US Bridges

SH 120 Ml over Cockelburr Creek

Fair

Fremont County, Colorado · 0.1 MI E of JCT SH 115 · Structure no. K-16-T

Built
1930
95 years old
Condition
Fair
inspected August 2024
Type
Slab
Concrete
Length
62 ft
3 main spans
Daily traffic
800
2020 count
Owner
State
State Highway Agency

About this bridge

SH 120 Ml over Cockelburr Creek is a concrete slab carrying SH 120 Ml over Cockelburr Creek in Fremont County, Colorado. It was built in 1930, so it is 95 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.

It carries about 800 vehicles a day, roughly 11% of them trucks, projected to reach 984 by 2040. The structure is 62 ft (18.9 m) long and 28 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesSH 120 Ml
CrossesCockelburr Creek
Location0.1 MI E of JCT SH 115
RouteState Highway 120A
Coordinates38.38619, -105.07371
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.1 US tons
Inventory rating23.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length62 ft (18.9 m)
Longest span19 ft (5.8 m)
Deck width28 ft (8.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic800 (2020)
Projected traffic984 by 2040
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 120 Ml over Cockelburr Creek built?

It was built in 1930, making it 95 years old in 2025.

What condition is SH 120 Ml over Cockelburr 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 August 2024.

How much traffic does SH 120 Ml over Cockelburr Creek carry?

About 800 vehicles per day (2020 count), of which roughly 11% are trucks.

How long is SH 120 Ml over Cockelburr Creek?

The structure is 62 ft (18.9 m) long with a longest span of 19 ft (5.8 m) and a deck 28 ft wide.

Who owns SH 120 Ml over Cockelburr Creek?

It is owned by the State Highway Agency.