US Bridges

Monitor-Mckee RD over Zollner Creek

Fair

Marion County, Oregon · 025 MI North of Mt Angle · Structure no. 47C38 543

Built
1964
61 years old
Condition
Fair
inspected August 2024
Type
Slab
Wood or Timber
Length
80 ft
4 main spans
Daily traffic
2,663
2020 count
Owner
County
County Highway Agency

About this bridge

Monitor-Mckee RD over Zollner Creek is a wood or timber slab carrying Monitor-Mckee RD over Zollner Creek in Marion County, Oregon. It was built in 1964, so it is 61 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 2,663 vehicles a day, roughly 3% of them trucks, projected to reach 2,993 by 2025. The structure is 80 ft (24.4 m) long and 25 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesMonitor-Mckee RD
CrossesZollner Creek
Location025 MI North of Mt Angle
RouteCounty Highway C0543
CountyMarion County
StateOregon
Coordinates45.10028, -122.8223
Functional classRural Local

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 inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.2 US tons
Inventory rating21.8 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans4
Design loadH 20
Structure length80 ft (24.4 m)
Longest span20 ft (6.1 m)
Deck width25 ft (7.5 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,663 (2020)
Projected traffic2,993 by 2025
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$410,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Monitor-Mckee RD over Zollner Creek built?

It was built in 1964, making it 61 years old in 2025.

What condition is Monitor-Mckee RD over Zollner Creek 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 August 2024.

How much traffic does Monitor-Mckee RD over Zollner Creek carry?

About 2,663 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is Monitor-Mckee RD over Zollner Creek?

The structure is 80 ft (24.4 m) long with a longest span of 20 ft (6.1 m) and a deck 25 ft wide.

Who owns Monitor-Mckee RD over Zollner Creek?

It is owned by the County Highway Agency.