US Bridges

SH 133 Ml over Coal Creek

Fair

Pitkin County, Colorado · At Redstone · Structure no. H-08-H

Built
1961
64 years old
Condition
Fair
inspected January 2025
Type
Tee Beam
Concrete
Length
95 ft
3 main spans
Daily traffic
1,800
2020 count
Owner
State
State Highway Agency

About this bridge

SH 133 Ml over Coal Creek is a concrete tee beam carrying SH 133 Ml over Coal Creek in Pitkin County, Colorado. It was built in 1961, so it is 64 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 1,800 vehicles a day, roughly 3% of them trucks, projected to reach 1,872 by 2040. The structure is 95 ft (29 m) long and 32 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesSH 133 Ml
CrossesCoal Creek
LocationAt Redstone
RouteState Highway 133A
Coordinates39.18282, -107.23963
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79.7 US tons
Inventory rating47.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length95 ft (29 m)
Longest span30 ft (9.1 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,800 (2020)
Projected traffic1,872 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 SH 133 Ml over Coal Creek built?

It was built in 1961, making it 64 years old in 2025.

What condition is SH 133 Ml over Coal 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 January 2025.

How much traffic does SH 133 Ml over Coal Creek carry?

About 1,800 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is SH 133 Ml over Coal Creek?

The structure is 95 ft (29 m) long with a longest span of 30 ft (9.1 m) and a deck 32 ft wide.

Who owns SH 133 Ml over Coal Creek?

It is owned by the State Highway Agency.