US Bridges

Brownsmead Dike RD over Saspal Slough

Fair

Clatsop County, Oregon · 022 MI N HWY 30 · Structure no. 11129 020300030

Built
1959
66 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
241 ft
8 main spans
Daily traffic
338
2020 count
Owner
County
County Highway Agency

About this bridge

Brownsmead Dike RD over Saspal Slough is a concrete stringer/multi-beam or girder carrying Brownsmead Dike RD over Saspal Slough in Clatsop County, Oregon. It was built in 1959, so it is 66 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 338 vehicles a day, roughly 10% of them trucks, projected to reach 388 by 2025. The structure is 241 ft (73.5 m) long and 27 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

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CarriesBrownsmead Dike RD
CrossesSaspal Slough
Location022 MI N HWY 30
RouteCounty Highway C0203
CountyClatsop County
StateOregon
Coordinates46.20689, -123.53349
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating65.4 US tons
Inventory rating50.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans8
Design loadUnknown
Structure length241 ft (73.5 m)
Longest span30 ft (9.1 m)
Deck width27 ft (8.2 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic338 (2020)
Projected traffic388 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Brownsmead Dike RD over Saspal Slough built?

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

What condition is Brownsmead Dike RD over Saspal Slough 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 April 2023.

How much traffic does Brownsmead Dike RD over Saspal Slough carry?

About 338 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Brownsmead Dike RD over Saspal Slough?

The structure is 241 ft (73.5 m) long with a longest span of 30 ft (9.1 m) and a deck 27 ft wide.

Who owns Brownsmead Dike RD over Saspal Slough?

It is owned by the County Highway Agency.