Conti

ADDENDUM NO 1

FINAL CONSTRUCTION DOCUMENTATIONAND CERTIFICATION REPORT

Emergency Stabilization of TP-1Buttress Construction

Elizabeth Mine Superfund SiteSouth Strafford Vermont

July 2006

Contract No DACW33-01-D-0003Task Order No 0006

Prepared for

US Environmental Protection AgencyRegion 11 Congress StreetBoston MA 02114

and

US Army Corps of EngineersNew England District696 Virginia RoadConcord MA 01742

Prepared by

Conti Environment and Infrastructure IncOne Concord Farms490 Virginia RoadConcord MA 01742

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

INTRODUCTION AND PURPOSE

The Elizabeth Mine Superfund Site (the Site) is located in South Strafford Vermont (east-central Vermont) Historically copper mining operations began in the early 1800s and continued through the 1950s Existing features at the Site include buildings mine shafts air vents adits (horizontal mine entrances) waste rock piles and several mine tailing piles notably tailing pile number 1 (TP-1) Copperas Brook drains the majority of the Site runoff eventually flowing into the Ompompanoosuc River located due north of the Site

The Elizabeth Mine site has been investigated by State and Federal agencies and private companies As part of the various studies one or more samples of mine tailings surface water sediment fish tissues ground water and drinking water have been collected and analyzed for metals The results indicated the presence of metals that exceeded background levels

Conti Environment and Infrastructure Inc (Conti) has completed two distinct remedial actions at the Site in a phase approach beginning in October 2004 with final completion in September of 2005 Two separate final construction reports have been prepared and submitted by Conti to document the remedial work for each phase The addendum contained herein is associated with the Final Construction Documentation and Certification Report for the buttress construction submitted in January 2005 (Conti 2005)

PREVIOUS WORK

As part of an EPA Time-Critical Response Action (TCRA) two separate remedial actions were completed by Conti in a phased approach The first phase of the emergency stabilization included installation of a decant culvert to drain the TP-1 decant pond Conti mobilized the Site in late October of 2003 and installation of the decant culvert was completed in late December of 2003

The second phase of work included construction of an earthen buttress to stabilize the existing TP-1 tailings impoundment Buttress construction work commenced in May of 2004 and was significantly complete in December 2004 This phase included clearing and grubbing establishment of erosion controls improvement and construction of site access roads and haul roads riprap swale and diversion trench construction toe tailing removal sediment retention basin construction toe-drain installation TP-1 slope reshygrade borrow area development earthen buttress dam construction final grading and site restoration

REPAIR WORK 2005

Several items required repair including punch-list items that could not be completed in the winter of 2004 and maintenance related repairs following the winter and spring weather effects The repairs were completed in three phases with the initial phase being completed in April 2005 the second phase in June 2005 and the third phase in September of 2005 The following subsections describe the major repair items were completed Refer to the attached punch-list (Attachment 2) and the action item list (Attachment 3) for additional work items completed during the 2005 season

Conti

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

Toe Drain Pipe

Seepage within the vicinity of the toe drain outlet pipe located immediately east of the starter dam was evident in the spring of 2005 Upon investigation it was evident that the pipe section was not slotted consistent with the intent of the original design The corrective action included excavation of the pipe outlet and field perforating a section approximately 20 to 30 feet long by hand The pipe section was backfilled pursuant with the original design and the disturbed surface was restored using topsoil and hydroseeding using approved site seed and mulch mix

Buttress Slope

In the spring of 2005 an area of the buttress (approximately four-acres) in the vicinity of the starter dam (center of buttress) had little vegetation and some significant erosion rills that developed at the upper crest bench and migrated down-slope beneath the erosion control matting (ECM) Much of the matting had become clogged with eroded silt and appeared to be inhibiting vegetative growth The ECM was cut in sections 20-30 feet and rolled to create erosion logs and the logs were benched into the topsoil The matting that was severely clogged with silt rotted or otherwise non-reuseable was to be pulled off slope with a skidsteer and neatly staged along the edge of access road for future disposal

The east bench had been rutted during buttress construction and equipment access in the saturated winter conditions and water was pooling on the bench To enhance flow from the bench into the riprap downcomer Conti removed the turf reinforcement mat (TRM) and re-graded the crest to remove high spots just west of the downcomer The disturbed area was re-seeded and the TRM was replaced

Following the spring growing season it became evident that there were several sections of the buttress where the quality of the borrowed topsoil was noticeably poor and would not sustain vegetative growth All of the topsoil placed on the buttress face had been borrowed from the site including the east buttress borrow pit and the lower toe of TP-1 These areas were covered with approximately four inches of imported topsoil which consisted of a blend of composted cow manure and loam A total of approximately 1500 cubic yards of topsoil was imported and placed over an area of 2 to 3 acres The areas were graded hydroseeded using the approved hydromulch and restoration seed mix The rolled erosion mat logs were replaced and benched into the topsoil to help mitigate any rills from propagating downslope

Borrow Area

Several rills had developed along the Jeep Road embankment at the eastern limit of the borrow area as a result of concentrated flows coming from the access road Where accessible (ie dry conditions) buckets of stone were used to fill and stabilize the eroded bank of the Jeep Road embankment

Conti

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

Several erosion rills developed within the borrow area where flows had concentrated from east to west (toward the spillway) Little vegetation had been established as a result of the flows and erosion of grass seed These rills were graded out filled and additional grass seed was placed A major channel had developed as a result of the flow discharging from the existing 24-inch culvert located at the northeast corner of the landfill (beneath the Jeep Road embankment)

At the time of repairs there was a consistent flow coming out of the culvert Therefore a low-flow channel was graded in a meandering or natural alignment leading from the outlet northwestward to the spillway The channel was seeded using a conservation type seed mix and erosion matting was used for channelbank protection and erosion logs were placed to act as check-dams The area located in the vicinity of the culvert outlet had become eroded during high volume flows to help protect the area from additional soils erosion stones were placed as a stabilization outlet pad

Erosion had also occurred at the southwest end of the borrow area where the low-flow channel meets the spillway To stabilize this area three-inch stone was used to fill the eroded bank of the swale running parallel with the spillway where it bends to flow into the spillway The adjacent disturbed areas were then hand-seeded

Decant Spillway

A section of the decant spillway measuring approximately 100-fet long by 6-feet wide had some bare areas resulting from flooding and erosion of seed mix This area was hand-raked to remove any surface irregularities and to prepare the soils to receive additional seed The area was then over-seeded by hand using the approved seed mix for the site

ATTACHMENTS

The following attachments are presented in this addendum

1 Project Schedule for the Spring 2005 Buttress Repairs 2 Project Punch-List for the Spring 2005 Repairs 3 Project Action List for the September Repairs 4 Project Photographs

Conti

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

PROJECT CONTACTS

Name Agency Contact Information Scott Acone PE USACE 696 Virginia Road Concord MA 01742

(978) 318-8162 Scott EAconenae02 usacearmymil

Conrad Menard USACE 696 Virginia Road Concord MA 01742 ConradJMenardnae02usacearmymil

Tim Nichols PE Conti 490 Virginia Road Concord MA 01742 (978) 318-9095 tnicholsconticorpcom

Conti

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

INTRODUCTION AND PURPOSE

The Elizabeth Mine Superfund Site (the Site) is located in South Strafford Vermont (east-central Vermont) Historically copper mining operations began in the early 1800s and continued through the 1950s Existing features at the Site include buildings mine shafts air vents adits (horizontal mine entrances) waste rock piles and several mine tailing piles notably tailing pile number 1 (TP-1) Copperas Brook drains the majority of the Site runoff eventually flowing into the Ompompanoosuc River located due north of the Site

The Elizabeth Mine site has been investigated by State and Federal agencies and private companies As part of the various studies one or more samples of mine tailings surface water sediment fish tissues ground water and drinking water have been collected and analyzed for metals The results indicated the presence of metals that exceeded background levels

Conti Environment and Infrastructure Inc (Conti) has completed two distinct remedial actions at the Site in a phase approach beginning in October 2004 with final completion in September of 2005 Two separate final construction reports have been prepared and submitted by Conti to document the remedial work for each phase The addendum contained herein is associated with the Final Construction Documentation and Certification Report for the buttress construction submitted in January 2005 (Conti 2005)

PREVIOUS WORK

As part of an EPA Time-Critical Response Action (TCRA) two separate remedial actions were completed by Conti in a phased approach The first phase of the emergency stabilization included installation of a decant culvert to drain the TP-1 decant pond Conti mobilized the Site in late October of 2003 and installation of the decant culvert was completed in late December of 2003

The second phase of work included construction of an earthen buttress to stabilize the existing TP-1 tailings impoundment Buttress construction work commenced in May of 2004 and was significantly complete in December 2004 This phase included clearing and grubbing establishment of erosion controls improvement and construction of site access roads and haul roads riprap swale and diversion trench construction toe tailing removal sediment retention basin construction toe-drain installation TP-1 slope reshygrade borrow area development earthen buttress dam construction final grading and site restoration

REPAIR WORK 2005

Several items required repair including punch-list items that could not be completed in the winter of 2004 and maintenance related repairs following the winter and spring weather effects The repairs were completed in three phases with the initial phase being completed in April 2005 the second phase in June 2005 and the third phase in September of 2005 The following subsections describe the major repair items were completed Refer to the attached punch-list (Attachment 2) and the action item list (Attachment 3) for additional work items completed during the 2005 season

Conti

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

Toe Drain Pipe

Seepage within the vicinity of the toe drain outlet pipe located immediately east of the starter dam was evident in the spring of 2005 Upon investigation it was evident that the pipe section was not slotted consistent with the intent of the original design The corrective action included excavation of the pipe outlet and field perforating a section approximately 20 to 30 feet long by hand The pipe section was backfilled pursuant with the original design and the disturbed surface was restored using topsoil and hydroseeding using approved site seed and mulch mix

Buttress Slope

In the spring of 2005 an area of the buttress (approximately four-acres) in the vicinity of the starter dam (center of buttress) had little vegetation and some significant erosion rills that developed at the upper crest bench and migrated down-slope beneath the erosion control matting (ECM) Much of the matting had become clogged with eroded silt and appeared to be inhibiting vegetative growth The ECM was cut in sections 20-30 feet and rolled to create erosion logs and the logs were benched into the topsoil The matting that was severely clogged with silt rotted or otherwise non-reuseable was to be pulled off slope with a skidsteer and neatly staged along the edge of access road for future disposal

The east bench had been rutted during buttress construction and equipment access in the saturated winter conditions and water was pooling on the bench To enhance flow from the bench into the riprap downcomer Conti removed the turf reinforcement mat (TRM) and re-graded the crest to remove high spots just west of the downcomer The disturbed area was re-seeded and the TRM was replaced

Following the spring growing season it became evident that there were several sections of the buttress where the quality of the borrowed topsoil was noticeably poor and would not sustain vegetative growth All of the topsoil placed on the buttress face had been borrowed from the site including the east buttress borrow pit and the lower toe of TP-1 These areas were covered with approximately four inches of imported topsoil which consisted of a blend of composted cow manure and loam A total of approximately 1500 cubic yards of topsoil was imported and placed over an area of 2 to 3 acres The areas were graded hydroseeded using the approved hydromulch and restoration seed mix The rolled erosion mat logs were replaced and benched into the topsoil to help mitigate any rills from propagating downslope

