Project: Village of Baraga Raw Water Intake

Service: Submarine Pipelines

Location: Baraga, MI

Date: Fall 2011

Project Details: Constructed a new raw water intake pipeline extending 1200 feet from shore to a water depth of 38 feet. The pipeline was dredged using a Liebherr 944 excavator positioned on our 40’x70′ sectional barge. The pipeline and intake structure consisted of 18″ ductile iron ball and socket pipe; the pipe was pulled offshore and backfilled using our Manitowoc 3000W crane. After the project was underway it was realized that the existing lake bottom at the proposed intake structure location was not suitable to support the intake structure, therefore a redesign was required. McMullen & Pitz was asked for advice on a solution from the consultant; previous experiences provided the knowledge base to assist the consultant with a proven yet cost effective solution. The intake structure was ultimately supported on an HP10x42# pile driven some 90 feet below the lake bottom. Divers attached the intake structure to the pile and checked the entire pipeline installation with underwater video documentation. The video showed another quality project completed by the McMullen & Pitz crew.