US Bridges

County RD 105.5 over Rito Agua Dulce

Fair

Las Animas County, Colorado · .5 MI NW of CR 105.6/8.8 · Structure no. LA105.5-53-5-91

Built
1935
90 years old
Condition
Fair
inspected June 2023
Type
Tee Beam
Concrete
Length
33 ft
1 main span
Daily traffic
12
2022 count
Owner
County
County Highway Agency

About this bridge

County RD 105.5 over Rito Agua Dulce is a concrete tee beam carrying County RD 105.5 over Rito Agua Dulce in Las Animas County, Colorado. It was built in 1935, so it is 90 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.

It carries about 12 vehicles a day, projected to reach 15 by 2042. The structure is 33 ft (10 m) long and 17 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

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CarriesCounty RD 105.5
CrossesRito Agua Dulce
Location.5 MI NW of CR 105.6/8.8
RouteCounty Highway 0
CountyLas Animas County
StateColorado
Coordinates37.06566, -104.18697
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry8: Equal to present desirable 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 rating40 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length33 ft (10 m)
Longest span30 ft (9.1 m)
Deck width17 ft (5.2 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12 (2022)
Projected traffic15 by 2042
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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 RD 105.5 over Rito Agua Dulce built?

It was built in 1935, making it 90 years old in 2025.

What condition is County RD 105.5 over Rito Agua Dulce 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 2023.

How much traffic does County RD 105.5 over Rito Agua Dulce carry?

About 12 vehicles per day (2022 count).

How long is County RD 105.5 over Rito Agua Dulce?

The structure is 33 ft (10 m) long with a longest span of 30 ft (9.1 m) and a deck 17 ft wide.

Who owns County RD 105.5 over Rito Agua Dulce?

It is owned by the County Highway Agency.