Borrow Area

Several rills had developed along the Jeep Road embankment at the eastern limit of the borrow area as a result of concentrated flows coming from the access road Where accessible (ie dry conditions) buckets of stone were used to fill and stabilize the eroded bank of the Jeep Road embankment

Conti

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

Several erosion rills developed within the borrow area where flows had concentrated from east to west (toward the spillway) Little vegetation had been established as a result of the flows and erosion of grass seed These rills were graded out filled and additional grass seed was placed A major channel had developed as a result of the flow discharging from the existing 24-inch culvert located at the northeast corner of the landfill (beneath the Jeep Road embankment)

At the time of repairs there was a consistent flow coming out of the culvert Therefore a low-flow channel was graded in a meandering or natural alignment leading from the outlet northwestward to the spillway The channel was seeded using a conservation type seed mix and erosion matting was used for channelbank protection and erosion logs were placed to act as check-dams The area located in the vicinity of the culvert outlet had become eroded during high volume flows to help protect the area from additional soils erosion stones were placed as a stabilization outlet pad

Erosion had also occurred at the southwest end of the borrow area where the low-flow channel meets the spillway To stabilize this area three-inch stone was used to fill the eroded bank of the swale running parallel with the spillway where it bends to flow into the spillway The adjacent disturbed areas were then hand-seeded

Decant Spillway

A section of the decant spillway measuring approximately 100-fet long by 6-feet wide had some bare areas resulting from flooding and erosion of seed mix This area was hand-raked to remove any surface irregularities and to prepare the soils to receive additional seed The area was then over-seeded by hand using the approved seed mix for the site

ATTACHMENTS

The following attachments are presented in this addendum

1 Project Schedule for the Spring 2005 Buttress Repairs 2 Project Punch-List for the Spring 2005 Repairs 3 Project Action List for the September Repairs 4 Project Photographs

Conti

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

PROJECT CONTACTS

Name Agency Contact Information Scott Acone PE USACE 696 Virginia Road Concord MA 01742

(978) 318-8162 Scott EAconenae02 usacearmymil

Conrad Menard USACE 696 Virginia Road Concord MA 01742 ConradJMenardnae02usacearmymil

Tim Nichols PE Conti 490 Virginia Road Concord MA 01742 (978) 318-9095 tnicholsconticorpcom

Conti

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

Toe Drain Pipe

Seepage within the vicinity of the toe drain outlet pipe located immediately east of the starter dam was evident in the spring of 2005 Upon investigation it was evident that the pipe section was not slotted consistent with the intent of the original design The corrective action included excavation of the pipe outlet and field perforating a section approximately 20 to 30 feet long by hand The pipe section was backfilled pursuant with the original design and the disturbed surface was restored using topsoil and hydroseeding using approved site seed and mulch mix

Buttress Slope

In the spring of 2005 an area of the buttress (approximately four-acres) in the vicinity of the starter dam (center of buttress) had little vegetation and some significant erosion rills that developed at the upper crest bench and migrated down-slope beneath the erosion control matting (ECM) Much of the matting had become clogged with eroded silt and appeared to be inhibiting vegetative growth The ECM was cut in sections 20-30 feet and rolled to create erosion logs and the logs were benched into the topsoil The matting that was severely clogged with silt rotted or otherwise non-reuseable was to be pulled off slope with a skidsteer and neatly staged along the edge of access road for future disposal

The east bench had been rutted during buttress construction and equipment access in the saturated winter conditions and water was pooling on the bench To enhance flow from the bench into the riprap downcomer Conti removed the turf reinforcement mat (TRM) and re-graded the crest to remove high spots just west of the downcomer The disturbed area was re-seeded and the TRM was replaced

Following the spring growing season it became evident that there were several sections of the buttress where the quality of the borrowed topsoil was noticeably poor and would not sustain vegetative growth All of the topsoil placed on the buttress face had been borrowed from the site including the east buttress borrow pit and the lower toe of TP-1 These areas were covered with approximately four inches of imported topsoil which consisted of a blend of composted cow manure and loam A total of approximately 1500 cubic yards of topsoil was imported and placed over an area of 2 to 3 acres The areas were graded hydroseeded using the approved hydromulch and restoration seed mix The rolled erosion mat logs were replaced and benched into the topsoil to help mitigate any rills from propagating downslope

Borrow Area

Several rills had developed along the Jeep Road embankment at the eastern limit of the borrow area as a result of concentrated flows coming from the access road Where accessible (ie dry conditions) buckets of stone were used to fill and stabilize the eroded bank of the Jeep Road embankment

Conti

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

Several erosion rills developed within the borrow area where flows had concentrated from east to west (toward the spillway) Little vegetation had been established as a result of the flows and erosion of grass seed These rills were graded out filled and additional grass seed was placed A major channel had developed as a result of the flow discharging from the existing 24-inch culvert located at the northeast corner of the landfill (beneath the Jeep Road embankment)

At the time of repairs there was a consistent flow coming out of the culvert Therefore a low-flow channel was graded in a meandering or natural alignment leading from the outlet northwestward to the spillway The channel was seeded using a conservation type seed mix and erosion matting was used for channelbank protection and erosion logs were placed to act as check-dams The area located in the vicinity of the culvert outlet had become eroded during high volume flows to help protect the area from additional soils erosion stones were placed as a stabilization outlet pad

Erosion had also occurred at the southwest end of the borrow area where the low-flow channel meets the spillway To stabilize this area three-inch stone was used to fill the eroded bank of the swale running parallel with the spillway where it bends to flow into the spillway The adjacent disturbed areas were then hand-seeded

Decant Spillway

A section of the decant spillway measuring approximately 100-fet long by 6-feet wide had some bare areas resulting from flooding and erosion of seed mix This area was hand-raked to remove any surface irregularities and to prepare the soils to receive additional seed The area was then over-seeded by hand using the approved seed mix for the site

ATTACHMENTS

The following attachments are presented in this addendum

1 Project Schedule for the Spring 2005 Buttress Repairs 2 Project Punch-List for the Spring 2005 Repairs 3 Project Action List for the September Repairs 4 Project Photographs

Conti

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

PROJECT CONTACTS

Name Agency Contact Information Scott Acone PE USACE 696 Virginia Road Concord MA 01742

(978) 318-8162 Scott EAconenae02 usacearmymil

Conrad Menard USACE 696 Virginia Road Concord MA 01742 ConradJMenardnae02usacearmymil

Tim Nichols PE Conti 490 Virginia Road Concord MA 01742 (978) 318-9095 tnicholsconticorpcom

Conti

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

Several erosion rills developed within the borrow area where flows had concentrated from east to west (toward the spillway) Little vegetation had been established as a result of the flows and erosion of grass seed These rills were graded out filled and additional grass seed was placed A major channel had developed as a result of the flow discharging from the existing 24-inch culvert located at the northeast corner of the landfill (beneath the Jeep Road embankment)

At the time of repairs there was a consistent flow coming out of the culvert Therefore a low-flow channel was graded in a meandering or natural alignment leading from the outlet northwestward to the spillway The channel was seeded using a conservation type seed mix and erosion matting was used for channelbank protection and erosion logs were placed to act as check-dams The area located in the vicinity of the culvert outlet had become eroded during high volume flows to help protect the area from additional soils erosion stones were placed as a stabilization outlet pad

Erosion had also occurred at the southwest end of the borrow area where the low-flow channel meets the spillway To stabilize this area three-inch stone was used to fill the eroded bank of the swale running parallel with the spillway where it bends to flow into the spillway The adjacent disturbed areas were then hand-seeded

Decant Spillway

A section of the decant spillway measuring approximately 100-fet long by 6-feet wide had some bare areas resulting from flooding and erosion of seed mix This area was hand-raked to remove any surface irregularities and to prepare the soils to receive additional seed The area was then over-seeded by hand using the approved seed mix for the site

ATTACHMENTS

The following attachments are presented in this addendum

1 Project Schedule for the Spring 2005 Buttress Repairs 2 Project Punch-List for the Spring 2005 Repairs 3 Project Action List for the September Repairs 4 Project Photographs

Conti

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

PROJECT CONTACTS

Name Agency Contact Information Scott Acone PE USACE 696 Virginia Road Concord MA 01742

(978) 318-8162 Scott EAconenae02 usacearmymil

Conrad Menard USACE 696 Virginia Road Concord MA 01742 ConradJMenardnae02usacearmymil

Tim Nichols PE Conti 490 Virginia Road Concord MA 01742 (978) 318-9095 tnicholsconticorpcom

Conti

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

PROJECT CONTACTS

Name Agency Contact Information Scott Acone PE USACE 696 Virginia Road Concord MA 01742

(978) 318-8162 Scott EAconenae02 usacearmymil

Conrad Menard USACE 696 Virginia Road Concord MA 01742 ConradJMenardnae02usacearmymil

Tim Nichols PE Conti 490 Virginia Road Concord MA 01742 (978) 318-9095 tnicholsconticorpcom

Conti

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

ATTACHMENT 1

PROJECT SCHEDULE 2005 SPRING REPAIRS

Conti

2005 Activity Activity Early RESP MAR APR MAY JUN JUL AUG SEP OCT

ID Description Finish 14 21 28 4 11 18 25 2 9 16 23 30 6 13 20 27 4 11 18 25 1 8 15 22 29 5 12 19 26

Contracts amp Procurement

1000 Finalize Buttress Re-Design 04APR05 URS Finalize Buttress Re-Design

1005 Scope Meeting 06APR05 06APR05 JOINT fScope lyieeting

1010 Prepare RFP 08APR05 12APR05 USACE TPrep are RFP

1020 Prepare Cost Estimate - USACE 13APR05 15APR05 USACE fPrepare Cost Estimate - USACE

1030 Prepare Cost Estimate - Conti 13APR05 15APR05 CONTI fPrepare Cost Estimate - Conti

1040 Negotiate Cost Estimate 18APR05 20APR05 JOINT Negotiate Cost Estimate

1050 Issue NTP 21APR05 21APR05 USACE f Issue NTP

1060 Procure Equipment 10 10 22APR05 05MAY05 CONTI ^Procure Equipment

1070 Procure Materials 10 10 22APR05 05MAY05 CONTI fProcure Materials

1075 Procure Compost 10 10 22APR05 05MAY05 CONTI ^Procure Cofnpost

1100 Procure Stump-Grinder 22APR05 02MAY05 CONTI VProcure Stump-Grinder

1080 Procure Hydroseeder 22APR05 25APR05 CONTI 7Pr gtcure Hydroseeder

1090 Procure Surveyor 22APR05 25APR05 CONTI bullProcure Surveyor

Workplans amp Submittals

2000 Work Plan Addendum 22APR05 26APR05 CONTI Work Plan Addendum

2010 SSHP Addendum 22APR05 26APR05 CONTI SSHP Addendum

2020 Misc Matls Submittals 10 10 22APR05 05MAY05 CONTI bullMisc Matls Submittals

2030 Final Site Survey Dwgs 28JUL05 01AUG05 CONTI Final Site Survey Dwgs^

2040 Construction Report Addendum 02AUG05 08AUG05 CONTI Construction Report Addendum

Remedial Implementation General Site

3000 Mobilize Personnel 16MAY05 20MAY05 CONTI Mobilize Personnel

3010 Mobilize Equipment 16MAY05 20MAY05 CONTI obilize Equipment

3020 Site Setup 23MAY05 25MAY05 CONTI 7site Setup

3030 Stockpile Stone Materials 15 15 26MAY05 15JUN05 CONTI Stockpile Stone Materials

3035 ScreenGrind Stump-Pile 26MAY05 01JUN05 CSUB ScreenGrind Stump-Pile

3032 Stockpile CompostTopsoil 15 15 26MAY05 15JUN05 CONTI VStockpile CompostTopsoil

Buttress Stabilization 3040 FillGrade Buttress Crest 02JUN05 06JUN05 CONTI FillGrade Buttress Crest

