US Bridges

County Road 11 over Snake Arroyo

Fair

Baca County, Colorado · 2 MI S of CR Vv · Structure no. BA12-12-40-16

Built
1935
90 years old
Condition
Fair
inspected April 2024
Type
Arch - Deck
Masonry
Length
27 ft
2 main spans
Daily traffic
11
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 11 over Snake Arroyo is a masonry arch - deck carrying County Road 11 over Snake Arroyo in Baca County, Colorado. It was built in 1935, so it is 90 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 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 11 vehicles a day, projected to reach 13 by 2042. The structure is 27 ft (8.2 m) long and 26 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesCounty Road 11
CrossesSnake Arroyo
Location2 MI S of CR Vv
RouteCounty Highway 0
CountyBaca County
StateColorado
Coordinates37.58774, -102.87482
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to 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 alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating36 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckNot applicable
Main spans2
Design loadUnknown
Structure length27 ft (8.2 m)
Longest span12 ft (3.7 m)
Deck width26 ft (8 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11 (2022)
Projected traffic13 by 2042
Trucks0%
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

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 11 over Snake Arroyo built?

It was built in 1935, making it 90 years old in 2025.

What condition is County Road 11 over Snake 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 11 over Snake Arroyo carry?

About 11 vehicles per day (2022 count).

How long is County Road 11 over Snake Arroyo?

The structure is 27 ft (8.2 m) long with a longest span of 12 ft (3.7 m) and a deck 26 ft wide.

Who owns County Road 11 over Snake Arroyo?

It is owned by the County Highway Agency.