US Bridges

D15 190th ST over Boyer River

Poor

Sac County, Iowa · 0893722 · Structure no. 000000000301810

Built
1964
61 years old
Condition
Poor
inspected August 2024
Type
Slab
Concrete Continuous
Length
103 ft
3 main spans
Daily traffic
280
2023 count
Owner
County
County Highway Agency

About this bridge

D15 190th ST over Boyer River is a concrete continuous slab carrying D15 190th ST over Boyer River in Sac County, Iowa. It was built in 1964, so it is 61 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 280 vehicles a day, roughly 43% of them trucks, projected to reach 280 by 2044. The structure is 103 ft (31.4 m) long and 30 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesD15 190th ST
CrossesBoyer River
Location0893722
RouteCounty Highway 0
CountySac County
StateIowa
Coordinates42.5182, -95.203
Functional classRural Major Collector

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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
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
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating55.1 US tons
Inventory rating33.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length103 ft (31.4 m)
Longest span39 ft (11.9 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic280 (2023)
Projected traffic280 by 2044
Trucks43%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was D15 190th ST over Boyer River built?

It was built in 1964, making it 61 years old in 2025.

What condition is D15 190th ST over Boyer River 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 August 2024.

How much traffic does D15 190th ST over Boyer River carry?

About 280 vehicles per day (2023 count), of which roughly 43% are trucks.

How long is D15 190th ST over Boyer River?

The structure is 103 ft (31.4 m) long with a longest span of 39 ft (11.9 m) and a deck 30 ft wide.

Who owns D15 190th ST over Boyer River?

It is owned by the County Highway Agency.