US Bridges

W. 70th Ave. N. over Trib. to Slate Creek

Fair

Sumner County, Kansas · 0.4S 1.0E of Anson · Structure no. 000960801006640

Built
1920
105 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete
Length
32 ft
2 main spans
Daily traffic
15
2013 count
Owner
County
County Highway Agency

About this bridge

W. 70th Ave. N. over Trib. to Slate Creek is a concrete slab carrying W. 70th Ave. N. over Trib. to Slate Creek in Sumner County, Kansas. It was built in 1920, so it is 105 years old, older than the Kansas average of 52.8 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.

It carries about 15 vehicles a day, roughly 2% of them trucks, projected to reach 15 by 2043. The structure is 32 ft (9.8 m) long and 20 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesW. 70th Ave. N.
CrossesTrib. to Slate Creek
Location0.4S 1.0E of Anson
RouteCounty Highway 0
CountySumner County
StateKansas
Coordinates37.35944, -97.51222
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
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
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating36 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span15 ft (4.7 m)
Deck width20 ft (6.1 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic15 (2013)
Projected traffic15 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was W. 70th Ave. N. over Trib. to Slate Creek built?

It was built in 1920, making it 105 years old in 2025.

What condition is W. 70th Ave. N. over Trib. to Slate 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 May 2023.

How much traffic does W. 70th Ave. N. over Trib. to Slate Creek carry?

About 15 vehicles per day (2013 count), of which roughly 2% are trucks.

How long is W. 70th Ave. N. over Trib. to Slate Creek?

The structure is 32 ft (9.8 m) long with a longest span of 15 ft (4.7 m) and a deck 20 ft wide.

Who owns W. 70th Ave. N. over Trib. to Slate Creek?

It is owned by the County Highway Agency.