US Bridges

County Road E.5 over Rio San Antonio

Fair

Conejos County, Colorado · 0.9 MI S of Antonito · Structure no. CON00.8E-00.8SA

Built
1994
31 years old
Condition
Fair
inspected March 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
80 ft
1 main span
Daily traffic
54
2022 count
Owner
County
County Highway Agency

About this bridge

County Road E.5 over Rio San Antonio is a steel stringer/multi-beam or girder carrying County Road E.5 over Rio San Antonio in Conejos County, Colorado. It was built in 1994, so it is 31 years old, younger 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.

It carries about 54 vehicles a day, projected to reach 62 by 2042. The structure is 80 ft (24.4 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCounty Road E.5
CrossesRio San Antonio
Location0.9 MI S of Antonito
RouteCounty Highway 0
CountyConejos County
StateColorado
Coordinates37.06489, -106.00584
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.
Superstructure8 Very GoodNo problems noted.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating72.8 US tons
Inventory rating43.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length80 ft (24.4 m)
Longest span75 ft (22.9 m)
Deck width29 ft (8.7 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic54 (2022)
Projected traffic62 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 E.5 over Rio San Antonio built?

It was built in 1994, making it 31 years old in 2025.

What condition is County Road E.5 over Rio San Antonio 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 March 2025.

How much traffic does County Road E.5 over Rio San Antonio carry?

About 54 vehicles per day (2022 count).

How long is County Road E.5 over Rio San Antonio?

The structure is 80 ft (24.4 m) long with a longest span of 75 ft (22.9 m) and a deck 29 ft wide.

Who owns County Road E.5 over Rio San Antonio?

It is owned by the County Highway Agency.