US Bridges

County Road 4175 over Gravel Road

Good

Delta County, Colorado · .1 MI S of SH 133 · Structure no. DEL4175D16.1-62

Built
1979
46 years old
Condition
Good
inspected September 2023
Type
Culvert
Steel
Length
26 ft
1 main span
Daily traffic
286
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 4175 over Gravel Road is a steel culvert carrying County Road 4175 over Gravel Road in Delta County, Colorado. It was built in 1979, so it is 46 years old, older 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 286 vehicles a day, roughly 2% of them trucks, projected to reach 323 by 2042. The structure is 26 ft (8 m) long and 123 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCounty Road 4175
CrossesGravel Road
Location.1 MI S of SH 133
RouteCounty Highway 0
CountyDelta County
StateColorado
Coordinates38.885, -107.58647
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Culvert7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHS 20
Structure length26 ft (8 m)
Longest span26 ft (8 m)
Deck width123 ft (37.5 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic286 (2022)
Projected traffic323 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesOther
Detour if closed3.1 mi (5 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 4175 over Gravel Road built?

It was built in 1979, making it 46 years old in 2025.

What condition is County Road 4175 over Gravel Road 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 September 2023.

How much traffic does County Road 4175 over Gravel Road carry?

About 286 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is County Road 4175 over Gravel Road?

The structure is 26 ft (8 m) long with a longest span of 26 ft (8 m) and a deck 123 ft wide.

Who owns County Road 4175 over Gravel Road?

It is owned by the County Highway Agency.