Planning (Phase 1) Forms

The preliminary design forms or applications needed for Planning (Phase 1) are listed here.

Feasibility Review Form

• Water Resource Recovery Facility Service Areas

Preliminary Form

• Government Referred Plan Review Requirements Checklist (DOC 226 KB)

Hydraulic Forms

• Hazen-Williams Formula (XLS 153 KB)
• Hydraulic Grades (PDF 64.7 KB)
• Hydraulic Information Available From WSSC 
• Hydraulic Information Sheet (PDF 137 KB)
• Manning's Formula for Full Flow (XLS 146 KB)
• Determining High and Low Domestic Pressures 
• Name Change-Transfer of Ownership Form (PDF 1.61 MB)
• Effective September 2, 2026, WSSC Water will no longer accept Fire Flow Test Requests or payments by U.S. mail. To provide our commercial customers with a faster, more convenient experience, WSSC Water is moving Fire Flow Test Requests and payments to an online process. Please use the online Fire Flow Test Application to submit your request and payment. The interactive application will guide you through the process and provide instructions to help ensure your request is submitted accurately and efficiently. This new process is designed to make submitting a Fire Flow Test Request simpler, faster and more seamless. If you have questions or need assistance, please contact Michael Duckworth at [email protected].