US Bridges

County Road 21 over N Fork Frenchman Creek

Fair

Phillips County, Colorado · 0.2 Mi. No. of Co. Rd. 26 · Structure no. PH21-0.2-26-A

Built
1992
33 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
142 ft
2 main spans
Daily traffic
82
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 21 over N Fork Frenchman Creek is a steel continuous stringer/multi-beam or girder carrying County Road 21 over N Fork Frenchman Creek in Phillips County, Colorado. It was built in 1992, so it is 33 years old, younger 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.

It carries about 82 vehicles a day, roughly 32% of them trucks, projected to reach 97 by 2042. The structure is 142 ft (43.3 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCounty Road 21
CrossesN Fork Frenchman Creek
Location0.2 Mi. No. of Co. Rd. 26
RouteCounty Highway 0
CountyPhillips County
StateColorado
Coordinates40.61658, -102.47528
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.4 US tons
Inventory rating30.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckCorrugated steel
Main spans2
Design loadHS 20
Structure length142 ft (43.3 m)
Longest span68 ft (20.7 m)
Deck width32 ft (9.8 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic82 (2023)
Projected traffic97 by 2042
Trucks32%
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 21 over N Fork Frenchman Creek built?

It was built in 1992, making it 33 years old in 2025.

What condition is County Road 21 over N Fork 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 November 2023.

How much traffic does County Road 21 over N Fork Frenchman Creek carry?

About 82 vehicles per day (2023 count), of which roughly 32% are trucks.

How long is County Road 21 over N Fork Frenchman Creek?

The structure is 142 ft (43.3 m) long with a longest span of 68 ft (20.7 m) and a deck 32 ft wide.

Who owns County Road 21 over N Fork Frenchman Creek?

It is owned by the County Highway Agency.