US Bridges

County Road Dd over Prairie Creek

PoorPosted for load

Merrick County, Nebraska · 2.6E 2.3N Silver Creek · Structure no. C006100805

Built
1941
84 years old
Condition
Poor
inspected May 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
89 ft
3 main spans
Daily traffic
15
2003 count
Owner
County
County Highway Agency

About this bridge

County Road Dd over Prairie Creek is a wood or timber stringer/multi-beam or girder carrying County Road Dd over Prairie Creek in Merrick County, Nebraska. It was built in 1941, so it is 84 years old, older than the Nebraska average of 47.1 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. Its operating status is: posted for load restriction.

It carries about 15 vehicles a day, projected to reach 25 by 2035. The structure is 89 ft (27.1 m) long and 20 ft wide. If it were closed, the detour would be 31.1 mi (50 km).

Location

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CarriesCounty Road Dd
CrossesPrairie Creek
Location2.6E 2.3N Silver Creek
RouteCounty Highway 8
CountyMerrick County
StateNebraska
Coordinates41.3519, -97.6095
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating12.1 US tons
Inventory rating6.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckCorrugated steel
Main spans3
Design loadHS 20
Structure length89 ft (27.1 m)
Longest span29 ft (8.8 m)
Deck width20 ft (6.2 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2003)
Projected traffic25 by 2035
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.1 mi (50 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 County Road Dd over Prairie Creek built?

It was built in 1941, making it 84 years old in 2025.

What condition is County Road Dd over Prairie 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 May 2024.

How much traffic does County Road Dd over Prairie Creek carry?

About 15 vehicles per day (2003 count).

How long is County Road Dd over Prairie Creek?

The structure is 89 ft (27.1 m) long with a longest span of 29 ft (8.8 m) and a deck 20 ft wide.

Who owns County Road Dd over Prairie Creek?

It is owned by the County Highway Agency.