Benefit–Cost Analyses Guidebook for Airport Stormwater (2019) / Chapter Skim
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Pages 23-36
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23 Identifying benefits and measuring their value are potentially the most difficult parts of a BCA using the TBL. The process of identifying social and environmental benefits may be relatively new to many airports.
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24 Benefit–Cost Analyses Guidebook for Airport Stormwater during expansion projects, for example, can necessitate storm water infrastructure work for drainage and to remain in compliance with regulatory requirements.
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Benefits 25 • Evaluation of wastewater management strategies; • Water reuse; • Stormwater runoff management; • Replacement of stormwater pipes and installation of drainage swales to sequester tire rubber and heavy metals to prevent them from entering adjacent waterways; and • Biodiversity protection for indigenous plants (including mosses) and wildlife.
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26 Benefit–Cost Analyses Guidebook for Airport Stormwater Climate Change Considerations: Example 2 Minneapolis–St. Paul International Airport indicated that climate change considerations are included when it designs stormwater management infrastructure.
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Benefits 27 4.2.2 Design Variations to Increase Environmental Benefits Many BMPs have considerable flexibility in design and are also the subjects of ongoing research and improvements. Airports can work with design engineers, researchers, state and local engineers, and permitting agencies to adapt or modify BMP designs to improve their environmental or social benefits in addition to meeting FAA regulations and airport stormwater management needs.
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28 Benefit–Cost Analyses Guidebook for Airport Stormwater 4.3 Resources for Information on Benefits 4.3.1 Permitting Information The airport's and other organizations' permits are a source of information about the potential benefits of projects. Federal, state, and local regulatory offices may provide information about the potential cost of failure to comply with stormwater rules.
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Benefits 29 Organization Resource Description U.S. EPA https://www.epa.gov Green Infrastructure Cost–Benefit Resources https://www.epa.gov/greeninfrastructure/green-infrastructurecost-benefit-resources Links to examples of cost–benefit analyses and tools.
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30 Benefit–Cost Analyses Guidebook for Airport Stormwater 4.4 Financial, Environmental, and Social Benefits and Approaches to Assigning Value To the extent possible, an airport should assign values to anticipated benefits so that they can be incorporated into the BCA. Airports may identify benefits based on their own experience, research, or resources such as those identified in this guidance (see the References and Additional Resources section)
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Benefits 31 (continued on next page) Table 8.
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32 Benefit–Cost Analyses Guidebook for Airport Stormwater 4.5 Bayside Airport's Benefits BAY's team researched each benefit to assign monetary values to as many as possible. The team began by analyzing data that were readily available to the airport, such as capital and O&M costs associated with past projects, historic meteorological data, permit noncompliance fines, and historic use of potable water at the airport.
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Benefits 33 Category Element Example Approaches to Assigning Value Safety Reduction of wildlife hazard risks Suggested values: "yes" or "no" to vegetation that reduces wildlife risks. Jobs Regional materials vendors Suggested values: number and percent of project dollars spent on local and regional materials vendors.
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34 Benefit–Cost Analyses Guidebook for Airport Stormwater The team also contacted a local university, which had an environmental department with experience in monetizing benefits of regional environmental resources. The university directed the team to recent research on recreational benefits of coastal areas and helped it interpret the research in the context of the BAY's analysis.
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Benefits 35 Table 11. (Continued)
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36 Benefit–Cost Analyses Guidebook for Airport Stormwater Table 11. (Continued)
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