Managing Stormwater Through Improved Zoning Codes. Our Goal for Today. Increase Awareness: Local flooding can be reduced, and you can help Introduce New Concepts: Zoning code changes that include Best Management Practices can help reduce runoff Give You a Head Start:
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Local flooding can be reduced, and you can help
Introduce New Concepts:
Zoning code changes that include Best Management Practices can help reduce runoff
Give You a Head Start:
Assist communities to comply with NPDES Phase II Permit. Provide specific examples of how to retrofit your local zoning code
15 WORST FLOODS IN CINCINNATI
Spring Grove Cemetery -1937
TAFT ASKS PRESIDENT BUSH FOR DISASTER DECLARATION FOR MID-JULY FLOODING IN BROWN, BUTLER, CLERMONT AND HAMILTON COUNTIESCOLUMBUS (August 16, 2001) – Gov. Bob Taft today asked the president to declare four southwest Ohio counties disaster areas because of an estimated $7.7 million in damages and costs to local and state government agencies due to flooding in mid-July.
“I have determined this incident, in concert with previous 12 month state disaster expenditures, now exceeds $12 million and is of such severity and magnitude that it exceeds the capabilities of the voluntary agencies, local and state government to recover,” wrote Taft in his letter to the president.
If granted, local governments in Brown, Butler, Clermont and Hamilton counties as well as the state departments of Natural Resources and Transportation, would be eligible for partial federal reimbursement for their costs and expenditures during their response to and recovery from the mid-July floods.
Taft also pledged in his letter that the state will assist local governments by paying up to one-half their share of any federal assistance. Generally, presidential declarations of a major disaster pledge the federal government to reimburse up to 75 percent of local expenditures.
Estimates of flood damage were prepared by state, federal and local emergency management agency personnel last week: Brown County, $586,000; Butler County, $1.5 million; Clermont County, $1.8 million, and Hamilton County, $3.7 million.
State government’s estimated costs from the southwest Ohio flooding included $37,000 for use of Civilian Conservation Corps personnel clearing debris at 25 separate sites in Clermont County and an additional $245,000 in ODOT personnel costs for the work of six separate work crews ….
Estimates of flood damage were prepared by state, federal and local emergency management agency personnel last week:
Brown County $586,000
Butler County $1.5 million
Clermont County $1.8 million
Hamilton County $3.7 million
Source is a News Release from the Ohio Governors office on August 16, 2001
Source Control Best Management Practices
A design solution that allows stormwater to seep into the ground before it can run off
Any hard surfaced, man-made area that does not readily absorb water
Source: Federal Interagency Stream Restoration Working Group, 1998
Some communities do not require site plan review…
But, they can.
Brentwood Plaza July 2003, prior to redevelopment
Brentwood Plaza September 2005, after redevelopment
Hamilton County Zoning Code, 2005
Courtesy of HCRPC 2005
Center for Watershed Protection, 2002
937.05 C. Widths of Setbacks
Center for Watershed Protection, 2002
Summit County, OH Zoning Code, 2002
Cluster Example – Ham. Co. Zoning Resolution, Chapter 4
The minimum number of trees and shrubs for interior landscaping areas shall be calculated as follows:
Required parking: 1 tree & 3 shrubs per 15 parking spaces or fraction thereof.
Parking in excess of code requirement: 2 trees & 6 shrubs per 15 parking spaces or fraction thereof.
Zoning Resolution, Colerain Township
“…when a parking space or spaces abut a landscaped area, grassy strip, or yard, a maximum of two feet of the overall length (20 SF) of
any such space or
spaces may extend
into the landscaped
area, grassy strip or
City of Wyoming Zoning Code
“…minimum 4 spaces, maximum 6.5 spaces for each 1,000 SF of retail building.”
City of Montgomery Zoning Code
Ridgewater Plaza on Highland Ave. Photo courtesy of CAGIS
Source: Anderson Township Zoning Resolution, 2004; Fig. 145-B
A portion of the required spaces may remain landscaped and unpaved or paved with pervious pavers provided that the parking and unpaved areas currently is deemed unrequired.
Anderson Township Zoning Resolution, 2004; Sec. 145
Source: Anderson Township Zoning Resolution, 2004; Fig. 145-C
“Shared parking is encouraged and permitted if the multiple uses that the shared parking will benefit can cooperatively establish and operate the facilities.”
Anderson Township Zoning Resolution, 2004; Sec. 145 (D)(2)(a)
Rhode Island Urban Environmental Design Manual, 2005
In other communities, the incentive is reduced time to get a permit. Chicago will cut the time in half to get a building permit if the building design has a greenroof.
Floor Area Ratio Bonus refers to a formula that allows builders to increase their floor area ratio in exchange for either a greenroof or porous pavement. The square footage permitted for the exchange depends on the particular zoning code. Examples are found in Portland, OR, and Minneapolis, MN, zoning codes.
Alberici's headquarters, St. Louis, MO
Heritage Park - Colerain Township, OH
Source: Watershed Management Institute (WMI). 1997. Operation, Maintenance, and Management of Stormwater Management Systems. Prepared for: US EPA Office of Water. Washington, DC.
Northern Kentucky Sanitation District No. 1
Source: The Stormwater Manager’s Resource Center - http://www.stormwatercenter.net/
Photos taken by Christine Baeumler
Layers of growing medium and plants on top of traditional roofing system
Michigan State University
Chicago City Hall
Atlanta City Hall
Minnesota Urban Small Sites BMP Manual
Fencing Academy of Philadelphia
Seattle Justice Center
Ford Motor Company’s Rouge Plant in Dearborn, MI is the second largest greenroof, at 10 acres
Carrabba’s in Greensboro, NC
Why the Need for Protection?
Great Miami River floodplain
in Miamitown –
Would you park over here?????
Source of stream meander photo: http://www.paleocurrents.com/castle_rock/docs/meandering_river.html.
Source: USEPA Preliminary Summary of Urban Storm Water BMPs, August 1999.
Note: 1991 and 1997 costs increased by rate of inflation to reflect 2005 typical costs of BMPs in southwest Ohio.
Associated with Water Quality Improvements
Educate your commission, your council and your community about the possibilities of using your zoning code to reduce stormwater runoff and potential flooding.
Introduce New Concepts:
Promote the use Stormwater Source Control BMP’s among builders and property owners to reduce flooding in your community.
Get a Head Start:
Make changes to your zoning code to incorporate stormwater management practices that will reduce run off at the source.
Stormwater is a resource, and it is up to each community to manage it to prevent flooding!
Stormwater Zoning Code Project
Brian Bohl – Hamilton County Soil & Water Conservation District
Nancy Ellwood – Mill Creek Watershed Council
Joanne Gerson – City of Montgomery
Todd Kinskey – Hamilton County Regional Planning Commission
Catalina Landivar – Hamilton County Regional Planning Commission
Terry Vanderman – City of Wyoming
Marc Beechuk – Hamilton County Regional Planning Commission
Bethany Hahn – Hamilton County Regional Planning Commission
Mike Harbison – City of Montgomery
Janet Keller - OKI
Amy Pursley – TEC Engineering
Susan Roschke – TEC Engineering
Tom Stahlheber – Delhi Township
Chandrima Pal – Graduate Student, University of Cincinnati