J20 Salem RD over Mud Creek

Good

Henry County, Iowa · 070052705 · Structure no. 000000000179971

Built: 2019; 6 years old
Condition: Good; inspected February 2022
Type: Slab; Concrete Continuous
Length: 151 ft; 3 main spans
Daily traffic: 400; 2022 count
Owner: County; County Highway Agency

About this bridge

J20 Salem RD over Mud Creek is a concrete continuous slab carrying J20 Salem RD over Mud Creek in Henry County, Iowa. It was built in 2019, so it is 6 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 400 vehicles a day, roughly 13% of them trucks, projected to reach 400 by 2043. The structure is 151 ft (46 m) long and 33 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

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CarriesJ20 Salem RD

CrossesMud Creek

Location070052705

RouteCounty Highway 0

CountyHenry County

StateIowa

Coordinates40.82949, -91.4232

Functional classRural Major Collector

Condition and inspection

Good

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

Component	Rating	Meaning
Deck	8 Very Good	No problems noted.
Superstructure	8 Very Good	No problems noted.
Substructure	8 Very Good	No problems noted.
Channel and channel protection	8 Very Good	No problems noted.

Last inspectionFebruary 2022

Inspection intervalevery 48 months

Operating statusOpen, no restriction

ScourFoundations stable; scour within limits of footing or piles

Structural evaluation8: Equal to present desirable criteria

Deck geometry6: Equal to present minimum criteria

Waterway adequacy6: Equal to present minimum criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating46.4 US tons

Inventory rating35.7 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadHL 93

Structure length151 ft (46 m)

Longest span59 ft (18 m)

Deck width33 ft (10.1 m)

Roadway width31 ft (9.3 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (2022)

Projected traffic400 by 2043

Trucks13%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed11.2 mi (18 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—

NavigationNo navigation control on waterway

Frequently asked questions

When was J20 Salem RD over Mud Creek built?

It was built in 2019, making it 6 years old in 2025.

What condition is J20 Salem RD over Mud 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 February 2022.

How much traffic does J20 Salem RD over Mud Creek carry?

About 400 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is J20 Salem RD over Mud Creek?

The structure is 151 ft (46 m) long with a longest span of 59 ft (18 m) and a deck 33 ft wide.

Who owns J20 Salem RD over Mud Creek?

It is owned by the County Highway Agency.