Watershed Documents and Forms

Stormwater Management Manual documents 

The City is currently revising our Stormwater Management Manual. A summary of the proposed changes is included just after the table of contents. 

Draft requirements:

The following draft documents are available for public review until September 30, 2024. Questions or comments can be submitted to Torrey Lindbo.

• 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)

Current requirements:

The following documents are effective on January 1, 2023 and include minor revisions 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

2024

Surface Water and Non-Point Source TMDL program summary

2023

Surface Water and Non-Point Source TMDL program summary

2022

Surface Water and NonPoint Source TMDL program summary

2021

Surface Water and NonPoint Source TMDL program summary

2020

Surface Water and NonPoint Source TMDL program summary

2019

Surface Water and NonPoint Source TMDL program summary

• 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 2021-26
• Gresham stormwater management plan
• Gresham and Fairview environmental monitoring plan 2022
• Monitoring plan appendices

Total Maximum Daily Load (TMDL) plan and associated documents

• Gresham TMDL plan (2023-2028)
• NPDES Wastewater permit
• Wastewater Treatment Plant air quality permit
• Wastewater Treatment Plant 1200Z permit

Related links

• Transportation winter operations management plan
• Gresham Revised Code
• Gresham Development Code

Gresham Water Pollution Control Facility (WPCF) permit

Underground Injection Control (UIC) management plan 2022-2032

Environmental monitoring plan 2022 and monitoring plan appendices

Underground Injection Control (UIC) system-wide assessment map 2022

Underground Injection Control (UIC) emerging pollutant evaluation 2022

• Stormwater Master Plan
• Appendix A1: Kelly Creek (Modeled capacity deficiencies)
• Appendix A2: West Gresham
• Appendix A3: Johnson Creek
• Appendix B: Hydrologic inputs and results tables
• Appendix C: Hydraulic results tables
• Appendix D: List of medium and low priority capacity deficiencies
• Appendix E: CIP fact sheets / existing city
• Appendix E: Springwater
• Appendix E: Pleasant Valley
• Appendix F: Unit cost tables

Review all of our Water Services Master Plans. 

Capital Improvement Program