US Bridges

SR 821 over Lmuma Creek

Fair

Kittitas County, Washington · 7.9 N Yakima CO · Structure no. 0000652B0000000

Built
1924
101 years old
Condition
Fair
inspected September 2023
Type
Slab
Concrete Continuous
Length
66 ft
3 main spans
Daily traffic
1,374
2023 count
Owner
State
State Highway Agency

About this bridge

SR 821 over Lmuma Creek is a concrete continuous slab carrying SR 821 over Lmuma Creek in Kittitas County, Washington. It was built in 1924, so it is 101 years old, older 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 1,374 vehicles a day, roughly 7% of them trucks, projected to reach 1,735 by 2039. The structure is 66 ft (20.1 m) long and 27 ft wide. If it were closed, the detour would be 52.2 mi (84 km).

Location

Open in Google Maps
CarriesSR 821
CrossesLmuma Creek
Location7.9 N Yakima CO
RouteState Highway 821
CountyKittitas County
StateWashington
Coordinates46.81878, -120.45517
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating32 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length66 ft (20.1 m)
Longest span21 ft (6.4 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,374 (2023)
Projected traffic1,735 by 2039
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed52.2 mi (84 km)
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$940,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 821 over Lmuma Creek built?

It was built in 1924, making it 101 years old in 2025.

What condition is SR 821 over Lmuma Creek 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 2023.

How much traffic does SR 821 over Lmuma Creek carry?

About 1,374 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is SR 821 over Lmuma Creek?

The structure is 66 ft (20.1 m) long with a longest span of 21 ft (6.4 m) and a deck 27 ft wide.

Who owns SR 821 over Lmuma Creek?

It is owned by the State Highway Agency.