US Bridges

County RD X-31 over Mino Creek

Poor

Jones County, Iowa · 085043404 · Structure no. 000000000208650

Built
1966
59 years old
Condition
Poor
inspected December 2023
Type
Culvert
Steel
Length
42 ft
2 main spans
Daily traffic
520
2022 count
Owner
County
County Highway Agency

About this bridge

County RD X-31 over Mino Creek is a steel culvert carrying County RD X-31 over Mino Creek in Jones County, Iowa. It was built in 1966, so it is 59 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 4 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 520 vehicles a day, projected to reach 520 by 2043. The structure is 42 ft (12.8 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesCounty RD X-31
CrossesMino Creek
Location085043404
RouteCounty Highway 0
CountyJones County
StateIowa
Coordinates42.13144, -91.29428
Functional classUrban Minor Arterial

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
Channel and channel protection7 GoodSome minor problems.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadH 20
Structure length42 ft (12.8 m)
Longest span18 ft (5.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic520 (2022)
Projected traffic520 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD X-31 over Mino Creek built?

It was built in 1966, making it 59 years old in 2025.

What condition is County RD X-31 over Mino 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 December 2023.

How much traffic does County RD X-31 over Mino Creek carry?

About 520 vehicles per day (2022 count).

How long is County RD X-31 over Mino Creek?

The structure is 42 ft (12.8 m) long with a longest span of 18 ft (5.5 m).

Who owns County RD X-31 over Mino Creek?

It is owned by the County Highway Agency.