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

Comprehensive Floodplain Management Workshop Case Study

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

City of Roseville’s Reason Farms Environmental Preserve Background 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

City of Roseville’s Reason Farms Environmental Preserve Background 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

City of Roseville’s Reason Farms Environmental Preserve Background 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

City of Roseville’s Reason Farms Environmental Preserve Proposed Project 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

City of Roseville’s Reason Farms Environmental Preserve Flood Management 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

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

City of Roseville’s Reason Farms Environmental Preserve Recreation 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

City of Roseville’s Reason Farms Environmental Preserve Revenues 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

City of Roseville’s Reason Farms Environmental Preserve Project Status 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

To Summarize… Project Accomplishments 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

More info? Contact More info? Contact  Mike Shellito, City of Roseville

What’s Next? Sources of technical and financial assistance Sources of technical and financial assistance