Structure 21601410014300 · Grafton County, NH

US 3 Nh 25 over Baker River

Carries US 3 Nh 25 over Baker River, 4.3 Mi FM Bridgewater Tl.

Overall conditionFair

Set by its lowest-rated component: Superstructure at 5 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating5/9 · Fair
Substructure6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT172 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9 · sets the ratingSubstructure 6/9

172 ft end to end: about 2 semi-trucks nose to tail. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a through truss.

Built1930rebuilt 1985
Length171.9 ft52.4 m
Daily traffic4,355counted 2023
Last inspectedJune 2023every 24 months

Location

StateNew Hampshire
CountyGrafton
Location4.3 Mi FM Bridgewater Tl
CarriesUS 3 Nh 25
CrossesBaker River
Coordinates43.76826, -71.68605

Physical Characteristics

MaterialSteel
DesignTruss - Thru
Total Length171.9 ft (52.4 m)
Max Span168.0 ft (51.2 m)
Deck Width25.6 ft (7.8 m)
Deck Area408.7 sq m
Main Spans1
Year Built1930 (reconstructed 1985)

Traffic

Avg Daily Traffic4,355 (2023)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number021601410014300

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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