US Bridges

Rossum Drive over Big Barnes Ditch

Good

Larimer County, Colorado · 0.1 MI South of US 34 · Structure no. LOV1100ROSSUMDR

Built
2002
23 years old
Condition
Good
inspected March 2023
Type
Tee Beam
Prestressed Concrete
Length
52 ft
1 main span
Daily traffic
1,371
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Rossum Drive over Big Barnes Ditch is a prestressed concrete tee beam carrying Rossum Drive over Big Barnes Ditch in Larimer County, Colorado. It was built in 2002, so it is 23 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 1,371 vehicles a day, roughly 17% of them trucks, projected to reach 1,714 by 2043. The structure is 52 ft (15.8 m) long and 44 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesRossum Drive
CrossesBig Barnes Ditch
Location0.1 MI South of US 34
RouteCity Street 0
CountyLarimer County
StateColorado
Coordinates40.40533, -105.14114
Functional classUrban Local

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 protection7 GoodSome minor problems.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating68.6 US tons
Inventory rating37.1 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length52 ft (15.8 m)
Longest span48 ft (14.6 m)
Deck width44 ft (13.3 m)
Roadway width34 ft (10.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,371 (2023)
Projected traffic1,714 by 2043
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed5 mi (8 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 Rossum Drive over Big Barnes Ditch built?

It was built in 2002, making it 23 years old in 2025.

What condition is Rossum Drive 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 Rossum Drive over Big Barnes Ditch carry?

About 1,371 vehicles per day (2023 count), of which roughly 17% are trucks.

How long is Rossum Drive over Big Barnes Ditch?

The structure is 52 ft (15.8 m) long with a longest span of 48 ft (14.6 m) and a deck 44 ft wide.

Who owns Rossum Drive over Big Barnes Ditch?

It is owned by the City or Municipal Highway Agency.