US Bridges

County Road 13 over South Fork Sand Arroyo

Fair

Baca County, Colorado · .1 MI N of CR R · Structure no. BA13-13-14.2-43

Built
1950
75 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
60 ft
2 main spans
Daily traffic
13
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 13 over South Fork Sand Arroyo is a steel continuous stringer/multi-beam or girder carrying County Road 13 over South Fork Sand Arroyo in Baca County, Colorado. It was built in 1950, so it is 75 years old, older than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 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 13 vehicles a day, projected to reach 16 by 2042. The structure is 60 ft (18.3 m) long and 27 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCounty Road 13
CrossesSouth Fork Sand Arroyo
Location.1 MI N of CR R
RouteCounty Highway 0
CountyBaca County
StateColorado
Coordinates37.20776, -102.85072
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.1 US tons
Inventory rating43.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length60 ft (18.3 m)
Longest span27 ft (8.1 m)
Deck width27 ft (8.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13 (2022)
Projected traffic16 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 13 over South Fork Sand Arroyo built?

It was built in 1950, making it 75 years old in 2025.

What condition is County Road 13 over South Fork Sand Arroyo 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 April 2024.

How much traffic does County Road 13 over South Fork Sand Arroyo carry?

About 13 vehicles per day (2022 count).

How long is County Road 13 over South Fork Sand Arroyo?

The structure is 60 ft (18.3 m) long with a longest span of 27 ft (8.1 m) and a deck 27 ft wide.

Who owns County Road 13 over South Fork Sand Arroyo?

It is owned by the County Highway Agency.