Earth Support Corp

Grafton CountyNew Hampshire

Lincoln, New Hampshire

Bedrock sits a median 40 ft down across 21 logs, deeper than the New Hampshire median of 20 ft. None of its 31 inventoried bridges is rated poor.

Median depth to bedrock

40 ft

middle half 19–58 ft · 21 logs

Bridges rated poor

0

of 31 inventoried

Mapped landslides

1

USGS inventory points

FEMA repair $, Grafton County

$53.0M

federal share since 2010 · county-wide

01 · Ground

Rock turns up a median 40 ft down

From 21 depth-to-rock records inside Lincoln (NH DES well inventory). Logs cluster where people drill wells and bore for roads, so treat this as the town’s pattern, not a site answer.

Half of Lincoln's logs reach rock between 19 and 58 ft

Depth to bedrock: 10th–90th percentile whisker, middle-half box, median tick; dashed line = New Hampshire median.
median 40 ft
NH 20 ft
050 ft
024680–5 ft5–10 ft10–20 ft20–50 ft50–100 ft100+ ft
n = 21 logsSource: NH DES well inventory
▸ Show the numbers
Depth to rock (ft)Logs
0–52
5–101
10–203
20–507
50–1006
100+2

Rock within 10 ft

14%

of logs (31% across New Hampshire). Shallow rock means ledge in excavations, refusal for driven piles and rock anchors rather than soil nails; deep ground means taller shoring and more groundwater. 38% of logs here go past 50 ft.

Mapped landslides

1

1 landslide. Inventory points from the USGS U.S. Landslide Inventory; many are prehistoric slides mapped from lidar.
Bedrock & soils across New EnglandDams, disasters & landslides

02 · Bridges

None of Lincoln's 31 bridges is rated poor

Every highway bridge and large culvert in the 2025 National Bridge Inventory that stands inside Lincoln. Median age 42 years; 1 posted for weight.

68% good, 0% poor

FHWA good / fair / poor rating — the lowest of deck, superstructure, substructure or culvert.
  • Good21 · 68%
  • Fair10 · 32%
  • Poor0 · 0%

Structures by decade built

051015pre-19101930s1940s1970s1980s1990s2010s
n = 31 structuresSource: FHWA National Bridge Inventory 2025
▸ Show the numbers
BuiltStructures
pre-19101
1930s4
1940s1
1970s5
1980s15
1990s1
2010s4

03 · Dams & disasters

Grafton County has drawn $53.0M in federal disaster repair since 2010

FEMA Public Assistance is reported by county, so the figure below is Grafton County-wide context, not a Lincoln number.

FEMA Public Assistance, Grafton County

$53.0M

Federal share obligated across 611 projects in 16 declared disasters since 2010. The largest category is roads & bridges (41%); roads & bridges took $21.5M.
Dams, disasters & moving ground

04 · Next door

Lincoln and the 6 towns that border it

A dash means no data for that layer, not zero.
Lincoln compared with neighbouring towns
TownPoor bridgesRock depth
Lincoln, NH0 / 3140 ft
Woodstock, NH5 / 3140 ft
Franconia, NH1 / 2343 ft
Thornton, NH1 / 2142 ft
Bethlehem, NH2 / 1735 ft
Easton, NH1 / 849 ft
Livermore, NH0 / 7—

Where these numbers come from

Method, sources & caveats

Lincoln is the Census county subdivision 3300941860 (Grafton County). Every record is placed here by its coordinates, not by the place name the source uses.

  • Towns are Census county subdivisions: cities, towns, plantations, and Maine/New Hampshire unorganized territories and townships. Every record is placed in a town by its coordinates (point-in-polygon), not by the source's own place label — so a bridge in Roxbury counts for Boston and a well in 'North Waltham' counts for Waltham.
  • Bridges: FHWA NBI 2025, highway structures ≥ 20 ft including large culverts. 'Poor' is FHWA's good/fair/poor rating (lowest of deck, superstructure, substructure or culvert ≤ 4). Percent-poor is shown only for towns with at least 5 structures.
  • Depth to bedrock is the median of driller- and boring-reported depths in the town, shown only where at least 10 logs exist. Water-well logs over-sample rural lots and hilltops; one town median never describes a particular site.
  • Bedrock depths use the same state databases and filters as the Bedrock & soils module (bedrock wells and borings that reached rock, 0 < depth ≤ 400 ft, exact re-filings dropped), but every log is placed in a town by its coordinates rather than the driller's town field, so town counts can differ slightly between the two pages. Connecticut and Rhode Island have no statewide public well-log database with depths.
  • Dams: only high-hazard-potential dams whose latest condition assessment is Poor or Unsatisfactory are counted (live NID). Connecticut and Rhode Island assessments may lag.
  • FEMA Public Assistance dollars are federal share obligated for disasters declared since 2010, reported by county — they are county context, not a town figure.
  • Grant awards are Massachusetts only (EEA Dam & Seawall program, MVP Action grants, CZM Coastal Resilience). Other states' programs are not yet included.
  • Ground-related permit counts cover only the municipal portals the pipeline reads (Boston, Cambridge, Somerville, Worcester, Framingham, Providence, Portsmouth, Hartford and a few others) — an absent count means 'not covered', not zero.
Data as of
Sep 11, 2026
Generated
Sep 11, 2026
Records
367,748
Refresh
Live pull · weekly

Published by Earth Support Corp as a public resource. Regional statistics for planning and curiosity. They are not an engineering report, a bid recommendation or a statement about any particular site, firm or project. Spot an error? Tell us and we will correct it. Full method: methodology.

CallStart Quote