US Bridges

Kolisch RD E over Carbon River

PoorPosted for load

Pierce County, Washington · 00.6 E Fairfax RD · Structure no. 084735000000000

Built
1937
88 years old, rebuilt 1966
Condition
Poor
inspected April 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
150 ft
1 main span
Daily traffic
100
2021 count
Owner
County
County Highway Agency

About this bridge

Kolisch RD E over Carbon River is a wood or timber stringer/multi-beam or girder carrying Kolisch RD E over Carbon River in Pierce County, Washington. It was built in 1937 and reconstructed in 1966, so it is 88 years old, older than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 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. Its operating status is: posted for load restriction.

It carries about 100 vehicles a day, roughly 3% of them trucks, projected to reach 165 by 2042. The structure is 150 ft (45.7 m) long and 15 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesKolisch RD E
CrossesCarbon River
Location00.6 E Fairfax RD
RouteCounty Highway 75610
Coordinates47.00486, -121.99908
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30 US tons
Inventory rating17 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1 (+2 approach)
Design loadHS 15
Structure length150 ft (45.7 m)
Longest span92 ft (28 m)
Deck width15 ft (4.6 m)
Roadway width13 ft (4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2021)
Projected traffic165 by 2042
Trucks3%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed98.8 mi (159 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$2.8 million (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Kolisch RD E over Carbon River built?

It was built in 1937, making it 88 years old in 2025. It was reconstructed in 1966.

What condition is Kolisch RD E over Carbon River 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 April 2023.

How much traffic does Kolisch RD E over Carbon River carry?

About 100 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Kolisch RD E over Carbon River?

The structure is 150 ft (45.7 m) long with a longest span of 92 ft (28 m) and a deck 15 ft wide.

Who owns Kolisch RD E over Carbon River?

It is owned by the County Highway Agency.