Based on the latest information available, the boat ramp named 6th Avenue Southeast Thurston County is located in Washington, with a latitude of 47.05809402 and a longitude of -122.69161224. This boat ramp is a public facility maintained by Thurston County Parks and Recreation.

The boat ramp is 30 feet wide and has two lanes, which can accommodate small to medium-sized boats. The ramp is also ADA-accessible, ensuring that it can be used by individuals with disabilities.

The 6th Avenue Southeast boat ramp services Black Lake, which is a popular recreational lake in Thurston County. Black Lake covers an area of 560 acres and has a maximum depth of 47 feet. It is a popular destination for fishing, boating, and swimming.

The type of watercraft allowed on Black Lake includes motorized boats, canoes, kayaks, and paddleboards. However, there are restrictions on the speed of motorized boats, and water-skiers are not allowed on the lake.

In summary, the 6th Avenue Southeast Thurston County boat ramp is a public facility that services Black Lake in Washington. It is 30 feet wide, has two lanes, and can accommodate small to medium-sized boats. Motorized boats, canoes, kayaks, and paddleboards are permitted on the lake, but water-skiers are not allowed.