US Bridges

RTE 9N over Grove Brook

Fair

Essex County, New York · 9N 1.7 MI S Port Henry · Structure no. 000000001053570

Built
1941
84 years old, rebuilt 2012
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
34 ft
1 main span
Daily traffic
3,967
2021 count
Owner
State
State Highway Agency

About this bridge

RTE 9N over Grove Brook is a steel stringer/multi-beam or girder carrying RTE 9N over Grove Brook in Essex County, New York. It was built in 1941 and reconstructed in 2012, so it is 84 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 3,967 vehicles a day, roughly 8% of them trucks, projected to reach 4,444 by 2041. The structure is 34 ft (10.4 m) long and 34 ft wide. If it were closed, the detour would be 39.8 mi (64 km).

Location

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CarriesRTE 9N
CrossesGrove Brook
Location9N 1.7 MI S Port Henry
RouteU.S. Route 9N
CountyEssex County
StateNew York
Coordinates44.01094, -73.45618
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating102 US tons
Inventory rating61 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span33 ft (10.1 m)
Deck width34 ft (10.3 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,967 (2021)
Projected traffic4,444 by 2041
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed39.8 mi (64 km)
TollOn a free road
National Highway SystemYes

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$880,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 9N over Grove Brook built?

It was built in 1941, making it 84 years old in 2025. It was reconstructed in 2012.

What condition is RTE 9N over Grove 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 June 2024.

How much traffic does RTE 9N over Grove Brook carry?

About 3,967 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is RTE 9N over Grove Brook?

The structure is 34 ft (10.4 m) long with a longest span of 33 ft (10.1 m) and a deck 34 ft wide.

Who owns RTE 9N over Grove Brook?

It is owned by the State Highway Agency.