Rock County Bridge Report Card

Rock County scores 61 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

D61 / 100

Local infrastructure snapshot

Rock County, Nebraska

Rock County has 14 bridges in the National Bridge Inventory, with 1 rated poor and 2 rated scour-critical. Its poor-condition share of 7.1% is at or below the 7.5% statewide average. Poor-condition bridges carry about 35 daily vehicle crossings.

14Total Bridges

1Poor (7.1%)

5Fair (35.7%)

2Scour-Critical

Quote-Ready Local Facts

7.1%of county bridges are in poor condition, compared with 7.5% statewide and 6.7% nationally.

35daily vehicle crossings are on poor-condition bridges in the county.

2bridges are rated scour-critical, or 14.3% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Rock County a Bridge Condition Exposure Score of 61/100 (D). The county has 14 bridges in the National Bridge Inventory, including 1 in poor condition and 2 rated scour-critical. Poor-condition bridges carry about 35 daily vehicle crossings. Poor condition does not mean unsafe; bridges judged unsafe are closed or restricted by transportation agencies.

Download all county report-card scores as CSV.

How the Score Breaks Down

Factor	Weight	County Value	Penalty
Poor-condition bridge share	40	7.1%	14.3
Poor-condition traffic exposure	25	0.8% of measured traffic	0.6
Scour-critical bridge share	20	14.3%	20.0
Average age vs national baseline	10	57 years vs 48 nationally	3.8
Traffic-data completeness	5	4,370 measured daily crossings	0.0

Score = 100 minus weighted penalties. The score is a comparative research signal, not an official safety rating. Read the full methodology.

County Comparisons

County Poor-Condition Share	7.1%
State Poor-Condition Share	7.5%
National Poor-Condition Share	6.7%
County Scour-Critical Share	14.3%
Average Bridge Age	57 years
Poor-Condition Traffic Exposure	35 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeAspen Avenue over Niobrara River — 35 vehicles/day Oldest Listed BridgeAspen Avenue over Niobrara River — built in 1912 All County BridgesBrowse every bridge record in Rock County.

Top Bridges to Watch in Rock County

Bridge	Reason	Condition	Daily Traffic	Year Built
Aspen Avenue over Niobrara River	Poor condition + traffic exposure	Poor	35	1912
County Highway over Elkhorn River	Scour-critical foundation rating	Fair	10	1935
County Highway over Elkhorn River	Scour-critical foundation rating	Fair	5	1935
Us20/us183/n7 over Abandoned Rr	High traffic	Good	2,860	1938
N137 over N Br Elkhorn River	High traffic	Good	430	1973
N137 over Niobrara River	High traffic	Good	430	1974
N7 over Niobrara River	High traffic	Good	395	1982
449th AVE over Laughing Water Creek	High traffic	Good	45	2002
889th RD over Long Pine Creek	High traffic	Good	45	2020
County Highway over Skull Creek	High traffic	Fair	35	1969

Important safety note

Poor condition does not mean a bridge is unsafe. It means at least one major component has significant deterioration and the bridge is a priority for maintenance, repair, or replacement. Bridges judged unsafe are closed or restricted by transportation agencies.