Delaware: The entire state.

Pennsylvania: The North side of the Susquehanna River embracing Peachbottom North, Muddy Run Hydro-Electric Station; Wakefield, Following Rt. # 372 to Coatesville, PA. Follow Rt. #30 out of Coatesville to Rt. #113 above Downingtown. Rt. #113 to Rt. #100 North to Rt. #401 (#100 and #401 intersection). Follow Rt. #401 South to Rt. #30 West. Follow Rt. #30 West to Rt. #352 is Local #451 territory. Everything West of 1-95 to Trainer (PA) belongs to Local #451.

The city of Chester is neutral territory under the jurisdiction of Locals #401, #161 and #451. Contractors having a job may hire 50% of the men from Local #451.

Trainer, PA from the Chester City Line to the Delaware River and back into Delaware is Local #451 territory.

Maryland: The North Side of the Susquehanna embracing all Cecil County; which includes Galena, North East, Charleston, Perryville, Port Deposit, Oakwood, and Elkton.