Herrera worked with City staff and FCS group to evaluate the City’s Stormwater Management Program (SWMP), which included interviews with City staff, a staffing needs evaluation, field review of problem sites, hydrologic modeling, development of construction projects to solve stormwater programs, and calculation of funding needs to implement the SWMP for the 6-year planning horizon (2020 through 2025). This document represents the result of those efforts and is the first major revision of the City’s Stormwater Comprehensive Plan since the original 2013 plan. In addition

The Washington State Department of Ecology identified surface runoff as the most significant contributor of toxic chemicals to Puget Sound during earlier phases of the Puget Sound Toxics Loading Analysis. The objectives of the current study were to refine previous estimates of contaminant load contributions to Puget Sound via surface runoff by monitoring contaminant concentrations and discharge from four land uses: commercial/industrial, residential, agricultural, and forest/field/other. From 2009 to 2010, samples were collected from 16 streams in the Puyallup and

The goal of this study was to determine how effective are watershed rehabilitation efforts at improving receiving water conditions at the watershed scale? The study was designed with a 10-year timeframe, this report summarizes the data collected in year 3 of the study. Seven streams within the City of Redmond were monitored for flow, water quality, sediment quality, habitat, and B-IBI. Two of the streams are in a forested preserve and functioned as Reference watersheds, two streams are in highly impacted basins and served as Control basins, the remaining three streams

The SR 167 Completion Project is one of two large projects comprising WSDOT’s Puget Sound Gateway Program. The purpose of the Phase 1 Improvements is to improve regional mobility of the transportation system to serve multimodal local and port freight movement between the Puyallup termini of SR 167, SR 410, and SR 512, as well as the I-5 corridor, the SR 509 freeway, and the Port of Tacoma. The purpose of this report is to identify and describe wetlands and streams in the study area within Pierce County, Fife, and Milton. Wetland biologists evaluated field conditions by

A Stormwater Park in downtown Seattle, the Swale on Yale Project treats 190 million gallons of stormwater annually within the streetscape while also providing a gathering place and backdrop for life in a revitalized neighborhood in downtown Seattle. From 2015 to 2016 Herrera and Seattle Public Utilities (SPU) implemented an intensive water quality and quantity monitoring effort to assess the performance of one block of the four block swale project. The monitoring entailed continuous flow measurement of influent stormwater and treated effluent from the underdrain outlet