Montana Department of Transportation:
Devastating rock slides damage highway 212 at 13 locations in 2005.
M.C. Donegan: Provided controlled drilling & blasting for new highway alignment into mountainside. Drilling rock bolts for permanent and temporary shoring at MSE Walls.
Finished project ahead of schedule, $ 6 million under budget with no accidents.
The Project received 8 National & State Awards.
M.C. Donegan: Provided controlled drilling, blasting, presplitting and rock bolting for the widening of State Road 119 through the city of Blackhawk, CO. Pre and post blast surveys of structures nearby and seismic monitoring of all structures of concern.
The city of Blackhawk only allowed the work to be performed from midnight to 8 a.m. so that it would not affect the city’s business during the day and evening. Crews loaded blast holes, and had the shots ready for initiation at sunrise every day for one year.
Crews are drilling presplit holes (background) and drilling for rock anchor systems.
Drilling production holes, (foreground).
Porphyry open-pit copper mine and processing facilities. This historical mine was among the first low-grade, open-pit copper mines in the world. Originally mined by Native Americans and later by Spaniards. The open-pit mine began production in 1910.
M.C.Donegan: Provides drilling, blasting, presplitting & pioneering services for mine operations.
Freeport McMoRan Copper & Gold: Chino Mine Operations, New Mexico.
M.C.Donegan Drilling presplit holes 50’- 110’ deep some angled up to 28 degrees.
M.C.Donegan crews Loading presplit holes.
M.C.Donegan Secondary drilling at electric shovel #34 operations.
The project was awarded Best Civil Project of the year in 1998. It was completed without a single accident, 5 months ahead of schedule and $1 million below the original estimate.
U.S. Army Corps of Engineers: The project was to enlarge the spillway and raise the crest of the dam.
M.C. Donegan: Provided drilling & blasting of 800,000 cubic yards, and pre-splitting over 1,000 feet long and 110 feet high.
EnCana Oil & Gas (USA) Inc: Road Construction alongside 3,000 foot bluff to access Piceance Highlands for Oil and Gas exploration, production, and servicing well sites and pipelines.
M.C. Donegan: Provided drilling, controlled blasting, and rock bolting along oil shale bluffs.
M.C. Donegan: Provided controlled drilling, blasting, presplitting, and pressure grouting for Phase 2 of the mine tailings dam in 2012. The rock type around the dam and spillway is a Graphitic Phyllite with Quartzite Zones.
Coeur spent $350 million to start the project. It took 18 years to permit the mine. A highly controversial project with 900 Environmental Studies. Ten Major Environmental Acts and Regulations. Ten Government Agencies. Ten separate stormwater management areas within the mining operations
Kensington Gold Mine is located on the northern end of the Juneau Gold Belt. The main mineral mined is Calaverite or gold telluride.
Production drilling Phase 2 of the tailings dam spillway. Because of the environmentally sensitive area, geotextile liner across the tailings dam, seepage water treatment plant and electrical equipment below, extra care was taken to avoid damaging anything with falling rocks from the drilling, blasting and excavation operations.
Controlled blasting of the tailings dam spillway. Small shots were performed with an average powder factor of 2.6 pounds of explosive per cubic yard of rock. Every shot was excavated to give relief for the next shot.
Presplit drilling phase 2 of the tailings dam spillway. Drilling three inch holes on three foot spacing between holes. The average depth was 20 feet with a split factor of .09 pounds of explosives per square foot.
Drilling holes and curtain grouting the rock in the foundation of the tailings dam.
JUALIN PORTAL to support underground gold mining operations.
M.C. Donegan performed drilling, blasting, and presplitting for a Federal Highway Administration flood recovery project. Stakeholders wanted presplit rock slopes with minimal half casts visible, for natural looking slopes. Production of riprap from blasting operations were used for river bank stabilization.
Slopes were designed on a ½ to 1, on 4’ to 5’ centers, with a 3.5” hole. Split factors ranged from .02 to .05 lbs/Sqft. The geology is primarily metamorphic rocks fairly weak in structure.
N-31 Project: N.E.C.A. needed this corner to be blasted back and presplit to make room for the new road.
M.C. Donegan: Provided controlled drilling, blasting, and presplitting.
Before picture of the rock to be blasted and presplit.
Rancho Vistoso Stone Canyon: Premiere Subdivisions, Championship Golf Course, Health & Fitness Facility nested in the Tortolita Mountains northeast of Tucson Arizona.
Controlled drilling and blasting techniques are used to protect the surrounding environment and leave an undisturbed natural landscape and unique wildlife to the Tortalita Mountains.
M.C. Donegan has been drilling and blasting roads, underground utilities and golf course features for over 12 years.
Williams Energy:$ 20 million dollar Wheeler Gulch road and tunnel
M.C. Donegan:Provided drilling, blasting and presplitting on the road and tunnel entrance and exit. The Wheeler Gulch road to the tunnel was built to reach the Piceance Highlands for exploration and production. Drill sites were built at switch back #1 and #3 on the haul road.
Start of Tunnel
Completed Tunnel
Switch back #1 Williams Energy drill site.
A. P. E. Williams Exhibit in Houston 2008
Williams Energy drill site, Wheeler Gulch Road, Switch back #3, Parachute, COThe top portion of this blasted rock slope was not presplit. During construction, management needed perimeter control solutions. M.C. Donegan developed presplitting techniques which had never been used in the oil shale in this region. The results were dramatic, as shown above.
Colorado Department of Transportation: Upper Narrows Tunnel, later named for some of the most difficult highway construction in recent years in Colorado.
M.C. Donegan: Provided controlled drilling, blasting, high scaling and rock bolting installations from crane and basket operations 24 hours a day while maintaining traffic control.
M.C. Donegan: Drilling brow bolts (tunnel spillings) for tunnel excavation operations.
The Klamath River dam removal project – the largest such effort in U.S. history – produced positive results almost immediately.
The $500 million project dismantled four hydroelectric dams along the 257-mile Klamath River, which originates near Klamath Falls, Oregon, and flows to California’s North Coast, where it empties into the Pacific Ocean.
