It was formerly navigable up to moorings at Berkeley, but a flood-prevention scheme, built in the 1960s, now prevents navigation more than a few hundred meters upstream.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request. ### Instruction: List the MITRE techniques contained in the text. ### Input: It was formerly navigable up to moorings at Berkeley, but a flood-prevention scheme, built in the 1960s, now prevents navigation more than a few hundred meters upstream. ### Response: .