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Storm Water UtilityCity of Durand

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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.

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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.

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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.

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Storm Water Funding Sources

Two primary methods of raising funds to install, support, and improve storm water systems:

• Property Taxes

• Storm Water Utility

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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.

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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

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Eligible Utility Costs

• Construction of storm water ponds.

• Maintenance of storm sewers.

• Maintenance of ponds.

• Street sweeping.

• Leaf collection.

• Erosion stabilization.

• Administrative costs.

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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.

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Process, cont.

5. Determine how to distribute ERUs for multi-family residential.

Measured Individually? 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.

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Durand Funding Shares

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Budget

Proposed Budget Summary

Wages and Benefits $27,000

Operating Expenses $5,000

Equipment $6,600

Outlay $26,500

Total Proposed Budget $65,100

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Fee Structure

City of Durand

Customers will be divided into three classifications:

1. Single Family Residential

2. Full Multiple Residential

3. Nonresidential

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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

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Fee Structure—Full Multiple Residential

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.

Examples:

34,000 SF/3,300 SF

=10.3 ERU

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Fee Structure—Nonresidential

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.

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

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Fee Structure—Nonresidential

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.

Institutional Examples

Examples:

Left:

238,236 SF/3,300 SF

=72.3 ERU

Right:

183,462 SF/3,300 SF

=55.6 ERU

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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

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Rate Calculation

Rate Calculation

Total Budget $65,100

Total ERU 1,809

Annual Rate per ERU $36.00

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Regional Examples

Community Annual Cost/ERU

Altoona $36.00

Barron $24.00

Chetek $27.00

Chippewa Falls $36.00

Eau Claire $62.00

Grantsburg $18.00

Menomonie $32.00

New Richmond $28.68

River Falls $37.68

Superior $70.80

Washburn $48.00

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Credit System

Credits for Available for Full

Multiple Residential and Nonresidential (Commercial,

Industrial, Institutional)

10% for modeled sediment removal

10% for modeled runoff volume control

20% maximum credit

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Proposed Implementation Schedule

Task Month

Review and Finalize Data May, 2010

Public Informational Meeting July, 2010

Adopt Summary of Charges July, 2010

Final Ordinance Approval August, 2010

Create Utility August, 2010

First Monthly Billing Begins September, 2010

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Storm Water UtilityCity of Durand

Questions?