Structure 3303400 · Rensselaer County, NY

County Road 117 over Tomhannock Spillway

Carries County Road 117 over Tomhannock Spillway, 2.8 Mi NE Of Melrose.

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 overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT83 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

83 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.

Built1935rebuilt 2014
Length83.0 ft25.3 m
Daily traffic962counted 2019
Last inspectedAugust 2024every 24 months

Location

StateNew York
CountyRensselaer
Location2.8 Mi NE Of Melrose
CarriesCounty Road 117
CrossesTomhannock Spillway
Coordinates42.86940, -73.58722

Physical Characteristics

MaterialSteel
DesignTruss - Thru
Total Length83.0 ft (25.3 m)
Max Span81.7 ft (24.9 m)
Deck Width23.0 ft (7 m)
Deck Area177.1 sq m
Main Spans1
Year Built1935 (reconstructed 2014)

Traffic

Avg Daily Traffic962 (2019)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000003303400

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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