Mark Woyshner, M.S.Eng., Hydrology/Hydrogeology, Principal
Mark Woyshner has over 24 years of innovative consulting experience, emphasizing field and modeling investigations in ground-water resources, sedimentation, habitat hydrogeology, 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




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


  • Brown, S., Hecht, B., and Woyshner, M., 2004, Sources and pathways of ground-water flow to canyon streams and implications for channel-habitat mitigation as inferred from variability of dry-season baseflow conditions, Carmel River watershed, California [abs.]: Groundwater Resources Association, Annual Meeting, 13th, Rohnert Park, California, September 23-24, 2004.


  • 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.


  • 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 ste, Falconbridge, Ontario: Proceedings of Sudbury 95 - Mining and the Environment, v. 2, June, 1995, Sudbury, Ontario, Canada p. 785 - 793.


  • 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.
  • 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.


  • 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.


  • 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.


  • Hecht, B., and Woyshner, M., 1991, Natural restoration of normal bed conditions for steelhead spawning and rearing - Corralitos and Browns Creeks, Santa Cruz County, California: Annual California Salmon, Steelhead and Trout Restoration Conference, 9th, Santa Cruz Califorina, February 22-24, 1991, p. 24-25.


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


  • Woyshner, M.,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., 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.


  • Hecht, B., and Woyshner, M., 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.