This is actually on Mountain blvd near all the potholes near the preschool on joaquin miller court

Actually this is broken glass that has been there for well over a month now. It looks like a large plate glass window was dropped here. It is located on Mountain Blvd. as you head into Montclair Village from the Woodminster area. You'll spot it right before you get to the Sequoyah Lodge. Be careful walking your dog there, it's quite dangerous and now some leaves are partially covering it so harder to see but there are still very dangerous large shards of glass.