Good news for Green Lake: It’s clean and staying that way. Efforts in 2004 to reduce algae growth in the lake by adding aluminum sulfate, or alum, are still paying dividends.

S-1805 (Normanskill Chert): Gravle pit west side of Rt. 9 W; North of Catskill, past the rocket sign. Normanskill Chert is also known as Coxsackie, Deepkill, Flately Brook Flint, Hudson, River, Mt.