Simple Registration

When:  Jul 18, 2024 from 11:30 AM to 01:00 PM (PT)
Community:   Western Chapter

When & Where

Online Instructions:
Login: Register for the event and watch your email for the link to join the live session 24 hours before the live event. If you do not receive the link within 24 hours of the live event, please contact us at, 530 320-9631.

Jul 18, 11:30 AM - 01:00 PM (PT)


Instructor: Craig Benson, IECA 2023 Speaker of the Year
Faculty: Cal Poly Humboldt
 Craig Benson in the field
Length: 90 minutes 1.5 PDHs*
DATE: Thursday, July 18, 11:30 am–1:00 pm
Webinar Summary
This intermediate-level webinar is your opportunity to learn how to develop and implement total maximum daily loads (TMDLs) for sediment and turbidity. The webinar will employ two contrasting case studies of TMDLs developed for salmon-bearing streams on California's North Coast.
Learning Objectives:
  1. Describe the basic planning steps in developing a sediment and turbidity TMDL, with particular emphasis on conducting the sediment source analysis to determine natural background sediment from anthropogenic or management-related sediment.
  2. List tiers and categories of BMPs appropriate for sediment and turbidity TMDLs at the watershed scale for the State Water Resources Control Board and the site scale consistent with the CA CGP.
  3. Name several approaches to TMDL compliance monitoring and how to tailor the approach for a particular 303d water quality-impaired watershed.
Webinar Description: Watersheds make and are made by erosional processes on the land. Riverine systems derive multiple benefits from natural episodic sediment delivery, while chronic anthropogenic (management-related) sedimentation can negatively impact watershed health, aquatic species, and water quality. Total Maximum Daily Loads (TMDLs) set a threshold for the amount of a particular pollutant, like sediment and turbidity, that can be delivered to a river system without impairing the "beneficial uses" of the waters. 
Tens of thousands of fish dead after California wildfire washes debris into river
Tens of thousands of fish dead after California wildfire washes debris into river
Participants in this webinar will learn about the TMDL process, from listing a watershed as impaired to performing a sediment source analysis to determine what can be considered natural "background" sediments and what are "management-related" sediments to developing BMPs for the land practices contributing sediment. This will include watershed-scale practices to move the entire watershed towards water quality recovery and site-scale BMPs meeting the requirements of the CA CGP.
The course will highlight two ground-breaking TMDL case studies in Northern California, including 1) the Mad River TMDL, which was set forth by the Federal EPA for the entire watershed, and the Mad River TMDL Compliance Plan, which was developed through a landowner-based process guided by a local non-profit agency; and 2) the Elk River TMDL and TMDL Compliance Plan, which were set forth by the CA Regional Water Quality Control Board for a partitioned reach of the watershed. 

Can't Attend? We've got you covered.  The webinar will be recorded, and registrants will receive the link after the event.

More about the presenter - Craig Benson has been an avid researcher, applied scientist, and contractor in a wide variety of watershed-scale to site-scale rehabilitation, reclamation, remediation, and restoration efforts in the U.S., Latin America, and West Africa. 2023 marks Craig's 40th year in practice with over 400 projects under his belt. Niels Bohr says "An expert is a person who has made every mistake in a given field". If one adds "...and learned from them" to the quote, then Craig has shared his "expertise" at the last ten IECA conferences. Through his career Craig's work has spanned the gov't sector, academia, both the private consulting and contracting world, the non-profit/NGO sector and working with Indigenous Communities. Hence, he brings perspective from a broad range of approaches and operating cultures.

*NOTE: PDHs are currently accepted by Ecopliant (CISEC). We are working on getting approval from Envirocert (ECI) for CPESCs.



registration type


Contact Information

Cyndi Brinkhurst

530 320-9631