2024 Sewer Engineering Standards Details | City of Bellevue

Bomb cyclone storm impacts

A bomb cyclone windstorm lashed Bellevue the night of Tuesday, Nov. 19, bringing down trees throughout the city and leaving hundreds of thousands without power. Most city facilities have power but some are on modified hours or closed due to power outages. Damages from the storm continue to impact Bellevue, prompting the mayor to proclaim a civil emergency in the city. Updates about the city's response will be posted at Bomb Cyclone Storm.

Beware of Utility Scams During Emergencies

Bellevue Utilities will typically contact you in advance if they need to access your home for repairs or inspections. If you are unsure, call Bellevue Utilities at 425-452-6932 to confirm if someone is supposed to be at your home.

2024 Sewer Engineering Standards

Individual Details

S-1: Standard Manhole

S-1A: Standard Structure Backfill

S-2: Type 2 Manhole, 72in and 96in

S-3: Type 3 Manhole, 72in and 96in

S-4: Outside Drop Structure

S-5: Inside Drop Structure

S-6: Manhole Under 5 Feet Deep

S-7: New Manhole on Existing Sewer

S-8: Manhole Grade Adjustment

S-9: Manhole Section Adjustment

S-10: Manhole Cone Adjustment (Concentric to Eccentric)

S-11: 24in Manhole Ring and Cover

S-12: 24in Bolt-Locking Manhole Ring and Cover

S-13: Safety Step and Prefabricated Ladder

S-14: Typical Trench Detail

S-15: Pipe Zone Bedding

S-16: Cleanout to Grade

S-17: Side Sewer Lateral

S-17A: Side Sewer Lateral on a New PVC Main

S-17B: New PVC Side Sewer Lateral on Existing PVC Main

S-17C: New PVC Side Sewer Lateral on Existing Non-PVC Main

S-18: House Sewer Connection

S-19: Soil Cement Pipe Anchors

S-20: Pipe Stake Anchor Assembly

S-21: Side Sewer Lateral Relocation

S-22: Timber Baffle Hill Holder

S-23: Lake Line Cleanout and Check Valve Assembly Installation

S-24: Lake Line Cleanout and Check Valve Assembly Installation at or Below Hydraulic Gradient

S-25: Cleanout to Grade for Lake Line Connection

S-26: Check Valve Assembly for Joint Use Side Sewer (4in to 8in Diameter)

S-27: Sampling Tee

S-28: 100 Gallon Baffle Type Oil Water Separator

S-29: 450-900 Gallon Baffle Type Oil Water Separator

S-30: 1100-5000 Gallon Baffle Type Oil Water Separator

S-31: Grease Interceptor

S-32: Uncovered Paved Vehicle Service Area Drainage

S-33: Casing Installation

S-34: Single Home Sewer Pump System

S-35: Project Sign

S-36: Tapping Tees for Lake Line Sewer Connection

S-37: Lake Line Lateral Extension