US Bridges

County Road 18 over Home Supply Ditch

Fair

Larimer County, Colorado · 0.6 MI E of CO RD 23E · Structure no. LR18-0.6-23E-A

Built
1993
32 years old
Condition
Fair
inspected March 2023
Type
Frame
Concrete
Length
26 ft
1 main span
Daily traffic
1,738
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 18 over Home Supply Ditch is a concrete frame carrying County Road 18 over Home Supply Ditch in Larimer County, Colorado. It was built in 1993, so it is 32 years old, younger 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 1,738 vehicles a day, roughly 21% of them trucks, projected to reach 2,173 by 2043. The structure is 26 ft (7.8 m) long and 68 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCounty Road 18
CrossesHome Supply Ditch
Location0.6 MI E of CO RD 23E
RouteCounty Highway 0
CountyLarimer County
StateColorado
Coordinates40.37858, -105.15308
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation6: Equal to 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 alignment8: Equal to present desirable criteria
Operating rating66.5 US tons
Inventory rating39.8 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckOther
Main spans1
Design loadHS 20
Structure length26 ft (7.8 m)
Longest span24 ft (7.2 m)
Deck width68 ft (20.8 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,738 (2023)
Projected traffic2,173 by 2043
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 18 over Home Supply Ditch built?

It was built in 1993, making it 32 years old in 2025.

What condition is County Road 18 over Home Supply 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 18 over Home Supply Ditch carry?

About 1,738 vehicles per day (2023 count), of which roughly 21% are trucks.

How long is County Road 18 over Home Supply Ditch?

The structure is 26 ft (7.8 m) long with a longest span of 24 ft (7.2 m) and a deck 68 ft wide.

Who owns County Road 18 over Home Supply Ditch?

It is owned by the County Highway Agency.