Maine Boring Logs & Geotechnical Data
7,110 public boring logs in Maine; 4,872 with digitized SPT, soil or CPT data; 2,238 scanned log PDFs. Collected from publicly posted geotechnical reports. Free to search on the map, download or query by API.
Where the data comes from
Web-crawled reports in Maine were published on, among others: maine.gov, parcelsfolder.portlandmaine.gov, semspub.epa.gov, nae.usace.army.mil, auburnmaine.gov, perrymaine.org.
Counties with the most boring logs
| County | Boring logs | |
|---|---|---|
| Cumberland | 1,427 | view on map |
| York | 823 | view on map |
| Aroostook | 793 | view on map |
| Kennebec | 703 | view on map |
| Penobscot | 693 | view on map |
| Androscoggin | 478 | view on map |
| Oxford | 338 | view on map |
| Somerset | 332 | view on map |
| Washington | 327 | view on map |
| Hancock | 276 | view on map |
| Lincoln | 263 | view on map |
| Sagadahoc | 177 | view on map |
What's in a boring log from Maine
The 4,872 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 2,238 logs are scanned PDF reports — the original agency drawings — which you can open and download from the map. Holes are typically about 15 ft (5 m) deep; one in twenty goes past 69 ft (21 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 Maine 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 18 October 2026.
Other places
Washington (195,308)Florida (171,292)Ohio (81,008)Oregon (72,840)North Carolina (66,211)California (60,228) all regions →