US Bridges

Ra County RD-322 over Rock Lake Creek

Fair

Rio Arriba County, New Mexico · 15.7 MI W US 64/84 Parkvi · Structure no. 000000000008966

Built
1997
28 years old
Condition
Fair
inspected November 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
62 ft
1 main span
Daily traffic
166
2023 count
Owner
County
County Highway Agency

About this bridge

Ra County RD-322 over Rock Lake Creek is a prestressed concrete stringer/multi-beam or girder carrying Ra County RD-322 over Rock Lake Creek in Rio Arriba County, New Mexico. It was built in 1997, so it is 28 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 166 vehicles a day, projected to reach 225 by 2043. The structure is 62 ft (19 m) long and 30 ft wide. If it were closed, the detour would be 49.7 mi (80 km).

Location

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CarriesRa County RD-322
CrossesRock Lake Creek
Location15.7 MI W US 64/84 Parkvi
RouteState Highway 95
CountyRio Arriba County
StateNew Mexico
Coordinates36.66447, -106.77191
Functional classRural Local

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2022
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 adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating54.9 US tons
Inventory rating33 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length62 ft (19 m)
Longest span59 ft (18 m)
Deck width30 ft (9 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic166 (2023)
Projected traffic225 by 2043
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed49.7 mi (80 km)
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ra County RD-322 over Rock Lake Creek built?

It was built in 1997, making it 28 years old in 2025.

What condition is Ra County RD-322 over Rock Lake Creek 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 2022.

How much traffic does Ra County RD-322 over Rock Lake Creek carry?

About 166 vehicles per day (2023 count).

How long is Ra County RD-322 over Rock Lake Creek?

The structure is 62 ft (19 m) long with a longest span of 59 ft (18 m) and a deck 30 ft wide.

Who owns Ra County RD-322 over Rock Lake Creek?

It is owned by the County Highway Agency.