Phillip, TEPaul & Tom Doak,
There's another reason why I don't think that # 2 had 290 bunkers.
Aronomink, Oakmont and Pine Valley were all designed to be private courses of "championship" caliber.
Pinehurst was intended to be a public resort, with a hotel clientele, and in those days it was really a distant destination resort, with many arriving by train. It was also a seasonal, not a year round resort.
290 bunkers would hardly seem to present a guest friendly golf course.
Resorts want repeat business, they don't want to beat up their guests, never to have them return again. 290 bunkers would be a daunting if not overwhelming challenge, especially for women.
Hollywood, which was intended to be a "championship" golf course, had about 200 bunkers, and from the looks of the early aerials, it looked almost unplayable for good golfers. Increasing the bunker count by 50 % would seem to make it even more impossible to play, especially for resort types.
Perhaps they had 290 bunkers planned for all of the resort courses.