US Bridges

County Road 9 over South Platte River

Fair

Morgan County, Colorado · 1.3 MI N of CO RD W · Structure no. MG9-1.3-W-A

Built
2003
22 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
543 ft
9 main spans
Daily traffic
159
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 9 over South Platte River is a steel stringer/multi-beam or girder carrying County Road 9 over South Platte River in Morgan County, Colorado. It was built in 2003, so it is 22 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 6 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 159 vehicles a day, roughly 42% of them trucks, projected to reach 202 by 2043. The structure is 543 ft (165.4 m) long and 28 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesCounty Road 9
CrossesSouth Platte River
Location1.3 MI N of CO RD W
RouteCounty Highway 0
Coordinates40.335, -103.97022
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating36 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans9
Design loadUnknown
Structure length543 ft (165.4 m)
Longest span59 ft (17.9 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic159 (2023)
Projected traffic202 by 2043
Trucks42%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 9 over South Platte River built?

It was built in 2003, making it 22 years old in 2025.

What condition is County Road 9 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 December 2024.

How much traffic does County Road 9 over South Platte River carry?

About 159 vehicles per day (2023 count), of which roughly 42% are trucks.

How long is County Road 9 over South Platte River?

The structure is 543 ft (165.4 m) long with a longest span of 59 ft (17.9 m) and a deck 28 ft wide.

Who owns County Road 9 over South Platte River?

It is owned by the County Highway Agency.