US Bridges

County Road 634 over Caldwell Gulch Canyon

Fair

Huerfano County, Colorado · 5.5 MI North of SH 69 · Structure no. HU634-5.4-S69A

Built
1994
31 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
112 ft
2 main spans
Daily traffic
8
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 634 over Caldwell Gulch Canyon is a steel continuous stringer/multi-beam or girder carrying County Road 634 over Caldwell Gulch Canyon in Huerfano County, Colorado. It was built in 1994, so it is 31 years old, younger 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 8 vehicles a day, projected to reach 10 by 2042. The structure is 112 ft (34.1 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 634
CrossesCaldwell Gulch Canyon
Location5.5 MI North of SH 69
RouteCounty Highway 0
CountyHuerfano County
StateColorado
Coordinates37.86519, -105.20523
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
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 rating42.2 US tons
Inventory rating25.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckCorrugated steel
Main spans2
Design loadUnknown
Structure length112 ft (34.1 m)
Longest span52 ft (15.9 m)
Deck width28 ft (8.6 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8 (2022)
Projected traffic10 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 634 over Caldwell Gulch Canyon built?

It was built in 1994, making it 31 years old in 2025.

What condition is County Road 634 over Caldwell Gulch Canyon 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 January 2025.

How much traffic does County Road 634 over Caldwell Gulch Canyon carry?

About 8 vehicles per day (2022 count).

How long is County Road 634 over Caldwell Gulch Canyon?

The structure is 112 ft (34.1 m) long with a longest span of 52 ft (15.9 m) and a deck 28 ft wide.

Who owns County Road 634 over Caldwell Gulch Canyon?

It is owned by the County Highway Agency.