US Bridges

Gravel Road over Low Flow Canal

Fair

Socorro County, New Mexico · San Marcial Nm · Structure no. 0401-San Mar

Built
1987
38 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
82 ft
1 main span
Daily traffic
20
2008 count
Owner
Federal
Bureau of Reclamation

About this bridge

Gravel Road over Low Flow Canal is a prestressed concrete stringer/multi-beam or girder carrying Gravel Road over Low Flow Canal in Socorro County, New Mexico. It was built in 1987, so it is 38 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 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 20 vehicles a day, projected to reach 20 by 2035. The structure is 82 ft (25.1 m) long and 21 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesGravel Road
CrossesLow Flow Canal
LocationSan Marcial Nm
RouteFederal Lands Road 0
Coordinates33.69824, -106.97659
Functional classRural Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum 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 alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating64.6 US tons
Inventory rating50 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length82 ft (25.1 m)
Longest span80 ft (24.4 m)
Deck width21 ft (6.4 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2008)
Projected traffic20 by 2035
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Reclamation
Maintained byBureau of Reclamation
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 Gravel Road over Low Flow Canal built?

It was built in 1987, making it 38 years old in 2025.

What condition is Gravel Road over Low Flow Canal 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 November 2024.

How much traffic does Gravel Road over Low Flow Canal carry?

About 20 vehicles per day (2008 count).

How long is Gravel Road over Low Flow Canal?

The structure is 82 ft (25.1 m) long with a longest span of 80 ft (24.4 m) and a deck 21 ft wide.

Who owns Gravel Road over Low Flow Canal?

It is owned by the Bureau of Reclamation.