Rock Products

MAR 2019

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56 • ROCK products • March 2019 ENVIRONMENT The San Rafael Rock Quarry, San Rafael, Calif., will restore about seven acres of lands at its operation, according to the Marin Independent Journal. A section of the eastern San Rafael quarry is no longer viable for mining and will be restored through a four-year process as part of a state requirement of the Dutra Group, which owns the business. The project will see up to 150,000 tons of material moved as part of the grading of about 300,000 sq. ft. of the northeast quadrant of the quarry. That will be followed by erosion and sediment con- trol measures, and the planting of new vegetation. The reclamation work was to have begun soon after Dutra submitted its work plan in 2014, but California red- legged frogs were found on site. The frog is listed as threatened under the federal Endangered Species Act and work was delayed to consult with the U.S. Fish and Wildlife Service. A plan is now in place to protect the species. Marin's public works department – which is the permitting agency for the quarry – will use Sonoma Technologies Inc. to monitor air quality during the reclamation project, including dust and emissions. The $250,000 contract for monitoring will cover the initial two years of the project. Based on the results of the monitoring, however, the contract may be extended. Dutra will reimburse the county for the cost. The San Rafael Rock Quarry is commit- ted to maintaining a good relationship with the community. Here are a few examples of the steps taken by the oper- ation to ensure that it remains a good neighbor: •  Restricted work hours on some of the more audible operations to weekday day-time hours. •  Implemented a daily street-sweeping of Point San Pedro Road. •  Installed a new truck wash station to reduce debris track-out onto Point San Pedro Road. •  Limited the amount of daily truck trips to and from the Quarry. •  Put into use the reduced noise back-up alarm systems on the trucks at the quarry. Reclamation Moving Forward at San Rafael Rock Quarry A former quarry in Tomkins Point, N.Y., may become a suc- cessful riverfront reclamation project. The Tomkins Cove Quarry, owned by Tilcon, ceased stone-mining operations in 2012. It sits on 199 acres imme- diately north of the Stony Point Battlefield and was mined about 280 ft. below the level of the Hudson River, which is about 300 ft. away from the quarry. Dan Walsh, a principal with Hudson River Resources, made a presentation at the Stony Point Town Board about his company's plan to reclaim and restore the site by filling the massive area with crushed brick and concrete retrieved from construction sites, according to SPACE - Stony Point Action Committee for the Environment. The material will be certified and shipped in by barge during a 16 to 20 year period to transform the abandoned mining operation into a Hudson Riverfront Greenway – expanding the Stony Point Battlefield Park with a permanent natural area public access that could include hiking trails, birdwatch- ing, environmental education, scenic views and other passive amenities, based on public input. • The project would use materials commonly used through- out the state in reclaimed properties, such as clean crushed concrete, crushed brick, rock, stone, and construction soil and fill. The company would chemically test any question- able material. "This is not a landfill," Walsh emphasized. "This is not garbage. It's very specific material." • The project would also create about 38 long-term jobs for highly skilled employees. The company would give prefer- ence to candidates from Stony Point and Rockland County. •  It would bring tax ratables to the town as an industrial site during that phase of operations. The company plans to rehabilitate the conveyor already on the site and the barge dock, both of which have fallen into disrepair. It also plans to rebuild roads within the quarry. • All of the material would come to the site via river barges so trucks would not clog the roadways. "In doing that, what we're accomplishing is removing literally millions of trucks from regional highways because this material would oth- erwise have to be trucked from construction sites," Walsh said. The company estimated that using barges, with two to four trips daily, would reduce fuel consumption by about 36 million gal. and reduce truck travel by about 170 million miles. Former New York Quarry May Get New Life

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