US Bridges

Evans ST over Ralston Creek

Poor

Johnson County, Iowa · 079061100 · Structure no. 000000000006500

Built
1911
114 years old, rebuilt 1992
Condition
Poor
inspected June 2023
Type
Culvert
Concrete
Length
21 ft
1 main span
Daily traffic
2,176
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Evans ST over Ralston Creek is a concrete culvert carrying Evans ST over Ralston Creek in Johnson County, Iowa. It was built in 1911 and reconstructed in 1992, so it is 114 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 2,176 vehicles a day, projected to reach 2,176 by 2043. The structure is 21 ft (6.4 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesEvans ST
CrossesRalston Creek
Location079061100
RouteCity Street 0
CountyJohnson County
StateIowa
Coordinates41.66199, -91.52072
Functional classUrban Local

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJune 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
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating25 US tons
Inventory rating18.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length21 ft (6.4 m)
Longest span20 ft (6.1 m)
Deck width42 ft (12.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,176 (2022)
Projected traffic2,176 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$275,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Evans ST over Ralston Creek built?

It was built in 1911, making it 114 years old in 2025. It was reconstructed in 1992.

What condition is Evans ST over Ralston 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 June 2023.

How much traffic does Evans ST over Ralston Creek carry?

About 2,176 vehicles per day (2022 count).

How long is Evans ST over Ralston Creek?

The structure is 21 ft (6.4 m) long with a longest span of 20 ft (6.1 m) and a deck 42 ft wide.

Who owns Evans ST over Ralston Creek?

It is owned by the City or Municipal Highway Agency.