US Bridges

410th ST over Mill Creek

Good

O'Brien County, Iowa · 095 41 16 01 · Structure no. 000000000260141

Built
2012
13 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
122 ft
3 main spans
Daily traffic
21
2022 count
Owner
County
County Highway Agency

About this bridge

410th ST over Mill Creek is a concrete stringer/multi-beam or girder carrying 410th ST over Mill Creek in O'Brien County, Iowa. It was built in 2012, so it is 13 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 21 vehicles a day, projected to reach 21 by 2043. The structure is 122 ft (37.2 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Carries410th ST
CrossesMill Creek
Location095 41 16 01
RouteCounty Highway 0
StateIowa
Coordinates43.05536, -95.69734
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65 US tons
Inventory rating38.9 US tons

Structure

MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length122 ft (37.2 m)
Longest span41 ft (12.5 m)
Deck width31 ft (9.6 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21 (2022)
Projected traffic21 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$50,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 410th ST over Mill Creek built?

It was built in 2012, making it 13 years old in 2025.

What condition is 410th ST over Mill Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.

How much traffic does 410th ST over Mill Creek carry?

About 21 vehicles per day (2022 count).

How long is 410th ST over Mill Creek?

The structure is 122 ft (37.2 m) long with a longest span of 41 ft (12.5 m) and a deck 31 ft wide.

Who owns 410th ST over Mill Creek?

It is owned by the County Highway Agency.