US Bridges

X99 over Dry Branch Creek

Good

Des Moines County, Iowa · 070021700 · Structure no. 000000000023531

Built
2023
2 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
192 ft
3 main spans
Daily traffic
1,620
2023 count
Owner
County
County Highway Agency

About this bridge

X99 over Dry Branch Creek is a prestressed concrete stringer/multi-beam or girder carrying X99 over Dry Branch Creek in Des Moines County, Iowa. It was built in 2023, so it is 2 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,620 vehicles a day, projected to reach 1,620 by 2043. The structure is 192 ft (58.5 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesX99
CrossesDry Branch Creek
Location070021700
RouteCounty Highway 0
CountyDes Moines County
StateIowa
Coordinates40.85812, -91.10649
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation9: Superior to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating66.5 US tons
Inventory rating50 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length192 ft (58.5 m)
Longest span69 ft (21 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,620 (2023)
Projected traffic1,620 by 2043
Trucks0%
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$30,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was X99 over Dry Branch Creek built?

It was built in 2023, making it 2 years old in 2025.

What condition is X99 over Dry Branch 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 September 2023.

How much traffic does X99 over Dry Branch Creek carry?

About 1,620 vehicles per day (2023 count).

How long is X99 over Dry Branch Creek?

The structure is 192 ft (58.5 m) long with a longest span of 69 ft (21 m) and a deck 33 ft wide.

Who owns X99 over Dry Branch Creek?

It is owned by the County Highway Agency.