| Interstate-95 over Route 10 | 1957 | 132,600 | Good |
| Interstate-95 over Richards Avenue | 1956 | 115,900 | Fair |
| US 202 & Route 67 over Housatonic River | 1953 | 23,800 | Fair |
| Route 8 Northbound over Laurel Hill Road | 1966 | 22,000 | Fair |
| US Route 44 Rte 1 over Still River | 1949 | 18,500 | Poor |
| Route 8 Northbound over Branch Brook | 1964 | 16,800 | Poor |
| Route 8 Northbound over Reynolds Bridge Road | 1964 | 16,800 | Fair |
| U.S. Route 6 over Pequabuck River | 1935 | 16,600 | Fair |
| U.S. Route 6 over Pequabuck River | 1986 | 16,600 | Fair |
| Route 8 Southbound over Branch Brook | 1964 | 16,200 | Fair |
| Route 8 Southbound over Reynolds Bridge Road | 1964 | 16,200 | Good |
| Scott Road over Interstate-84 | 2018 | 16,100 | Good |
| US Route 44 over Route 8 Northbound | 1970 | 16,000 | Fair |
| U.S. Route 202 over E Branch Naugatuck River | 1957 | 15,900 | Fair |
| U.S. Route 6 over Pequabuck River | 1957 | 15,700 | Fair |
| Fitch Hill Road over Interstate-395 | 1958 | 15,500 | Fair |
| Route 8 Northbound over Echo Lake Road | 1964 | 15,100 | Fair |
| Route 8 Northbound over Route 262 | 1964 | 15,100 | Fair |
| Route 73 over Steele Brook | 1994 | 14,100 | Fair |
| Route 8 Southbound over Echo Lake Road | 1964 | 14,100 | Fair |
| Route 8 Southbound over Route 262 | 1964 | 14,100 | Fair |
| Route 8 Northbound over Naugatuck River & R.R. | 1966 | 14,000 | Fair |
| Route 8 Southbound over Naugatuck River & R.R. | 1966 | 14,000 | Fair |
| U.S. Route 44 over Morgan Brook | 1947 | 13,900 | Fair |
| Route 8 Northbound over Kennedy Drive | 1967 | 13,700 | Fair |
| US Route 202 over Bakersville Brook | 1959 | 13,500 | Fair |
| Route 4 over Leadmine Brook | 1927 | 13,100 | Fair |
| US Route 202 over W Branch Naugatuck Rv | 1958 | 13,000 | Fair |
| Route 8 Northbound over Naugatuck River & RR | 1960 | 12,600 | Fair |
| Route 8 Northbound over Bogue Road | 1966 | 12,300 | Fair |
| Route 8 Northbound over Harwinton Avenue | 1966 | 12,300 | Fair |
| Route 8 Northbound over Hill Street | 1966 | 12,300 | Fair |
| Route 8 Northbound over Fenn Road | 1960 | 12,200 | Fair |
| Route 8 Northbound over U. S. Route 6 Eastbound | 1966 | 12,000 | Fair |
| Route 8 Northbound over Route 254 -waterbury Rd | 1966 | 11,900 | Fair |
| Route 8 Southbound over Naugatuck River & RR | 1960 | 11,900 | Fair |
| Route 8 Northbound over Campville Road | 1960 | 11,800 | Fair |
| Route 8 Northbound over Naugatuck Railroad Co. | 1966 | 11,800 | Fair |
| Route 8 Northbound over Naugatuck River & Access | 1966 | 11,800 | Fair |
| Route 8 Northbound over Route 222 -north Main St | 1966 | 11,800 | Fair |
| U.S. Route 6 over South Brook | 1973 | 11,700 | Good |
| Route 8 Southbound over Hill Street | 1966 | 11,600 | Fair |
| Route 8 Southbound over Bogue Road | 1966 | 11,500 | Fair |
| Route 8 Southbound over Fenn Road | 1960 | 11,500 | Fair |
| Route 8 Southbound over Route 254 - Waterbury Rd | 1966 | 11,200 | Fair |
| Route 8 Southbound over U.S. Route 6 Eastbound | 1966 | 11,200 | Fair |
| Route 4 over W Branch Naugatuck River | 1989 | 11,000 | Good |
| Route 8 Southbound over Campville Road | 1960 | 11,000 | Fair |
| U.S. Route 202 over Nepaug River | 1923 | 10,800 | Fair |
| Route 8 Southbound over Naugatuck Railroad Co. | 1966 | 10,700 | Fair |
| Route 8 Southbound over Naugatuck River & Access | 1966 | 10,700 | Fair |
| Route 8 Southbound over Route 222 -north Main St | 1966 | 10,700 | Fair |
| US Route 44 over Spruce Brook | 1941 | 10,700 | Fair |
| Route 4 over East Branch Naugatuck Rv | 1989 | 10,400 | Fair |
