Structure 6501130011200 · Strafford County, NH

Nh 16 Sp Tpk NB over Bmrr

Carries Nh 16 Sp Tpk NB over Bmrr, .4 Mi. From Jct RT 9.

Overall conditionFair

Set by its lowest-rated component: Deck at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT145 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

145 ft end to end, longest span 55 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.

Built1957rebuilt 1992
Length145.0 ft44.2 m
Daily traffic22,560counted 2023
Last inspectedApril 2023every 24 months

Location

StateNew Hampshire
CountyStrafford
Location.4 Mi. From Jct RT 9
CarriesNh 16 Sp Tpk NB
CrossesBmrr
Coordinates43.19065, -70.89156

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length145.0 ft (44.2 m)
Max Span55.1 ft (16.8 m)
Deck Width47.2 ft (14.4 m)
Deck Area636.5 sq m
Main Spans3
Year Built1957 (reconstructed 1992)

Traffic

Avg Daily Traffic22,560 (2023)
Truck Traffic8%
Lanes On Bridge3

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerState Toll Authority
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour CriticalNot applicable
Structure Number006501130011200

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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