US Bridges

County Road M over Conejos River

PoorPosted for load

Conejos County, Colorado · .3 MI NE of CR 19 · Structure no. CON06.3E-04.7NA

Built
1987
38 years old
Condition
Poor
inspected March 2023
Type
Truss - Thru
Steel
Length
101 ft
1 main span
Daily traffic
118
2022 count
Owner
County
County Highway Agency

About this bridge

County Road M over Conejos River is a steel truss - thru carrying County Road M over Conejos River in Conejos County, Colorado. It was built in 1987, so it is 38 years old, younger 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 118 vehicles a day, roughly 2% of them trucks, projected to reach 136 by 2042. The structure is 101 ft (30.9 m) long and 20 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesCounty Road M
CrossesConejos River
Location.3 MI NE of CR 19
RouteCounty Highway 0
Coordinates37.15029, -105.90731
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating15.4 US tons
Inventory rating9.1 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length101 ft (30.9 m)
Longest span99 ft (30.2 m)
Deck width20 ft (6.1 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic118 (2022)
Projected traffic136 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.1 million (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road M over Conejos River built?

It was built in 1987, making it 38 years old in 2025.

What condition is County Road M 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 March 2023.

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

About 118 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is County Road M over Conejos River?

The structure is 101 ft (30.9 m) long with a longest span of 99 ft (30.2 m) and a deck 20 ft wide.

Who owns County Road M over Conejos River?

It is owned by the County Highway Agency.