Estate of Olsen v. Agtegra Cooperative
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In October 2014, while guiding a hunting party on their property, the Olsens' son observed a crop duster spraying herbicide, which allegedly damaged the Olsens' ponderosa pine trees. The Olsens claimed the herbicide caused significant damage and death to the trees. They filed a lawsuit against the Defendants, who argued that expert testimony was required to prove causation. The circuit court granted summary judgment in favor of the Defendants, leading to the Olsens' appeal.
The Circuit Court of the Fifth Judicial Circuit in Spink County, South Dakota, reviewed the case. The court found that without expert testimony, a jury would be left to speculate about the cause of the damage to the trees. The court noted that the fields of chemistry, botany, and agronomy were beyond the understanding of a typical layperson. Consequently, the court granted summary judgment, dismissing the Olsens' complaint in its entirety.
The Supreme Court of South Dakota reviewed the appeal. The court affirmed the circuit court's decision regarding the need for expert testimony to establish causation for the damage to the trees. However, it reversed the summary judgment on the claims of trespass, statutory nuisance, and common law nuisance, noting that these claims do not require proof of damages to survive summary judgment. The court remanded these claims for further proceedings, allowing the Olsens to potentially recover nominal damages. The court affirmed the summary judgment on the claims of promissory estoppel and civil conspiracy due to the lack of evidence on causation for damages.
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