Structure 2801260015000 · Merrimack County, NH

Water Street over West Branch Brook

Carries Water Street over West Branch Brook, .12 Mi From Old Warren R.

Overall conditionFair

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

How ratings work
Deck8/9 · Very Good
Superstructure8/9 · Very Good
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 FT31 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 5/9 · sets the rating

31 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 slab bridge.

Built1980rebuilt 2017
Length31.2 ft9.5 m
Daily traffic349counted 2023
Last inspectedSeptember 2023every 24 months

Location

StateNew Hampshire
CountyMerrimack
Location.12 Mi From Old Warren R
CarriesWater Street
CrossesWest Branch Brook
Coordinates43.26804, -71.96647

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length31.2 ft (9.5 m)
Max Span27.2 ft (8.3 m)
Deck Width19.4 ft (5.9 m)
Deck Area56.0 sq m
Main Spans1
Year Built1980 (reconstructed 2017)

Traffic

Avg Daily Traffic349 (2023)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical8 — Stable, low risk
Structure Number002801260015000

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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