1 i

3050 Repair Erosion Rills at Toe 07JUN05 09JUN05 CONTI ^Repair Erosion Rills at Toe 3060 Re-Grade Upslope Rills 10JUN05 14JUN05 CONTI fRe-Grade Upslope Rills 3070 PlaceGrade Compost Buttress 15JUN05 21JUN05 CONTI f PlaceGrade Compost Buttress 3080 Bench Erosion Logs 25 22JUN05 28JUN05 CONTI ftaench Erosion L(jgs 25 3090 Hand-Seed Slope w Rye 29JUN05 30JUN05 CONTI Hand-Seed Slope w Rye

3100 HydroseedBFM Buttress 01JUL05 04JUL05 CSUB ^HydroseedBFM Buttress

Start Date =inish Date Data Date

14MAR05 15SEP05 04APR05

Early Bar

Float Bar Conti Environment amp Infrastructure Date

23MAR05

Revision Summary Revision

DRAFT Schedule Rev 00 Checked

TN Approved

TN

Run Date 23MAR05 1033 Progress Bar

Critical Activity

Elizabeth Mine Buttress Repairs 2005

) Primavera Systems Inc

ActivityID

Activity Description

Orig Dur

Rem Dur

Early Start

Early Finish

RESP

14 21 28 MAR

4APR

11 18 25 2MAY

9 16 23 30 6

2005 JUN

13 20 27 4JUL

11 18 25 1AUG

8 15 22 29 5SEP OCT

12 19 26 3 10 3170 Final Survey Buttress 1 1 0 05JUL05 05JUL05 CSUB VFinal Survey Buttress

Borrow Area Repairs 3110 RepairFill Erosion Rills 01JUL05 05JUL05 CONTI RepairFill Erosion Rills

3120 Construct Upper Sediment Basin 06JUL05 07JUL05 CONTI Construct Upper Sediment Basin

3130 Re-Grade Borrow Area 08JUL05 11JUL05 CONTI Re-Grade Borrow Area

3135 Place TopsoilCompost 12JUL05 14JUL05 CONTI Place TopsoilCompost

3140 Install Erosion Logs 15JUL05 15JUL05 CONTI Install Erosion Logs

3150 Hand-Place Rye Seed 18JUL05 18JUL05 CONTI JHandiPlace Rye Seed

3160 Hydroseed Area 19JUL05 19JUL05 CSUB Hydroseed Area

3180 Final Survey Borrow Area 20JUL05 20JUL05 CSUB Final Survey Bo row Area

Project Close-Out General Site

4000 Demobilize Equipment 15JUL05 19JUL05 CONTI J^Demobilize Equipment

4010 Demobilize Personnel 19JUL05 21JUL05 CONTI 7 Demobilize Personnel

4020 InvoicePayment Reconciliation 30 30 22JUL05 01SEP05 CONTI InvoicePayment Reconciliation^

4030 Final Billing amp Reporting 10 10 02SEP05 15SEP05 CONTI Final Billing amp Repor t ing^ IZIV

4040 Final Close-Out 15SEP05 CONTI Final Close-Out^

Start Date 14MAR05 Revision Summary m Early Bar Finish Date 15SEP05 Date Revision Checked Approved

- ^ 7 Float Bar TN

A= ^ f Progress Bar Data Date 04APR05 Conti Environment amp Infrastructure 23MAR05 DRAFT Schedule Rev 00 TN

Run Date 23MAR05 1033 ^m Critical Activity

Elizabeth Mine Buttress Repairs 2005

) Primavera Systems Inc

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

ATTACHMENT 2

PROJECT PUNCH-LIST 2005 SPRING REPAIRS

Conti

Conti Environment amp Infrastructure Inc Confi

Final Punch-List

Project Name ES TP-1 Elizabeth Mine Superfund Site Project No 0308001 Buttress Construction

Contract No DACW-33-0001-0003 CTO 0006 Date 62305 DFW Buttress Construction Project Completion

No Item

Not

ed B

y

Act

ion

By

Sta

tus

Cod

e Status Action (include dates)

1 Topsoil and seed neighbors front yard where trucks ran off the road

NM

2 Seed borrow area and upper TP-1 with Perennial seed mixture

NM

3 Evaluate stone-lining the western perimeter swale

JS

4 Remove 8 culvert in eastern swale on west side

JS

5

6

7

Evaluate realignment of eastern swale on west side of access road to divert flow into swale leading to upper sediment basin Grade out Northern slope of stone lined channel leading to upper sed basin (west side) to promote flow into the channel Re-grade and re-seed buttress toe area on east side and evaluate whether grass lined channels or stone swales are needed to prevent further erosion

JS

NM

NM

8 Clean out upper and lower sediment basins

NM

9 Monitor crest and re-gradereshyvegetate as necessary

NM

10 Repair erosion rills on buttress face in vicinity of starter dam and stabilize

NM

Conti

Conti

Conti

Conti

Conti USACE

Conti

Conti

Conti

Conti

Conti

C Initial repairs made in fall 2004 Lawn was inspected 62305 and no indications of damageruts

C Borrow area was over-seeded with perennial mix in April 2005 Additional seed placed in June in borrow area and at new topsoil area adjacent to the decant inlet Completed 61605

C Swale was inspected 61305 and based performance to date no additional stone is required

C Completed 61505 Pipe was removed and checkdiversion stone dam constructed

C Completed 62205 Pipe removed (see item 4) and the upper basin swale inlet elevation was lowered to divert flow to upper basin

C Completed 62305 Area was re-graded topsoil placed and seeded with perennial grass

C Completed 62105 Limited stabilization work completed in April 2005 including over-seed and repair of erosion at toe drain headwall Additional work completed in June includes topsoil in minor rills and hand-seed

C Completed 62305 Basins cleaned in February 2005 Re-clean upper basin in Spring 2005leaned again on 62305 Future maintenancecleaning of the basins is required

C Raked dead grass off slope and handseeded on 6905 Some areas to be hydroseeded with buttress

C Complete 62705 Regrade slope using existing material place 4-6 topsoilcompost blend erosion logs and hydroseed with Conex 3000 hydromulch and acid resistent seed Hydroseed to be completed on 62705

Punch-List Page 1of2

Confi Conti Environment amp Infrastructure Inc

11 Re-grade and stabilize buttress TN Conti C Regrade bench to 1-2 laterally and benchcrest from ~Station 5+50 to longitudinally (similar to east bench) downchute to reduce drainage down Place 4-6topsoil seed and install TRM buttress face and promote drainage similar to east side Protect downchute into central downchute inletjunction Completed on 62705

12 Remove erosion logs from re-grade NM Conti C Recommended leaving logs in place for slope erosion protection 62105

13 Clean inlet riser in lower sediment SA Conti C Completed on 62305 basin

14 Remove sediment from toe drain SA Conti C Completed on 62305 outlets at starter dam to prevent restriction of flow

15 Divert flow from 12 RCP at Jeep TN Conti C Swale constructed in April 2005 Swale is Rdborrow area into stabilized swale grass lined and adjacent rills filled with

peastone and covered with topsoil and seeded Completed on 61305

16 Repair toe drain outlet immediately SA Conti C Similar retrofication as east side toe drain east of starter dam - excavate outlet in 2004 Restore the oxygen low-perm pipe 20-30 feet and field-perforate barrier Completed on 61505 SDR pipe Backfill pipe in accordance with the design detail

17 Stabilize upper TP-1 crest from TN Conti C Place additional topsoilcompost and downchute location eastward hydromulchseed crest Re-grade crest to

minimize concentration of flows onto buttress regrade

18 Place topsoil and seed unvegetated SA Conti C Completed on 62305 area on top of TP1 adjacent to decant pond inlet

19 Install a stone lined swale in south SA Conti C Completed on 62205 end of borrow pit connecting to spillway where significant erosion is evident

20

21

Status Codes N = New Item O = Open Item C = Closed Completed Item

CQO Date

CQCSM Date

Punch-List Page 2 of 2

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

ATTACHMENT 3

PROJECT ACTION LIST SEPTEMBER 2005 REPAIRS

Conti

Elizabeth Mine 2005 Repairs - Phase II

02 August 2005

Buttress Repair Items No Description of Repair Item Description of Repair Mob 1 Light vegetation along west section 1 Remove ECM 1

of buttress face and bench Topsoil 2 Cutgrade high spot along 2 loose and organic newly graded section west of 2

downcomer 3 Hydroseed w mine mix 4 Installbench rolled mat logs

2 Two sections of buttress with little 1 Remove ECM 1 vegetation east and west edge of 2 Track surface to loosen soils 2 repair section Topsoil mineral 3 Place 2-4 of organic soil 2 based and compact 4 Track-in organic soil 2

5 Installbench rolled mat logs 6 Hydroseed w mine mix

3 Eroded section along west 1 Place 2-4 organic soil 2 embankment of starter dam and little 2 Hydroseed w mine mix vegetation 3 Installbench rolled mat logs

4 2 Rills at east embankment of starter 1 Fill major rills with 2 stone 2 dam 2 Fill minor rills with topsoil

and hand-seed 5 Area upslope of starter dam lightly 1 Place 2-4 organic soil and 2

vegetated Soil compact and low hydroseed w mine mix organic value 2 Installbench rolled mat logs

6 Light vegetation along east section 1 Remove ECM 1 of buttress face and bench Topsoil 2 Track bench to loosen soils 2 loose and organic 3 Hydroseed w mine mix 2

4 Installbench rolled mat logs Analyze existing topsoil to be re-hydroseeded and add amendments to hydromulch mix

(lime and fertilizer)

Borrow Area No Description of Repair Item 1 Minor rills and saturated soils along

east embankment toe (along jeep road)

2 Lightly vegetated areas

3 Stone channel at southwest corner of borrow area w minor rills and bank erosion

4 Light vegetation and sediment deposits in spillway (from borrow area erosion)

Description of Repair Mob 1 Construct a stone-lined (3) 2

channel (~4w x 2d) along edge of toe draining south to corner then west to connect with spillway stone transition

