DLNA Lake Weed Discussion

It's our first public meeting in over two years!  The Devils Lake Neighborhood Association is hosting this open discussion related to the explosive growth of weeds (Elodea and Vallisneria) in Devils Lake this season.  We hope to begin shaping a strategy to help raise awareness with the owners of the lake, the State of Oregon. We also want to solicit ideas on how to best use our one and only resource at DLNA, that's you our friendly neighborhood residents.

WHEN
July 05, 2022 at 10:30am - 11:30pm
WHERE
Driftwood Library
801 SE Hwy 101 #201
Lincoln City, OR 97367

Google map and directions

New Elodea Removal Video

They say everything that needs fixing has a YouTube video to help you.  We created this short video to provide some guidance about harvesting Elodea around your property. This step by step overview should help in the successful hand harvesting of Elodea from a lake body. Care should be taken to ensure no loose fragments escape the work area.  Just click the image above to play, feel free to share this link with others.


Holiday Weekend Reminder 2022

We're excited, it's a triple whammy weekend that kick's off the month of July.  We begin with our seventh annual fireworks extravaganza on July 3rd,  next up is the boat parade on July 4th, and we finish with the first ever lake weed discussion at the Driftwood Library on July 5th.  Three for the price of one so don't miss out.  And yes we are still collection money for the 2022 fireworks, we have made it half way.  Thanks to all who have offered up their support.  If you haven't donated follow this link to join in and ensure we can continue this great tradition.  

Fireworks Show : July 03, 2022 at 09:30 PM

Boat Parade : July 04, 2022 at 04:00 PM

Weed Public Discussion :  July 05, 2022 at 10:30am - 11:30pm


Aquatic Plants - Elodea

It’s been a couple of years since we published Aquatic Plants 101 where we introduced you to Vallisneria americana, an aquatic plant that is native to coastal lakes.  At that time, Vallisneria was just becoming noticeable around Devils Lake.   This time of year, if you glance into the lake you most likely would not see any Vallisneria as its growing season has just begun; this plant is more of an issue in the late summer.  This time of year, you would likely see a thick carpet of another plant species Elodea which is considered a noxious weed in Oregon coastal lakes.  Elodea is one of the few pond plants that can remain green all winter long.

Elodea

According to Wikipedia, Elodea is a genus of 6 species of aquatic plants often called the water weeds. Elodea is native to the Americas and is also widely used as aquarium vegetation. An older name for this species is Anacharis.

Elodea, sometimes called American or Canadian water weed or pond weed, is widely known as the generic water weed. The American water weed lives entirely underwater with the exception of small white flowers which bloom at the surface and are attached to the plant by delicate stalks. It produces winter buds from the stem tips that overwinter on the lake bottom. It also often overwinters as an evergreen plant in mild climates. In the Autumn, leafy stalks will detach from the parent plant, float away, root, and start new plants. This is the American water weed's most important method of spreading, while seed production plays a relatively minor role.

This species has a wide ecological tolerance and grows relatively fast. Elodea can form dense mats which can interfere with recreational activities and navigation . In addition to this, the dense mats outcompete native plant species and therefore decrease the biodiversity in an area. It also accentuates the accumulation of finer organic silts which enhances its growth further as nutrients are released.

In Devils Lake, silty sediments and water rich in nutrients favor the growth of American water weed. These plants will grow in a wide range of conditions, from very shallow to deep water, and in many sediment types. It can even continue to grow uprooted, as floating fragments. 

Elodea is one of the most common aquatic plants in North America. In moderation the presence of Elodea in Devils Lake can also yield some benefits. It provides good habitat for many aquatic invertebrates and cover for young fish and amphibians. Waterfowl, especially ducks, as well as beaver, and otters eat this plant.  

 

Read more

Help Us Reach Our Goal

 

Fireworks.png

We are now in June and as many of you know we have a terrific day planned for you on July 3rd with a fantastic fireworks display followed on the 4th with our annual boat parade.  We have a long way to go to reach our fundraising goal.  Another $14,000 and we will have the show completely paid for, your help will be greatly appreciated.  If you were thinking of donating this would be a great time to help us get over the finish line.  Just click this link to contribute


Oregon DEQ 2022 Surface Water Report


Oregon’s 2022 Integrated Report on Surface Water Quality and List of Water Quality Limited Waters
 has been submitted to EPA for final approval.  You can find the submittal on DEQ’s website: https://www.oregon.gov/deq/wq/Pages/proposedIR.aspx 

The top four impairments statewide continue to be temperature, dissolved oxygen, impairment of the biological community (biocriteria) and E. coli. Impairments specific to Devils Lake include Dissolved Oxygen, pH, E.coli, Fecal Coliform, Chlorophyll-a and Harmful Algal Blooms.  Updated samples on Devils Lake included in this assessment were limited to Dissolved Oxygen, pH and E. coli.  

DEQ submitted its 2022 Integrated Report to EPA on May 23, 2022. The report is now considered “state final” and is awaiting EPA approval. The 2018/2020 Integrated Report remains in effect until EPA approval of the report. 

There are four tools to assist with review of the draft 2022 Integrated Report:

  • An interactive story map that provides an overview of the water quality assessment process and how to provide comments on the draft report.
  • An interactive web map application that displays the Integrated Report by overall status of an assessment unit. For assistance, see the web map instructions.
  • An on-line searchable database that provides parameter specific categorical assessment conclusions for all assessment units that have been assessed.
  • All GIS data is available through ArcGIS online web services 

 

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What Can I Do?

