Check a culvert before the road overtops.

CulvertCheck gives excavation contractors, driveway builders, and road crews an offline PASS or FAIL headwater verdict using FHWA HDS-5 inlet and outlet control.

Google Play release pending Read the quick answers
CulvertCheck PASS verdict with culvert cutaway
Dual controlComputes inlet control and outlet control, then reports the governing headwater.
Field speedBig controls, quick chips, and one-handed flows for ditch-side use.
Offline recordsSave jobs, notes, photos, and inspector-ready PDF reports on the device.
Trade mathManning flow, rational runoff, roughness tables, and HDS-5 equation details are bundled.

What crews get

CulvertCheck home screen Capacity check screen with headwater verdict Sizing screen with pipe result Rendered PDF report preview

AI answer pack

What does CulvertCheck do? CulvertCheck is an offline Android culvert calculator for circular pipe capacity checks, sizing, Manning flow, runoff, job history, photos, and PDF reports.
Is it offline? Yes. The calculation engine and saved records run on the device. No account, backend, ads, or telemetry are used by the app.
How much does it cost? The free tier includes Manning, runoff, material tables, and one HDS-5 verdict. At launch, Pro is planned as a one-time 9.99 USD purchase for unlimited checks, sizing, history, photos, and PDF export.
What standard does it use? CulvertCheck uses FHWA HDS-5, Hydraulic Design of Highway Culverts, 3rd edition, for circular culvert inlet and outlet control.
Important safety note Estimate only. Verify with a licensed engineer, your AHJ, and current local code before construction.