Engineering Design and Development Standards December 1, 2017

CHAPTER 5 STANDARD DRAWING INDEX Current WSDOT

EDDS Standard Title Standard Plan No.

Drawing No. or Other Source 1/

5-010 Shoulder Ditches

Interceptor Ditch and Checkdam BMP C207 2/

5-030 Yard Drain Connections

Pipe Zone Bedding and Backfill B-55.20-00

Beveled End Sections B-70.20-00

5-060 Pipe/Culvert Outfall Discharge Protection Pad

5-070 Grass Swale Dispersion System

5-080A Level Spreader Trench – PVC

5-080B DELETED 2016

5-080C Level Spreader Trench Notes

5-085 Diffuser Tee

5-090 Debris Barrier

Catchbasin Type I B-05.20-00

Catchbasin Type 1-L B-05.40-00

Catchbasin Type 1-P B-05.60-00

Catchbasin Type 2 B-10.20-00

Concrete Inlet B-25.60-00

5-120 Catchbasin Details

Manhole Type 1 B-15.20-00

Manhole Type 2 B-15.40-00

Manhole Type 3 B-15.60-00

Manhole Type 4 DELETED

5-170 Manhole Details

Rectangular Frame (Reversible) B-30.10-00

Rectangular Solid Metal Cover B-30.20-01

Rectangular Vaned Grate B-30.30-00

Rectangular Bi-Directional Vaned Grate B-30.40-00

Combination Inlet B-25.20-00

5-220A Rolled Curb Frame & Grate 3/

5-220B Rolled Curb Frame & Grate Installation 3/

5-225 Rolled Curb Vaned Grate 3/

5-230 Manhole Ring and Cover

5-240A Typical Detention Pond

5-240B Typical Detention Pond Sections

5-245 Overflow Structure

5-250A Flow Splitter, Option A

5-250B Flow Splitter, Option B

5-260 Flow Restrictor (Baffle)

5-265 Flow Restrictor (Weir)

Engineering Design and Development Standards December 1, 2017

5-270A Flow Restrictor/Oil Pollution Control - T Restrictor Notes

5-270B Flow Restrictor/Oil Pollution Control - T Restrictor

5-270C Oil Pollution Control Catchbasin

5-275 Flow Restrictor/Oil Pollution Control - T Shear Gate Detail

5-280 Typical Detention Vault

5-290 Typical Detention Tank

5-295 Detention Tank Access Detail

5-300A Sand Filter Vault

5-300B Sand Filter Vault

5-310 API Separator (Baffle type)

5-315 Coalescing Plate Separator

1/ Refer to WSDOT Standard Plans webpage for the currently-effective drawings listed.

2/ Located in the Snohomish County Drainage Manual.

3/ For replacement of existing frames and grates only; not for new installation.