Project includes collection of sanitary sewage and industrial wastes from some 38 outlets; 7.75 mi of gravity sewers varying in diam from 10 to 84 in. in open cut and tunnel, 1.87 mi of force main, 3 creek crossings, 2 reservoir crossings, and two system pumping stations; capacity of intercepting sewer at its entrance to principal sewage treatment plant is 125 mgd.