Silicon Int'l v. Monsanto Co.
Annotate this CaseMonsanto, through a wholly owned subsidiary, owns a quartzite mine near Soda Springs. Monsanto and Washington Group International, Inc. (WGI) contracted with each other for WGI to operate the mine. This agreement was memorialized in an agreement set to expire at the end of 2002. A by-product of WGI's operations was silica sand. Silicon International Ore, LLC (SIO) contacted Monsanto about acquiring the sand. SIO presented Monsanto with a proposed contract, but that contract was never executed. However, Monsanto and WGI executed an Addendum to the agreement that authorized WGI to construct and operate a processing facility for silica sand at the quartzite mine and to pay Monsanto royalties for silica that was sold by WGI to a third party. SIO and WGI executed a Master Agreement, under which WGI agreed to provide silica sand to SIO; SIO agreed to pay for the construction of the processing facility for the silica sand; SIO agreed to pay WGI to dry, screen, and bag the silica sand; SIO agreed to pay WGI an additional amount for processed sand; and WGI agreed to load the bagged silica sand onto SIO trucks. Shortly before the First Quarzite Agreement was set to expire, Monsanto and WGI executed a second Quarzite Agreement and addendum. The Second Addendum was almost identical to the First, but provided that WGI would pay Monsanto different amounts for sand based on several considerations and that the "[t]itle to the silica sand sold by SIO shall pass directly from [Monsanto] to SIO upon processing . . . subject to payment." WGI notified SIO that it would no longer be providing SIO with silica sand after the end of the year. After discussions with SIO, SIO was permitted to continue processing and bagging sand through April 29, 2008. SIO dismantled its operations in the quarry and removed its building and equipment. The following year, SIO sued Monsanto and WGI for damages for violating and interfering with an alleged verbal agreement to continue processing silica sand. SIO alleged that it and Monsanto entered into a verbal agreement separate and apart from the Master Agreement for the sale of silica sand. SIO asserted breach of the alleged verbal agreement, breach of the implied covenant of good faith and fair dealing, equitable estoppel, and quasi-estoppel. Monsanto denied SIO's claims and asserted the statute of frauds as an affirmative defense. Against WGI, SIO claimed that WGI breached the covenant of good faith and fair dealing implied into the Master Agreement, and SIO alleged that WGI tortiously interfered with the alleged verbal agreement between SIO and Monsanto. Monsanto and WGI moved to dismiss, which were ultimately granted by the trial court. Finding no reversible error, the Supreme Court affirmed.
Some case metadata and case summaries were written with the help of AI, which can produce inaccuracies. You should read the full case before relying on it for legal research purposes.
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.