Penobscot County Bridge Report Card

Penobscot County scores 38 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

F38 / 100

Local infrastructure snapshot

Penobscot County, Maine

Penobscot County has 317 bridges in the National Bridge Inventory, with 60 rated poor and 18 rated scour-critical. Its poor-condition share of 18.9% is above the 15.4% statewide average. Poor-condition bridges carry about 189,351 daily vehicle crossings.

317Total Bridges

60Poor (18.9%)

193Fair (60.9%)

18Scour-Critical

Quote-Ready Local Facts

18.9%of county bridges are in poor condition, compared with 15.4% statewide and 6.7% nationally.

189,351daily vehicle crossings are on poor-condition bridges in the county.

18bridges are rated scour-critical, or 5.7% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Penobscot County a Bridge Condition Exposure Score of 38/100 (F). The county has 317 bridges in the National Bridge Inventory, including 60 in poor condition and 18 rated scour-critical. Poor-condition bridges carry about 189,351 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	18.9%	37.9
Poor-condition traffic exposure	25	15.4% of measured traffic	11.6
Scour-critical bridge share	20	5.7%	11.4
Average age vs national baseline	10	51 years vs 48 nationally	1.4
Traffic-data completeness	5	1,228,249 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	18.9%
State Poor-Condition Share	15.4%
National Poor-Condition Share	6.7%
County Scour-Critical Share	5.7%
Average Bridge Age	51 years
Poor-Condition Traffic Exposure	189,351 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeI 95 over Route 15 (broadway) — 25,340 vehicles/day Oldest Listed BridgeCovered Bridge RD over Kenduskeag Stream — built in 1876 All County BridgesBrowse every bridge record in Penobscot County.

Top Bridges to Watch in Penobscot County

Bridge	Reason	Condition	Daily Traffic	Year Built
Granite ST over Millinocket Stream	Poor condition + traffic exposure	Poor	1,548	1937
Island Av over Penobscot River Overflow	Poor condition + traffic exposure	Poor	177	1902
Island Avenue over Penobscot River Overflow	Poor condition + traffic exposure	Poor	158	1902
Crane RD over W Br Kenduskeag	Poor condition + traffic exposure	Poor	71	1935
Millet RD over Kenduskeag Stream	Poor condition + traffic exposure	Poor	54	2001
Jordan Mills RD over Mattaseunk Stream	Poor condition + traffic exposure	Poor	41	1923
East Branch Road over Big Spring Brook	Poor condition + traffic exposure	Poor	2	2000
I 95 over Route 15 (broadway)	Poor condition + traffic exposure	Poor	25,340	1960
I 95 SB over Stillwater Avenue	Poor condition + traffic exposure	Poor	25,150	1960
I 95 NB over Stillwater Avenue	Poor condition + traffic exposure	Poor	25,120	1960

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.