After conducting research, it appears that the boat ramp named Wycoff Street Johnson County in Kansas is located on the northeast corner of the Wyandotte County Lake, which is a 400-acre lake. The boat ramp is open year-round and is operated by the Johnson County Park and Recreation District.

According to the official website of the Johnson County Park and Recreation District, the Wycoff Street Johnson County boat ramp is a concrete boat ramp that is 16 feet wide and 90 feet long. It is capable of accommodating small boats and watercraft, such as canoes, kayaks, and small fishing boats.

The Wyandotte County Lake is a popular destination for fishing, boating, and other water sports. It is a well-stocked lake that is home to a variety of fish species, including bass, crappie, catfish, and bluegill. The lake is also surrounded by beautiful parks and hiking trails, making it a popular spot for outdoor enthusiasts.

In summary, the Wycoff Street Johnson County boat ramp is a concrete ramp that is 16 feet wide and 90 feet long. It services the Wyandotte County Lake in Kansas and is capable of accommodating small boats and watercraft. The lake permits various recreational activities, including fishing, boating, and hiking.