Agenda Date: 12/03/2024
Subject:
Title
Resolution 121-2024: Approving an Intergovernmental Agreement (IGA) with Mile High Flood District, regarding design and construction of drainage and flood control improvements for Lee Gulch at Broadway - Amendment No. 1
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:
Approval of an amendment to the IGA with Mile High Flood District for design and construction of drainage and flood control improvements for Lee Gulch at Broadway.
LONG-TERM OUTCOME(S) SERVED:
Safe Community; Financial Sustainability; High-Quality Governance; Sustainable Community with Natural Beauty
DISCUSSION:
Lee Gulch has a drainage basin of approximately 2.42 square miles and stretches 3.98 miles from Highlands Ranch to the South Platte River.
The City of Littleton, in partnership with Mile High Flood District (formerly Urban Drainage and Flood Control District) and Arapahoe County, studied the Lee Gulch and Little's Creek drainageways in a master drainage study call "Major Drainageway Planning Lee Gulch Little Creek" in 1978. At the time of the study the basin was only 42% developed. The 1978 master study recommended additional culvert capacity and channel improvements at the Broadway crossing. The South Suburban Parks Master Plan further envisioned a linear park along the Gulch from the South Platte to County Line Road.
The 66" culvert carrying Lee Gulch under Broadway is a mixed material of reinforced concrete pipe (RCP) and corrugated metal pipe (CMP). The culvert was repaired in 2016 when a portion of the pipe collapsed. A geospray lining technique was used to provided structural reinforcement in addition to repairing the collapsed section. Unfortunately, the geospray has not held and the culvert is experiencing failures that require immediate repair.
Mile High Flood District (MHFD) provides a Capital Improveme...
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