Montana Boring Logs & Geotechnical Data
6,397 public boring logs in Montana; 6,285 with digitized SPT, soil or CPT data; 112 scanned log PDFs. Sources include Montana DOT (MDT), Montana DOT (MDT) – MWD, plus public reports found by web crawl. Free to search on the map, download or query by API.
Where the data comes from
Web-crawled reports in Montana were published on, among others: deq.mt.gov, ftp.mdt.mt.gov, dojmt.gov, montana.edu, mdt.mt.gov, pubs.usgs.gov.
Counties with the most boring logs
| County | Boring logs | |
|---|---|---|
| Cascade | 399 | view on map |
| Lewis and Clark | 392 | view on map |
| Fergus | 359 | view on map |
| Teton | 352 | view on map |
| Richland | 281 | view on map |
| Missoula | 266 | view on map |
| Carbon | 258 | view on map |
| Rosebud | 216 | view on map |
| Flathead | 184 | view on map |
| Glacier | 175 | view on map |
| Meagher | 173 | view on map |
| Beaverhead | 164 | view on map |
What's in a boring log from Montana
The 6,285 digitized borings carry the data engineers actually use: SPT blow counts (N-values) by depth, soil and rock descriptions, groundwater observations and, where the source ran cone penetration tests, CPT tip resistance and sleeve friction. A further 112 logs are scanned PDF reports — the original agency drawings — which you can open and download from the map. Holes are typically about 20 ft (6 m) deep; one in twenty goes past 75 ft (23 m). Not sure what a boring log looks like? See annotated example boring logs.
How to get this data
- Map — pan to a site, click a boring, and view the log, the original PDF, or an ML soil-profile prediction. No account needed.
- Downloads — every boring exports as PDF, DIGGS XML or AGS4; draw a polygon on the map for a multi-boring export or a site report.
- API — query borings by coordinates or bounding box, pull SPT/CPT/lab records, and generate site reports programmatically.
- Contribute — have Montana boring logs that are not here yet? We take PDFs, DIGGS, AGS and spreadsheets.
This data was collected from public agencies and is republished as-is. It is a planning tool, not a substitute for a site investigation; see the terms and disclaimer. Counts refreshed 2 September 2026.
Other places
Florida (168,718)Washington (151,445)North Carolina (99,509)Ohio (78,203)Oregon (61,067)New Jersey (49,412) all regions →