US Bridges

County Road 25 over Louden Ditch

Fair

Larimer County, Colorado · 0.2 MI N of CO RD 24 · Structure no. LR25-0.2-24

Built
1962
63 years old
Condition
Fair
inspected March 2023
Type
Culvert
Concrete
Length
22 ft
1 main span
Daily traffic
1,824
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 25 over Louden Ditch is a concrete culvert carrying County Road 25 over Louden Ditch in Larimer County, Colorado. It was built in 1962, so it is 63 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 1,824 vehicles a day, roughly 18% of them trucks, projected to reach 2,279 by 2043. The structure is 22 ft (6.8 m) long and 47 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesCounty Road 25
CrossesLouden Ditch
Location0.2 MI N of CO RD 24
RouteCounty Highway 0
CountyLarimer County
StateColorado
Coordinates40.425, -105.17397
Functional classRural 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
Channel and channel protection8 Very GoodNo problems noted.
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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating52.9 US tons
Inventory rating31.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length22 ft (6.8 m)
Longest span22 ft (6.8 m)
Deck width47 ft (14.3 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,824 (2023)
Projected traffic2,279 by 2043
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was County Road 25 over Louden Ditch built?

It was built in 1962, making it 63 years old in 2025.

What condition is County Road 25 over Louden 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 County Road 25 over Louden Ditch carry?

About 1,824 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is County Road 25 over Louden Ditch?

The structure is 22 ft (6.8 m) long with a longest span of 22 ft (6.8 m) and a deck 47 ft wide.

Who owns County Road 25 over Louden Ditch?

It is owned by the County Highway Agency.