Board Meeting 05/20/2002

• Board Meeting Date: 5/20/2002
• Description: Flood Section - Consent Agenda - Floodplain Information to be Designated or Rescinded
• Board Meetings - Doc Type: Memo

STATE OF COLORADO

Colorado Water Conservation Board
Department of Natural Resources
1313 Shennan Street, Room 721
Denver, Colorado 80203
Phone: [phone]
FAX, [phone]
www.cwcb.state.co.us

Bill Owens
GovetTlor

MEMORANDUM

Greg E. Walcher
Executive
Director

TO: Colorado Water Conservation Board Members

Rod Kuharich
Director

FROM:

Lany Lang, Chief, Flood Protection Section
Tom Browning, P.E., Flood Protection Section

Dan McAuliffe
Deputy Director

DATE: May 9, 2002

SUBJECT: Consent Agenda Items 3.a through 3.e
May 20-21, 2002 Board Meeting
Flood Protection Section - Floodplain Information to Be Designated

SUMMARY

Consent Agenda Items 3.a through 3.e include fiye floodplain studies/maps proposed for CWCB
action. Staff is requesting Board designation and approyal for these items. A brief summary of the
studies is presented below.

CWCB staff performs teclmical reyiews of floodplain information to assure the Board that the
information is in compliance with the requirements of the CWCB's "Rules and regulations for the
designation and approyal of floodplains and of storm or floodwater runoff channels in Colorado," 2
CCR 408-1. Furthermore, Sections 31-23-301 and 30-28-111, Colorado Reyised Statutes, state that
legislatiye bodies of local jurisdictions may proyide zoning regulations for land uses on or along any
storm or floodwater runoff channel or basin only after designation and approyal by the CWCB. In
addition, Section 37-60-106(1)(c), Colorado Reyised Statutes, directs the CWCB to designate and
approye storm or floodwater runoff channels or basins and to make such designations ayailable to
legislatiye bodies of local jurisdictions.

The CWCB's designation and approyals greatly assist local commumt1es in meeting the statutory
requirements of the State and the regulatory requirements of the National Flood Insurance Program.
Floodplain information is broadly categorized as detailed or approximate using the following
defmitions. Detailed floodplain information means floodplain information prepared using topographic
base maps, hydrologic analyses, and hydraulic calculations to arriye at precise water surface profiles
and floodplain delineations suitable for making land use decisions under statutorily authorized zoning