Reserve Silica Quarry, Reserve Industries, Ravensdale, Washington
The Reserve Silica Quarry had operated since the late 1960s producing silica sand for glass manufacturing. The site had long since mined past its originally permitted boundaries by the time Mr. Bennett became involved with the operation in 2001. King County, under its 5-year review authority, mandated that updated permits be obtained for the site. Mr. Bennett, with a team of other engineers and scientists prepared a comprehensive document that fulfilled the requirements of King County. Studies included wetland and sensitive areas, traffic, noise, and slope stability, as well as a comprehensive hydrogeologic investigation by Mr. Bennett. An updated surface mine reclamation permit was also prepared for Washington DNR and an NPDES permit for Washington DOE.
Deepening the pit at Reserve Silica. Note the steeply dipping coal seams
Cascade Quarry, Resource Land Holdings, Gold Bar, Washington
The Cascade Quarry had operated as the Miller Lime Quarry since the 1930s. The site had been given a notice of correction order by DNR in 2004 for mining outside its permit boundaries and for mining practices that could lead to an unsafe site. Subsequent to the compliance orders the site was purchased by the present owner and Bennett Consulting became involved in early 2007. Mr. Bennett prepared a revised integrated mine and backfill plan that included systematic mine benching and reclamation of out-of-permit mined areas. After reviewing the revised mine plan Snohomish County granted a grandfathered non conforming use approval for the site. With County approval a revised DNR surface mine reclamation permit and DOE NPDES permit were prepared for the site.
Systematic mine bench development now taking place at Cascade Quarry
White River Aggregates Quarry, Glacier Northwest, Enumclaw, Washington
Mr. Bennett completed the geologic characterization and stratigraphic analysis for the development of the White River Aggregates quarry. Within the project area, two of the distinct volcanic units identified at the site were judged suitable for rock quarry operations and further testing. Follow up drilling was carried out in the most favorable areas for quarry development and the site has now been in production for nearly 12 years.
Mats Mats Quarry, Glacier Northwest, Port Ludlow, Washington
Mr. Bennett completed a geologic characterization and reserve estimation of an existing quarry operation for a proposed expansion. Stratigraphic and structural geologic mapping was completed to direct hydrogeologic testing and modeling. The site is located on a small rock peninsula with operations extending to below tidewater. The geologic studies indicated that the site could be safely developed and that expansion would not also impact neighboring water wells.
Cedar River Watershed, City of Seattle, North Bend, Washington
The City of Seattle maintains a number of rock quarries and gravel pits at their Cedar River Watershed for internal use on their existing road system. Mr. Bennett designed long term development and reclamation plans for the active mine sites so that they would meet DNR reclamation requirements as well as MSHA safety guidelines
Castle Rock Kaolinite Quarry, Ash Grove Cement Company, Castle Rock Washington
This claystone quarry had been in production on an intermittent basis since the 1930s, however the site had never been permitted by either County or State agencies. Mr. Bennett designed and supervised the final reclamation of the site so that it could revert to forest production. Following reclamation DNR personnel were brought to the site and they provided written documentation to the landowner that the reclamation met State Standards.
Sunset Quarry, C. Wyss and Sons, Wilkeson, Washington
Mr. Bennett served as the project manager for the development of a new aggregate quarry and gravel mine in Pierce County, Washington. Permits included a County Conditional Use Permit, Mineral Resource Rezone, a DNR surface mine reclamation permit and DOE NPDES permit.
Lummi Island Quarry, Ace Rock, Lummi Island Washington
Mr. Bennett completed a rock slope stability analysis of this operation at the request of DNR mine inspectors. At this site steeply dipping, foliated, marine basalt rocks had been undermined at the base of a mine highwall to the point of risking rock slope failure. An analysis of failure planes was carried out with recommendations provided for systematic mine bench development, along with backfilling recommendations for the undermined areas.
WASHINGTON STATE SURFACE MINE RECLAMATION PERMITS FOR OTHER MINES
Mr. Bennett prepared surface mine reclamation permits for the following operations in Washington State for the Department of Natural Resources:
Far Point Sand and Gravel Mine, Resource Land Holdings, Granite Falls, Washington
Bear Creek Gravel Mine, Peninsula Topsoil, Belfair, Washington
Franklin Ridge Gravel Mine, Interwest Construction and Development, Enumclaw, Washington
Hope Creek Quarry, Rock Services, Inc., Chehalis, Washington
Meridian Hill Quarry, The Agnew Company, Centralia, Washington
Lake Francis Sand and Gravel Mine, Quality Rock Products, Maple Valley, Washington
Littlerock Sand and Gravel Mine, Quality Rock Products, Olympia, Washington
Maytown Aggregates, Citifor, Maytown, Washington
Dallesport Rock Pit, Port of Klickitat, Dallesport, Washington
Snoqualmie 5-Mile Pit, Hos Bros. Construction, Woodinville, WA
Riverscene Sand and Gravel, Wilder Construction, Granite Falls, Washington
Quincy Rock Sand and Gravel, Interwest Development, Quincy Washington
Cedar Mountain Gravel Mine, Procon Construction, Maple Valley, Washington
INDUSTRIAL SILICA QUARRIES ON FEDERAL LAND
Mr. Bennett has directed the development of the following industrial silica mines in Nevada
Kramer Hill Silica Quarry, James Hardie Building Products, Golconda, Nevada
Stone Corral Silica Quarry, James Hardie Building Products, Humboldt County, Nevada
Lucky Boy Silica Quarry, James Hardie Building Products, Mineral County, Nevada
METAL MINES AND OTHER PROJECTS
Red Top and Combination Gold Mines - Red Rock Mining, Inc. Goldfield, Nevada
Mr. Bennett directed the design and development of two open quarry gold mines in the Goldfield District of western-central Nevada. The development work included exploration and delineation drilling, ore reserve estimations, mine planning and metallurgical testing. The day to day operations work consisted of surveying, drilling and blasting, assaying, ore/waste extraction, crushing and agglomerating of gold ore, followed by gold recovery using an activated carbon/electrowin circuit. Gold dore was poured on site and sold to a refiner. Exploration drilling, reserve estimations, metallurgical testing and economic evaluations were also conducted on neighboring prospects and elsewhere in western Nevada.
Winston Lake Mine Corporation Falconbridge Copper, Schreiber, Ontario, Canada
Mr. Bennett was part of a geologic team directing the surface and underground delineation drilling of a polymetallic massive sulfide Cu-Zn-Ag-Au orebody to determine the economic viability of an underground mining operation. The program successfully outlined four million tons of sulfide ore that was placed into production at a rate of 2,000 tons per day. The complex sulfide ore was concentrated on site using a conventional flotation mill, with concentrates sent to eastern Canada for smelting.
Green Mountain Prospect Nevcan Exploration, Mariposa County, California
Mr. Bennett directed the delineation drilling of a five million-ton polymetallic massive sulphide occurrence in the southern Sierra foothills of California. The prospect has never been developed due to environmental permitting considerations.
Shadow Mountains Tungsten Skarn Prospect Nevcan Exploration, Mojave County, California
Mr. Bennett supervised the geologic mapping, geophysical and lithogeochemcial surveys, and follow-up percussion drilling of a scheelite skarn deposit near Victorville, California. The program delineated a near surface, approximate half million ton orebody that was amenable to open pit surface mining methods.