US Bridges

Railroad Drive over Union Ditch

Fair

Weld County, Colorado · 500 Ft S of W Taylor Ave · Structure no. LASALLE-002

Built
1930
95 years old
Condition
Fair
inspected March 2024
Type
Slab
Concrete Continuous
Length
30 ft
2 main spans
Daily traffic
202
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Railroad Drive over Union Ditch is a concrete continuous slab carrying Railroad Drive over Union Ditch in Weld County, Colorado. It was built in 1930, 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 5 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 202 vehicles a day, roughly 27% of them trucks, projected to reach 287 by 2042. The structure is 30 ft (9.1 m) long and 22 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesRailroad Drive
CrossesUnion Ditch
Location500 Ft S of W Taylor Ave
RouteCity Street 0
CountyWeld County
StateColorado
Coordinates40.34441, -104.70606
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span13 ft (4 m)
Deck width22 ft (6.8 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic202 (2023)
Projected traffic287 by 2042
Trucks27%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 Railroad Drive over Union Ditch built?

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

What condition is Railroad Drive over Union 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 2024.

How much traffic does Railroad Drive over Union Ditch carry?

About 202 vehicles per day (2023 count), of which roughly 27% are trucks.

How long is Railroad Drive over Union Ditch?

The structure is 30 ft (9.1 m) long with a longest span of 13 ft (4 m) and a deck 22 ft wide.

Who owns Railroad Drive over Union Ditch?

It is owned by the City or Municipal Highway Agency.