US Bridges

Rainbow Avenue over Hoffman Drainage

Good

Adams County, Colorado · 0.1 MI S of 88th Ave. · Structure no. ADA04.9-087

Built
2017
8 years old
Condition
Good
inspected January 2024
Type
Culvert
Concrete
Length
24 ft
3 main spans
Daily traffic
1,656
2021 count
Owner
County
County Highway Agency

About this bridge

Rainbow Avenue over Hoffman Drainage is a concrete culvert carrying Rainbow Avenue over Hoffman Drainage in Adams County, Colorado. It was built in 2017, so it is 8 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,656 vehicles a day, projected to reach 2,153 by 2041. The structure is 24 ft (7.2 m) long and 74 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesRainbow Avenue
CrossesHoffman Drainage
Location0.1 MI S of 88th Ave.
RouteCounty Highway 0
Coordinates39.85423, -104.95988
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.6 US tons
Inventory rating38.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHL 93
Structure length24 ft (7.2 m)
Longest span7 ft (2.1 m)
Deck width74 ft (22.6 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,656 (2021)
Projected traffic2,153 by 2041
Trucks0%
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

OwnerCounty Highway Agency
Maintained byCounty 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 Rainbow Avenue over Hoffman Drainage built?

It was built in 2017, making it 8 years old in 2025.

What condition is Rainbow Avenue over Hoffman Drainage 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 January 2024.

How much traffic does Rainbow Avenue over Hoffman Drainage carry?

About 1,656 vehicles per day (2021 count).

How long is Rainbow Avenue over Hoffman Drainage?

The structure is 24 ft (7.2 m) long with a longest span of 7 ft (2.1 m) and a deck 74 ft wide.

Who owns Rainbow Avenue over Hoffman Drainage?

It is owned by the County Highway Agency.