US Bridges

C-11.9 64 over South Fork Mill Creek

Good

Washington County, Kansas · 0.9S 1.5W of Haddam · Structure no. 001010821003209

Built
2011
14 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
74 ft
3 main spans
Daily traffic
10
2014 count
Owner
County
County Highway Agency

About this bridge

C-11.9 64 over South Fork Mill Creek is a steel stringer/multi-beam or girder carrying C-11.9 64 over South Fork Mill Creek in Washington County, Kansas. It was built in 2011, so it is 14 years old, younger than the Kansas average of 52.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 10 vehicles a day, projected to reach 10 by 2043. The structure is 74 ft (22.5 m) long and 20 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesC-11.9 64
CrossesSouth Fork Mill Creek
Location0.9S 1.5W of Haddam
RouteCounty Highway 0
StateKansas
Coordinates39.84627, -97.3322
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating67 US tons
Inventory rating40.1 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans3
Design loadHS 20
Structure length74 ft (22.5 m)
Longest span29 ft (8.9 m)
Deck width20 ft (6.2 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic10 (2014)
Projected traffic10 by 2043
Trucks0%
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 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 C-11.9 64 over South Fork Mill Creek built?

It was built in 2011, making it 14 years old in 2025.

What condition is C-11.9 64 over South Fork Mill Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2023.

How much traffic does C-11.9 64 over South Fork Mill Creek carry?

About 10 vehicles per day (2014 count).

How long is C-11.9 64 over South Fork Mill Creek?

The structure is 74 ft (22.5 m) long with a longest span of 29 ft (8.9 m) and a deck 20 ft wide.

Who owns C-11.9 64 over South Fork Mill Creek?

It is owned by the County Highway Agency.