2 Re-gradeshim jeep road at southeast corner of borrow area to divert run-on

1 Fill low areas w organic soil 2 from channel excavation

2 Hydroseed entire borrow area using typical conservationslope mix

1 Fillgrade out minor rills 2 2 Hydroseed with repair No 3 3 Repair eroded bank with

additional 3 stone 1 Hand rake unvegetated areas 1 2 Hand-seed areas

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

ATTACHMENT 4

PROJECT PHOTOGRAPHS

Conti

_ _ _

- - bull bull -

Jeep Road Culvert at Borrow Area April 2005 I

Low-Flow Channel at Borrow Area April 2005

Field Perforation of the Toe-Drain Pipe June 2005

Restoring the Toe-Drain Pipe Area June 2005

Re-Grading of the West Buttress Crest June 2005

Placement of Additional Topsoil on Buttress September 2005

Placement of Additional Topsoil on Buttress September 2005

Hydroseeding of Buttress September 2005

RestoredVegetated Borrow Area September 2005

- lt (o

1. barcode 251692
2. barcodetext SEMS Doc ID 251692

2005 Activity Activity Early RESP MAR APR MAY JUN JUL AUG SEP OCT

ID Description Finish 14 21 28 4 11 18 25 2 9 16 23 30 6 13 20 27 4 11 18 25 1 8 15 22 29 5 12 19 26

Contracts amp Procurement

1000 Finalize Buttress Re-Design 04APR05 URS Finalize Buttress Re-Design

1005 Scope Meeting 06APR05 06APR05 JOINT fScope lyieeting

1010 Prepare RFP 08APR05 12APR05 USACE TPrep are RFP

1020 Prepare Cost Estimate - USACE 13APR05 15APR05 USACE fPrepare Cost Estimate - USACE

1030 Prepare Cost Estimate - Conti 13APR05 15APR05 CONTI fPrepare Cost Estimate - Conti

1040 Negotiate Cost Estimate 18APR05 20APR05 JOINT Negotiate Cost Estimate

1050 Issue NTP 21APR05 21APR05 USACE f Issue NTP

1060 Procure Equipment 10 10 22APR05 05MAY05 CONTI ^Procure Equipment

1070 Procure Materials 10 10 22APR05 05MAY05 CONTI fProcure Materials

1075 Procure Compost 10 10 22APR05 05MAY05 CONTI ^Procure Cofnpost

1100 Procure Stump-Grinder 22APR05 02MAY05 CONTI VProcure Stump-Grinder

1080 Procure Hydroseeder 22APR05 25APR05 CONTI 7Pr gtcure Hydroseeder

1090 Procure Surveyor 22APR05 25APR05 CONTI bullProcure Surveyor

Workplans amp Submittals

2000 Work Plan Addendum 22APR05 26APR05 CONTI Work Plan Addendum

2010 SSHP Addendum 22APR05 26APR05 CONTI SSHP Addendum

2020 Misc Matls Submittals 10 10 22APR05 05MAY05 CONTI bullMisc Matls Submittals

2030 Final Site Survey Dwgs 28JUL05 01AUG05 CONTI Final Site Survey Dwgs^

2040 Construction Report Addendum 02AUG05 08AUG05 CONTI Construction Report Addendum

Remedial Implementation General Site

3000 Mobilize Personnel 16MAY05 20MAY05 CONTI Mobilize Personnel

3010 Mobilize Equipment 16MAY05 20MAY05 CONTI obilize Equipment

3020 Site Setup 23MAY05 25MAY05 CONTI 7site Setup

3030 Stockpile Stone Materials 15 15 26MAY05 15JUN05 CONTI Stockpile Stone Materials

3035 ScreenGrind Stump-Pile 26MAY05 01JUN05 CSUB ScreenGrind Stump-Pile

3032 Stockpile CompostTopsoil 15 15 26MAY05 15JUN05 CONTI VStockpile CompostTopsoil

Buttress Stabilization 3040 FillGrade Buttress Crest 02JUN05 06JUN05 CONTI FillGrade Buttress Crest

1 i

3050 Repair Erosion Rills at Toe 07JUN05 09JUN05 CONTI ^Repair Erosion Rills at Toe 3060 Re-Grade Upslope Rills 10JUN05 14JUN05 CONTI fRe-Grade Upslope Rills 3070 PlaceGrade Compost Buttress 15JUN05 21JUN05 CONTI f PlaceGrade Compost Buttress 3080 Bench Erosion Logs 25 22JUN05 28JUN05 CONTI ftaench Erosion L(jgs 25 3090 Hand-Seed Slope w Rye 29JUN05 30JUN05 CONTI Hand-Seed Slope w Rye

3100 HydroseedBFM Buttress 01JUL05 04JUL05 CSUB ^HydroseedBFM Buttress

Start Date =inish Date Data Date

14MAR05 15SEP05 04APR05

Early Bar

Float Bar Conti Environment amp Infrastructure Date

23MAR05

Revision Summary Revision

DRAFT Schedule Rev 00 Checked

TN Approved

TN

Run Date 23MAR05 1033 Progress Bar

Critical Activity

Elizabeth Mine Buttress Repairs 2005

) Primavera Systems Inc

ActivityID

Activity Description

Orig Dur

Rem Dur

Early Start

Early Finish

RESP

14 21 28 MAR

4APR

11 18 25 2MAY

9 16 23 30 6

2005 JUN

13 20 27 4JUL

11 18 25 1AUG

8 15 22 29 5SEP OCT

12 19 26 3 10 3170 Final Survey Buttress 1 1 0 05JUL05 05JUL05 CSUB VFinal Survey Buttress

Borrow Area Repairs 3110 RepairFill Erosion Rills 01JUL05 05JUL05 CONTI RepairFill Erosion Rills

3120 Construct Upper Sediment Basin 06JUL05 07JUL05 CONTI Construct Upper Sediment Basin

3130 Re-Grade Borrow Area 08JUL05 11JUL05 CONTI Re-Grade Borrow Area

3135 Place TopsoilCompost 12JUL05 14JUL05 CONTI Place TopsoilCompost

3140 Install Erosion Logs 15JUL05 15JUL05 CONTI Install Erosion Logs

3150 Hand-Place Rye Seed 18JUL05 18JUL05 CONTI JHandiPlace Rye Seed

3160 Hydroseed Area 19JUL05 19JUL05 CSUB Hydroseed Area

3180 Final Survey Borrow Area 20JUL05 20JUL05 CSUB Final Survey Bo row Area

Project Close-Out General Site

4000 Demobilize Equipment 15JUL05 19JUL05 CONTI J^Demobilize Equipment

4010 Demobilize Personnel 19JUL05 21JUL05 CONTI 7 Demobilize Personnel

4020 InvoicePayment Reconciliation 30 30 22JUL05 01SEP05 CONTI InvoicePayment Reconciliation^

4030 Final Billing amp Reporting 10 10 02SEP05 15SEP05 CONTI Final Billing amp Repor t ing^ IZIV

4040 Final Close-Out 15SEP05 CONTI Final Close-Out^

Start Date 14MAR05 Revision Summary m Early Bar Finish Date 15SEP05 Date Revision Checked Approved

- ^ 7 Float Bar TN

A= ^ f Progress Bar Data Date 04APR05 Conti Environment amp Infrastructure 23MAR05 DRAFT Schedule Rev 00 TN

Run Date 23MAR05 1033 ^m Critical Activity

Elizabeth Mine Buttress Repairs 2005

) Primavera Systems Inc

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

ATTACHMENT 2

PROJECT PUNCH-LIST 2005 SPRING REPAIRS

Conti

Conti Environment amp Infrastructure Inc Confi

Final Punch-List

Project Name ES TP-1 Elizabeth Mine Superfund Site Project No 0308001 Buttress Construction

Contract No DACW-33-0001-0003 CTO 0006 Date 62305 DFW Buttress Construction Project Completion

No Item

Not

ed B

y

Act

ion

By

Sta

tus

Cod

e Status Action (include dates)

1 Topsoil and seed neighbors front yard where trucks ran off the road

NM

2 Seed borrow area and upper TP-1 with Perennial seed mixture

NM

3 Evaluate stone-lining the western perimeter swale

JS

4 Remove 8 culvert in eastern swale on west side

JS

5

6

7

Evaluate realignment of eastern swale on west side of access road to divert flow into swale leading to upper sediment basin Grade out Northern slope of stone lined channel leading to upper sed basin (west side) to promote flow into the channel Re-grade and re-seed buttress toe area on east side and evaluate whether grass lined channels or stone swales are needed to prevent further erosion

JS

NM

NM

8 Clean out upper and lower sediment basins

NM

9 Monitor crest and re-gradereshyvegetate as necessary

NM

10 Repair erosion rills on buttress face in vicinity of starter dam and stabilize

NM

Conti

Conti

Conti

Conti

Conti USACE

Conti

Conti

Conti

Conti

Conti

C Initial repairs made in fall 2004 Lawn was inspected 62305 and no indications of damageruts

C Borrow area was over-seeded with perennial mix in April 2005 Additional seed placed in June in borrow area and at new topsoil area adjacent to the decant inlet Completed 61605

C Swale was inspected 61305 and based performance to date no additional stone is required

C Completed 61505 Pipe was removed and checkdiversion stone dam constructed

C Completed 62205 Pipe removed (see item 4) and the upper basin swale inlet elevation was lowered to divert flow to upper basin

C Completed 62305 Area was re-graded topsoil placed and seeded with perennial grass

C Completed 62105 Limited stabilization work completed in April 2005 including over-seed and repair of erosion at toe drain headwall Additional work completed in June includes topsoil in minor rills and hand-seed

C Completed 62305 Basins cleaned in February 2005 Re-clean upper basin in Spring 2005leaned again on 62305 Future maintenancecleaning of the basins is required

C Raked dead grass off slope and handseeded on 6905 Some areas to be hydroseeded with buttress

C Complete 62705 Regrade slope using existing material place 4-6 topsoilcompost blend erosion logs and hydroseed with Conex 3000 hydromulch and acid resistent seed Hydroseed to be completed on 62705

Punch-List Page 1of2

Confi Conti Environment amp Infrastructure Inc

11 Re-grade and stabilize buttress TN Conti C Regrade bench to 1-2 laterally and benchcrest from ~Station 5+50 to longitudinally (similar to east bench) downchute to reduce drainage down Place 4-6topsoil seed and install TRM buttress face and promote drainage similar to east side Protect downchute into central downchute inletjunction Completed on 62705

12 Remove erosion logs from re-grade NM Conti C Recommended leaving logs in place for slope erosion protection 62105

13 Clean inlet riser in lower sediment SA Conti C Completed on 62305 basin

14 Remove sediment from toe drain SA Conti C Completed on 62305 outlets at starter dam to prevent restriction of flow

15 Divert flow from 12 RCP at Jeep TN Conti C Swale constructed in April 2005 Swale is Rdborrow area into stabilized swale grass lined and adjacent rills filled with

peastone and covered with topsoil and seeded Completed on 61305

16 Repair toe drain outlet immediately SA Conti C Similar retrofication as east side toe drain east of starter dam - excavate outlet in 2004 Restore the oxygen low-perm pipe 20-30 feet and field-perforate barrier Completed on 61505 SDR pipe Backfill pipe in accordance with the design detail

