US Bridges

Mobile Ave over Hoffman Creek

Poor

Harrison County, Iowa · 080432202 · Structure no. 000000000178850

Built
1940
85 years old, rebuilt 1962
Condition
Poor
inspected November 2022
Type
Truss - Thru
Steel
Length
83 ft
1 main span
Daily traffic
29
2022 count
Owner
County
County Highway Agency

About this bridge

Mobile Ave over Hoffman Creek is a steel truss - thru carrying Mobile Ave over Hoffman Creek in Harrison County, Iowa. It was built in 1940 and reconstructed in 1962, so it is 85 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 29 vehicles a day, projected to reach 29 by 2043. The structure is 83 ft (25.3 m) long and 20 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesMobile Ave
CrossesHoffman Creek
Location080432202
RouteCounty Highway 0
StateIowa
Coordinates41.73098, -95.84782
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionNovember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating45.7 US tons
Inventory rating30.6 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length83 ft (25.3 m)
Longest span80 ft (24.4 m)
Deck width20 ft (6.2 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29 (2022)
Projected traffic29 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mobile Ave over Hoffman Creek built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 1962.

What condition is Mobile Ave over Hoffman Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2022.

How much traffic does Mobile Ave over Hoffman Creek carry?

About 29 vehicles per day (2022 count).

How long is Mobile Ave over Hoffman Creek?

The structure is 83 ft (25.3 m) long with a longest span of 80 ft (24.4 m) and a deck 20 ft wide.

Who owns Mobile Ave over Hoffman Creek?

It is owned by the County Highway Agency.