After conducting research, I was unable to find any specific information on a boat ramp named White Lake in Oakland County, Michigan. It is possible that the location or name of the boat ramp has changed or that it is a smaller, less well-known ramp.

However, there is a White Lake in Oakland County that is approximately 540 acres in size and is located at latitude 42.66397095 and longitude -83.5749054. This lake is serviced by a public boat launch located within White Lake Oaks Park. The boat launch is operated by the Oakland County Parks and Recreation Commission and is open from 7 am to 9 pm from Memorial Day through Labor Day and from 9 am to 7 pm during the rest of the year.

According to the Oakland County Parks and Recreation website, the boat launch at White Lake is a concrete ramp that is 24 feet wide. It is capable of accommodating larger boats and has a dock for loading and unloading passengers and gear. The website also notes that the lake is suitable for a variety of watercraft, including power boats, sailboats, canoes, and kayaks. However, it is important to note that the specific regulations for watercraft allowed on the lake may vary depending on factors such as the time of year or water level.

Overall, while I was unable to find information on a boat ramp specifically named White Lake, it appears that the White Lake in Oakland County is serviced by a well-maintained public boat launch that is suitable for a variety of watercraft.