The Coeur D'Alene, Idaho-based company said it would use proceeds from the offering, together with cash on hand, to redeem its 6.875% senior notes due in 2021.
JP Morgan is acting as the book-running manager for the offering.
Hecla had recently reported its highest ever silver, lead and zinc reserves, with respective increases of 11%, 5% and 8%, including adding 22% more at Greens Creek.
Shares in Hecla Mining (NYSE:HL) closed down Monday nearly 8% at US$3.16, valuing the company at $1.65 billion.
