US Bridges

RTE 987G over Rock City Road

Fair

Columbia County, New York · 1.3 MI W of E Chatham · Structure no. 000000005502612

Built
1960
65 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
124 ft
3 main spans
Daily traffic
1,868
2018 count
Owner
State
State Highway Agency

About this bridge

RTE 987G over Rock City Road is a steel stringer/multi-beam or girder carrying RTE 987G over Rock City Road in Columbia County, New York. It was built in 1960, so it is 65 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 1,868 vehicles a day, roughly 1% of them trucks, projected to reach 4,480 by 2041. The structure is 124 ft (37.8 m) long and 36 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesRTE 987G
CrossesRock City Road
Location1.3 MI W of E Chatham
RouteState Highway 987G
CountyColumbia County
StateNew York
Coordinates42.40639, -73.54868
Functional classRural Principal Arterial - Other

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73 US tons
Inventory rating43 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length124 ft (37.8 m)
Longest span39 ft (11.8 m)
Deck width36 ft (11 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,868 (2018)
Projected traffic4,480 by 2041
Trucks1%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$3.1 million (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was RTE 987G over Rock City Road built?

It was built in 1960, making it 65 years old in 2025.

What condition is RTE 987G over Rock City Road 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 June 2023.

How much traffic does RTE 987G over Rock City Road carry?

About 1,868 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is RTE 987G over Rock City Road?

The structure is 124 ft (37.8 m) long with a longest span of 39 ft (11.8 m) and a deck 36 ft wide.

Who owns RTE 987G over Rock City Road?

It is owned by the State Highway Agency.