US Bridges

Nysta Exit 21B over 87IX RTE I87

Poor

Greene County, New York · Nys Thruway Exit 21B · Structure no. 000000005513279

Built
1972
53 years old, rebuilt 1998
Condition
Poor
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
205 ft
2 main spans
Daily traffic
2,264
2018 count
Owner
Toll Authority
State Toll Authority

About this bridge

Nysta Exit 21B over 87IX RTE I87 is a steel stringer/multi-beam or girder carrying Nysta Exit 21B over 87IX RTE I87 in Greene County, New York. It was built in 1972 and reconstructed in 1998, so it is 53 years old, younger 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 2,264 vehicles a day, roughly 27% of them trucks, projected to reach 2,696 by 2041. The structure is 205 ft (62.5 m) long and 60 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesNysta Exit 21B
Crosses87IX RTE I87
LocationNys Thruway Exit 21B
Coordinates42.39365, -73.82479
Functional classRural Principal Arterial - Interstate

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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.9 US tons
Inventory rating41.4 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length205 ft (62.5 m)
Longest span100 ft (30.5 m)
Deck width60 ft (18.3 m)
Roadway width57 ft (17.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,264 (2018)
Projected traffic2,696 by 2041
Trucks27%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.8 mi (11 km)
TollOn an Interstate toll segment under Secretarial agreement
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$5.3 million (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nysta Exit 21B over 87IX RTE I87 built?

It was built in 1972, making it 53 years old in 2025. It was reconstructed in 1998.

What condition is Nysta Exit 21B over 87IX RTE I87 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 March 2024.

How much traffic does Nysta Exit 21B over 87IX RTE I87 carry?

About 2,264 vehicles per day (2018 count), of which roughly 27% are trucks.

How long is Nysta Exit 21B over 87IX RTE I87?

The structure is 205 ft (62.5 m) long with a longest span of 100 ft (30.5 m) and a deck 60 ft wide.

Who owns Nysta Exit 21B over 87IX RTE I87?

It is owned by the State Toll Authority.