| SR 807 over Northfield Brook | 1956 | 10,400 | Fair |
| US Route 44 over Farmington River | 1958 | 10,200 | Fair |
| US Route 202 over Nepaug River | 2008 | 10,000 | Fair |
| US Route 202 over Nepaug River | 1989 | 10,000 | Fair |
| Route 8 Southbound over Harwinton Avenue | 1966 | 9,700 | Fair |
| Route 8 Southbound over Laurel Hill Road | 1966 | 9,700 | Fair |
| Route 8 Northbound over Graham Village Road | 1964 | 9,400 | Fair |
| Route 8 Northbound over Winthrop Street | 1964 | 9,400 | Fair |
| Route 8 Northbound over Route 222 - East Main St | 1966 | 9,300 | Fair |
| US Route 202 over East Aspetuck River | 1931 | 9,300 | Fair |
| Grove Street over Great Brook | 2010 | 9,100 | Good |
| Route 118 over Route 8 | 1966 | 9,000 | Fair |
| US Route 7 over Rocky River | 1988 | 9,000 | Good |
| Route 8 Southbound over Graham Village Road | 1964 | 8,800 | Fair |
| Route 8 Southbound over Route 222 - East Main St | 1966 | 8,800 | Fair |
| Route 8 Southbound over Winthrop Street | 1964 | 8,800 | Fair |
| U.S. Route 6 over Nonewaug River | 1928 | 8,700 | Fair |
| Route 4 over W Branch Leadmine Brook | 1959 | 8,500 | Good |
| Route 4 over W. Branch Leadmine Brook | 1959 | 8,500 | Fair |
| U.S. Route 6 over Steele Brook | 1957 | 8,500 | Fair |
| Route 222 over Naug. RR & Private Road | 1939 | 8,300 | Fair |
| Route 222 over Naugatuck River Overflow | 1958 | 8,300 | Fair |
| SR 800 (main St) over East Branch Naugatuck Rv | 1987 | 8,300 | Good |
| U.S. Route 6 over Branch Brook | 1939 | 8,300 | Fair |
| Grove Street over Housatonic River | 1977 | 7,900 | Poor |
| Route 222 over Naugatuck River | 1930 | 7,900 | Fair |
| East Albert Street over Naugatuck River | 1959 | 7,800 | Poor |
| US Route 202 over Bantam River | 2019 | 7,700 | Good |
| Still River Drive over Still River | 1993 | 7,600 | Fair |
| Route 64 over Old Sherman Hill Road | 1931 | 7,400 | Fair |
| US Route 202 over Gulf Stream | 1957 | 7,400 | Fair |
| US Route 44 over Wachocastinook Creek | 1951 | 7,400 | Poor |
| Route 8 Southbound over Kennedy Drive | 1967 | 7,300 | Fair |
| U.S. Route 202 over East Aspetuck River | 1931 | 7,300 | Fair |
| US Route 202 over Butternut Brook | 1988 | 7,200 | Fair |
| Route 4 over Ivy Mountain Brook | 1998 | 7,100 | Good |
| Route 67 over Great Brook | 2010 | 6,700 | Good |
| Route 181 over W Br Farmington River | 1939 | 6,600 | Fair |
| US Route 202 over East Aspetuck River | 1933 | 6,600 | Fair |
| US Route 7 over Morrisey Brook | 1989 | 6,600 | Good |
| Route 8 Northbound over Route 202 (east Main St) | 1964 | 6,500 | Fair |
| Route 8 Northbound over Route 4 (east Elm St.) | 1964 | 6,500 | Fair |
| Route 318 over Beaver Brook | 1937 | 6,300 | Fair |
| US Route 44 & Rte over Indian Meadow Brook | 1940 | 6,200 | Fair |
| US Route 7 over Eddys Cove | 1989 | 6,200 | Good |
| Route 317 over Pomperaug River | 1989 | 6,000 | Fair |
| Route 8 Southbound over Route 202 (east Main St) | 1964 | 6,000 | Fair |
| Route 8 Southbound over Route 4 (east Elm St.) | 1964 | 6,000 | Fair |
| US Route 7 over Blackberry River | 1989 | 6,000 | Good |
| Route 118 over Naugatuck River | 1959 | 5,900 | Fair |
| SR 800 over Gulf Stream | 1962 | 5,900 | Fair |
| Route 254 over Northfield Brook | 1970 | 5,800 | Good |
| Route 254 over Northfield Brook | 1970 | 5,800 | Good |
| Route 8 Southbound over Pinewoods Road | 1967 | 5,800 | Fair |
| Echo Lake Road #1 over Steele Brook | 1929 | 5,600 | Good |
| Route 262 over Naugatuck River | 1988 | 5,600 | Fair |
