Guidance Documents

• Stormwater Management Supplement to the MD Design Manual (August 2010)
• Stormwater Management Supplement to the MD Design Manual Updates (including checklists) (November 2018)
• Definition of the "Site" (revised 10/26/2022)
• Dam Breach Statement
• Policy on Use of Underground SWM Structures in Carroll County, Maryland
• ESD Practices Requiring Onsite Soils/Infiltration Testing(revised 10/19/2022)

     Residential

• Standard SWM for Single Lot Residential Construction
• Environmental Site Design - Dry Wells (added 10/20/2022)
• SWM Drywell Bonding Procedures (revised 07/9/2021)

     Agriculture

• Agriculture Structure Stormwater Policy

     Solar

• Solar Panel

Legal Documents

• Application for a Variance - Stormwater Management (Chapter 151 of Carroll County Code)
• Sample SWM Deed of Easement and Maintenance Agreement

Materials Specifications

• Bio-Swale, Bioretention, Micro-Bioretention & Rain Gardens (revised 11/20/2023)
• Sand Filters (revised 9/16/2024)
• Submerged Gravel Wetlands (SGWs) (revised 9/16/2024)

Minimum Requirements

• SWM Review Minimum Requirements (revised 1/17/2024)
• Minimum Design Criteria 6 & 7

Operation & Maintenance Inspection Reports

• Permeable Paving by Owner
• Underground SWM Facility

Stormwater Maintenance Schedules

• Bio-Swale
• Drywell
• High Flow Rate Filters
• Micro-Bioretention
• Non-Rooftop Disconnection Wide Shoulder Technique
• Pavement Removal "Urban Soil Restoration"
• Permeable Paving
• Sheet Flow to Conservation Area
• Submerged Gravel Wetland
• Surface Sand Filter Inside MD-378 Pond
• Surface Sand Filter Not in MD-378 Pond
• Underground Facilities
• Underground Infiltration Trench and Commercial Dry Well