BANGOR – The planning board on Tuesday unanimously approved plans to add a carwash to a Stillwater Avenue filling station and minor changes to Husson College’s campus.

Husson’s proposal called for the addition of a new 8-foot-by-12-foot aluminum-framed greenhouse and modifications to the John Winkin Sports Complex.

The proposed greenhouse will be located in Peabody Hall’s interior courtyard to be reached by way of a path. No utility connections will be needed for the greenhouse, which will be used for academic purposes, according to A. Ray Bolduc of WBRC Architects and Engineers.

The other changes are proposed for the Winkin Sports Complex. Husson requested authority to increase the Astroturf area of the playing field by moving the warning track and a chain-link fence 15 feet closer to the property line along left field.

The changes aren’t expected to affect storm water runoff from the field, which is served by an underground drainage system.

Permission to add a drive-through automatic carwash at Leadbetter’s Super Stop East on Stillwater Avenue was requested by Leadbetter Realty Trust.

Because carwashes are a conditional use in the city’s shopping and personal use districts, Leadbetter’s needed to show, among other things, that its plans provided for parking and adequate queuing and space was provided for vehicles waiting to use the carwash to avoid restricting traffic movements to roads and streets. The planning staff determined that those requirements had been met.

Leadbetter’s also needed to demonstrate that it: complied with development standards and conditions for its property’s zoning designation; that the carwash wouldn’t create unreasonable traffic congestion or hazardous conditions on nearby streets; that its property had the necessary infrastructure; and that the proposed use was appropriate for the site and was consistent with other area development. Members of the city’s planning office determined that those requirements also had been met.

Also Tuesday, the board:

. Received a memorandum from Planning Officer Katherine Weber outlining a proposal to hire a facilitator to lead a community discussion on how to approach development near the Penjajawoc Marsh and stream, an area that has been the source of concern from conservationists worried that encroaching development will irreparably harm wildlife habitat.

. Received a document proposing that public comment be required for all types of planning board applications. City councilors are expected to discuss the proposal later this month.

As things stand, public comment is typically allowed, but not required, for minor subdivisions, major and minor site development applications. Public hearings are required for major subdivisions, mobile home parks and conditional uses.