FLOOD02900

• County: Adams
• Community: Commerce City
• Basin: South Platte
• Title: Lower First Creek and Direct Flow Area 0055 Major Drainageway Planning
• Date: 5/1/2002
• Prepared For: UDFDC
• Prepared By: Turner Collie & Braden Inc.
• Floodplain - Doc Type: Floodplain Report/Masterplan

AGENDA

TumerCellie0Braden Inc.

MEETING MINUTES

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First Creek asp and FHAD
(Progress Meeting)
Time: 2:00
Date: August 16, 2000
Location: Urban Drainage & Flood Control District

Subject:
Job No.:

Lower First Creek and Direct Flow Area 0055 Outfall Study
35-05096-040

Place: Urban Drainage and Flood Control District Offices
Date & Time: 8/16/002:00 PM

(I)

Introduction

Attendees: Bill DeGroot (UDFCD)
David Center (TCB)
Tim Kilgannon (RVO-R.V1A)
Edward Stafford (Commerce City)
Bernard Stockman (RMA-Army)

David Krickbaum (TCB)
Chris Gervais (Commerce City)
Tim Masters (TCB)
Pete Jessen (Mile High Development)
Harry Kushniroff (Gardner-Kushniroff)

(2)

Comments from August 2"" meeting

Prepared By: David Center

Date: 8/17/00

(3)

FHAD

The purpose of the meeting was to report on progress on the Outfall Planning and Flood Hazard Area
Delineation Study for the lower First Creek watershed.

(4)

Alternatives Report

FHAD
TC&B described the modeling approach that was used to develop the two split flow rates. The first split
flow occurs at the 104'h Avenue overpass of[-76. The second flow split occurs along 104'h Avenue.
Rating curves were developed for each of the split flow locations to determine the flow rates. At 1-76 it
has been determined that 3300 cfs will flow through the underpass and 6200 cfs will flow across 1-76 to
the west. Along I04th Avenue, it was determined that 2700 cfs will flow to the north and that 3500 cfs
will continue west to First Creek. With this flow split, 6000 cfs will flow north along the UPRR. TCB
provided copies of the HEC RAS output and maps to UD&FCD for review.

(5)

Other Issues

(6)

Meeting Schedule

Downstream of US-8), grading has started for the Belle Creek development. The existing topography
from the project mapping is being used to model the floodplain in this area. TC&B asked the sponsors if
this area will need to be modeled to reflect the as constructed condition. Sponsors will advise TC&B on
this issue at a latter date.

Alternatives Report
A summary of the recommended alternative was presented to the landowners that were present. The
Owners questioned the location of the culvert crossing Havana Street and potential conflicts with existing
gas and petroleum pipelines and electric transmission lines. It was explained the plans shown in the
alternatives report are conceptual and that more detailed design and facility location will be done as part
of the preliminary design phase of the project. The draft Alternatives Report is being reviewed and will
be delivered to UDFCD for distribution next week.

Other Issues
TC&B will print the Final Hydrology Report and deliver it to UDFCD next week

Meeting Schedule
The next scheduled meeting is September 6 at 2:00 PM at the UDFCD.

Distribution: Study Contact List