Ann Arbor logo
Share to Facebook Share to Twitter Bookmark and Share
File #: 20-1629    Version: 1 Name: 12/7/20 - ORD - UDC Floodplain Overlay
Type: Ordinance Status: Passed
File created: 12/7/2020 In control: City Council
On agenda: 1/4/2021 Final action: 1/4/2021
Enactment date: 12/7/2020 Enactment #: ORD-20-33
Title: An Ordinance to Add Sections 5.14.2 And 5.27 And Amend Sections 5.18.4, 5.18.6.D, 5.23.4, 5.29.1, 5.29.3.F, 5.29.8.C, 5.29.12.D, 5.37.2.B, 5.37.2.C, 5.37.2.F, 5.37.2.L, 5.37.2.N, 5.37.2.M, And 5.37.2.S of Chapter 55 (Unified Development Code) of Title V of the Code of the City of Ann Arbor (Floodplain Management Overlay District and Regulations)
Sponsors: Christopher Taylor
Attachments: 1. ORd-20-33 Briefed and Approved.pdf, 2. ORD-20-33 Briefed.pdf, 3. Floodplain Management Overlay District Proposal Oct 2020 CPC.pdf, 4. FloodplainORD-Council1.pdf, 5. Floodplain Management Overlay District Proposal Oct 2020 CPC.pdf
Related files: 20-0527, 21-0053
Title
An Ordinance to Add Sections 5.14.2 And 5.27 And Amend Sections 5.18.4, 5.18.6.D, 5.23.4, 5.29.1, 5.29.3.F, 5.29.8.C, 5.29.12.D, 5.37.2.B, 5.37.2.C, 5.37.2.F, 5.37.2.L, 5.37.2.N, 5.37.2.M, And 5.37.2.S of Chapter 55 (Unified Development Code) of Title V of the Code of the City of Ann Arbor (Floodplain Management Overlay District and Regulations)
Memorandum
Section 5.24.4 of the Unified Development Code (UDC) currently regulates 100 Year Floodplains. Throughout Ann Arbor, floodplain areas are approximately 10% of the total city land area. This set of proposed amendments is intended to both modify and expand floodplain regulations throughout the City to accomplish the following benefits:

? To improve safety and welfare of both people and property.
? To provide clear permitting and review expectations.
? To apply existing State-level floodplain regulations across all floodplains in the City.
? To lower flood insurance rates for City property owners.

The last benefit is achieved through incorporation of many Community Rating System best practice approaches into the proposed ordinance. There are numerous aspects to the proposed additions and modifications to the Unified Development Code here, including:

* Terminology updates - Shifting from past references in favor of current conventions that refer to risk factors by percentage (e.g. 1% Annual Chance vs. 100-year floodplain, 0.2% Annual Chance vs. 500-year floodplain).

* Extends State-level regulations to areas not currently regulated.

* Modifications to Floodway Development regulations:
* Extends current prohibition of new residential buildings to no new buildings of any use.
* No new parking where depth is greater than two feet.
* Provides some exemption for redevelopment for parcels with existing buildings in a floodway.
* No new accessory structures.

* Modifications to Flood Fringe Development regulations:
* Adds prohibition of Critical Facilities from development in Flood Fringe.
* Prohibits stru...

Click here for full text