UTAH. ONTARIO.— From the Salt Lake Herald we learn that the completion of re-pairs on the Ontario mill has been delayed beyond expectation. It is now thought that the mill will start up on the 17th, in which event the run will be a long and steady one, while the precious production will be greater, as the capacity for reducing the ore has been enlarged. Dead-work is still in progress in the mine, and will be for a few days after the mill starts up, as there is now so much ore in the ore-houses that until room has been made no more can be taken out of the mine. At that time, however, everything will resume its accustomed liveli-ness and industry. The Park County Mining Record says of this mine : There are now 4000 tons of ore in the ore-houses at the mine and mill that will average $125, making half a million in round numbers. Drawings are being made for a Cornish plunger, with a capacity of 2000 gallons per minute. PARLEY'S PARK.— The same paper says the Parley's Park shaft is going on finely. The shaft is down a distance of over 280 feet, and is going down at the rate of three feet per day. A new plunge-bucket has been telegraphed for, which will keep the shaft clear of water until a depth of 600 feet has been attained, which is the amount contracted for. FAIRVIEW.— The Park County Mining Record of the 8th says : The Fairview incline is down over 150 feet. The vein is eighteen inches and widening, sam-pling $18 to $20, and improving lately. On Wednesday, a narrow seam of high-grade ore came in, and has been improving with every foot. The vein has a very healthy appearance. The quartzite horse has nearly disappeared, and the prospect ahead is brilliant. EMPIRE.— The same paper says of this mine : On May 2d, the vein on the 300 level of the Empire was reached, but, before much progress could be made toward cross-cutting it, water came in so rapidly that the miners were driven back and the drift flooded. A perfect deluge poured down the shaft to the 400 station, covering the floor to the depth of fifteen inches. The pumps were started and the tank kept at work, but it took forty-eight hours to clear it. The 200 and 300 drifts were immediately bulkheaded, and are now nearly full of water. The pumping at the 300 station is draining the water from the 200 level, proving the vein continuous, even if it had not been cut into.