|
<br />. Pipestone, Minnesota Section 205 RecOlmaissance Study, The purpose of the
<br />reconnaissance study was to use as much available information as possible to identify
<br />at least one technically sound, environmentally acceptable, and economically feasible
<br />flood damage reduction measure that would warrant a Federal interest in proceeding to
<br />cost-share feasibility studies, Major flooding in May and July of 1993 along
<br />Pipestone Creek and its tributaries caused considerable damage. Alternative levee,
<br />channel, and roadway crossing structure improvements were investigated, Tasks
<br />included cursory identification of envirolUnental concerns, reconnaissance-level
<br />design and construction cost estimate, and supporting studies including hydrologic,
<br />hydraulic, geotechnical, real estate, economic, and environmental evaluations. The
<br />Problem Identification Report was submitted, reviewed, and accepted,
<br />
<br />. Pender. Nebraska Section 205 Feasibility, Study. The purpose of this study was to
<br />confirm whether an economically feasible flood control project could be developed for
<br />Logan Creek at Pender. About 60% of the town is in the Logan Creek 100-year
<br />floodplain and about 40% is in the floodway, Analysis conducted was carried out in
<br />sufficient detail to evaluate the relative merits and economic feasibility of alternative
<br />plans and to develop detailed design and construction cost estimates for the selected
<br />plan. Studies included hydrologic, hydraulic, geotechnical, structural, economic, and
<br />environmental evaluations. Feasibility level designs were prepared for a system of
<br />channel, levee, detention, floodwall and road closure elements that could economically
<br />protect the town. Tasks included a detailed hydrologic analysis utilizing
<br />methodologies outlined in "Bulletin 17B, Guidelines for Determining Flood Flow
<br />Frequency" such that a two-station comparison of available USGS records were made.
<br />Tributary hydrology was developed for two significant drainageways: Stage Creek
<br />and Rattlesnake Creek. Coordination was required with personnel within the Omaha
<br />District, Missouri River Division; Nebraska Division of Roads; and local entities,
<br />
<br />. Rock RaIJids. Iowa Minnesota Section 205 Reconnaissance Stumc. Th(~ purpose of the
<br />reconnaissance study was to use as much available information as possible to identifY
<br />at least one technically sound, environmentally acceptable, and economically feasible
<br />flood damage reduction measure that would warrant a Federal interest in proceeding to
<br />cost-share feasibility studies, Tasks inclucled cursory identification of environmental
<br />concerns, reconnaissance-level design and construction cost estimate, and supporting
<br />studies including hydrologic, hydraulic, geotechnical, real estate, economic, and
<br />environmental evaluations. The Problem Identification Report was submitted,
<br />reviewed, and accepted,
<br />. Tri-Lakes Water Control Manual !::!ydrologic and Hydraulic Model/Mapping
<br />Inventory, South Platte River, Denver, CoLorado, This Task Order involved collecting
<br />and organizing all available hydrologic and hydraulic information on drainageways
<br />within the South Platte River from Chatfielcl Reservoir to the northern edge of the
<br />Denver Metropolitan area, In addition to the South Platte River, the study included
<br />Bear Creek from Bear Creek Dam downstream to its confluence with the river, and
<br />Tollgate/Sand Creek from the Cherry Creek Dam spillway downstream to the
<br />confluence of Sand Creek and the river. Model data collected included CUHP,
<br />SWMM, HEC-I, MITCAT, and HEC,,2, Coordination was required with the CaE,
<br />
<br />5
<br />
|