US Bridges

1380 300th ST over Dd 1&2

Fair

Hancock County, Iowa · 097243001 · Structure no. 000000000174200

Built
1956
69 years old
Condition
Fair
inspected April 2023
Type
Channel Beam
Concrete
Length
26 ft
1 main span
Daily traffic
11
2021 count
Owner
County
County Highway Agency

About this bridge

1380 300th ST over Dd 1&2 is a concrete channel beam carrying 1380 300th ST over Dd 1&2 in Hancock County, Iowa. It was built in 1956, so it is 69 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 25 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries1380 300th ST
CrossesDd 1&2
Location097243001
RouteCounty Highway 0
CountyHancock County
StateIowa
Coordinates43.19832, -93.71747
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating47.2 US tons
Inventory rating30.3 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadH 15
Structure length26 ft (7.9 m)
Longest span24 ft (7.3 m)
Deck width25 ft (7.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11 (2021)
Projected traffic11 by 2043
Trucks0%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 1380 300th ST over Dd 1&2 built?

It was built in 1956, making it 69 years old in 2025.

What condition is 1380 300th ST over Dd 1&2 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 April 2023.

How much traffic does 1380 300th ST over Dd 1&2 carry?

About 11 vehicles per day (2021 count).

How long is 1380 300th ST over Dd 1&2?

The structure is 26 ft (7.9 m) long with a longest span of 24 ft (7.3 m) and a deck 25 ft wide.

Who owns 1380 300th ST over Dd 1&2?

It is owned by the County Highway Agency.