US Bridges

FH-3 Lake Mary RD over Sheep Tank Wash

Good

Coconino County, Arizona · 9.4 MI N JCT SR 87 · Structure no. 09266

Built
1968
57 years old
Condition
Good
inspected July 2022
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
720
2022 count
Owner
County
County Highway Agency

About this bridge

FH-3 Lake Mary RD over Sheep Tank Wash is a concrete continuous culvert carrying FH-3 Lake Mary RD over Sheep Tank Wash in Coconino County, Arizona. It was built in 1968, so it is 57 years old, older than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 720 vehicles a day, roughly 2% of them trucks, projected to reach 730 by 2042. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 60.3 mi (97 km).

CarriesFH-3 Lake Mary RD
CrossesSheep Tank Wash
Location9.4 MI N JCT SR 87
RouteCounty Highway 0
StateArizona
Coordinates34.6657, -111.379
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJuly 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic720 (2022)
Projected traffic730 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed60.3 mi (97 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 FH-3 Lake Mary RD over Sheep Tank Wash built?

It was built in 1968, making it 57 years old in 2025.

What condition is FH-3 Lake Mary RD over Sheep Tank Wash in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2022.

How much traffic does FH-3 Lake Mary RD over Sheep Tank Wash carry?

About 720 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is FH-3 Lake Mary RD over Sheep Tank Wash?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns FH-3 Lake Mary RD over Sheep Tank Wash?

It is owned by the County Highway Agency.