Taking No Prisoners Beating Back Invasive Species
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1 Taking No Prisoners Beating Back Invasive Species Leonard Willett Hoover Dam - Lower Colorado Region
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4 Environmental Requirements Parameter Adults do not survive long-term Uncertainty of veliger survival Moderate Infestation Level High Infestation Level Calcium (mg/l) <8 to <10 < Alkalinity (mg CaCO3/L) < >90 Total Hardness (mg CaCO3/L) < ph <7.0 or > or or Mean Summer Temperature ( F) < or > or Dissolved Oxygen mg/l (% saturation) <3 (25%) 5-7 (25-50%) 7-8 (50-75%) 8 (>75%) Conductivity (μs/cm) <30 < Salinity (mg/l) (ppt) > (<0.01) 5-10 ( ) <5 (<0.005) Secchi depth (m) <0.1 > or > Chlorophyll a (μ/l) <2.5 or > or Total phosphorous (μg/l) <5 or > or
5 Threshold Values Calcium Concentration ph Level Ca 12 mg/l 12 mg/l < Ca 15 mg/l Ca > 15 mg/l ph 7.3 unable unable unable 7.3 < ph 7.8 unable potentially able potentially able ph > 7.8 unable potentially able able
6 Area of Study Unable to Support Dreissenid Mussels Potentially Able to Support Dreissenid Mussels Able to Support Dreissenid Mussels
7 Forms of Problems Flow restriction Roughening (Friction loss) Blockage Chemical degradation Biological/Environmental Food chain Habitat Water quality Water resource industry Toxic accumulations Byssal threads Quagga mussel, Lake Havasu Jan. 2007
8 Food Web Alteration Time Line Lake Huron Main Basin Source - Michigan DNR, 2007
9 Chinook Weight at Age 3 Lake Huron Source - Michigan DNR, 2007
10 Chemical Degradation - Corrosion Pseudofeces Siphons
11 Hoover Dam Pressure Relief Valve Shaft Corrosion April 2013
12 Parker Dam
13 Sampling Plates at Parker Dam November 11/07 6 Weeks of Settlement
14 Aquatic Weeds Lake Havasu, AZ August 2008
15 Aquatic Weeds Lake Havasu, AZ Evaluate weeds and intake design. Retrofit of trash bar screens with racking systems (Parker Dam) Evaluate impacts of mussels on reservoir water quality and environmental impacts.
16 Davis Dam
17 Davis Dam Fixed Wheel Gate - Oct 07
18 Hoover Dam
19 Intake Towers - April 2009 Fore bay 1094 ft Trash Racks 6/2009 Upper Cylinder Gate 11/2007 Intake ft Intake ft
20 Fire protection and other cooling water systems need protection Transformer cooling water Fire nozzles
21 Historical Observations-Hoover Dam Nov 2007 Penstock Apr 2008 Gen Cooling Water Supply Line Oct 2008 Penstock Oct 2009 Penstock
22 Penstock belly drain Oct 2010
23 Hoover Dam s 10-Year Budget for Mussel Control FY 2014 FY 2015 FY 2016 FY 2017 FY 2018 FY 2019 FY 2020 FY 2021 FY 2022 FY 2023 FY 2023 Contract 450, , , , , , , , , , ,000 Equipment & Materials 310, , , , , , , , , , ,000 Hoover Labor 20,000 20,000 20,000 20,000 20,000 20,000 20,000 20,000 20,000 20,000 20,000 Non-Contract 40,000 40,000 40,000 40,000 40,000 40,000 30,000 40,000 40,000 40,000 40,000 Total 820, , , , ,000 1,020,000 1,020,000 1,020,000 1,020,000 1,020,000 1,020,000
24 Reclamation Lower Colorado Region Monitoring substrate Research Activities Installed bio-boxes Evaluating water jetting system for exterior cleaning Evaluating anti-foul coatings and materials to resist mussels (Dr. Allen Skaja, TSC Denver)
25 Reclamation Lower Colorado Region Research Activities Tested micro-filtration systems (40-80 micron) Evaluating ultra-violet light treatment Evaluation of Zequanox treatment (completed) Turbulence study on cooling water (study underway) Copper Ion Generator (future study) ph down or up evaluation (completed)
26 Installed Bio-Box Sampler for Monitoring Mussels settling on plates Cooling water inlet from reservoir
27 External Structures Options Mechanical Cleaning de-water and use power wash underwater, scrape and vacuum or power wash
