Air Traffic Control Developmental
Other / Unknown
ATC Issue All Types; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Issued New Clearance
Procedure
A C182 departed Boise Airport; Runway 10L; on the 'Boise 2 Departure (BOI2).' Approximately 5 miles off departure end; it appeared that the aircraft was straying north of the BOI2 SID track. I asked the pilot to verity she was established on the BOI2 departure. The pilot responded that she was; but she was having difficulty meeting the required climb gradient. I responded with 'roger.' She then told me she wasn't going to make it over the hill in front of her. I immediately vectored the aircraft 20 degrees right to avoid terrain (while below the MVA); and asked her to 'do her best through 067;' which is the published MVA. She was able to climb to her filed altitude and had no problems. Boise ATCT had; until approximately 1 month ago; a Diverse Vector Area (DVA) that allowed us to vector aircraft south of the airport below the MVA. The DVA was especially useful for smaller/slower IFR aircraft. We could vector the slow aircraft south for faster; succeeding; departures.  Further; aircraft were not required to meet an ATC climb rate of 420 FT/NM when being vectored below the MVA (while in the DVA). I believe it is necessary to expedite the implementation of a new DVA for Boise ATCT.
BOI Controller reported vectoring below the MVA because of a slow climbing GA aircraft.  The reporter listed the recent elimination of the DVA as a contributing factor.