17 Stabilize upper TP-1 crest from TN Conti C Place additional topsoilcompost and downchute location eastward hydromulchseed crest Re-grade crest to

minimize concentration of flows onto buttress regrade

18 Place topsoil and seed unvegetated SA Conti C Completed on 62305 area on top of TP1 adjacent to decant pond inlet

19 Install a stone lined swale in south SA Conti C Completed on 62205 end of borrow pit connecting to spillway where significant erosion is evident

20

21

Status Codes N = New Item O = Open Item C = Closed Completed Item

CQO Date

CQCSM Date

Punch-List Page 2 of 2

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

ATTACHMENT 3

PROJECT ACTION LIST SEPTEMBER 2005 REPAIRS

Conti

Elizabeth Mine 2005 Repairs - Phase II

02 August 2005

Buttress Repair Items No Description of Repair Item Description of Repair Mob 1 Light vegetation along west section 1 Remove ECM 1

of buttress face and bench Topsoil 2 Cutgrade high spot along 2 loose and organic newly graded section west of 2

downcomer 3 Hydroseed w mine mix 4 Installbench rolled mat logs

2 Two sections of buttress with little 1 Remove ECM 1 vegetation east and west edge of 2 Track surface to loosen soils 2 repair section Topsoil mineral 3 Place 2-4 of organic soil 2 based and compact 4 Track-in organic soil 2

5 Installbench rolled mat logs 6 Hydroseed w mine mix

3 Eroded section along west 1 Place 2-4 organic soil 2 embankment of starter dam and little 2 Hydroseed w mine mix vegetation 3 Installbench rolled mat logs

4 2 Rills at east embankment of starter 1 Fill major rills with 2 stone 2 dam 2 Fill minor rills with topsoil

and hand-seed 5 Area upslope of starter dam lightly 1 Place 2-4 organic soil and 2

vegetated Soil compact and low hydroseed w mine mix organic value 2 Installbench rolled mat logs

6 Light vegetation along east section 1 Remove ECM 1 of buttress face and bench Topsoil 2 Track bench to loosen soils 2 loose and organic 3 Hydroseed w mine mix 2

4 Installbench rolled mat logs Analyze existing topsoil to be re-hydroseeded and add amendments to hydromulch mix

(lime and fertilizer)

Borrow Area No Description of Repair Item 1 Minor rills and saturated soils along

east embankment toe (along jeep road)

2 Lightly vegetated areas

3 Stone channel at southwest corner of borrow area w minor rills and bank erosion

4 Light vegetation and sediment deposits in spillway (from borrow area erosion)

Description of Repair Mob 1 Construct a stone-lined (3) 2

channel (~4w x 2d) along edge of toe draining south to corner then west to connect with spillway stone transition

2 Re-gradeshim jeep road at southeast corner of borrow area to divert run-on

1 Fill low areas w organic soil 2 from channel excavation

2 Hydroseed entire borrow area using typical conservationslope mix

1 Fillgrade out minor rills 2 2 Hydroseed with repair No 3 3 Repair eroded bank with

additional 3 stone 1 Hand rake unvegetated areas 1 2 Hand-seed areas

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

ATTACHMENT 4

PROJECT PHOTOGRAPHS

Conti

_ _ _

- - bull bull -

Jeep Road Culvert at Borrow Area April 2005 I

Low-Flow Channel at Borrow Area April 2005

Field Perforation of the Toe-Drain Pipe June 2005

Restoring the Toe-Drain Pipe Area June 2005

Re-Grading of the West Buttress Crest June 2005

Placement of Additional Topsoil on Buttress September 2005

Placement of Additional Topsoil on Buttress September 2005

Hydroseeding of Buttress September 2005

RestoredVegetated Borrow Area September 2005

- lt (o

1. barcode 251692
2. barcodetext SEMS Doc ID 251692

ActivityID

Activity Description

Orig Dur

Rem Dur

Early Start

Early Finish

RESP

14 21 28 MAR

4APR

11 18 25 2MAY

9 16 23 30 6

2005 JUN

13 20 27 4JUL

11 18 25 1AUG

8 15 22 29 5SEP OCT

12 19 26 3 10 3170 Final Survey Buttress 1 1 0 05JUL05 05JUL05 CSUB VFinal Survey Buttress

Borrow Area Repairs 3110 RepairFill Erosion Rills 01JUL05 05JUL05 CONTI RepairFill Erosion Rills

3120 Construct Upper Sediment Basin 06JUL05 07JUL05 CONTI Construct Upper Sediment Basin

3130 Re-Grade Borrow Area 08JUL05 11JUL05 CONTI Re-Grade Borrow Area

3135 Place TopsoilCompost 12JUL05 14JUL05 CONTI Place TopsoilCompost

3140 Install Erosion Logs 15JUL05 15JUL05 CONTI Install Erosion Logs

3150 Hand-Place Rye Seed 18JUL05 18JUL05 CONTI JHandiPlace Rye Seed

3160 Hydroseed Area 19JUL05 19JUL05 CSUB Hydroseed Area

3180 Final Survey Borrow Area 20JUL05 20JUL05 CSUB Final Survey Bo row Area

Project Close-Out General Site

4000 Demobilize Equipment 15JUL05 19JUL05 CONTI J^Demobilize Equipment

4010 Demobilize Personnel 19JUL05 21JUL05 CONTI 7 Demobilize Personnel

4020 InvoicePayment Reconciliation 30 30 22JUL05 01SEP05 CONTI InvoicePayment Reconciliation^

4030 Final Billing amp Reporting 10 10 02SEP05 15SEP05 CONTI Final Billing amp Repor t ing^ IZIV

4040 Final Close-Out 15SEP05 CONTI Final Close-Out^

Start Date 14MAR05 Revision Summary m Early Bar Finish Date 15SEP05 Date Revision Checked Approved

- ^ 7 Float Bar TN

A= ^ f Progress Bar Data Date 04APR05 Conti Environment amp Infrastructure 23MAR05 DRAFT Schedule Rev 00 TN

Run Date 23MAR05 1033 ^m Critical Activity

Elizabeth Mine Buttress Repairs 2005

) Primavera Systems Inc

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

ATTACHMENT 2

PROJECT PUNCH-LIST 2005 SPRING REPAIRS

Conti

Conti Environment amp Infrastructure Inc Confi

Final Punch-List

Project Name ES TP-1 Elizabeth Mine Superfund Site Project No 0308001 Buttress Construction

Contract No DACW-33-0001-0003 CTO 0006 Date 62305 DFW Buttress Construction Project Completion

No Item

Not

ed B

y

Act

ion

By

Sta

tus

Cod

e Status Action (include dates)

1 Topsoil and seed neighbors front yard where trucks ran off the road

NM

2 Seed borrow area and upper TP-1 with Perennial seed mixture

NM

3 Evaluate stone-lining the western perimeter swale

JS

4 Remove 8 culvert in eastern swale on west side

JS

5

6

7

Evaluate realignment of eastern swale on west side of access road to divert flow into swale leading to upper sediment basin Grade out Northern slope of stone lined channel leading to upper sed basin (west side) to promote flow into the channel Re-grade and re-seed buttress toe area on east side and evaluate whether grass lined channels or stone swales are needed to prevent further erosion

JS

NM

NM

8 Clean out upper and lower sediment basins

NM

9 Monitor crest and re-gradereshyvegetate as necessary

NM

10 Repair erosion rills on buttress face in vicinity of starter dam and stabilize

NM

Conti

Conti

Conti

Conti

Conti USACE

Conti

Conti

Conti

Conti

Conti

C Initial repairs made in fall 2004 Lawn was inspected 62305 and no indications of damageruts

C Borrow area was over-seeded with perennial mix in April 2005 Additional seed placed in June in borrow area and at new topsoil area adjacent to the decant inlet Completed 61605

C Swale was inspected 61305 and based performance to date no additional stone is required

C Completed 61505 Pipe was removed and checkdiversion stone dam constructed

C Completed 62205 Pipe removed (see item 4) and the upper basin swale inlet elevation was lowered to divert flow to upper basin

C Completed 62305 Area was re-graded topsoil placed and seeded with perennial grass

C Completed 62105 Limited stabilization work completed in April 2005 including over-seed and repair of erosion at toe drain headwall Additional work completed in June includes topsoil in minor rills and hand-seed

C Completed 62305 Basins cleaned in February 2005 Re-clean upper basin in Spring 2005leaned again on 62305 Future maintenancecleaning of the basins is required

C Raked dead grass off slope and handseeded on 6905 Some areas to be hydroseeded with buttress

C Complete 62705 Regrade slope using existing material place 4-6 topsoilcompost blend erosion logs and hydroseed with Conex 3000 hydromulch and acid resistent seed Hydroseed to be completed on 62705

Punch-List Page 1of2

Confi Conti Environment amp Infrastructure Inc

11 Re-grade and stabilize buttress TN Conti C Regrade bench to 1-2 laterally and benchcrest from ~Station 5+50 to longitudinally (similar to east bench) downchute to reduce drainage down Place 4-6topsoil seed and install TRM buttress face and promote drainage similar to east side Protect downchute into central downchute inletjunction Completed on 62705

12 Remove erosion logs from re-grade NM Conti C Recommended leaving logs in place for slope erosion protection 62105

13 Clean inlet riser in lower sediment SA Conti C Completed on 62305 basin

14 Remove sediment from toe drain SA Conti C Completed on 62305 outlets at starter dam to prevent restriction of flow

15 Divert flow from 12 RCP at Jeep TN Conti C Swale constructed in April 2005 Swale is Rdborrow area into stabilized swale grass lined and adjacent rills filled with

peastone and covered with topsoil and seeded Completed on 61305

16 Repair toe drain outlet immediately SA Conti C Similar retrofication as east side toe drain east of starter dam - excavate outlet in 2004 Restore the oxygen low-perm pipe 20-30 feet and field-perforate barrier Completed on 61505 SDR pipe Backfill pipe in accordance with the design detail

17 Stabilize upper TP-1 crest from TN Conti C Place additional topsoilcompost and downchute location eastward hydromulchseed crest Re-grade crest to

minimize concentration of flows onto buttress regrade

18 Place topsoil and seed unvegetated SA Conti C Completed on 62305 area on top of TP1 adjacent to decant pond inlet

19 Install a stone lined swale in south SA Conti C Completed on 62205 end of borrow pit connecting to spillway where significant erosion is evident

