2 Del. Admin. Code § 5.10
Any structure, including supports, erected over a depression or an obstruction, such as water, a highway or a railway, for carrying vehicular or pedestrian traffic or other moving loads that has at least a 20' span length or has an opening exceeding 20 square feet and is 48" tall shall be reviewed by DelDOT's Bridge Design Section. Other structures not meeting the above criteria, including but not limited to box culverts and non-standard drainage structures, may require a separate review by DelDOT. Additional guidance can be found on DelDOT's website in the Doing Business section.
All structural designs shall be in accordance with applicable regulations, guidelines and standards, such as: DelDOT's Bridge Design Manual and AASHTO's Load and Resistance Factor Design (LRFD) Bridge Design Specifications.
If there are structural designs required on a plan and not included in the Standard Construction Details, shop drawings signed and sealed by a professional engineer registered in the State of Delaware shall be submitted for review and approval.
2 Del. Admin. Code § 5.10
15 DE Reg. 551 (10/01/11)
16 DE Reg. 1199 (5/1/2013)
18 DE Reg. 240 (9/1/2014)
18 DE Reg. 709 (3/1/2015)
19 DE Reg. 938 (4/1/2016) (Final)