US Bridges

County Road 55 over Lewis Creek

Fair

Logan County, Colorado · 1.3 MI N of CO RD 52 · Structure no. LOG55-52.8-149A

Built
2004
21 years old
Condition
Fair
inspected December 2023
Type
Arch - Deck
Aluminum, Wrought Iron, or Cast Iron
Length
20 ft
1 main span
Daily traffic
29
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 55 over Lewis Creek is a aluminum, wrought iron, or cast iron arch - deck carrying County Road 55 over Lewis Creek in Logan County, Colorado. It was built in 2004, so it is 21 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 29 vehicles a day, roughly 32% of them trucks, projected to reach 35 by 2042. The structure is 20 ft (6.1 m) long and 40 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCounty Road 55
CrossesLewis Creek
Location1.3 MI N of CO RD 52
RouteCounty Highway 0
CountyLogan County
StateColorado
Coordinates40.8271, -103.05695
Functional classRural Minor 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
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 protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating106.8 US tons
Inventory rating106.8 US tons

Structure

Structure typeArch - Deck
MaterialAluminum, Wrought Iron, or Cast Iron
DeckNot applicable
Main spans1
Design loadHS 20
Structure length20 ft (6.1 m)
Longest span20 ft (6.1 m)
Deck width40 ft (12.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29 (2022)
Projected traffic35 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 55 over Lewis Creek built?

It was built in 2004, making it 21 years old in 2025.

What condition is County Road 55 over Lewis 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 55 over Lewis Creek carry?

About 29 vehicles per day (2022 count), of which roughly 32% are trucks.

How long is County Road 55 over Lewis Creek?

The structure is 20 ft (6.1 m) long with a longest span of 20 ft (6.1 m) and a deck 40 ft wide.

Who owns County Road 55 over Lewis Creek?

It is owned by the County Highway Agency.