US Bridges

NW Thurman ST over B-15 X Macleay Park

Fair

Multnomah County, Oregon · Balch Gulch at Forest Pk · Structure no. 25B15 000 00001

Built
1905
120 years old
Condition
Fair
inspected September 2024
Type
Truss - Deck
Steel
Length
400 ft
2 main spans
Daily traffic
4,501
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

NW Thurman ST over B-15 X Macleay Park is a steel truss - deck carrying NW Thurman ST over B-15 X Macleay Park in Multnomah County, Oregon. It was built in 1905, so it is 120 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 5 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 4,501 vehicles a day, roughly 1% of them trucks, projected to reach 4,736 by 2025. The structure is 400 ft (121.9 m) long and 40 ft wide.

Location

Open in Google Maps
CarriesNW Thurman ST
CrossesB-15 X Macleay Park
LocationBalch Gulch at Forest Pk
RouteCity Street 9305
CountyMultnomah County
StateOregon
Coordinates45.53555, -122.71263
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment6: Equal to present minimum criteria
Operating rating22.8 US tons
Inventory rating17.9 US tons

Structure

Structure typeTruss - Deck
MaterialSteel
DeckCorrugated steel
Main spans2 (+9 approach)
Design loadH 10
Structure length400 ft (121.9 m)
Longest span160 ft (48.8 m)
Deck width40 ft (12.2 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,501 (2020)
Projected traffic4,736 by 2025
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesPedestrian / bicycle
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$2 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was NW Thurman ST over B-15 X Macleay Park built?

It was built in 1905, making it 120 years old in 2025.

What condition is NW Thurman ST over B-15 X Macleay Park 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 September 2024.

How much traffic does NW Thurman ST over B-15 X Macleay Park carry?

About 4,501 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is NW Thurman ST over B-15 X Macleay Park?

The structure is 400 ft (121.9 m) long with a longest span of 160 ft (48.8 m) and a deck 40 ft wide.

Who owns NW Thurman ST over B-15 X Macleay Park?

It is owned by the City or Municipal Highway Agency.