FLOOD01124

• County: Boulder
• Stream Name: South Boulder Creek
• Title: South Boulder Creek/ Flatirons
• Date: 12/5/1997
• Prepared For: Boulder
• Prepared By: Consultants
• Floodplain - Doc Type: Community File

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Board of Directors

I Executive Committee:

Cathy Reynolds ~
Chairman <:0
City of Denver 8
Unda Morton 5
Chairman Pfo.. Tem 5:
City of Lakewood u.
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Robert A. ChriStensen ~
Secretary as
Douglas County a
John Stone
Treasurer ~
Jefferson County as
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Dennis Reynolds ~
Member '<0
City of Littleton ~
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Members: ~

Carolyn Buchholz a:l
City of Lafayette ~
Margaret Carpenter ~
City of Thornton ~
Paul Danish
Sou"" County
Bill Himmelmann ~
eiry of Denver ~
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B. H. Hoffmaster ~
Engineer ><;
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Fidet Montoya u.;
City of Denver .
Edna Mosley ~
City of Aurora :h
Deborah Ortega ~
City of Denver ~
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Art Panon a
Engineer .s:
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Mary Poe ~
Town 01 Morrison I-
Elaine Valente
Adams County
Debra Vickrey
Arapahoe County

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RECEIVED
JUN 1 2 1997

L Scott Tucker, Executive Director

CoIoraco \V~13r ,
conservation be:;,r.:

June 11, 1997

Jeffi:ey S. Lipton
Director, Business Services
University of Colorado at Boulder
Campus Box 317
Boulder, CO 80309-0317

Dear Jeff:

This letter is in response to your letter ofJune 10, 1997, regarding the dike or levee at the
University of Colorado property, also referred to as the Flatirons Property or the Deepe
Farm Pit. We understand that your agent is seeking a technical revision to the present
reclamation plan from the Division of Minerals and Geology in order to raise portions of
the levee to provide four feet of freeboard above the IOO-year flood profile. You asked
my opinion on three subjects. Your questions and my responses are provided below.

1, You asked "Whether the dike should remain in place, and, if so, whether the
lower portions of the dike should be raised to a level at least four feet above the
base flood level."

We believe that this dike, or levee as we prefer to ca1l it, should definitely remain
in place unless or until an alternative flood control or flood mitigation strategy is
in place. The requirements of the Federal Emergency Management Agency
(FEMA) regarding recognition or certification of a levee include a requirement
for a minimum of three feet of freeboard above the base flood (IOO-year flood).
At a meeting convened by the Colorado Water Conservation Board (CWCB) at .
the Boulder County Court House, which you and I both attended, representatives
from the Flatiron Companies offered to add a foot to the freeboard, making a
total offour feet, to account for potential inadequacies in past hydrologic
analyses of South Boulder Creek. We felt that that offer was a prudent one and
we supported it. The actual parameters for the raising of the levee were
established in a subsequent meeting held in our office which was attended by
representatives from CWCB and Flatirons. We continue to support Flatirons'
offer off our feet although FEMA only requires three feet.

2. You asked "Whether the dike currently offers flood protection benefit to the
residences to the north of the property. " .

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