| Rising Sun Lane over Brandywine Creek | New Castle | 1900 | 1995 | Masonry | 2,103 | Fair |
| Augustine Cutoff over Brandywine Creek | New Castle | 1900 | 1980 | Steel Continuous | 9,627 | Fair |
| Lancaster Pk/sr48 over Csx Railroad | New Castle | 1900 | 1978 | Steel | 23,743 | Good |
| Fourth ST over Csx Railroad | New Castle | 1900 | 1979 | Steel | 99 | Fair |
| Lovering AVE over Pedestrian Path | New Castle | 1900 | | Concrete | 9,804 | Fair |
| S.w. Front ST over Mispillion River | Kent | 1900 | | Concrete Continuous | 99 | Fair |
| Vanburen Street over Brandywine Creek&flume | New Castle | 1906 | 1998 | Prestressed Concrete | 99 | Fair |
| Market ST / Us13 B over Shellpot Creek | New Castle | 1910 | 1995 | Concrete | 9,580 | Fair |
| Willow ST over Records Pond | Sussex | 1910 | | Concrete | 99 | Good |
| Dupont Blvd/us113 over Wartons Branch | Sussex | 1911 | 1965 | Concrete | 23,985 | Fair |
| Brooklyn Bridge over I278 Fdr Drive Fdr Dri | | 1883 | 2016 | | 110,939 | Poor |
| Old Milltown Rd. over Mill Creek | New Castle | 1913 | 1999 | Steel | 11,553 | Fair |
| Poplar ST over Broad Creek | Sussex | 1915 | 1996 | Steel Continuous | 3,164 | Fair |
| New Road over Waterway | New Castle | 1917 | 2000 | Prestressed Concrete | 626 | Fair |
| New Road over Little Mill Creek | New Castle | 1917 | 2000 | Prestressed Concrete | 1,317 | Fair |
| Guyencourt Rd. over Reading Rr | New Castle | 1918 | 1982 | Wood or Timber | 537 | Fair |
| Pennsylvania /sr52 over Waterway & Abandon R.r. | New Castle | 1919 | 2006 | Aluminum/Wrought Iron/Cast Iron | 16,691 | Fair |
| South State ST over Tidbury Branch | Kent | 1919 | 1958 | Concrete | 9,355 | Fair |
| State ST over Isaac Branch-moores Lake | Kent | 1919 | 1957 | Concrete | 11,225 | Fair |
| Bridgeville Hgwy over Clear Brook | Sussex | 1919 | | Concrete | 3,966 | Fair |
| Old Furnace Rd. over Nanticoke River | Sussex | 1919 | | Concrete | 4,583 | Fair |
| Dupont Pkw/us13 SB over Blackbird Creek | New Castle | 1920 | | Concrete | 11,020 | Poor |
| Dupont HWY SB over Murderkill River | Kent | 1920 | 2001 | Prestressed Concrete | 12,269 | Good |
| Rd104/kenton RD over Mudstone Branch | Kent | 1920 | 1934 | Concrete | 6,536 | Fair |
| Seashore Hy/sr18 over Nanticoke River | Sussex | 1920 | 1962 | Concrete Continuous | 11,140 | Fair |
| Laurel RD over James Branch | Sussex | 1920 | | Concrete | 6,064 | Fair |
| County Seat Hy/us9 over Tyndall Branch | Sussex | 1920 | 1995 | Concrete | 6,883 | Fair |
| Creek Rd/sr82 over Red Clay Creek | New Castle | 1922 | 2002 | Concrete | 2,428 | Fair |
| Faulkland RD over Hyde Run | New Castle | 1922 | | Steel | 3,319 | Fair |
| Old Baltimore Pike over Christina Creek | New Castle | 1922 | | Concrete | 12,169 | Fair |
| Washington St. over Brandywine Ck Conrail | New Castle | 1922 | 2000 | Concrete | 10,601 | Fair |
| Dupont Hwy/us13 over Army Creek | New Castle | 1922 | 1975 | Concrete | 40,517 | Fair |
| Milford-harrington over Browns Branch | Kent | 1922 | 2001 | Concrete | 7,277 | Good |
