Kalkaska County Bridge Report Card

Kalkaska County scores 86 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

B86 / 100

Local infrastructure snapshot

Kalkaska County, Michigan

Kalkaska County has 15 bridges in the National Bridge Inventory, with 1 rated poor and 0 rated scour-critical. Its poor-condition share of 6.7% is at or below the 11.0% statewide average. Poor-condition bridges carry about 19 daily vehicle crossings.

15Total Bridges

1Poor (6.7%)

7Fair (46.7%)

0Scour-Critical

Quote-Ready Local Facts

6.7%of county bridges are in poor condition, compared with 11.0% statewide and 6.7% nationally.

19daily vehicle crossings are on poor-condition bridges in the county.

0bridges are rated scour-critical, or 0.0% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Kalkaska County a Bridge Condition Exposure Score of 86/100 (B). The county has 15 bridges in the National Bridge Inventory, including 1 in poor condition and 0 rated scour-critical. Poor-condition bridges carry about 19 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	6.7%	13.3
Poor-condition traffic exposure	25	0.1% of measured traffic	0.1
Scour-critical bridge share	20	0.0%	0.0
Average age vs national baseline	10	50 years vs 48 nationally	0.9
Traffic-data completeness	5	20,845 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	6.7%
State Poor-Condition Share	11.0%
National Poor-Condition Share	6.7%
County Scour-Critical Share	0.0%
Average Bridge Age	50 years
Poor-Condition Traffic Exposure	19 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeKniss Road over North Br Manistee River — 19 vehicles/day Oldest Listed BridgeKniss Road over North Br Manistee River — built in 1910 All County BridgesBrowse every bridge record in Kalkaska County.

Top Bridges to Watch in Kalkaska County

Bridge	Reason	Condition	Daily Traffic	Year Built
Kniss Road over North Br Manistee River	Poor condition + traffic exposure	Poor	19	1910
Us-131\|m-66\|m-72\|s over N Br Boardman River	High traffic	Fair	8,567	1940
N Rapid City Road over Rapid River	High traffic	Good	5,800	1983
Boardman Road over Boardman River	High traffic	Fair	1,700	1988
Aarwood Road over Rapid River	High traffic	Good	1,340	2012
M-66 over Manistee River	High traffic	Fair	1,150	1979
W Sharon Road over Manistee River	High traffic	Good	1,060	1958
N Sharon Road over Manistee River	High traffic	Fair	330	1971
Coster Road over Manistee River	High traffic	Fair	290	1977
N Sharon Rd/co 571 over North Br Manistee River	High traffic	Good	150	2002

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.