What are Engineering Directives?

RWRD is in the process of clarifying and improving the design standards and details for sewer conveyance systems. New standards and modifications to standards are included in Engineering Directives.

Please incorporate these Directives in your design of sewer conveyance systems.

Engineering Directives can also be found under Standard Details, organized by section.

Recent Engineering Directives and Policies

• 2010-01 - Compaction Testing of Fill and Backfill Installed for Public Sanitary Sewer, effective February 1, 2010
• 2009-19 - Sewer Design and As-built Slope Annotation, effective January 1, 2010
• 2009-18 - Sewer Pipe Slope and Manhole Invert Construction Tolerances, effective May 1, 2009

All Engineering Directives

• 2005-01- Private Service Lateral (HCS) Design and Construction Requirements
  • Memorandum of Understanding Regarding Construction of Private Cleanouts (PDF). Also available as a Word file. March 28, 2007. Based on the 2005-01 Directive, this form is a required submittal ensuring adherence to RWRD's HCS cleanout standards and listing all lots with buried HCS cleanouts.
• 2005-02 - Manhole with Joint Reinforcement - Standard Detail 223
• 2005-03 - Public Sewer Stub-Out
• 2005-04 - Engineering Standards Committee
• 2005-05 - Maintenance Vehicle Access Within Cul-de-Sacs
• 2005-06 - Short Easement Access
• 2006-08 - Private Sewer Laterals in a Terminal Manhole
• 2006-09 - Flow Management Considerations During Design
• 2006-10 - Cones and Grade Rings in Manhole Construction
• 2006-11 - Survey Cut Sheet Deliverable
  • Survey Cut Sheet Deliverable Form (PDF). Also available as a Word file. This form is the standard form for written or typed data. If an electronic survey download is used, the form may be replaced, but all information and table format must be retained.
• 2006-13 - Manhole Invert Slopes
• 2006-15 - Manhole Interior Coating Requirements
• 2008-16 - Revised Sand Bedding for Sanitary Sewers - Standard Details WWM-104 and WWM-105
• 2008-17 - CCTV Inspection for New Sewer Construction Acceptance
• 2009-18 - Sewer Pipe Slope and Manhole Invert Construction Tolerances
• 2009-19 - Sewer Design and As-built Slope Annotation, effective January 1, 2010
• 2010-01 - Compaction Testing of Fill and Backfill Installed for Public Sanitary Sewer, effective February 1, 2010

Ordinances

• Ordinance Governing Repair and Replacement of House Connection Sewers
  • PN0026 - Department Policy Based on Ordinance - Policy includes procedure for requesting RWRD assistance with private HCS repairs

Engineering Policies

• Letter governing use of 20-foot lengths of PVC pipe in sewer construction - Cancellation of previous variance