US Bridges

County Road 120 over Sandy Arroyo

Good

Huerfano County, Colorado · 3.8 MI N of SH 10 · Structure no. HU120-2.7-S10A

Built
1995
30 years old
Condition
Good
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
85 ft
1 main span
Daily traffic
65
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 120 over Sandy Arroyo is a steel stringer/multi-beam or girder carrying County Road 120 over Sandy Arroyo in Huerfano County, Colorado. It was built in 1995, so it is 30 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 65 vehicles a day, projected to reach 76 by 2042. The structure is 85 ft (25.9 m) long and 32 ft wide. If it were closed, the detour would be 26.1 mi (42 km).

Location

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CarriesCounty Road 120
CrossesSandy Arroyo
Location3.8 MI N of SH 10
RouteCounty Highway 0
CountyHuerfano County
StateColorado
Coordinates37.70298, -104.67773
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
Deck9 ExcellentNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating45.7 US tons
Inventory rating27.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length85 ft (25.9 m)
Longest span80 ft (24.4 m)
Deck width32 ft (9.8 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic65 (2022)
Projected traffic76 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed26.1 mi (42 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 120 over Sandy Arroyo built?

It was built in 1995, making it 30 years old in 2025.

What condition is County Road 120 over Sandy 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 January 2025.

How much traffic does County Road 120 over Sandy Arroyo carry?

About 65 vehicles per day (2022 count).

How long is County Road 120 over Sandy Arroyo?

The structure is 85 ft (25.9 m) long with a longest span of 80 ft (24.4 m) and a deck 32 ft wide.

Who owns County Road 120 over Sandy Arroyo?

It is owned by the County Highway Agency.