City Council Meeting - FINAL


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  11.C.       
Meeting Date: 11/15/2022  
Co-Submitter: Brad Hill From: Edward Schenk, Water Services Manager - Stormwater

Information
TITLE:
Consideration and Adoption of Resolution No. 2022-54:  A resolution adopting the 2023 Revised Stormwater Credit Manual.
STAFF RECOMMENDED ACTION:
1) Read Resolution No. 2022-54 by title only for the final time
2) City Clerk reads Resolution No. 2022-54 by title only (if approved above)
3) Adopt Resolution No. 2022-54
Executive Summary:
The most recent Stormwater Credit Manual was instituted in 2015. No amendments have been made since.

A detailed review of the Stormwater Credit Manual revealed potential inconsistencies with the original intent of the manual. Concerns exist about the current Stormwater Credit Manual's provision of incentives to Flagstaff residents. The intent of this agenda item is to provide Council with the opportunity to adopt the 2023 Revised Stormwater Credit Manual. 
Financial Impact:
There are no direct costs of implementing a revision of the Stormwater Credit Manual. Indirect impacts to the financial inflow to the Stormwater Utility through credits to individual accounts, usually in the 10% credit range. Staff do not recommend a large indirect financial impact since there is an existing Credit Manual that was a revision of the original 2006 Credit Manual. Staff does not expect a large change in applications for credits.
Policy Impact:
The most recent Stormwater Credit Manual went into effect in 2015. It is a revised version of the original Stormwater Credit Manual of 2006 and was intended to provide incentives to businesses and property owners to "go above and beyond" in their private stormwater infrastructure. The current Stormwater Credit Manual contains language that could pose possible concerns with its application. The subject of revising the Stormwater Credit Manual was briefly mentioned to Council as part of the initial City Council discussions related to the Stormwater Rate Study. Additionally, this item was formally presented to the Water Commission in September. A summary of the proposed changes are below and are also in the attached draft updated Stormwater Credit Manual. If the draft document is accepted by Council it will be put forward in ordinance form with the required two public reads at future regular City Council Meetings. 
 
Stormwater Detention:
 
In particular: the current Stormwater Credit Manual provides a 20% credit for detention of the 2, 10 and 100 year events. This must be clarified as these standards are required by current code.
 
The Stormwater Credit Manual provides a 9% credit for meeting detention code of the 1990s. This must be clarified to be consistent with the current detention requirements of the updated/current drainage code.
 
Staff recommends removing both credits and replacing with a 10% credit for detention basins that provide detention beyond current code. Specifically a detention requirement for a 500-year event.
 
Residential Water Harvesting:
 
The Stormwater Credit Manual currently provides a 10% credit for a minimum of 2 rain barrels with a combined capacity of 100 gallons on a residential property. Staff recommends this be changed to a minimum of 300 gallons of on-site residential rainwater harvesting. This change is intended to show a real benefit in terms of rainwater runoff reduction while not being too difficult to obtain for a typical property owner.
 
Conservation Easement:
 
The Stormwater Credit Manual provides a 10% credit for a minimum of 10 contiguous acres of conservation easement. This requirement will be hard to meet within City limits as open parcels become more rare, and more expensive. It is recommended that this be changed to 2 contiguous acres of conservation easement for the 10% credit.
 
Structured Educational Program:
 
No change.
 
Additional change to the Credit Manual:
 
Addition of a section for floodproofing, provide a 10% credit for "wet" or "dry" floodproofing of the primary structure(s) on a parcel.
Connection to PBB Priorities/Objectives, Carbon Neutrality Plan & Regional Plan:
Priority Based Budget Key Community Priorities and Objectives
High performance governance: Serve the public by providing high quality internal and external customer service (SP)1.2/ 3.2/ (RP)ED.1
Safe & Healthy Community: Foster a safe, secure, and healthy community (SP)3.4/ 4.1/ (RP)PF.1/ PF.3
Sustainable, Innovative Infrastructure: Deliver outstanding services to residents through a healthy, well maintained infrastructure system (SP)3.2/ (RP)PF.2/ E.1-2/ WR.1-6/ LU.7-8/ CD.1/ T.4-6/ REC.1
Environmental Stewardship: Implement sustainable building practices and alternative energy and transportation options (RP)E&C.6/ E.1-2/ WR.3/ PF.2/ REC.1/ LU.5/ LU.10/ LU.13-14/ LU.18/ T.3-7/ E&C.2
 
