US Bridges

Maggie Mine RD over Unamed Wash

Good

Yavapai County, Arizona · 0.57 MI W of Blk Cyn HWY · Structure no. 10710

Built
1980
45 years old
Condition
Good
inspected July 2023
Type
Culvert
Steel
Length
21 ft
4 main spans
Daily traffic
448
2021 count
Owner
County
County Highway Agency

About this bridge

Maggie Mine RD over Unamed Wash is a steel culvert carrying Maggie Mine RD over Unamed Wash in Yavapai County, Arizona. It was built in 1980, so it is 45 years old, younger 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 448 vehicles a day, roughly 1% of them trucks, projected to reach 458 by 2041. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesMaggie Mine RD
CrossesUnamed Wash
Location0.57 MI W of Blk Cyn HWY
RouteCounty Highway 0
CountyYavapai County
StateArizona
Coordinates34.09067, -112.14869
Functional classRural Minor Collector

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 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating71 US tons
Inventory rating41 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans4
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span4 ft (1.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic448 (2021)
Projected traffic458 by 2041
Trucks1%
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

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 Maggie Mine RD over Unamed Wash built?

It was built in 1980, making it 45 years old in 2025.

What condition is Maggie Mine RD over Unamed 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 2023.

How much traffic does Maggie Mine RD over Unamed Wash carry?

About 448 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is Maggie Mine RD over Unamed Wash?

The structure is 21 ft (6.4 m) long with a longest span of 4 ft (1.2 m).

Who owns Maggie Mine RD over Unamed Wash?

It is owned by the County Highway Agency.