US Bridges

US 24 Ml over S Fk South Platte Rvr

Fair

Park County, Colorado · 0.5 MI SE of JCT SH 9 E-W · Structure no. H-13-Z

Built
1978
47 years old
Condition
Fair
inspected December 2023
Type
Culvert
Steel
Length
41 ft
3 main spans
Daily traffic
3,900
2020 count
Owner
State
State Highway Agency

About this bridge

US 24 Ml over S Fk South Platte Rvr is a steel culvert carrying US 24 Ml over S Fk South Platte Rvr in Park County, Colorado. It was built in 1978, so it is 47 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 3,900 vehicles a day, roughly 6% of them trucks, projected to reach 4,914 by 2040. The structure is 41 ft (12.5 m) long and 86 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesUS 24 Ml
CrossesS Fk South Platte Rvr
Location0.5 MI SE of JCT SH 9 E-W
RouteU.S. Route 24A
Coordinates39.02129, -105.80288
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: 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 rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHS 20
Structure length41 ft (12.5 m)
Longest span11 ft (3.5 m)
Deck width86 ft (26.2 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,900 (2020)
Projected traffic4,914 by 2040
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US 24 Ml over S Fk South Platte Rvr built?

It was built in 1978, making it 47 years old in 2025.

What condition is US 24 Ml over S Fk South Platte Rvr 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 2023.

How much traffic does US 24 Ml over S Fk South Platte Rvr carry?

About 3,900 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is US 24 Ml over S Fk South Platte Rvr?

The structure is 41 ft (12.5 m) long with a longest span of 11 ft (3.5 m) and a deck 86 ft wide.

Who owns US 24 Ml over S Fk South Platte Rvr?

It is owned by the State Highway Agency.