US Bridges

County Road 105 over Unnamed Creek

Fair

Chaffee County, Colorado · 1.9 MI SE of Salida · Structure no. CHA105-00.20

Built
1945
80 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Concrete
Length
23 ft
1 main span
Daily traffic
9
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 105 over Unnamed Creek is a concrete tee beam carrying County Road 105 over Unnamed Creek 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 6 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 9 vehicles a day, roughly 2% of them trucks, projected to reach 11 by 2042. The structure is 23 ft (7 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
CrossesUnnamed Creek
Location1.9 MI SE of Salida
RouteCounty Highway 0
CountyChaffee County
StateColorado
Coordinates38.51429, -105.97588
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length23 ft (7 m)
Longest span20 ft (6.1 m)
Deck width22 ft (6.6 m)
Roadway width19 ft (5.7 m)
Vertical clearance over deck18 ft (5.5 m)

Traffic and service

Average daily traffic9 (2022)
Projected traffic11 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

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$9,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 105 over Unnamed Creek built?

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

What condition is County Road 105 over Unnamed Creek 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 Unnamed Creek carry?

About 9 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is County Road 105 over Unnamed Creek?

The structure is 23 ft (7 m) long with a longest span of 20 ft (6.1 m) and a deck 22 ft wide.

Who owns County Road 105 over Unnamed Creek?

It is owned by the County Highway Agency.