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<br />which include WSPRO, Open Channel Flow (CHAN), Floodplain Computations (FLPL), and
<br />Channel Cross-Section Water Surface Elevation (XSEC),
<br />
<br />ICON has completed several studies that pertain to floodplain evaluations, Recently, for our
<br />Development Review Standing Work Order Contract with Arapahoe County, we reviewed
<br />two LOMR/CLOMR submittals on Cherry Creek just south of Arapahoe Road for the County,
<br />These projects (Viehmann-Martin Project and Arapahoe Industrial Park) involved hydraulic
<br />review of HEC-2 data and floodplain delineation, as well as reviews of submittals for FEMA
<br />acceptance, Other Arapahoe County projects include a LOMRJCLOMR submittal on Piney
<br />Creek and on Cherry Creek north of Arapahoe Road, We have also completed LOMR's and
<br />CLOMR's on Cottonwood Creek, the South Platte River, Little Willow Creek, Sand Creek,
<br />Horseshoe Park, Big Dry Creek, Cub Creek, and Goldsmith Gulch in the metropolitan area, as
<br />well as several creeks in Fort Collins and Sterling, Colorado,
<br />
<br />ICON's staffhasFEMA contacts both on the local level, as well as in Washington, D,C. We
<br />have several contacts with Michael Baker Jr., Inc" which is the designated FEMA (TEC) for
<br />our region, Our staff also has an excellent working relationship with Mark Matulik, Mr. Larry
<br />Lang and Mr. Brian Hyde at the Colorado Water Conservation Board, We have worked with
<br />them to gain approval on several LOMR's and CLOMR's completed within the State of
<br />Colorado, It is important to be familiar with FEMA's process for LOMR/CLOMR
<br />Applications, As mentioned previously, incomplete submittals can cause costly delays in
<br />processing the applications and in some instances can be cause for rejection, ICON keeps
<br />very current with the forms that are used for the submittal process, Just recently there have
<br />been updates and revisions to the "Rules and Regulations related to the National Flood
<br />Insurance Program (NFIP)", These revisions are current as of March 1997, These regulations
<br />are the basis of the requirements for completing floodplain revisions, Current forms for
<br />completing" Amendments and Revision to the National Flood Insurance Program Maps" are
<br />based on revisions dated May 1996, ICON has also utilized the "Guidelines and
<br />Specifications for Study Contractors" to determine acceptable and required methodology and
<br />analysis required by FEMA for producing Flood Insurance Studies, It is important that study
<br />methodology meet the requirements ofFEMA when applications need to be submitted,
<br />
<br />Another area in which ICON has expertise is in the analysis and design of bridges over
<br />drainageways, streams and rivers, We commonly provide services to City's, Counties and
<br />private consultants such as structural bridge designers that involve hydraulic sizing of bridges,
<br />This work involves evaluating existing and proposed floodplains considering the economics
<br />of sizing bridge-crossing structures, This work includes developing alternatives for different
<br />bridge openings and evaluating conveyance, water surface elevations, velocities, and potential
<br />bridge scour. Methods used include hydraulic models such as WSPRO and HEC-2, Newer
<br />methods of evaluating the impacts of bridges on waterways have been developed and
<br />incorporated into the HEC-RAS program developed by the Corps of Engineers, This
<br />particular program enables the user to better define bridge openings for use in determining
<br />bridge losses for low flow conditions,
<br />
<br />Scour determinations are important for evaluating both ex lstmg and proposed bridge
<br />structures, For existing structures the potential scour can have an impact on the integrity of
<br />the structure for pier foundations, Typically channel degradation over a period of time can
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