Stormwater Management Data for Sediment Control Permits

The Maryland Department of the Environment (MDE) requires Montgomery County to document information for each stormwater best management practice (BMP) for the County’s Municipal Separate Storm Sewer System (MS4) Permit.

As such, Effective July 1, 2024, Montgomery County will collect stormwater management (SWM) data for each new sediment control permit that requires stormwater management in order to meet MDE requirements and for SWM BMP tracking purposes.

Stormwater Management Data Submission Instructions

  1. Is stormwater management data required?

    No, if stormwater management is not required for the project, no further action is required.

    Yes, if stormwater management is required even if it is waived or otherwise cannot be provided for the project, proceed to Step 2.

  2. Download the stormwater management data file

    SWM Sites (XLSX)

  3. Rename the stormwater management data file

    You must include the sediment control permit number and the project name.
    Example: 'SC-123456-project-name.xlsx'

  4. Enter stormwater management data

    Complete all fields and records except those that are not applicable to the project. The following fields are not applicable if:

    • No SWM is waived: Quality/Quantity Waived and Waiver Amount
    • No quantity management is provided: Quantity Types Managed
    • No 10-year discharge was calculated: 10 Year Storm Discharge sheet/tab

  5. Submit stormwater management data file

    Engineered Sediment Control Plan

    If your project has an Engineered Sediment Control Plan, email the data file when submitting as-built plans to DPS for review to [email protected].

    Engineered Single Family Lot Plan

    If your project has an Engineered Single Family Lot Plan, email the data file when submitting an Engineered Single Family Lot Plan to DPS for review to [email protected].

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