US Bridges

RTE 100 over Muscoot Reservoir

Good

Westchester County, New York · 1.2 MI N JCT Rts 100+35 · Structure no. 000000001036150

Built
1966
59 years old, rebuilt 1993
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
131 ft
1 main span
Daily traffic
9,885
2016 count
Owner
State
State Highway Agency

About this bridge

RTE 100 over Muscoot Reservoir is a steel stringer/multi-beam or girder carrying RTE 100 over Muscoot Reservoir in Westchester County, New York. It was built in 1966 and reconstructed in 1993, so it is 59 years old, older than the New York average of 53 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 9,885 vehicles a day, roughly 8% of them trucks, projected to reach 12,008 by 2041. The structure is 131 ft (39.9 m) long and 40 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesRTE 100
CrossesMuscoot Reservoir
Location1.2 MI N JCT Rts 100+35
RouteState Highway 100
CountyWestchester County
StateNew York
Coordinates41.27164, -73.71275
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating83 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length131 ft (39.9 m)
Longest span127 ft (38.7 m)
Deck width40 ft (12.2 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,885 (2016)
Projected traffic12,008 by 2041
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$4.1 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 100 over Muscoot Reservoir built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 1993.

What condition is RTE 100 over Muscoot Reservoir in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.

How much traffic does RTE 100 over Muscoot Reservoir carry?

About 9,885 vehicles per day (2016 count), of which roughly 8% are trucks.

How long is RTE 100 over Muscoot Reservoir?

The structure is 131 ft (39.9 m) long with a longest span of 127 ft (38.7 m) and a deck 40 ft wide.

Who owns RTE 100 over Muscoot Reservoir?

It is owned by the State Highway Agency.