Hydroikos Ltd.
      Services  |  Resumes  |  Project Experience  |  Publications  |  Home
 
      Services
Wetland Restoration Planning and Design
  • Measuring tide heights, and deriving local tidal datums
  • Modeling tidal circulation in muted tidal wetlands and estuaries
  • Measuring and modeling sediment accumulation in wetlands
  • Developing geomorphic relationships for use in channel design
Watershed Analysis from a Water Quality Perspective
  • Monitoring water quality and stream discharge, and estimating constituent loads and discharge-concentration relationships;
  • Prescribing treatment approaches and designing wetlands for treatment of urban runoff;
  • Preparing Watershed Sanitary Surveys, pursuant to the California Surface Water Treatment Regulation.
Environmental Impact Assessment and Review
  • Evaluating watershed impacts of Timber Harvest Plans
  • Evaluating impacts of wetland creation and dredged material disposal alternatives
  • Evaluating hydrologic and water quality impacts of agriculture urbanization and strip mining.
Jurisdictional Determination and Permitting
  • Determining the limits of wetland jurisdiction, under Sec. 404 of the Clean Water Act
  • Preparing Joint Aquatic Resource Permit Applications (JARPA) for projects in the Bay Area
  • Helping clients deal with sensitive and difficult enforcement issues
Expert Witness Testimony
  • We have testified in 10 cases, in both State and Federal courts, involving:
  • wetland jurisdiction · wetland contamination
  • water quality impacts of timber harvest, land development and industrial activity
  • causes of erosion and sedimentation

Wetland Restoration Planning and Design
We have many years of experience in the planning and detailed conceptual design of wetland restoration projects. This has included measurement of tide heights and derivation of local tidal datums, modeling of tidal circulation in muted tidal wetlands to predict modified tidal regimes, modeling the accumulation of fine sediment in marshes, and developing geomorphic relationships for use in channel design. We can produce designs at a level that permit easy translation to design drawings and specifications.

Environmental Impact Assessment and Review
Our impact assessment experience includes evaluating the hydrologic and sediment impacts of timber harvest plans, evaluating wetland creation and dredged material disposal alternatives, and evaluating the hydrologic and water quality impacts agriculture, urbanization and strip mining.

Jurisdictional Determination and Permitting
We have helped to identify the limits of wetland jurisdiction of EPA, and helped clients to obtain required permits, including wetland and water quality permits (under Sections 404 and 401 of the Clean Water Act), Lake or Streambed Alteration Agreements (under Section 1603 of the State Fish and Game Code), and BCDC permits for activities in the Shoreline Band around San Francisco Bay.

Expert Witness Testimony
We have testified in 9 cases involving wetland jurisdiction, wetland contamination, water quality impacts of land development, and causes of erosion and sedimentation.

Watershed Analysis from a Water Quality Perspective
Our experience and capabilities in this area include:
  • Watershed Sanitary Surveys, pursuant to the California Surface Water Treatment Regulation
  • Monitoring water quality and estimating constituent loads and discharge-concentration relationships
  • prescribing treatment approaches and designing wetlands for treatment of urban runoff.
Hydroikos Ltd.
2512 Ninth Street, Ste. 7
Berkeley, California 94710
510-295-4094
coats(at)hydroikos.com