Drainage Overview - Maricopa County Department of Transportation

land should be avoided where feasible, and coordination with FCDMC and FEMA may be required.
Care should be taken not to adversely affect the functions of the CAP canal during the drainage design
for the parkway.
In summary, the most critical drainage issue to be considered during the parkway alignment alternatives
analysis is the location of crossings at Trilby Wash, Iona Wash, and other major washes. The selection
of these crossing locations will need to consider the cost of the structures, hydraulic impacts upstream
and downstream, lateral migration, and scour. The impact of the existing alluvial fans and
corresponding drainage corridors on the proposed alignment are another important consideration. The
two overarching goals of drainage design for Deer Valley Parkway are to minimize the impacts of the
proposed parkway on existing drainage patterns and to minimize the impacts of drainage on the
proposed parkway.
091337137, 2011-018, TT005 Maricopa County Department of Transportation
Technical Memorandum 3 Deer Valley Parkway Feasibility Study
Drainage Overview 26 April 2012