US Bridges

Brooks Drive over Ralston Creek

Fair

Jefferson County, Colorado · NE Ralston RD and 59th · Structure no. ARVA-BS-0.20-01

Built
1957
68 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete
Length
32 ft
2 main spans
Daily traffic
2,128
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Brooks Drive over Ralston Creek is a concrete culvert carrying Brooks Drive over Ralston Creek in Jefferson County, Colorado. It was built in 1957, so it is 68 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 2,128 vehicles a day, roughly 2% of them trucks, projected to reach 2,447 by 2041. The structure is 32 ft (9.9 m) long and 48 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesBrooks Drive
CrossesRalston Creek
LocationNE Ralston RD and 59th
RouteCity Street 0
CountyJefferson County
StateColorado
Coordinates39.80556, -105.10575
Functional classUrban 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating64.5 US tons
Inventory rating38.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length32 ft (9.9 m)
Longest span16 ft (4.8 m)
Deck width48 ft (14.6 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,128 (2021)
Projected traffic2,447 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 Brooks Drive over Ralston Creek built?

It was built in 1957, making it 68 years old in 2025.

What condition is Brooks Drive over Ralston 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 April 2023.

How much traffic does Brooks Drive over Ralston Creek carry?

About 2,128 vehicles per day (2021 count), of which roughly 2% are trucks.

How long is Brooks Drive over Ralston Creek?

The structure is 32 ft (9.9 m) long with a longest span of 16 ft (4.8 m) and a deck 48 ft wide.

Who owns Brooks Drive over Ralston Creek?

It is owned by the City or Municipal Highway Agency.