US Bridges

Hillside Avenue over Mnrr Nh Line

PoorPosted for load

Westchester County, New York · At Mamaroneck Rye · Structure no. 000000002265250

Built
1887
138 years old, rebuilt 2015
Condition
Poor
inspected December 2024
Type
Truss - Thru
Steel
Length
63 ft
1 main span
Daily traffic
1,751
2017 count
Owner
Railroad
Railroad

About this bridge

Hillside Avenue over Mnrr Nh Line is a steel truss - thru carrying Hillside Avenue over Mnrr Nh Line in Westchester County, New York. It was built in 1887 and reconstructed in 2015, so it is 138 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. Its operating status is: posted for load restriction.

It carries about 1,751 vehicles a day, roughly 2% of them trucks, projected to reach 2,451 by 2037. The structure is 63 ft (19.2 m) long and 32 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesHillside Avenue
CrossesMnrr Nh Line
LocationAt Mamaroneck Rye
CountyWestchester County
StateNew York
Coordinates40.9568, -73.73296
Functional classUrban Local

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
Deck8 Very GoodNo problems noted.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionDecember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating14 US tons
Inventory rating8 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1 (+1 approach)
Design loadUnknown
Structure length63 ft (19.2 m)
Longest span56 ft (17.1 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,751 (2017)
Projected traffic2,451 by 2037
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerRailroad
Maintained byTown or Township Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$8.2 million (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Hillside Avenue over Mnrr Nh Line built?

It was built in 1887, making it 138 years old in 2025. It was reconstructed in 2015.

What condition is Hillside Avenue over Mnrr Nh Line 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 December 2024.

How much traffic does Hillside Avenue over Mnrr Nh Line carry?

About 1,751 vehicles per day (2017 count), of which roughly 2% are trucks.

How long is Hillside Avenue over Mnrr Nh Line?

The structure is 63 ft (19.2 m) long with a longest span of 56 ft (17.1 m) and a deck 32 ft wide.

Who owns Hillside Avenue over Mnrr Nh Line?

It is owned by the Railroad and maintained by the Town or Township Highway Agency.