The Ho Kay Gan Area Drainage Master Study (ADMS) includes a “built out” area of approximately 300 acres in unincorporated Yavapai County. Located west of Williamson Valley Road and south of the intersection of Williamson Valley Road and Pioneer Parkway, the Ho Kay Gan area has been subject to historic drainage and flooding problems, with the latest significant flooding occurring in September 2013.
Civiltec recently completed the Ho Kay Gan ADMS. This project included new 2-dimensional hydrologic and hydraulic modeling for the 1.5-square-mile watershed impacting the study area. Civiltec developed conceptual alternatives and preliminary cost estimates to mitigate drainage and flooding problems in the area.
During Summer 2018, construction was completed for the first phase of the storm drain improvements. The team constructed approximately 600 linear feet (LF) of 54″ high-density polyethylene (HDPE) storm drain pipe, as well as multiple 18″ and 24″ HDPE storm drain laterals with new concrete headwalls. Additionally, the first phase comprised of the reconstruction of about 1,700 LF of roadway and local roadside drainage improvements including channels and driveway culverts.
Vice President Chris Dusza led the team’s design and analysis efforts as Project Manager. He was supported by Project Engineer Andrew Shroads and Designer Raymond Buettner as well as other Civiltec staff. Yavapai County anticipates bidding the next phase of the project in Spring 2019.