This brief update summarizes the LCA’s efforts and findings in reviewing Texas Parks & Wildlife’s (TPWD) May, 2007 Hydrilla survey.
Since TPWD released its survey information on June 14, 2007 which estimated a total of 1,380 infested Hydrilla acres, the LCA has endeavored to better understand the survey results. LCA Board Member Ben Richardson and his Dad, Dana, toured Little Lake Creek (primarily covering the infestations of Bentwater, Laketree and Grand Harbor) in their personal boat on June 15. Ben and I, along with the SJRA, toured Caney Creek via SJRA airboat on June 22. On that same day, SJRA and I toured Little Lake Creek for a further view of this highly infested area. On June 23, I toured Lewis Creek (to the best of my ability without getting stuck) in my personal boat. A helicopter flyover of the Lake was delayed last week due to lightning and storm concerns over most available days, and this flyover is trying to be rescheduled for next week. Local residents have also provided numerous reports on what they observed this week from their watercraft and lakefront property.
TPWD provided detailed maps of the heavily infested acreage and the estimated number of infested acres for each location. We checked their math, and understand where they arrived at their total of 1,380 infested acres.
With all of the above being said, there is no way for the LCA to concur with or refute TPWD’s estimate of 1,380 acres. Once on the Lake, the ability to discern a 10 acre infestation from a 20 acre infestation by sight is virtually impossible. Obviously, the same difficulty applies to 100 acre infestations. TPWD makes its assessments utilizing GPS (Global Positioning System) and measures the area by establishing the four corners (or even more coordinates where appropriate) of the infestation. We did not have a GPS system with us in any of the LCA trips on the Lake this week.
So, what can the LCA say? We definitively observed Hydrilla infested acreage that has been reduced by White Amur (and where no herbicides have been applied in 2007). Most of this activity was observed at the deeper edges of the infestation and not in the shallow waters near shores or boat docks. We further observed significant Hydrilla reduction in certain deeper areas where a combination of White Amur and herbicides appear to be making a difference. And, where SJRA has performed Hydrilla herbicide applications in the past ten (10) days, we certainly saw signs of Hydrilla reduction (as would be expected for the monies being spent on herbicides). SJRA and TPWD will be continuing their herbicide applications to shallower waters this coming week.
There is not much more to say at this time. Trying to utilize GPS in the coming week would not prove too valuable because the measurable benefits of White Amur versus herbicides would be difficult, at best, to verify with accuracy (remember, the May, 2007 survey was done PRIOR TO Hydrilla herbicide applications). TPWD will be performing its next survey in July, 2007, and the LCA will have representatives on the boat to ask questions about each infestation. Since this survey commences in 2 – 3 weeks, we feel this is the best method to review the infestation going forward.
I’m pleased to see progress by the White Amur, and believe that the White Amur will be the solution to our problem for 2008. For our beautiful Summer months of 2007, I can also see that herbicide applications are a MUST if we are to enjoy the use of our Lake. As always, we are open to your feedback on the weed infestations of Lake Conroe; and we are greatly appreciative of your donations to the 2007 LCA Fund Raising Campaign which have totaled approximately $100,000 during the past six (6) weeks. Thank you for your time in reviewing this Update. Enjoy your week.
President, Lake Conroe Association