US Bridges

County Road Tt over Ft. Lyon Canal

Fair

Prowers County, Colorado · .2 MI W of CR 10.5 · Structure no. PRTT-9.1-39-32

Built
1950
75 years old, rebuilt 1996
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
30 ft
1 main span
Daily traffic
26
2022 count
Owner
County
County Highway Agency

About this bridge

County Road Tt over Ft. Lyon Canal is a steel stringer/multi-beam or girder carrying County Road Tt over Ft. Lyon Canal in Prowers County, Colorado. It was built in 1950 and reconstructed in 1996, so it is 75 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 31 by 2042. The structure is 30 ft (9.2 m) long and 21 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCounty Road Tt
CrossesFt. Lyon Canal
Location.2 MI W of CR 10.5
RouteCounty Highway 0
CountyProwers County
StateColorado
Coordinates38.21622, -102.57004
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 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 alignment6: Equal to present minimum criteria
Operating rating48.6 US tons
Inventory rating29.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length30 ft (9.2 m)
Longest span27 ft (8.3 m)
Deck width21 ft (6.5 m)
Roadway width21 ft (6.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26 (2022)
Projected traffic31 by 2042
Trucks0%
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 Tt over Ft. Lyon Canal built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1996.

What condition is County Road Tt over Ft. Lyon Canal 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 2023.

How much traffic does County Road Tt over Ft. Lyon Canal carry?

About 26 vehicles per day (2022 count).

How long is County Road Tt over Ft. Lyon Canal?

The structure is 30 ft (9.2 m) long with a longest span of 27 ft (8.3 m) and a deck 21 ft wide.

Who owns County Road Tt over Ft. Lyon Canal?

It is owned by the County Highway Agency.