Civil engineers
Existing Conditions Data Packet
One decision: what the drainage basis of design has to contend with, before anyone drives out or bills design hours — which rainfall table governs and whether the site is even inside an atlas, which hydrologic soil group the runoff model gets, whether infiltration is a candidate at all (depth to seasonal high water table / bedrock), whether a wetland delineation and Corps coordination belong in th
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What is on it
18 lines, three maps and charts, and one page of answers. Anything we cannot answer for a property says so rather than being left blank.
County and county code
Governing jurisdiction and county subdivision
Legal description: meridian, township, range, section
Ground measurement date
Ground fall at the existing building
Soil map unit, code and dominant component
Hydrologic soil group
Depth to seasonal high water table
Depth to bedrock
Soil flooding frequency class
Watershed names and codes, all three levels
Nearest named watercourse and distance to it
Nearby water features and their types
Permitted discharge points and receiving waters
Existing impervious cover, percent and area
Design storm depths and intensities
Mapped wetlands on and near the site
Flood zone, and any levee it depends on
What it is not
- No seal, no stamp, no certification.
- No hydrology is computed.
- No risk score, ranking, triage or prediction.
- No prescription.
- Not an Elevation Certificate, and no BFE-versus-lowest-adjacent-grade determination for a regulatory filing.
- Not a jurisdictional wetland determination and not a Phase I ESA.