Both Lowell feeds are online at the moment. There is no way to reset it back to online so to say.
When a feed is “Offline” there could be many reasons for this. The majority of the time the provider is having technical difficulties with his/her feed such as power, scanner, PC, or internet failure, or they are updating software/hardware. It may even be a server issue at Broadcastify but this is very rare.
When a feed goes offline, the volunteer that provides it is notified automatically of this by e-mail (for that reason, you cannot submit problem reports for feeds that are “Offline”

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If a feed remains “Offline” for at least 3 weeks it will automatically be "Deleted" by the system, once this happens it will no longer be listed in the directory.