US Bridges

County Road 50 over Hamm Brook

Fair

Columbia County, New York · 0.7 MI E of Mt Ross · Structure no. 000000003222410

Built
1991
34 years old
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
73 ft
1 main span
Daily traffic
880
2021 count
Owner
County
County Highway Agency

About this bridge

County Road 50 over Hamm Brook is a prestressed concrete box beam or girders - multiple carrying County Road 50 over Hamm Brook in Columbia County, New York. It was built in 1991, so it is 34 years old, younger 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 880 vehicles a day, roughly 8% of them trucks, projected to reach 1,232 by 2041. The structure is 73 ft (22.3 m) long and 26 ft wide.

Location

Open in Google Maps
CarriesCounty Road 50
CrossesHamm Brook
Location0.7 MI E of Mt Ross
RouteCounty Highway 0
CountyColumbia County
StateNew York
Coordinates42.00416, -73.70182
Functional classRural Minor Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating60 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length73 ft (22.3 m)
Longest span70 ft (21.3 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic880 (2021)
Projected traffic1,232 by 2041
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$3 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 50 over Hamm Brook built?

It was built in 1991, making it 34 years old in 2025.

What condition is County Road 50 over Hamm 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 May 2023.

How much traffic does County Road 50 over Hamm Brook carry?

About 880 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is County Road 50 over Hamm Brook?

The structure is 73 ft (22.3 m) long with a longest span of 70 ft (21.3 m) and a deck 26 ft wide.

Who owns County Road 50 over Hamm Brook?

It is owned by the County Highway Agency.