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Bridge conditions in Penobscot County, Maine

317 inventoried bridges · 60 rated poor · 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

Penobscot County has 60 bridges rated poor out of 317 inventoried, a 18.9% share that puts it well above the national rate of about 7%.

60 of the 317 bridges in Penobscot County, Maine, are rated in poor condition (18.9%) in the 2025 National Bridge Inventory, as of August 20, 2026.
64 bridges (20.2%) are rated good and 193 (60.9%) fair.
The median Penobscot County bridge was built in 1966.
The busiest poor-rated bridge is I 95 over Route 15 (broadway) (built 1960), carrying about 25,340 vehicles a day.

Good 20.2% · Fair 60.9% · Poor 18.9% of 317 bridges

Bridges rated poor

Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.

Bridge	Built	Vehicles/day	Condition
I 95 over Route 15 (broadway)	1960	25,340	Poor
I 95 SB over Stillwater Avenue	1960	25,150	Poor
I 95 NB over Stillwater Avenue	1960	25,120	Poor
Independent St over Kenduskeag Stream	1929	11,561	Poor
Parkway S over I-395	1985	10,212	Poor
Hogan Rd over Interstate 95 NB & SB	1960	8,606	Poor
US Hwy 202 over Mcrr	1965	8,412	Poor
State St over Kenduskeag Stream	1976	8,231	Poor
I 95 NB over Pushaw Stream	1965	6,360	Poor
US Hwy 202 over Souadabscook Str	1965	6,229	Poor
US Hwy 202 over Souadabscook Stream	1965	5,958	Poor
I 95 SB over N Howland Rd	1966	4,120	Poor
Main Rd over High Water Chan Pen Riv	1938	3,923	Poor
Main Rd over Harvey Brook	1923	3,510	Poor
I 95 SB over Main Rd & Penobscot R.	1966	3,270	Poor
I 95 SB over Rt 116 (pattagumpus Rd)	1966	3,270	Poor
I 95 NB over Rt 116 (pattagumpus Rd)	1966	3,160	Poor
I 95 NB over Main Rd & Penobscot R.	1966	3,160	Poor
Kenduskeag Avenue over Interstate 95 NB & SB	1960	3,020	Poor
Lagrange Rd over I-95 NB & SB	1965	2,967	Poor
Ramp on From US202 over Interstate 395	1964	2,757	Poor
Chase Rd over Interstate 95 NB & SB	1960	1,920	Poor
Forest Av over Interstate 95 NB & SB	1961	1,706	Poor
Granite St over Millinocket Stream	1937	1,548	Poor
Ridge Rd over Martin Stream	1959	1,532	Poor
Robertson Blvd over I-395	1985	1,281	Poor
Medway Rd over Salmon Stream	1939	882	Poor
State St over Millinocket Stream	1950	697	Poor
Lake Road over Black Stream (overflow)	1986	677	Poor
Storer Rd over W. Br. Dead Stream	1940	634	Poor
Bullen St over Otter Brook	1947	616	Poor
Fuller Rd over Harvey Brook	1963	600	Poor
N Howland Rd over Mile Brook	1977	584	Poor
Averill Rd over Mattagodus Stream	1948	390	Poor
Military Rd over Olamon Stream	1925	322	Poor
Route 116 over Hoyt Brook	1953	267	Poor
Edinburg Rd over Hemlock Stream	1940	267	Poor
Island Av over Penobscot River Overflow	1902	177	Poor
Island Avenue over Penobscot River Overflow	1902	158	Poor
Pullen Rd over Kenduskeag Stream	2012	154	Poor
Center St over Mattawamkeag River	1928	123	Poor
Tucker Ridge Rd over Mattagodus Stream	1941	72	Poor
Crane Rd over W Br Kenduskeag	1935	71	Poor
Manning Mill Rd over Souadabscook Str	1996	62	Poor
Millet Rd over Kenduskeag Stream	2001	54	Poor
Jordan Mills Rd over Mattaseunk Stream	1923	41	Poor
Bia Route 1530 over Johnny Ayres Brook	2012	30	Poor
Grist Mill Rd over Souadabscook Strm	1970	22	Poor
Bia Route 440 over Sam Ayers Stream	1998	20	Poor
Bia Route 449 over E Branch Seboeis Stream	2003	20	Poor
Bia Route 421 over E Br Passadumkeag River	2007	20	Poor
American Thread Rd over Unnamed Brook	2000	20	Poor
Bia Rte 1531 over Mattamiscontis Stream	2004	15	Poor
Swift Brook Road over Sandbank Stream	2000	10	Poor
Sherman Lumber Com over Seboeis River	2000	10	Poor
Orin Falls Road over Katahdin Brook	2000	5	Poor
Swift Brook Road over Swift Brook	2000	2	Poor
Swift Brook Road over East Branch of Penobscot	2000	2	Poor
East Branch Road over Unnamed Stream	2000	2	Poor
East Branch Road over Big Spring Brook	2000	2	Poor

Busiest bridges in the county

Bridge	Built	Vehicles/day	Condition
I 95 over Route 15 (broadway)	1960	25,340	Poor
I 95 over Kenduskeag Str&valley Av	1960	25,340	Fair
I 95 SB over Stillwater Avenue	1960	25,150	Poor
I 95 NB over Stillwater Avenue	1960	25,120	Poor
Penob River Br over Penobscot R & RR Yard	1997	24,636	Fair
I 95 SB over Industrial Spur (I-395)	1960	23,160	Fair
Wilson St over Mcrr	1984	21,221	Fair
I 395 EB over Webster Avenue	2016	18,710	Good
Union St over Griffin Brook	1956	16,810	Fair
Stillwater Av over S Chan Stillwater River	1952	16,728	Fair

Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.

Every bridge in Penobscot County → - all 317, busiest first, each with its own condition record.

All of Maine: Maine bridge conditions by county · every download on the data page.

Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.