Part A - EIA 400 kV OHTL Stp - Ð¼ÐµÐ¿ÑÐ¾ Ð°.Ð´.

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Environmental Impact Assessment Study for 400 kV OHL SS Stip – Macedonian-Serbian Border• Pipe under pressure, with a reservoir, from "Pavlev Dol" to the vinyards near thelocation "Kampur", between RP10 and RP11• Non-captured spring (Q – 0.3 l.s) in “Mugrashki Dol”Stream, between RP11 and RP12• Group of dug wells (depth = 8 - 10 metres) in village Kosmatec, after RP12• Temporary marsh near “Novoselski greben”, between RP12 and RP13• Shallow dug well (depth = 4.2 metres) near the location “Orlovac”, between RP12 andRP13• Temporary marsh and group of dug wells (depth = 3.5 – 4.5 metres) near VillageChukinska Maala, between RP13 and RP14• Captured spring (Q – unknown), on the left side of the route, bellow the location“Zebrnjak”, near RP14• Group of dug and drilled wells (depth = 2 -3 metres) and 2 reservoirs in Village AdjinaMaala, between RP14 and RP15• Group of shallow dug wells (depth = 2 -3 metres) and a reservoir in Village Jarebichari,between RP14 and RP15• Group of shallow dug wells (depth = 3 - 5 metres) and a reservoir in Village StaroNagorichane, between RP14 and RP15• Subterranean gravity pipeline for water supply, from Village Nikuljane to VillageJarebichari, between RP14 and RP15• Captured karst spring (tap) (Q = 0.1 – 10 l/s) and drilled well for exploitation (52metres, Q ~ 10 l/s) in Village Nikuljane, between RP14 and RP15• Non-captured temporary spring (Q – unknown) near RP15• Non-captured spring (Q – 0.3 l.s) in Village Sejdina Maala, between RP15 and RP16.59
Environmental Impact Assessment Study for 400 kV OHL SS Stip – Macedonian-Serbian Border3.3.3 Engineering - Geological Characteristics of the AreaThe terrain along the route of the transmission line, from engineering - geological aspectconsists of (i) non coherent, (ii) poorly coherent and (iii) highly coherent rock masses.(i)Non Coherent Rock MassesIn this group of loosely coherent rock masses along the route of the transmission line, wecan emphasize the following:• Lake sediments (j). These sediments are rare along the route of the transmission line,or more precisely, they occur only near the reference point RP12. They consist of big,well-rounded boulders of quartz and quartzite, and various shales mixed with sand andsilt. These are loose, non-compacted and porous materials.• Marsh sediments (b). They are made of organogenic fine grain silts. They are presentin the valleys of temporary flows Boshkov Dol and Drenov Dol, south of RP10. Theyfeature with medium to very good compaction. They can be unfavourable ground forfoundation of heavy constructions.• Alluvial sediments (al). They can be found along the Rivers Luka and Pchinja, i.e. atthe RP11 and RP13. They consist of large-grain cobbles and gravel The material ismedium to well rounded and well compacted and sorted. These sediments possesshigh filtration characteristics and are quite porous. The thickness of these sediments isestimated at more than 3 metres.• Terrace sediments (t 1 ). They are noticed along the valley of River Pchinja, around RP13 hanging from a height of 5-10 metres above the river level. They consist of cobblesand sands, well rounded and weak to medium sorted.• Proluvial sediments (pr). They cover almost the entire terrain between reference pointRP3 and RP7. The proluvium characterizes with large grain cobbles and stones, notrounded or partially rounded, weakly sorted and mixed with clay and sand materialsweakly to medium compacted. The porosity is intergranular due to the larger coarsegrains. Compared to deluvial material, they are more porous. The thickness of thesesediments reaches up to 10 m.• Deluvial sediments (b). They represent decomposed and friable layer consisting mostlyof paleogenic sediments. From engineering geological aspect they are not wellrounded and sorted. Their thickness is quite variable, between 2-10 metres.• Pliocene sediments (Pl 3 ?). They spread along the northern part of the route of thetransmission line, from RP13 towards RP14 and approximately 8 km to the north, nearVillage Nikuljane. They consist of sands, clays and big masses of rubble sedimentsthat alternate vertically.(ii)Poorly Coherent Rock MassesPoorly coherent rock masses are the ones that consist of particles smaller than 0.002 mm.The most typical representatives are clays and marls. They are very frequent along the route,but most visible are in the Pliocene sediments, in sand and clay series (Pl 3 ).From engineering geological aspect, they represent an environment where variousappearances may occur, such as: swelling, consolidated depressions, supplanting, draggingdown (due to the terrain morphology where they occur, this is excluded), exceeding thecarriage capacity, etc. Very often, there is a need for improvement of their characteristics.60
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