Based on the latest available information, the 30th Street Southeast boat ramp in Stutsman County, North Dakota is a concrete boat ramp. It is approximately 20 feet wide and is situated on the eastern shore of Jamestown Reservoir, a popular recreational lake in the area.

The boat ramp is designed to accommodate a variety of watercraft, including motorized boats, kayaks, canoes, and other non-motorized vessels. However, it is important to note that the specific restrictions and regulations for watercraft on Jamestown Reservoir may vary depending on the time of year and other factors. Therefore, it is recommended that visitors consult local authorities or signage for the most up-to-date information before launching any watercraft at this ramp.

Overall, the 30th Street Southeast boat ramp appears to be a well-maintained and accessible entry point for visitors to enjoy the scenic beauty and recreational opportunities of Jamestown Reservoir.