US Bridges

RTE 987D over Trib Chappaqua Brook

Fair

Westchester County, New York · 4.2 MI N JCT Rts Smrp&tsp · Structure no. 000000005500920

Built
1931
94 years old
Condition
Fair
inspected July 2024
Type
Arch - Deck
Concrete
Length
30 ft
1 main span
Daily traffic
26,715
2021 count
Owner
State
State Highway Agency

About this bridge

RTE 987D over Trib Chappaqua Brook is a concrete arch - deck carrying RTE 987D over Trib Chappaqua Brook in Westchester County, New York. It was built in 1931, so it is 94 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.

It carries about 26,715 vehicles a day, roughly 1% of them trucks, projected to reach 37,686 by 2041. The structure is 30 ft (9.1 m) long and 50 ft wide. If it were closed, the detour would be 7.5 mi (12 km).

Location

Open in Google Maps
CarriesRTE 987D
CrossesTrib Chappaqua Brook
Location4.2 MI N JCT Rts Smrp&tsp
CountyWestchester County
StateNew York
Coordinates41.17256, -73.76504
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

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

ComponentRatingMeaning
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating75.6 US tons
Inventory rating20.2 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length30 ft (9.1 m)
Longest span26 ft (7.9 m)
Deck width50 ft (15.2 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,715 (2021)
Projected traffic37,686 by 2041
Trucks1%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed7.5 mi (12 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$1.8 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 987D over Trib Chappaqua Brook built?

It was built in 1931, making it 94 years old in 2025.

What condition is RTE 987D over Trib Chappaqua Brook 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 July 2024.

How much traffic does RTE 987D over Trib Chappaqua Brook carry?

About 26,715 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is RTE 987D over Trib Chappaqua Brook?

The structure is 30 ft (9.1 m) long with a longest span of 26 ft (7.9 m) and a deck 50 ft wide.

Who owns RTE 987D over Trib Chappaqua Brook?

It is owned by the State Highway Agency.