US Bridges

County Road 105 over South Arkansas River

Fair

Chaffee County, Colorado · 1.5 MI SE of Salida · Structure no. CHA105-00.50

Built
1945
80 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Concrete
Length
30 ft
1 main span
Daily traffic
277
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

County Road 105 over South Arkansas River is a concrete tee beam carrying County Road 105 over South Arkansas River in Chaffee County, Colorado. It was built in 1945, so it is 80 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 277 vehicles a day, roughly 2% of them trucks, projected to reach 338 by 2042. The structure is 30 ft (9.1 m) long and 22 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesCounty Road 105
CrossesSouth Arkansas River
Location1.5 MI SE of Salida
RouteCity Street 0
CountyChaffee County
StateColorado
Coordinates38.52099, -105.97788
Functional classUrban 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating40 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length30 ft (9.1 m)
Longest span28 ft (8.5 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic277 (2022)
Projected traffic338 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$119,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 105 over South Arkansas River built?

It was built in 1945, making it 80 years old in 2025.

What condition is County Road 105 over South Arkansas 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 March 2024.

How much traffic does County Road 105 over South Arkansas River carry?

About 277 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is County Road 105 over South Arkansas River?

The structure is 30 ft (9.1 m) long with a longest span of 28 ft (8.5 m) and a deck 22 ft wide.

Who owns County Road 105 over South Arkansas River?

It is owned by the City or Municipal Highway Agency.