Structure 17701150012000 · Hillsborough County, NH

Baldwin Street over Broad ST PKWY Csx

Carries Baldwin Street over Broad ST PKWY Csx, 0.18 Mi Fr Fairmont ST.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructure8/9 · Very Good
Substructure8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT201 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 8/9

201 ft end to end, longest span 104 ft: about 3 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.

Built201412 years old
Length201.1 ft61.3 m
Daily traffic2,000counted 2023
Last inspectedAugust 2023every 24 months

Location

StateNew Hampshire
CountyHillsborough
Location0.18 Mi Fr Fairmont ST
CarriesBaldwin Street
CrossesBroad ST PKWY Csx
Coordinates42.76700, -71.47726

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length201.1 ft (61.3 m)
Max Span104.0 ft (31.7 m)
Deck Width35.1 ft (10.7 m)
Deck Area655.9 sq m
Main Spans2
Year Built2014

Traffic

Avg Daily Traffic2,000 (2023)
Truck Traffic4%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number017701150012000

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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