Illinois Lakes Management Association - Muck … Munching...Muck Munching: a two-year feasibility study for in-lake organic sediment management Upper Fish Lake, LaPorte County, Indiana

MuckMunching:atwo-yearfeasibilitystudyforin-lakeorganicsediment

management

UpperFishLake,LaPorteCounty,Indiana

Fish Lake Conservancy District

SolarBee™MechanicalAerator(SB10000)

0

2

4

6

8

10

12

14

16

May

Jun Jul

Aug

Sep

Oct

DissolvedOxygen(m

g/L)

DissolvedOxygenConcentraHonsat1.5KWaterDepth,UpperFishLake,2015

0

2

4

6

8

10

12

14

16

Mar

Apr

May

Jun Jul

Aug

Sep

DissolvedOxygen(m

g/L)

DissolvedOxygenConcentraHonsat1.5KWaterDepth,UpperFishLake,2016

BiologicalTreatmentOnlyArea AeratedArea

0% 1%8% 12%

27%

0% 0% 0%8%

67%

28%

84%

15%

0%

14%

25%35% 36%

11%

0% 0%

16%

34%

48%

73%

8%

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%Ap

r,2015

Jun,2015

Jul,2015

Aug,2015

Sep,2015

Oct,201

5

Apr,2016

May,201

6

Jun,2016

Jul,2016

Aug,2016

Sep,2016

Oct,201

6

Percen

tofH

mebe

low4m

g/L

PercentofMonthlyPeriodBelow4mg/L,UpperFishLake,2015-2016

WithSolarBeeAerator

WithoutSolarBeeAerator

0

2

4

6

8

10

12

April May June July Aug Sept Oct

Depth(K)

SecchiDepth,CenterofUpperFishLake,2016

2.50

3.00

3.50

4.00

4.50

BiologicalTreatmentOnly AeraGonOnly BiologicalandAeraGon

DepthofW

ater(K

)

VariaHoninDepthtoTopofSediment(10in2disk),UpperFishLake

24-Jun-15

24-Oct-15

17-Jun-16

7-Oct-16

NoNetChange ~5"Increase

Strategy(peracre,UFL)

CapitalInvestment

AnnualMaterials

CostAnnualLabor

AnnualPowerand

MaintenanceCost

TotalAnnualCost1

AnnualBenefit2

AnnualBenefit

(sediment,yd3)

AnnualCost-Benefit

AnnualCost-BenefitifallFLCD'free'

labor

SolarbeeTM $15,000 $400 $1,000 $2,178 109 $1,178 $1,578

SolarbeeTMwithBiological

AugmentaHon$15,000 $900 $2,800 $4,300 $2,904 145 -$1,396 $1,404

DiffuserAeraHon $2,623 $50 $356 $464 $974 $2,178 109 $1,204 $1,559

DiffuserwithBiological

AugmentaHon$2,623 $950 $2,756 $464 $4,274 $2,904 145 -$1,370 $1,385

1Includescapitalinvestmentconsideringa25-yearequipmentlifespan,materials,labor,maintenanceandpowercosts2BasedoncurrentesHmateof$20percubicyardofdredgedsediment