General Supplemental Design Standards

The following items have been approved by the SUDAS Board of Directors and available for use. These items will be included in the 2025 Edition of the SUDAS Design Standards in December. Click on the topic title for the marked up version of the revision; click on the section reference for a clean version of the section that incorporates the change.

Errata and format revisions
Correcting minor errors and formatting revisions.

Project drainage report and detention practices (Sections 2A-4 and 2G-1)
Modify language to meet Iowa Code 331 and Iowa Code 364 as amended by SF455.  Removed storm duration from calculation of the allowable release rate.

Erosion and sediment control (Design 7E-5, 7E-18, and 7E-21)
Updated to reflect current practices.