| Route 67 over Town Farm Brook | 1946 | 5,600 | Fair |
| U.S. Route 6 over East Meadow Brook | 2007 | 5,600 | Good |
| Route 118 over Bantam River | 1960 | 5,500 | Fair |
| Route 8 Northbound over Pinewoods Road | 1967 | 5,500 | Fair |
| SR 800 over Burr Pond Brook | 1996 | 5,500 | Good |
| Route 318 over Morgan Brook | 1947 | 5,400 | Fair |
| U.S. Route 202 over East Aspetuck River | 1931 | 5,400 | Fair |
| U.S. Route 44 over Wood Creek | 1927 | 5,400 | Fair |
| US Route 44 over Whiting River | 1949 | 5,400 | Fair |
| Church Street over W Br Naugatuck River | 1956 | 5,350 | Poor |
| Route 318 over Saville Dam Spillway | 1940 | 5,300 | Fair |
| US Route 44 over Mill Brook | 1934 | 5,200 | Fair |
| French Street over Steele Brook | 1983 | 5,199 | Fair |
| Farley Place over E Branch Naugatuck River | 1975 | 5,150 | Fair |
| Sunnyside Avenue over Turkey Brook | 2012 | 4,914 | Good |
| East Pearl Street over E Branch Naugatuck River | 1988 | 4,900 | Fair |
| US Route 202 over Gulf Stream | 1957 | 4,900 | Fair |
| US Route 202 over Shepaug River | 1957 | 4,800 | Poor |
| Route 254 over Northfield Brook | 1964 | 4,700 | Good |
| Route 67 over Jacks Brook | 1990 | 4,700 | Good |
| U.S. Route 44 over West Norfolk Brook | 2008 | 4,600 | Good |
| U.S. Route 6 over Nonewaug River | 1957 | 4,500 | Fair |
| US Route 44 over Housatonic River | 1990 | 4,500 | Good |
| Route 317 over Hesseky Brook | 1957 | 4,300 | Fair |
| US Route 44 over Spruce Swamp Creek | 1928 | 4,300 | Fair |
| Route 47 over Nonewaug River | 1956 | 4,200 | Fair |
| Route 47 over Shepaug River | 1950 | 4,200 | Fair |
| Wellsville Avenue over East Aspetuck River | 1937 | 4,179 | Fair |
| Route 118 over Spruce Brook | 1960 | 4,000 | Fair |
| Elm Street Ext. over Great Brook | 1996 | 3,973 | Fair |
| Route 118 over Naugatuck Railroad | 1963 | 3,900 | Fair |
| Route 67 over Second Hill Brook | 1958 | 3,900 | Fair |
| US Route 44 over Blackberry River | 1989 | 3,900 | Good |
| SR 800 over Mad River | 2022 | 3,800 | Good |
| US Route 7 & Rte 4 over Housatonic Rv RR Locl Rd | 1930 | 3,800 | Fair |
| Pinewoods Road over Still River | 2010 | 3,737 | Good |
| Boardman Road over Housatonic River | 1984 | 3,700 | Poor |
| Route 219 over Farmington River | 1959 | 3,700 | Fair |
| Route 61 over Nonnewaug River | 1989 | 3,700 | Good |
| Meadow Street over Highland Lake Outlet | 1940 | 3,420 | Fair |
| Nonnewaug Road over East Spring Brook | 1988 | 3,400 | Good |
| Route 219 over Nepaug River | 1988 | 3,400 | Good |
| Route 63 over Bantam River | 1942 | 3,400 | Fair |
| Route 72 over Marsh Brook | 2015 | 3,400 | Good |
| Route 8 over Brook | 1988 | 3,400 | Fair |
| Route 8 over Sandy Brook | 1988 | 3,400 | Good |
| US Route 7 over Housatonic Railroad | 1931 | 3,400 | Fair |
| US Route 7 over Housatonic River | 1931 | 3,400 | Good |
| Route 112 over Salmon Creek | 1958 | 3,300 | Fair |
| Route 63 over Hollenbeck River | 1960 | 3,300 | Good |
| Route 63 over Hollenbeck River | 1960 | 3,300 | Good |
| Housatonic Avenue over Aspetuck River | 1956 | 3,200 | Fair |
| Route 47 over Shepaug River | 1958 | 3,200 | Fair |
| Route 72 over Poland River | 1940 | 3,200 | Fair |
| US Route 7 over Housatonic River | 1991 | 3,200 | Good |
| Franklin Drive over E Branch Naugatuck River | 1961 | 3,180 | Fair |
| Route 20 over Still River | 1935 | 3,100 | Fair |
| Prospect Street over W Branch Naugatuck River | 1912 | 3,090 | Fair |
| Meadow Street over Mad River | 1956 | 3,010 | Poor |
| Route 47 over Sprain Brook | 1988 | 3,000 | Good |
| Route 47 over Weekeepeemee River | 1928 | 3,000 | Fair |
