Supporting Documents for the 2016 Drainage Manual


Adopting 2009 Policies (also called Policy about Policies) (PDF)

Stormwater Regulation Vesting Policy (PDF)

Closed-circuit Television Inspection (PDF)

Subdivision Land Area Calculations (PDF)


These checklists reflects most, but not necessarily all, of the items that will be reviewed by Development Review. They are intended to be used as an aid by us to provide a consistent review of development work in Thurston County. All items may not be applicable in the review of each project and all items of concern to this office may not be covered in these checklists.

Drainage Report Checklists

Project Review Flow Chart (PDF)

Project Elements Submission Completeness Checklist (PDF)

Drainage Report Required Elements (PDF)

LID Infeasibility Criteria Checklist (PDF)

Infiltration Facility Procedures Checklist (PDF)

Methods for Determining Infiltration Rates Checklist (PDF) 

Geotechnical and Infiltration facilities (PDF) 

Construction Plans Required Elements (PDF)

BMP Checklists

LID.02_Soil Preservation and Amendment Checklist (PDF)

LID.04_Downspout Infiltration Checklist (PDF)

LID.05_Downspout Dispersion Checklist (PDF)

LID.06_Sheet Flow Dispersion Checklist (PDF)

LID.07_Concentrated Flow Dispersion Checklist (PDF)

LID.08_Bioretention Checklist (PDF)

LID.09_Permeable Pavement Checklist (PDF)

LID.11 Full Dispersion Checklist (PDF)

LID.14_Tree Retention and Planting Checklist (PDF)

Rain Gardens Checklist (PDF)

IN.01_ Infiltration Basins Checklist (PDF)

D.01_Detention Ponds Checklist (PDF)

LID Field Design Checklist (PDF)

Administrator Memos

Scoping Report Submittal Exemption for Single Family Residences (PDF)  

Checklist Submittal Requirements (PDF)

Mechanical Equipment (PDF)

Rural Large Lots (PDF)

Salmon Creek Basin (PDF)

Fact Sheets

Differences between the 2009 and 2016 Drainage Manuals (PDF)

Eleven Core Requirements & When They Apply (PDF)

What You Need to Know About Abbreviated Drainage Plans (PDF)

How to Determine Whether You Can Submit An Abbreviated Drainage Plan (PDF)

Sample Abbreviated Drainage Plan (PDF)

What is in the 2016 Drainage Manual? (PDF)

Stormwater Problems & Impacts: Why the Fuss? (PDF)

Single Family Residential Projects - On a Single Lot (PDF)

The Drainage Scoping Report - A New Requirement (PDF)

Project Documents/Templates

Complete and submit applicable documents as part of your stormwater maintenance agreement with Thurston County.

Most projects typically require these 

Checklists for Agreement to Maintain all facility types  PDF  |  Word

Engineers Construction Inspection Report (PDF)

Facility Summary Form (PDF)

Short Form Construction Stormwater Pollution Prevention Plan (SWPPP) Template    Fillable PDF Form

Standard Stormwater Notes (PDF)

Stormwater Conveyance Connection Application (PDF)

Commercial & Subdivision-Residential

Agreement to Maintain Commercial   Fillable PDF Form

Agreement to Maintain Subdivision-Residential   Fillable PDF Form

Bond Quantities Worksheet  Fillable Excel Worksheet  

Checklist - Final Acceptance Requirements (Due prior to release of Financial Guarantees)  (PDF)

Drainage Marking Detail (PDF)

Low Pressure Air Test Report Form (PDF)

Operation & Maintenance Cost Estimate Worksheet (PDF)

Source Control Plan for Commercial  Word  |  PDF

Source Control Plan BMPs  Word  |  PDF

Single Family Residential

Agreement to Maintain   Fillable PDF Form

Source Control Manual, Residential Stormwater Pollution Prevention (PDF)