An abnormal ground condition is any casual water , ground under repair or hole, cast or runway on the course made by a burrowing animal , a reptile or a bird. A burrowing animal is an animal that makes a hole for habitation or shelter, such as a rabbit, mole, ground hog, gopher or salamander. A hole made by a non- burrowing animal , such as a dog, is not an abnormal ground condition unless marked or declared as ground under repair . Casual water is any temporary accumulation of water on the course which is visible before or after the player takes his stance and is not in a water hazard . Snow and natural ice, other than frost, are casual water or loose impediments , at the option of the player.
Manufactured ice is an obstruction .
Dew and frost are not casual water . A ball is in casual water when it lies in or any part of it touches the casual water . Ground under repair is any part of the course so marked by order of the Committee or so declared by its authorized representative. It includes material piled for removal and a hole made by a greenkeeper, even if not so marked. All ground and any grass, bush, tree or other growing thing within the ground under repair is part of the ground under repair .