Mark Woyshner, M.S.Eng., Principal, Hydrogeologist/Hydrologist
Mark Woyshner has over 25 years of innovative field and modeling based consulting experience, emphasizing investigations in ground-water resources, stream flow sourcing and sediment transport, habitat hydrology, vadose-zone hydrology, coastal and alpine wetlands, water rights, and hydrogeology of tailings and mines.

• M.S. Civil Engineering and Applied Mechanics, McGill University, 1992
• Graduate Diploma in Ground Water, McGill University, 1990
• B.S. Forestry, University of California, Berkeley, 1979




  • de Berry, B., Woyshner, M., Porras, G., and Burck, A., 2008, The occurrence and environmental fate of pharmaceuticals and personal care products from treated wastewater percolation ponds, City of Ukiah, California: 21st Symposium Groundwater Resources Association of California, Emerging Contaminants, San Jose, California, November 2008. (pdf) (ppt)

  • Woyshner, M.R., Hecht, B., Yurovsy, T., and Irving, G.,2005, Spring-supported wetland and riparian habitat, a core for managing bedrock ground water: State of the San Francisco Estuary Conference, 7th Biennial, Oakland, California, October 2005. (pdf abstract)

  • Brown, S., Woyshner, M.R., and Hecht, B., 2004, Sources and pathways of ground-water flow to granitic canyon streams as inferred from variations in dry season baseflow, Carmel River watershed, California: Proceedings of the 13th Annual Groundwater Resources Association Meeting, September 23-24, 2004. (pdf abstract)

  • Woyshner, M.R., and Yanful, E.K., 1995, Modelling and field measurements of water percolation through an experimental soil cover on mine tailings: Canadian Geotechnical Journal, v. 32 p. 601 - 609. (pdf)

  • Woyshner, M.R., and St-Arnaud, L.C., and Wiseman, M.E., 1995, Neutralization potential and the porous envelope effect - two favorable conditions for decommissioning of the Fault Lake tailings site, Falconbridge, Ontario: Proceedings of Sudbury 95 - Mining and the Environment, v. 2, June, 1995, Sudbury, Ontario, Canada p. 785 - 793. (pdf)

  • Yanful, E K., AubĂ©, B.C., Woyshner, M.R., and St.-Arnaud, L.C., 1994, Field and laboratory performance of engineered covers on the Waite Amulet tailings: Proceedings of the International Land Reclamation and Mine Drainage Conference and Third International Conference on the Abatement of Acidic Drainage; U.S. Bureau Of Mines Special Publication SP 06B - 94, p. 138-147 (pdf)

  • Woyshner, M.R., 1994, Measurement of oxygen concentration gradients and calculation of gaseous oxygen transport into the mine tailings near Quebec 9 p. (pdf)

  • Woyshner, M.R., and St-Arnaud, L, 1994, Hydrogeological evaluation and water balance of a thickened tailings deposit near Timmins, Ontario, Canada: Proceedings of the International Land Reclamation and Mine Drainage Conference and Third International Conference on the Abatement of Acidic Drainage, U.S. Bureau Of Mines Special Publication SP 06B - 94, p. 198- 207. (pdf)

  • Wilson, G.W, Machibroda, R.T., Barbour, S.L., and Woyshner, M.R., 1993, Modelling of soil evaporation from waste disposal sites: Proceedings of the 1993 Joint CSCE-ASCE National Conference on Environmental Engineering, Montreal, Quebec, Canada, July 1993, p. 281 - 288. (pdf)

  • Yanful, E.K., Riley, M.D., Woyshner, M.R., and Duncan, J., 1993, Construction and monitoring of a composite soil cover for an experimental waste rock pile near Newcastle, New Brunswick, Canada: Canadian Geotechnical Journal, v.30, p. 588 - 599. (pdf)

  • Yanful, E.K., Bell, A.V., and Woyshner, M.R., 1993, Design of a composite soil cover for an experimental waste rock pile near Newcastle, New Brunswick, Canada: Canadian Geotechnical Journal, v. 30, p. 578 - 587. (pdf)

  • Woyshner, M.R., 1992, In-Situ vados-zone monitoring and hydrologic evaluation of sulfide-mine mill-tailings waste at Waite Amulet, Quebec; Graduate Thesis, Department of Civil Engineering, McGill University, Montreal, Quebec 227 p. (pdf)

  • Hecht, B., and Woyshner, M.R., 1991, Natural restoration of normal bed conditions for steelhead spawning and rearing - Corralitos and Browns Creeks, Santa Cruz County, California: The Ninth Annual California Salmon, Steelhead and Trout Restoration Conference, February 22-24, 1991, Santa Cruz, California, p. 24-25. (pdf)

  • Woyshner, M.R., and Hecht, B., 1988, Sediment, solute and nutrient transport from Squaw Creek, Truckee River basin, California: Proceedings of the Subalpine Montane Watersheds Symposium, June 9-10, 1988, Cal Neva Lodge. Lake Tahoe, Nevada, 32 p. + tables, figures (pdf)

  • Woyshner, M.R.,and Hecht, B., 1988, Effects of residential development on vernal pool hydrology: Excerpts from a poster session, Wetlands 88 Conference, Oakland, California, 3 p.

  • Hecht, B., and Woyshner, M.R, 1984, Storm hydrology and definition of sand-hill recharge areas Pajaro Basin Appendix E, 32 p.- in Hecht, B., Esmaili, H., and Johnson, N.M., 1984, Pajaro Basin Groundwater Management Study: HEA, a division of J.H. Kleinfelder Associates, consulting report prepared for Association of Monterey Bay Area Governments, 237 p. + 8 appendices. (pdf)

  • Hecht, B., and Woyshner, M.R., 1984, Effects of riparian woodlands on roughness and channel capacity of the Pajaro River near Watsonville, CA: Prepared for Harvey and Stanley Associates, January 1984, 38 p. + appendix. (pdf)