Structure 17302120012800 · Strafford County, NH

Nh125 over Nhncrr

Carries Nh125 over Nhncrr, 1.9 Mi From Rochester Tl.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 8 of 9.

How ratings work
Decksets the rating8/9 · Very Good
Superstructuresets the rating8/9 · Very Good
Substructuresets the rating8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT151 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 8/9

151 ft end to end, longest span 54 ft: 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 multi-beam bridge.

Built1954rebuilt 2011
Length150.9 ft46 m
Daily traffic5,656counted 2023
Last inspectedJune 2023every 24 months

Location

StateNew Hampshire
CountyStrafford
Location1.9 Mi From Rochester Tl
CarriesNh125
CrossesNhncrr
Coordinates43.40423, -70.98917

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length150.9 ft (46 m)
Max Span54.1 ft (16.5 m)
Deck Width34.4 ft (10.5 m)
Deck Area483 sq m
Main Spans3
Year Built1954 (reconstructed 2011)

Traffic

Avg Daily Traffic5,656 (2023)
Truck Traffic7%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour CriticalNot applicable
Structure Number017302120012800

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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