US Bridges

County Road 13 over Trib N.Fk Lone Rock Crk

Good

Baca County, Colorado · .5 MI S of CR Bb · Structure no. BA13-13-235-21A

Built
1997
28 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
108 ft
1 main span
Daily traffic
52
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 13 over Trib N.Fk Lone Rock Crk is a prestressed concrete stringer/multi-beam or girder carrying County Road 13 over Trib N.Fk Lone Rock Crk in Baca County, Colorado. It was built in 1997, so it is 28 years old, younger than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 52 vehicles a day, projected to reach 66 by 2042. The structure is 108 ft (32.9 m) long and 32 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCounty Road 13
CrossesTrib N.Fk Lone Rock Crk
Location.5 MI S of CR Bb
RouteCounty Highway 0
CountyBaca County
StateColorado
Coordinates37.34526, -102.85083
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating95.6 US tons
Inventory rating43.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length108 ft (32.9 m)
Longest span103 ft (31.4 m)
Deck width32 ft (9.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic52 (2022)
Projected traffic66 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 13 over Trib N.Fk Lone Rock Crk built?

It was built in 1997, making it 28 years old in 2025.

What condition is County Road 13 over Trib N.Fk Lone Rock Crk in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2024.

How much traffic does County Road 13 over Trib N.Fk Lone Rock Crk carry?

About 52 vehicles per day (2022 count).

How long is County Road 13 over Trib N.Fk Lone Rock Crk?

The structure is 108 ft (32.9 m) long with a longest span of 103 ft (31.4 m) and a deck 32 ft wide.

Who owns County Road 13 over Trib N.Fk Lone Rock Crk?

It is owned by the County Highway Agency.