20

21

Status Codes N = New Item O = Open Item C = Closed Completed Item

CQO Date

CQCSM Date

Punch-List Page 2 of 2

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

ATTACHMENT 3

PROJECT ACTION LIST SEPTEMBER 2005 REPAIRS

Conti

Elizabeth Mine 2005 Repairs - Phase II

02 August 2005

Buttress Repair Items No Description of Repair Item Description of Repair Mob 1 Light vegetation along west section 1 Remove ECM 1

of buttress face and bench Topsoil 2 Cutgrade high spot along 2 loose and organic newly graded section west of 2

downcomer 3 Hydroseed w mine mix 4 Installbench rolled mat logs

2 Two sections of buttress with little 1 Remove ECM 1 vegetation east and west edge of 2 Track surface to loosen soils 2 repair section Topsoil mineral 3 Place 2-4 of organic soil 2 based and compact 4 Track-in organic soil 2

5 Installbench rolled mat logs 6 Hydroseed w mine mix

3 Eroded section along west 1 Place 2-4 organic soil 2 embankment of starter dam and little 2 Hydroseed w mine mix vegetation 3 Installbench rolled mat logs

4 2 Rills at east embankment of starter 1 Fill major rills with 2 stone 2 dam 2 Fill minor rills with topsoil

and hand-seed 5 Area upslope of starter dam lightly 1 Place 2-4 organic soil and 2

vegetated Soil compact and low hydroseed w mine mix organic value 2 Installbench rolled mat logs

6 Light vegetation along east section 1 Remove ECM 1 of buttress face and bench Topsoil 2 Track bench to loosen soils 2 loose and organic 3 Hydroseed w mine mix 2

4 Installbench rolled mat logs Analyze existing topsoil to be re-hydroseeded and add amendments to hydromulch mix

(lime and fertilizer)

Borrow Area No Description of Repair Item 1 Minor rills and saturated soils along

east embankment toe (along jeep road)

2 Lightly vegetated areas

3 Stone channel at southwest corner of borrow area w minor rills and bank erosion

4 Light vegetation and sediment deposits in spillway (from borrow area erosion)

Description of Repair Mob 1 Construct a stone-lined (3) 2

channel (~4w x 2d) along edge of toe draining south to corner then west to connect with spillway stone transition

2 Re-gradeshim jeep road at southeast corner of borrow area to divert run-on

1 Fill low areas w organic soil 2 from channel excavation

2 Hydroseed entire borrow area using typical conservationslope mix

1 Fillgrade out minor rills 2 2 Hydroseed with repair No 3 3 Repair eroded bank with

additional 3 stone 1 Hand rake unvegetated areas 1 2 Hand-seed areas

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

ATTACHMENT 4

PROJECT PHOTOGRAPHS

Conti

_ _ _

- - bull bull -

Jeep Road Culvert at Borrow Area April 2005 I

Low-Flow Channel at Borrow Area April 2005

Field Perforation of the Toe-Drain Pipe June 2005

Restoring the Toe-Drain Pipe Area June 2005

Re-Grading of the West Buttress Crest June 2005

Placement of Additional Topsoil on Buttress September 2005

Placement of Additional Topsoil on Buttress September 2005

Hydroseeding of Buttress September 2005

RestoredVegetated Borrow Area September 2005

- lt (o

1. barcode 251692
2. barcodetext SEMS Doc ID 251692

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

ATTACHMENT 2

PROJECT PUNCH-LIST 2005 SPRING REPAIRS

Conti

Conti Environment amp Infrastructure Inc Confi

Final Punch-List

Project Name ES TP-1 Elizabeth Mine Superfund Site Project No 0308001 Buttress Construction

Contract No DACW-33-0001-0003 CTO 0006 Date 62305 DFW Buttress Construction Project Completion

No Item

Not

ed B

y

Act

ion

By

Sta

tus

Cod

e Status Action (include dates)

1 Topsoil and seed neighbors front yard where trucks ran off the road

NM

2 Seed borrow area and upper TP-1 with Perennial seed mixture

NM

3 Evaluate stone-lining the western perimeter swale

JS

4 Remove 8 culvert in eastern swale on west side

JS

5

6

7

Evaluate realignment of eastern swale on west side of access road to divert flow into swale leading to upper sediment basin Grade out Northern slope of stone lined channel leading to upper sed basin (west side) to promote flow into the channel Re-grade and re-seed buttress toe area on east side and evaluate whether grass lined channels or stone swales are needed to prevent further erosion

JS

NM

NM

8 Clean out upper and lower sediment basins

NM

9 Monitor crest and re-gradereshyvegetate as necessary

NM

10 Repair erosion rills on buttress face in vicinity of starter dam and stabilize

NM

Conti

Conti

Conti

Conti

Conti USACE

Conti

Conti

Conti

Conti

Conti

C Initial repairs made in fall 2004 Lawn was inspected 62305 and no indications of damageruts

C Borrow area was over-seeded with perennial mix in April 2005 Additional seed placed in June in borrow area and at new topsoil area adjacent to the decant inlet Completed 61605

C Swale was inspected 61305 and based performance to date no additional stone is required

C Completed 61505 Pipe was removed and checkdiversion stone dam constructed

C Completed 62205 Pipe removed (see item 4) and the upper basin swale inlet elevation was lowered to divert flow to upper basin

C Completed 62305 Area was re-graded topsoil placed and seeded with perennial grass

C Completed 62105 Limited stabilization work completed in April 2005 including over-seed and repair of erosion at toe drain headwall Additional work completed in June includes topsoil in minor rills and hand-seed

C Completed 62305 Basins cleaned in February 2005 Re-clean upper basin in Spring 2005leaned again on 62305 Future maintenancecleaning of the basins is required

C Raked dead grass off slope and handseeded on 6905 Some areas to be hydroseeded with buttress

C Complete 62705 Regrade slope using existing material place 4-6 topsoilcompost blend erosion logs and hydroseed with Conex 3000 hydromulch and acid resistent seed Hydroseed to be completed on 62705

Punch-List Page 1of2

Confi Conti Environment amp Infrastructure Inc

11 Re-grade and stabilize buttress TN Conti C Regrade bench to 1-2 laterally and benchcrest from ~Station 5+50 to longitudinally (similar to east bench) downchute to reduce drainage down Place 4-6topsoil seed and install TRM buttress face and promote drainage similar to east side Protect downchute into central downchute inletjunction Completed on 62705

12 Remove erosion logs from re-grade NM Conti C Recommended leaving logs in place for slope erosion protection 62105

13 Clean inlet riser in lower sediment SA Conti C Completed on 62305 basin

14 Remove sediment from toe drain SA Conti C Completed on 62305 outlets at starter dam to prevent restriction of flow

15 Divert flow from 12 RCP at Jeep TN Conti C Swale constructed in April 2005 Swale is Rdborrow area into stabilized swale grass lined and adjacent rills filled with

peastone and covered with topsoil and seeded Completed on 61305

16 Repair toe drain outlet immediately SA Conti C Similar retrofication as east side toe drain east of starter dam - excavate outlet in 2004 Restore the oxygen low-perm pipe 20-30 feet and field-perforate barrier Completed on 61505 SDR pipe Backfill pipe in accordance with the design detail

17 Stabilize upper TP-1 crest from TN Conti C Place additional topsoilcompost and downchute location eastward hydromulchseed crest Re-grade crest to

minimize concentration of flows onto buttress regrade

18 Place topsoil and seed unvegetated SA Conti C Completed on 62305 area on top of TP1 adjacent to decant pond inlet

19 Install a stone lined swale in south SA Conti C Completed on 62205 end of borrow pit connecting to spillway where significant erosion is evident

20

21

Status Codes N = New Item O = Open Item C = Closed Completed Item

CQO Date

CQCSM Date

Punch-List Page 2 of 2

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

ATTACHMENT 3

PROJECT ACTION LIST SEPTEMBER 2005 REPAIRS

Conti

Elizabeth Mine 2005 Repairs - Phase II

02 August 2005

Buttress Repair Items No Description of Repair Item Description of Repair Mob 1 Light vegetation along west section 1 Remove ECM 1

of buttress face and bench Topsoil 2 Cutgrade high spot along 2 loose and organic newly graded section west of 2

downcomer 3 Hydroseed w mine mix 4 Installbench rolled mat logs

2 Two sections of buttress with little 1 Remove ECM 1 vegetation east and west edge of 2 Track surface to loosen soils 2 repair section Topsoil mineral 3 Place 2-4 of organic soil 2 based and compact 4 Track-in organic soil 2

5 Installbench rolled mat logs 6 Hydroseed w mine mix

3 Eroded section along west 1 Place 2-4 organic soil 2 embankment of starter dam and little 2 Hydroseed w mine mix vegetation 3 Installbench rolled mat logs

4 2 Rills at east embankment of starter 1 Fill major rills with 2 stone 2 dam 2 Fill minor rills with topsoil

and hand-seed 5 Area upslope of starter dam lightly 1 Place 2-4 organic soil and 2

vegetated Soil compact and low hydroseed w mine mix organic value 2 Installbench rolled mat logs

6 Light vegetation along east section 1 Remove ECM 1 of buttress face and bench Topsoil 2 Track bench to loosen soils 2 loose and organic 3 Hydroseed w mine mix 2

4 Installbench rolled mat logs Analyze existing topsoil to be re-hydroseeded and add amendments to hydromulch mix

(lime and fertilizer)

Borrow Area No Description of Repair Item 1 Minor rills and saturated soils along

east embankment toe (along jeep road)

2 Lightly vegetated areas

3 Stone channel at southwest corner of borrow area w minor rills and bank erosion

4 Light vegetation and sediment deposits in spillway (from borrow area erosion)

Description of Repair Mob 1 Construct a stone-lined (3) 2

channel (~4w x 2d) along edge of toe draining south to corner then west to connect with spillway stone transition

2 Re-gradeshim jeep road at southeast corner of borrow area to divert run-on

1 Fill low areas w organic soil 2 from channel excavation

2 Hydroseed entire borrow area using typical conservationslope mix

1 Fillgrade out minor rills 2 2 Hydroseed with repair No 3 3 Repair eroded bank with

additional 3 stone 1 Hand rake unvegetated areas 1 2 Hand-seed areas

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

ATTACHMENT 4

PROJECT PHOTOGRAPHS

Conti

_ _ _

- - bull bull -

Jeep Road Culvert at Borrow Area April 2005 I

Low-Flow Channel at Borrow Area April 2005

Field Perforation of the Toe-Drain Pipe June 2005

Restoring the Toe-Drain Pipe Area June 2005

Re-Grading of the West Buttress Crest June 2005

Placement of Additional Topsoil on Buttress September 2005

Placement of Additional Topsoil on Buttress September 2005

Hydroseeding of Buttress September 2005

RestoredVegetated Borrow Area September 2005

- lt (o

1. barcode 251692
2. barcodetext SEMS Doc ID 251692

Conti Environment amp Infrastructure Inc Confi

Final Punch-List

Project Name ES TP-1 Elizabeth Mine Superfund Site Project No 0308001 Buttress Construction

Contract No DACW-33-0001-0003 CTO 0006 Date 62305 DFW Buttress Construction Project Completion

No Item

Not

ed B

y

Act

ion

By

Sta

tus

Cod

e Status Action (include dates)

