Harvard Gulch and Dry Gulch Tributary
Flood Hazard Area Delineation

Project Summary:

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 neighborhood.

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.

This Project is Sponsored By:

                                

                             Urban Drainage and Flood Control District
 

In Cooperation With: