US Bridges

Namaqua Avenue over Big Barnes Ditch

Good

Larimer County, Colorado · 600 Ft S of US HWY 34 · Structure no. LOV1200NAMAV

Built
1992
33 years old
Condition
Good
inspected March 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
34 ft
1 main span
Daily traffic
4,626
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Namaqua Avenue over Big Barnes Ditch is a prestressed concrete box beam or girders - multiple carrying Namaqua Avenue over Big Barnes Ditch in Larimer County, Colorado. It was built in 1992, so it is 33 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,626 vehicles a day, roughly 13% of them trucks, projected to reach 5,782 by 2043. The structure is 34 ft (10.5 m) long and 55 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesNamaqua Avenue
CrossesBig Barnes Ditch
Location600 Ft S of US HWY 34
RouteCity Street 0
Coordinates40.40572, -105.12156
Functional classUrban Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.1 US tons
Inventory rating36.2 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length34 ft (10.5 m)
Longest span32 ft (9.7 m)
Deck width55 ft (16.7 m)
Roadway width45 ft (13.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,626 (2023)
Projected traffic5,782 by 2043
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Namaqua Avenue over Big Barnes Ditch built?

It was built in 1992, making it 33 years old in 2025.

What condition is Namaqua Avenue over Big Barnes Ditch 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 March 2023.

How much traffic does Namaqua Avenue over Big Barnes Ditch carry?

About 4,626 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is Namaqua Avenue over Big Barnes Ditch?

The structure is 34 ft (10.5 m) long with a longest span of 32 ft (9.7 m) and a deck 55 ft wide.

Who owns Namaqua Avenue over Big Barnes Ditch?

It is owned by the City or Municipal Highway Agency.