GENERAL34738 - Laserfiche WebLink

Home Browse Search

A topsoil amendment program will be initiated if visual observation or annual vegetation moni[oring indicates symptoms of nutrient deficiency within reclaimed vegetation stands. Generally, native species are adapted to the fertility levels of the replaced topsoils, and fertilization has not been shown to be of significant long term benefit in the region. Since the initial permanent reclamation was completed in 1994, fertility evaluations described in the reclamation plan will be initiated in 1997. V. Sealing of Drilled Holes and Underground Openings All exploration, drill or boreholes, wells, or other underground openings except those used solely for surface blasting will be plugged or sealed to prevent acid or toxic drainage form entering the groundwater, minimize disturbance to the prevailing hydrologic balance, and ensure safety. Details of the sealing plan are located in Tab 18, Volume 12 of the permit application package. No variance from regulatory requirements regazding sealing has been requested or proposed for approval, and no such specific findings apply. The Division requires that each hole, well or underground opening be capped, sealed, backfilled or otherwise properly managed (4.07.3). VI. Use of Explosives Explosives will be used to fragment overburden and exposed coal at the Seneca II-W Mine. Seneca Coal Company typically will use ammonium nitrate and fuel oil (ANFO) for this purpose, primed with cast primers and detonated with detonating cord. A certified blaster will be in chazge of all blasting operations to ensure compliance with State and Federal laws. Additional information regazding planned blasting operation is located in Volume 11, Tab 14 of the permit application package. Seneca submitted a revision to the permit application to establish maximum allowable ground vibrations from blasting, as a result of damage to private property, including oil tanks and an oil well. Seneca will maintain peak particle velocities at the oil well site of five inches per second (ips) or less, and will utilize a seismic monitor at the well site to verify maximum peak particle velocities. Seneca also increased the bore hole column stem in azeas where mud seams aze encountered in the upper strata. These plans are implemented within 1,000 feet of the Meridian Oil Well. VII. Backfilling and Grading The application states that the mining plan for the Seneca II-W Mine was developed in conjunction with the Seneca II Mining Plan. The pit progression design was based on standard mining practices, tried and proven at the analogous Seneca II Mine. The backfilling and grading plan is found within Volume 13, Tab 20. The reclamation schedule, including a request for a variance from the contemporaneous reclamation requirements of Rule 4.14 is contained within Volume 12, Tab 19. Seneca II-W Findings Document 34 November 3, 1999