Structure 12901110008200 · Merrimack County, NH

I-89 NB over Us202 Nh 9

Carries I-89 NB over Us202 Nh 9, 1.9 So Jct RT 127.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT52 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

52 ft end to end. Lengths and the car 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.

Built1959rebuilt 1993
Length51.8 ft15.8 m
Daily traffic12,106counted 2023
Last inspectedMay 2024every 24 months

Location

StateNew Hampshire
CountyMerrimack
Location1.9 So Jct RT 127
CarriesI-89 NB
CrossesUs202 Nh 9
Coordinates43.18191, -71.68821

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length51.8 ft (15.8 m)
Max Span46.9 ft (14.3 m)
Deck Width44.0 ft (13.4 m)
Deck Area211.7 sq m
Main Spans1
Year Built1959 (reconstructed 1993)

Traffic

Avg Daily Traffic12,106 (2023)
Truck Traffic9%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionMay 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number012901110008200

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.

Nearby Bridges