C.3 WORKSHOPS & CONFERENCES

C.3 Annual Training for Provision C.3 Compliance, hybrid webinar and in-person (Walnut Creek), April 28, 2025

• C.3 Workshop Flyer (PDF)

• Agenda 4-28-25 (PDF)

• Main Presentation Slides 4-28-25 (PDF)
• Panel Discussion Slides – Optimal GI Plant Palette (PDF)

• C.3 Workshop -Zoom Recording

C.3 Annual Training for Provision C.3 Compliance, hybrid webinar and in-person (San Ramon), June 5, 2024

• Agenda (PDF)

• New IMP Calculator Activity Sheet (PDF) – For this activity, you will need to download the latest IMP Sizing Calculator from our C.3 Guidebook page here.

• Presentation Slides (PDF)

Workshop Recordings (via Zoom)

• Part 1
• Part 2 (after the lunch break)

If you would like a certificate of completion for attending this workshop, please email your name and agency to cleanwater@pw.cccounty.us.

“C.3 Annual Training,” presentation at CCCWP Annual Training Workshop for Provision C.3 Compliance, May 31, 2023

• Workshop Recording

• Agenda (PDF)

• Presentation Slides (PDF)

“Changes to Municipal Regional Stormwater Permit, Provision C.3,” presentation at Planning Directors Meeting July 8, 2022

• Presentation Slides (PDF)

“Planning, Design, Construction, and Maintenance of Low Impact Development Features and Facilities,” webinar, May 24, 2022

• Agenda (PDF)

• Presentation Slides (PDF)

“Planning, Design, Construction, and Maintenance of Low Impact Development Features and Facilities,” webinar, May 11, 2021

• Agenda (PDF)

“Planning, Design, Construction, and Maintenance of Low Impact Development Features and Facilities,” February 11, 2020

• Agenda and Request for Feedback (PDF)

• Presentation Slides (PDF)

“Maintaining Green Infrastructure/Bioretention Facilities,” March 21, 2019

• Agenda and Request for Feedback (PDF)

• Presentation Slides: 
  • What is Green Infrastructure (PPTX) (Dan Cloak)
  • Presentation Slides: Building Blocks of Bioretention (PDF)(Megan Stromberg)
  • Presentation Slides: Preparation for Maintenance (PDF) (Megan Stromberg)
  • Presentation Slides: Debris Removal and Weeding (PDF) (Megan Stromberg)
  • Presentation Slides: Biotreatment Soil Mix and Mulch (PDF) (Megan Stromberg)
  • Presentation Slides: Plants and Irrigation in Bioretention (PDF) (Megan Stromberg)

• Field Walk Notes (PDF)

“Planning, Design & Construction of Low Impact Development Features and Facilities,” April 24, 2018

• Agenda (PDF)

• Presentation Slides (PDF)

“Low Impact Development Planning, Design, and Construction,” June 7, 2016

• Agenda (PDF)

• Presentation Slides (PDF)

“Low Impact Development Planning, Design, and Construction,” March 17, 2015

• Agenda (PDF)

• Presentation Slides:
  • Stormwater Control Plan Review and Bioretention Design (PDF)
  • LID Construction Inspection (PDF)
  • Bioretention Soil Testing Demonstration (PDF)

• Falling Head Test calculations (PDF)*

“Low Impact Development Planning, Design, and Construction,” June 12, 2014

• Agenda (PDF)

• Flyer (PDF)

• Presentation Slides (PDF)

“Implementing MRP Provision C.3 Requirements for Land Developments,” June 11, 2013

• Agenda (PDF)

• Presentation Slides (PDF)

“How to Prepare Stormwater Control Plans for Development Projects”, May 17, 2012

• Announcement Flyer (PDF)

• Agenda (PDF)

• Greeting (PDF)

• Background and Overview of Provision C.3, Stormwater Treatment, Hydromodification Management, and Low Impact Development (LID) (PDF)

• Analyzing a Site; Preparing and Documenting Your Conceptual Design (PDF)

• When and How to Evaluate the Feasibility of Harvesting and Reuse (PDF)

• Using the Stormwater C.3 Guidebook, Template, and IMP Sizing Calculator to Prepare Your Stormwater Control Plan (PDF)

• Bioretention: How to Get the Details Right (PDF)

Planning, Design, and Construction of Low Impact Development Facilities, May 23, 2011

• Agenda (PDF)
• Speaker Information (PDF)
• Workshop Flyer (PDF)
• New Requirements for Infiltration, Evapotranspiration, and Harvesting/(Re)Use: Where Are the Regulations Going? (PDF)
• Overview of New Content in the Stormwater C.3 Guidebook, 5th Edition (PDF)
• LID Other than Bioretention: Site Preservation, Permeable Pavements, Green Roofs, Dispersion to Landscape, and Harvesting/(Re)Use (PDF)
• Design Standards for Bioretention Facilities (PDF)
• Grading and Drainage Design for Bioretention (PDF)
• Geotechnical Constraints in Stormwater Infiltration Practice (PDF)
• Physical Properties of Bioretention Soils (PDF)
• Successful Plant Palettes for Bioretention (PDF)
• Putting it All Together: Analyzing a Project for LID and Documenting Compliance with LID Design (PDF)

• Photo Tour and Review of Contra Costa LID Sites (PDF)

IMP Sizing Calculator Workshop, October 29, 2009

• C.3 Guidebook review and update (PDF)

• Using the IMP Sizing Calculator (PDF)

• Example project sketch (PDF) (113KB .pdf)