Craig Dawson, AIS Program Director DATE: June 12, 2014, Board Workshop SUBJECT: AIS Economic Study
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M E M O R A N D U M TO: MCWD Board of Managers FROM: Craig Dawson, AIS Program Director DATE: June 12, 2014, Board Workshop SUBJECT: AIS Economic Study Background: The Board of Managers authorized the District to engage with the University of Minnesota’s Applied Economics Department to do an economic study “to estimate the economic costs and benefits of management practices designed to limit the spread of aquatic invasive species (AIS).” The purpose of such a study was to provide more informed decision-making on alternative courses of action in preventing or controlling the presence of AIS. The work performed by the University team has two parts. The first is a review of academic literature on the subject, which was presented to the Board at its January 9, 2014, workshop. Based on that review and direction from the workshop discussion, the second part investigates expenditures with associated with preventing and managing AIS. This investigation focuses on Great Lakes states as well as the State of Florida, as the latter has the most experience and expenditures for preventing and controlling AIS. As the University team has found out, in the existing literature and available information it is difficult to find the types of data or experiences to analyze the management questions the District had hoped to more easily guide decision-making. Draft Report for Discussion: A draft of the full report, “Economic Aspects of Aquatic Invasive Species”, is included in the agenda packet. As mentioned above, the Board has already reviewed the first part of the report. The second part of the report, “Expenditures on Treatment and Control”, begins on page 38. Conclusions and final recommendations for the District begin on page 65. In Part 2 of the report, the “analysis of AIS expenditures reflects data from public and private organizations. It does not address the added costs to private individuals nor public infrastructure, such as: increased costs in maintenance and repair for boats, docks, and lift equipment; increased maintenance and replacement costs for pipes to use lakewater (e.g., for watering lawns, etc.); the value of people’s time to perform maintenance, transport equipment for repairs, etc.; and finally, costs for public infrastructure, for example increased need to clean/maintain pipe outlets, increased need to maintain public launches and public beaches (and attendant disposal costs).” That said, the public cost for AIS treatment, not prevention, ranged from $289 to $376 per acre per year, and the cost per boat inspection was $29. Dr. Steve Taff will make a brief presentation on the report and respond to questions from the Board. The draft report included in the agenda packet is still subject to minor revisions based on corrections noted by the University team and from the discussion with the Board at the June 12 workshop. There should be some discussion about undertaking a Phase 2 of this study, based on what further research may be warranted. The 2014 budget and workplan include $50,000 to perform such additional work. Economic Aspects of Aquatic Invasive Species A report to the Minnehaha Creek Watershed District Baishali Bakshi, Frances Homans, Steven J. Taff1 June 3, 2014 1 Graduate Research Assistant, Natural Resources Science and Management Program; Professor, Department of Applied Economics; and Associate Professor, Department of Applied Economics, University of Minnesota, respectively. Contents Overall Introduction ................................................................................................................... 4 Part 1: Literature Review ........................................................................................................... 6 Introduction to Part 1 ............................................................................................................. 6 Study Organization................................................................................................................. 7 Economic Impact of Invasive Carp ...................................................................................... 10 Ecological Characteristics ................................................................................................ 10 Economic Costs ................................................................................................................ 11 Control Strategies ............................................................................................................. 12 Economic Impact of Invasive Crustaceans .......................................................................... 14 Ecological Characteristics ................................................................................................ 15 Economic Costs: .............................................................................................................. 16 Control Strategies ............................................................................................................. 16 Economic Impact of Other Invasive Fish............................................................................. 17 Sea Lamprey: ....................................................................................................................... 18 Ecological Characteristics ................................................................................................ 19 Economic Costs ................................................................................................................ 19 Control Strategies ............................................................................................................. 20 Economic Impact of Invasive Mussels ................................................................................ 20 Ecological characteristics ................................................................................................. 21 Economic Costs ................................................................................................................ 22 Control strategies ............................................................................................................. 23 Economic Impact of Milfoil ................................................................................................. 24 Economic Costs .................................................................................................................... 24 Control Strategies ............................................................................................................. 25 2 Economic Impact of Other Invasive Weeds......................................................................... 25 Ecological characteristics ................................................................................................. 26 Economic costs................................................................................................................. 26 Control Strategies ............................................................................................................. 27 Conclusions .......................................................................................................................... 29 References for Part I............................................................................................................. 31 Part 2: Expenditures on Treatment and Control ....................................................................... 38 Introduction to Part 2 ........................................................................................................... 38 Indiana .................................................................................................................................. 39 Minnesota ............................................................................................................................. 41 New York ............................................................................................................................. 52 Wisconsin ............................................................................................................................. 57 Florida .................................................................................................................................. 60 Comparison of all states ....................................................................................................... 64 Conclusions amd Final Recommendations .......................................................................... 65 Contact Information ............................................................................................................. 68 References for Part 2 ............................................................................................................ 69 3 Overall Introduction This is a collaborative project between the Minnehaha Creek Watershed District (MCWD) and the University of Minnesota to conduct an initial assessment of the economic impact of aquatic invasive species (AIS) and reported AIS control strategies relevant to the Upper Midwest (Great Lakes) region of the United States. This project has two main parts: (1) a literature review of existing research on the economic impact of AIS, focusing on the Great Lakes region (Part 1); and (2) an assessment of the costs of AIS management (control) and intervention (prevention) measures for the Great Lakes states (Part 2). To properly assess the economic costs/values of AIS control, we would ideally like to estimate both the probabilities of success/failure and