US Bridges

County Road 58 over I 25 Ml and Frontage RD

Fair

Larimer County, Colorado · 2.5 MI S of SH 1 · Structure no. B-16-FM

Built
1966
59 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
269 ft
3 main spans
Daily traffic
2,144
2023 count
Owner
State
State Highway Agency

About this bridge

County Road 58 over I 25 Ml and Frontage RD is a steel stringer/multi-beam or girder carrying County Road 58 over I 25 Ml and Frontage RD in Larimer County, Colorado. It was built in 1966, so it is 59 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.

It carries about 2,144 vehicles a day, projected to reach 2,680 by 2042. The structure is 269 ft (82 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesCounty Road 58
CrossesI 25 Ml and Frontage RD
Location2.5 MI S of SH 1
RouteCounty Highway 0
CountyLarimer County
StateColorado
Coordinates40.66789, -105.00138
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.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56 US tons
Inventory rating34.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3 (+1 approach)
Design loadH 20
Structure length269 ft (82 m)
Longest span74 ft (22.7 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,144 (2023)
Projected traffic2,680 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 58 over I 25 Ml and Frontage RD built?

It was built in 1966, making it 59 years old in 2025.

What condition is County Road 58 over I 25 Ml and Frontage RD 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 May 2023.

How much traffic does County Road 58 over I 25 Ml and Frontage RD carry?

About 2,144 vehicles per day (2023 count).

How long is County Road 58 over I 25 Ml and Frontage RD?

The structure is 269 ft (82 m) long with a longest span of 74 ft (22.7 m) and a deck 28 ft wide.

Who owns County Road 58 over I 25 Ml and Frontage RD?

It is owned by the State Highway Agency.