Structure 16101070007100 · Hillsborough County, NH

Ramp E(camp St) over Csx

Carries Ramp E(camp St) over Csx, 0.3 Mi W Jct US 3.

Overall conditionFair

Set by its lowest-rated component: Deck and Substructure at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT436 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 6/9Substructure 5/9 · sets the rating

436 ft end to end, longest span 70 ft: about 6 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.

Built197056 years old
Length436.0 ft132.9 m
Daily traffic3,341counted 2023
Last inspectedJuly 2024every 24 months

Location

StateNew Hampshire
CountyHillsborough
Location0.3 Mi W Jct US 3
CarriesRamp E(camp St)
CrossesCsx
Coordinates43.00274, -71.46812

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length436.0 ft (132.9 m)
Max Span69.9 ft (21.3 m)
Deck Width27.9 ft (8.5 m)
Deck Area1129.7 sq m
Main Spans6
Year Built1970

Traffic

Avg Daily Traffic3,341 (2023)
Truck Traffic8%
Lanes On Bridge1

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour CriticalNot applicable
Structure Number016101070007100

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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