US Bridges

8th Avenue over BNSF RR | Navajo ST | Os

Fair

Denver County, Colorado · Mariposa to Vallejo · Structure no. D-03-V-150A

Built
1985
40 years old
Condition
Fair
inspected November 2024
Type
Box Beam or Girders - Single or Spread
Steel Continuous
Length
2,370 ft
19 main spans
Daily traffic
6,057
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

8th Avenue over BNSF RR | Navajo ST | Os is a steel continuous box beam or girders - single or spread carrying 8th Avenue over BNSF RR | Navajo ST | Os in Denver County, Colorado. It was built in 1985, so it is 40 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 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 6,057 vehicles a day, roughly 6% of them trucks, projected to reach 6,723 by 2041. The structure is 2,370 ft (722.4 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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Carries8th Avenue
CrossesBNSF RR | Navajo ST | Os
LocationMariposa to Vallejo
RouteCity Street 0
CountyDenver County
StateColorado
Coordinates39.72934, -105.01079
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating22.5 US tons
Inventory rating17.2 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans19
Design loadUnknown
Structure length2,370 ft (722.4 m)
Longest span136 ft (41.5 m)
Deck width40 ft (12.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,057 (2021)
Projected traffic6,723 by 2041
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and railroad
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 8th Avenue over BNSF RR | Navajo ST | Os built?

It was built in 1985, making it 40 years old in 2025.

What condition is 8th Avenue over BNSF RR | Navajo ST | Os 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 November 2024.

How much traffic does 8th Avenue over BNSF RR | Navajo ST | Os carry?

About 6,057 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is 8th Avenue over BNSF RR | Navajo ST | Os?

The structure is 2,370 ft (722.4 m) long with a longest span of 136 ft (41.5 m) and a deck 40 ft wide.

Who owns 8th Avenue over BNSF RR | Navajo ST | Os?

It is owned by the City or Municipal Highway Agency.