FLOOD10493

• County: Adams
• County: Arapahoe
• Community: Aurora
• Stream Name: Upper Box Elder Creek
• Basin: South Platte
• Title: Upper Box Elder Creek Outfall Systems Planning Study - Alternative Evaluation Report
• Date: 12/1/1994
• Prepared For: Aurora, Arapahoe County, Adams County, UDFCD
• Prepared By: CH2M Hill
• Floodplain - Doc Type: Floodplain Report/Masterplan

stormwater

Consider National Pollutant Discharge Elimination System and
quality issues in overall basin planning.

8

and

meetings,

invited to project

following organizations were notified of the project,
received meeting !1linutes

storage policy.

Consider a detention and channel

9.

and

of

Alternative Development Process

The development of alternatives was based on the inventory of existing channel and
riparian resources, the hydrologic analysis, and the goals and objectives of the study.
CH2M HILL initiated alternative development by preparing draft alternative concepts
presenting the concepts to the project sponsors and other interested organizations at
project meetings. During the project meetings, the pros and cons of alternatives were
discussed and alternative concepts were developed which met the needs and objectives
the project sponsors and the other organizations involved.

1.8

Colorado WaterConservatiori Board
Federal Emergency Management Agency
Colorado State Land Board
Central Colorado Water Conservancy District
Colorado Department of Transportation
Henrylyn Irrigation District
North Front Range Water Quality Planning Association
Soil Conservation Service
Colorado Division of Wildlife
U.S. Army Corps of Engineers
Colorado Water Quality Control Division
U.S. Environmental Protection Agency

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Of these, staff from the first six organizations attended project meetings and provided
input during the hydrologic and alternative evaluation phase of the study.

Acknowledgments

CH2M HILL would like to acknowledge the following people who regularly contributed
to an understanding of the study area and to the progress of the hydrologic and alternative
evaluation portions of the study.

Person

Organization

1.7 Study Goals and Objectives

Ben Urbonas
John Doerfer

Kevin Wegener
Joe Wingert
Ronald Degenhart
Mike Turner

Brian Love

UDFCD

City of Aurora

Identify stream corridor width and physical design character that would
provide for adequate flood conveyance and establish stream corridors as a
major open space amenity for developing communities.

2.

Daren Duncan
Besharah Najjar

Brian Hyde

John Liou

Scott Price

Forest Leaf
Gary Johnson
Butch Gerkin

Colorado Water Conservation Board
Federal Emergency Management Agency
Colorado State Land Board
Central Colorado Water_Conservancy District
Colorado Department of Transportation
Henrylyn Irrigation District

Arapahoe County
Adams County

Preserve and enhance, where possible, existing natural riparian areas and
functions.

3.

reducing

to establish stable channeling beds and banks,
and enhancing water quality.

Identify measures
long-term maintenance costs

4.

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1.9

1994 to

and September 21,

Twelve project meetings were held between October 26, 1993
discuss results and solicit input from the advisory committee.

were adopted by the advisory committee.

Analyze existing and future development hydrology for the study area to
provide a basis for developing outfall systems plan.

The following study goals and objectives

1

and active and passive recreational facilities

access routes,
network.

Integrate trails,
into the stream

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landowners and

system plan for

Estimate implementation costs of outfall
local jurisdictions.

6.

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1-3

Prepare Flood Hazard Area Delineation (FHAD) floodplain and floodway
information for Coyote Run and Box Elder Creek within the study area.

7.

DENlOO16A53.WP5

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