| Seashore Highway over Collins Mill Pond | Sussex | 1922 | 1962 | Concrete | 10,964 | Good |
| Seashore Highway over Deep Creek | Sussex | 1922 | 1965 | Steel | 13,664 | Good |
| Central AVE over Broad Creek | Sussex | 1923 | 2019 | Prestressed Concrete | 5,984 | Fair |
| Rockland RD over Wilson Run | New Castle | 1925 | 2005 | Prestressed Concrete | 64,449 | Fair |
| Kennett Pike/sr52 over Waterway | New Castle | 1925 | | Concrete | 12,820 | Fair |
| 16th ST over Brandywine River | New Castle | 1925 | 1995 | Prestressed Concrete | 99 | Fair |
| Old Dupont Rd. over Little Mill Creek | New Castle | 1926 | 2000 | Steel | 5,558 | Good |
| Papermill Rd/sr 72 over Pike Creek | New Castle | 1926 | 2007 | Concrete | 15,802 | Good |
| Glasgow Ave. over Muddy Run | New Castle | 1926 | 1998 | Other | 11,825 | Good |
| Front ST over Nanticoke River | Sussex | 1926 | 1992 | Steel | 8,015 | Fair |
| Bear Corbitt RD over Red Lion Creek | New Castle | 1927 | | Concrete | 5,593 | Fair |
| Clayton Delaney RD over Paw Paw Branch | New Castle | 1927 | 1965 | Steel | 943 | Fair |
| South Market ST over Christina River | New Castle | 1927 | 1982 | Steel | 28,795 | Fair |
| Rising Sun Lane over Brandywine Creek | New Castle | 1928 | 1979 | Steel | 2,103 | Fair |
| Chambers Rock RD over White Clay Creek | New Castle | 1928 | 1995 | Steel | 3,582 | Good |
| SR 299/main Street over Appoquinimink River | New Castle | 1928 | 1991 | Steel Continuous | 3,582 | Fair |
| North Market ST over Brandywine Creek | New Castle | 1928 | 2002 | Steel | 12,035 | Fair |
| Hemping RD over Marshyhope Creek | Kent | 1928 | 1969 | Steel | 85 | Fair |
| Yorklyn RD over Red Clay Creek | New Castle | 1929 | 1990 | Steel | 4,402 | Fair |
| Dupont HWY / Us13s over Leipsic River | Kent | 1929 | 1986 | Concrete | 13,623 | Fair |
| Rehoboth Blvd. over Mispillion River | Kent | 1929 | 1996 | Steel | 8,098 | Fair |
| Fawn RD over Nanticoke River | Sussex | 1930 | | Steel | 931 | Fair |
| Old Capital Trail over Red Clay Creek | New Castle | 1931 | 1989 | Steel | 10,072 | Fair |
| Maryland Ave/sr4 over Little Mill Creek | New Castle | 1931 | | Concrete | 17,909 | Fair |
| Silver Lake Rd. over Silver Lake Spillwy | New Castle | 1931 | 1939 | Steel | 5,932 | Good |
| Whiteleysburg RD over Marshyhope Ditch | Kent | 1931 | 1957 | Concrete | 1,923 | Good |
| Cods Road over Slaughter Creek | Sussex | 1931 | | Steel | 78 | Poor |
| Rockland RD over Husbands Run | New Castle | 1932 | 1993 | Concrete | 4,296 | Fair |
| Northeast BLVD over Brandywine River | New Castle | 1932 | 1994 | Steel | 16,007 | Fair |
| Zoar Rd. over Morris Mill Pond | Sussex | 1932 | | Concrete | 6,149 | Fair |
| Clendaniel Pond RD over Clendaniel Pond | Sussex | 1932 | | Concrete | 1,276 | Fair |
| Rockland RD over Brandywine Creek | New Castle | 1933 | 1993 | Steel | 4,319 | Fair |
| Adams Dam RD over Wilson Run | New Castle | 1933 | 1998 | Prestressed Concrete | 4,319 | Fair |
| Us13nb/dupont Pky over Drawyers Creek | New Castle | 1933 | 1991 | Prestressed Concrete | 28,234 | Fair |
