(click to enlarge) It is critical that the ice quality or type of ice is evaluated before you travel.
Clear hard, new ice is the only kind of ice recommended for travel.
Avoid Ice on or near moving water (ie. Rivers, Currents) Ice that has thawed and refrozen Layered or rotten ice caused by sudden temperature changes
Slushy Ice (Other risk factors that weaken or "rot" ice:) Snow on ice that acts as a blanket to prevent hardening of ice Pressure ridges due to wind or current pressure