US Bridges

Red Rock RD.21.50 over Drain

PoorPosted for load

Reno County, Kansas · 0.2W 1.8S of Partridge · Structure no. 000780737505840

Built
1968
57 years old
Condition
Poor
inspected July 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
31 ft
2 main spans
Daily traffic
12
2021 count
Owner
County
County Highway Agency

About this bridge

Red Rock RD.21.50 over Drain is a wood or timber stringer/multi-beam or girder carrying Red Rock RD.21.50 over Drain in Reno County, Kansas. It was built in 1968, so it is 57 years old, older than the Kansas average of 52.8 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 12 vehicles a day, roughly 8% of them trucks, projected to reach 15 by 2046. The structure is 31 ft (9.6 m) long and 22 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesRed Rock RD.21.50
CrossesDrain
Location0.2W 1.8S of Partridge
RouteCounty Highway 7814
StateKansas
Coordinates37.94131, -98.09637
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating5.1 US tons
Inventory rating3.2 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadUnknown
Structure length31 ft (9.6 m)
Longest span15 ft (4.6 m)
Deck width22 ft (6.7 m)
Roadway width21 ft (6.5 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic12 (2021)
Projected traffic15 by 2046
Trucks8%
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 statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$430,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Red Rock RD.21.50 over Drain built?

It was built in 1968, making it 57 years old in 2025.

What condition is Red Rock RD.21.50 over Drain 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 July 2024.

How much traffic does Red Rock RD.21.50 over Drain carry?

About 12 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is Red Rock RD.21.50 over Drain?

The structure is 31 ft (9.6 m) long with a longest span of 15 ft (4.6 m) and a deck 22 ft wide.

Who owns Red Rock RD.21.50 over Drain?

It is owned by the County Highway Agency.