S HIH Associates 622.33 Hill/Blaine nine L3hbarp Reclaaiation 1991? Project, Hill and Blaine Counties, northlestern nontana FINAL REPORT HILL/BLAINE MINE RECLAMATION PROJECT DSL-AMRB90-019 HILL AND BLAINE COUNTIES NORTHWESTERN, MONTANA T.31N., R.17E., SEC. 4 AND 5 T. 35 .N, R. 19 .E. , SEC . 19 T.31.N., R.19.E., SEC. 7 AND 8 HKM ASSOCIATES BILLINGS, MONTANA STATE* DOCUMENTS COLLECTION NOV 2 5 1991 MONTANA STATE LIBRARY HELEN1A5,15MEO.N6TtAhNAAVE5.9620 JANUARY 17, 1991 PLE iwL L U \ s i s 4 MONTANASTATELIBRARY S622.33L3hbmrp1991?C.1 Hill/BlaineMineReclamationProject,Hi 3 0864 00075031 8 1 ) TABLE OF CONTENTS PAGE INTRODUCTION 1 . 1 . Site Description 1 1 . 2 Maps Showing Mine Locations 1 1 . 3 Project Objectives 6 RESPONSIBILE PARTIES 2 . 1 Contractor 7 2 2 Reclamation Plan 7 . 2 3 Engineering Plan 7 . 2 . 4 Quality Control Inspection 7 2 5 AMRB Coordination 7 . CHRONOLOGICAL LISTING OF EVENTS 3 . 1 Pre-Bid Conference 8 3 . 2 Bid Date 8 3 3 Two Lowest Bids 8 . 3 4 Contract Award 8 . 3 . 5 Notice of Award 8 3 . 6 Notice to Proceed 8 3 7 Construction Start-up 8 . 3 8 Change Orders 8 . 3 9 Work Stoppages 8 . 3 10 Requests for Payment 8 . 3.11 Substantial Completion 9 3.12 Final Completion and Approval 9 3.13 Final Payment ( s y 4 CONSTRUCTION . 4 1 Description of Project Plan 10 . 4 2 Major Equipment List 10 . 4 3 Contractor Employees 10 . 4 4 Construction Activities 10 . 4 5 Quantities Used 11 . PAYMENT REQUESTS 5 1 Pay Request 13 . 5 . 2 Cost Per Site 13 5 3 Total Project Cost 13 . - - i MTAMR1 TabOfCon : 8M186 112-804 . TABLE OF CONTENTS (Continued) PAGE 6 PROJECT SUMMARY . 6.1 Summary of Project 16 6.2 Site Condition After Completion 16 6.3 As-Built Drawings 17 6.4 Maintenance or Follow-up 20 7. COMMENTS/SUGGESTIONS 21 8. PHOTOGRAPHS/SLIDES 8.1 Listing 22 8.2 Photo Location Map 23 8.3 Photos/Slides 23 9 APPENDIX A . 9.1 Daily Inspection Reports 30 10 APPENDIX B . 10.1 Bid Tabulations 31 11 APPENDIX C . 11.1 Analysis of Consultants Costs 32 - i i - MTAMR1 :TabOfCon 8M186 112-804 . / \ INTRODUCTION 1. c Digitized by the Internet Archive 2014 in https://archive.org/details/hillblaineminere1991hkma . . 1.1 Site Description The Hill/Blaine Mine Reclamation Project required four abandoned coal mines sites to be reclaimed. The coal mine sites were located in shallow coulees alongside small drainages (See Figures 1 through 4). Mine sites consisted of open and collapsed adits, subsidence holes and coal slack piles. The largest mine site, the Reserve Site, was located seven miles southwest of Havre, Montana. Many collapsed adits and subsidence holes existed within two coulees that formed one main drainage. Seven coal slack piles existed, all of which were found adjacent to the drainage bottoms. Subsidence holes and collapsed adits were found above each slack pile. In many areas along the sides of the coulees, natural coal outcrops were visible. Some of these outcrops were sparsely vegetated. Two old mine buildings existed at the junction of the drainages. The drainage channel had undercut one of these buildings, leaving one corner of the building unsupported. Approximately one mile west of the Reserve Site was the Salice Roberto Mine Site. This abandoned coal mine consisted of four adits and a number of subsidence holes. This site was also within a coulee alongside a small drainage. Access to this site was via a two track farm road. The Sorenson Mine Site is located approximately eleven miles south of Chinook, Montana. A large coal slack pile existed at the base of a small hill where the adit was located. The adit had been plugged pryor to construction utilizing three to five foot diameter rocks. On the top of the hill above the adit many subsidence holes had developed. A few of these holes had been reported by the landowner to have developed in recent years. The coal slack pile was surrounded by three springs that originated around the collapsed adit. A rock building foundation existed approximately seventy-five feet west of the adit The fourth mine site was the Ehlang Site. This site is located thirteen miles north of Chinook, Montana. This site consisted of two collapsed adits, three coal slack piles and various subsidence holes. All of these features existed on the south face of a small hill. 1.2 Maps Showing Mine Locations Maps showing mine locations are shown in Figures 1 through 4 on next four pages - 1 MTAMR1 FinalRpt : 8M186 112-804 . MONTANA SITE LOCATIONS -", HAVRE 7m / _ : : ; /'<fe-" t ' ! \-^ci^f ..." s'cKe/i"" .4ml '.yic^"£'1 : RESERVE SfTE T. 31 M,R 17 E.SEC, 4 HLL COUNTY, MONTANA LOCATION MAP FIGURE --2 - MONTANA SITE LOCATIONS SAUCE ROBERTO SITE T. 31 M,R, 17 E,SEC. 5 mL COUNTY, MONTANA LOCATION MAP - 3 - FIGURE 2 SOFENSEN SITE R T. 31 N 19 E.SEC.7 and '8 n BLAINE CX}Um,MONM8^„ ^ LOCATION MAP - 4 - FIGURE i