| Alley Mill RD over Paw Paw Branch | New Castle | 1933 | | Concrete | 951 | Fair |
| Dupont Pky/us13 NB over Blackbird Creek | New Castle | 1933 | | Concrete | 11,021 | Fair |
| Brenford RD over Masseys Pond/leipsic Riv | Kent | 1933 | | Concrete | 1,602 | Fair |
| Washington ST over Mispillion River | Kent | 1933 | 2012 | Steel | 99 | Good |
| Old Furnace Rd. over Deep Creek | Sussex | 1933 | | Steel | 3,325 | Fair |
| Carr RD over Shellpot Creek | New Castle | 1934 | 2017 | Steel | 1,896 | Fair |
| Governr Prntz BLVD over Stoney Creek | New Castle | 1934 | 2003 | Prestressed Concrete | 5,255 | Good |
| Gov Printz BLVD over Shellpot Creek | New Castle | 1934 | 2000 | Prestressed Concrete | 9,626 | Fair |
| Dupont HWY / Us13n over Little Duck Creek | Kent | 1934 | 1986 | Concrete Continuous | 13,624 | Fair |
| Loockerman ST over St. Jones River | Kent | 1934 | | Concrete | 7,666 | Fair |
| Kenton RD over Cahoon Brook | Kent | 1934 | | Concrete | 6,553 | Good |
| Kenton Rd/sr15 over Fork Branch | Kent | 1934 | | Concrete | 5,372 | Good |
| Redden Rd. over Gravelly Branch | Sussex | 1934 | 1961 | Steel | 2,950 | Fair |
| Grears Corner Rd. over Barlow Branch | New Castle | 1935 | | Concrete | 2,266 | Fair |
| Gov. Printz BLVD over Hollyoak Creek | New Castle | 1935 | 1940 | Steel | 4,867 | Fair |
| Newport Gap Pike over Hyde Run | New Castle | 1936 | 2000 | Concrete | 13,392 | Fair |
| Summit Bridge RD over Cattail Branch | New Castle | 1936 | 1948 | Steel | 7,273 | Fair |
| S. College AVE over Amtrak & Conrail | New Castle | 1936 | 1986 | Steel | 16,840 | Fair |
| Beach Hgwy / SR 16 over Nanticoke River | Sussex | 1936 | 1957 | Steel | 9,027 | Fair |
| Main St/christiana over Christina River | New Castle | 1937 | 1997 | Steel | 4,121 | Fair |
| North State ST over Silver Lake | Kent | 1937 | | Concrete | 13,072 | Fair |
| S. Walnut St/us13 over Norfolk Southern | New Castle | 1938 | 1994 | Prestressed Concrete | 25,312 | Fair |
| Bayard Ave./sr1a over Silver Lake | Sussex | 1938 | 1995 | Wood or Timber | 6,130 | Fair |
| Snuff Mill RD over Barrows Run | New Castle | 1939 | 2004 | Steel | 1,067 | Fair |
| Creek Rd/sr82 over Red Clay Creek | New Castle | 1939 | | Steel | 2,428 | Fair |
| Kirkwood Hwy/sr2 over Chestnut Run | New Castle | 1939 | 2002 | Concrete | 29,701 | Good |
| Kirkwood Hwy/sr2 over Little Mill Creek | New Castle | 1939 | 1998 | Concrete | 27,573 | Good |
| Silver Lake Rd. over Silver Lake Spillway | New Castle | 1939 | | Concrete | 5,932 | Good |
| John J Williams Hy over Burton Prong | Sussex | 1939 | | Concrete | 18,035 | Good |
| Kirkwood Hwy/sr2 over Red Clay Creek & Rr | New Castle | 1940 | 1988 | Steel Continuous | 20,030 | Fair |
| Kirkwood Hwy/sr2 over Red Clay Creek & Rr | New Castle | 1940 | 1988 | Steel Continuous | 20,030 | Fair |
| Dupont Hwy/us13 over Mill Creek | Kent | 1940 | | Concrete | 23,499 | Good |
| Stein Hwy/sr20 over Norfolk Southern | Sussex | 1940 | 1996 | Steel | 15,824 | Fair |