US Bridges

SR-99 over Chalk Creek

Fair

Millard County, Utah · 300 North in Fillmore · Structure no. 0D 600

Built
1934
91 years old, rebuilt 1957
Condition
Fair
inspected February 2023
Type
Frame
Concrete
Length
50 ft
1 main span
Daily traffic
6,355
2021 count
Owner
State
State Highway Agency

About this bridge

SR-99 over Chalk Creek is a concrete frame carrying SR-99 over Chalk Creek in Millard County, Utah. It was built in 1934 and reconstructed in 1957, so it is 91 years old, older than the Utah average of 40.1 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 6,355 vehicles a day, roughly 24% of them trucks, projected to reach 7,626 by 2041. The structure is 50 ft (15.2 m) long and 70 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesSR-99
CrossesChalk Creek
Location300 North in Fillmore
RouteState Highway 99
CountyMillard County
StateUtah
Coordinates38.97518, -112.32368
Functional classRural Major 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
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 geometry9: Superior to present desirable criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.3 US tons
Inventory rating23.9 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length50 ft (15.2 m)
Longest span45 ft (13.7 m)
Deck width70 ft (21.4 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,355 (2021)
Projected traffic7,626 by 2041
Trucks24%
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

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR-99 over Chalk Creek built?

It was built in 1934, making it 91 years old in 2025. It was reconstructed in 1957.

What condition is SR-99 over Chalk Creek 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 February 2023.

How much traffic does SR-99 over Chalk Creek carry?

About 6,355 vehicles per day (2021 count), of which roughly 24% are trucks.

How long is SR-99 over Chalk Creek?

The structure is 50 ft (15.2 m) long with a longest span of 45 ft (13.7 m) and a deck 70 ft wide.

Who owns SR-99 over Chalk Creek?

It is owned by the State Highway Agency.