28 Durable of foul release coatings still a problems Coatings Study & Locations
29 STEEL International Amercoat Sigmaglide FUJI 3 YEARS Silicone 6 months Silicone 18 mo.
30 Parker Dam Trash Rake Coating Research Summer 2013
31 Cooling Water Filter Options Parker Dam Research Filter $100K 40 & 80 micron filter cartridge inside of all housing Hoover s SCADA Filters $200K Hoover s cooling water $333K 2010 (4 filters purchased for A2, N2, N1, & N8)
32 Hoover Dam Cooling Water Mussel Control UV System (research) Started August lamps Renata Claudi (RNT Consulting) starting 4 lamp evaluation Upgrade to 4 lamps to increase dosage April 2011
33 UV dosage response evaluation for settlement prevention of mussels UV equipment cost $ K 1250 gpm with UVT of 85 dosage of 100 mj/cm2 Power operational cost $2500/yr $0.035/kwh UV equipment cost $ K 4000 gpm with UVT of 85 dosage of 100 mj/cm2 Renata Claudi (RNT Consulting)
34 Marrone Bio Innovations and Bureau of Reclamation work at Davis Dam, AZ
35 Extensive Ecotox Studies Show No Impact to Other Aquatic Species FISH Bluegill sunfish (Lepomis macrochirus) Channel catfish (Ictalurus punctatus) Chinook Salmon (Oncorhynchus tshawytscha) Coaster brook trout (Salvelinus fontinalis) Common Carp (Cyprinus carpio) Fathead Minnow (Pimephales promelas) * Klamath Suckers (Catostomus sucker spp) Lake sturgeon (Acipenser fulvescens) Largemouth bass (Micropterus salmoides) Rainbow Trout (Oncorhynchus mykiss) * Sacramento Splittail (Pogonichthys macrolepidotus) Smallmouth bass (Micropterus dolomieu) Striped Bass (Morone saxatilis) Walleye (Sander vitreus) Yellow perch (Perca flavescens) OTHERS Mallard Duck * Midge (Chironomidae) Mayfly (Baetis) Amphipod (Hyalella azteca) * European Freshwater Crayfish (Austropotatamobius pallipes) Freshwater Crustacean (Asellus aquaticus) Freshwater Water Flea (Daphnia magna) * MOLLUSCS Blue Mussel (Mytilus edulis) * Freshwater Mussel - Duck Mussel (Anadonta) Freshwater Mussel - Black Sandshell (Ligumia recta) Freshwater Mussel - Fatmucket (Lampsilis siliquoidea) Freshwater Mussel - Pink mucket (Lampsilis abrupta) Freshwater Mussel - Hickorynut (Obovaria olivaria) Freshwater Mussel - Higgins Eye (Lampsilis higginsii) Freshwater Mussel - Mucket (Actinonaias ligamentina) Freshwater Mussel - Paper Pond Shell (Utterbackia imbecillis) Freshwater Mussel - Plain Pocketbook (Lampsilis cardium) Freshwater Mussel - Washboard (Megalonaias nervosa) Freshwater Snail (Lymnaea peregra) PLANTS AND ALGAE Algae * Bindweed (Convolvulaceae) Common Water Plantain (Alisma subcordatum) Curly Dock (Rumex crispus) Mallow (Malvaceae) Nightshade (Solanaceae) Smallflower Umbrella Sedge (Cyperus difformis) 35 * EPA required Final report expected by mid Studies conducted by Institute of Technology, Sligo, Ireland; New York State Museum and USGS; U.S. Bureau of Reclamation; Certified Good Laboratory Practices (GLP) Lab; and MBI lab
36 Zequanox Treatment Programs 36 Product applied with standard equipment Treatments can be completed within hours ~2-6 hrs depending on program Mortality occurs over time, reducing damage to equipment from shell debris Safe for employees in the surrounding area Mortality typically monitored via biobox systems Annual Designed for facilities with tolerance for moderate to large shell sizes (larger than 4 mm in size) Treatments occur annually; typically end of season Bi-Weekly Goal is to limit the number of mussels that exceed 4 mm in size (adult sized) Ideal for sensitive systems and equipment Treatments are performed every other week throughout the settlement season
37 Zequanox Regulatory Status US Environmental Protection Agency approved commercial formulation in 2012 Food tolerance exempt (76 FR 52871) Current label covers enclosed systems Open water label in process Canada s Pest Management Regulatory Agency approved commercial formulation in 2012 Current label covers hydropower applications Application for label expansion in process European Union Dossier submitted Dec 2012 for Annex I inclusion 37
38 38 Bi-Weekly Regimen Reduces Settlement by 90%
39 Controlling Mussels at Davis Dam US Bureau of Reclamation, Davis Dam Bullhead City, AZ; Colorado River Five turbine, 240 MW hydropower facility Each subsystem has a separate cooling water system 5000 gpm per cooling water subsystem 39
40 Zequanox Treatment Monthly Material Price for Davis Dam (January 2013) $16,000 $14,000 Normal Flow 3800 GPM $13, Per Month $137,000,000 Per Year One Unit $685,000 Per Year - Five Units $12,000 $10,000 Minimum Flow 1500 GPM $ Per Month $78,000 Per Year One Unit $390,000 Per Year - Five Units $8,000 $6,000 $4,000 $2,000 Costs based on average run time of 10 Months, BI-Weekly Treatments. $ Cooling Water Flow Rate (gpm per unit)
41 Turbulence Study April 2013
42 Proposed Copper Ion Generator Unit Anodes are installed in cells (fresh water units). A side-stream of water is passed thru the unit and a copper-rich concentrate is formed. The treated solution is then distributed to one or more intakes to treat all the users.
43 Special Consideration, cont d Fish Protection Facilities, PNR Instrumentation
44 Conclusions Western watersystems differ from eastern: Long, continuously managed reaches of flowing water Systems designed for water dispersal Structures often lack designs and management plans to contend with quaggas and zebras New problems are apparent requiring new management techniques
45 QUESTIONS Leonard Willett, Quagga Mussel Coordinator (702)
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