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Salton Sea Species Conservation Habitat. Workshop • June 10, 2010. Meeting Purpose. Provide Stakeholders the opportunity to guide the direction of the SCH Project. Agenda. Introductions Goals and objectives Critical screening criteria Construction challenges.

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Presentation Transcript
meeting purpose
Meeting Purpose
  • Provide Stakeholders the opportunity to guide the direction of the SCH Project
agenda
Agenda
  • Introductions
  • Goals and objectives
  • Critical screening criteria
  • Construction challenges
introduction of presentation team
Introduction of Presentation Team
  • Rick Davis – Davis Group
  • Arturo Delgado – California Department of Fish and Game
  • Ramona Swenson – ENTRIX, Inc.
  • Rob Thomson – ENTRIX, Inc.
  • Vince Thompson – Ducks Unlimited
need for sch project
Need for SCH Project
  • Declining surface water elevation will lead to loss of Salton Sea habitat
  • Increasing salinity will lead to fishery collapse
  • Fishery collapse will result in loss of forage base for fish-eating birds
sch project purpose
SCH Project Purpose
  • SCH will provide conservation measures while the Legislature determines long-term action
  • Provides replacement for some near-term habitat losses as sea levels decline
  • Target: piscivorous bird species present in 2010 and dependent on the Sea for:
    • Foraging – fishery resources
    • Essential habitat components – foraging, nesting, roosting, loafing
    • Viability of a significant portion of their population
goals and objectives
Goals and Objectives
  • Goal 1: Develop a range of aquatic habitats that will support fish and wildlife species dependent on the Salton Sea
  • Objectives
    • Provide adequate foraging habitat for piscivorous (fish-eating) bird species
    • Develop habitats required to support piscivorous bird species
    • Support a sustainable, productive aquatic community
    • Provide suitable water quality for fish
    • Minimize adverse effects to desert pupfish
    • Minimize risk of selenium
    • Minimize risk of disease/toxicity impacts
goals and objectives9
Goals and Objectives
  • Goal 2: Develop and refine information needed to successfully manage the SCH Project through an adaptive management process
  • Objectives
    • Identify uncertainties in achieving the objectives
    • Design science-based means to test alternatives and reduce uncertainty
    • Develop and implement a monitoring plan
    • Develop a decision-making framework
    • Provide proof-of-concept for future restoration efforts
questions and feedback
Questions and Feedback

Goal 1:Develop a range of aquatic habitats that will support fish and wildlife species dependent on the Salton Sea

Goal 2:Develop and refine information needed to successfully manage the SCH Project through an adaptive management process

  • Do you agree with these goals and objectives?
  • Are we missing any others?
species conservation habitat project11

Species Conservation Habitat Project

Critical Screening Criteria

screening criteria
Screening Criteria

Two types of screening criteria

  • Exclusionary criteria
    • Factors essential to the successful completion of the SCH Project
  • Evaluative criteria
    • Factors considered in comparing Project components and alternatives
    • Not necessarily cause for elimination
      • Construction and operational costs
      • Environmental considerations
      • Other
critical screening criteria
Critical Screening Criteria
  • Exclusionary criteria used to begin refining the range of potential sites
  • Exclusionary criteria are
    • Adequate water supply (quantity, quality, and seasonal availability)
    • Available water rights
    • Available land
  • Three general locations being considered
questions and feedback18
Questions and Feedback
  • Are these the right criteria?
  • Are there others we should consider?
construction of sch ponds
Construction of SCH Ponds
  • Construction may occur in areas between -228 and -234 msl
    • Exposed playa with high groundwater
    • Shallow flooded areas
    • Water a few feet deep
potential site conditions
Potential Site Conditions
  • Examples of conditions that may be encountered during berm construction
    • Exposed moist but relatively firm soils
    • Shallow flooded relatively firm soils
    • Shallow flooded soft mucky soils
    • Water a few feet deep with soft or firm soils
  • Examples of water control structure installation
    • Localized dewatering
    • Structure support in soft soils
building berms on exposed playa
Building Berms on Exposed Playa

Example – Moist, relatively firm soils

  • Equipment
    • Low ground pressure tractors with carry-all scrapers
  • Method
    • Excavate, haul and place with the same piece of equipment
  • Haul distance
    • Short to Medium
  • Relative cost
    • Low
building berms in shallow water
Building Berms in Shallow Water

Example – Shallow water, relatively firm soils

  • Equipment
    • Excavators, low ground pressure dump trucks, bulldozers
  • Method
    • Excavate and load, haul with dump trucks, spread with dozers
  • Haul distance
    • Short to long
  • Relative Cost
    • High
building berms in shallow water28
Building Berms in Shallow Water

Example –Shallow water, soft mucky soils

  • Equipment
    • Amphibious excavators
  • Method
    • Excavate and drop
  • Haul distance
    • Adjacent
  • Relative Cost
    • High
building berms in deeper water
Building Berms in Deeper Water

Example – 2 feet of water, soft or firm soils

  • Equipment
    • Derrick barge with clamshell bucket
  • Method
    • Excavate and drop
  • Haul distance
    • Adjacent
  • Relative Cost
    • Medium
next step design considerations
Next Step – Design Considerations

Preliminary Geotechnical Investigation

  • Sample and test soils at potential project sites
    • Previous investigations have not sampled locations around the river deltas
  • Assess construction feasibility at potential sites

Preliminary Berm Stabilization Alternatives

  • Examples of design solutions to be considered
    • Source of embankment material
    • Dewatering
    • Base stabilization with geogrids
    • Berm stabilization with geotubes
questions and feedback40
Questions and Feedback
  • Are there other issues we should address?
contact information
Contact Information
  • DFG Contact:

Kim Nicol, Environmental Program ManagerCalifornia Department of Fish and Game78078 Country Club Drive, Suite 109Bermuda Dunes, CA 92203(760) 200-9178 [email protected]

  • USACE Contact:

Lanika Cervantes, Project ManagerSan Diego Section, Regulatory DivisionU.S. Army Corps of Engineers - Los Angeles District6010 Hidden Valley Road, Suite 105Carlsbad, CA 92011(760) 602-4838 [email protected]

sch project website
SCH Project Website

www.water.ca.gov/saltonsea

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