Dead Pike Lake Management Plan Final Report Natural Resource Board - - PowerPoint PPT Presentation

Dead Pike Lake Management Plan Final Report

Natural Resource Board April 11, 2018

AGENDA ITEM 4.B.2. Dan Helsel, Field Integration Leader Steve Apfelbaum, Chairman, Applied Ecological Service

Dead Pike Lake, Vilas County

AGENDA ITEM 4.B.2.

Dan Helsel (DNR) & Steve Apfelbaum (AES)

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Foundation

December 2016: NRB Amendment to Powell Marsh Approval:

• Mr. Zimmer MOVED, seconded by Dr. Prehn, to amend the motion to direct the department to

continue working with Dead Pike Lake Association to evaluate the conditions of Dead Pike Lake and develop a lake management plan to address water quality concerns. He asked that the department report back to the Natural Resources Board at the September 2017 meeting, which will be held in Minocqua, regarding progress on the lake management plan, including providing any water quality monitoring updates. Further, he would like the department to present an informational item on the finalized lake management plan by March 2018.

April 2018: DNR Approved Lake Management Plan

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AGENDA ITEM 4.B.2.

Dan Helsel (DNR) & Steve Apfelbaum (AES)

Developing the Plan

• Monthly meetings January 2017 – March 2018
• Association, Town & DNR
• ~ $20,000 surface water quality monitoring
• ~ $75,000 Contract with Applied Ecological Services
• Field and technical assistance from Lake

Association, Town, AES, DNR Wildlife, DNR Water Quality, DNR Groundwater, UW-Trout Lake, and USGS

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AGENDA ITEM 4.B.2.

Dan Helsel (DNR) & Steve Apfelbaum (AES)

Water Quality Framework

Groundwater

• Naturally high in iron and

phosphorus ~ 85% of iron load and ~ 65% of the phosphorus load

• Lower lake levels causes

increased groundwater inflow

• Raising the minimum lake

level decreases groundwater iron and phosphorus input

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AGENDA ITEM 4.B.2.

Dan Helsel (DNR) & Steve Apfelbaum (AES)

Water Quality Framework

Surface Water

• Powell Marsh State Wildlife Area

ditches increase the connection between groundwater and surface water

• Source of iron and phosphorus

to Dead Pike Lake ~ 15% of iron load and ~ 35% of the phosphorus load

• Iron and phosphorus are

transported with organic matter

• Biofiltration of inflow will

decrease iron and phosphorus inputs

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AGENDA ITEM 4.B.2.

Dan Helsel (DNR) & Steve Apfelbaum (AES)

Biological and Recreational Impacts

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AGENDA ITEM 4.B.2.

Dan Helsel (DNR) & Steve Apfelbaum (AES)

Dead Pike Lake Water Quality Goals

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Water Quality Parameter Reduction Goal Existing Condition Goal Phosphorus Phosphorus Load 12% 16% 17 µg/L 206 kg/yr 15 µg/L 173 kg/L Iron In-Lake Iron Inflow Iron Load 20% 58% 50% 1.2 mg/L 3.5 mg/L 53,222 kg/yr 1.00 mg/L 1.49 mg/L 26,611 kg/yr Secchi Disk 24% increase in clarity 6.88 feet 8.40 feet Chlorophyll -a Meets goal 4 µg/L < 4 µg/L

AGENDA ITEM 4.B.2.

Dan Helsel (DNR) & Steve Apfelbaum (AES)

Lake Management Action

• Raise bottom stream

elevation up to 1 foot

• Maximum lake level lower

than ordinary high water mark

• Reversible, temporary

structure

• Maintain high flow capacity
• Monitor visible iron floc

accumulation, flows, lake elevations

• Evaluate and adapt

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Raise the Minimum Lake Elevation

AGENDA ITEM 4.B.2.

Dan Helsel (DNR) & Steve Apfelbaum (AES)

Lake Management Action

• Initially use north-south

ditch without stream history

• Construction activities

within artificial ditch

• Compatible with PMSWA

Master Plan

• Maintain minimum flow

requirements

• Reversible construction
• Monitor transparency

phosphorus, iron and flows

• Evaluate and Adapt

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Construct Inflow Biofiltration System

AGENDA ITEM 4.B.2.

Dan Helsel (DNR) & Steve Apfelbaum (AES)

Lake Management Actions

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AGENDA ITEM 4.B.2.

Dan Helsel (DNR) & Steve Apfelbaum (AES)

Lake Planning Grant Objectives

• Near Term

– Conceptual Outlet Plans – Conceptual Inflow Biofiltration Plans – Supplemental Data Collection – In-lake Habitat Evaluation

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AGENDA ITEM 4.B.2.

Dan Helsel (DNR) & Steve Apfelbaum (AES)

Implementation Steps

• Long Term

– Funding Package – Permitting – Construction – Evaluation Monitoring

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AGENDA ITEM 4.B.2.

Dan Helsel (DNR) & Steve Apfelbaum (AES)

Conceptual Timeline

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AGENDA ITEM 4.B.2.

Dan Helsel (DNR) & Steve Apfelbaum (AES)

Questions

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AGENDA ITEM 4.B.2.

Dan Helsel (DNR) & Steve Apfelbaum (AES)