Travel on the east side of the University of Notre Dame campus will be interrupted in coming weeks as the utilities department replaces pipes under Holy Cross and St. Joseph drives to upgrade the chilled water system that supports air conditioning for most of the campus.p. Work will begin Oct. 4 (Monday) along a 1,000-foot stretch of Holy Cross Drive from St. Joseph Drive near the power plant to the A15 parking lot adjacent to the University Health Services building, according to Paul Kempf, director of utilities.p. Disruptions will intensify Oct. 25 to 29 when a segment of St. Joseph Drive, the north-south road that extends to OShaughnessy Hall, also will be closed.p. Faculty, staff, students and visitors who drive to the center of campus from Juniper Road will have to change their routes and enter through either the Main Gate off of Notre Dame Avenue or Dorr Road off of U.S. 933. Those who park near Stephan Chemistry, OShaughnessy and other points along St. Joseph Drive will have access from the south end of that road near Notre Dame Stadium. The project will not close any of the Universitys major parking lots, but about 25 spaces in the northeast corner of Lot A15 and about 25 spaces on the west side of Lot A17 will be closed.p. Most of the Universitys air conditioning is supported by a chilled water system of mains and distribution pipes – 10.6 miles of them – that run underground. The upcoming project will replace 20- and 24-inch pipes with 36-inch pipes, effectively doubling the capacity of the system, according to Mark Hummel, chief mechanical engineer.p.