US Bridges

US-285 South over Black River

Good

Eddy County, New Mexico · 17.1 M N of Tx Line · Structure no. 000000000009844

Built
2023
2 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
328 ft
3 main spans
Daily traffic
4,786
2023 count
Owner
State
State Highway Agency

About this bridge

US-285 South over Black River is a prestressed concrete continuous stringer/multi-beam or girder carrying US-285 South over Black River in Eddy County, New Mexico. It was built in 2023, so it is 2 years old, younger than the New Mexico average of 51.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,786 vehicles a day, projected to reach 6,508 by 2042. The structure is 328 ft (100.1 m) long and 37 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesUS-285 South
CrossesBlack River
Location17.1 M N of Tx Line
RouteU.S. Route 285
Coordinates32.23534, -110.67908
Functional classRural Principal Arterial - Other

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating109.9 US tons
Inventory rating45.3 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length328 ft (100.1 m)
Longest span114 ft (34.8 m)
Deck width37 ft (11.3 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic4,786 (2023)
Projected traffic6,508 by 2042
Trucks—
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkSTRAHNET connector

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US-285 South over Black River built?

It was built in 2023, making it 2 years old in 2025.

What condition is US-285 South over Black River 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 December 2023.

How much traffic does US-285 South over Black River carry?

About 4,786 vehicles per day (2023 count).

How long is US-285 South over Black River?

The structure is 328 ft (100.1 m) long with a longest span of 114 ft (34.8 m) and a deck 37 ft wide.

Who owns US-285 South over Black River?

It is owned by the State Highway Agency.