US Bridges

County Road 430 over Rio Grande River

FairPosted for load

Mineral County, Colorado · 0.8 MI SE of Riverside Me · Structure no. MIN430-0.1-1

Built
1930
95 years old
Condition
Fair
inspected October 2024
Type
Truss - Thru
Steel
Length
119 ft
1 main span
Daily traffic
47
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 430 over Rio Grande River is a steel truss - thru carrying County Road 430 over Rio Grande River in Mineral County, Colorado. It was built in 1930, so it is 95 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. Its operating status is: posted for load restriction.

It carries about 47 vehicles a day, projected to reach 57 by 2042. The structure is 119 ft (36.4 m) long and 20 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesCounty Road 430
CrossesRio Grande River
Location0.8 MI SE of Riverside Me
RouteCounty Highway 0
CountyMineral County
StateColorado
Coordinates37.72751, -106.71636
Functional classRural Local

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.
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 inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating21.9 US tons
Inventory rating13.1 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1 (+1 approach)
Design loadUnknown
Structure length119 ft (36.4 m)
Longest span99 ft (30.3 m)
Deck width20 ft (6.2 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic47 (2022)
Projected traffic57 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 430 over Rio Grande River built?

It was built in 1930, making it 95 years old in 2025.

What condition is County Road 430 over Rio Grande River 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 October 2024.

How much traffic does County Road 430 over Rio Grande River carry?

About 47 vehicles per day (2022 count).

How long is County Road 430 over Rio Grande River?

The structure is 119 ft (36.4 m) long with a longest span of 99 ft (30.3 m) and a deck 20 ft wide.

Who owns County Road 430 over Rio Grande River?

It is owned by the County Highway Agency.