Structure 26301450005300 · Merrimack County, NH

Nh103 over Warner River

Carries Nh103 over Warner River, 0.1 Mi From Jct I-89.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating5/9 · Fair
Substructuresets the rating5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT81 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9 · sets the ratingSubstructure 5/9 · sets the rating

81 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 girder bridge.

Built1936rebuilt 1991
Length81.0 ft24.7 m
Daily traffic3,778counted 2023
Last inspectedJune 2023every 24 months

Location

StateNew Hampshire
CountyMerrimack
Location0.1 Mi From Jct I-89
CarriesNh103
CrossesWarner River
Coordinates43.28706, -71.88797

Physical Characteristics

MaterialSteel
DesignGirder and Floorbeam
Total Length81.0 ft (24.7 m)
Max Span70.9 ft (21.6 m)
Deck Width32.2 ft (9.8 m)
Deck Area242.1 sq m
Main Spans1
Year Built1936 (reconstructed 1991)

Traffic

Avg Daily Traffic3,778 (2023)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical8 — Stable, low risk
Structure Number026301450005300

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