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Well Logs

On October 1, 1999, new Alaska Drinking Water Regulations became effective. In this revision the Alaska Department of Environmental Conservation adopted well log requirements currently found in the Department of Natural Resources regulations. 18 AAC 80.210 (h) identifies 18 items that must appear on a well log in order to be accepted for a drinking water system. This subsection from the regulation is quoted below: 

The well logs for a well intended to serve a public water system, including wells not in operation but that are connected to the public water system on a standby basis for purposes such as fire protection and emergencies, must be submitted to the department within 30 days after the construction of the public water system. The well log must contain the following information as applicable:

  • the method of construction;
  • the type of fluids used for drilling;
  • the location of the well;
  • an accurate log of the soil and rock formations encountered and the depth at which the formations occur;
  • the depth of the casing;
  • the height of the casing above ground;
  • the depth and type of grouting;
  • the depth of any screens;
  • the casing diameter;
  • the casing material;
  • the depth of perforation or opening in the casing;
  • the well development method;
  • the total depth of the well;
  • the depth of the static water level;
  • the anticipated use of the well;
  • the maximum well yield;
  • the results of any well yield, aquifer, or drawdown test that was conducted;
  • if the water well contractor or person who constructs the well installs a pump at the time of construction, the depth of the pump intake and the pump performance data.

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