The following manual is an updated version to Trumbull County’s existing drainage manual which this office will be using to supplement the Phase II requirements set forth by the Environmental Protection Agency (EPA) Clean Water Act. The manual will aid developers and engineers in design and plan submission in order to comply with the Ohio EPA requirements for post-construction runoff and storm water management for new developments and redevelopment projects. Said manual was adopted by the Trumbull County Commissioner’s on September 24, 2008, and is duly recorded in Commissioner’s Journal Volume 131, page 13761.
Storm Water Drainage Review Agreement for Commercial/Industrial Development Sites
Storm Water Review and Inspection Agreement for Subdivisions
Trumbull County Drainage and Erosion and Sedimentation Control Manual
On February 11, 2026, the Trumbull County Commissioners adopted an updated TRUMBULL COUNTY ENGINEER’S DRAINAGE AND STORMWATER MANAGEMENT AND TRUMBULL COUNTY SOIL & WATER CONSERVATION DISTRICT STORMWATER POLLUTION PREVENTION PLAN MANUAL. The manual has been updated to reflect the Water Quality Volume as required by the OhioEPA and to better define the roles of the Engineer’s office and the Trumbull County Soil & Water Conservation District with respect to submissions and approvals.
Other revisions include:
Updated rainfall amounts
This manual will become effective March 11, 2026. Any plans and calculations submitted on or after that date shall conform to the new manual.