Stillaguamish TAG Presentation Loren Brokaw, WDFW Restoration - - PowerPoint PPT Presentation

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Stillaguamish TAG Presentation Loren Brokaw, WDFW Restoration - - PowerPoint PPT Presentation

Stillaguamish TAG Presentation Loren Brokaw, WDFW Restoration Coordinator Doug Hennick, WDFW Watershed Steward I. Project Background / Summary II. Groundwater Report III. Moving Forward 2004 - SRFB funded DU (project


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SLIDE 1

Stillaguamish TAG Presentation

  • Loren Brokaw, WDFW Restoration Coordinator
  • Doug Hennick, WDFW Watershed Steward
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SLIDE 2
  • I. Project Background / Summary
  • II. Groundwater Report
  • III. Moving Forward
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SLIDE 3
  • 2004 - SRFB funded DU (project proponent) to design,

permit, and construction of levee setback project. ($569k) 2007 - SRFB cost increase to account for construction

  • 2007 - SRFB cost increase to account for construction
  • f final design. ($98k)
  • Proposed Construction to commence 2008.
  • Restore approximately 115 acres of estuarine

intertidal vegetated wetlands, 72 acres of freshwater wetland habitat on the Leque Island Wildlife Area.

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SLIDE 4
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SLIDE 5
  • Project Delays and Amendments:
  • 2008 – DU submits streamlined HPA

2009 Farm Bureau contests use of streamlined

  • 2009 Farm Bureau contests use of streamlined

process

  • 2010 DU submits full permit package and fees to
  • Sno. Co.
  • Groundwater contamination concerns led to EPA

requiring approved groundwater study

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SLIDE 6
  • 2011 SRFB amends DU award to include 12

month EPA approved study completed by PGG Nov 2011 – Sept 2012: Study implemented,

  • Nov 2011 – Sept 2012: Study implemented,

data collected

  • Final report: Submitted to EPA and technical

review team in December 2012

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SLIDE 7
  • EPA is reviewing Groundwater Report to

determine if it satisfies requirements

  • Groundwater Report disseminated to
  • Groundwater Report disseminated to

stakeholder group in December

  • Determination expected by January 31
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SLIDE 8
  • Study, modeling, and report completed by

Pacific Groundwater Group

  • Probes collected data in 8 drilled wells and 3
  • Probes collected data in 8 drilled wells and 3

existing private wells in study area between Leque and Camano.

  • Monitored groundwater flow direction and

water quality

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SLIDE 9
  • Groundwater flow currently is from Camano

towards Leque.

  • Groundwater and surface water in study area
  • Groundwater and surface water in study area

are currently brackish -- similar salinity range to Port Susan and Skagit Bays.

  • Seawater recharge during inundation
  • Evapotranspiration of shallow

groundwater

  • Deposition of salt spray
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SLIDE 10
  • Post-inundation salinity will be the same.
  • With inundation, two changes:
  • Increased recharge of groundwater with
  • Increased recharge of groundwater with

average 5 hours inundation/day

  • Increased surface water drainage efficiency

as channels are developed.

  • Big Question: Will those two factors cause

reversal of groundwater flow direction?

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SLIDE 11
  • Ran 2-D model to determine potential rise in

groundwater level

  • Level could rise as much as 1 foot
  • Ran 3-D model to determine if 1 foot rise could

cause reversal of flow direction

  • 4 iterations run, all showed no potential

for reversal.

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SLIDE 12

New Developments present opportunity to address Constraints:

Constraint #1: Concern over impacting sole source aquifer New Development: Groundwater Study Constraint #2: Concern over conversion of farmland New Development: Draft Sustainable Lands Strategy

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Constraint #3: Need to build setback dike to protect SR532 New Development: WSDOT on schedule to raise and widen highway this Summer.

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SLIDE 14

Constraint #4: Opposition from stakeholders results in delays. New Development: WDFW is beginning round of initial

  • utreach in February, prior to drafting design alternatives.

Constraint #5: Existing funding expires this Spring. New Development: Drafting of alternatives, outreach, selection of preferred alternative, and 60% design of preferred alternative included in ESRP proposal.

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SLIDE 15

Long Term Timeline

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SLIDE 16

QUESTIONS ?