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' FOURTH ANNUAL TOPSOIL AND SPOIL MONITORING REPORT <br /> ' 1989 FIELD SEASON <br /> Introduction <br /> Peabody Coal Company is required by the Colorado Mined Land Reclamation Division (CMLRD) <br /> to monitor replaced topsoil and final graded spoil at Seneca II Mine. Monitoring programs <br /> include verifying topsoil replacement depths, determining final graded spoil quality, <br /> determining topsoil fertility, and completing an annual topsoil balance and redistribution <br /> plan. This report presents the topsoil and spoil monitoring data for the 1989 calendar <br /> ' year. <br /> Soil Pit-Topsoil Fertility-Revegetation Monitoring Data <br /> Topsoil and spoil fertility samples are collected periodically from shallow postmine soil <br /> pits which are placed near representative revegetation monitoring sites. The postmine <br /> soil pits are also used to evaluate plant rooting depths and to compare topsoil/spoil <br /> profile data with site specific revegetation data. <br /> Postmine soil pits are placed within reclamation blocks that have been topsoiled and <br /> seeded for a minimum of three years. Similar minimum time frames are used for monitoring <br /> postmine vegetation. The permanent vegetation has generally established sufficiently <br /> after three to four years to evaluate interactions between rooting depth and topsoil/spoil <br /> quality (Schafer et. al ., 1979). <br /> No topsoil or spoil samples were collected from shallow postmine soil pits during the 1989 <br /> ' field season. Historical topsoil and spoil quality data for the 1983 through 1986 <br /> reclamation blocks are presented and discussed in the Topsoil and Spoil Monitoring reports <br /> ' for the 1986 and 1988 field seasons. Representative revegetation sites from reclamation <br /> years 1987 and 1988 are scheduled to be sampled during either the 1990 or 1991 field <br /> season and the data will be presented with the Fifth or Sixth Annual Topsoil and Spoil <br /> Monitoring Report. <br /> Spoil Sampling in the Lennox Highwall Reduction Area <br /> ' No final grading was completed in the Lennox highwall reduction area during the 1989 field <br /> season. Therefore, no spoil samples were collected to determine sodium levels. <br /> ' PEABODY COAL COMPANY <br /> 1 Western Divislon <br />