US Bridges

Olalla Road over Olalla Creek

Good

Douglas County, Oregon · 4.0 MI S of Porter Creek · Structure no. 22544 38 285

Built
2017
8 years old
Condition
Good
inspected July 2023
Type
Tee Beam
Prestressed Concrete
Length
145 ft
1 main span
Daily traffic
1,504
2020 count
Owner
County
County Highway Agency

About this bridge

Olalla Road over Olalla Creek is a prestressed concrete tee beam carrying Olalla Road over Olalla Creek in Douglas County, Oregon. It was built in 2017, so it is 8 years old, younger than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,504 vehicles a day, roughly 15% of them trucks, projected to reach 1,699 by 2025. The structure is 145 ft (44.2 m) long and 39 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesOlalla Road
CrossesOlalla Creek
Location4.0 MI S of Porter Creek
RouteCounty Highway C0038
CountyDouglas County
StateOregon
Coordinates43.08038, -123.52489
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.8 US tons
Inventory rating48.6 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHL 93
Structure length145 ft (44.2 m)
Longest span145 ft (44.2 m)
Deck width39 ft (11.8 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,504 (2020)
Projected traffic1,699 by 2025
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.1 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Olalla Road over Olalla Creek built?

It was built in 2017, making it 8 years old in 2025.

What condition is Olalla Road over Olalla Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.

How much traffic does Olalla Road over Olalla Creek carry?

About 1,504 vehicles per day (2020 count), of which roughly 15% are trucks.

How long is Olalla Road over Olalla Creek?

The structure is 145 ft (44.2 m) long with a longest span of 145 ft (44.2 m) and a deck 39 ft wide.

Who owns Olalla Road over Olalla Creek?

It is owned by the County Highway Agency.