Missouri Revised Statutes Title XXI. Public Safety and Morals § 319.035. Compliance with law still requires excavation to be made in careful and prudent manner--failure to give notice or mark facilities, rebuttable presumption of negligence

1. Obtaining information as required by sections 319.010 to 319.050 does not excuse any person making any excavation from doing so in a careful and prudent manner.

2. Nothing in sections 319.010 to 319.050 shall relieve an excavator from the obligation to excavate in a safe and prudent manner, nor shall it absolve an excavator from liability for damage to underground facilities.

3. The failure of any excavator to give notice of proposed excavation activities as required by this chapter shall be a rebuttable presumption of negligence on his or her part in the event that such failure shall cause injury, loss, or damage. In addition to any penalties provided herein, liability under common law may apply.

4. The failure of an underground facility owner to mark his or her facilities that are located in an area of excavation described in a notice of intent to excavate received by the underground facility owner, as required by section 319.030, or the failure of an underground facility owner to be a notification center participant, consistent with the provisions of section 319.022, shall be a rebuttable presumption of negligence on the part of such owner in the event that such failure shall cause injury, loss, or damage. In addition to any penalties provided herein, liability under common law may apply.