Drainage Overview - Maricopa County Department of Transportation

coordination with various governing bodies, other public agencies, development interests, and the
general public.
1.2 Study Area
The Deer Valley Parkway study area is approximately eleven miles long and two miles wide and
is generally centered on the Deer Valley Road section line, from one-half mile west of the
planned future Wild Rose Parkway (approximate 243 rd Avenue alignment) to one-half mile east
of US 60. The study area boundary is shown in Figure 1.
The planned Deer Valley Parkway, as shown in the Hassayampa Framework Study, continues
another six miles west of Wild Rose Parkway to connect with Turner Parkway – this westerly
segment was originally included as part of this study but has since been removed. Due to a
number of ongoing Town of Buckeye planning efforts that will extend beyond the timeframe of
this study, this westerly segment will be examined in greater detail by the Town of Buckeye in a
future study. The Town of Buckeye study should address the need for east/west transportation
network continuity between Wild Rose Parkway and Turner Parkway and reflect the most recent
Community Master Plans within the Buckeye Municipal Planning Area, including Spurlock
Ranch, Festival Ranch, Sun City Festival, Festival Foothills, and Douglas Ranch.
1.3 Document Purpose and Scope
The purpose of the Drainage Overview is to describe the existing drainage conditions in the study
area. The drainage study was limited to the collection and review of existing drainage reports and
studies, existing geologic and groundwater mapping, discussion with stakeholders, and field
observations of existing drainage patterns and structures included in, and adjacent to, the study
area. Hydrologic information from previous drainage and floodplain studies was compiled to
present watershed subbasins and previously determined peak flow rates draining to the study area.
This information provides an overview of the physical features of the study area pertaining to
drainage and will be used in the development of feasible alignment alternatives.
1.4 Design Drainage Criteria
Drainage design for the proposed parkway will follow criteria outlined in the Drainage Policies
and Standards for Maricopa County, Arizona (Maricopa County, 2007) and Chapter 4.7 of the
Roadway Design Manual (Maricopa County, 2004). A draft version of an update to the Drainage
Policies and Standards for Maricopa County was distributed by Maricopa County in July 2010.
091337137, 2011-018, TT005 Maricopa County Department of Transportation
Technical Memorandum 3 Deer Valley Parkway Feasibility Study
Drainage Overview 2 April 2012