US Bridges

Pattersonville RD over Terwilleger Creek

Fair

Montgomery County, New York · 2.5 MI SE of Amsterdam · Structure no. 000000003310220

Built
1929
96 years old
Condition
Fair
inspected March 2023
Type
Arch - Deck
Concrete
Length
70 ft
1 main span
Daily traffic
222
2019 count
Owner
County
County Highway Agency

About this bridge

Pattersonville RD over Terwilleger Creek is a concrete arch - deck carrying Pattersonville RD over Terwilleger Creek in Montgomery County, New York. It was built in 1929, so it is 96 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 6 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 222 vehicles a day, roughly 9% of them trucks, projected to reach 311 by 2039. The structure is 70 ft (21.3 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesPattersonville RD
CrossesTerwilleger Creek
Location2.5 MI SE of Amsterdam
RouteCounty Highway 0
Coordinates42.91563, -74.15335
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating49.3 US tons
Inventory rating19.2 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length70 ft (21.3 m)
Longest span68 ft (20.7 m)
Deck width28 ft (8.6 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic222 (2019)
Projected traffic311 by 2039
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$1.6 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Pattersonville RD over Terwilleger Creek built?

It was built in 1929, making it 96 years old in 2025.

What condition is Pattersonville 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 March 2023.

How much traffic does Pattersonville RD over Terwilleger Creek carry?

About 222 vehicles per day (2019 count), of which roughly 9% are trucks.

How long is Pattersonville RD over Terwilleger Creek?

The structure is 70 ft (21.3 m) long with a longest span of 68 ft (20.7 m) and a deck 28 ft wide.

Who owns Pattersonville RD over Terwilleger Creek?

It is owned by the County Highway Agency.