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CE 341: Introduction to Environmental Engineering
Homework #10: “Design Your Study” Part I
Due: 11/3/16 by 2pm
Place in my mailbox (West 134G) or Email to: jillian.cadwell@tricity.wsu.edu
· Problem Background : The only uranium mining in Washington State was by Newmont Mining who mined on the Spokane Indian Reservation (Sherwood Uranium Mine and the Midnite Uranium Mine). Among Newmont Mining's many holdings, its majority interest in the Dawn Mining Company, which until 1981 operated the Midnite Mine on the Spokane Indian Reservation. The open-pit uranium mine is the source of radiation and heavy metal contamination of Blue Creek, which flows into the Spokane River arm of Lake Roosevelt.
· “Zone of White Death” : Ecological stresses from metal oxide deposition, pH, and Zinc are common downstream of mine sites. Aluminum oxide can cover ecosystems with a white coating, which has varying impacts at different trophic levels.
· Remediation Goal : Reduce metal oxide deposition by 80% and maintain pH between 6.5 and 8.5. Restore ecosystem function to a “pristine” level within 5 years.
· Design a remediation plan that addresses the following :
· Purpose of plan (e.g. assess water quality, macroinvertebrate dynamics, etc.)
· Summarize initial study (from HW #9)
· Key biological/chemical/physical parameters
· Describe Site Assessment Plan
· What information must you know before deciding on remediation techniques?
· Other issues…
· Describe Remediation + Monitoring Plan
· Remediation Method (may want to do a book or internet search for remediation methods used in the field)
· Include any drawings/schematics
· Short-term and Long-term Monitoring (may want to do a book or internet search for monitoring plans that have been used in similar situations)
· Overall Project Timeline
Reading Assignment:
Please read the articles and reports included in “HW 10 Mine Articles” located on Blackboard under “Other Course Documents.”
Written Assignment:
I am an environmental engineering consulting firm looking to hire you as a consultant. Provide me with a 3-5 page written response in report format that addresses the remediation plan elements above. Please include an introduction (with background info) and conclusions in your report. Use diagrams, tables and figures as you see fit. Be sure to properly cite your sources.
Note: ABET-Accreditation Student Learning Outcomes for this assignment include: