Welcome to the
Coal Creek and Rock Creek
Major Drainageway Planning Study and FHAD Website

Project Description

The Urban Drainage and Flood Control District maintains Major Drainageway Planning Studies and Flood Hazard Area Delineations within the District to provide a basis for basin-wide planning and floodplain management.

The purpose of the study is to provide hydrologic analysis, alternatives assessment, updated hydraulics and floodplain analysis.

Project Area

The study area begins upstream at Highway 128 and extends to the northern Erie city limit, just upstream of the confluence with Boulder Creek. Click here for a Map of the Coal Creek and Rock Creek Study limits.

The project area is roughly 54 sq. mi. and overlaps multiple jurisdictions, including Superior, Louisville, Lafayette, Erie, Broomfield, and unincorporated Boulder County.

Project Goals

• Identify existing flooding and drainage problems within the study area.
• Obtain input from the public, stakeholders, and the project sponsors to develop feasible drainage solutions.
• Pinpoint the needed stormwater conveyance, detention, stream stability, and stormwater quality improvement measures.
• Delineate the 100-year flood hazard area for Coal Creek and Rock Creek.
• Prepare a Conceptual Preliminary Design Report and a Flood Hazard Area Delineation Report.

Project Sponsors

The project is funded through the combined efforts of the following entities:

• Urban Drainage and Flood Control District
• Boulder County
• City and County of Broomfield
• Town of Erie
• City of Lafayette
• City of Louisville
• Town of Superior

Project Engineer

RESPEC Consulting & Services was selected to perform the Major Drainageway and Planning Study and Flood Hazard Area Delineation services for Coal Creek and Rock Creek. For more information about RESPEC, please visit their website at www.respec.com.

Please direct comments or questions to:

David Delagarza, P.E., CFM
Email: david.delagarza@respec.com
(303) 757-3655