US Bridges

Alternate HWY 101 over Ecola Cr. Br.

Fair

Clatsop County, Oregon · N.Cannon Beach 5th & 101 · Structure no. 01720 009F02870

Built
1964
61 years old
Condition
Fair
inspected April 2023
Type
Slab
Prestressed Concrete
Length
211 ft
7 main spans
Daily traffic
6,466
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Alternate HWY 101 over Ecola Cr. Br. is a prestressed concrete slab carrying Alternate HWY 101 over Ecola Cr. Br. in Clatsop 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 6,466 vehicles a day, roughly 10% of them trucks, projected to reach 10,250 by 2025. The structure is 211 ft (64.3 m) long and 44 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesAlternate HWY 101
CrossesEcola Cr. Br.
LocationN.Cannon Beach 5th & 101
RouteCity Street 0
CountyClatsop County
StateOregon
Coordinates45.90215, -123.95793
Functional classRural Major 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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.7 US tons
Inventory rating30.8 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans7
Design loadHS 20
Structure length211 ft (64.3 m)
Longest span30 ft (9.1 m)
Deck width44 ft (13.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,466 (2020)
Projected traffic10,250 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Alternate HWY 101 over Ecola Cr. Br. built?

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

What condition is Alternate HWY 101 over Ecola Cr. Br. 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 Alternate HWY 101 over Ecola Cr. Br. carry?

About 6,466 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Alternate HWY 101 over Ecola Cr. Br.?

The structure is 211 ft (64.3 m) long with a longest span of 30 ft (9.1 m) and a deck 44 ft wide.

Who owns Alternate HWY 101 over Ecola Cr. Br.?

It is owned by the City or Municipal Highway Agency.