US Bridges

County Road 45.5 over Latham Ditch

Fair

Weld County, Colorado · 0.2 MI N of CO RD 54.5 · Structure no. WEL045.5-054.5A

Built
1970
55 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
35 ft
1 main span
Daily traffic
14
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 45.5 over Latham Ditch is a steel stringer/multi-beam or girder carrying County Road 45.5 over Latham Ditch in Weld County, Colorado. It was built in 1970, so it is 55 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 14 vehicles a day, roughly 5% of them trucks, projected to reach 20 by 2042. The structure is 35 ft (10.6 m) long and 32 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesCounty Road 45.5
CrossesLatham Ditch
Location0.2 MI N of CO RD 54.5
RouteCounty Highway 0
CountyWeld County
StateColorado
Coordinates40.3885, -104.63052
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
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.8 US tons
Inventory rating22 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length35 ft (10.6 m)
Longest span32 ft (9.9 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14 (2023)
Projected traffic20 by 2042
Trucks5%
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

OwnerCounty Highway Agency
Maintained byCounty 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 County Road 45.5 over Latham Ditch built?

It was built in 1970, making it 55 years old in 2025.

What condition is County Road 45.5 over Latham 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 April 2024.

How much traffic does County Road 45.5 over Latham Ditch carry?

About 14 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is County Road 45.5 over Latham Ditch?

The structure is 35 ft (10.6 m) long with a longest span of 32 ft (9.9 m) and a deck 32 ft wide.

Who owns County Road 45.5 over Latham Ditch?

It is owned by the County Highway Agency.