US Bridges

Cb Cnty RD 603 over Four Mile Creek

Poor

Carbon County, Wyoming · 3.5 MI South of Baggs · Structure no. FPX

Built
1991
34 years old
Condition
Poor
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
37 ft
1 main span
Daily traffic
44
2024 count
Owner
County
County Highway Agency

About this bridge

Cb Cnty RD 603 over Four Mile Creek is a steel stringer/multi-beam or girder carrying Cb Cnty RD 603 over Four Mile Creek in Carbon County, Wyoming. It was built in 1991, so it is 34 years old, younger than the Wyoming average of 48.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 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 44 vehicles a day, roughly 7% of them trucks, projected to reach 62 by 2043. The structure is 37 ft (11.3 m) long and 25 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesCb Cnty RD 603
CrossesFour Mile Creek
Location3.5 MI South of Baggs
RouteCounty Highway 603
StateWyoming
Coordinates41.00299, -107.69062
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
Deck3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
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 inspectionJune 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating55 US tons
Inventory rating38 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length37 ft (11.3 m)
Longest span35 ft (10.7 m)
Deck width25 ft (7.7 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic44 (2024)
Projected traffic62 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$253,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Cb Cnty RD 603 over Four Mile Creek built?

It was built in 1991, making it 34 years old in 2025.

What condition is Cb Cnty RD 603 over Four Mile 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 June 2024.

How much traffic does Cb Cnty RD 603 over Four Mile Creek carry?

About 44 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is Cb Cnty RD 603 over Four Mile Creek?

The structure is 37 ft (11.3 m) long with a longest span of 35 ft (10.7 m) and a deck 25 ft wide.

Who owns Cb Cnty RD 603 over Four Mile Creek?

It is owned by the County Highway Agency.