1D and 2D HEC-RAS modeling through FEMA submission — most floodplain submissions fail on completeness, not technical merit.
1D & 2D HEC-RAS Modeling
Steady and unsteady-flow hydraulic modeling for riverine, urban, and coastal-adjacent systems. 1D for clean channelized flow; 2D for overbank, urban grid, and complex floodplain interaction where 1D assumptions break down. Models delivered with documented input data, parameter assumptions, sensitivity notes, and a clean output package.
2D Rain-on-Grid Screening
In-house model build for HEC-RAS 6.6. USGS 3DEP terrain or AMP drone photogrammetry, NOAA Atlas 14 design storms on NRCS distributions, and SCS curve-number infiltration from SSURGO soils and NLCD land cover. A drainage-area model builds and runs in minutes, so existing conditions and each alternative are compared before design dollars are committed. Screening-level until RTK survey replaces the preliminary terrain.
Local & FEMA Floodplain Studies
No-rise certifications, floodplain encroachment analyses, CLOMR/LOMR submissions, and county-level floodplain development permits. The alternatives analysis and detailed work map FEMA actually requires — most submissions fail on completeness, not technical merit.
Inundation, Velocity & Scour Mapping
2D HEC-RAS output mapping for dam-break analysis, levee/embankment failure scenarios, and structure-protection studies. Velocity and shear-stress mapping for scour assessment at bridges, culverts, and stream restoration features.
See the ground.
Ask better drainage questions.
Select a site in a Maryland pilot area. Explore public terrain, see a saved hydraulic-model example, and send the location to AMP for review.
Explore your siteFree terrain preview. No email required.
Civil site design, from feasibility to record plat.
Tell us about the parcel, the disturbance area, and the jurisdictional reviewers in play. The response will outline a likely permit pathway.
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