Structure 6501130011100 · Strafford County, NH

Nh 16 Sp Tpk SB over Bmrr

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

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT146 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

146 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
Length146.0 ft44.5 m
Daily traffic23,607counted 2023
Last inspectedApril 2023every 24 months

Location

StateNew Hampshire
CountyStrafford
Location.4 Mi. From Jct. RT 9
CarriesNh 16 Sp Tpk SB
CrossesBmrr
Coordinates43.19054, -70.89171

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length146.0 ft (44.5 m)
Max Span55.1 ft (16.8 m)
Deck Width50.2 ft (15.3 m)
Deck Area680.9 sq m
Main Spans3
Year Built1957 (reconstructed 1992)

Traffic

Avg Daily Traffic23,607 (2023)
Truck Traffic8%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerState Toll Authority
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour CriticalNot applicable
Structure Number006501130011100

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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