US Bridges

County RD 1G over East Fork Coquille River

Fair

Coos County, Oregon · 3199 MI E Myrtle Point · Structure no. C1105 064 03199

Built
1971
54 years old
Condition
Fair
inspected September 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
73 ft
1 main span
Daily traffic
96
2020 count
Owner
County
County Highway Agency

About this bridge

County RD 1G over East Fork Coquille River is a prestressed concrete box beam or girders - multiple carrying County RD 1G over East Fork Coquille River in Coos County, Oregon. It was built in 1971, so it is 54 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 96 vehicles a day, roughly 1% of them trucks, projected to reach 111 by 2025. The structure is 73 ft (22.3 m) long and 24 ft wide. If it were closed, the detour would be 65.9 mi (106 km).

CarriesCounty RD 1G
CrossesEast Fork Coquille River
Location3199 MI E Myrtle Point
RouteCounty Highway A3960
StateOregon
Coordinates43.14528, -123.79856
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating54.7 US tons
Inventory rating42.1 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length73 ft (22.3 m)
Longest span67 ft (20.4 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic96 (2020)
Projected traffic111 by 2025
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed65.9 mi (106 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 1G over East Fork Coquille River built?

It was built in 1971, making it 54 years old in 2025.

What condition is County RD 1G over East Fork Coquille River 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 County RD 1G over East Fork Coquille River carry?

About 96 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is County RD 1G over East Fork Coquille River?

The structure is 73 ft (22.3 m) long with a longest span of 67 ft (20.4 m) and a deck 24 ft wide.

Who owns County RD 1G over East Fork Coquille River?

It is owned by the County Highway Agency.