WS - D - Tiffin Water Study $15 Base Rate & 50-50 Increase Summary

WATER RATE ANALYSIS City of Tiffin, Iowa * This is based on the Water portion of the utility bill and does not include sewer Based on 14.384M 20 year 3.09% SRF water revenue loan $15 Base Rate Proposed Rate Increases Current FY2025 FY2026 FY 2027 FY2028 Min. Bill Gallons 0 0 Usage Rate per 1,000 Gallons $5.50 $5.75 $7.85 $10.15 Base Rate $7.00 $15.00 $15.00 $15.00 User Impacts 1,000 12.50 20.75 22.85 25.15 2,000 18.00 26.50 30.70 35.30 4,000 29.00 38.00 46.40 55.60 10,000 62.00 72.50 93.50 116.50 25,000 144.50 158.75 211.25 268.75 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 5/1/2025