US Bridges

County Road 31 over Pawnee Creek

FairPosted for load

Logan County, Colorado · 0.1 Mi. N. of CO RD 18.2 · Structure no. LOG31-18.3-61

Built
1950
75 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
67 ft
3 main spans
Daily traffic
41
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 31 over Pawnee Creek is a wood or timber stringer/multi-beam or girder carrying County Road 31 over Pawnee Creek in Logan County, Colorado. It was built in 1950, so it is 75 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. Its operating status is: posted for load restriction.

It carries about 41 vehicles a day, roughly 29% of them trucks, projected to reach 51 by 2042. The structure is 67 ft (20.4 m) long and 20 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesCounty Road 31
CrossesPawnee Creek
Location0.1 Mi. N. of CO RD 18.2
RouteCounty Highway 0
CountyLogan County
StateColorado
Coordinates40.55717, -103.29533
Functional classRural 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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating26.3 US tons
Inventory rating18.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadUnknown
Structure length67 ft (20.4 m)
Longest span22 ft (6.6 m)
Deck width20 ft (6.1 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic41 (2023)
Projected traffic51 by 2042
Trucks29%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 31 over Pawnee Creek built?

It was built in 1950, making it 75 years old in 2025.

What condition is County Road 31 over Pawnee 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 January 2024.

How much traffic does County Road 31 over Pawnee Creek carry?

About 41 vehicles per day (2023 count), of which roughly 29% are trucks.

How long is County Road 31 over Pawnee Creek?

The structure is 67 ft (20.4 m) long with a longest span of 22 ft (6.6 m) and a deck 20 ft wide.

Who owns County Road 31 over Pawnee Creek?

It is owned by the County Highway Agency.