US Bridges

SR 99 over Clear Creek

Fair

Navajo County, Arizona · 4.4 MI E JCT SR 87 · Structure no. 01038

Built
1951
74 years old
Condition
Fair
inspected November 2024
Type
Arch - Deck
Steel
Length
167 ft
1 main span
Daily traffic
573
2021 count
Owner
State
State Highway Agency

About this bridge

SR 99 over Clear Creek is a steel arch - deck carrying SR 99 over Clear Creek in Navajo County, Arizona. It was built in 1951, so it is 74 years old, older than the Arizona average of 47.8 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 573 vehicles a day, roughly 7% of them trucks, projected to reach 583 by 2041. The structure is 167 ft (50.9 m) long and 28 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesSR 99
CrossesClear Creek
Location4.4 MI E JCT SR 87
RouteState Highway 99
CountyNavajo County
StateArizona
Coordinates34.9679, -110.6467
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 protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating68 US tons
Inventory rating50 US tons

Structure

Structure typeArch - Deck
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20
Structure length167 ft (50.9 m)
Longest span130 ft (39.6 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic573 (2021)
Projected traffic583 by 2041
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 99 over Clear Creek built?

It was built in 1951, making it 74 years old in 2025.

What condition is SR 99 over Clear 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 November 2024.

How much traffic does SR 99 over Clear Creek carry?

About 573 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is SR 99 over Clear Creek?

The structure is 167 ft (50.9 m) long with a longest span of 130 ft (39.6 m) and a deck 28 ft wide.

Who owns SR 99 over Clear Creek?

It is owned by the State Highway Agency.