Grinnell Mutual Reinsurance Co v. Great Lakes Insurance SE, 34 F.4th 649

Background

MNDKK hired Dingmann Brothers to install a garage door; Dingmann’s subcontractor dry‑cut a concrete wall without dust controls, spreading dust throughout the building.
The dust was cleaned before testing, but samples from the originating wall tested positive for silica.
MNDKK’s insurer, Great Lakes, paid MNDKK’s claim for cleanup and property damage and sought subrogation from Dingmann; Dingmann’s insurer, Grinnell, refused to indemnify citing two policy exclusions for silica/silica‑related dust.
Grinnell filed a declaratory‑judgment action in federal court to confirm no duty to indemnify; the parties cross‑moved for summary judgment.
The district court granted summary judgment to Grinnell, ruling the silica exclusions unambiguously applied; the Eighth Circuit affirmed.
Procedural note: Dingmann settled the underlying state action via a Miller‑Shugart agreement; related garnishment proceedings were stayed pending this coverage ruling.

Issues

Issue	Plaintiff's Argument (Grinnell)	Defendant's Argument (MNDKK/Great Lakes)	Held
1. Did the dust contain silica (genuine factual dispute)?	Grinnell: wall testing showed silica; dust came from that wall, so silica was present in the dust.	Defendants: dust itself was not tested; dispute whether silica was actually in the cleaned dust.	No genuine dispute: experts tested and observed silica in the wall; defendants offered no contrary expert.
2. Does the cleanup provision exclude cleanup costs (comma/grammar argument)?	Grinnell: cleanup clause covers cleaning up, removing, or otherwise responding to or assessing silica or silica‑related dust; comma placement is meaningful and clause applies.	Defendants: comma allegedly misplaces "effects of," so clause covers only cleanup of the effects of silica, not cleanup of silica itself.	The court rejects defendants’ punctuation theory; the provision, as written, bars cleanup costs related to silica or silica‑related dust.
3. Does the property‑damage provision exclude the claimed property loss?	Grinnell: policy excludes property damage arising out of contact with, exposure to, existence of, or presence of silica or silica‑related dust.	Defendants: if the cleanup exclusion applies, the property‑damage exclusion should not also apply; claimed damage is cleanup‑related.	Both exclusions can overlap; no conflict with a coverage grant, so property‑damage exclusion also bars coverage.
4. Is there a sufficient causal connection between silica and the damages?	Grinnell: "arising out of" is broadly construed—loss of use and cleanup flowed from presence of silica‑related dust.	Defendants: cleanup was performed "without regard to" silica hazards, so causal connection lacking.	Causal nexus satisfied under Minnesota law: "arising out of" requires a broad causal connection and applies here; "without regard to" argument fails.

Key Cases Cited

Lexicon, Inc. v. ACE Am. Ins., 634 F.3d 423 (8th Cir. 2011) (de novo review of cross‑motions for summary judgment)
Henning Nelson Constr. Co. v. Fireman’s Fund Am. Life Ins., 383 N.W.2d 645 (Minn. 1986) (policies construed using plain and ordinary meaning)
Latterell v. Progressive N. Ins., 801 N.W.2d 917 (Minn. 2011) (same rule applies to exclusions)
Westfield Ins. v. Advanced Auto Transp., Inc., 11 F.4th 860 (8th Cir. 2021) (party claiming coverage bears burden; insurer bears burden to show exclusion)
George’s Inc. v. Allianz Glob. Risks U.S. Ins., 596 F.3d 989 (8th Cir. 2010) (overlapping exclusions permissible; no problem absent conflict with coverage grant)
In re SRC Holding Corp., 545 F.3d 661 (8th Cir. 2008) (insurers may draft overlapping exclusions as "belt and suspenders")
Murray v. Greenwich Ins., 533 F.3d 644 (8th Cir. 2008) ("arising out of" given broad meaning in exclusionary context)
Faber v. Roelofs, 250 N.W.2d 817 (Minn. 1977) ("arising out of" means causally connected)