US Bridges

IRR BIA RTE 1101 over Drainage Ditch

Good

Tama County, Iowa · Casino Entr at JCT HWY 30 · Structure no. 00000000000F407

Built
1994
31 years old
Condition
Good
inspected April 2024
Type
Culvert
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
5,358
2024 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA RTE 1101 over Drainage Ditch is a concrete continuous culvert carrying IRR BIA RTE 1101 over Drainage Ditch in Tama County, Iowa. It was built in 1994, so it is 31 years old, younger than the Iowa average of 45.5 years.

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

It carries about 5,358 vehicles a day, roughly 5% of them trucks, projected to reach 5,500 by 2044. The structure is 25 ft (7.6 m) long and 70 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesIRR BIA RTE 1101
CrossesDrainage Ditch
LocationCasino Entr at JCT HWY 30
RouteFederal Lands Road 1101
StateIowa
Coordinates41.99902, -92.66887
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.9 US tons
Inventory rating35.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span12 ft (3.6 m)
Deck width70 ft (21.3 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,358 (2024)
Projected traffic5,500 by 2044
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Indian Affairs
Maintained byBureau of Indian Affairs
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was IRR BIA RTE 1101 over Drainage Ditch built?

It was built in 1994, making it 31 years old in 2025.

What condition is IRR BIA RTE 1101 over Drainage Ditch 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 April 2024.

How much traffic does IRR BIA RTE 1101 over Drainage Ditch carry?

About 5,358 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is IRR BIA RTE 1101 over Drainage Ditch?

The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.6 m) and a deck 70 ft wide.

Who owns IRR BIA RTE 1101 over Drainage Ditch?

It is owned by the Bureau of Indian Affairs.