- DR 4-2011 & SPU DR 2011-004, Requirements for Design and Construction of Side Sewers (Drainage and Wastewater Discharges, went into effect April 8, 2011. This rule combines previous two Side Sewer Director’s Rules (DRs) into one rule and clarifies requirements in the Side Sewer Code (SMC 21.16)
- DPD DR 5-2011 & SPU DR 2011-005, Side Sewer Code Enforcement, went into effect on April 8, 2011. This rule clarifies new enforcement requirements in the Side Sewer Code (SMC 21.16)
- DR 9-2011, Height Measurement: Calculating Average Grade Level, provides two formulas for calculating average grade level that are part of a new height measurement technique adopted as part of the new multifamily zoning legislation. This rule went into effect April 28, 2011.
- DR 12-2011, Nighttime Amplified Sound Rule, went into effect April 11, 2011.