COMPREHENSIVE FLOODPLAIN MANAGEMENT : Promoting Wise Uses of Floodplains

1. CA Department of Water Resources/ CIFMCG Workshop COMPREHENSIVE FLOODPLAIN MANAGEMENT: Promoting Wise Uses of Floodplains July 2006

2. Comprehensive Floodplain Management Workshop Case Study

3. Workshop Modules • Comprehensive FPM • NFIP Overview • FPM No Adverse Impact Strategies • Natural Floodplain Functions and Societal Values • Flood Management Economic Analysis • Ecosystem Evaluation Methods • Case Study • Technical and Financial Assistance

4. City of Roseville’s Reason Farms Environmental Preserve • Background • Urban development continues to occur in the Pleasant Grove Creek drainage area • Pleasant Grove Creek drains almost half of Roseville’s land area (16 of 32 square miles) • Pleasant Grove Creek flows west through Sutter County, much of which is in a floodplain • Sutter County has opposed increases in storm water runoff caused by upstream development

5. City of Roseville’s Reason Farms Environmental Preserve • Background • The increase in the 100-year storm water surface elevation in Sutter County caused by upstream development in south Placer County is estimated to be about 1.2 inches • Development in Roseville contributes less than 0.25 inch • In 1991 Roseville adopted a developer-paid drainage fee which has so far raised $13 million

6. City of Roseville’s Reason Farms Environmental Preserve • Background • Roseville gave Sutter County the choice of either taking the money and building their own flood management facilities or the City would build its own retention facility • Sutter County decided to let Roseville build its own facility

7. City of Roseville’s Reason Farms Environmental Preserve • Proposed Project • Project to be constructed on about 1,750 acres of farmland and open space downstream of Roseville • Primary project purposes: flood management, ecosystem restoration and recreation • Total project cost is about $20 - $27 million

8. City of Roseville’s Reason Farms Environmental Preserve • Flood Management • Mitigate all downstream water surface increases resulting from development in the Pleasant Grove drainage basin in Roseville • Two retention basins (about 2,500 AF combined storage capacity) • Estimated frequency of storing water in the basins is estimated to be once every 15 to 30 years

9. City of Roseville’s Reason Farms Environmental Preserve • Ecosystem Restoration • Wetlands • Vernal pools • Swanson hawk habitat

10. City of Roseville’s Reason Farms Environmental Preserve • Recreation • 35 acre lake for non-motorized boating and fishing • Outdoor adventure area (climbing obstacle courses, archery and mountain bike training) • Pedestrian/bicycle/equestrian trails • Picnic areas • Campground

11. City of Roseville’s Reason Farms Environmental Preserve • Revenues • In addition to developer fees, revenue will be generated from boat rentals, campground fees, equestrian facility leases, and a native plant nursery • Annual non-developer revenues are estimated to be about $514,000

12. City of Roseville’s Reason Farms Environmental Preserve • Project Status • About $13 million has been collected to date in developer-paid fees • CEQA documentation completed January 2003 • Land purchased in 2004 • South retention basin to be constructed in 2010 • North retention basin to be constructed in 2017

14. To Summarize… • Project Accomplishments • Watershed-based solution to urban flood problems • Incorporates multiple-objectives • Equitable finance plan (developers/new residents pay to mitigate for increases in downstream flooding) • Creates other revenue sources

15. More info? Contact • Mike Shellito, City of Roseville MShellito@roseville.ca.us

16. What’s Next? • Sources of technical and financial assistance