US Bridges

Berthoud Dale Ln. over Big Thompson River

Fair

Larimer County, Colorado · 10 Ft S of US HWY 34 · Structure no. LRBRTHDDALELN1

Built
1977
48 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
42 ft
1 main span
Daily traffic
26
2023 count
Owner
County
County Highway Agency

About this bridge

Berthoud Dale Ln. over Big Thompson River is a steel continuous stringer/multi-beam or girder carrying Berthoud Dale Ln. over Big Thompson River in Larimer County, Colorado. It was built in 1977, so it is 48 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 26 vehicles a day, projected to reach 33 by 2042. The structure is 42 ft (12.7 m) long and 12 ft wide.

Location

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CarriesBerthoud Dale Ln.
CrossesBig Thompson River
Location10 Ft S of US HWY 34
RouteCounty Highway 0
CountyLarimer County
StateColorado
Coordinates40.38515, -105.46924
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
Deck8 Very GoodNo problems noted.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating62.6 US tons
Inventory rating45.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckOther
Main spans1
Design loadHL 93
Structure length42 ft (12.7 m)
Longest span35 ft (10.7 m)
Deck width12 ft (3.8 m)
Roadway width12 ft (3.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26 (2023)
Projected traffic33 by 2042
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byOther Local 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 Berthoud Dale Ln. over Big Thompson River built?

It was built in 1977, making it 48 years old in 2025.

What condition is Berthoud Dale Ln. over Big Thompson River 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 August 2023.

How much traffic does Berthoud Dale Ln. over Big Thompson River carry?

About 26 vehicles per day (2023 count).

How long is Berthoud Dale Ln. over Big Thompson River?

The structure is 42 ft (12.7 m) long with a longest span of 35 ft (10.7 m) and a deck 12 ft wide.

Who owns Berthoud Dale Ln. over Big Thompson River?

It is owned by the County Highway Agency and maintained by the Other Local Agency.