Kevin Hall
01-01-2008, 08:44 AM
This is information that was previously posted on the "members only" side of the site ....
Posted 10-22-07 by me:
Well, there was a meeting on Friday morning at DeLeon Springs State Park.
There's a lot of technical / site specific stuff that I can get into later ... but the bottom line is that Woodruff/Dexter is going to be treated for hydrilla between the phases fo duck season. The "middle" of the lake will be treated, along with the access areas (boat trails/travel lanes). The littoral zone around the edges will NOT be touched! The littoral zones are mainly native vegetation (Banana lillies & coontail).
I'll go into more detail after work tonight.
Posted 10-23-07 by me:
Let me go over a few of the details of the meeting:
Interested parties in attendance:
Army Corps of Engineers - Lorraine Miller (works under Chance Dubose)
LWNWR - Harold Morrow, Refuge Manager
FL Fish and Wildlife Commission - Jamie Fedderson - Waterfowl Division, and Jay Holder - Fisheries Division
Rick & Ron Rawlins - Highland Park Fish Camp
Captain Bill Flowers - Local Fishing Guide (40+ years)
Conditions
Lake Woodruff:
2200 acres total - 1350 acres covered in hydrilla, 650 acres covered in native plants (littoral zones)
Lake Dexter:
1500 acres (approx.) - 650 acres solid hydrilla, 770 acres in native plants
Problems
Access is being affected by large mats of topped out hydrilla.
Solution
Treat affected areas in a reasonable manner.
About 800-1000 acres of hydrilla will be treated in Lake Woodruff (pending funding, 500 acres minimum). Littoral & native vegetation zones will be left alone!
About 650 acres of hydrilla will be treated in Lake Dexter. Littoral & native vegetation zones will be left alone!
Timing
Affected areas will be treated between 1st and 2nd phase of duck season with Aquathol K. Treatment rate will be at 1ppm for 6 days of contact time. Aquathol K is fairly selective for hydrilla ... some uptake is expected by coontail, but will be minimal.
Basically, DEP is going to treat the "middle" of the lakes for boat access & fishing. The traditional hunting areas will NOT be affected.
On a slightly different note ...
This meeting with Kelli Gladding (DEP) was an EXCELLENT opportunity to show her that UW is quite reasonable. It earned a lot of respect for UW. :D
Posted 12-5-07 by me:
Just a heads up ... Lake Woodruff & Lake Dexter were treated today (12/4) ... and will be finished tomorrow(12/5). I was an "observer" today ... I took lots of pictures ... but, I am beat right now. I'll try to get a summary and a little bit of a narrative up in the next day or two.
Posted 12-6-07 by me:
Ok ... Here's the report.
Here is what was treated ...
Lake Woodruff
surface acre application - 750
ave depth - 7'
acre/feet - 5250
Gal required for 2 ppm - 6750
totes (250 gal) - 27
achieved treatment - 1,000 acres
Lake Dexter
surface acre application - 518.5
ave depth - 7'
acre/feet - 3629.5
Gal required for 3 ppm - 7000
totes (250 gal) - 28
achieved treatment - 650 acres
Lake Dexter was treated at a higher rate (3ppm) because of the increased flow of the SJR across the western end of the lake ... it will dissapate the chemical much easier ... therefore, the higher treatment rate to achieve the same level of hydrilla reduction.
Aquathol K (dipotassium salt of Endothall) was the preferred chemical to use for this application. Aquathol K is fairly selective for hydrilla ... although, Coontail will uptake some of the chemical. Cooler water temperatures will send the coontail into a dormant state, therefore reducing the effects of Aquathol K. That was the main reason to hold off on the treatment of the lakes until now ... lower water temperatures, resulting in the coontail being mostly dormant, and a lower chemical treatment rate (due to cooler water).
Application of Aquathol K was by helicopters ... yes, two of them. Helicopter Applicators, Mike Page - owner, actually did the spraying. I'll tell you what ... these guys are GOOD! Dexter/Mary Farms WMA was used as a "base" for operations.
