WS - C - Water Sewer Rate Structure Increase Information - Water Plant Upgrade Project

WATER RATE ANALYSIS City of Tiffin IA * This is based on the Water portion of the utility bill and does not include sewer Based on 15M 20 year 3.09% SRF water revenue loan Option 3 Proposed Rate Increases Estimated Initial Current FY2025 Increase for FY2026 Percentage Increase Min. Bill Gallons 0 0 Usage Rate per 1,000 Gallons $5.50 $12.00 118% Base Rate $7.00 $10.00 43% User Impacts 1,000 12.50 22.00 76% 2,000 18.00 34.00 89% 4,000 29.00 58.00 100% 10,000 62.00 130.00 110% 25,000 144.50 310.00 115% Key Assumptions * Assumes utility rates/growth will increase to match inflation in operation and maintenance costs * Assumes Operating rate increases maintain a 2% increase on base rate and flow rate Estimate and subject to change based on project cost and actual operating revenues and expenditures Prepared by Northland Securities, Inc. on 4/15/2025