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File #: 20-0488    Version: 1 Name: 5/4/20 Stormwater Rates - Ordinance Amendment Chapter 29
Type: Ordinance Status: Passed
File created: 5/4/2020 In control: City Council
On agenda: 5/18/2020 Final action: 5/18/2020
Enactment date: 5/4/2020 Enactment #: ORD-20-16
Title: An Ordinance to Amend Section 2:69 of Chapter 29 (Stormwater Rates) of Title II of the Code of the City of Ann Arbor (Ordinance No. ORD-20-16)
Attachments: 1. ORD-20-16 Sewer Rates Ordinance Briefed and Approved.pdf, 2. ORD-20-16 Storm_Ordinance_FY21 Briefed.pdf, 3. Storm Ordinance FY21.pdf, 4. ORD-20-16 Sewer Rates Approval Notice.pdf


An Ordinance to Amend Section 2:69 of Chapter 29 (Stormwater Rates) of Title II of the Code of the City of Ann Arbor (Ordinance No. ORD-20-16)


Your approval is requested to amend Section 2:69 of Chapter 29 of Title II of the Code of the City of Ann Arbor to increase stormwater fees for upcoming operating and capital needs. The increased rates will help finance the completion of the four-year phased roll in of the level of service increases which began in 2017.  The final phase of the level of service increases to be implemented this year for the televising of the stormwater conveyance system (on-going $650,000.00/year).  Prior to this fiscal year, services that have started and remain ongoing include; green infrastructure maintenance, implementation of best management practices, increased education and outreach as well as other maintenance and rehabilitation in the stormwater system.  


In addition, the revenue requirements driving this increase will be used for capital expenditures required to maintain and rehabilitate the stormwater infrastructure, including lining and other major capital projects associated with the aging infrastructure in the City.  The stormwater fund also has planned accumulation of fund balance for some large projects required to control flood risks in areas around the City. 


The revenue requirement increase of 11% is projected to increase revenues to the Stormwater Disposal System by $1,250,132.00.


City Customers are billed in conjunction with the sewer and water utility.  The increase for the stormwater portion of a customer’s bill is an estimated $5.55 per quarter, or $22.20 annually.  For the purposes of this comparison, the bill is calculated as a residential customer, in the second tier of the fee structure with billable impervious area between 2,187 and 4,175 ft2.  The early payment discount (10%) is not included in this calculation.


Prepared by:                       Marti Praschan, Chief of Staff, Public Services

Reviewed by:  Craig Hupy, Public Services Area Administrator

Approved by:                       Tom Crawford, Interim City Administrator.




First Reading:                     May 4, 2020                                                                                    Approved:                     May 18, 2020

Public Hearing:                     May 18, 2020                                                               Published:                     May 21, 2020

                                                                                                                                                                        Effective:                     July 1, 2020


Water, Sewer and Stormwater Rates




The City of Ann Arbor ordains:


Section 1. That Sections 2:69 of Chapter 29 of Title II of the Code of the City of Ann Arbor be amended to read as follows:



2:69. - Stormwater rates.


(1)                     Except as provided in this section and Chapter 33, all property shall be subject to the stormwater utility charge.


(2)                     Stormwater Discharge Rate. Each property shall be billed at a quarterly stormwater discharge rate of $851.44 per acre multiplied by the representative impervious area of the property. The representative impervious area of the property shall be the measured impervious area, rounded to the nearest 0.0001 acre, of the portion of the property discharging to the city's stormwater system.

(3)                     Properties with a single-family dwelling, a two-family dwelling, or a single-family dwelling with an accessory dwelling unit, all as defined in Chapter 55, are grouped into the following categories for purposes of calculating stormwater charges based upon their measured and representative impervious area:


Single-Family and Two-Family Residential

Measured Impervious Area

Representative Impervious Area

Quarterly Charge

Less than or equal to 2,187 square feet

0.03706 acres


Greater than 2,187 square feet to less than or equal to 4,175 square feet

0.06486 acres


Greater than 4,175 square feet to less than or equal to 7,110 square feet

0.11117 acres


Greater than 7,110 square feet

0.19456 acres



(4) Customer Charge . Each property shall be billed a customer charge of $4.15 per quarter.


(5) Credits to Stormwater Discharge and Customer Charges. The city shall offer the following credits per quarter to property owners fully satisfying pertinent criteria established in Chapter 33 and in regulations promulgated by the Administrator:


Single-Family and Two-Family Residential

Reduce Total Charge by

Rain barrels (1 or more)


Rain gardens/cisterns/dry wells


RiverSafe homes


Chapter 63-Compliant stormwater control



 Other Properties

Reduce Stormwater Discharge Rate by

Reduce Customer Charge by

Community Partners for Clean Streams



Chapter 63-Compliant Stormwater Control



Other Approved Stormwater Controls




(5) Charges for Permitted Non-Stormwater Discharges. The charges for non- stormwater discharges to the stormwater system that are permitted by the Public Services Area Administrator according to chapter 33, section 2:217, shall be

$1.75 per 1,000 gallons. If non-stormwater discharges to the stormwater system are controlled such that the discharges cease during periods of precipitation, then the above rate shall be multiplied by a factor of 0.3. For any month in which the user discharges into the stormwater system, there shall be a minimum bill for 100,000 gallons. Stormwater discharges exempt from discharge prohibitions under section 2:216(3) are not subject to this charge.


Section 2. That this ordinance shall take effect on July 1, 2020.




I hereby certify that the foregoing ordinance was adopted by the Council of the City of Ann Arbor, Michigan at its regular session of May 18, 2020.







                                                                                                                              Jacqueline Beaudry, Ann Arbor City Clerk



Christopher Taylor, Mayor



I hereby certify that the foregoing ordinance received legal publication on the City Clerk’s webpage on May 21, 2020.




                                                                                                                              Jacqueline Beaudry, Ann Arbor City Clerk