This year there was all this green stuff floating on the water over the past few weeks, what is that and will it go away next year?

This is likely a filamentous alga called Spirogyra or a similar species. Spirogyra is a native green alga that grows on the lake bottom in early summer. Air bubbles get caught in the algae and it eventually floats to the water surface and decomposes. Aquatic plants cause some shading of the lake bottom and prevent the growth of this type of algae to some degree. Excessive removal of aquatic plants means that there will likely be more Spirogyra. The amount of aquatic plants that return following the drawdown will likely dictate the amount of filamentous algae that is floating in the lake.

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1. What is a lake drawdown?
2. Why would the City of Whitewater do a lake drawdown?
3. When will the drawdown begin and how fast will it go down?
4. Is there concern about how long it will take to fill back up?
5. What will happen to the fish and other wildlife in the lake?
6. What are our personal dredging options during the drawdown? Are there any exemptions? Can I remove any material without a permit?
7. Is there a list of contractors providing shoreline work?
8. Can we remove trash from the exposed bed? Can we remove material such as broken glass?
9. Can we use this opportunity to add pea gravel?
10. Can we remove large boulders/rocks?
11. Can I replace or repair my rip rap?
12. Can I put in new rip rap? If not, what are other options other than rip rap for shore stabilization? What if I need rip rap to protect from man-made waves (boat traffic)?
13. Will the starry stonewort be sent downstream during the drawdown?
14. Will I be able to walk on the lake bottom?
15. Will the boat launches be open this Fall, Winter, Spring?
16. Can I remove the plants from the bottom of the lake in front of my house?
17. What plants or algae will die during the freeze and which will come back next spring/summer?
18. This year there was all this green stuff floating on the water over the past few weeks, what is that and will it go away next year?
19. I’m losing 2 seasons of my lake use; will this really work?