1 Topsoil and seed neighbors front yard where trucks ran off the road

NM

2 Seed borrow area and upper TP-1 with Perennial seed mixture

NM

3 Evaluate stone-lining the western perimeter swale

JS

4 Remove 8 culvert in eastern swale on west side

JS

5

6

7

Evaluate realignment of eastern swale on west side of access road to divert flow into swale leading to upper sediment basin Grade out Northern slope of stone lined channel leading to upper sed basin (west side) to promote flow into the channel Re-grade and re-seed buttress toe area on east side and evaluate whether grass lined channels or stone swales are needed to prevent further erosion

JS

NM

NM

8 Clean out upper and lower sediment basins

NM

9 Monitor crest and re-gradereshyvegetate as necessary

NM

10 Repair erosion rills on buttress face in vicinity of starter dam and stabilize

NM

Conti

Conti

Conti

Conti

Conti USACE

Conti

Conti

Conti

Conti

Conti

C Initial repairs made in fall 2004 Lawn was inspected 62305 and no indications of damageruts

C Borrow area was over-seeded with perennial mix in April 2005 Additional seed placed in June in borrow area and at new topsoil area adjacent to the decant inlet Completed 61605

C Swale was inspected 61305 and based performance to date no additional stone is required

C Completed 61505 Pipe was removed and checkdiversion stone dam constructed

C Completed 62205 Pipe removed (see item 4) and the upper basin swale inlet elevation was lowered to divert flow to upper basin

C Completed 62305 Area was re-graded topsoil placed and seeded with perennial grass

C Completed 62105 Limited stabilization work completed in April 2005 including over-seed and repair of erosion at toe drain headwall Additional work completed in June includes topsoil in minor rills and hand-seed

C Completed 62305 Basins cleaned in February 2005 Re-clean upper basin in Spring 2005leaned again on 62305 Future maintenancecleaning of the basins is required

C Raked dead grass off slope and handseeded on 6905 Some areas to be hydroseeded with buttress

C Complete 62705 Regrade slope using existing material place 4-6 topsoilcompost blend erosion logs and hydroseed with Conex 3000 hydromulch and acid resistent seed Hydroseed to be completed on 62705

Punch-List Page 1of2

Confi Conti Environment amp Infrastructure Inc

11 Re-grade and stabilize buttress TN Conti C Regrade bench to 1-2 laterally and benchcrest from ~Station 5+50 to longitudinally (similar to east bench) downchute to reduce drainage down Place 4-6topsoil seed and install TRM buttress face and promote drainage similar to east side Protect downchute into central downchute inletjunction Completed on 62705

12 Remove erosion logs from re-grade NM Conti C Recommended leaving logs in place for slope erosion protection 62105

13 Clean inlet riser in lower sediment SA Conti C Completed on 62305 basin

14 Remove sediment from toe drain SA Conti C Completed on 62305 outlets at starter dam to prevent restriction of flow

15 Divert flow from 12 RCP at Jeep TN Conti C Swale constructed in April 2005 Swale is Rdborrow area into stabilized swale grass lined and adjacent rills filled with

peastone and covered with topsoil and seeded Completed on 61305

16 Repair toe drain outlet immediately SA Conti C Similar retrofication as east side toe drain east of starter dam - excavate outlet in 2004 Restore the oxygen low-perm pipe 20-30 feet and field-perforate barrier Completed on 61505 SDR pipe Backfill pipe in accordance with the design detail

17 Stabilize upper TP-1 crest from TN Conti C Place additional topsoilcompost and downchute location eastward hydromulchseed crest Re-grade crest to

minimize concentration of flows onto buttress regrade

18 Place topsoil and seed unvegetated SA Conti C Completed on 62305 area on top of TP1 adjacent to decant pond inlet

19 Install a stone lined swale in south SA Conti C Completed on 62205 end of borrow pit connecting to spillway where significant erosion is evident

20

21

Status Codes N = New Item O = Open Item C = Closed Completed Item

CQO Date

CQCSM Date

Punch-List Page 2 of 2

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

ATTACHMENT 3

PROJECT ACTION LIST SEPTEMBER 2005 REPAIRS

Conti

Elizabeth Mine 2005 Repairs - Phase II

02 August 2005

Buttress Repair Items No Description of Repair Item Description of Repair Mob 1 Light vegetation along west section 1 Remove ECM 1

of buttress face and bench Topsoil 2 Cutgrade high spot along 2 loose and organic newly graded section west of 2

downcomer 3 Hydroseed w mine mix 4 Installbench rolled mat logs

2 Two sections of buttress with little 1 Remove ECM 1 vegetation east and west edge of 2 Track surface to loosen soils 2 repair section Topsoil mineral 3 Place 2-4 of organic soil 2 based and compact 4 Track-in organic soil 2

5 Installbench rolled mat logs 6 Hydroseed w mine mix

3 Eroded section along west 1 Place 2-4 organic soil 2 embankment of starter dam and little 2 Hydroseed w mine mix vegetation 3 Installbench rolled mat logs

4 2 Rills at east embankment of starter 1 Fill major rills with 2 stone 2 dam 2 Fill minor rills with topsoil

and hand-seed 5 Area upslope of starter dam lightly 1 Place 2-4 organic soil and 2

vegetated Soil compact and low hydroseed w mine mix organic value 2 Installbench rolled mat logs

6 Light vegetation along east section 1 Remove ECM 1 of buttress face and bench Topsoil 2 Track bench to loosen soils 2 loose and organic 3 Hydroseed w mine mix 2

4 Installbench rolled mat logs Analyze existing topsoil to be re-hydroseeded and add amendments to hydromulch mix

(lime and fertilizer)

Borrow Area No Description of Repair Item 1 Minor rills and saturated soils along

east embankment toe (along jeep road)

2 Lightly vegetated areas

3 Stone channel at southwest corner of borrow area w minor rills and bank erosion

4 Light vegetation and sediment deposits in spillway (from borrow area erosion)

Description of Repair Mob 1 Construct a stone-lined (3) 2

channel (~4w x 2d) along edge of toe draining south to corner then west to connect with spillway stone transition

2 Re-gradeshim jeep road at southeast corner of borrow area to divert run-on

1 Fill low areas w organic soil 2 from channel excavation

2 Hydroseed entire borrow area using typical conservationslope mix

1 Fillgrade out minor rills 2 2 Hydroseed with repair No 3 3 Repair eroded bank with

additional 3 stone 1 Hand rake unvegetated areas 1 2 Hand-seed areas

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

ATTACHMENT 4

PROJECT PHOTOGRAPHS

Conti

_ _ _

- - bull bull -

Jeep Road Culvert at Borrow Area April 2005 I

Low-Flow Channel at Borrow Area April 2005

Field Perforation of the Toe-Drain Pipe June 2005

Restoring the Toe-Drain Pipe Area June 2005

Re-Grading of the West Buttress Crest June 2005

Placement of Additional Topsoil on Buttress September 2005

Placement of Additional Topsoil on Buttress September 2005

Hydroseeding of Buttress September 2005

RestoredVegetated Borrow Area September 2005

- lt (o

1. barcode 251692
2. barcodetext SEMS Doc ID 251692

Confi Conti Environment amp Infrastructure Inc

11 Re-grade and stabilize buttress TN Conti C Regrade bench to 1-2 laterally and benchcrest from ~Station 5+50 to longitudinally (similar to east bench) downchute to reduce drainage down Place 4-6topsoil seed and install TRM buttress face and promote drainage similar to east side Protect downchute into central downchute inletjunction Completed on 62705

12 Remove erosion logs from re-grade NM Conti C Recommended leaving logs in place for slope erosion protection 62105

13 Clean inlet riser in lower sediment SA Conti C Completed on 62305 basin

14 Remove sediment from toe drain SA Conti C Completed on 62305 outlets at starter dam to prevent restriction of flow

15 Divert flow from 12 RCP at Jeep TN Conti C Swale constructed in April 2005 Swale is Rdborrow area into stabilized swale grass lined and adjacent rills filled with

peastone and covered with topsoil and seeded Completed on 61305

16 Repair toe drain outlet immediately SA Conti C Similar retrofication as east side toe drain east of starter dam - excavate outlet in 2004 Restore the oxygen low-perm pipe 20-30 feet and field-perforate barrier Completed on 61505 SDR pipe Backfill pipe in accordance with the design detail

17 Stabilize upper TP-1 crest from TN Conti C Place additional topsoilcompost and downchute location eastward hydromulchseed crest Re-grade crest to

minimize concentration of flows onto buttress regrade

18 Place topsoil and seed unvegetated SA Conti C Completed on 62305 area on top of TP1 adjacent to decant pond inlet

19 Install a stone lined swale in south SA Conti C Completed on 62205 end of borrow pit connecting to spillway where significant erosion is evident

20

21

Status Codes N = New Item O = Open Item C = Closed Completed Item

CQO Date

CQCSM Date

Punch-List Page 2 of 2

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

ATTACHMENT 3

PROJECT ACTION LIST SEPTEMBER 2005 REPAIRS

Conti

Elizabeth Mine 2005 Repairs - Phase II

02 August 2005

Buttress Repair Items No Description of Repair Item Description of Repair Mob 1 Light vegetation along west section 1 Remove ECM 1

of buttress face and bench Topsoil 2 Cutgrade high spot along 2 loose and organic newly graded section west of 2

downcomer 3 Hydroseed w mine mix 4 Installbench rolled mat logs

2 Two sections of buttress with little 1 Remove ECM 1 vegetation east and west edge of 2 Track surface to loosen soils 2 repair section Topsoil mineral 3 Place 2-4 of organic soil 2 based and compact 4 Track-in organic soil 2

5 Installbench rolled mat logs 6 Hydroseed w mine mix

3 Eroded section along west 1 Place 2-4 organic soil 2 embankment of starter dam and little 2 Hydroseed w mine mix vegetation 3 Installbench rolled mat logs

4 2 Rills at east embankment of starter 1 Fill major rills with 2 stone 2 dam 2 Fill minor rills with topsoil

and hand-seed 5 Area upslope of starter dam lightly 1 Place 2-4 organic soil and 2

vegetated Soil compact and low hydroseed w mine mix organic value 2 Installbench rolled mat logs

6 Light vegetation along east section 1 Remove ECM 1 of buttress face and bench Topsoil 2 Track bench to loosen soils 2 loose and organic 3 Hydroseed w mine mix 2

4 Installbench rolled mat logs Analyze existing topsoil to be re-hydroseeded and add amendments to hydromulch mix

(lime and fertilizer)

Borrow Area No Description of Repair Item 1 Minor rills and saturated soils along

east embankment toe (along jeep road)

2 Lightly vegetated areas

3 Stone channel at southwest corner of borrow area w minor rills and bank erosion

4 Light vegetation and sediment deposits in spillway (from borrow area erosion)

Description of Repair Mob 1 Construct a stone-lined (3) 2

channel (~4w x 2d) along edge of toe draining south to corner then west to connect with spillway stone transition

