Spring Ice II
Ice safety tips (from Canadian Red Cross):
Many factors affect ice thickness including: type of water, location, the time of year and other environmental factors such as:
* Water depth and size of body of water.
* Currents, tides and other moving water.
* Chemicals including salt.
* Fluctuations in water levels.
* Logs, rocks and docks absorbing heat from the sun.
* Changing air temperature.
* Shock waves from vehicles traveling on the ice.
The colour of ice may be an indication of its strength.
* Clear blue ice is strongest.
* White opaque or snow ice is half as strong as blue ice. Opaque ice is formed by wet snow freezing on the ice.
* Grey ice is unsafe. The grayness indicates the presence of water.
Ice thickness should be:
* 15 cm for walking or skating alone
* 20 cm for skating parties or games
* 25 cm for snowmobiles.