The umbrella insurer was required to drop down when the primary carrier's policy only covered the additional insured when it was vicariously liable for the named insured's operations. Am. States Ins. Co. v. Ins. Co. of the State of Pa., 2020 U.S. App. LEXIS 585 (9th Cir. Jan. 7, 2020).
Sierra Pacific Industries and Howell's Forest Harvesting were sued for damages caused by the Moonlight Fires. Howell was insured by American States. Sierra was an additional insured under the American States policy, but only to the extent that Sierra was vicariously liable for Howell's operations. Sierra was insured under an excess and umbrella policy issued by Insurance Company of the State of Pennsylvania (ICSOP).
Because American's policy did not extend to Sierra's potential non-vicarious liability for the property damage caused by the fire, there was a gap in the scope of American's defense obligation in the underlying suits. The district court noted that when claims were covered by an umbrella policy but not by the underlying primary policy, the umbrella insurer dropped down to provide primary coverage.
Further, because American and ICSOP shared the same level of obligation on the same risk for the same insured, and American undertook its defense duty while ICSOP did not, the district court correctly held American was entitled to equitable contribution of defense costs from ICSOP.
In addition to providing excess coverage, the ICSOP policy included an umbrella clause providing that ICSOP would cover "the total of all damages" resulting from property damage "covered by the [ICSOP] policy but not covered by an underlying policy." The ICSOP policy also created both excess and umbrella defense obligations. Its umbrella defense obligation provided that ICSOP had a "duty to defend any claim or suit seeking damages covered by" the ICSOP policy "but not covered by any underlying insurance." Since the American policy provided for a duty to defend only with respect to Sierra's vicarious liability, the district court correctly determined that the ICSOP had a duty to drop down and defend the underlying suits in a co-primary capacity with American.
In apportioning defense costs, the district court determined that the most equitable approach was to split costs equally between American and ICSOP. This was not an abuse of discretion.
Finally, the district court should have awarded prejudgment interest to American. The case was remanded with an instruction to award prejudgment interest to American.