In re Costco Stormwater Dishcharge Permit, Costco Final Plat & Site Plan, Costco Act 250 Land Use Permit, Wetlands, Reclassification (R.L. Vallee, Inc. and Timberlake Associates LLP, Appellants)

¶ 1. This appeal is from a decision of the Environmental Division of the superior court affirming several permits issued to appellee Costco Wholesale Corporation for the expansion of its existing retail store and the addition of an adjacent six-pump gasoline station in the Town of Colchester. Appellants R.L. Vallee, Inc. and Timberlake Associates LLP own retail gasoline-service facilities located near the planned development. Appellant Vallee contends the trial court erroneously: (1) determined that Costco’s proposed traffic-mitigation measures were sufficient for issuance of an Act 250…