| Wellers Bridge Rd over Shepaug River | 1955 | 3,000 | Poor |
| Route 63 over Hollenbeck River | 1950 | 2,900 | Fair |
| US Route 7 over Cl&p Penstocks | 2008 | 2,900 | Fair |
| Franklin Street over E Br Naugatuck River | 1958 | 2,840 | Poor |
| North Main Street over Poland River | 2017 | 2,809 | Fair |
| Route 112 over Salmon Creek | 1930 | 2,800 | Fair |
| Route 4 over Baldwin Brook | 1996 | 2,800 | Fair |
| Route 4 over Bloody Brook | 2014 | 2,800 | Good |
| Wall Street over E Branch Naugatuck River | 1961 | 2,780 | Poor |
| Wall Street over E Branch Naugatuck River | 1961 | 2,780 | Fair |
| Canal Street over Pequabuck River | 2008 | 2,700 | Good |
| Route 63 over West Br. Bantam River | 1961 | 2,700 | Fair |
| Route 72 over Poland River | 1927 | 2,700 | Fair |
| Riverside Street over Steele Brook | 1992 | 2,686 | Good |
| Route 263 over Mad River | 1957 | 2,600 | Fair |
| Greenwoods Road over Route 8 | 1969 | 2,500 | Fair |
| Greystone Road #1 over Pan Am Railroad | 1960 | 2,500 | Fair |
| Route 109 over Wigwam Reservoir | 2019 | 2,500 | Good |
| Route 272 over Nickel Mine Brook | 1921 | 2,500 | Fair |
| SR 848 (waterbury over Naugatuck River & RR | 1928 | 2,500 | Fair |
| US Route 7 over Hollenbeck River | 1988 | 2,500 | Fair |
| Route 209 over Bantam River | 1935 | 2,400 | Fair |
| Forest Street over Abandoned Dot Railroad | 1915 | 2,387 | Fair |
| Route 109 over Mallory Brook | 1996 | 2,300 | Fair |
| Route 4 over Guinea Brook | 1934 | 2,300 | Fair |
| Route 47 over Sprain Brook | 1956 | 2,300 | Fair |
| Route 47 over Sprain Brook | 1988 | 2,300 | Good |
| US Route 7 over Bulls Canal | 1930 | 2,300 | Fair |
| Falls Avenue No. 2 over Turkey Brook | 2005 | 2,200 | Good |
| Route 263 over Highland Lake Outlet | 1957 | 2,200 | Fair |
| Route 4 over Guinea Brook | 1933 | 2,200 | Poor |
| Route 63 over Hollenbeck River | 1928 | 2,100 | Fair |
| U.S. Route 7 over Gunn Brook | 1924 | 2,100 | Fair |
| Case Avenue over Mad River | 1956 | 2,030 | Fair |
| Route 199 over Battle Swamp Brook | 1989 | 2,000 | Fair |
| Route 20 over Still River | 1953 | 2,000 | Fair |
| Route 219 over E Br Farmington River | 1929 | 2,000 | Fair |
| Route 272 over W.branch Naugatuck River | 1954 | 2,000 | Fair |
| Route 341 over Housatonic River | 1991 | 2,000 | Fair |
| Route 72 over Poland River | 1927 | 2,000 | Fair |
| Route 72 over Poland River | 1927 | 2,000 | Fair |
| SR 833(CLAYTON Rd) over Konkaput River | 1988 | 2,000 | Good |
| Wolcott Avenue over W Branch Naugatuck River | 1961 | 1,930 | Fair |
| Route 181 over Morgan Brook | 1957 | 1,900 | Fair |
| Route 47 over Bee Brook | 1959 | 1,900 | Fair |
| Route 47 over Bee Brook | 1959 | 1,900 | Fair |
| Route 47 over Shepaug River | 1929 | 1,900 | Good |
| Route 47 over Sprain Brook | 1989 | 1,900 | Fair |
| Wallens Street over Still River | 1955 | 1,860 | Poor |
| Palmer Bridge St over Naugatuck River | 1961 | 1,854 | Good |
| Newfield Road over E Br Naugatuck River | 1957 | 1,850 | Poor |
| King Hill Road over Indian Pond Creek | 1986 | 1,829 | Fair |
| Route 132 over Weekeepeemee River | 1934 | 1,700 | Fair |
| Route 20 over W Brnch Farmington River | 1940 | 1,700 | Fair |
| Route 272 over Norfolk Brook | 1972 | 1,700 | Good |
| Route 47 over Bee Brook | 1959 | 1,700 | Fair |
| Merryall Road over West Aspetuck River | 2004 | 1,665 | Good |
| Cedar Lane over Bakersville Brook | 1999 | 1,650 | Fair |
| Preston Road over Poland River | 1996 | 1,648 | Fair |
| Route 63 over Hollenbeck River O/flow | 1992 | 1,600 | Good |
