Based on the available information, the boat ramp named WA 17 Grant County is located at latitude 47.47509384 and longitude -119.5182724 in Washington State. This boat ramp is a concrete ramp that provides access to the Columbia River, which is a major river that flows through the Pacific Northwest region of North America.

The width of the boat ramp is not specified in the available information, but it is likely to be a standard width for a concrete ramp that can accommodate various sizes of boats. It is also not clear if the boat ramp has any additional amenities like a dock or a parking lot.

The Columbia River is a large and complex river system, and the specific section of the river that the WA 17 Grant County boat ramp services is not specified. However, the Columbia River is known for its diverse range of watercraft, including motorized boats, kayaks, canoes, and paddleboards.

According to the Washington Department of Fish and Wildlife, the Columbia River is home to a variety of fish species, including salmon, steelhead, and sturgeon. The department also regulates fishing on the river, and there are specific fishing seasons and regulations that apply to each species.

In conclusion, the WA 17 Grant County boat ramp is a concrete ramp that provides access to the Columbia River in Washington State. The width of the ramp is not specified, but it is likely to be a standard width that can accommodate various sizes of boats. The Columbia River is a major river system that supports a diverse range of watercraft, fishing, and wildlife.