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### Miami Project Execution

The Miami Smelter is an operating facility and is expected to continue operations through the execution of this project. As much of the work as possible will be completed while the plant is operating. However, some construction work will necessitate interr uptions in production and will have to occur during planned plant shutdowns. Currently the schedule for the main plant shutdowns is dictated by the frequency of Smelting Furnace relining. Other shutdown activities are scheduled around these relines. T he ca mpaigns between full relining tasks can range from 12 to 18 months in length, with an average campaign length of 1 4 months. In addition to full relining , the Miami Smelter schedule s mid

- campaign kettle repairs where only the kettle portion of the vessel is relined. The mid

- campaign kettle repairs typically occur halfway between full relines. A typical duration for a full reline i s 21 days , while a mid

- campaign kettle repair is 10 days

. Although the exact timing of plant shutdowns is difficult to predict, th e project has been developed on the smelter ’ s current shutdown plan. The current smelter shutdown plan is as follows:



###  September 2014

– Smelter Shutdown, 21 days



###  May 2015

– Mid Campaign Kettle Repair, 10 days



###  November 2015

– Smelter Shutdown, 21 days

– Fina l tie

- in of 2015 construction



###  June 2016

– Mid Campaign Kettle Repair, 10 days



###  March 2017

– Smelter Shutdown, 40 days

– Final tie

- in of 2016

- 2017 construction (normal shutdown length: 21 days) The majority of the construction that will occur in 2015 will be executed in advance of the November 2015 shutdown with final tie

- ins occurring during the planned November 2015 shutdown. The majority of the construction that will occur in 2016 and 2017 will be executed in advance of the planned March 2017 shutdo wn with final tie

- ins occurring during the March 2017 shutdown. Some early works will be completed ahead of the main construction for each phase. In addition, some activities will carry on after the main shutdown for each phase; this is p rimarily for demol ition and non

- critical work. The project schedule estimates a 40 day shutdown will be required in March of 2017, which is longer than the normal 21 day shutdown. A schedule outlining the construction timeline for each phase is shown below . The main planned smelter shutdowns have been indicated by a n ‘X’, with mid

- campaign kettle repairs designated by a n ‘ o ’.Page 2 of 3



### 2015 Construction Th e 2015 construction is deals with both preparatory work in advance of the expansion as well as reducing ambient SO 2 emissions. Th is w ork will be tied to the planned shutdown in November of 2015. As much work as possible will be completed in advance of the shutdown. The early works consists of a small amount of work to be completed during the planned shutdown in September 2014 as well as the Converter Mouth Cover installations. The work in September 2014 is required to relocate existing operating equipment to enable pre - shutdo wn construction to commence in mid

- 2015. The Converter Mouth Cover installations have been coordinated with planned converter rebuilds. The main scope of the 2015 construction includes:



###  Paddle Mixers and Conveyors

.



###  Converter Mouth Covers (4)

.



###  Vent Fume S crubber conversion to c austic

.



###  Centralized Caustic Receiving and Distribution S ystem

.



###  Consolidated Maintenance Shop (required primarily to facilitate construction of the Aisle Scrubber in Phase 2 ). 

### 2016 - 2017 Construction The majority of the project scope will be installed during the construction that will be completed leading up to and during a shutdown in March of 2017

. This shutdown will be longer than a typical smelter shutdown

– currently estimated at 40 days.Page 3 of 3

Some cr itical portions of th is work will be executed during the November 2015 shutdown . This work is referred to as the 2016

- 2017 construction early works. This work is preparatory and will assist with reducing the duration and congestion of the shutdown in March of 2017. Two elements identified for these early works include Smelting Furnace building structural steel modifications to facilitate the new furnace installation and Mold Barrel foundations for the replacement vessel. The main scope of the 2016

- 2017 con struction includes:

 Covered Concentrate Storage

.

 Smelting Furnace Crucible Replacement, Intense Cooling, Cooling Water System, Lance Seal and Feed Port Hood

.

 Waste Heat Boiler Modifications

.

 Converter Aisle Roofline Gas Collection

.

 Mold Barrel Replacement

.

 Anode Furnace Gas Handling System, Mouth and Slag Skim Bay Covers (6)

.

 Acid Plant Converter Bed, Final SO 3 Cooler, IAT Cooling Upgrades

.

 Tail Gas Scrubber conversion to c austic and Stack replacement

.

 Vent Fume Wet ESP’s and Stack replacement

.

 Aisle Scrubber and Aisle Scrubber Substation

.

 Smelter Oxygen Line Replacement

.