Watershed Documents and Forms

The following documents are effective on March 29, 2021 and include minor revisions that the City has made to the Stormwater Management Manual and related documents.

• Stormwater Management Manual
• Definitions (Appendix A)
• Residential Guidance (Appendix B)
• Erosion Control Manual (Appendix C)
• Sizing Methods (Appendix D)
• Infiltration Testing (Appendix E)
• Soil and Mulch Specs (Appendix F)
• Planting (Appendix G)
• Typical Details (Appendix H)

 Additional resources 

Gresham stormwater plant list

2020

• Surface water

2019

• Surface water

2018

• Surface water
• Groundwater 

2017

• Surface water
• Groundwater

2016

• Surface water
• Groundwater

2015

• Surface water
• Groundwater

• Gresham Revised Code
• Development Code for Stormwater 
• Gresham code review of habitat-friendly development practices
• Public Works Standards

National Pollutant Discharge Elimination System (NPDES) permit documents

• Gresham and Fairview NPDES stormwater discharge permit 
• Gresham stormwater management plan
• Gresham and Fairview environmental monitoring plan -- effective July 1, 2016
• Monitoring plan appendices

Total Maximum Daily Load (TMDL) plan and associated documents

• Gresham TMDL plan (2018-2023)
• NPDES Wastewater permit (2014)
• Wastewater Treatment Plant air quality permit
• Wastewater Treatment Plant 1200Z permit (2018)

Related links

• Mercury Minimization Plan
• Gresham Revised Code
• Gresham Community Development Code

Gresham Water Pollution Control Facility (WPCF) permit

Underground Injection Control (UIC) management plan 2012-2022

Stormwater monitoring plan plus appendix A and B and appendices C through F

Underground Injection Control (UIC) system-wide assessment 2012

Underground Injection Control (UIC) technical memoranda 2012

Retrofit strategy and plan

• Fairview Creek master plan
• Johnson Creek master plan
• Kelly Creek master plan
• West Gresham master plan

Capital Improvement Program