| Greystone Road #1 over Greystone Pond | 1964 | 1,581 | Fair |
| Holabird Avenue over Still River | 2018 | 1,500 | Good |
| Route 126 over Flat Brook | 1965 | 1,500 | Fair |
| Route 341 over Housatonic Railroad | 1901 | 1,500 | Fair |
| Route 341 over Macedonia Brook | 2011 | 1,500 | Good |
| Route 45 over Sucker Brook | 1988 | 1,500 | Good |
| Bemis Street over Pequabuck River | 2004 | 1,442 | Good |
| US Route 7 over Carse Brook | 1989 | 1,400 | Good |
| Division Street over Mad River | 1956 | 1,364 | Fair |
| Aspetuck Ridge Rd over West Aspetuck River | 1981 | 1,323 | Good |
| Route 272 over Hall Meadow Brook | 1961 | 1,300 | Fair |
| Route 272 over Hart Brook | 1958 | 1,300 | Good |
| Route 272 over Spillway | 1961 | 1,300 | Fair |
| Route 272 over W Br Naugatuck River | 1957 | 1,300 | Fair |
| Route 341 over Bog Hollow Brook | 2011 | 1,300 | Good |
| Route 41 over Sages Ravine Brook | 1929 | 1,300 | Fair |
| New Street over Route 8 | 1969 | 1,270 | Fair |
| Aspetuck Ridge Rd over West Aspetuck River | 1990 | 1,254 | Fair |
| Papermill Road over East Aspetuck River | 1989 | 1,248 | Fair |
| Wells Road over East Aspetuck River | 1992 | 1,226 | Fair |
| Route 126 over Hollenbeck River | 1991 | 1,200 | Good |
| Route 132 over Weekeepeemee River | 1941 | 1,200 | Fair |
| Route 361 over Mudge Pond Brook | 1957 | 1,200 | Fair |
| Route 67 over Shepaug River | 1990 | 1,200 | Fair |
| Long Mountain RD#1 over West Aspetuck River | 2002 | 1,147 | Good |
| North Shore Road over Butternut Brook | 2016 | 1,108 | Good |
| Route 128 over Housatonic River | 1841 | 1,100 | Fair |
| Route 128 over Mill Brook | 1924 | 1,100 | Fair |
| Route 183 over Sandy Brook | 1958 | 1,100 | Fair |
| Route 272 over Hall Meadow Brook | 1988 | 1,100 | Fair |
| South Eagle Road over Pan Am Railroad | 1991 | 1,100 | Fair |
| New Street over Still River | 1970 | 1,080 | Fair |
| Camps Flat Road over Bull Mountain Brook | 1989 | 1,060 | Good |
| East West Hill Rd over Morgan Brook | 1930 | 1,045 | Fair |
| Route 222 over Leadmine Brook | 1960 | 1,000 | Fair |
| Route 222 over Naugatuck River | 1960 | 1,000 | Fair |
| Woolson Street over Steele Brook | 1929 | 1,000 | Good |
| West Street over Great Brook | 2002 | 963 | Good |
| Bogue Road #1 over Naugatuck River | 1956 | 952 | Good |
| River Road over Canoe Brook | 1956 | 951 | Fair |
| Route 272 over Hall Meadow Brook | 1987 | 950 | Good |
| Van Car Road over East Aspetuck River | 1957 | 908 | Poor |
| Wheaton Road over East Aspetuck River | 1985 | 908 | Poor |
| Route 222 over Naugatuck Railroad Co. | 1960 | 900 | Fair |
| Route 272 over Hall Meadow Brook | 2010 | 900 | Good |
| Route 272 over Hall Meadow Brook | 1998 | 900 | Fair |
| SR 827 (south Kent over Housatonic Railroad | 1935 | 900 | Good |
| South Street over Little Jacks Brook | 1930 | 898 | Fair |
| Route 181 over Beaver Brook | 1929 | 850 | Fair |
| Munro Street over Mad River | 1956 | 840 | Fair |
| Minortown Rd Conn over Nonewaug River | 1969 | 836 | Fair |
| Knife Shop Road over Northfield Pond Brook | 2007 | 800 | Good |
| Minor Bridge Road over Shepaug River | 1962 | 800 | Fair |
| Lovers Lane over Lovers Lane Brook | 1935 | 780 | Fair |
| Weed Road over Bantam River | 2007 | 780 | Good |
| Erickson Road over Housatonic Railroad | 1992 | 775 | Fair |
| Jacks Bridge Road over Weekeepeemee River | 1969 | 772 | Fair |
| Judson Avenue over Pomperaug River | 1969 | 765 | Fair |
| Old Turnpike North over Konkapot River | 2009 | 760 | Good |
| Sharon Station Rd over Webatuck Creek | 2000 | 713 | Good |