Posted 10-22-07 by me:
Well, there was a meeting on Friday morning at DeLeon Springs State Park.
There's a lot of technical / site specific stuff that I can get into later ... but the bottom line is that Woodruff/Dexter is going to be treated for hydrilla between the phases fo duck season. The "middle" of the lake will be treated, along with the access areas (boat trails/travel lanes). The littoral zone around the edges will NOT be touched! The littoral zones are mainly native vegetation (Banana lillies & coontail).
I'll go into more detail after work tonight.
Posted 10-23-07 by me:
Let me go over a few of the details of the meeting:
Interested parties in attendance:
Army Corps of Engineers - Lorraine Miller (works under Chance Dubose)
LWNWR - Harold Morrow, Refuge Manager
FL Fish and Wildlife Commission - Jamie Fedderson - Waterfowl Division, and Jay Holder - Fisheries Division
Rick & Ron Rawlins - Highland Park Fish Camp
Captain Bill Flowers - Local Fishing Guide (40+ years)
Conditions
Lake Woodruff:
2200 acres total - 1350 acres covered in hydrilla, 650 acres covered in native plants (littoral zones)
Lake Dexter:
1500 acres (approx.) - 650 acres solid hydrilla, 770 acres in native plants
Problems
Access is being affected by large mats of topped out hydrilla.
Solution
Treat affected areas in a reasonable manner.
About 800-1000 acres of hydrilla will be treated in Lake Woodruff (pending funding, 500 acres minimum). Littoral & native vegetation zones will be left alone!
About 650 acres of hydrilla will be treated in Lake Dexter. Littoral & native vegetation zones will be left alone!
Timing
Affected areas will be treated between 1st and 2nd phase of duck season with Aquathol K. Treatment rate will be at 1ppm for 6 days of contact time. Aquathol K is fairly selective for hydrilla ... some uptake is expected by coontail, but will be minimal.
Basically, DEP is going to treat the "middle" of the lakes for boat access & fishing. The traditional hunting areas will NOT be affected.
On a slightly different note ...
This meeting with Kelli Gladding (DEP) was an EXCELLENT opportunity to show her that UW is quite reasonable. It earned a lot of respect for UW. :D
Posted 12-5-07 by me:
Just a heads up ... Lake Woodruff & Lake Dexter were treated today (12/4) ... and will be finished tomorrow(12/5). I was an "observer" today ... I took lots of pictures ... but, I am beat right now. I'll try to get a summary and a little bit of a narrative up in the next day or two.
Posted 12-6-07 by me:
Ok ... Here's the report.
Here is what was treated ...
Lake Woodruff
surface acre application - 750
ave depth - 7'
acre/feet - 5250
Gal required for 2 ppm - 6750
totes (250 gal) - 27
achieved treatment - 1,000 acres
Lake Dexter
surface acre application - 518.5
ave depth - 7'
acre/feet - 3629.5
Gal required for 3 ppm - 7000
totes (250 gal) - 28
achieved treatment - 650 acres
Lake Dexter was treated at a higher rate (3ppm) because of the increased flow of the SJR across the western end of the lake ... it will dissapate the chemical much easier ... therefore, the higher treatment rate to achieve the same level of hydrilla reduction.
Aquathol K (dipotassium salt of Endothall) was the preferred chemical to use for this application. Aquathol K is fairly selective for hydrilla ... although, Coontail will uptake some of the chemical. Cooler water temperatures will send the coontail into a dormant state, therefore reducing the effects of Aquathol K. That was the main reason to hold off on the treatment of the lakes until now ... lower water temperatures, resulting in the coontail being mostly dormant, and a lower chemical treatment rate (due to cooler water).
Application of Aquathol K was by helicopters ... yes, two of them. Helicopter Applicators, Mike Page - owner, actually did the spraying. I'll tell you what ... these guys are GOOD! Dexter/Mary Farms WMA was used as a "base" for operations.