US Bridges

E Schrock RD over Trib to Miller Creek

Fair

Black Hawk County, Iowa · 88-12-31-01-10 · Structure no. 000000000075190

Built
1938
87 years old, rebuilt 1996
Condition
Fair
inspected March 2024
Type
Culvert
Concrete Continuous
Length
24 ft
2 main spans
Daily traffic
412
2022 count
Owner
County
County Highway Agency

About this bridge

E Schrock RD over Trib to Miller Creek is a concrete continuous culvert carrying E Schrock RD over Trib to Miller Creek in Black Hawk County, Iowa. It was built in 1938 and reconstructed in 1996, so it is 87 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 412 vehicles a day, roughly 25% of them trucks, projected to reach 412 by 2044. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 1.9 mi (3 km).

CarriesE Schrock RD
CrossesTrib to Miller Creek
Location88-12-31-01-10
RouteCounty Highway 0
StateIowa
Coordinates42.39937, -92.28403
Functional classRural Major 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 protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.4 US tons
Inventory rating24.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadUnknown
Structure length24 ft (7.3 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 traffic412 (2022)
Projected traffic412 by 2044
Trucks25%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was E Schrock RD over Trib to Miller Creek built?

It was built in 1938, making it 87 years old in 2025. It was reconstructed in 1996.

What condition is E Schrock RD over Trib to Miller Creek 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 March 2024.

How much traffic does E Schrock RD over Trib to Miller Creek carry?

About 412 vehicles per day (2022 count), of which roughly 25% are trucks.

How long is E Schrock RD over Trib to Miller Creek?

The structure is 24 ft (7.3 m) long with a longest span of 12 ft (3.7 m).

Who owns E Schrock RD over Trib to Miller Creek?

It is owned by the County Highway Agency.