Independence combines municipal power generation with a federal ordnance plant — two of the highest- exposure industrial categories in Missouri.

Lake City Army Ammunition Plant (LCAAP) is documented at building level. Government ordnance plants ran their own steam and process systems and were maintained continuously, which is the pattern that produces sustained exposure for the in-house trades. Independence Power & Light — Blue Valley Station covers the city’s municipal generation. J.J. Brouk & Company appears as an industrial employer.

The trades that recur are insulators and pipe coverers, boilermakers, pipefitters and steamfitters, millwrights, electricians and plant maintenance staff.