Survey Toolkit

Accepts 10+00 or 1000 format — ending station is computed from distance

Type any station (10+00 or 1000) and its elevation is computed on the grade line — even beyond the run, projected on the same grade. Needs a starting elevation and a grade (or two elevations); with no starting station, enter distance from the start (ft). Works with just starting elevation + slope, no distance needed.

Negative = downhill from start point

Or drag the probe on the curve below

Enables PC / PI / PT stationing and the staking table

Additional counties can be added as data profiles

To get coordinates: open Google Maps, right-click the project site, click the coordinates shown at the top to copy, then paste here (paste both into the latitude box and they will split automatically). Lookup itself works offline.

District term for mean annual rainfall (July–June season) — per the 1977 B-166 Isohyet Map, valid range 9–40

District criteria: ≤1 sq mi → 10-yr · 1–4 sq mi → 25-yr · ≥4 sq mi → 50-yr + freeboard

Minimum 5 min · Kirpich helper: length ft, drop ft

C is limited to the published range for the selected surface

Composite (area-weighted):Use weighted C