Warren Co SWCD works in partnership with City of Mason to assist with the City of Mason MS4 Permit compliance. The City of Mason contracts with Warren SWCD for multiple MS4 permit requirements, but this page pertains to Minimum Control Measure 4. Construction Site Runoff Control.
If your project is in the City of Mason, you will need to follow the process on this page prior to the pre-construction meeting and to obtain approval to disturb earth.
If your project is in the City of Mason, you will need to follow the process on this page prior to the pre-construction meeting and to obtain approval to disturb earth.
EDP Process for City of Mason MS4:
Note: Electronic submittals of all materials are required.
- Submit full set of construction plans and the Stormwater Pollution Prevention Plan that comply with the City of Mason Regulations to the City of Mason.
- Submit Operation and Maintenance documents to the City of Mason, record when approved.
- Submit EPA NOI permit verification to the City of Mason.
- Submit environmental assessments if applicable to the City of Mason.
- Submit EDP Application to the City of Mason, no fee. This application must be submitted in order to schedule the pre-construction meeting.
- Work with City of Mason and Warren Co SWCD on approval of all items.
- Obtain approvals on all items.
- Set up pre-construction meeting with City of Mason and Warren SWCD.
- Begin clearing, grubbing and other earth disturbing activities.
- When post construction stormwater control measures (SCMs) are complete, submit the Warren Co Post Construction Stormwater Control Measure Approval form.
Note: Electronic submittals of all materials are required.
Regulations & Guidance:
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City of Mason Stormwater Regulations and Erosion & Sediment Control Regulations exist in the Zoning Ordinance The City of Mason Zoning Ordinance is put in place to uphold the Ohio EPA NPDES Construction General Permit. All requirements of the CGP apply in addition to the City of Mason Zoning Ordinance. |
Please follow this manual for all technical guidance and specifications for sediment and erosion control measures. This spreadsheet allows engineers to enter design data and receive output information important to SWPPP review. Filling out and submitting this spreadsheet to Warren Co SWCD with SWPPP documents will speed up review and ensure compliance with requirements of the CGP. |
Stormwater Pollution Prevention Plans (SWP3):
The SWP3 contents are described in Part III of the NPDES Construction General Permit (CGP). Although the SWP3 does not need to be submitted to Ohio EPA to obtain coverage under the CGP through the NOI application, it must be retained at the construction site at all times during the construction activity. However, Warren SWCD does require submittal and approval of the SWP3 as part of the EDP requirements.
An SWP3 must address all minimum components of the CGP and conform to the specifications of Ohio Department of Natural Resources' Rainwater and Land Development Manual. This manual describes Ohio’s standards for storm water management, land development, and urban stream protection.
An SWP3 must address all minimum components of the CGP and conform to the specifications of Ohio Department of Natural Resources' Rainwater and Land Development Manual. This manual describes Ohio’s standards for storm water management, land development, and urban stream protection.
OEPA NOI:
The NOI process is now completely online through the EPA website utilizing a program called STREAMS. Follow the link below to apply for and NOI.
Operation and Maintenance Document Guidance:
Operation and Maintenance documents typically entail the O&M Agreement and the O&M Plan. In Ohio, responsibility for operation and maintenance of all post construction stormwater control measures (SCM) lies with the owner of the SCM. Typically, the property owner on which the SCM is constructed is the owner of the control measure and is legally obligated to operate and maintain the control measure. In some cases, a separate entity, such as a homeowners association, might take responsibility for a SCM. Legal obligations for operation, maintenance, inspection and repair of SCMs will be identified in the O&M documents. O&M Agreements are typically executed between the property owner and a local government jurisdiction (i.e. municipal or county department). An O&M Agreement and Plan are legally binding documents that lists the SCMs and their legally defined locations, ownership, operation and maintenance requirements. Inspection frequency, funding requirements and access easements to the SCMs are also a necessary part of all O&M Plans.
Warren County Recorder's Office has specific requirements for all documents to be recorded. If these guidelines are not followed, a $20 fee will ensue.
Please contact Warren Co SWCD if you would like examples of O&M documents!
Warren County Recorder's Office has specific requirements for all documents to be recorded. If these guidelines are not followed, a $20 fee will ensue.
- Computer font size of at least 10 point;
- Minimum paper size – 8 ½ x 11, maximum paper size – 8 ½ x 14;
- Black or Blue Ink ONLY;
- No use of highlighting;
- Margins of 1 inch on each side of the page and on the bottom;
- 3 inch margin on the top of the first page, reserved for recorder, auditor & engineer;
- 1 ½ inch margin on the top of each of the remaining pages.
Please contact Warren Co SWCD if you would like examples of O&M documents!
