US Bridges

County RD 153G over South Fork Coquille R.

Poor

Coos County, Oregon · 003 Mile N Gaylord Postof · Structure no. 16349 015300000

Built
1979
46 years old
Condition
Poor
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
188 ft
1 main span
Daily traffic
84
2020 count
Owner
County
County Highway Agency

About this bridge

County RD 153G over South Fork Coquille R. is a prestressed concrete stringer/multi-beam or girder carrying County RD 153G over South Fork Coquille R. in Coos County, Oregon. It was built in 1979, so it is 46 years old, younger than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 2 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 84 vehicles a day, roughly 20% of them trucks, projected to reach 107 by 2025. The structure is 188 ft (57.3 m) long and 27 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesCounty RD 153G
CrossesSouth Fork Coquille R.
Location003 Mile N Gaylord Postof
RouteCounty Highway C153G
StateOregon
Coordinates42.95587, -124.10691
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure2 CriticalAdvanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating22.5 US tons
Inventory rating17.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length188 ft (57.3 m)
Longest span187 ft (57 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic84 (2020)
Projected traffic107 by 2025
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 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 County RD 153G over South Fork Coquille R. built?

It was built in 1979, making it 46 years old in 2025.

What condition is County RD 153G over South Fork Coquille R. in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2024.

How much traffic does County RD 153G over South Fork Coquille R. carry?

About 84 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is County RD 153G over South Fork Coquille R.?

The structure is 188 ft (57.3 m) long with a longest span of 187 ft (57 m) and a deck 27 ft wide.

Who owns County RD 153G over South Fork Coquille R.?

It is owned by the County Highway Agency.