Structure 12001490011100 · Merrimack County, NH

Concord Road over Amey Brook

Carries Concord Road over Amey Brook, 2.2 Mi Fr Hopkinton Tl.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT84 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 7/9 · sets the rating

84 ft end to end, longest span 30 ft. 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.

Built1938rebuilt 1997
Length84.0 ft25.6 m
Daily traffic1,984counted 2023
Last inspectedJuly 2023every 24 months

Location

StateNew Hampshire
CountyMerrimack
Location2.2 Mi Fr Hopkinton Tl
CarriesConcord Road
CrossesAmey Brook
Coordinates43.18378, -71.79407

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length84.0 ft (25.6 m)
Max Span29.9 ft (9.1 m)
Deck Width32.2 ft (9.8 m)
Deck Area250.9 sq m
Main Spans3
Year Built1938 (reconstructed 1997)

Traffic

Avg Daily Traffic1,984 (2023)
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical3 — Scour critical
Structure Number012001490011100

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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