Structure 5201830015600 · Merrimack County, NH

North Pembroke RD over Soucook River

Carries North Pembroke RD over Soucook River, At Pembroke Tl.

Overall conditionGood

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

How ratings work
Decksets the rating9/9 · Excellent
Superstructuresets the rating9/9 · Excellent
Substructuresets the rating9/9 · Excellent
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT121 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 9/9Superstructure 9/9Substructure 9/9

121 ft end to end. 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 box-beam bridge.

Built1959rebuilt 2022
Length121.1 ft36.9 m
Daily traffic4,050counted 2023
Last inspectedJuly 2023every 24 months

Location

StateNew Hampshire
CountyMerrimack
LocationAt Pembroke Tl
CarriesNorth Pembroke RD
CrossesSoucook River
Coordinates43.21337, -71.48027

Physical Characteristics

MaterialConcrete
DesignBox Beam - Multiple
Total Length121.1 ft (36.9 m)
Max Span116.1 ft (35.4 m)
Deck Width33.1 ft (10.1 m)
Deck Area372.7 sq m
Main Spans1
Year Built1959 (reconstructed 2022)

Traffic

Avg Daily Traffic4,050 (2023)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical8 — Stable, low risk
Structure Number005201830015600

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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