US Bridges

Mar-Casa Grnd HWY over Unnamed Wash

Good

Pinal County, Arizona · 3.9 MI NW JCT SR 387 · Structure no. 09073

Built
1959
66 years old
Condition
Good
inspected October 2021
Type
Culvert
Concrete Continuous
Length
32 ft
3 main spans
Daily traffic
5,213
2020 count
Owner
County
County Highway Agency

About this bridge

Mar-Casa Grnd HWY over Unnamed Wash is a concrete continuous culvert carrying Mar-Casa Grnd HWY over Unnamed Wash in Pinal County, Arizona. It was built in 1959, so it is 66 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 5,213 vehicles a day, roughly 10% of them trucks, projected to reach 5,223 by 2040. The structure is 32 ft (9.8 m) long and 33 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesMar-Casa Grnd HWY
CrossesUnnamed Wash
Location3.9 MI NW JCT SR 387
RouteCounty Highway 0
CountyPinal County
StateArizona
Coordinates32.92222, -111.83056
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 inspectionOctober 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating35.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span10 ft (3 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,213 (2020)
Projected traffic5,223 by 2040
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 Mar-Casa Grnd HWY over Unnamed Wash built?

It was built in 1959, making it 66 years old in 2025.

What condition is Mar-Casa Grnd HWY over Unnamed 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 October 2021.

How much traffic does Mar-Casa Grnd HWY over Unnamed Wash carry?

About 5,213 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Mar-Casa Grnd HWY over Unnamed Wash?

The structure is 32 ft (9.8 m) long with a longest span of 10 ft (3 m) and a deck 33 ft wide.

Who owns Mar-Casa Grnd HWY over Unnamed Wash?

It is owned by the County Highway Agency.