Structure 1101130009300 · Grafton County, NH

River Street over Squam River

Carries River Street over Squam River, 1.4 Mi Fr Nh RTE 25.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT64 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 6/9 · sets the rating

64 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 through truss.

Built199036 years old
Length64.0 ft19.5 m
Daily traffic588counted 2023
Last inspectedOctober 2023every 24 months

Location

StateNew Hampshire
CountyGrafton
Location1.4 Mi Fr Nh RTE 25
CarriesRiver Street
CrossesSquam River
Coordinates43.71881, -71.61894

Physical Characteristics

MaterialWood or Timber
DesignTruss - Thru
Total Length64.0 ft (19.5 m)
Max Span40.0 ft (12.2 m)
Deck Width18.0 ft (5.5 m)
Deck Area107.2 sq m
Main Spans1
Year Built1990

Traffic

Avg Daily Traffic588 (2023)
Truck Traffic4%
Lanes On Bridge1

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number001101130009300

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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