According to the Arizona Game and Fish Department website, the White Bridge Picnic Site and Boat Launch is a concrete boat ramp located on the Verde River. It is open year-round and can accommodate small watercraft, such as canoes, kayaks, and rafts, as well as motorized boats up to 16 feet in length.

The website does not provide information on the width of the boat ramp, but it does note that the site includes picnic tables, grills, and vault toilets for recreational use. Additionally, there are no fees for using the White Bridge Picnic Site and Boat Launch.

Based on this information, it appears that the White Bridge Picnic Site and Boat Launch is a small boat ramp suitable for launching small watercraft on the Verde River in Arizona. It is open year-round and offers amenities for picnicking and other recreational activities.