Alternatives Evaluation For Willamette River TMDL
The City of Corvallis retained Kennedy/Jenks Consultants to complete a Total Maximum Daily Load (TMDL) Alternatives Evaluation for the Corvallis Wastewater Reclamation Plant (WWRP) discharge to the Willamette River. The purpose of the project is to evaluate long-term compliance with current National Pollutant Discharge Elimination System (NPDES) Permit limits, assess the economic impacts of current and potential future regulations, and evaluate alternatives to direct Willamette River discharge. The evaluation consists of two Technical Memoranda (TM):
TM 01 Regulatory Requirements and Treatment Costs – The first TM assesses current and future regulatory requirements, including the Willamette River TMDL, and summarizes potential economic impacts associated with continued long-term direct river discharge over a 50-year planning period.
TM 02 TMDL Alternatives Screening – The second TM evaluates alternatives outside of direct river discharge as a means of reducing the long-term costs and meeting regulatory requirements associated with the Willamette River TMDL and continued long-term direct river discharge in the summer months.
Download the Willamette River TMDL:
Technical Memorandum 1: Technical Requirements and Economic Impacts Evaluation
- List of Tables
- List of Figures
- List of Appendices
- List of Acronyms and Abbreviations
Section 2 - Current Regulatory Requirements
Section 3 - Emerging Regulatory Issues
Section 4 - Potential Economic Impacts of Current and Future Regulations
Section 5 - Conclusions and Recommendations
Technical Memorandum 2: TMDL Alternatives Evaluation
- List of Tables
- List of Figures
- List of Appendices
- List of Acronyms and Abbreviations
Section 1 - Introduction and Methodology
Section 2 - Inside UGB Water Recycling Alternatives
Section 3 - Outside UGB Water Recycling Alternatives
Section 4 - Combined Alternatives Evaluation
Section 5 - Conclusions and Recommendations
Appendices
Appendix A - Current NPDS Permit
Appendix B - Current Draft NPDS renewal Permit and Permit Evaluation Report
Appendix C - Oregon Water Quality Criteria Summary
Appendix D - Willamette River Ambient and WWRP Effluent Concentration Data
Appendix E - EPA Mixing Zone Memorandum
Appendix F - SAIC Report for Fish Consumption Rate Project
Appendix G - Current Recycled Water Rules
Appendix H - Treatment Wetland Feasibility Study
Appendix I - DEQ Subsurface Discharge IMD
Appendix J - Alternatives Screening Evaluation Methodology
Appendix K - Combined Alternative Triple Bottom Line Criteria
