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After conducting research, I was unable to find any specific information about a boat ramp named Farm to Market Road 270 999 in League City, Texas. It is possible that the ramp has a different name or that it is a small, lesser-known ramp that has not been documented online.

Without more information, it is impossible to determine what kind of boat ramp it is, how wide it is, what body of water it services, or what kind of watercraft are permitted on the water. However, it is likely that the ramp services a nearby body of water, such as Clear Lake or Galveston Bay, and that it is open to a variety of boats, including fishing boats, pleasure boats, and kayaks.

In order to verify accuracy, it may be necessary to reach out to local authorities or boating organizations in the League City area. They may be able to provide more information about the ramp and its specifications.