US Bridges

Marsh Station RD over Medium Wash

FairPosted for load

Pima County, Arizona · 4.7 MI N of I 10 Exit 289 · Structure no. 08294

Built
1933
92 years old
Condition
Fair
inspected December 2023
Type
Slab
Concrete Continuous
Length
36 ft
2 main spans
Daily traffic
507
2022 count
Owner
County
County Highway Agency

About this bridge

Marsh Station RD over Medium Wash is a concrete continuous slab carrying Marsh Station RD over Medium Wash in Pima County, Arizona. It was built in 1933, so it is 92 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. Its operating status is: posted for load restriction.

It carries about 507 vehicles a day, projected to reach 517 by 2042. The structure is 36 ft (11 m) long and 27 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

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CarriesMarsh Station RD
CrossesMedium Wash
Location4.7 MI N of I 10 Exit 289
RouteCounty Highway 0
CountyPima County
StateArizona
Coordinates32.0231, -110.6222
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating42 US tons
Inventory rating25 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length36 ft (11 m)
Longest span15 ft (4.6 m)
Deck width27 ft (8.3 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic507 (2022)
Projected traffic517 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Marsh Station RD over Medium Wash built?

It was built in 1933, making it 92 years old in 2025.

What condition is Marsh Station RD over Medium Wash 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 December 2023.

How much traffic does Marsh Station RD over Medium Wash carry?

About 507 vehicles per day (2022 count).

How long is Marsh Station RD over Medium Wash?

The structure is 36 ft (11 m) long with a longest span of 15 ft (4.6 m) and a deck 27 ft wide.

Who owns Marsh Station RD over Medium Wash?

It is owned by the County Highway Agency.