US Bridges

Koontz RD over I-5

FairPosted for load

Lewis County, Washington · 1.0 N JCT US 12 · Structure no. 0010173A0000000

Built
1976
49 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
166 ft
2 main spans
Daily traffic
603
2011 count
Owner
State
State Highway Agency

About this bridge

Koontz RD over I-5 is a prestressed concrete continuous stringer/multi-beam or girder carrying Koontz RD over I-5 in Lewis County, Washington. It was built in 1976, so it is 49 years old, younger than the Washington average of 49.8 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. Its operating status is: posted for other load-capacity restriction.

It carries about 603 vehicles a day, roughly 10% of them trucks, projected to reach 829 by 2036. The structure is 166 ft (50.6 m) long and 31 ft wide.

Location

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CarriesKoontz RD
CrossesI-5
Location1.0 N JCT US 12
RouteCounty Highway 0
CountyLewis County
StateWashington
Coordinates46.56169, -122.87692
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.5 US tons
Inventory rating33.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length166 ft (50.6 m)
Longest span80 ft (24.4 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic603 (2011)
Projected traffic829 by 2036
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.4 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Koontz RD over I-5 built?

It was built in 1976, making it 49 years old in 2025.

What condition is Koontz RD over I-5 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 June 2024.

How much traffic does Koontz RD over I-5 carry?

About 603 vehicles per day (2011 count), of which roughly 10% are trucks.

How long is Koontz RD over I-5?

The structure is 166 ft (50.6 m) long with a longest span of 80 ft (24.4 m) and a deck 31 ft wide.

Who owns Koontz RD over I-5?

It is owned by the State Highway Agency.