Agenda Date: 09/15/2026
Subject:
Title
Resolution 66-2026: Ratifying and approving an Intergovernmental Agreement with Urban Drainage and Flood Control District D/B/A Mile High Flood District regarding funding of Major Drainageway Planning and Flood Hazard Area Delineation for Lee Gulch
Body
From: James L. Becklenberg, City Manager Prepared by: Brent Soderlin, Director of Public Works & Utilities Sarah White, Water Resources Manager Presentations: N/A
PURPOSE:
Does council support ratification and approval of an Intergovernmental Agreement (IGA)with Urban Drainage and Flood Control D/B/A Mile High Flood District for funding of Major Drainageway Plan and Flood Hazard Area Delineation for Lee Gulch.
LONG-TERM OUTCOME(S) SERVED:
Safe Community; High-Quality Governance; Sustainable Community with Natural Beauty
DISCUSSION:
Lee Gulch drains approximately 2.66 square miles and is comprised of 2 main drainage basins, Lee Gulch and Lee Gulch South Fork. The Lee Gulch drainage basin is primarily within Arapahoe County and within City of Littleton and City of Centennial jurisdictions. The Lee Gulch drainage basin within Douglas County is not considered with this updated report.
In October 1977, the Major Drainageway Plan (MDP) and Flood Hazard Area Delineation (FHAD) for Lee Gulch and Little Creek was published by KKBNA Consulting Engineers and serves as the current Federal Emergency Management Agency (FEMA) regulatory hydrology for the watershed. The Lee Gulch regulatory floodplain has been in the same delineation since this original 1977 FHAD. Although this study looked at future conditions, the watershed has been fully developed since the FHAD was published and rainfall data has been updated.
Watershed planning is an important way to help protect people and property against flooding, erosion, and stormwater quality problems. These plans contain a strategy and work plan to identify flood risk management projects, guide new land development projects...
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