US Bridges

SH 157 Sbnd over Four Mile Canyon Creek

Good

Boulder County, Colorado · .25 MI S of SH119 Intsn · Structure no. D-16-DK

Built
1988
37 years old
Condition
Good
inspected July 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
132 ft
2 main spans
Daily traffic
20,500
2020 count
Owner
State
State Highway Agency

About this bridge

SH 157 Sbnd over Four Mile Canyon Creek is a prestressed concrete continuous box beam or girders - single or spread carrying SH 157 Sbnd over Four Mile Canyon Creek in Boulder County, Colorado. It was built in 1988, so it is 37 years old, younger than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 20,500 vehicles a day, roughly 3% of them trucks, projected to reach 22,550 by 2040. The structure is 132 ft (40.3 m) long and 49 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesSH 157 Sbnd
CrossesFour Mile Canyon Creek
Location.25 MI S of SH119 Intsn
RouteState Highway 157A
Coordinates40.04541, -105.24057
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
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 rating85.3 US tons
Inventory rating51.1 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length132 ft (40.3 m)
Longest span64 ft (19.6 m)
Deck width49 ft (14.8 m)
Roadway width46 ft (14 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,500 (2020)
Projected traffic22,550 by 2040
Trucks3%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

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 157 Sbnd over Four Mile Canyon Creek built?

It was built in 1988, making it 37 years old in 2025.

What condition is SH 157 Sbnd over Four Mile Canyon Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.

How much traffic does SH 157 Sbnd over Four Mile Canyon Creek carry?

About 20,500 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is SH 157 Sbnd over Four Mile Canyon Creek?

The structure is 132 ft (40.3 m) long with a longest span of 64 ft (19.6 m) and a deck 49 ft wide.

Who owns SH 157 Sbnd over Four Mile Canyon Creek?

It is owned by the State Highway Agency.