US Bridges

Chilvers Rd. over Mill Cr.

Fair

Lewis County, Washington · 1.00 N Littell · Structure no. 084620000000000

Built
1980
45 years old
Condition
Fair
inspected February 2023
Type
Slab
Prestressed Concrete
Length
28 ft
1 main span
Daily traffic
774
2022 count
Owner
County
County Highway Agency

About this bridge

Chilvers Rd. over Mill Cr. is a prestressed concrete slab carrying Chilvers Rd. over Mill Cr. in Lewis County, Washington. It was built in 1980, so it is 45 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 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 774 vehicles a day, roughly 16% of them trucks, projected to reach 1,397 by 2042. The structure is 28 ft (8.5 m) long and 33 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesChilvers Rd.
CrossesMill Cr.
Location1.00 N Littell
RouteCounty Highway 24009
CountyLewis County
StateWashington
Coordinates46.64819, -123.04838
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73 US tons
Inventory rating43 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length28 ft (8.5 m)
Longest span27 ft (8.2 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic774 (2022)
Projected traffic1,397 by 2042
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$399,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Chilvers Rd. over Mill Cr. built?

It was built in 1980, making it 45 years old in 2025.

What condition is Chilvers Rd. over Mill Cr. 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 February 2023.

How much traffic does Chilvers Rd. over Mill Cr. carry?

About 774 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is Chilvers Rd. over Mill Cr.?

The structure is 28 ft (8.5 m) long with a longest span of 27 ft (8.2 m) and a deck 33 ft wide.

Who owns Chilvers Rd. over Mill Cr.?

It is owned by the County Highway Agency.