Anderson Consulting Engineers’ staff experience includes the completion of literally hundreds of floodplain studies in variety of settings, including the preparing of Digital Flood Insurance Rate Maps (DFIRMs) and Flood Insurance Studies (FIS) for the delineation of FEMA-compliant flood hazard zones related to riverine flooding. These studies have included the application of HEC-RAS (both state-state and unsteady flow), FLO-2D and HEC-2. As part of this work, ACE staff has become well acquainted with the technical specifications and guidelines promulgated by FEMA, as well as floodplain regulations adopted by numerous communities, counties and states. Continuous coordination and consultation with local community officials, FEMA staff and FEMA review contractors are integral parts of our work. As part of these tasks, ACE staff has successfully proven their ability to communicate the goals and objectives of the National Flood Insurance Program (NFIP) to participating counties, cities and towns throughout Colorado, Wyoming, Utah, Nevada, Nebraska, California, Indiana, Kansas, Mississippi and Louisiana.
Anderson Consulting Engineers range of experience with respect to floodplain studies includes the following:
- Preparation of countywide DFIRM Maps, DFIRM databases and FISs, with MIP data management
- Use of geospatial data with GIS and AutoCAD in hydrologic and hydraulic modeling, floodplain map preparation and database creation
- Hydraulic modeling of river systems, in both 1-D and 2-D, using steady-state and unsteady modeling techniques
- Evaluation and delineation of floodplains and floodways in normal, split flow and looped flow situations
- Use of industry standard automated tools, as well as the development and use of in-house automated tools, for hydrologic and hydraulic modeling applications, floodplain and floodway delineation, and DFIRM/FIS production
- Preparation of FISs, PMRs, CLOMRs and LOMRs with acceptance by FEMA
A small sample of floodplain studies completed by ACE include the following:
- Colorado CTP Flood Map Modernization Project, CWCB, Colorado
- Pueblo County DFIRM Conversion Project, Pueblo County, Colorado
- Logan River and Blacksmith Fork Flood Control Project Phase I – Existing Condition Flood Hazard and Levee Evaluation, Logan, Utah
- South Platte River Floodplain Study for the Hayman Burn Area Deckers, Colorado
- Allison Draw Map Modernization and Laramie County DFIRM Project, Laramie County, Wyoming
- Pascagoula River Study and Hydraulic Structure Evaluation, Canadian National Railroad, Merrill, Mississippi
- Stollsteimer Creek Floodplain Study, Archuleta County, Colorado
- Floodplain Modeling for Spring Creek at Drake Road, Remington Street and Welch Street, Fort Collins, Colorado
- Boulder Creek and Boulder Slough Floodplain Mapping Study, Boulder, Colorado
- Ford and Washington Street Bridges, Golden, Colorado
- Timberline Road Extension- Levee and Bridge Design, Fort Collins and Larimer County, Colorado
- Sheep Draw Floodplain Study, Greeley, Colorado
- Power Plant Dam/Boat Chute Project, Cache la Poudre River, Fort Collins, Colorado
- La Plata County DFIRM Conversion Project, La Plata County, Colorado
- St. Vrain Creek Floodplain Mitigation/FasTracks TOD Site Drainage Improvements, Longmont, Colorado
- LPATH Bridge, Berm Erosion Protection Measures, and Floodplain Permitting, Cache la Poudre River, Fort Collins, Colorado
- Hydraulic Analysis for Spring Creek at Cottonwood Glen Neighborhood Park, Fort Collins, Colorado
- Roaring Fork River, Crystal River, Castle Creek, Coal Creek, and Maroon Creek Floodplain mapping Project, Pitkin County, Colorado