US Bridges

HWY 72 (12th St) over Shelton Ditch

Fair

Marion County, Oregon · City of Salem · Structure no. 08111 072 00623

Built
1929
96 years old, rebuilt 1956
Condition
Fair
inspected October 2024
Type
Arch - Deck
Concrete
Length
45 ft
1 main span
Daily traffic
17,817
2022 count
Owner
State
State Highway Agency

About this bridge

HWY 72 (12th St) over Shelton Ditch is a concrete arch - deck carrying HWY 72 (12th St) over Shelton Ditch in Marion County, Oregon. It was built in 1929 and reconstructed in 1956, so it is 96 years old, older than the Oregon average of 49.9 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 17,817 vehicles a day, roughly 3% of them trucks, projected to reach 20,250 by 2042. The structure is 45 ft (13.7 m) long and 58 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesHWY 72 (12th St)
CrossesShelton Ditch
LocationCity of Salem
RouteU.S. Route 72
CountyMarion County
StateOregon
Coordinates44.93264, -123.02926
Functional classUrban Other Principal Arterial

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 protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating33.6 US tons
Inventory rating26.1 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length45 ft (13.7 m)
Longest span45 ft (13.7 m)
Deck width58 ft (17.7 m)
Roadway width46 ft (14 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,817 (2022)
Projected traffic20,250 by 2042
Trucks3%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

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 HWY 72 (12th St) over Shelton Ditch built?

It was built in 1929, making it 96 years old in 2025. It was reconstructed in 1956.

What condition is HWY 72 (12th St) over Shelton Ditch 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 October 2024.

How much traffic does HWY 72 (12th St) over Shelton Ditch carry?

About 17,817 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is HWY 72 (12th St) over Shelton Ditch?

The structure is 45 ft (13.7 m) long with a longest span of 45 ft (13.7 m) and a deck 58 ft wide.

Who owns HWY 72 (12th St) over Shelton Ditch?

It is owned by the State Highway Agency.