LAKE SANTA FE LAKE SANTA FE TIME FOR RENEWALTIME FOR RENEWAL

EUTROPHIC LAKEEUTROPHIC LAKE

““Lake with high primary Lake with high primary productivity resulting from high productivity resulting from high

nutrient content”nutrient content”

HISTORYHISTORY

• Original construction around 1972Original construction around 1972

• Approximately 18 surface acresApproximately 18 surface acres

• Current maximum depth 45’Current maximum depth 45’

• Inlet dredged twiceInlet dredged twice

• Cofferdam (at inlet side) is due for Cofferdam (at inlet side) is due for dredgingdredging

THE PROBLEMTHE PROBLEM

• Filamentitious Algae (the floating Filamentitious Algae (the floating smelly weed mat that you see)smelly weed mat that you see)

• Naiads (the fern like weeds that Naiads (the fern like weeds that emerge to the surface in mid to late emerge to the surface in mid to late summer)summer)

• ““Muck” bottom built up over years of Muck” bottom built up over years of decompositiondecomposition

THE NUTRIENT SOURCE(S)THE NUTRIENT SOURCE(S)

• Natural aging of the lakeNatural aging of the lake• Nutrient flow from the inlet watershedNutrient flow from the inlet watershed• Decaying organic materials (leaves, algae, Decaying organic materials (leaves, algae,

weeds, fish, birds/animals and the effluent weeds, fish, birds/animals and the effluent from old grass carp)from old grass carp)

• Phosphorous and nitrogen based fertilizersPhosphorous and nitrogen based fertilizers• Effluent from septic systems. The septic Effluent from septic systems. The septic

effluent makes the LSF situation unique to effluent makes the LSF situation unique to other area lakes (i.e. White Oak Lake) other area lakes (i.e. White Oak Lake) because it is a prime source of nutrients. because it is a prime source of nutrients.

REGARDING DREDGINGREGARDING DREDGING

• The last dredging project took years to get The last dredging project took years to get approved and fundedapproved and funded

• The results have been criticizedThe results have been criticized• IF the dredging hadn’t been done, the inlet IF the dredging hadn’t been done, the inlet

(East) end of the lake would be a swamp (East) end of the lake would be a swamp by nowby now

• The dredging project was compromised by The dredging project was compromised by funding and inability to drain down prior to funding and inability to drain down prior to dredgingdredging

• Our Proposal addresses the entire lakeOur Proposal addresses the entire lake

PROPOSAL FOR HOLISTIC PROPOSAL FOR HOLISTIC APPROACH TO REMEDIATIONAPPROACH TO REMEDIATION

• Combined approach - all elements interact Combined approach - all elements interact to accomplish the following OBJECTIVES:to accomplish the following OBJECTIVES:– Visually pleasing lakeVisually pleasing lake– Minimize chemical treatmentMinimize chemical treatment– Transformation of muck bottomTransformation of muck bottom

• Reduction of built-up nutrientsReduction of built-up nutrients• Tactile improvement for swimmers and wadersTactile improvement for swimmers and waders

– Significant reduction of algae Significant reduction of algae – Reasonable control of Naiads and other weed Reasonable control of Naiads and other weed

growthgrowth– Fisheries ManagementFisheries Management

PROPOSED APPROACHPROPOSED APPROACH

• Aeration (has been proposed to current Aeration (has been proposed to current and previous LSF Boards)and previous LSF Boards)

• Digestion/Enzyme TreatmentDigestion/Enzyme Treatment

• Colorant/DyeColorant/Dye

• Spot Treatment with chemical controlsSpot Treatment with chemical controls

• Annual fish stockingAnnual fish stocking

• Each element will be discussed Each element will be discussed separatelyseparately

BEFORE WE BEGINBEFORE WE BEGIN

• The LSF Conservation Committee has The LSF Conservation Committee has worked very hard to move toward the stated worked very hard to move toward the stated objectives.objectives.

• We have accomplished much in an aging We have accomplished much in an aging eutrophic lake within a limited budget.eutrophic lake within a limited budget.

