US Bridges

220th ST over Rock Run Creek

Fair

Cedar County, Iowa · 080030505 · Structure no. 000000000102961

Built
1975
50 years old
Condition
Fair
inspected May 2024
Type
Tee Beam
Prestressed Concrete
Length
100 ft
3 main spans
Daily traffic
71
2022 count
Owner
County
County Highway Agency

About this bridge

220th ST over Rock Run Creek is a prestressed concrete tee beam carrying 220th ST over Rock Run Creek in Cedar County, Iowa. It was built in 1975, so it is 50 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 71 vehicles a day, projected to reach 71 by 2044. The structure is 100 ft (30.5 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries220th ST
CrossesRock Run Creek
Location080030505
RouteCounty Highway 0
CountyCedar County
StateIowa
Coordinates41.77217, -91.21485
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60.7 US tons
Inventory rating36.4 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadUnknown
Structure length100 ft (30.5 m)
Longest span34 ft (10.4 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic71 (2022)
Projected traffic71 by 2044
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 220th ST over Rock Run Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is 220th ST over Rock Run 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 May 2024.

How much traffic does 220th ST over Rock Run Creek carry?

About 71 vehicles per day (2022 count).

How long is 220th ST over Rock Run Creek?

The structure is 100 ft (30.5 m) long with a longest span of 34 ft (10.4 m) and a deck 30 ft wide.

Who owns 220th ST over Rock Run Creek?

It is owned by the County Highway Agency.