US Bridges

3rd Avenue over Adonea Tributary

Fair

Arapahoe County, Colorado · East of N Newbern Way · Structure no. AUR07.5-X.6

Built
2005
20 years old
Condition
Fair
inspected November 2023
Type
Culvert
Concrete
Length
44 ft
3 main spans
Daily traffic
966
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

3rd Avenue over Adonea Tributary is a concrete culvert carrying 3rd Avenue over Adonea Tributary in Arapahoe County, Colorado. It was built in 2005, so it is 20 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 966 vehicles a day, roughly 1% of them trucks, projected to reach 1,179 by 2041. The structure is 44 ft (13.3 m) long and 73 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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Carries3rd Avenue
CrossesAdonea Tributary
LocationEast of N Newbern Way
RouteCity Street 0
CountyArapahoe County
StateColorado
Coordinates39.72191, -104.683
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 protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.1 US tons
Inventory rating45.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length44 ft (13.3 m)
Longest span14 ft (4.3 m)
Deck width73 ft (22.1 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic966 (2021)
Projected traffic1,179 by 2041
Trucks1%
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 3rd Avenue over Adonea Tributary built?

It was built in 2005, making it 20 years old in 2025.

What condition is 3rd Avenue over Adonea Tributary 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 2023.

How much traffic does 3rd Avenue over Adonea Tributary carry?

About 966 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is 3rd Avenue over Adonea Tributary?

The structure is 44 ft (13.3 m) long with a longest span of 14 ft (4.3 m) and a deck 73 ft wide.

Who owns 3rd Avenue over Adonea Tributary?

It is owned by the City or Municipal Highway Agency.