US Bridges

Thayer RD over Terwilleger Creek

FairPosted for load

Montgomery County, New York · .2 MI SE JCT CR149 &CR16 · Structure no. 000000001038800

Built
1934
91 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete Continuous
Length
28 ft
2 main spans
Daily traffic
639
2013 count
Owner
County
County Highway Agency

About this bridge

Thayer RD over Terwilleger Creek is a concrete continuous culvert carrying Thayer RD over Terwilleger Creek in Montgomery County, New York. It was built in 1934, so it is 91 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. Its operating status is: posted for load restriction.

It carries about 639 vehicles a day, roughly 5% of them trucks, projected to reach 895 by 2033. The structure is 28 ft (8.5 m) long. If it were closed, the detour would be 11.8 mi (19 km).

Location

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CarriesThayer RD
CrossesTerwilleger Creek
Location.2 MI SE JCT CR149 &CR16
RouteCounty Highway 0
CountyMontgomery County
StateNew York
Coordinates42.89685, -74.16637
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27 US tons
Inventory rating20 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 20
Structure length28 ft (8.5 m)
Longest span12 ft (3.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic639 (2013)
Projected traffic895 by 2033
Trucks5%
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 statusHistorical significance not determinable at this time
Work proposedDeck replacement with only incidental widening
Estimated improvement cost$203,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Thayer RD over Terwilleger Creek built?

It was built in 1934, making it 91 years old in 2025.

What condition is Thayer RD over Terwilleger Creek 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 April 2023.

How much traffic does Thayer RD over Terwilleger Creek carry?

About 639 vehicles per day (2013 count), of which roughly 5% are trucks.

How long is Thayer RD over Terwilleger Creek?

The structure is 28 ft (8.5 m) long with a longest span of 12 ft (3.6 m).

Who owns Thayer RD over Terwilleger Creek?

It is owned by the County Highway Agency.