Well Log
Definition
A well log — sometimes called a driller’s report or well completion report — is the legal and technical record of a well’s construction. In Idaho, licensed drillers are required by law to file a well log with IDWR after completing any new well. The log documents the well’s location (legal description), total depth, casing type and depth, grouting details, geological formations encountered during drilling, static water level at the time of completion, and the well’s initial water yield in gallons per minute (GPM). Well logs are public records and are searchable through the IDWR well log database, making them a valuable research tool for estimating depth and yield on neighboring properties.
Frequently Asked Questions
Why Well Log Matters
How Trident Drilling Company Uses It
Trident Drilling files all required well logs with IDWR upon project completion as part of standard compliance practice. The company also references existing IDWR well log records for neighboring properties when estimating depth and geological conditions for new drilling projects.