US Bridges

County Road 51 over Sand Arroyo

Good

Baca County, Colorado · 0.4 MI S of CR Dd · Structure no. BA52-52-254-64A

Built
1986
39 years old
Condition
Good
inspected April 2024
Type
Culvert
Steel
Length
98 ft
20 main spans
Daily traffic
4
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 51 over Sand Arroyo is a steel culvert carrying County Road 51 over Sand Arroyo in Baca County, Colorado. It was built in 1986, so it is 39 years old, younger than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 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 vehicles a day, projected to reach 5 by 2042. The structure is 98 ft (30 m) long and 28 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesCounty Road 51
CrossesSand Arroyo
Location0.4 MI S of CR Dd
RouteCounty Highway 0
CountyBaca County
StateColorado
Coordinates37.37482, -102.14561
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Culvert7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating110.1 US tons
Inventory rating77.8 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans20
Design loadHS 20 + Mod
Structure length98 ft (30 m)
Longest span4 ft (1.1 m)
Deck width28 ft (8.6 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4 (2022)
Projected traffic5 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 County Road 51 over Sand Arroyo built?

It was built in 1986, making it 39 years old in 2025.

What condition is County Road 51 over Sand Arroyo 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 April 2024.

How much traffic does County Road 51 over Sand Arroyo carry?

About 4 vehicles per day (2022 count).

How long is County Road 51 over Sand Arroyo?

The structure is 98 ft (30 m) long with a longest span of 4 ft (1.1 m) and a deck 28 ft wide.

Who owns County Road 51 over Sand Arroyo?

It is owned by the County Highway Agency.