Bridge conditions in Penobscot County, Maine
317 inventoried bridges · 60 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
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 .
- 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.
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.