• We are asking for your financial and We are asking for your financial and personal assistance.personal assistance.

• Our proposal is BUDGETARY but also Our proposal is BUDGETARY but also realistic. Once we have your approval, we realistic. Once we have your approval, we will conduct full research to find the best will conduct full research to find the best and most cost-effective solutions and and most cost-effective solutions and products. We promise.products. We promise.

AerationAeration

• Assists in natural aerobic digestion of Assists in natural aerobic digestion of decayed organic matterdecayed organic matter

• Improved dissolved oxygen in the Improved dissolved oxygen in the water throughout the stratification water throughout the stratification layerslayers

• Improves effectiveness of Improves effectiveness of digestion/enzyme treatmentsdigestion/enzyme treatments

• Improved fishery due to improved Improved fishery due to improved water qualitywater quality

DIGESTION/ENZYME DIGESTION/ENZYME TREATMENTTREATMENT

• Aggressive approach for the most Aggressive approach for the most efficient removal of sediment muck.efficient removal of sediment muck.

• Most effective in conjunction with Most effective in conjunction with aerationaeration

• Bacterial treatment that reduces Bacterial treatment that reduces excessive nutrients, sludge, excessive nutrients, sludge, contamination and odorscontamination and odors

• Recommended rate 50#/acreRecommended rate 50#/acre

COLORANT/DYECOLORANT/DYE

• Non-toxicNon-toxic• Stratifies on the top 3 to 4 feet of the surfaceStratifies on the top 3 to 4 feet of the surface• Blocks sunlight penetration to prevent weed Blocks sunlight penetration to prevent weed

emergence and seed germinationemergence and seed germination• Pleasing to the eye blue colorPleasing to the eye blue color• Spring application intended primarily for pre-Spring application intended primarily for pre-

emergenceemergence• LSF has too much flow to expect to maintain LSF has too much flow to expect to maintain

colorant for duration of summercolorant for duration of summer• Gives the digestion/enzyme treatment a better Gives the digestion/enzyme treatment a better

chance to workchance to work• May be utilized annually depending on resultsMay be utilized annually depending on results

SPOT CHEMICAL SPOT CHEMICAL TREATMENTTREATMENT• Same chemicals available as a commercial applicatorSame chemicals available as a commercial applicator

– LSF personnel will do applicationLSF personnel will do application– Not paying profit margins and mark-up of a for profit Not paying profit margins and mark-up of a for profit

corporationcorporation

• Boat and FOUR CYCLE (clean burning outboard) on Boat and FOUR CYCLE (clean burning outboard) on loan to LSF for weed control (An outside contractor loan to LSF for weed control (An outside contractor will also use a gas powered outboard for treatment)will also use a gas powered outboard for treatment)

• Spot treatment should be minimal if the other controls Spot treatment should be minimal if the other controls are effectiveare effective

• Have the option to leave a natural area (at the dam?) Have the option to leave a natural area (at the dam?) to allow weed growth and encourage fish and to allow weed growth and encourage fish and amphibian reproduction.amphibian reproduction.

FISH STOCKINGFISH STOCKING

• Attempting to maintain balance between Attempting to maintain balance between – Quality of fishQuality of fish– Quantity of fishQuantity of fish– Variety of fishVariety of fish

• Intending to implement catch size and harvest Intending to implement catch size and harvest limitslimits

• Pan fish highly pressured – immediate focus on Pan fish highly pressured – immediate focus on stocking pan fish to assist natural reproduction stocking pan fish to assist natural reproduction rates rates

• LM bass recovered nicely from harvest LM bass recovered nicely from harvest management – quality and quantity is seeking a management – quality and quantity is seeking a good balancegood balance

$$$$$$$$$$$$WE$$$$$$$$$$$$$$$$$$$$$$WE$$$$$$$$$$$$$$NEED$$$$$YOUR$$$$$NEED$$$$$YOUR$$SUPPORT$$$$$$SUPPORT$$$$$• Remember that this is a budgetary Remember that this is a budgetary

proposal. We are also investors and proposal. We are also investors and intend to spend the resources wisely.intend to spend the resources wisely.

