US Bridges

I-25 Service Road over Rock Creek

Poor

Platte County, Wyoming · Wheatland South · Structure no. ADQ

Built
1948
77 years old
Condition
Poor
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
82 ft
3 main spans
Daily traffic
153
2024 count
Owner
State
State Highway Agency

About this bridge

I-25 Service Road over Rock Creek is a steel continuous stringer/multi-beam or girder carrying I-25 Service Road over Rock Creek in Platte County, Wyoming. It was built in 1948, so it is 77 years old, older than the Wyoming average of 48.4 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.

It carries about 153 vehicles a day, roughly 7% of them trucks, projected to reach 214 by 2043. The structure is 82 ft (25 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-25 Service Road
CrossesRock Creek
LocationWheatland South
CountyPlatte County
StateWyoming
Coordinates42.0135, -104.96134
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
Deck7 GoodSome minor problems.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65 US tons
Inventory rating38 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length82 ft (25 m)
Longest span30 ft (9.1 m)
Deck width44 ft (13.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic153 (2024)
Projected traffic214 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-25 Service Road over Rock Creek built?

It was built in 1948, making it 77 years old in 2025.

What condition is I-25 Service Road over Rock Creek 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 January 2025.

How much traffic does I-25 Service Road over Rock Creek carry?

About 153 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is I-25 Service Road over Rock Creek?

The structure is 82 ft (25 m) long with a longest span of 30 ft (9.1 m) and a deck 44 ft wide.

Who owns I-25 Service Road over Rock Creek?

It is owned by the State Highway Agency.