US Bridges

220th ST over Spooner Ditch

Fair

Harrison County, Iowa · 079440501 · Structure no. 000000000178250

Built
1970
55 years old
Condition
Fair
inspected December 2023
Type
Tee Beam
Prestressed Concrete
Length
26 ft
1 main span
Daily traffic
11
2022 count
Owner
County
County Highway Agency

About this bridge

220th ST over Spooner Ditch is a prestressed concrete tee beam carrying 220th ST over Spooner Ditch in Harrison County, Iowa. It was built in 1970, so it is 55 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 5 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 11 vehicles a day, projected to reach 11 by 2043. The structure is 26 ft (7.9 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
CrossesSpooner Ditch
Location079440501
RouteCounty Highway 0
CountyHarrison County
StateIowa
Coordinates41.6894, -96.00196
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.9 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span26 ft (7.9 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11 (2022)
Projected traffic11 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 220th ST over Spooner Ditch built?

It was built in 1970, making it 55 years old in 2025.

What condition is 220th ST over Spooner 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 December 2023.

How much traffic does 220th ST over Spooner Ditch carry?

About 11 vehicles per day (2022 count).

How long is 220th ST over Spooner Ditch?

The structure is 26 ft (7.9 m) long with a longest span of 26 ft (7.9 m) and a deck 30 ft wide.

Who owns 220th ST over Spooner Ditch?

It is owned by the County Highway Agency.