US Bridges

County Road 18 over Wallkill River

Poor

Ulster County, New York · 0.3 MI W of Wallkill · Structure no. 000000003347320

Built
1915
110 years old, rebuilt 2018
Condition
Poor
inspected June 2023
Type
Arch - Deck
Concrete
Length
322 ft
3 main spans
Daily traffic
3,916
2014 count
Owner
County
County Highway Agency

About this bridge

County Road 18 over Wallkill River is a concrete arch - deck carrying County Road 18 over Wallkill River in Ulster County, New York. It was built in 1915 and reconstructed in 2018, so it is 110 years old, older than the New York average of 53 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 3,916 vehicles a day, roughly 7% of them trucks, projected to reach 4,845 by 2041. The structure is 322 ft (98.1 m) long and 30 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesCounty Road 18
CrossesWallkill River
Location0.3 MI W of Wallkill
RouteCounty Highway 0
CountyUlster County
StateNew York
Coordinates41.60618, -74.18592
Functional classRural Minor Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating87 US tons
Inventory rating52 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length322 ft (98.1 m)
Longest span104 ft (31.6 m)
Deck width30 ft (9.1 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,916 (2014)
Projected traffic4,845 by 2041
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedDeck replacement with only incidental widening
Estimated improvement cost$16 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 18 over Wallkill River built?

It was built in 1915, making it 110 years old in 2025. It was reconstructed in 2018.

What condition is County Road 18 over Wallkill River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2023.

How much traffic does County Road 18 over Wallkill River carry?

About 3,916 vehicles per day (2014 count), of which roughly 7% are trucks.

How long is County Road 18 over Wallkill River?

The structure is 322 ft (98.1 m) long with a longest span of 104 ft (31.6 m) and a deck 30 ft wide.

Who owns County Road 18 over Wallkill River?

It is owned by the County Highway Agency.