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Evans Creek Restoration
Award-Winning Project
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To complement and support our firm’s traditional
civil engineering services, CFA has an established hydrology department with
a staff of highly-qualified engineers to provide innovative solutions
to stormwater control. We specialize in urban and watershed rainfall/runoff
studies, flood frequency calculations, alluvial fan hydrology, floodplain
analysis, stream restoration, and erosion mitigation, as well as a variety
of hydrologic permitting services.
From stormwater runoff to erosion issues, CFA has the
ability to provide our clients with a comprehensive drainage analysis
and design. Before you plan your next project, give us a call to evaluate
your hydrology issues. Let us put our expertise to work for you to help
identify economical solutions which will prevent future property damage
and ultimately protect your investment.
Hydrologic Services
- Urban and watershed rainfall/runoff studies, using
computer simulation models HEC-1, HEC-HMS, TR-55, or Rational Method.
- Flood frequency calculations and statistical analysis
utilizing the latest USGS gauge data and software.
- Alluvial fan hydrology and mapping of flood hazard
areas in accordance with FEMA guidelines.
- Master drainage studies identifying key drainage issues
affecting the property and providing economical, code-compliant solutions.
Hydraulic Engineering Services
- Floodplain analysis and mapping, including flood
profile calculations, bridge and culvert modeling, split flow and
diversions utilizing HEC-RAS under both steady and unsteady flow conditions.
- Channel, storm drain, detention pond and culvert design,
using Haestad Methods computer programs FlowMaster, StormCAD, PondPack,
and CulvertMaster.
- Sediment transport calculations and stable channel
design including armoring and dissipation structures.
- Stream restoration, including the reconstruction of
natural floodplains and wetlands.
- Erosion mitigation plans, including the development
of Best Management Practices (BMPs) for the control of erosion during
construction.
Hydrologic Permitting Services
- Floodplain mapping, preparation, submittal, and processing
of Letters of Map Revision (CLOMR and LOMR) to FEMA.
- Waters of the US permitting, including coordination
of delineation, mitigation, submittal, and processing through the
US Army Corps of Engineers.
- Storm Water Pollution Prevention Plans (SWPPPs),
including preparation, submittal, and processing through the appropriate
governmental agencies.
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