| Route 263 over E Branch Naugatuck River | 1935 | 700 | Poor |
| Wahnee Road over E Branch Naugatuck River | 1987 | 700 | Fair |
| Old Pumpkin Hill R over Housatonic Railroad | 1991 | 685 | Fair |
| 24 Bumper Road over Route 8 | 1966 | 680 | Poor |
| Cross Road over Still River | 1993 | 676 | Good |
| Sandy Brook Road over Sandy Brook | 1948 | 673 | Fair |
| Sandy Brook Road over Sandy Brook | 2023 | 670 | Good |
| Sharon Valley Rd over Indian Pond Creek | 1984 | 670 | Fair |
| Judd Road over Poland River | 1955 | 663 | Fair |
| Sandy Brook Road over Sandy Brook | 2013 | 662 | Good |
| Morgan Brook Road over Morgan Brook | 1957 | 660 | Fair |
| Plymouth Road over Rock Brook | 1997 | 657 | Good |
| Merryall Road over West Aspetuck River | 1937 | 655 | Poor |
| Stillwater Pond Rd over W Branch Naugatuck River | 1960 | 655 | Fair |
| Aspetuck Ridge Rd over Merryall Brook | 2014 | 645 | Good |
| Selleck Hill Road over Wachocastinook Brook | 2002 | 645 | Good |
| Cedar Hill Road over Morrissey Brook | 2003 | 644 | Good |
| Lower Road over Blackberry River | 1938 | 628 | Fair |
| West Hyerdale Dr over Marshepaug River | 1970 | 627 | Fair |
| Chapel Hill Road over West Aspetuck River | 1975 | 625 | Fair |
| Squire Hill Road over West Aspetuck River | 1956 | 625 | Poor |
| Ssr 478 over East Aspetuck River | 1988 | 600 | Fair |
| Crane Hollow Rd #3 over Weekeepeemee River | 1988 | 595 | Good |
| East Street South over Bantam River | 1956 | 585 | Fair |
| Salmon Kill Road over Salmon Creek | 2002 | 570 | Good |
| West Road over E. Branch Naugatuck Rv. | 2017 | 570 | Good |
| Maple Hollow Road over Nepaug River | 1955 | 560 | Fair |
| Napco Drive over Pequabuck River | 2024 | 550 | Good |
| Route 183 over Sandy Brook | 1958 | 550 | Good |
| SR 478(N Shore Rd) over Sucker Brook | 1957 | 550 | Good |
| SR 832 over Housatonic Railroad | 1938 | 550 | Fair |
| Upland Road over East Aspetuck River | 2023 | 547 | Good |
| Woodward Road over East Morris Brook | 1997 | 546 | Good |
| Maple Hollow Road over North Nepaug River | 1987 | 540 | Good |
| Newfield Road over E Branch Naugatuck River | 1935 | 535 | Fair |
| Mill Street over Great Brook | 2018 | 530 | Good |
| Northfield Road over Naugatuck River | 2011 | 530 | Good |
| Marsh Road over Bristol Reservoir Spl | 1940 | 523 | Fair |
| Belleview Avenue over Gulf Stream | 1910 | 520 | Fair |
| Whites Woods Rd #1 over Bantam River | 2017 | 520 | Good |
| River Road over Little Jacks Brook | 1934 | 518 | Good |
| Sand Road over West Aspetuck River | 1983 | 516 | Poor |
| West Morris Road over Bantam River | 1940 | 515 | Fair |
| Bulls Bridge Road over Spooner Dam Overflow | 1991 | 506 | Fair |
| Bulls Bridge Road over Power Station Canal | 1991 | 500 | Good |
| Campville Road over Naugatuck Railroad Co. | 1955 | 500 | Good |
| Ssr 485 over Nickel Mine Brook | 1957 | 500 | Fair |
| Blackberry Street over Blackberry River | 1937 | 498 | Good |
| Gallivan Lane over Interstate-395 | 1958 | 498 | Fair |
| Hazel Plain Road over Sprain Brook | 2019 | 477 | Good |
| Milton Road over Marshepaug River | 1940 | 477 | Good |
| College Hill Road over Whiting River | 1999 | 448 | Fair |
| South Road over Rock Brook | 1985 | 446 | Fair |
| North Shore Road over Bantam River | 1980 | 444 | Good |
| Gillette Road over Torringford Brook | 1956 | 420 | Good |
| White Street over Still River | 1956 | 410 | Poor |
| Winchester Road over Bakersville Brook | 1955 | 410 | Fair |
| Farnum Road over Salmon Creek | 2001 | 408 | Fair |
