Storm Water Utility City of Durand 1

Storm Water Utility City of Durand 1

Storm Water Runoff • Rainwater flows across streets, parking lots, driveways, lawns • Pollutants are picked up by the storm water – Oils from cars & trucks. – Fertilizers/pesticides from lawns & farms – Organics from grass & leaves – Salts and Sediments from street maintenance. 2

Storm Water Runoff • Erosion of existing soils – Steep slopes left without vegetation – Construction site with no erosion control • Pollutants and Soils are carried to the Chippewa River. 3

Why Treat Stormwater? • Environmental Stewardship. • NR 151 – Redevelopment must remove 40% suspended solids. New Development must remove 80% suspended solids. – Developed runoff rates must match the undeveloped rates. – Developed infiltration volumes must meet capped percentages of undeveloped infiltration volume. • NR 216 – Currently, all communities larger than 10, 000 or more need a storm water discharge permit, similar to the WWTP discharge permit. 4

Storm Water Funding Sources Two primary methods of raising funds to install, support, and improve storm water systems: • Property Taxes • Storm Water Utility 5

Property Taxes • Pros: – Existing payment collection system. – Spreads costs by property value. • Cons: – Some properties tax exempt. – Single family residential pays disproportionately. – Current levy requirements make it difficult to finance large projects. 6

Storm Water Utility • Pros: – Costs spread by impervious area – “Users Pay” » Burden is shifted away from single family residential properties. » Burden is shifted toward commercial, industrial, and institutional properties. – Operates like water or wastewater utility. – Charges can be structured to provide incentives • Cons: – Perception of new charges 7

Eligible Utility Costs • • Construction of storm water ponds. Maintenance of storm sewers. Maintenance of ponds. Street sweeping. Leaf collection. Erosion stabilization. Administrative costs. 8

Process 1. Prepare a budget for capital improvements. 2. Prepare budget for proposed expenses (operation, maintenance, debt service). 3. Determine the average residential impervious surface square footage and the number of single family homes in the community. 4. Determine the impervious surface for all non-single family properties. 9

Process, cont. 5. Determine how to distribute ERUs for multi-family residential. Ø Measured Individually? Ø Standard Ratio? 6. Determine credit system for existing storm water management facilities. 7. Determine incentives for single family residential. 8. Create storm water utility ordinance and rate structure, and set up administrative requirements. 10

Durand Funding Shares 11

Fee Structure Customers will be divided into three classifications: 1. Single Family Residential 2. Full Multiple Residential 3. Nonresidential City of Durand 12

Fee Structure—Single Family Residential The average impervious area for a single family residence, duplex unit, or three-plex unit in the City is approximately 3, 300 square feet. Each residential customer will be charged 1. 0 ERU 13

Fee Structure—Full Multiple Residential Examples: 34, 000 SF/3, 300 SF =10. 3 ERU Full Multiple Residential impervious surfaces will be measured off of aerial photography and divided by 3, 300 SF. Customers will be charged the resultant number of ERUs minus approved credits. 14

Fee Structure—Nonresidential Commercial and Industrial Examples: Left: 207, 800 SF/3, 300 SF =63. 0 ERU Right: 2, 000 SF/3, 300 SF =0. 6 ERU Nonresidential impervious surfaces will be measured off of aerial photography and divided by 3, 300 SF. Customers will be charged the resultant number of ERUs minus approved credits. 15

Fee Structure—Nonresidential Institutional Examples: Left: 238, 236 SF/3, 300 SF =72. 3 ERU Right: 183, 462 SF/3, 300 SF =55. 6 ERU Nonresidential impervious surfaces will be measured off of aerial photography and divided by 3, 300 SF. Customers will be charged the resultant number of ERUs minus approved credits. 16

Total ERU Land Use Impervious Surface ERU Multiple Residential and Nonresidential 3, 816, 934 1, 157 Single Family Residential (3 units or less) 2, 151, 600 652 Total 5, 968, 534 1, 809 17

Rate Calculation Total Budget $130, 250 Total ERU 1, 809 Annual Rate per ERU $72. 00 18

Credit System 10% for modeled sediment removal Credits for Available for Full Multiple Residential and Nonresidential (Commercial, Industrial, Institutional) 10% for modeled runoff volume control 20% maximum credit 19

Storm Water Utility City of Durand Questions? 20