Drainage Overview - Maricopa County Department of Transportation

2.1.4 Wittmann Area Drainage Master Plan (2008)
This ADMP was completed as part of the McMicken Dam project to develop and evaluate
the rehabilitation or replacement of McMicken Dam. As part of this study, the alternatives
analysis for McMicken Dam was refined in Volume MA.
2.1.5 Flood Insurance Study for Sun Valley Parkway North Portion of Town of Surprise
and Unincorporated Areas Maricopa County, Arizona (1993)
The purpose of this FCDMC study was to document the detailed 100-year floodplain and
floodway limits of eight washes near Sun Valley Parkway North. Comments from the
Federal Emergency Management Agency (FEMA) indicated that a detailed Zone AE was
not considered appropriate for this area due to the potential breakout areas for many of the
washes. The floodplain mapping was resubmitted to FEMA as an approximate Zone A
flood hazard area. The data in this report represent the best available data on these washes,
but do not reflect the accepted FEMA FIRM mapping.
2.1.6 Drainage Report: Sun Valley Parkway Phase I (1987)
This drainage report was prepared for the Adams Group in support of roadway design for
the proposed Sun Valley Parkway, which has since been constructed. Sun Valley Parkway
is located just south of the Deer Valley Parkway study area. Phase I was from Citrus Lane
to approximately 255 th Avenue. The drainage report documents the amount of runoff that
crosses Sun Valley Parkway and provides sizes for the proposed culverts and channels.
2.1.7 Drainage Enhancements for Sun Valley Parkway (1988)
This document discusses proposed enhancements to the drainage along Sun Valley Parkway
due to damage from storms that occurred in August of 1988. The report includes the design
approach used for collecting and routing runoff in an alluvial fan area for a roadway project.
Because Sun Valley Parkway is located close to the Deer Valley Parkway study area, this
information could be used in the design of drainage features for the proposed parkway.
2.2 Summary of Other Drainage Documents and Data
In addition to drainage studies, data sources such as geologic investigations and groundwater
records were reviewed for information on other regional physical processes that could potentially
impact the Deer Valley Parkway study area. Summaries of the more relevant data sources have
been developed.
2.2.1 City of Surprise Long Range Major Street Plan, Planning Areas 2 and 3 (2008)
This plan provides conceptual roadway alignments for the City of Surprise. The maps
include a conceptual alignment for Deer Valley Parkway and potential locations of future
drainage structures like bridges, culverts, and a potential drainage easement. The potential
drainage easement shown on the plan is similar to what may be needed for alternatives
requiring channelization on the upstream side of the parkway. The final report of this study
will identify where a drainage easement may be needed. Maps 5D through 5I encompass
091337137, 2011-018, TT005 Maricopa County Department of Transportation
Technical Memorandum 3 Deer Valley Parkway Feasibility Study
Drainage Overview 6 April 2012