Manufacturer will begin long process of shutting down Riverside operations

Knappco Inc. is shutting down its production operations and trimming its workforce in Riverside, according to a recent Worker Adjustment and Retraining Notification (WARN) Act notice filed with the state.

According to the filing, Knappco will lay off 58 employees at its 4304 N. Mattox Road facility. The company specializes in products for petroleum, chemical and dry bulk cargo tanks that help safeguard against spills, overfills and fugitive emissions.

The company, a subsidiary of Ohio-based OPW,…

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