Description: This report presents the final form of the Washington State highway runoff pollutant loading model, incorporating data from the five years of study. It also features a probabilistic analysis of concentration and loading data designed to express the chance of exceeding specific values in a given case. Other topics include further assessment of the toxicity of highway runoff and its causes and mitigation.

Full Report (pdf 0.93 MB)

• Date Published: April, 1983
• Publication Number: WA-RD 39.12.1
• Last Modified: October 21, 2007
• Authors: Lys M. LIttle, Richard R. Horner, Brian W. Mar.
• Originator: University of Washington. Environmental Engineering and Science Program.
• # of Pages: 51 p., 956 KB (PDF)
• Subject: Drainage, Environmental impacts, Heavy metals, Mathematical models, Pollutants, Probability, Runoff, Toxicity, Water pollution, Water quality, Vegetation, Zinc.
• Keywords: Highway runoff, mitigation, model, pollutant loading, stormwater, toxicity, Washington (State)
• Related Publications: Water Quality Impacts Associated with Leachates from Highway Woodwastes Embankments, (WA-RD 39.1).
  Effects of Velocity and Nutrient Alterations on Stream Primary Producers and Associated Organisms, (WA-RD 39.2).
  Highway Runoff Monitoring: The Initial Year, (WA-RD 39.3).
  Composite Sampling of Highway Runoff: Year 2, (WA-RD 39.4).
  Criteria and Requirements for Statewide Highway Runoff Monitoring Sites, (WA-RD 39.5).
  Characterization of Highway Runoff in Washington State, (WA-RD 39.6).
  Year 3 - Runoff Water Quality, August 1979 - August 1980, (WA-RD 39.7).
  Views of Risk and Highway Transportation of Hazardous Materials - A Case Study in Gasoline, (WA-RD 39.8).
  A Survey of Trace Organics in Highway Runoff in Seattle, Washington, (WA-RD 39.9).
  Transport Deposition and Control of Heavy Metals in Highway Runoff, (WA-RD 39.10).
  Effects of Seattle Area Highway Stormwater Runoff on Aquatic Biota, (WA-RD 39.11).
  Highway Runoff in Washington State: Model Validation and Statistical Analysis, (WA-RD 39.12).
  Year 4, Runoff Water Quality, August 1980-August 1981, (WA-RD 39.13).
  Guide for Water Quality Impact Assessment of Highway Operations and Maintenance, (WA-RD 39.14).
  Impacts of Channel Reconstruction in the Pilchuck River, (WA-RD 39.15).
  Summary -- Highway Runoff Water Quality Study, 1977-1982, (WA-RD 39.16).

This abstract was last modified April 29, 2008