US Bridges

West 1st Street over Transfer Ditch

Fair

Larimer County, Colorado · 20 Ft E of Lu Ann Drive · Structure no. LOV2495W.1ST ST

Built
1930
95 years old, rebuilt 1997
Condition
Fair
inspected March 2023
Type
Culvert
Concrete
Length
27 ft
3 main spans
Daily traffic
6,800
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

West 1st Street over Transfer Ditch is a concrete culvert carrying West 1st Street over Transfer Ditch in Larimer County, Colorado. It was built in 1930 and reconstructed in 1997, so it is 95 years old, older 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 6,800 vehicles a day, roughly 16% of them trucks, projected to reach 8,500 by 2043. The structure is 27 ft (8.1 m) long and 103 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesWest 1st Street
CrossesTransfer Ditch
Location20 Ft E of Lu Ann Drive
RouteCity Street 0
CountyLarimer County
StateColorado
Coordinates40.39264, -105.11125
Functional classRural Major Collector

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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 rating40 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length27 ft (8.1 m)
Longest span8 ft (2.5 m)
Deck width103 ft (31.3 m)
Roadway width85 ft (26 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,800 (2023)
Projected traffic8,500 by 2043
Trucks16%
Lanes on structure3
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 West 1st Street over Transfer Ditch built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1997.

What condition is West 1st Street over Transfer Ditch 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 March 2023.

How much traffic does West 1st Street over Transfer Ditch carry?

About 6,800 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is West 1st Street over Transfer Ditch?

The structure is 27 ft (8.1 m) long with a longest span of 8 ft (2.5 m) and a deck 103 ft wide.

Who owns West 1st Street over Transfer Ditch?

It is owned by the City or Municipal Highway Agency.