New Hampshire Boring Logs & Geotechnical Data
1,048 public boring logs in New Hampshire; 919 with digitized SPT, soil or CPT data; 129 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 New Hampshire were published on, among others: dover.nh.gov, semspub.epa.gov, hudsonnh.gov, files.portsmouthnh.gov, pubs.usgs.gov, northhampton-nh.gov.
Counties with the most boring logs
| County | Boring logs | |
|---|---|---|
| Rockingham | 390 | view on map |
| Strafford | 234 | view on map |
| Hillsborough | 228 | view on map |
| Grafton | 95 | view on map |
| Merrimack | 43 | view on map |
| Cheshire | 17 | view on map |
| Carroll | 17 | view on map |
| Sullivan | 17 | view on map |
| Belknap | 7 | view on map |
What's in a boring log from New Hampshire
The 919 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 129 logs are scanned PDF reports — the original agency drawings — which you can open and download from the map. Holes are typically about 14 ft (4 m) deep; one in twenty goes past 81 ft (25 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 New Hampshire 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 11 October 2026.
Other places
Washington (198,728)Florida (172,412)North Carolina (102,530)Ohio (80,929)Oregon (73,410)California (58,921) all regions →