US Bridges

County Road 430 over Conejos River

PoorPosted for load

Conejos County, Colorado · 8 MI N of SH 17 · Structure no. CON23.8W-07.5N

Built
1960
65 years old
Condition
Poor
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
127 ft
3 main spans
Daily traffic
6
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 430 over Conejos River is a steel stringer/multi-beam or girder carrying County Road 430 over Conejos River in Conejos County, Colorado. It was built in 1960, so it is 65 years old, older than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 6 vehicles a day, projected to reach 7 by 2042. The structure is 127 ft (38.8 m) long and 15 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesCounty Road 430
CrossesConejos River
Location8 MI N of SH 17
RouteCounty Highway 0
CountyConejos County
StateColorado
Coordinates37.18736, -106.44897
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating6.6 US tons
Inventory rating3.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans3
Design loadUnknown
Structure length127 ft (38.8 m)
Longest span41 ft (12.6 m)
Deck width15 ft (4.7 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6 (2022)
Projected traffic7 by 2042
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.2 million
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 430 over Conejos River built?

It was built in 1960, making it 65 years old in 2025.

What condition is County Road 430 over Conejos River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2024.

How much traffic does County Road 430 over Conejos River carry?

About 6 vehicles per day (2022 count).

How long is County Road 430 over Conejos River?

The structure is 127 ft (38.8 m) long with a longest span of 41 ft (12.6 m) and a deck 15 ft wide.

Who owns County Road 430 over Conejos River?

It is owned by the County Highway Agency.