US Bridges

County Road 59 over N. Sterling Outlet Canal

PoorPosted for load

Logan County, Colorado · 0.3 MI N of CO RD 58 · Structure no. LOG59-58.1-163

Built
1940
85 years old
Condition
Poor
inspected December 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
43 ft
2 main spans
Daily traffic
6
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 59 over N. Sterling Outlet Canal is a wood or timber stringer/multi-beam or girder carrying County Road 59 over N. Sterling Outlet Canal in Logan County, Colorado. It was built in 1940, so it is 85 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. Its operating status is: posted for load restriction.

It carries about 6 vehicles a day, roughly 40% of them trucks, projected to reach 8 by 2042. The structure is 43 ft (13.2 m) long and 18 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesCounty Road 59
CrossesN. Sterling Outlet Canal
Location0.3 MI N of CO RD 58
RouteCounty Highway 0
CountyLogan County
StateColorado
Coordinates40.853, -103.01846
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating7.2 US tons
Inventory rating1.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadHS 20
Structure length43 ft (13.2 m)
Longest span20 ft (6.2 m)
Deck width18 ft (5.5 m)
Roadway width18 ft (5.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6 (2022)
Projected traffic8 by 2042
Trucks40%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$929,000 (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 59 over N. Sterling Outlet Canal built?

It was built in 1940, making it 85 years old in 2025.

What condition is County Road 59 over N. Sterling Outlet Canal 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 December 2024.

How much traffic does County Road 59 over N. Sterling Outlet Canal carry?

About 6 vehicles per day (2022 count), of which roughly 40% are trucks.

How long is County Road 59 over N. Sterling Outlet Canal?

The structure is 43 ft (13.2 m) long with a longest span of 20 ft (6.2 m) and a deck 18 ft wide.

Who owns County Road 59 over N. Sterling Outlet Canal?

It is owned by the County Highway Agency.