2 Re-gradeshim jeep road at southeast corner of borrow area to divert run-on

1 Fill low areas w organic soil 2 from channel excavation

2 Hydroseed entire borrow area using typical conservationslope mix

1 Fillgrade out minor rills 2 2 Hydroseed with repair No 3 3 Repair eroded bank with

additional 3 stone 1 Hand rake unvegetated areas 1 2 Hand-seed areas

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

ATTACHMENT 4

PROJECT PHOTOGRAPHS

Conti

_ _ _

- - bull bull -

Jeep Road Culvert at Borrow Area April 2005 I

Low-Flow Channel at Borrow Area April 2005

Field Perforation of the Toe-Drain Pipe June 2005

Restoring the Toe-Drain Pipe Area June 2005

Re-Grading of the West Buttress Crest June 2005

Placement of Additional Topsoil on Buttress September 2005

Placement of Additional Topsoil on Buttress September 2005

Hydroseeding of Buttress September 2005

RestoredVegetated Borrow Area September 2005

- lt (o

1. barcode 251692
2. barcodetext SEMS Doc ID 251692

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

ATTACHMENT 3

PROJECT ACTION LIST SEPTEMBER 2005 REPAIRS

Conti

Elizabeth Mine 2005 Repairs - Phase II

02 August 2005

Buttress Repair Items No Description of Repair Item Description of Repair Mob 1 Light vegetation along west section 1 Remove ECM 1

of buttress face and bench Topsoil 2 Cutgrade high spot along 2 loose and organic newly graded section west of 2

downcomer 3 Hydroseed w mine mix 4 Installbench rolled mat logs

2 Two sections of buttress with little 1 Remove ECM 1 vegetation east and west edge of 2 Track surface to loosen soils 2 repair section Topsoil mineral 3 Place 2-4 of organic soil 2 based and compact 4 Track-in organic soil 2

5 Installbench rolled mat logs 6 Hydroseed w mine mix

3 Eroded section along west 1 Place 2-4 organic soil 2 embankment of starter dam and little 2 Hydroseed w mine mix vegetation 3 Installbench rolled mat logs

4 2 Rills at east embankment of starter 1 Fill major rills with 2 stone 2 dam 2 Fill minor rills with topsoil

and hand-seed 5 Area upslope of starter dam lightly 1 Place 2-4 organic soil and 2

vegetated Soil compact and low hydroseed w mine mix organic value 2 Installbench rolled mat logs

6 Light vegetation along east section 1 Remove ECM 1 of buttress face and bench Topsoil 2 Track bench to loosen soils 2 loose and organic 3 Hydroseed w mine mix 2

4 Installbench rolled mat logs Analyze existing topsoil to be re-hydroseeded and add amendments to hydromulch mix

(lime and fertilizer)

Borrow Area No Description of Repair Item 1 Minor rills and saturated soils along

east embankment toe (along jeep road)

2 Lightly vegetated areas

3 Stone channel at southwest corner of borrow area w minor rills and bank erosion

4 Light vegetation and sediment deposits in spillway (from borrow area erosion)

Description of Repair Mob 1 Construct a stone-lined (3) 2

channel (~4w x 2d) along edge of toe draining south to corner then west to connect with spillway stone transition

2 Re-gradeshim jeep road at southeast corner of borrow area to divert run-on

1 Fill low areas w organic soil 2 from channel excavation

2 Hydroseed entire borrow area using typical conservationslope mix

1 Fillgrade out minor rills 2 2 Hydroseed with repair No 3 3 Repair eroded bank with

additional 3 stone 1 Hand rake unvegetated areas 1 2 Hand-seed areas

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

ATTACHMENT 4

PROJECT PHOTOGRAPHS

Conti

_ _ _

- - bull bull -

Jeep Road Culvert at Borrow Area April 2005 I

Low-Flow Channel at Borrow Area April 2005

Field Perforation of the Toe-Drain Pipe June 2005

Restoring the Toe-Drain Pipe Area June 2005

Re-Grading of the West Buttress Crest June 2005

Placement of Additional Topsoil on Buttress September 2005

Placement of Additional Topsoil on Buttress September 2005

Hydroseeding of Buttress September 2005

RestoredVegetated Borrow Area September 2005

- lt (o

1. barcode 251692
2. barcodetext SEMS Doc ID 251692

Elizabeth Mine 2005 Repairs - Phase II

02 August 2005

Buttress Repair Items No Description of Repair Item Description of Repair Mob 1 Light vegetation along west section 1 Remove ECM 1

of buttress face and bench Topsoil 2 Cutgrade high spot along 2 loose and organic newly graded section west of 2

downcomer 3 Hydroseed w mine mix 4 Installbench rolled mat logs

2 Two sections of buttress with little 1 Remove ECM 1 vegetation east and west edge of 2 Track surface to loosen soils 2 repair section Topsoil mineral 3 Place 2-4 of organic soil 2 based and compact 4 Track-in organic soil 2

5 Installbench rolled mat logs 6 Hydroseed w mine mix

3 Eroded section along west 1 Place 2-4 organic soil 2 embankment of starter dam and little 2 Hydroseed w mine mix vegetation 3 Installbench rolled mat logs

4 2 Rills at east embankment of starter 1 Fill major rills with 2 stone 2 dam 2 Fill minor rills with topsoil

and hand-seed 5 Area upslope of starter dam lightly 1 Place 2-4 organic soil and 2

vegetated Soil compact and low hydroseed w mine mix organic value 2 Installbench rolled mat logs

6 Light vegetation along east section 1 Remove ECM 1 of buttress face and bench Topsoil 2 Track bench to loosen soils 2 loose and organic 3 Hydroseed w mine mix 2

4 Installbench rolled mat logs Analyze existing topsoil to be re-hydroseeded and add amendments to hydromulch mix

(lime and fertilizer)

Borrow Area No Description of Repair Item 1 Minor rills and saturated soils along

east embankment toe (along jeep road)

2 Lightly vegetated areas

3 Stone channel at southwest corner of borrow area w minor rills and bank erosion

4 Light vegetation and sediment deposits in spillway (from borrow area erosion)

Description of Repair Mob 1 Construct a stone-lined (3) 2

channel (~4w x 2d) along edge of toe draining south to corner then west to connect with spillway stone transition

2 Re-gradeshim jeep road at southeast corner of borrow area to divert run-on

1 Fill low areas w organic soil 2 from channel excavation

2 Hydroseed entire borrow area using typical conservationslope mix

1 Fillgrade out minor rills 2 2 Hydroseed with repair No 3 3 Repair eroded bank with

additional 3 stone 1 Hand rake unvegetated areas 1 2 Hand-seed areas

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

ATTACHMENT 4

PROJECT PHOTOGRAPHS

Conti

_ _ _

- - bull bull -

Jeep Road Culvert at Borrow Area April 2005 I

Low-Flow Channel at Borrow Area April 2005

Field Perforation of the Toe-Drain Pipe June 2005

Restoring the Toe-Drain Pipe Area June 2005

Re-Grading of the West Buttress Crest June 2005

Placement of Additional Topsoil on Buttress September 2005

Placement of Additional Topsoil on Buttress September 2005

Hydroseeding of Buttress September 2005

RestoredVegetated Borrow Area September 2005

- lt (o

1. barcode 251692
2. barcodetext SEMS Doc ID 251692

Borrow Area No Description of Repair Item 1 Minor rills and saturated soils along

east embankment toe (along jeep road)

2 Lightly vegetated areas

3 Stone channel at southwest corner of borrow area w minor rills and bank erosion

4 Light vegetation and sediment deposits in spillway (from borrow area erosion)

Description of Repair Mob 1 Construct a stone-lined (3) 2

channel (~4w x 2d) along edge of toe draining south to corner then west to connect with spillway stone transition

2 Re-gradeshim jeep road at southeast corner of borrow area to divert run-on

1 Fill low areas w organic soil 2 from channel excavation

2 Hydroseed entire borrow area using typical conservationslope mix

1 Fillgrade out minor rills 2 2 Hydroseed with repair No 3 3 Repair eroded bank with

additional 3 stone 1 Hand rake unvegetated areas 1 2 Hand-seed areas

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

ATTACHMENT 4

PROJECT PHOTOGRAPHS

Conti

_ _ _

- - bull bull -

Jeep Road Culvert at Borrow Area April 2005 I

Low-Flow Channel at Borrow Area April 2005

Field Perforation of the Toe-Drain Pipe June 2005

Restoring the Toe-Drain Pipe Area June 2005

Re-Grading of the West Buttress Crest June 2005

Placement of Additional Topsoil on Buttress September 2005

Placement of Additional Topsoil on Buttress September 2005

Hydroseeding of Buttress September 2005

RestoredVegetated Borrow Area September 2005

- lt (o

1. barcode 251692
2. barcodetext SEMS Doc ID 251692

ADDENDUM NO 1 - Final Construction Documentation and Certification Report Emergency Stabilization ofTP-1 Buttress Construction Elizabeth Mine Superfund Site July 2006

ATTACHMENT 4

PROJECT PHOTOGRAPHS

Conti

_ _ _

- - bull bull -

Jeep Road Culvert at Borrow Area April 2005 I

Low-Flow Channel at Borrow Area April 2005

Field Perforation of the Toe-Drain Pipe June 2005

Restoring the Toe-Drain Pipe Area June 2005

Re-Grading of the West Buttress Crest June 2005

Placement of Additional Topsoil on Buttress September 2005

Placement of Additional Topsoil on Buttress September 2005

Hydroseeding of Buttress September 2005

RestoredVegetated Borrow Area September 2005

- lt (o

1. barcode 251692
2. barcodetext SEMS Doc ID 251692

_ _ _

- - bull bull -

Jeep Road Culvert at Borrow Area April 2005 I

Low-Flow Channel at Borrow Area April 2005

Field Perforation of the Toe-Drain Pipe June 2005

Restoring the Toe-Drain Pipe Area June 2005

Re-Grading of the West Buttress Crest June 2005

Placement of Additional Topsoil on Buttress September 2005

Placement of Additional Topsoil on Buttress September 2005

Hydroseeding of Buttress September 2005

RestoredVegetated Borrow Area September 2005

- lt (o

1. barcode 251692
2. barcodetext SEMS Doc ID 251692

Field Perforation of the Toe-Drain Pipe June 2005

Restoring the Toe-Drain Pipe Area June 2005

Re-Grading of the West Buttress Crest June 2005

Placement of Additional Topsoil on Buttress September 2005

Placement of Additional Topsoil on Buttress September 2005

Hydroseeding of Buttress September 2005

RestoredVegetated Borrow Area September 2005

- lt (o

1. barcode 251692
2. barcodetext SEMS Doc ID 251692

Re-Grading of the West Buttress Crest June 2005

Placement of Additional Topsoil on Buttress September 2005

Placement of Additional Topsoil on Buttress September 2005

Hydroseeding of Buttress September 2005

RestoredVegetated Borrow Area September 2005

- lt (o

1. barcode 251692
2. barcodetext SEMS Doc ID 251692

Placement of Additional Topsoil on Buttress September 2005

Hydroseeding of Buttress September 2005

RestoredVegetated Borrow Area September 2005

- lt (o

1. barcode 251692
2. barcodetext SEMS Doc ID 251692

RestoredVegetated Borrow Area September 2005

- lt (o

1. barcode 251692
2. barcodetext SEMS Doc ID 251692