Oyu Tolgoi Mining and Processing EIA

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Oyu Tolgoi ProjectMining and Processing EIA6.2 Potential Impacts to vegetation from the Oyu Tolgoi ProjectThe outcomes of risk assessment identified the following positive and negative impacts on flora andvegetation from the development and operation of the ProjectPositive impacts include:• The fencing of the Project Area will exclude grazing animals from substantial areas ofvegetation that will not be disturbed from Project activities. This provides the opportunity toestablish natural vegetation that is not subjected to grazing pressure and will allow the studyand comparison of vegetation condition with unfenced areas.• The diversification of income in the region surrounding Oyu Tolgoi from increasedemployment and secondary industries and services may reduce reliance on livestock as aprimary source of income. Lower herd numbers will reduce grazing pressure and have apositive impact on the condition of regional vegetation.• The long term monitoring of flora and vegetation of the area during the life of the miningproject will provide useful regional scientific data in an area that has been rarely studied. Thisdata will assist in research to combat land degradation and occurrence of dust storms.Negative impacts are:Project development within the licence area will remove approximately 915.1 ha of vegetationcover. Permanent loss of natural vegetation will occur for the development of the open pits,processing plant and relating constructions and tailings storage facility. Temporary disturbancewill occur from roads, some buildings, airstrip and other infrastructure that will be removed andrestored at mine closure. Table 6.4 and 6.5 below provides the areas to be affected and vegetationtypes disturbed by project development.Prepared by ECO-TRADE LLC. Environmental Consultants, MongoliaClient: Ivanhoe Mines Mongolia Inc (IMMI) XXKPart II. Chapter 6. Page 10
Oyu Tolgoi ProjectMining and Processing EIATable 6.5 Area of vegetation disturbed from project developmentID Project constructions Impact type Affect area, ha1 Waste rock dumps Suppression 1364,3592 Tailings storage facility Remove 1226,2823 Hugo area Remove and degradation 690,8764 Open pit Remove 255,0545 OT village Remove 82,5906 Backfill stockpile Suppression 7.1917 Spoil stockpile Suppression 4.0659 Clay stockpile Suppression 2.58210 truck shop Remove and degradation 28.61111 coal &ash storage area Suppression 3.97412 central boiler facility Remove 0.60913 core storage facility Remove 31.09414 landfill Remove and degradation 9.86015 top soil stockpile Suppression 0.53616 storm water collection pond Remove 0.60617 raw water pond Remove 12.00218 tailings pump house Remove 0.35019 future operation warehouse Remove 3.93020 warehouse Remove 4.08721 laydown yard Remove 3.88222 bonded customs yard Remove 5.68623 temporary office Remove and degradation 1.55624 mine magazine Remove 6.88425 fueling station Remove 0.1526 gate house Remove 1.39727 proposed rail yard Remove 9.847Total removal area 915.103Total suppression area 1383.426Total degradation area 730.903Source: AMEC IDP of OT Project, and vegetation mapcompleted by J.Sanjid and P.Janchivdorj,2005• Approximately 450-470 ha vegetation cover will be impacted by road and infrastructure in thesurrounding area.• Potential impacts on surrounding vegetation from deposition of wind blown dust. Dustemissions from project activities, including vehicle movements, stockpiles and waste disposalmay deposit on vegetation foliage and result in vegetation deaths in the long term.• Potential impact from groundwater drawdown in the Project Area on groundwater dependentvegetation. Changes to local hydrogeology is likely to impact deep rooted perennial speciesthat are reliant on groundwater for survival. The area of potential groundwater drawdown isexpected to be up to 5 km from the mine pits after 10 years of mining (Aquiterra, MineDewatering Survey Report, 2004). This has the potential to impact siberian elm trees locatedin the north east side of Project Area as shown in Figure 2.6.Prepared by ECO-TRADE LLC. Environmental Consultants, MongoliaClient: Ivanhoe Mines Mongolia Inc (IMMI) XXKPart II. Chapter 6. Page 11
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Oyu Tolgoi Mining and Processing EIA

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