PERMFILE139803 - Laserfiche WebLink

Home Browse Search

-iiiiiiiiiiiiiiu iii sss Doc Date:12H 112001 • Rule 4-t S j~E: 4.15 REVEGETATION All revegetation was performed in compliance with plans approved by the MLRD. Vegetation- related issues addressed since the January 1987 permit renewal are summazized in the table below. Section 2.05.4(4) describes all revegetation programs conducted at the mine. Previous permit reviews conducted by the MLRD found reclamation operations to be in compliance with the requirements of Rule 4.15. Monitoring of revegetation success has been conducted periodically since 1987. Vegetative productivity data collected Erom reclaimed areas in 1990 indicated successful establishment of revegetation according to the criteria for evaluating Phase II band release success ac the H-G mine. Specifically, the 1990 data demonstrate chat: • The weighted mean of percent cover Eor the reclaimed area (64.4%) is greater than the weighted mean for the reference area (59.79'0); and, • Species diversity on the reclaimed areas meets the diversiry standard for HG that relative cover for three herbaceous species not exceed 75% and that any one species should not exceed 40% cover. Further discussion of revegetation results is provided in the following section. • 4.15.7 Determining Revegetatian Success: General Requirements and Standards HGCC determined that reference areas would be used to evaluate revegetation success. Prior to commencing the reference azeas study, a tour of the mine and potential reference areas was made on June 16 1980, by the following individuals: Ms. Carol Pahlke and Mr. Jim Herron, Reclamation Specialists, MLRD; Mr. Cass Legal of HG Coal Company; Mr. Larry Jackson, Environmental Engineer for Yampa Mining Company; and Mr. David Duba, Environmental Engineer for Morrison-Knudsen Company The purpose of the tour was to identify suitable reference areas and determine the necessary information to be collected in the reference areas study. Prior to initiation of the study, a second meeting was held at the MLRD offices in Denver on July 25, 1980 with the same people in attendance. The purpose of this meeting was to review the proposed scope of work with the regula[ory personnel. Measuring techniques were discussed to inrure consistency in sampling methodology. It was decided that measurement techniques used on the reference areas would be the same as those to be used to evaluate the success of revegetation on reclaimed sites. The initial reference area study is contained in 1/olume III, Section G, Subsection 2 of the initial permit application and is provided in Appendix C of this document. • During the initial permit term (1/4/82 to 1/4/87), several vegetation-related issues were addressed. Permit actions included resolution of two stipulations concerned with revegetation success criteria, development of a monitoring plan to evaluate revegetation success, and changes in the seed mixture TR-~-7 H: \ e l] V+IX M n V t N E F I S. H G 01/l)/9) 3:SBpm Wp51/ypl 4.15-1 Revised - 1/27/97