US Bridges

County Road 18 over Unnamed Creek

Poor

Baca County, Colorado · 2.5 MI S of CR G · Structure no. BA18-18-2.3-55

Built
1960
65 years old
Condition
Poor
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
24 ft
1 main span
Daily traffic
12
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 18 over Unnamed Creek is a steel stringer/multi-beam or girder carrying County Road 18 over Unnamed Creek in Baca County, Colorado. It was built in 1960, so it is 65 years old, older than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 12 vehicles a day, projected to reach 15 by 2042. The structure is 24 ft (7.4 m) long and 24 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCounty Road 18
CrossesUnnamed Creek
Location2.5 MI S of CR G
RouteCounty Highway 0
CountyBaca County
StateColorado
Coordinates37.03991, -102.75389
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, 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 inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating17.9 US tons
Inventory rating10.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length24 ft (7.4 m)
Longest span21 ft (6.4 m)
Deck width24 ft (7.4 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12 (2022)
Projected traffic15 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 18 over Unnamed Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is County Road 18 over Unnamed Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2024.

How much traffic does County Road 18 over Unnamed Creek carry?

About 12 vehicles per day (2022 count).

How long is County Road 18 over Unnamed Creek?

The structure is 24 ft (7.4 m) long with a longest span of 21 ft (6.4 m) and a deck 24 ft wide.

Who owns County Road 18 over Unnamed Creek?

It is owned by the County Highway Agency.