US Bridges

County Road 91 over Frenchman Creek

FairPosted for load

Logan County, Colorado · 0.2 MI N of CO RD 91 · Structure no. LOG91-16.2-233

Built
1940
85 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
101 ft
5 main spans
Daily traffic
23
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 91 over Frenchman Creek is a wood or timber stringer/multi-beam or girder carrying County Road 91 over Frenchman Creek in Logan County, Colorado. It was built in 1940, so it is 85 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 5 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 23 vehicles a day, roughly 25% of them trucks, projected to reach 28 by 2042. The structure is 101 ft (30.8 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCounty Road 91
CrossesFrenchman Creek
Location0.2 MI N of CO RD 91
RouteCounty Highway 0
CountyLogan County
StateColorado
Coordinates40.54307, -102.72226
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating23.5 US tons
Inventory rating16.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans5
Design loadUnknown
Structure length101 ft (30.8 m)
Longest span20 ft (6.1 m)
Deck width24 ft (7.4 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23 (2023)
Projected traffic28 by 2042
Trucks25%
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 91 over Frenchman Creek built?

It was built in 1940, making it 85 years old in 2025.

What condition is County Road 91 over Frenchman 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 December 2023.

How much traffic does County Road 91 over Frenchman Creek carry?

About 23 vehicles per day (2023 count), of which roughly 25% are trucks.

How long is County Road 91 over Frenchman Creek?

The structure is 101 ft (30.8 m) long with a longest span of 20 ft (6.1 m) and a deck 24 ft wide.

Who owns County Road 91 over Frenchman Creek?

It is owned by the County Highway Agency.