FLOOD10390

• County: Boulder
• Community: Boulder
• Stream Name: Fourmile Canyon
• Basin: South Platte
• Title: Fourmile Canyon Creek - Major Drainageway Planning - Phase A Report - Alternatives Analysis
• Date: 6/1/2000
• Prepared For: UDFCD, Boulder
• Prepared By: Love & Associates
• Floodplain - Doc Type: Flood Mitigation/Flood Warning/Watershed Restoration

The eighth progress meeting was held on October 19, 1999. An update was given on the
revised 'spill hydrology' results. An update was also given on the status of the
Wonderland Creek floodplain study. Status of the damage assessment was given along
with an overview of the October 18 Public Meeting. The County raised concerns about
the decisions being made, and how they need to address not only the concerns of Boulder
City residents, but also the impacts on the County residents. Debris blockage percentages
utilized in the floodplain study were discussed. Discussions were also held regarding the
Independent Review Panel (IRP) and members names were provided.

The ninth progress meeting was held on November 17, 1999. Results of the field survey
were reported. Discussions were held on the impact of the low flow water crossing below
Broadway and the survey findings at Crestview Elementary School. A "Possible Alternate
Solutions Matrix" on a reach by reach basis was passed out and discussed. An update of
the Greenway Master Plan along Fourmile Canyon Creek was also presented by City staff.

the
the

The tenth progress meeting was held on January 19, 2000. Drawings indicating
proposed final three alternates were presented and discussed. Initial responses to
selected alternates were solicited prior to publication of the draft Phase A report.

indicates only 400 cfs spills out of Fourmile when in fact approximately 1,800 cfs spills.
The results of the mapping verification were reported to be generally within acceptable
mapping standards. It was requested that additional properties, not constructed at the time
the City mapping was prepared, be field surveyed. An update on the status of the damage
assessment was given. Approximately 350 properties are located in the newly defined
floodplain boundaries

The fifth progress meeting was held on August 26, 1999 Discussions were held on the
status of the 'Weekly Information Packet' (WIP) being prepared to update City Council on
the study process and progress. Throughout the study, eleven 'Fact Sheets' were
generated by City staff with input from Love & Associates, Inc. and the Urban Drainage
and Flood Control District. These Fact Sheets covered such subjects as hydrology, draft
floodplain re-study, what are floodplain regulations, how is the Fourmile Canyon Creek
formed, what are environmental values, etc. Also discussed at this meeting were the
results of the draft floodplain study with and without the spill. Preparations for the
September 13, 1999 Public Meeting were discussed including who should address what
topics.

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Review comments pertaining

The eleventh progress meeting was held on April 11, 2000
to the draft Phase A report were presented and discussed.

The sixth progress meeting was held on September 9, 1999 and an update was given on
the damage assessment but not all data had been received yet from the Assessor. The
second Public Meeting was again discussed. A series of Fact Sheets were developed, and
were reviewed. Copies of Fact Sheets will be provided to the public at the September 13th
meeting.

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Meetings held throughout

PROGRESS AND PUBLIC MEETING DATES

Meetings and Public

Following is a list of dates of all Progress
the Phase A portion ofthis project

The second Public Meeting was held on September 13, 1999. Approximately 50 persons
were in attendance. The following topics were discussed: hydrology and hydraulics;
history of flooding of Fourmile Canyon Creek; alluvial fan floodplain; wildlife habitat and
the North Boulder Subcommunity Plans. A copy of the history of flooding information
provided by a Boulder resident is included in Appendix D.

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Progress Meeting No.1
Progress Meeting NO.2
Progress Meeting No.3
Public Meeting NO.1
Progress Meeting NO.4
Progress Meeting No.5
Progress Meeting No.6
Public Meeting No.2
Progress Meeting No.7
Public Meeting No.3
Progress Meeting No. 8
Progress Meeting No.9
Progress Meeting No. 10
Progress Meeting No. 11

Event

July 1, 1999
July 15, 1999
July 29, 1999
August 2, 1999
August 12, 1999
August 26, 1999
September 9, 1999
September 13, 1999
September 23, 1999
October 18, 1999
October 19, 1999
November 17,1999
January 19,2000
April 11, 2000

Date

The seventh progress meeting was held on September 23, 1999. An overview of the
second Public Meeting was given. In addition to the Public Meetings, a Citizens Task
Force had met once previously and it was reported that they would meet again on
September 27th. This Citizen Task Force has requested an Independent Review Panel
(IRP) to be selected to review the parameters used for and the findings of this planning
study and make recommendations or concerns as part of their findings. Specific
parameters to be used in the damage assessment were agreed upon. Packets of sketches of
the proposed various alternates to be studied for each reach were distributed and discussed
in detail on a reach by reach basis.

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The third Public Meeting was held on October 18, 1999 with approximately 40 persons in
attendance. The draft floodplain study mapping was presented along with a description of
the damage assessment. Various potential alternates for mitigation were discussed on a
reach by reach basis and input was solicited.

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1-3

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