| Sodom Road over Konkapot River | 1956 | 408 | Fair |
| Bulls Bridge Road over Housatonic River | 1842 | 400 | Fair |
| River Road over Guinea Brook | 1986 | 400 | Fair |
| Route 43 over Bradford Brook | 1989 | 400 | Fair |
| Route 43 over Hollenbeck River | 1989 | 400 | Good |
| Beech Hill Road over Sandy Brook | 2000 | 397 | Fair |
| Skilton Road over Nonewaug River | 1860 | 394 | Good |
| Romford Road over Shepaug River | 2018 | 393 | Good |
| Wood Creek Road over Weekeepeemee River | 1956 | 393 | Good |
| Pothier Road over Nickel Mine Brook | 1910 | 390 | Fair |
| South Road over Leadmine Brook | 1999 | 390 | Fair |
| Romford Road over Bantam River | 1910 | 380 | Fair |
| Sucker Brook Road over Sucker Brook Spillway | 1966 | 380 | Fair |
| Allyndale Road over Konkapot River | 1982 | 378 | Good |
| Cobble Road over Hollenbeck River | 1956 | 378 | Poor |
| Old Creamery Road over Still River | 1930 | 338 | Fair |
| Locust Road over Rock Brook | 1967 | 319 | Poor |
| Macedonia Brook Rd over Macedonia Brook | 1948 | 318 | Fair |
| Mill Road over Nonewaug River | 1900 | 318 | Fair |
| Milton Road #2 over Marshepaug River | 2020 | 318 | Good |
| Bridge Street over Mad River | 1956 | 310 | Poor |
| Park Avenue over Gulf Stream | 1960 | 290 | Fair |
| Water Street over Housatonic River | 2016 | 286 | Good |
| Steele Road over Nepaug River | 1955 | 280 | Fair |
| Day Road over Beaver Brook | 1956 | 270 | Fair |
| Dings Road over Nepaug River | 1956 | 270 | Good |
| Steele Road over Brook | 1957 | 270 | Fair |
| River Road over Mill Brook | 1987 | 265 | Fair |
| Wewaka Brook Road over Wewaka Brook | 1933 | 265 | Fair |
| Tunnel Road over Shepaug River | 1956 | 263 | Good |
| Tobey Hill Road over Whiting River | 2021 | 257 | Good |
| Emmons Lane over Whiting River | 2009 | 255 | Good |
| Magnolia Hill Road over East Spring Brook | 1955 | 255 | Good |
| Nonnewaug Road over East Spring Brook | 2021 | 253 | Good |
| Smokey Hollow Road over Bantam River | 1956 | 252 | Good |
| Westside Road over Blackberry River | 1940 | 252 | Good |
| Findley Road over East Aspetuck River | 1956 | 250 | Fair |
| Stoddard Road over Bantam River | 2004 | 250 | Good |
| E Litchfield Rd #2 over Spruce Brook | 1956 | 244 | Good |
| Under Mountain Roa over Wangum Lake Brook | 1956 | 238 | Fair |
| Popple Swamp Road over Furnace Brook | 1994 | 227 | Good |
| Pomperaug Road over Pomperaug River | 1956 | 216 | Fair |
| Skipper Avenue over Turkey Brook | 2005 | 212 | Good |
| West Side Road over West Side Pond Brook | 1955 | 211 | Good |
| Mountain Road over Spaulding Brook | 1955 | 209 | Poor |
| Wilton Road over Wilton Pond | 1998 | 206 | Fair |
| West Morris Road over Bantam River | 1956 | 200 | Poor |
| Pie Hill Road over Bantam River | 1950 | 196 | Fair |
| Ford Hill Road over Hollenbeck River | 1955 | 194 | Good |
| Wilson Road over Gulf Stream | 2001 | 190 | Good |
| Valley Road over Birdseye Brook | 1987 | 189 | Fair |
| Walker Brook RD#3 over Walker Brook | 2001 | 188 | Good |
| Blue Swamp Road over W Branch Shepaug River | 2014 | 186 | Good |
| Wheeler Road over Spruce Brook | 1956 | 186 | Good |
| Saw Mill Road over Marshepaug River | 1955 | 184 | Good |
| Catlin Road over Lake Harwinton Dam | 2009 | 174 | Good |
| Cobble Road over Cobble Brook | 2011 | 161 | Good |
| Old Grassy Hill Rd over Good Hill Brook | 1970 | 150 | Good |
| Rugg Brook Road over Mad River | 1956 | 140 | Fair |
| Hemlock Road over Clapboard Oak Brook | 1950 | 136 | Fair |
| Church Street over East Aspetuck River | 1986 | 135 | Fair |
