US Bridges

Broadway over Four Mile Creek/Bike Pth

Fair

Boulder County, Colorado · At Rosewood Avenue · Structure no. BOLD-BRDWAY-4MI

Built
1994
31 years old, rebuilt 2022
Condition
Fair
inspected January 2025
Type
Culvert
Concrete
Length
43 ft
2 main spans
Daily traffic
11,874
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Broadway over Four Mile Creek/Bike Pth is a concrete culvert carrying Broadway over Four Mile Creek/Bike Pth in Boulder County, Colorado. It was built in 1994 and reconstructed in 2022, so it is 31 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 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 11,874 vehicles a day, roughly 11% of them trucks, projected to reach 14,249 by 2043. The structure is 43 ft (13 m) long and 71 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesBroadway
CrossesFour Mile Creek/Bike Pth
LocationAt Rosewood Avenue
RouteCity Street 0
Coordinates40.05608, -105.28202
Functional classUrban Other Principal 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
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.7 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length43 ft (13 m)
Longest span20 ft (6.2 m)
Deck width71 ft (21.5 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,874 (2023)
Projected traffic14,249 by 2043
Trucks11%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Broadway over Four Mile Creek/Bike Pth built?

It was built in 1994, making it 31 years old in 2025. It was reconstructed in 2022.

What condition is Broadway over Four Mile Creek/Bike Pth 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 Broadway over Four Mile Creek/Bike Pth carry?

About 11,874 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is Broadway over Four Mile Creek/Bike Pth?

The structure is 43 ft (13 m) long with a longest span of 20 ft (6.2 m) and a deck 71 ft wide.

Who owns Broadway over Four Mile Creek/Bike Pth?

It is owned by the City or Municipal Highway Agency.