“Unless it’s below zero, we can drill,” says Waas. A tarp enclosing most of the boring machine’s operator station sheltered Feught from the wind, while a Torpedo heater at his feet blew warm air. The cold and heavy clothing made work arduous and slow. “The important thing is to add more bentonite when the mixture thins out, and that depends on the density of the rock.” The bore averaged 30 feet per hour and took a day. “The reclaimer has two screens, each with a shaker that distributes debris to the side for disposal,” says Waas. As the drill material returned to the bore pit in front of the machine, it was pumped to the reclaimer, which filtered fines from the bore and recycled the fluid. Workers added bentonite and water to the mud mixer, then pumped the drill fluid at 140 to 150 gpm through the drill pipe to rotate the mud motor. “The diameter seems like overkill for a 1.25-inch waste line, but if we went any smaller, the bits wouldn’t withstand the pressure and difficulty of drilling through rock,” says Waas. “To achieve that, we bored into the rock at 15 percent pitch and were 12 feet deep through the limestone bed before leveling off and boring 350 feet to the exit pit.” A stake with an orange flag driven into a snowbank marked the pit and served as a target for drill operator Eddy Feught.īoring required an 8-inch rock bit with three rotating carbide bits attached to a 20-foot mud motor (progressive cavity positive-displacement pump). “When drilling horizontally through rock, the pitch can change only 3 to 4 percent,” says Waas. When all were located, Feaker used his excavator with a frost hook to break through 36 inches of frozen soil and dig the 5- by 6-feet-wide bore hole 4 feet deep. Using the vacuum excavator with 1,200-gallon spoils tank and 5.5 gpm/3,500 psi water pump, the crew potholed to expose and verify the laterals and other lines. “The owner of the establishment wasn’t sure where the clean-outs were, and they were hard to find buried under the snow,” says Waas. The team’s biggest challenge was locating utilities, communication lines and laterals from the hotel and restaurant. Jammed together were a trailer-mounted, twin tank MCM-4000 reclaimer (American Augers), twin mud mixer and trailer-mounted vacuum excavator (Vermeer) and two flatbed trucks, each with 50 50-pound bags of bentonite. Staging the remaining equipment took up one lane of Front Street. “Boring on an angle added considerable distance and another day to the job.” “The closest we could get and still keep one lane open was an area just before the restaurant where traffic turned in off Front Street,” says Waas.
Vermeer Atlas Bore Planner series#
As soon as the machine was back on the mainland, the barge left.Ī restaurant, hotel, and other structures along James Street prevented vice president Randy Waas and his four workers from setting up the D100x120 Series II Navigator directional drill (Vermeer) directly across the canal from the house. After offloading the cargo, they dug a 10- by 6-foot-wide exit pit 8 feet deep at the back of the locktender house. Feaker workers loaded a spool of tracer wire, a spool with 500 feet of 1.25-inch DR9 HDPE tubing, and an excavator on the barge, then journeyed across the canal. The city had ferried equipment to the island with a barge and was preparing to pull it out before the river froze. The house received its first visitors during the project’s grand opening celebration in May. While wind, snow and temperatures in the teens and low 20s slowed the installation, it went as planned. General contractor Feaker & Sons Construction in Green Bay, Wis., subcontracted Waas Boring and Cable in Lomira, Wis., to drill under the river and through its limestone bed. The only way to connect the lavatories to the sewer was to use horizontal directional drilling. The Lower Fox River flowed past the west side of the island and over the dam. To the east, the lock’s canal separated the building from Voyageur Park on the mainland, and the sanitary sewer 50 feet away in a major thoroughfare. The house, built on a narrow dike called Government Island, had no septic system. The De Pere Lock and Dam are listed in the State Register and National Register of Historic Places.
The four-year Riverwalk and Wildlife Viewing Pier project undertaken by the City of De Pere, Wis., included renovating the unoccupied locktender house and adding public restrooms. Get Relining/Rehab articles, news and videos right in your inbox! Sign up now.