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Acronyms and Abbreviations.. . iv
<br />Introduction............... 1-1
<br />%'% Project Background ... —.......... ...... ...................................................... ......................................................... 1-%
<br />1.2 Purpose and Objectives ........... ---,~---................................................................ ................................. 1-%
<br />1.3 Location .......... —.... ............. _—,',,,,'—.'......... ............................................................. ........................... 1-2
<br />System Design Basis ~~
<br />3.1 SwtemnType, ,--,—,.,'..,..,—.,~.,.,................ ...... .......... ---------,--............................. -........ 2'%
<br />3.3 Flow and Water Quality Design Criteria .......................... ..................... --................................................... 2-%
<br />2.3 Performance Modeling and Hesuft...................... ~.......',.,,.,.,—....... ......... ...... ......................... .......... 2-%
<br />Geotechnical Investigation ,.,..... .... .,.,,...,.............. ............. .................... ..,.,,..... ...... ......... ........ ..~..... 3-1
<br />3.1 Geo$echnhcApkeld and Laboratory Testing ...... ....... .......................................... --3'%
<br />3.2 GemterhnicoNStmh4||ty Analysis ..................................................................... —............................................. 3'3
<br />33 GeztemhnicaNRecommendations ........................................ ___ .................. —... ---',,,,.,'..,.,,,,.,.,.~,..,.3'4
<br />3-3.1 Borrow Suitability .... ...... -----------.—,................................................... ................ —,.3-4
<br />33.2 GmbankrnwmtFoundation Preparnt|pn---'............................................................................... 3-4
<br />3-3.3 Embankment L|n|ng......................... .... —............ ,__,,.,.,,',,,',,..,,,_,,,,________...... ... 3'4
<br />3.3,4 Embankment Slope ConfigunoMon...... --................ ___ ........ ._,,,,'_,',,,',,,',,.,',,__-----3'5
<br />3.3.5 Gypa�s Dh"Configu ration ................. ........... ................. -----'........................ ................. 3-5
<br />System Description ... ............................................ ,'_,_.,,,,'_,_,,_,.,_,.,~_,_,_,,,,,,~,,~~,,~~,~,_,~~~._4.1
<br />44 Configuration ................... ..................................... -............ --.--.—..................................... ................. 4-1
<br />4.2 —..~.,.--------------------.--,.,....,.,—.,.,.,..,-------------../,1
<br />43 Pipe Sizing -----'--..................................................................... —....................
<br />--,.,..,.,,..,.,',.,—./*'4
<br />4,4 Agri Drain Water Level Control Structures ............ ...... ........................... -------,................................ 4'6
<br />4.5 Spillways ............. -----................. .......................................................................... -__',,.,~_,_,,..A'7
<br />4.6 Bypass Ditch ......................... .... ____ ................................................................................................. ........ 4'8
<br />Class III Cost Estimate .................. 5'1
<br />PECertification ~__..___,,',,_,,,__,,.,,,,,_,.,,.,.,.,.,,.,,,,,.,,,~~,~~~.~~___._,�,�
<br />References .......................................
<br />Appmndimies
<br />AppendkxA......... ............. ........ CovmmpNun|Study -lwen*ymLLwCoal Mine Discharge Passive Treatment F*aluvtipn
<br />Appendix 8 ................................... ,,............................................... ...... TwentYmiAvCoal Mine Water Quality Analysis
<br />Appendix C....................................................................................................................... Final 0wnign0navNm0 Package
<br />AppendixD .... ......... ..................................... ,'................... ............................................. -----''?est Pitting Program
<br />ApMndkx2......................................... —...... ,-----............................................................. Earthvmork Specifications
<br />Appendix F ......... —........ ..................... ............... ----.................................. Geotechnical Lmbmro0mn/Test Awsuks
<br />Appendix G ...... ....... ........ ................................. Fplde|Creek 61VIN Mine Water Storage and Stormm/mnef Design Basis
<br />Appendix M ................................... ...................... ............ -----............. --,..,.,..Class III Cost Estimate Repmvt
<br />Figures
<br />F1gwe%-t:FmAded Creek TwentymUmCoal Mine L»cginn................................. ..—........................
<br />--------l�2
<br />Figure3-1. lest Pitting Locations ...... ............................. ----,................................................................................ 3-%
<br />Figure 3-2. Plasticity Chart Depicting Distribution of Atte rbergLimits fromLwbwnnwnyTnnta..................... ............ 3-3
<br />Figure 3'1 Distribution of Fines Content from Sieve Testing of3arnp|es.... ,............ ,.............................................. 3-3
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