Structure 17400810010600 · Grafton County, NH

Mcindoes Street over Connecticut River

Carries Mcindoes Street over Connecticut River, Vermont State Line.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT308 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

308 ft end to end: about 4 semi-trucks nose to tail. 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 through truss.

Built1930rebuilt 2006
Length308.1 ft93.9 m
Daily traffic444counted 2023
Last inspectedJune 2023every 24 months

Location

StateNew Hampshire
CountyGrafton
LocationVermont State Line
CarriesMcindoes Street
CrossesConnecticut River
Coordinates44.26154, -72.05891

Physical Characteristics

MaterialSteel
DesignTruss - Thru
Total Length308.1 ft (93.9 m)
Max Span305.1 ft (93 m)
Deck Width22.6 ft (6.9 m)
Deck Area647.9 sq m
Main Spans1
Year Built1930 (reconstructed 2006)

Traffic

Avg Daily Traffic444 (2023)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number017400810010600

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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