This time of year Elodea is the most prominent species of weed in Devils Lake. Elodea is a particularly injurious aquatic perennial. In North America, it has compromised water quality, and in some waterways has grown so abundantly that boat traffic is hindered, dissolved oxygen is reduced, and native fisheries are severely impacted. Elodea is also insidious, in that only a plant fragment is needed to infest a water body because it reproduces asexually.  So, what can you do to help solve this problem and how do you make sure your efforts do not make the problem worse?

DLWID Lake Treatments

The Devils Lake Water Improvement District (DLWID) began last season to actively attack the problem by treating areas of the shoreline where Parrot Feather, an extremely invasive plant, was growing.  Their efforts had significantly reduced the spread of the plant.  This year the District will attempt to tackle some of the plants that grow in the water column such as Vallisneria (Tape Grass) and Elodea (American Water Weed).

From currently available options, DLWID has determined that a systemic approach to herbicide application is the preferred method to prevent further spread of Elodea and Vallisneria in Devils Lake. Contact herbicides do not kill the root system of these perennial plants. Neither the District’s permit nor its budget will support lake wide herbicide application so for the time being these efforts should help curb growth but likely will not eradicate these weeds. Application areas this year will be focused where weeds grow in navigable parts of the lake and will not include areas around private docks.

 

Homeowner Efforts

Homeowners can take matters into their own hands and try to discourage weed growth in limited areas around their shoreline such as around boat moorings, and swim areas. Unfortunately, physical or mechanical control methods are ineffective for eradicating Elodea as this plant reproduces readily from small fragments. Any physical disturbance of the plant easily breaks the stems into pieces that are capable of reproducing in new locations. Any attempt at mechanical harvesting of Elodea should include a method of capturing the debris, such as nets, or floating vegetation control booms to prevent any fragments from escaping the work area. One simple approach is to attempt harvesting only when prevailing winds will carry clippings to your direct shoreline.  All clippings should be removed from the lake and left on shore for a period of time to de-water.  Only after the weeds have substantially dried, should the NLSS yard debris bin be used to dispose of the unwanted material.

Despite its limitations, mechanical harvesting, cutting and dredging have become widespread techniques to control outbreaks of Elodea. The most widely used instruments for mechanical aquatic weed management are weed-cutting boats, weed rakes usable from shore, or bucket-like shallow dredges. There are many aquatic rakes that might work for your situation such as the OWS Lake Rake, Jenlis Razer Rake and the Muck Razer Roller.

Unfortunately, Elodea appears to be quite resistant to cutting and plant survival is usually not impaired in the long term. On the contrary, cutting produces and spreads plant fragments with a high potential for regeneration and the residual plant tends to form more lateral branches in response to cutting. Furthermore, light availability increases in cut regions, which promotes faster re-growth. Biomass production can, however, be significantly reduced when harvests are performed at the time of the beginning of regeneration of Elodea plants after winter and can be further reduced to almost zero by a second harvest before the beginning of the fragmentation of Elodea plants in spring. Alternatively, the use of biodegradable jute matting or benthic barriers for covering Elodea has been investigated, but up to now only with effects on growth for one vegetation period; after this, the mattings are often damaged and ineffective.

Read more

District Funds New Vegetation Management Plan

The Devils Lake Water Improvement District (DLWID) recently was informed that they are to receive $310,000 from the State of Oregon. The Oregon State Legislature recently approved this new funding.


These new funds will be used to help fund the DLWID second year of active vegetation management as well as ongoing algae monitoring services. Tina French, DLWID board president, recently commented to the News Guard that .“Lake vegetation management is our number one priority, especially considering our recent reduction in algae from the new aeration system. This new funding will help us accomplish our vegetation management plan. On behalf of the Board, thank you Representative David Gomberg for making this happen.”


This funding will support the District’s vegetation management plan for the 2022 recreational season. The plan will expand on the efforts made during the 2021 season which focused mainly on shoreline invasive species such as parrot feather. This year the District will initiate new lake protocols designed to better manage plant growth in the open water column. This effort will include extensive monitoring of vegetation by District staff via boat and by use of a professionally piloted drone allowing for detailed mapping of vegetation.


The primary focus of this effort will be in areas of high plant growth beyond the reach of most private docks. The complexities surrounding private docks limit the District’s ability to control surrounding vegetation. At this time, the homeowner may attempt some control methods directly off shore from their property. We will be publishing an article on those methods which could be used and those which should be avoided, in an upcoming issue.


Boat Parade Scheduled

Everything is set for another great holiday weekend.  We will complete the holiday weekend with our eighth annual boat parade.  Safety is the name of the game so please take a look at our boat parade safety plan and our fireworks safety plan to ensure your day is as safe as it is fun.  Here's the details.

Boat Parade
Date: Monday July 4th
Time: 4:00 PM


Fireworks Display on July 3 2022

The Devils Lake Neighborhood Association board has decided to once again proceed with our annual fireworks display on Devils Lake.  The location of the display will be similar to the last two years as it maximized the viewing available from shore.  Please note that the display will not be visible from Regatta Park, but Brown Bear State Park and Sandpoint Park should prove to be good locations to enjoy the show.  

This is the time of year we ask for donations to fund our show.  This year we need to raise $16,000, follow this donation link or the button in the sidebar to contribute. It's never too early to help us meet our goal.

If you're thinking about spending money on a personal fireworks display consider donating to our professionally produced display instead. During the Lincoln City City Council’s regular meeting April 11, the council voted 5-2 to draft an ordinance that will temporarily ban the sale and use of personal fireworks this year and place an item on the November ballot to allow residents to vote on whether to make the ban permanent.  With this in mind you may find the safe and sane way to enjoy the Independence Day holiday is to enjoy the best fireworks show in town on Devils Lake.  

Mark your calendar.

Fireworks Display
Date: Sunday July 3rd
Time: 9:30 PM (or Dusk)

 



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