Structure 21702570012700 · Rockingham County, NH

I-95 over Preble Way Csx

Carries I-95 over Preble Way Csx, Approach To High Level Br.

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 FT1,810 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

1,810 ft end to end, longest span 112 ft: about 5.0 football fields. 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.

Built197155 years old
Length1810.0 ft551.7 m
Daily traffic74,766counted 2023
Last inspectedJune 2023every 24 months

Location

StateNew Hampshire
CountyRockingham
LocationApproach To High Level Br
CarriesI-95
CrossesPreble Way Csx
Coordinates43.08971, -70.77101

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length1810.0 ft (551.7 m)
Max Span111.9 ft (34.1 m)
Deck Width104.7 ft (31.9 m)
Deck Area17599.2 sq m
Main Spans19
Year Built1971

Traffic

Avg Daily Traffic74,766 (2023)
Truck Traffic6%
Lanes On Bridge6
Lanes Under Bridge4

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerState Toll Authority
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number021702570012700

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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