FLOOD08859

• County: Clear Creek
• Community: Georgetown
• Basin: South Platte
• Title: Flood Control Master Plan and Local Pre-Disaster Flood Mitigation Plan
• Date: 7/1/1998
• Prepared For: Georgetown
• Prepared By: Clear Creek County Office of Emergency Management
• Floodplain - Doc Type: Flood Mitigation/Flood Warning/Watershed Restoration

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GEORGE G. SLOVENSKY, JR.

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assess system performance during storm events. HEC-I modeling results provided inflow
hydrographs to the spreadsheet model and WSPG was used to analyze channel hydraulics.

. Willow Creek Master Plan (Wasatch County, Utah) - Hydrologic and hydraulic modeling of
the Willow Creek watershed and channel using HEC-I and HEC-2. HEC-I was used to
quantify stormwater inflows to the Willow Creek channel and HEC-2 to assess channel
capacity. Modeling accounted for interaction between the natural drainage system and a
complex irrigation network (ditches and control structures). Alternatives were developed to
provide 100-year flood protection for rapidly urbanizing areas adjacent to the channel in
Draper City, Utah.

. Storm Drainage Master Plan for Salt Lake City, Utah - Hydrologic watershed modeling using
HEC-I. Hydraulic modeling of surcharged storm drains using HYDRA. Development of a
spreadsheet based model to simulate hydraulics for a system of detention basins and
surcharged storm drains.

. Storm Drainage Master Plan for Spokane County, Washington - Hydrologic modeling of
rainfall, snowmelt and chinook events for two watersheds in Spokane County using HEC-l.

. Los Angeles County Drainage Area EIR (Los Angeles County Dept. of Public Works) -
HEC-I/HEC-5 modeling of the Los Angeles and San Gabriel River watersheds and flood
control systems. HEC-I modeling was used to quantify watershed runoff. HEC-5 was
subsequently applied to simulate the performance of the system of flood control reservoirs.
Modeling results were used to develop alternatives for providing 100-year flood protection
along the Lower Los Angeles River. A high degree of watershed urbanization, limited new
detention opportunities and the susceptibility of steep hillsides to periodic burns were
important factors in the analysis.

. Northridge Tributary to Dad Clark Gulch Channel Stabilization Project (Highlands Ranch
Metropolitan Districts) - Project Engineer for the conceptual study of alternatives, final
design and CMS of three grouted-boulder drop structures. Channel stability problems were
attributed to watershed urbanization which had created a permanent base flow and
significantly increased peak discharges. Public safety and aesthetics were key concerns due to
the presence of a nearby elementary school and surrounding residential development.
Technical specifications were developed and design drawings were produced using the
MicroStation CAD software package.

. Storm Drainage Master Plan for Las Vegas, Nevada - Hydrologic watershed modeling using
HEC-I. Modeling results were used to size and prioritize drainage improvements.

. Las Vegas Valley NPDES Municipal Stormwater Discharge Permit (Clarke County Regional
Flood Control District) - Analysis of rainfall, wet and dry weather channel flows, and water
quality data in support of the Las Vegas Valley NPDES municipal stormwater permit.

~ MONTGOMERY WATSON