US Bridges

County Road 40 over Fossil Creek Res. Inlet

Poor

Larimer County, Colorado · 0.2 MI E of CO RD 9 · Structure no. LR40-0.2-9

Built
1969
56 years old
Condition
Poor
inspected June 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
24 ft
1 main span
Daily traffic
1,627
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 40 over Fossil Creek Res. Inlet is a wood or timber stringer/multi-beam or girder carrying County Road 40 over Fossil Creek Res. Inlet in Larimer County, Colorado. It was built in 1969, so it is 56 years old, older than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,627 vehicles a day, roughly 13% of them trucks, projected to reach 2,034 by 2042. The structure is 24 ft (7.3 m) long and 25 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCounty Road 40
CrossesFossil Creek Res. Inlet
Location0.2 MI E of CO RD 9
RouteCounty Highway 0
CountyLarimer County
StateColorado
Coordinates40.53781, -105.01661
Functional classUrban Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.8 US tons
Inventory rating27.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span20 ft (6.2 m)
Deck width25 ft (7.6 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,627 (2023)
Projected traffic2,034 by 2042
Trucks13%
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 40 over Fossil Creek Res. Inlet built?

It was built in 1969, making it 56 years old in 2025.

What condition is County Road 40 over Fossil Creek Res. Inlet in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2023.

How much traffic does County Road 40 over Fossil Creek Res. Inlet carry?

About 1,627 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is County Road 40 over Fossil Creek Res. Inlet?

The structure is 24 ft (7.3 m) long with a longest span of 20 ft (6.2 m) and a deck 25 ft wide.

Who owns County Road 40 over Fossil Creek Res. Inlet?

It is owned by the County Highway Agency.