US Bridges

US 63 over Drainage Ditch

Fair

Tama County, Iowa · 3.0 Miles S of JCT SR E29 · Structure no. 000000000600900

Built
1976
49 years old
Condition
Fair
inspected October 2024
Type
Culvert
Concrete Continuous
Length
26 ft
2 main spans
Daily traffic
3,160
2022 count
Owner
State
State Highway Agency

About this bridge

US 63 over Drainage Ditch is a concrete continuous culvert carrying US 63 over Drainage Ditch in Tama County, Iowa. It was built in 1976, so it is 49 years old, older than the Iowa average of 45.5 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 3,160 vehicles a day, roughly 17% of them trucks, projected to reach 3,160 by 2044. The structure is 26 ft (7.9 m) long. If it were closed, the detour would be 9.9 mi (16 km).

CarriesUS 63
CrossesDrainage Ditch
Location3.0 Miles S of JCT SR E29
RouteU.S. Route 63
StateIowa
Coordinates42.05746, -92.58149
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.3 US tons
Inventory rating33.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,160 (2022)
Projected traffic3,160 by 2044
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 63 over Drainage Ditch built?

It was built in 1976, making it 49 years old in 2025.

What condition is US 63 over Drainage Ditch 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 October 2024.

How much traffic does US 63 over Drainage Ditch carry?

About 3,160 vehicles per day (2022 count), of which roughly 17% are trucks.

How long is US 63 over Drainage Ditch?

The structure is 26 ft (7.9 m) long with a longest span of 12 ft (3.7 m).

Who owns US 63 over Drainage Ditch?

It is owned by the State Highway Agency.