,000
1,500,000
14,300,000
14,300,000
Total
Funding Sources
Total
2024
2025
2026
2027
2028
REVENUE BONDS
16,200,000
16,200,000
16,200,000
16,200,000
Total
Budget Impact/Other This project will reduce operating and maintenance cost through the rehabilitation of older equipment and adding new 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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