US Bridges

County Road 20R over Dolores River

FairPosted for load

San Miguel County, Colorado · 14.1 MI NW of SH 141 · Structure no. SMG20R-14.5-15

Built
1960
65 years old
Condition
Fair
inspected June 2024
Type
Truss - Thru
Steel
Length
75 ft
1 main span
Daily traffic
2
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 20R over Dolores River is a steel truss - thru carrying County Road 20R over Dolores River in San Miguel 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 fair condition with a lowest component rating of 5 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 2 vehicles a day, projected to reach 2 by 2042. The structure is 75 ft (22.9 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 20R
CrossesDolores River
Location14.1 MI NW of SH 141
RouteCounty Highway 0
CountySan Miguel County
StateColorado
Coordinates38.15353, -108.88125
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
Deck8 Very GoodNo problems noted.
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 inspectionJune 2024
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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating11.6 US tons
Inventory rating6.9 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length75 ft (22.9 m)
Longest span70 ft (21.3 m)
Deck width15 ft (4.6 m)
Roadway width15 ft (4.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2 (2022)
Projected traffic2 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$1.5 million (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 20R over Dolores River built?

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

What condition is County Road 20R over Dolores 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 June 2024.

How much traffic does County Road 20R over Dolores River carry?

About 2 vehicles per day (2022 count).

How long is County Road 20R over Dolores River?

The structure is 75 ft (22.9 m) long with a longest span of 70 ft (21.3 m) and a deck 15 ft wide.

Who owns County Road 20R over Dolores River?

It is owned by the County Highway Agency.