US Bridges

County Road 44.6 over School House Gulch

Poor

Lincoln County, Colorado · 2.5 MI SE of Boyero · Structure no. LIN-44.6-2D.8

Built
1935
90 years old
Condition
Poor
inspected May 2023
Type
Tee Beam
Concrete
Length
29 ft
1 main span
Daily traffic
14
2020 count
Owner
County
County Highway Agency

About this bridge

County Road 44.6 over School House Gulch is a concrete tee beam carrying County Road 44.6 over School House Gulch in Lincoln County, Colorado. It was built in 1935, so it is 90 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 14 vehicles a day, projected to reach 18 by 2040. The structure is 29 ft (8.8 m) long and 22 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

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CarriesCounty Road 44.6
CrossesSchool House Gulch
Location2.5 MI SE of Boyero
RouteCounty Highway 0
CountyLincoln County
StateColorado
Coordinates38.9062, -103.24683
Functional classRural 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
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 rating40 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length29 ft (8.8 m)
Longest span25 ft (7.6 m)
Deck width22 ft (6.6 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14 (2020)
Projected traffic18 by 2040
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusEligible 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 44.6 over School House Gulch built?

It was built in 1935, making it 90 years old in 2025.

What condition is County Road 44.6 over School House Gulch 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 May 2023.

How much traffic does County Road 44.6 over School House Gulch carry?

About 14 vehicles per day (2020 count).

How long is County Road 44.6 over School House Gulch?

The structure is 29 ft (8.8 m) long with a longest span of 25 ft (7.6 m) and a deck 22 ft wide.

Who owns County Road 44.6 over School House Gulch?

It is owned by the County Highway Agency.