Home › Scour-Critical Bridges › DelawareScour-Critical Bridges in Delaware
Delaware has 39 bridges rated scour-critical by the Federal Highway Administration. These bridges have foundations that are unstable or at risk of undermining during flood events. Scour-critical doesn't mean a bridge is about to collapse — it means extra monitoring and countermeasures are in place — but these structures are priorities for repair or replacement.
How this ranking works This state list filters to NBI scour ratings 0 through 3, then sorts by average daily traffic. It is intended to show flood-vulnerability exposure, not to label any bridge as currently unsafe.
Bridge County Scour Rating Daily Traffic Condition Capitol Trail/sr2 over White Clay Creek New Castle 3 — Serious 23,150 Fair Kirkwood Hwy/sr2 over Trib To Little Mill Crk New Castle 3 — Serious 21,909 Good Kirkwood Hwy/sr2 over Red Clay Creek & Rr New Castle 3 — Serious 20,030 Fair Kirkwood Hwy/sr2 over Red Clay Creek & Rr New Castle 3 — Serious 20,030 Fair Sr4 Westbound over Red Clay Creek New Castle 3 — Serious 16,101 Fair Dupont HWY / Us13n over Little Duck Creek Kent 3 — Serious 13,624 Fair Dupont HWY / Us13s over Leipsic River Kent 3 — Serious 13,623 Fair Newport Gap Pike over Hyde Run New Castle 3 — Serious 13,392 Fair Kennett Pike/sr52 over Waterway New Castle 3 — Serious 12,820 Fair Division St. / Sr8 over St. Jones River Kent 3 — Serious 11,547 Fair State ST over Isaac Branch-moores Lake Kent 3 — Serious 11,225 Fair Seashore Hy/sr18 over Nanticoke River Sussex 3 — Serious 11,140 Fair Dupont Pky/us13 NB over Blackbird Creek New Castle 3 — Serious 11,021 Fair Dupont Pkw/us13 SB over Blackbird Creek New Castle 3 — Serious 11,020 Poor Old Capital Trail over Red Clay Creek New Castle 3 — Serious 10,072 Fair South State ST over Tidbury Branch Kent 3 — Serious 9,355 Fair Loockerman ST over St. Jones River Kent 3 — Serious 7,666 Fair Milford-harrington over Browns Branch Kent 3 — Serious 7,277 Good Zoar Rd. over Morris Mill Pond Sussex 3 — Serious 6,149 Fair Laurel RD over James Branch Sussex 3 — Serious 6,064 Fair Bridgeville Hgwy over Clear Brook Sussex 3 — Serious 3,966 Fair Old Mill Bridge RD over Dirickson Creek Sussex 3 — Serious 3,548 Fair SR 36 / Shawnee RD over Johnson Branch Sussex 3 — Serious 3,486 Fair Wooddale RD over Mill Race New Castle 3 — Serious 3,366 Fair Grears Corner Rd. over Barlow Branch New Castle 3 — Serious 2,266 Fair Miller Rd. over Matson Run New Castle 3 — Serious 1,932 Fair SR 54/cypress Rd. over Pocomoke River Sussex 3 — Serious 1,366 Fair Clendaniel Pond RD over Clendaniel Pond Sussex 3 — Serious 1,276 Fair Cypress Rd. / Sr54 over Bald Cypress Branch Sussex 3 — Serious 1,136 Fair Wedgewood RD over Christina Creek New Castle 3 — Serious 987 Good Alley Mill RD over Paw Paw Branch New Castle 3 — Serious 951 Fair Clayton Delany Rd. over Providence Creek New Castle 3 — Serious 943 Good Hills Market RD over Black Swamp Creek Kent 3 — Serious 667 Fair Mahan Corner RD over Culbreth Marsh Ditch Kent 3 — Serious 660 Good Cedar Grove Church over White Marsh Branch Kent 3 — Serious 192 Fair State Park Entranc over Wilson Run New Castle 3 — Serious 99 Good Brennen DR over Trib. To White Clay Cree New Castle 3 — Serious 99 Fair Cods Road over Slaughter Creek Sussex 3 — Serious 78 Poor Granville RD over Pike Creek New Castle 3 — Serious 21 Good