clear lake & beaver lake - skagit county, …...lmd overview and accomplishments 1 aquatic plant...

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Brazilian Elodea Photograph: Clayton Antieau INSIDE THIS ISSUE: LMD Overview and Accomplishments 1 Aquatic Plant Man- agement Program 2,3 2005 Clear Lake Diver Survey 4 LMD Reformation Survey 7 Eurasian Milfoil Survey Maps 5 Water Lily Control Aerial Photos 6 WINTER 2017 LAKE MANAGEMENT DISTRICT NO.4 NEWSLETTER SKAGIT COUNTY PUBLIC WORKS LAKE MANAGEMENT DISTRICT No. 4 Lake Management District Expires - 2017 The following information has been provided by Skagit County Public Works Department and the Advisory Committee for Lake Management District No. 4 (Clear Lake and Beaver Lake) with the intent of increasing public awareness and involvement related to lake management issues. CLEAR LAKE & CLEAR LAKE & BEAVER LAKE BEAVER LAKE Lake Management District No. 4 (LMD4) for Clear and Beaver Lakes is set to expire the end of 2017. LMD 4 has been in place since 2007 to nance the management of invasive and noxious aquaƟc plants in Clear and Beaver Lakes. The lakes were combined into one LMD because they are hydrologically connected, and invasive aquaƟc plants can easily get transported from one lake to the other. The overall goal of LMD 4 is to eradicate Eurasian milfoil from both Clear & Beaver Lakes, eradicate Brazilian elodea from Beaver Lake, prevent the spread of the noxious weeds to downstream water bodies during ood events, and control fragrant water lilies (Nymphaea odorata) in both lakes to facilitate increased access to the lake for recreaƟonal users. What is a Lake Management District? A Lake Management District (LMD) is a special assessment district formed by lake communiƟes who vote to charge themselves a special assessment to nance lake management acƟviƟes in accordance to RCW 36.61. In Skagit County LMDs are typically formed for a 10 year period. There are currently four LMDs in Skagit County: 1. Big Lake; 2. Lake McMurray; 3. Lakes Erie & Campbell; and 4. Clear & Beaver Lakes. Skagit County Public Works Department staprovides technical and administraƟve assistance to LMDs for the control of invasive and noxious aquaƟc weeds. Accomplishments 2007— 2016 Clear and Beaver Lakes have a long history of invasive aquaƟc weeds. Eurasian watermilfoil (Myriophyllum spicatum) was rst discovered in Clear Lake in 1994 and in Beaver Lake in 1999. Brazilian elodea (Egeria densa) was discovered in Beaver Lake in 2005. Accomplishments during the ten year duraƟon of LMD 4 include the following: Implemented the Integrated AquaƟc VegetaƟon Management Plan (IAVMP), a comprehensive guideline for managing Clear and Beaver Lakes. Provided a lake stewardship training workshop and installed invasive aquaƟc species signage at the boat launch. Eradicated Brazilian elodea in Beaver Lake. Eurasian watermilfoil has been greatly reduced in both Lakes. Now there are just a few plants that can be seasonally controlled. Fragrant water lilies have been greatly reduced by 20 acres. Noxious aquaƟc plants are no longer dominant or problemaƟc in either lake. NaƟve aquaƟc plants are starƟng to become problemaƟc in Clear Lake, but can be seasonally controlled as needed. Enclosed (pg 7) is a survey to help gage whether or not there is enough interest to reform LMD4. The reformaƟon process will take several months, involve at least two public hearings, and voƟng ballots mailed to property owners. LMD Reformation Survey

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Page 1: CLEAR LAKE & BEAVER LAKE - Skagit County, …...LMD Overview and Accomplishments 1 Aquatic Plant Man-agement Program 2,3 2005 Clear Lake Diver Survey 4 LMD Reformation Survey 7 Eurasian

Brazilian Elodea Photograph: Clayton Antieau

I N S I D E T H I S

I S S U E :

LMD Overview and

Accomplishments 1

Aquatic Plant Man-

agement Program

2,3

2005 Clear Lake Diver Survey

4

LMD Reformation

Survey

7

Eurasian Milfoil Survey Maps

5

Water Lily Control Aerial Photos

6

W I N T E R 2 0 1 7 L A K E M A N A G E M E N T D I S T R I C T N O . 4 N E W S L E T T E R

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No. 4

Lake Management District Expires - 2017

The following information has been provided by Skagit County Public Works Department and the Advisory Committee for Lake Management District No. 4 (Clear Lake and Beaver Lake) with the intent of increasing public awareness and involvement related to lake management issues.

