Stormwater Action Monitoring - Effectiveness studies

SAM's effectiveness studies measure the stormwater management actions in Western Washington and communicate useful findings on what works and what doesn't work. The Stormwater Work Group (SWG) organizes permittees and stakeholders to select the SAM study topics.

SAM Effectiveness Studies icon

The process for new projects

We are currently in the process of soliciting and assessing SAM Round 4 funding proposals. Successful SWG-approved studies will be funded during this current permit term, 2019 – 2024.

Project proponents submitted twelve letters of intent for effectiveness and source-identification studies or projects supporting implementation of the NPDES Phase I and Western Washington Phase II Municipal Stormwater permits. The letters of intent are linked in PDF format below. 

The Round 4 SAM request-for-proposal and review process  

This competitive funding process is open to any public agency that may legally enter into interagency agreements with us. We strongly encourage project proponents to form partnerships to address issues of common concern. There are five distinct stages to the SAM studies selection process. See the table below for the timing for each of these stages. 

SAM Request for Proposal schedule

Stage Description Due Date
1 Project proponent letter of intent due to SAM Coordinator. Feb. 28, 2023
1 (continued) SAM Coordinator provides feedback to project proponents and determines whether each proponent's project will move to Stage 2. March 31, 2023
2 Full proposal from project proponent due to SAM Coordinator. May 31, 2023
3 SAM staff coordinate for scoring and technical reviews. These are returned to project proponents. July 31, 2023
4 SAM Round 4 project-selection workshop features presentations by proponents and stakeholder voting. Late August 2023
5 SWG approves project list for SAM funding. Nov. 15, 2023

What are we learning?

SAM effectiveness projects can occur at site or regional scales and the results can be used across jurisdictions. 

Completed SAM effectiveness studies list