Map of Fish Structures 7/15/21
GREENWOOD MARTIN MARIETTA MATERIALS (MMM) QUARRY EXPANSION
In March of this year, after members of the Lakes & Dam Committee participated in a conference call with the Missouri Department of Natural Resources (MDNR), MMM, and a group of citizens opposed to the quarry expansion, and then the subsequent approval by the MDNR Land Reclamation Division to approve the quarry expansion from a land reclamation perspective, the HOA Board approved the hiring of Intertek/PSI to study the possible impacts of the expanded quarry operations on the new dam and spillway. Intertek/PSI is the firm that designed the new dam and spillway, and they are the engineer of record for the dam. The Intertek/PSI report, dated June 8, 2021, is posted on the HOA web page. The final paragraph of the report reads as follows.
“Based on the USBM RI 8507 Safe Blasting levels at a frequency of 20 to 30 Hertz (a common natural frequency of mass soils), this represents a safe blast level and around an order of magnitude below recorded reading supplied by Martin Marietta’s monitoring company, Vibra-Tech. Therefore, we believe the currently proposed quarry limits will not result in damaging blast vibrations at the concrete spillway for the Winnebago Dam so long as the load per delay is in the range defined above.”
A full explanation of Intertek/PSI’s review, terms, calculations, and assumptions is included in the report.
Bathymetric Maps of Lake Winnebago 2020
From the Lakes and Dam Committee:
BLUE GREEN ALGAE
On December 3 a green colored surface scum in the small cove between 210 South Shore (Fletcher) and 220 South Shore (Darling) was reported. See the picture. We have confirmed that it is Blue Green algae by taking a sample and working with Blue Valley Labs.
We do not plan any specific actions at this time due to the reduced lake activities, but you should stay clear of this cove area and do not allow pets to drink from the waters edge in this area. We will monitor the location thru the winter and into the spring.
The following is some general info on Blue Green algae.
Blue Green algae is most often blue-green in color, but can also be blue, green, reddish-purple, or brown. Blue Green generally grows in lakes, ponds and slow moving streams when the water is warm and enriched with nutrients. When environmental conditions are just right, it can grow very quickly. Most species are buoyant and will float to the surface, where they form scum layers or floating mats.
Blue Green algae can make you sick. Blue Green algae are capable of producing several different toxins. People may be exposed to these toxins through contact with the skin (swimming), through inhalation (motor boating or water skiing), or by swallowing contaminated water. These toxins affect the skin and mucous membranes and can cause allergy-type reactions, asthma as well as headaches, fever and gastroenteritis.
Blue Green algae can make pets sick.
Measures to take to protect yourself. Do not swim in water that looks like "pea soup", green or blue paint or that has a scum layer or puffy blobs floating on the surface. Do not boat, water ski, etc. over such water. Do not let children play with scum layers, even from shore. Do not let pets or livestock swim in or drink the water.
We have not had, or confirmed, Blue Green algae on the lake for years (to my knowledge). It would be more expected in hot weather, but it can occur in cold conditions.
Zebra Mussel Information:
Area bodies of water that are known to have zebra mussels:
(per the Missouri Department of Conservation)
Bull Shoals Lake
Lake of the Ozarks
Prairie Lee Lake
Blue Springs Lake
Little Platte River
Cedar Bluff Reservoir
Chase State Fishing Lake
Council Grow Reservoir
Council Grove City Lake
El Dorado Reservoir
Glen Elder Reservoir-Waconda Lake
Jeffrey Energy Make-Up and Auxiliary Lakes
John Redmond Reservoir
Osage State Fishing Lake
Paola City Lake (Lake Miola)
Wellington City Lake
Winfield City Lake
Wyandotte County Lake
Smokey Hill River
10 Tips to Prevent the Spread of Zebra Mussels throughout Missouri
Zebra mussels, one of the most notorious unwanted hitchhikers, have already made their way into the Missouri, Mississippi and Meramec Rivers. It is up to every Missouri resident and tourist to keep from spreading these harmful mussels throughout the rest of the state.
Why are zebra mussels on the unwanted list?
- The fast multiplying zebra mussels attach and colonize on hard surfaces. Unprotected docks, break walls, boat bottoms, engine outdrives and native freshwater mussels are targets of zebra mussels.
- Zebra mussels consume considerable amounts of beneficial microscopic organisms and this creates less food for larval and juvenile fishes that support native fisheries and native freshwater mussels.
- Beaches are also affected by zebra mussels. The sharp-edged shells along swimming beaches can be a hazard to unprotected feet.
- The potential for zebra mussels to spread is very high. These hitchhikers can spread to other inland waters either in their immature form known as veligers transported in water or as adults attached to boat hulls, engines, aquatic weeds or other surfaces. Veligers are small, about the size of the period at the end of this sentence, and may be able to survive in any residual water source. Adults are very hardy and can survive out of water for extended periods depending upon temperatures, humidity, wind and sunlight. Maximum out-of-water survival time in ideal conditions is about 10 days for adults and 3 days for newly-settled juveniles.
- Female zebra mussels can produce as many as one million eggs per year.
- The negative economic impacts of zebra mussels in North America during the next decade are expected to be in the billions of dollars.
What can YOU do to stop this aquatic hitchhiker?
- Inspect. Thoroughly inspect your boat's hill, drive unit, trim plates, trolling plates, prop guards, transducers, anchor, anchor rope and your trailer's centerboards, axles, and rollers.
- Remove. Remove any visible zebra mussels, however small. If zebra mussels are found, scrape off and trash suspected individuals. Also remove weeds and mud, even the smallest amounts.
- Properly Dispose. Left over bait or any unwanted items removed from the boat should be properly disposed of in the trash and not thrown back into the water.
- Drain. While on land and before leaving any body of water, drain water from all parts of your boat and equipment such as the motor, live well, bilge, transom well and bait buckets.
- Clean. Thoroughly rinse your boat, trailer and equipment. If you were in known zebra mussel infested waters, use 104 degrees F hot water and/or use high pressure hot water from do-it-yourself car washes to "de-zebra" your boat.
- Dry. All parts of the boat should be dry before entering another body of water. If you were in known infested waters, boats, motors and trailers should be allowed to dry thoroughly in the hot sun for at least five days before boating in another body of water.
- Run. If your boat is kept in infested waters, the best way to keep a hull zebra mussel-free is to run the boat frequently. Juvenile zebra mussels are quite soft and are scoured off the hull at high speeds.
- Up/Pump. When in zebra mussel infested waters, leave outboards or outdrives in the up position and pump hot water through your engine's intake on a regular basis to prevent growth inside the engine's cooling system.
- Identify the enemy. Learn what these organisms look like (at least those you can see). If you suspect any new infestations of an exotic plant or animal, report it to the Missouri Department of Conservation.
- Pass the word. If you know people who recreate on Missouri waters (particularly those who boat in out of state waters or in the big rivers of Missouri), talk to them about the importance of following these procedures to protect your waters.
For more information on stopping aquatic hitchhikers, go to www.protectyourwaters.net
or contact the Missouri Department of Conservation.