CLEAR LAKE & CLEAR LAKE &

BEAVER LAKEBEAVER LAKE

Lake Management District No. 4 (LMD4) for Clear and Beaver Lakes is set to expire the end of 2017.  LMD 4 has been in place since 2007 to finance the management of invasive and noxious aqua c plants in Clear and Beaver Lakes.  The lakes were combined into one LMD because they are hydrologically connect‐ed, and invasive aqua c plants can easily get transported from one lake to the other.    The overall goal of LMD 4 is to eradicate Eura‐sian milfoil from both Clear & Beaver Lakes, eradicate Brazilian elodea from Beaver Lake, prevent the spread of the noxious weeds to downstream water bodies during flood events, and control fragrant water lilies (Nymphaea odorata) in both lakes to facilitate increased access to the lake for recrea onal users.   

 What is a Lake Management District? A Lake Management District (LMD) is a special assessment district formed by lake communi‐es who vote to charge themselves a special 

assessment to finance lake management ac v‐i es in accordance to RCW 36.61.  In Skagit County LMDs are typically formed for a 10 year period.  There are currently four LMDs in Skagit County: 1. Big Lake; 2. Lake McMurray; 3. Lakes Erie & Campbell; and 4. Clear & Bea‐ver Lakes.  Skagit County Public Works Depart‐ment staff provides technical and adminis‐tra ve assistance to LMDs for the control of invasive and noxious aqua c weeds.  

Accomplishments 2007— 2016 Clear and Beaver Lakes have a long history of invasive aqua c weeds.  Eurasian watermilfoil (Myriophyllum spicatum) was first discovered in Clear Lake in 1994 and in Beaver Lake in 1999. Brazilian elodea (Egeria densa) was dis‐covered in Beaver Lake in 2005.  Accomplish‐ments during the ten year dura on of LMD 4 include the following:  Implemented the Integrated Aqua c Vege‐ta on Management Plan (IAVMP), a com‐prehensive guideline for managing Clear and Beaver Lakes.  

Provided a lake stewardship training work‐shop and installed invasive aqua c species signage at the boat launch. 

Eradicated Brazilian elodea in Beaver Lake.  Eurasian watermilfoil has been greatly re‐duced in both Lakes.  Now there are just a few plants that can be seasonally con‐trolled.  

Fragrant water lilies have been greatly re‐duced by 20 acres.      

Noxious aqua c plants are no longer domi‐nant or problema c in either lake.   

Na ve aqua c plants are star ng to be‐come problema c in Clear Lake, but can be seasonally controlled as needed.  

Enclosed (pg 7) is a survey to help gage whether or not there is enough interest to reform LMD4.  The reforma on process will take several months, involve at least two pub‐lic hearings, and vo ng ballots mailed to property owners.  

LMD Reformation Survey

Page 2: CLEAR LAKE & BEAVER LAKE - Skagit County, …...LMD Overview and Accomplishments 1 Aquatic Plant Man-agement Program 2,3 2005 Clear Lake Diver Survey 4 LMD Reformation Survey 7 Eurasian

P A G E 2 Clear Lake & Beaver Lake Newsletter Winter 2017

C L E A R L A K E & B E A V E R L A K E

A licensed contractor conducts the following lake maintenance ac vi es for the LMDs each year:    Pre‐Treatment Survey: iden fy and map noxious and problema c aqua c plant species that need to be controlled.   

Herbicide Treatments: strict guidelines are followed when applying aqua c herb‐icides.  Treatment no ces are mailed to property owners and posted on docks, shorelines, boat launches and swimming areas. No ces iden fy herbicides applied and any water use restric ons.  

Post‐Treatment Survey: monitor the effec veness of the applied plant man‐agement techniques and look for new growth of invasive or problema c aqua c plants. Determine if follow‐up treatments are necessary. 

