The Fairfax County Planning Commission next week will hold public hearings and make recommendations on a long list of proposed land-use changes in the Route 1 corridor, Mount Vernon and Springfield areas.

Many of the proposals deal with preserving existing residential neighborhoods, expanding town-house development and possible changes in both residential and commercial uses being pushed by the Southeast Fairfax Development Corp.

Public hearings will be held on 47 items that are part of the county's 1985 annual review of its comprehensive land-use plan. Hearings are scheduled at the Massey Building in Fairfax City on April 17 and 18. Dates and times of specific hearings can be obtained by calling the office of comprehensive planning. April 27 has been set aside in case hearings run overtime and additional time is needed.

Residents of affected areas are expected to testify both for and against some items. Members of the planning commission will vote on each application based on planning staff reports issued in the last several days and presentations made by property owners and those living near the land involved.

If a proposal is denied by the commission, the land involved cannot be brought up for a land plan change for two years, according to planning commission Chairman George Lilly. Those proposals getting "yes" votes will go before the board of supervisors in early summer.

The planning staff has recommended that the commission veto a proposal by H. B. Cole and Fred Keller that would change the plan for 220 acres south of Pohick Creek, east of Route 1 and north of Gunston Cove Road, to allow for high-density town-house construction. The site involves several parcels, some of which are planned for offices, parks, low-density town houses and low-density detached homes.

If the application were to be approved, the staff said "a loop collector road, with access at two locations on Route 1" would be needed to handle traffic.

The staff is supporting some changes proposed by the Federation of Lorton Communities and says the county land plan for the Lorton area between Route 1 and Mason Neck should be strengthened to "protect the rural character of the area." In addition, the staff said efforts should be made to guide commercial development in the Lorton area toward existing major intersections.

Here is a sampling of other proposals to be aired.

* A proposal by Martin Turk to develop a mixed-use planned community on the 3,000 acres occupied by the District's Lorton prison facility.

"County policy calls for the Lorton prison to be relocated outside of Fairfax County," according to the staff. However, there is no move on the part of the District to move the facility. If that should happen, the land would become a regional park.

* Three separate applications by Louie Terango, Bernard M. Fagelson and Martin Walsh seeking high-density residential use of 37 acres in the Old Keene Mill Road area east of Accotink Creek.

* The staff is recommending approval with a long list of conditions. The staff is recommending denial of an application for town-house designation for a 33-acre residential tract north of Franconia Road and east of Kitson Lane.

The following requests were among those by the Southeast Fairfax Development Corp. The staff is recommending that the county support the corporation's proposal to reinforce support for the coming expansion of the 40-acre Woodley-Nightingale Mobile Home Park on Route 1. The staff is recommending denial of a proposal to rezone 20 acres west of Fordson Road and east of Route 1 for high-density residential development in order to support the Gum Springs Neighborhood Improvement Program and Conservation Plan.

The staff is recommending approval of a modification of a proposed residential development on 64 acres east of Route 1 on both sides of Central Avenue.

The staff is recommending deferral of a decision on the future of the former Walt Whitman Intermediate School on Route 1 south of Gregory Drive until the County Board of Education decides whether the property is surplus. If that should happen, the development corporation said it would like to see the school turned into a community center.