approach, or that specifically requires a component-by-component least-cost analysis of an integrated system-wide transmission upgrade. New Haven cites to a provision of the statute defining a natural gas facility as including “any natural gas transmission line,” 30 V.S.A. § 248(a)(3)(A), but this section does not signal a clear legislative intent to subject virtually every proposed gas or electric transmission line or other project component to a separate least-cost analysis when it is part of an otherwise integrated project. As the Board’s approach under § 248 was neither unreasonable nor contrary to the plain terms of the statute, and was well within the scope of its expertise, it must be upheld. See In re Verizon New Eng. Inc., 173 Vt. 327, 334-35, 795 A.2d 1196, 1202 (2002) (<HOLDING>); In re Twenty-Four Vt. Utils., 159 Vt. at 359,
holding that in reviewing a claim construction decided under the broadest reasonable interpretation standard we determine whether the interpretation is within the range of reasonableness holding that we review a district courts interpretation of a statute de novo recognizing that absent compelling indication of error we will not disturb boards interpretation of statutes within its particular area of expertise holding that our standard of review for decisions of the health care authority board  predecessor to the division  is very narrow and that we will not disturb the boards statutory interpretations absent a compelling indication of error internal quotation marks and citations omitted holding that we show  deference to an agencys conclusions in the area of its expertise