Annual Report: includes a map of plant growth and areas treated, summary of lake maintenance ac vi es and recom‐menda ons for the following year. Re‐ports can be found on the County web‐site:  h p://www.skagitcounty.net/Departments/PublicWorksSurfaceWaterManagement/clearlake.htm 

 

LMD 4 Citizen Advisory Committee LMD 4 has a ci zen advisory commi ee composed of volunteers 

who reflect various user interests and geographic distribu on 

within the boundaries of the LMD.  The Commi ee works in co‐

opera on with County staff, to provide ci zen input on manage‐

ment decisions within the context of the LMD charter. The com‐

mi ee meets annually, or as o en as needed, to review the pro‐

gram’s progress, track the budget, and develop and approve 

work plans for managing the lake.  If you 

are interested in joining the Advisory 

Commi ee, or being more involved in 

your Lake Management District, contact 

Tracy Alker: [email protected]

Brian Adams 

Stan Buchanan 

Stephen Burgess 

Ron/Anita Davis 

Rob Janicki 

Mike Janicki 

Rita /Lee Johnson 

Rick/ Michelle VanPelt 

Ron Walt

Aquatic Plant Management Program Annual Lake  

Maintenance Ac vi es 

Why Manage Aqua c Plants? 

Aqua c plants are a cri cal component of a healthy lake. The plants provide food, dissolved oxygen and habitat for inverte‐brates, fish, and wildlife; prevent shoreline erosion; and improve water quality. A di‐verse healthy na ve plant community is also more resistant to invasion by oppor‐tunis c noxious weeds. Noxious weeds tend to spread more aggressively in a lake than na ve plants because they lack natu‐ral control mechanisms.  Occasionally, na‐ve plants can grow out of control too.  An 

overgrowth of aqua c plants can disrupt nature's delicate balance resul ng in: 

The loss of fish and wildlife habitat A safety hazard to swimmers and boaters by entanglement 

Degraded water quality from reduced dissolved oxygen levels and increased nutrient supply, sedimenta on, tem‐perature and pH 

Noxious Aqua c Weeds       

 

   

Na ve Aqua c Plants     

 

Vallisneria Americana

Potamogeton gramineus

Utricularia vulgaris

Potamogeton zosteriformis

Fragrant Waterlily (Nymphaea odorata) 

Elodea Canadensis

Potamageton amplifolius

Potamageton  robbinsii 

Eurasian  Watermilfoil (Myriophyllum spicatum) 

Brazilian elodea (Egeria densa)   

What can you do to reduce excessive aqua c plant and algae growth? Maintain your sep c system to reduce harmful bacteria and nutrients entering the lake.   

Reduce the use of fer lizers  

Plant na ve vegeta on along the shore-line 

Aqua c Plant ID Manual:   

www.ecy.wa.gov/programs/wq/plants/plan d2/index.html 

Nuphar poly-sepala

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P A G E 3 Clear Lake & Beaver Lake Newsletter Winter 2017

C L E A R L A K E & B E A V E R L A K E

Eurasian watermilfoil (Milfoil) is an invasive submerged aqua c plant species that can spread quickly forming large dense floa ng mats.  It primarily spreads by plant fragments that can be dispersed long distances by hitchhiking on boats, boat motors, boat trailers, and fishing equipment and can stay alive for weeks if kept moist.  It is extremely difficult to perma‐nently get rid of Milfoil.  In 2007, when LMD 4 was first established, Clear Lake was dominated by 76 acres Eurasian Milfoil.  Now, only a few single Milfoil plants have been found growing sporadically within dense stands of na ve plants in both Clear Lake and Beaver Lake.  Eurasian Milfoil no longer represents the most problema c species lake‐wide and can now be seasonally controlled with systemic or contact herbicides.  Systemic herbicides are applied when specifically targe ng Mil‐foil to kill the plants at the roots.  Contact herbicides are applied when controlling both Milfoil and problema c na ve aqua c plants at the same  me.  Contact herbicides do not kill the plants at the roots, but are the only op on for controlling both Milfoil and na ve aqua c plants at the same  me.  Lake condi ons can change from year to year so it is important to con nue monitoring and keep Eurasian Milfoil under control.   

Eurasian Milfoil  

Brazilian Elodea  

The Integrated Aqua c Vegeta on Management Plan (IAVMP) is a comprehensive planning document that evaluates and iden fies the most affordable and effec ve solu ons for controlling noxious aqua c weeds in Clear and Beaver Lakes while maintaining  a healthy ecological balance in the lakes and watershed.  The IAVMP is available on the Skagit County Website:  www.skagitcounty.net/Departments/PublicWorksSurfaceWaterManagement/clearlake.htm.   All aqua c herbicides that are applied are regulated under a permit issued by the Washington State Department of Ecology.  Certain herbicides can‐not be applied in Clear Lake un l a er July 15th due to the Washington Department of Fish and Wildlife’s fish  ming re‐stric ons when salmon are least likely present. For more informa on about the different methods and requirements for managing aqua c plants check out Ecology’s website: www.ecy.wa.gov/programs/wq/plants/plantmgmt.html.  

