STRUCTURAL EVALUATION

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Corey Clark
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1 SMELTER BUILDINGS STRUCTURAL EVALUATION Resolution Copper Mining, LLC West Plant Area September 7, 2016

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3 Structural Evaluation PROJECT SCOPE OF WORK The purpose of this evaluation was to determine the general overall structural condition of each building, identify general structural repair work necessary for re-use of each building and prepare a conceptual cost estimate for the work. The inspection was conducted on July 27 and 28, 2016 by Jason Riggs, PE and Chris Wancata, FE of Arcadis..

4 Structural Evaluation PROJECT SCOPE OF WORK

5 Structural Evaluation SUMMARY OF OBSERVATIONS The buildings were visually inspected from ground level. The following descriptors were used to determine the overall condition assigned to each building: Good: Above average for this type and age of building system in this geographic area. No immediate repair work required or recommended. Fair: Average condition for this type and age of building system in this geographic area. Some work may be required or recommended primarily due to the normal aging of the building system or material. Poor: Below average condition for this type and age of building system in this geographic area. Significant work required to return building system or material to normal operating condition.

6 Structural Evaluation CONCLUSIONS AND RECOMMENDATIONS The table on the following slide indicates Arcadis opinion of the overall condition of each building to complete recommended repairs*, where applicable. *Recommendations are limited to structural and building enclosure elements only and do not include environmental remediation, electrical, mechanical and plumbing systems, architectural finishes, insulation, life safety / fire suppression and alarm systems or site civil utilities. Repairs are based on replacement of deficient structural and building enclosure items with similar materials and do not consider upgrades that may be required for change in use or occupancy.

7 Structural Evaluation Summary of Structural Condition Building No. and Name General Structural Condition Building 189 Smelter Office Poor Building 194 Change House Fair to poor Building Warehouse Poor Building 202 Engine Shop Fair to Poor Building 203 Machine Shop Fair to Poor Building 204 Power Plant Poor Stack Poor

8 BLDG 189 Smelter Office Opinion of Structural Condition Poor Recommended Structural Repairs Allowance for interior structural repairs Replace porch roof structures Repair and replace damaged masonry Repoint masonry Replace windows and doors Replace roof

9 Building 189 Recommended Repairs Replace porch roof structure Replace damaged and missing brick Repoint masonry mortar Replace doors and windows Replace roof system

10 BLDG 194 Change House Opinion of Structural Condition Fair to Poor Recommended Structural Repairs Allowance for potential structural repairs Repoint masonry mortar Replace metal siding Replace windows and doors Replace roofing

11 Building 194 Recommended Repairs Repoint masonry mortar Replace windows and doors Allowance included for potential structural framing repairs (framing not visible)

12 Building 194 Recommended Repairs Replace roofing

BLDG 201 Warehouse Opinion of Structural Condition Poor Recommended Structural Repairs Repair cracks in apron foundation wall Repair damaged

13 BLDG 201 Warehouse Opinion of Structural Condition Poor Recommended Structural Repairs Repair cracks in apron foundation wall Repair damaged masonry and replace lintel at south doorway Repair cracked and missing masonry Repoint masonry mortar Replace windows and doors Replace metal roofing

14 Building 201 Recommended Repairs Rebuild masonry wall and replace door lintel Repair cracked and missing masonry Repoint masonry mortar Replace windows and doors Replace metal roofing

15 BLDG 202 Engine Shop Opinion of Structural Condition Fair to Poor Recommended Structural Repairs Replace timber floor recess covers Demolish or reinforce attached weld shop Replace metal siding Replace windows and doors Replace metal roofing

16 Building 202 Recommended Repairs Replace floor recess covers Demolish weld shop building structure Replace metal siding Replace doors and gable openings

17 Building 202 Recommended Repairs Replace metal roofing

18 BLDG 203 Machine Shop Opinion of Structural Condition Fair to Poor Recommended Structural Repairs Replace/repair structural framing Repair damaged masonry Repoint masonry Replace windows and doors Replace metal roofing

19 Building 203 Recommended Repairs Replace missing or damaged brick Repoint masonry Replace doors and windows Replace metal roofing

20 Building 203 Recommended Repairs Interior, repair or replace steel framing

BLDG 204 Power Plant Opinion of Structural Condition Poor Recommended Structural Repairs Inject basement wall cracking Replace damaged or missing structural framing Demolish

21 BLDG 204 Power Plant Opinion of Structural Condition Poor Recommended Structural Repairs Inject basement wall cracking Replace damaged or missing structural framing Demolish existing elevated concrete floor and replace Allowance for steel framing repairs in basement area Repair damaged masonry Repoint masonry Replace windows and doors Replace metal roofing

22 Building 204 Recommended Repairs Injection crack repair of partially exposed concrete basement wall Replace damaged and/or missing steel framing

23 Building 204 Recommended Repairs Demolish and replace elevated concrete floor slab Replace damaged and/or missing brick

24 Building 204 Recommended Repairs Replace windows and doors Replace roof (roof framing to remain)

RAPID STRUCTURAL ASSESSMENT REPORT

RAPID STRUCTURAL ASSESSMENT REPORT Structure Type: SUPERSTRUCTURE Work Order: 5540 Facility Name: Pier 68 Warehouse FIN: 1680036 Building- Bldg. # 36 Asset Number: 1680-BLDG36 Facility Code: 3490 Asset Activity: STRUCTURE TWO YR Port Engineer: