FLOOD10452 ‎(2)‎

• Designation Number: 593
• County: Douglas
• Community: Douglas County and Incorporated Areas
• Title: FIS - Douglas County and Incorporated Areas - Vol 1
• Date: 9/30/2005
• Prepared For: Douglas County
• Prepared By: FEMA
• Floodplain - Doc Type: Current FEMA Regulatory Floodplain Information

FLOOD INSURANCE STUDY
DOUGLAS COUNTY, COLORADO AND INCORPORATED AREAS

1.0 INTRODUCTION

1.1 Purpose of Study

This countywide Flood Insurance Study (FIS) investigates the existence and
severity of flood hazards in, or revises and updates previous FISs/Flood Insurance
Rate Maps (FIRMs) for the geographic area of Douglas County, Colorado,
including: the Towns of Castle Rock, Larkspur, and Parker; the City of Lone Tree;
and the unincorporated areas of Douglas County (hereinafter referred to collectively
as Douglas County).

This FIS aids in the administration of the National Flood Insurance Act of 1968
and the Flood Disaster Protection Act of 1973. This study has developed flood
risk data for various areas of the county that will be used to establish actuarial
flood insurance rates. This information will also be used by Douglas County to
update existing floodplain regulations as part of the Regular Phase of the National
Food Insurance Program (NFIP), and by local and regional planners to further
promote sound land use and floodplain development. Minimum floodplain
management requirements for participation in the NFIP are set forth in the Code
of Federal Regulations at 44 CFR, 60.3.

In some States or communities, floodplain management criteria or regulations
may exist that are more restrictive or comprehensive than the minimum Federal
requirements. In such cases, the more restrictive criteria take precedence and the
State (or other jurisdictional agency) will be able to explain them.

1.2 Authority and Acknowledgments

The sources of authority for this FIS are the National Flood Insurance Act of 1968
and the Flood Disaster Protection Act of 1973.

This FIS was prepared to include the incorporated communities within Douglas
County into a countywide FIS. Information on the authority and
acknowledgements for each jurisdiction included in this countywide FIS, as
compiled from their previously printed FIS reports, is shown below.

Castle Rock, Town of: the hydrologic and hydraulic analyses for the FIS report
dated September 30, 1987, were prepared by Howard,
Needles, Tammen and Bergendoft: for the Federal
Emergency Management Agency (FEMA), under
Contract No. H-4016. That work was completed in
July 1977. The hydrologic and hydraulic analyses for
portions of the streams studied by approximate methods
were performed by J. F. Sato and associates Inc., for
FEMA, under Contract No. 84-C-1631. That work was