Carbon Neutrality Plan
Community resilience, CR-1 and CR-2

Regional Plan
Goal E&C.3. Strengthen community and natural environment resiliency through climate adaptation efforts.

Goal WR.5. Manage watersheds and stormwater to address flooding concerns, water quality, environmental protections, and rainwater harvesting.

Goal ED.1. Create a healthy environment for business by ensuring transparent, expeditious, and predictable government processes.
Has There Been Previous Council Decision on This:
Yes, the previous Credit Manual was adopted via Resolution No. 2015-17.
Options and Alternatives:
Alternative: do not adopt a revision of the Credit Manual and continue with the 2015 Credit Manual.
Background/History:
The original credit manual was created in 2006 and revised in 2015. The current credit manual provides inequities through giving credits for developments that meet current standards while penalizing older neighborhoods that were built to old standards. The intent of a Stormwater Credit Manual is to incentivize private development and improvements that go beyond current standards.
Key Considerations:
The most recent Stormwater Credit Manual went into effect in 2015. It is a revised version of the original Stormwater Credit Manual of 2006 and was intended to provide incentives to businesses and property owners to "go above and beyond" in their private stormwater infrastructure. The current Stormwater Credit Manual contains language that could pose possible concerns with its application. The subject of revising the Stormwater Credit Manual was briefly mentioned to Council as part of the initial City Council discussions related to the Stormwater Rate Study. Additionally, this item was formally presented to the Water Commission in September. A summary of the proposed changes are below and are also in the attached draft updated Stormwater Credit Manual. If the draft document is accepted by Council it will be put forward in ordinance form with the required two public reads at future regular City Council Meetings. 
 
Stormwater Detention:
 
In particular: the current Stormwater Credit Manual provides a 20% credit for detention of the 2, 10 and 100 year events. This must be clarified as these standards are required by current code.
 
The Stormwater Credit Manual provides a 9% credit for meeting detention code of the 1990s. This must be clarified to be consistent with the current detention requirements of the updated/current drainage code.
 
Staff recommends removing both credits and replacing with a 10% credit for detention basins that provide detention beyond current code. Specifically a detention requirement for a 500-year event.
 
Residential Water Harvesting:
 
The Stormwater Credit Manual currently provides a 10% credit for a minimum of 2 rain barrels with a combined capacity of 100 gallons on a residential property. Staff recommends this be changed to a minimum of 300 gallons of on-site residential rainwater harvesting. This change is intended to show a real benefit in terms of rainwater runoff reduction while not being too difficult to obtain for a typical property owner.
 
Conservation Easement:
 
The Stormwater Credit Manual provides a 10% credit for a minimum of 10 contiguous acres of conservation easement. This requirement will be hard to meet within City limits as open parcels become more rare, and more expensive. It is recommended that this be changed to 2 contiguous acres of conservation easement for the 10% credit.
 
Structured Educational Program:
 
No change.
 
Additional change to the Credit Manual:
 
Addition of a section for floodproofing, provide a 10% credit for "wet" or "dry" floodproofing of the primary structure(s) on a parcel.
Community Benefits and Considerations:
The benefit of revising the Credit Manual is providing options for reducing the community's Stormwater utility rate through incentivizing activities that reduce flood risks at a local level.
Community Involvement:
The proposed revisions to the Stormwater Credit Manual was brought to Water Commission in August and September and to City Council for discussion on November 1st, 2022.
Attachments
Res. 2022-54
2023 Draft Credit Manual
2015 Credit Manual


    

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