Mercer County Bridge Report Card

Mercer County scores 75 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

C75 / 100

Local infrastructure snapshot

Mercer County, North Dakota

Mercer County has 71 bridges in the National Bridge Inventory, with 4 rated poor and 4 rated scour-critical. Its poor-condition share of 5.6% is at or below the 11.1% statewide average. Poor-condition bridges carry about 1,056 daily vehicle crossings.

71Total Bridges

4Poor (5.6%)

43Fair (60.6%)

4Scour-Critical

Quote-Ready Local Facts

5.6%of county bridges are in poor condition, compared with 11.1% statewide and 6.7% nationally.

1,056daily vehicle crossings are on poor-condition bridges in the county.

4bridges are rated scour-critical, or 5.6% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Mercer County a Bridge Condition Exposure Score of 75/100 (C). The county has 71 bridges in the National Bridge Inventory, including 4 in poor condition and 4 rated scour-critical. Poor-condition bridges carry about 1,056 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	5.6%	11.3
Poor-condition traffic exposure	25	3.1% of measured traffic	2.4
Scour-critical bridge share	20	5.6%	11.3
Average age vs national baseline	10	49 years vs 48 nationally	0.4
Traffic-data completeness	5	33,624 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	5.6%
State Poor-Condition Share	11.1%
National Poor-Condition Share	6.7%
County Scour-Critical Share	5.6%
Average Bridge Age	49 years
Poor-Condition Traffic Exposure	1,056 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeNd Highway 200 over Branch Of Raymond Creek — 780 vehicles/day Oldest Listed Bridge5th ST SW over Knife River — built in 1917 All County BridgesBrowse every bridge record in Mercer County.

Top Bridges to Watch in Mercer County

Bridge	Reason	Condition	Daily Traffic	Year Built
Nd Highway 200 over Branch Of Raymond Creek	Poor condition + traffic exposure	Poor	780	1950
IRR BIA RTE 22 over Trib To Red Butte Bay	Poor condition + traffic exposure	Poor	200	1960
Cr20 over Brady Creek	Poor condition + traffic exposure	Poor	50	1984
65th AVE SW over Spring Creek	Poor condition + traffic exposure	Poor	26	1969
Nd Highway 200 over Knife River	Scour-critical foundation rating	Fair	790	1950
3rd AVE SW over Antelope Creek	Scour-critical foundation rating	Fair	270	1979
73rd AVE SW (cr2) over Creek	Scour-critical foundation rating	Fair	20	1935
55th Avenue SW over Antelope Creek	Scour-critical foundation rating	Fair	10	1979
Nd Highway 49 over Creek	High traffic	Fair	3,730	1967
Nd Highway 49 over Knife River	High traffic	Good	3,400	2016

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.