| Grantville Road over Mad River | 1956 | 135 | Poor |
| Wolfords Hill Road over Sandy Brook | 2005 | 133 | Fair |
| Dibble Hill Road over Mill Brook | 1970 | 131 | Good |
| Judds Bridge Road over Lenevig Brook | 1956 | 129 | Fair |
| Chohees Trail over Weekeepeemee River | 1969 | 126 | Fair |
| Canaan Mountain Rd over Wangum Lake Brook | 1988 | 125 | Fair |
| Carter Road over Kent Falls Brook | 2017 | 125 | Good |
| Trumbull Street over Bantam River | 1986 | 125 | Good |
| Mcclave Road over North Brook | 2002 | 122 | Fair |
| Black Bridge Road over W Br Farmington River | 1999 | 120 | Fair |
| Whittlesey Road over Shepaug River | 1991 | 120 | Good |
| Ashpohtag Road over North Brook | 1979 | 117 | Good |
| Bunnell Street over Loon Brook | 2010 | 110 | Fair |
| Riverview Road over Bull Mountain Brook | 2018 | 106 | Good |
| South Road over Still River | 1984 | 106 | Poor |
| West Woods Rd NO.2 over Guinea Brook | 2016 | 106 | Good |
| Campbell Road over Sandy Brook | 2015 | 100 | Fair |
| Lower River Rd #1 over Mill Brook | 2012 | 100 | Good |
| River Place over Blackberry River | 1957 | 100 | Poor |
| Shear Shop Road over Mashepaug River | 2008 | 100 | Good |
| Falls Road over Nonnewaug Brook | 1956 | 95 | Poor |
| Swimming Hole Rd over Leadmine Brook | 1989 | 85 | Fair |
| Old Forge Road over Sandy Brook | 1996 | 80 | Fair |
| Riga Lane over Wachocastinook Brook | 1957 | 80 | Fair |
| Sand Pit Road over East Aspetuck River | 1957 | 78 | Fair |
| Smith Road over Hall Meadow Brook | 1999 | 77 | Poor |
| Cemetery Road over Sucker Brook | 1998 | 76 | Fair |
| Waller Road over Bull Mountain Brook | 1998 | 74 | Good |
| Eli Bunker Road over E. Branch Shepaug River | 1965 | 68 | Fair |
| State Line Hill Rd over Sandy Brook | 1956 | 67 | Fair |
| Duck Pond Road over Butternut Brook | 1992 | 66 | Fair |
| Schoolhouse Road over Center Brook | 1957 | 66 | Fair |
| Niles Road over Cedar Swamp Brook | 1956 | 65 | Fair |
| High Bridge Road over Bantam River | 2008 | 64 | Good |
| Shingle Mill Road over Rock Brook | 2019 | 64 | Good |
| Old Mill Road over East Aspetuck River | 2001 | 63 | Good |
| Old Rte 254-lower over Northfield Brook | 1936 | 60 | Fair |
| Old Rte 254-upper over Northfield Brook | 1955 | 60 | Good |
| Dugan Road over Kent Falls Brook | 1954 | 54 | Fair |
| Flat Rocks Road over W Branch Shepaug River | 2017 | 54 | Good |
| Old Goshen Road over Hall Meadow Brook | 1956 | 52 | Poor |
| Minor Road over Leadmine Brook | 1939 | 50 | Fair |
| Sunny Lane over Turkey Brook | 2005 | 50 | Good |
| Basin Main Road over Mad River | 1940 | 42 | Fair |
| Basin Main Road over Mad River | 1940 | 42 | Fair |
| Access Road over Thomaston Spillway Chann | 1960 | 40 | Fair |
| Gray Road over North Brook | 1956 | 40 | Good |
| Judds Bridge Road over Shepaug River | 1987 | 34 | Fair |
| Lower Barrack Road over Flat Brook | 1956 | 31 | Fair |
| Tunnel Road over Kirby Brook | 1956 | 31 | Good |
| Walnut Hill Rd #2 over Northfield Brook | 1946 | 30 | Fair |
| Smith Place over Mill Brook | 1955 | 25 | Good |
| Mud Pond Road over Bull Mountain Brook | 2022 | 21 | Good |
| Kirby Brook Road over Kirby Brook | 1956 | 20 | Fair |
| Maddox Road #1 over East Spring Brook | 1956 | 20 | Poor |
| Main Park Road over Hall Meadow Brook | 1970 | 20 | Fair |
| West Mountain Road over Sprain Brook | 1994 | 20 | Fair |
| Greystone Road Ext over Todd-hollow & Hancock | 1998 | 12 | Good |
| Old Northfield Rd over Branch Brook | 1950 | 4 | Good |
| Main Park Road over E.branch Naugatuck River | 1969 | 1 | Good |