US Bridges

County Road 117 over Tomhannock Spillway

Fair

Rensselaer County, New York · 2.8 MI NE of Melrose · Structure no. 000000003303400

Built
1935
90 years old, rebuilt 2014
Condition
Fair
inspected August 2024
Type
Truss - Thru
Steel
Length
83 ft
1 main span
Daily traffic
962
2019 count
Owner
County
County Highway Agency

About this bridge

County Road 117 over Tomhannock Spillway is a steel truss - thru carrying County Road 117 over Tomhannock Spillway in Rensselaer County, New York. It was built in 1935 and reconstructed in 2014, so it is 90 years old, older than the New York average of 53 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 962 vehicles a day, roughly 4% of them trucks, projected to reach 1,347 by 2039. The structure is 83 ft (25.3 m) long and 23 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesCounty Road 117
CrossesTomhannock Spillway
Location2.8 MI NE of Melrose
RouteCounty Highway 0
CountyRensselaer County
StateNew York
Coordinates42.8694, -73.58722
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating99.6 US tons
Inventory rating36 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckSteel plate
Main spans1
Design loadHS 20
Structure length83 ft (25.3 m)
Longest span82 ft (24.9 m)
Deck width23 ft (7 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic962 (2019)
Projected traffic1,347 by 2039
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$2.7 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 117 over Tomhannock Spillway built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 2014.

What condition is County Road 117 over Tomhannock Spillway in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2024.

How much traffic does County Road 117 over Tomhannock Spillway carry?

About 962 vehicles per day (2019 count), of which roughly 4% are trucks.

How long is County Road 117 over Tomhannock Spillway?

The structure is 83 ft (25.3 m) long with a longest span of 82 ft (24.9 m) and a deck 23 ft wide.

Who owns County Road 117 over Tomhannock Spillway?

It is owned by the County Highway Agency.