Title
Notice/Advertisement Title: Stormwater Drainage Manual Regulation
Contact Name: Liz Miller
Contact Telephone Number: (614) 645-0919
Contact Email Address: ColumbusSWDM@columbus.gov
Body
OFFICIAL NOTICE
STORMWATER DRAINAGE MANUAL REGULATION
FINAL ADOPTION
Pursuant to Columbus City Code 1145.11 and 1145.81, the Department of Public Utilities hereby provides notice that the Director has adopted the Stormwater Drainage Manual regulation. The Manual provides the stormwater design standards for development or redevelopment of public and private property. This regulation replaces the previous Stormwater Drainage Manual, which was previously updated in 2025. The following changes were made from the previous regulation:
1. Throughout - Updated Department of Public Utilities (DPU) to Columbus Water and Power (CWP), Division of Sewerage and Drainage (DOSD) to Division of Water Reclamation (DWR), and Division of Electricity to Division of Power.
2. Table of Contents - Added equation numbering.
3. Preface Legacy Plans - Updated to remove direct reference to years and replaced with “previous” and “current”.
4. Introduction Applicability Table - Reformatted into a single page table with table notes on the following page. Added Sections 3.5 and 8. Added considerations that were previously presented below the table and the reference to the Section 3.2 proximity to Fourth Order Stream exemption update.
5. Introduction Definitions - Updated Redevelopment definition and added Fourth Order Stream definition.
6. Section 1.3.1 - Updated to move the 50-foot buffer for the fourth order streams requirement outside of the width calculation. Requirement is now in addition to the calculated width similar to the 15% slope requirement.
7. Section 1.3.2 - Updated in 2025 and revisited in 2026 to allow for modifications, where approved by DWR, to comply with federal and state requirements.
8. Section 1.3.3 - Updated to permit annual mowing for establishment of native trees and...
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