Fragrant Water Lily  

Aquatic Plant Management Program

Brazilian elodea is a prolific, non‐na ve aqua c plant that can crowd out na ve plants and inhib‐it recrea onal uses.  A small patch of it was first discovered in Beaver Lake in 2005 along the northwest shoreline. In 2006, divers  re‐moved the noxious plants by hand.  However, the plants were difficult to see due to poor visibil‐ity, and pulling the plants caused fragmenta on, making the prob‐lem worse.  In 2007,  the systemic herbicide Reward was applied, and appears to have completely eradi‐cated Brazilian elodea.   

Fragrant water lilies are floa ng leafed nox‐ious aqua c weeds that produce white or pink flowers and spread by rhizomes and seeds. The most effec ve way to control lilies is with a Glyphosate herbicide solu on sprayed di‐rectly on the lily pads. Treatments are per‐formed in the late summer when the pads are on the surface and producing flowers.  Visible effects occur within 3 to 4 weeks. Requests for no herbicide applica ons applied to lilies along some lakefront proper es have been respected.  When LMD 4 was first established, Clear Lake was dominated by 53 acres of fra‐grant water lily.  A er ten years of control, it is now re‐duced down to just 33 acres (a 20 acre reduc on).       

 Na ve Aqua c Plants  

Since 2012, dense stands of na ve aqua c plants have become prob‐lema c around some docks and shorelines, restric ng recrea onal use in Clear Lake.  Na ve plants are not targeted in Beaver Lake. Per permit restric ons, only contact herbicides can be applied and only 50% of the shoreline can be treat‐ed for na ve plant control. Contact herbicides do not kill the plants at the roots.  Annual spring surveys  help determine whether or not na ve plant control might be need‐ed. It is important to con nue maintaining a healthy balance of na ve aqua c plants in Clear Lake.     

Integrated Aqua c Vegeta on Management Plan 

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Fragrant Water Lilies Fragrant Water Lilies ‐‐    20052005  

Eurasian Milfoil Eurasian Milfoil ‐‐  20052005  

P A G E 4

2005 Clear Lake Diver Survey  2005 Clear Lake Diver Survey    ((Prior to Implemen ng the Lake Management District ProgramPrior to Implemen ng the Lake Management District Program))  

Clear Lake & Beaver Lake Newsletter Winter 2017

C L E A R L A K E & B E A V E R L A K E

Page 5: CLEAR LAKE & BEAVER LAKE - Skagit County, …...LMD Overview and Accomplishments 1 Aquatic Plant Man-agement Program 2,3 2005 Clear Lake Diver Survey 4 LMD Reformation Survey 7 Eurasian

Clear & Beaver Lakes Eurasian Milfoil — 2007

Clear Lake Eurasian Milfoil — 2016

P A G E 5

White Dots —indicate Milfoil plants and treat‐ment loca ons.  Only a few Milfoil plants remain.  Red areas indicate maximum plant biomass occupying the en re water column.   Blue areas indi‐cate no plant bio‐mass.  Green areas indi‐cate 50% plant biomass coverage.   

Milfoil  & Na ve Plant Treatment 

Loca ons 

Clear Lake & Beaver Lake Newsletter Winter 2017

C L E A R L A K E & B E A V E R L A K E

Red areas indicate Eur‐asian Milfoil loca ons  *75 acres of Milfoil  Green areas indicate Fra‐grant Water Lily loca‐ons 

 *53 acres of fragrant wa‐ter lilies 

Page 6: CLEAR LAKE & BEAVER LAKE - Skagit County, …...LMD Overview and Accomplishments 1 Aquatic Plant Man-agement Program 2,3 2005 Clear Lake Diver Survey 4 LMD Reformation Survey 7 Eurasian

Clear Lake Fragrant Water Lily Control Progress 2007—2015 (Lilies have been reduced by 20 acres) 

P A G E 6 Clear Lake & Beaver Lake Newsletter Winter 2017

C L E A R L A K E & B E A V E R L A K E