COMPREHENSIVE COMPREHENSIVE FLOODPLAIN FLOODPLAIN

MANAGEMENTMANAGEMENT: : Promoting Wise Uses of Promoting Wise Uses of

FloodplainsFloodplains

CA Department of Water Resources/

CIFMCG Workshop

July July 20062006

Comprehensive Comprehensive Floodplain Floodplain

Management Management WorkshopWorkshopCase StudyCase Study

Workshop ModulesWorkshop Modules Comprehensive FPMComprehensive FPM NFIP OverviewNFIP Overview FPM No Adverse Impact StrategiesFPM No Adverse Impact Strategies Natural Floodplain Functions and Natural Floodplain Functions and

Societal ValuesSocietal Values Flood Management Economic Flood Management Economic

Analysis Analysis Ecosystem Evaluation MethodsEcosystem Evaluation Methods Case StudyCase Study Technical and Financial AssistanceTechnical and Financial Assistance

City of Roseville’s Reason City of Roseville’s Reason Farms Environmental Farms Environmental

PreservePreserve BackgroundBackground

Urban development continues to occur in the Urban development continues to occur in the Pleasant Grove Creek drainage areaPleasant Grove Creek drainage area

Pleasant Grove Creek drains almost half of Pleasant Grove Creek drains almost half of Roseville’s land area (16 of 32 square miles)Roseville’s land area (16 of 32 square miles)

Pleasant Grove Creek flows west through Pleasant Grove Creek flows west through Sutter County, much of which is in a Sutter County, much of which is in a floodplainfloodplain

Sutter County has opposed increases in Sutter County has opposed increases in storm water runoff caused by upstream storm water runoff caused by upstream developmentdevelopment

City of Roseville’s Reason City of Roseville’s Reason Farms Environmental Farms Environmental

PreservePreserve BackgroundBackground

The increase in the 100-year storm water The increase in the 100-year storm water surface elevation in Sutter County caused surface elevation in Sutter County caused by upstream development in south Placer by upstream development in south Placer County is estimated to be about 1.2 inchesCounty is estimated to be about 1.2 inches

Development in Roseville contributes less Development in Roseville contributes less than 0.25 inchthan 0.25 inch

In 1991 Roseville adopted a developer-In 1991 Roseville adopted a developer-paid drainage fee which has so far raised paid drainage fee which has so far raised $13 million$13 million

City of Roseville’s Reason City of Roseville’s Reason Farms Environmental Farms Environmental

PreservePreserve

BackgroundBackground Roseville gave Sutter County the choice Roseville gave Sutter County the choice

of either taking the money and building of either taking the money and building their own flood management facilities their own flood management facilities or or the City would build its own the City would build its own retention facilityretention facility

Sutter County decided to let Roseville Sutter County decided to let Roseville build its own facilitybuild its own facility

City of Roseville’s Reason City of Roseville’s Reason Farms Environmental Farms Environmental

PreservePreserve Proposed ProjectProposed Project

Project to be constructed on about Project to be constructed on about 1,750 acres of farmland and open space 1,750 acres of farmland and open space downstream of Rosevilledownstream of Roseville

Primary project purposes: flood Primary project purposes: flood management, ecosystem restoration management, ecosystem restoration and recreationand recreation

Total project cost is about $20 - $27 Total project cost is about $20 - $27 millionmillion

City of Roseville’s Reason City of Roseville’s Reason Farms Environmental Farms Environmental

PreservePreserve Flood ManagementFlood Management

Mitigate all downstream water surface Mitigate all downstream water surface increases resulting from development in increases resulting from development in the Pleasant Grove drainage basin in the Pleasant Grove drainage basin in RosevilleRoseville

Two retention basins (about 2,500 AF Two retention basins (about 2,500 AF combined storage capacity)combined storage capacity)

Estimated frequency of storing water in Estimated frequency of storing water in the basins is estimated to be once every the basins is estimated to be once every 15 to 30 years15 to 30 years

City of Roseville’s Reason City of Roseville’s Reason Farms Environmental Farms Environmental

PreservePreserve

Ecosystem RestorationEcosystem Restoration WetlandsWetlands Vernal poolsVernal pools Swanson hawk habitatSwanson hawk habitat

City of Roseville’s Reason City of Roseville’s Reason Farms Environmental Farms Environmental

PreservePreserve RecreationRecreation

35 acre lake for non-motorized boating 35 acre lake for non-motorized boating and fishingand fishing

Outdoor adventure area (climbing Outdoor adventure area (climbing obstacle courses, archery and mountain obstacle courses, archery and mountain bike training)bike training)

Pedestrian/bicycle/equestrian trailsPedestrian/bicycle/equestrian trails Picnic areasPicnic areas CampgroundCampground

City of Roseville’s Reason City of Roseville’s Reason Farms Environmental Farms Environmental

PreservePreserve

RevenuesRevenues In addition to developer fees, revenue In addition to developer fees, revenue

will be generated from boat rentals, will be generated from boat rentals, campground fees, equestrian facility campground fees, equestrian facility leases, and a native plant nurseryleases, and a native plant nursery

Annual non-developer revenues are Annual non-developer revenues are estimated to be about $514,000estimated to be about $514,000

City of Roseville’s Reason City of Roseville’s Reason Farms Environmental Farms Environmental

PreservePreserve Project StatusProject Status

About $13 million has been collected to About $13 million has been collected to date in developer-paid feesdate in developer-paid fees

CEQA documentation completed January CEQA documentation completed January 20032003

Land purchased in 2004Land purchased in 2004 South retention basin to be constructed South retention basin to be constructed

in 2010in 2010 North retention basin to be constructed North retention basin to be constructed

in 2017in 2017

To Summarize…To Summarize…

Project AccomplishmentsProject Accomplishments Watershed-based solution to urban Watershed-based solution to urban

flood problemsflood problems Incorporates multiple-objectivesIncorporates multiple-objectives Equitable finance plan (developers/new Equitable finance plan (developers/new

residents pay to mitigate for increases residents pay to mitigate for increases in downstream flooding)in downstream flooding)

Creates other revenue sourcesCreates other revenue sources

More info? ContactMore info? Contact Mike Shellito, City of RosevilleMike Shellito, City of Roseville

MShellito@roseville.ca.usMShellito@roseville.ca.us

What’s Next?What’s Next?

Sources of technical and financial Sources of technical and financial assistanceassistance