Highland Acres RD over Linn Creek

Good

Marshall County, Iowa · 083180912 · Structure no. 000000000242581

Built: 2007; 18 years old
Condition: Good; inspected November 2022
Type: Slab; Concrete Continuous
Length: 103 ft; 3 main spans
Daily traffic: 1,630; 2022 count
Owner: County; County Highway Agency

About this bridge

Highland Acres RD over Linn Creek is a concrete continuous slab carrying Highland Acres RD over Linn Creek in Marshall County, Iowa. It was built in 2007, so it is 18 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,630 vehicles a day, projected to reach 1,630 by 2042. The structure is 103 ft (31.4 m) long and 52 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesHighland Acres RD

CrossesLinn Creek

Location083180912

RouteCounty Highway 0

CountyMarshall County

StateIowa

Coordinates42.01618, -92.96011

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	7 Good	Some minor problems.
Superstructure	7 Good	Some minor problems.
Substructure	8 Very Good	No problems noted.
Channel and channel protection	8 Very Good	No problems noted.

Last inspectionNovember 2022

Inspection intervalevery 48 months

Operating statusOpen, no restriction

ScourFoundations stable; scour within limits of footing or piles

Structural evaluation7: Better than present minimum criteria

Deck geometry7: Better than present minimum criteria

Waterway adequacy8: Equal to present desirable criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating89.2 US tons

Inventory rating53.4 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadHS 20

Structure length103 ft (31.4 m)

Longest span39 ft (11.9 m)

Deck width52 ft (15.7 m)

Roadway width41 ft (12.6 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,630 (2022)

Projected traffic1,630 by 2042

Trucks0%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed5 mi (8 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 Highland Acres RD over Linn Creek built?

It was built in 2007, making it 18 years old in 2025.

What condition is Highland Acres RD over Linn 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 November 2022.

How much traffic does Highland Acres RD over Linn Creek carry?

About 1,630 vehicles per day (2022 count).

How long is Highland Acres RD over Linn Creek?

The structure is 103 ft (31.4 m) long with a longest span of 39 ft (11.9 m) and a deck 52 ft wide.

Who owns Highland Acres RD over Linn Creek?

It is owned by the County Highway Agency.