Public utility installations and facilities that are needed to serve the Village or the immediate neighboring communities, subject to a determination by the Village Board of Trustees that no other location in a less restricted district can reasonably be used for the purpose contemplated and subject, further, to such conditions as the Planning Commission may deem to be appropriate for the protection of adjoining properties and of the character of the district. The site development plan shall be subject to approval by the Planning Commission, in accordance with the provisions of § 185-50 of this chapter.