US Bridges

Y30 20th Ave over Trib to Mud Creek

Good

Scott County, Iowa · 080E13302 · Structure no. 000000000303171

Built
2021
4 years old
Condition
Good
inspected April 2024
Type
Slab
Concrete Continuous
Length
73 ft
3 main spans
Daily traffic
460
2018 count
Owner
County
County Highway Agency

About this bridge

Y30 20th Ave over Trib to Mud Creek is a concrete continuous slab carrying Y30 20th Ave over Trib to Mud Creek in Scott County, Iowa. It was built in 2021, so it is 4 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 460 vehicles a day, roughly 14% of them trucks, projected to reach 460 by 2044. The structure is 73 ft (22.3 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesY30 20th Ave
CrossesTrib to Mud Creek
Location080E13302
RouteCounty Highway 0
CountyScott County
StateIowa
Coordinates41.69589, -90.86001
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.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating45.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length73 ft (22.3 m)
Longest span28 ft (8.5 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic460 (2018)
Projected traffic460 by 2044
Trucks14%
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Y30 20th Ave over Trib to Mud Creek built?

It was built in 2021, making it 4 years old in 2025.

What condition is Y30 20th Ave over Trib to 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 April 2024.

How much traffic does Y30 20th Ave over Trib to Mud Creek carry?

About 460 vehicles per day (2018 count), of which roughly 14% are trucks.

How long is Y30 20th Ave over Trib to Mud Creek?

The structure is 73 ft (22.3 m) long with a longest span of 28 ft (8.5 m) and a deck 33 ft wide.

Who owns Y30 20th Ave over Trib to Mud Creek?

It is owned by the County Highway Agency.