US Bridges

County Road 33 over South Platte River

Fair

Morgan County, Colorado · 1.0 MI N of CO RD X · Structure no. MG33-1.0-X.5-A

Built
1987
38 years old, rebuilt 2018
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
654 ft
10 main spans
Daily traffic
144
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 33 over South Platte River is a steel stringer/multi-beam or girder carrying County Road 33 over South Platte River in Morgan County, Colorado. It was built in 1987 and reconstructed in 2018, so it is 38 years old, younger 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 144 vehicles a day, roughly 42% of them trucks, projected to reach 183 by 2043. The structure is 654 ft (199.3 m) long and 30 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesCounty Road 33
CrossesSouth Platte River
Location1.0 MI N of CO RD X
RouteCounty Highway 0
CountyMorgan County
StateColorado
Coordinates40.35597, -103.52789
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being 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 rating57.1 US tons
Inventory rating44 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans10
Design loadHL 93
Structure length654 ft (199.3 m)
Longest span64 ft (19.6 m)
Deck width30 ft (9.2 m)
Roadway width27 ft (8.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic144 (2023)
Projected traffic183 by 2043
Trucks42%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was County Road 33 over South Platte River built?

It was built in 1987, making it 38 years old in 2025. It was reconstructed in 2018.

What condition is County Road 33 over South Platte 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 November 2024.

How much traffic does County Road 33 over South Platte River carry?

About 144 vehicles per day (2023 count), of which roughly 42% are trucks.

How long is County Road 33 over South Platte River?

The structure is 654 ft (199.3 m) long with a longest span of 64 ft (19.6 m) and a deck 30 ft wide.

Who owns County Road 33 over South Platte River?

It is owned by the County Highway Agency.