US Bridges

200th ST over Dd 81

Fair

Story County, Iowa · 084222603 · Structure no. 000000000315191

Built
2000
25 years old
Condition
Fair
inspected December 2022
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
40
2022 count
Owner
County
County Highway Agency

About this bridge

200th ST over Dd 81 is a concrete continuous culvert carrying 200th ST over Dd 81 in Story County, Iowa. It was built in 2000, so it is 25 years old, younger 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 40 vehicles a day, projected to reach 40 by 2043. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries200th ST
CrossesDd 81
Location084222603
RouteCounty Highway 0
CountyStory County
StateIowa
Coordinates42.06333, -93.37746
Functional classRural Minor Collector

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2022
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 rating76.4 US tons
Inventory rating45.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2022)
Projected traffic40 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 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 200th ST over Dd 81 built?

It was built in 2000, making it 25 years old in 2025.

What condition is 200th ST over Dd 81 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 December 2022.

How much traffic does 200th ST over Dd 81 carry?

About 40 vehicles per day (2022 count).

How long is 200th ST over Dd 81?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns 200th ST over Dd 81?

It is owned by the County Highway Agency.