AERATION ESTIMATEAERATION ESTIMATE

• We may require assistance from a few homeowners We may require assistance from a few homeowners to avoid running electrical power to the pump to avoid running electrical power to the pump stations.stations.

• Planning a re-imbursement program for electrical Planning a re-imbursement program for electrical usageusage

• The pumps will likely be ¾ hp units with weighted air The pumps will likely be ¾ hp units with weighted air hosehose

• Number and placement of units to be determined Number and placement of units to be determined (two stations with 3 to 5 aerators anticipated)(two stations with 3 to 5 aerators anticipated)

• Equipment cost estimated to be $8,000 to $12,000Equipment cost estimated to be $8,000 to $12,000• Installation by LSF Installation by LSF • 6 month operational cost should not be significant6 month operational cost should not be significant

DIGESTOR/ENZMYE DIGESTOR/ENZMYE TREATMENT ESTIMATETREATMENT ESTIMATE

• RECOMMENDED INITIAL RATE OF RECOMMENDED INITIAL RATE OF APPLICATION IS 50#/ACREAPPLICATION IS 50#/ACRE

• Estimated cost is $3,500Estimated cost is $3,500

COLORANT ESTIMATECOLORANT ESTIMATE

• There is a new product on the market There is a new product on the market that will treat 4 acres with one quart. that will treat 4 acres with one quart. (NT MAX Colorant)(NT MAX Colorant)

• Estimated cost $250.00Estimated cost $250.00

• The product dilution rate will depend The product dilution rate will depend on the flow on the flow

• Harmless to humans pets and fish Harmless to humans pets and fish

CHEMICAL SPOT TREATMENT CHEMICAL SPOT TREATMENT ESTIIMATEESTIIMATE

• Costs for chemicals (Free labor) has Costs for chemicals (Free labor) has averaged approximately $1100 per averaged approximately $1100 per year for the last three years.year for the last three years.

• We anticipate that this cost will be We anticipate that this cost will be reduced by 50%reduced by 50%

FISH STOCKINGFISH STOCKING

• THE LSF Conservation Committee THE LSF Conservation Committee requests an annual budget of $800 requests an annual budget of $800 to maintain the stocking program. to maintain the stocking program.

WHAT ELSE CAN WHAT ELSE CAN YOUYOU DO TO DO TO HELPHELP• Maintain septic system per local codes and LSF Maintain septic system per local codes and LSF

RegulationsRegulations• Replace with evaporative system when Replace with evaporative system when

replacement is necessary (or before)replacement is necessary (or before)• Allow buffer strip at lake edge to absorb nutrients Allow buffer strip at lake edge to absorb nutrients

and minimize erosionand minimize erosion• Use phosphorous free fertilizersUse phosphorous free fertilizers• No fertilizer within 20 feet of shorelineNo fertilizer within 20 feet of shoreline• Mechanical removal of weeds (a weed rake is Mechanical removal of weeds (a weed rake is

available)available)• Individual chemical application by homeowners is Individual chemical application by homeowners is

strictly prohibitedstrictly prohibited

BOTTOM LINE AND BOTTOM LINE AND QUESTIONSQUESTIONS• We will request that the LSF Board assist We will request that the LSF Board assist

homeowners with funding this project. homeowners with funding this project. • If the total budgetary amount of $20,000 is If the total budgetary amount of $20,000 is

necessary, the assessment would be $500.00 per necessary, the assessment would be $500.00 per household.household.

• We will ask the Board to allow homeowners (upon We will ask the Board to allow homeowners (upon special request) to pay the assessment in five special request) to pay the assessment in five payments of $100 over the course of the summer.payments of $100 over the course of the summer.

• Questions?????? And Thank You.Questions?????? And Thank You.• Respectfully Submitted, Respectfully Submitted,

– The Lake Santa Fe Conservation Committee. (ALL are The Lake Santa Fe Conservation Committee. (ALL are welcome to participate)welcome to participate)