1. Storm Water Utility
City of Durand

2. 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.

3. 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.

4. Why Treat Stormwater? Environmental Stewardship. NR 151 NR 216
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.

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

6. 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.

7. 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

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

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

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

11. Durand Funding Shares

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

13. 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

14. 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.

15. Fee Structure—Nonresidential
Commercial and Industrial Examples
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.

16. Fee Structure—Nonresidential
Institutional Examples
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.

17. 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

18. Rate Calculation Rate Calculation Total Budget $130,250 Total ERU
1,809
Annual Rate per ERU
$72.00

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

20. City of Durand Questions?
Storm Water Utility
City of Durand
Questions?