Harvard Gulch and Dry Gulch Tributary
Flood Hazard Area Delineation
The Harvard Gulch watershed is 7.43 square miles as shown on the Project Area Map, and includes the tributary watershed of Dry Gulch. The Harvard Gulch waterway, with a perennial base flow, is 3.9 miles long and is defined by an underground box culvert, grass-lined open channel, and concrete trapezoidal channel. Dry Gulch is generally piped underground for 1.93 miles. The watershed is roughly bounded by the South Platte River on the west, I-25 on the east, E. Evans Ave on the north, and E. Mansfield Ave on the south. Harvard Gulch is a right-bank tributary of the South Platte River located in south-central Denver. Harvard Gulch outfalls to the South Platte River via a large underground box culvert beneath E. Wesley Ave.
The majority of this watershed is located within the City and County of Denver. The City of Englewood and Cherry Hills Village are also within the southern portion of the watershed. Arapahoe County enclaves exist along the eastern boundary of the upper basin as shown on the Jurisdiction Map.
The High Line Canal flows through the upper reaches of the watershed. Historically, the High Line Canal has intercepted major storm runoff. This canal is currently being studied by Denver and the Urban Drainage and Flood Control District to be retrofitted for water quality detention and stormwater management.
Harvard Gulch has generally functioned well over the last 45 years with
no major flooding issues. The largest flood of record on Harvard Gulch
occurred July 8, 2001. This storm produced little damage to the
community; however, this flow rate is at the capacity of the existing
outfall pipe and the water was within 6-inches of overtopping S. Logan
St and flowing westward through the streets and
The Dry Gulch pipe network capacity
is exceeded in big storm events causing water to flow through the
streets and neighborhoods. Recent flooding has been experienced on July
19, 2011; June 6, 2012; August 8, 2013; June 11, 2015.
is exceeded in big storm events causing water to flow through the streets and neighborhoods. Recent flooding has been experienced on July 19, 2011; June 6, 2012; August 8, 2013; June 11, 2015.
This Project is Sponsored By:
Urban Drainage and Flood Control District
In Cooperation With: