The Haines Borough will spend $242,000 to move the Letnikof Cove float another 17 feet offshore to keep it afloat during low tides.

Manager Mark Earnest said glacial rebound is causing the harbor floor to rise a foot every 10 years, meaning shallower waters for boats to dock in, especially during extreme low tide when some near-shore floats are high and dry.

“What happens is portions of that facility are not usable for periods of…