During his daily wanderings through field and forest, he also noted when migrating birds returned, when leaves burst forth on trees, and when the ice melted on Walden Pond. Some 160 years later ...

and it's the "safest option" in order to manage water levels as snow begins to melt in the spring. The update says a leak from a containment pond at the site reported in late December caused ...

The Yukon government says about 3,000 cubic metres of water will be released each day until the new pond is ready, and it's the "safest option" in order to manage water levels as snow begins to melt ...