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Public Disclosure Authorized Public Disclosure Authorized Public Disclosure Authorized Public Disclosure Authorized Azerbaijan: Power Transmission Project E1090 Transmission Lines Rehabilitation sub-projects v. 1 ENVIRONMENTAL MANAGEMENT PLAN I 2nd APSHERON 500 kV TRANSMISSION LINE A. PROJECT DESCRIPTION – 2nd APSHERON 500 KV TRANSMISSION LINE The Azerbaijan Government has applied for funding from the International Bank for Reconstruction and Development (the World Bank) for a project to develop transmission system control and to rehabilitate power transmission facilities. Some of the funds are planned used for investments in this transmission line. The second Apsheron 500 kV line is the main transmission line connecting the primary generation plant Azgres located in the western side of the country to a 1 x 800 MVA 500/220 kV autotransformer in the Apsheron 500/330/220 kV substation located in the Baku load center area. It is a single circuit line 250 km in length, using 750 towers equipped with 3 x ACSR-330 / phase conductors. The line was put in service in 1989. It is designed to carry a load of 2250 Amps and is loaded with 925 Amps (Maximum loading capacity, considering the receiving end configuration). The transmission line was designed and constructed with long spans between the towers. Frequently, “tangent-suspension” type (∏) towers in those long spans overturn and collapse. The routing of the line passes through relatively low-lying flat sites that have an aggressive ground (saline and highly corrosive). U-shaped bolts fixing the towers to the footings have become severely corroded, break down, and result in a forced outage of the line. Conductor spacers are worn-out, are broken, and can result in faults caused by contact. Failure in this line, or in the single transformer at the receiving end, would necessitate transmitting its load mainly on the first Apsheron 300 kV line, again limited by the single 400 MVA transformer at the receiving end. Load shedding measures will have to be implemented in case of such failures. The above is the cause for forced and frequent unforced outages. Forced outages during peak load conditions would entail shedding a load amounting to approximately 400 MW for the duration of the outage. Necessary Rehabilitation / Upgrading Works: Replacement of 10 (∏) type towers (Ref. number 353, 423, 426, 561, 562, 598, 657, 683 and 687) by “turning” type (Ā) towers for increased stability. Installation of two new (∏) type towers at excessively long span areas. Replacement of 600 U-shaped corroded fixation bolts. Replacement of corresponding damaged tower footings (corroded foundation re-bars). Replacement of broken conductor spacers in the span between towers number 520 up to 713 (62 km length). Installing new insulators and line armatures Installation of new grounding rods Installation of new vibration dampers The cost for implementing the above mentioned works is estimated to be less than US$1 million. Apsheron 1 and 2 TL are considered to pass through the following terrain: - Mountain relief, length of line - 60 km - Hilly relief, length of line - 90 km - Flat relief, length of line - 92,8 km (and Apsheron 2, 100.54 km) In the immediate vicinity of Apsheron Substation, the lines remain in a valley out of view of the main road corridor for some 20 km before running parallel to the M4 road to the town of Maraza. Thereafter the lines cross a plateau (generally at levels of 700-1000m above sea level) and the valley of the River Pusoal before reaching the Agsu scarp. Access in these areas is not restricted by development, but the relative isolation of the lines from surfaced roads is a problem. In some areas heavy clays make access difficult and on some of the higher sections snow and ice also restrict operations in winter. The vegetation in this area is almost exclusively grassland. There is no evidence of forest or other complex ecosystems being directly affected by the projects. However, the lines traverse lands in close proximity to a number of sites of potential conservation value. It is also possible that some endangered or threatened animal species could be affected. Land uses are generally restricted to grazing. 2 From Agsu to Mingacevir the lines run off the valley floor, typically on the lower and mid slopes of the scarp. Access is difficult in these areas because of soil types (often heavy clays) and in winter snow and ice. Lands traversed are typically used for low intensity grazing. Erosion is a concern along the entire length of the lines, in two contexts. There are a number of extremely vulnerable, ‘badland,’ areas, and there are also areas where access tracks (not necessarily related to Azerenerji operations) running under and alongside lines have led to local severe erosion problems. Access will be required for 20 continuous kilometers of line. There is a possible risk of erosion from access and indirect damage from erosion and sedimentation. No data is available with respect to possible contamination along the right-of-way or the likely presence of heritage/ cultural assets. B. SCHEDULE – 2nd APSHERON 500 KV TRANSMISSION LINE Starting date Ending date MITIGATION ACTIVITIES Construction – preliminary estimate, March 1, 2006 October 1, 2006 depending on timing of World Bank loan Operation – preliminary estimate October 1, 2006 MONITORING ACTIVITIES Construction March 1, 2006 October 1, 2006 Operation October 1, 2006 Note: The Starting and Ending Dates shown hereinafter are conditional ones. Specific dates will be determined during evaluation of bidding documents. Sections C through G of this Environmental Management Plan (EMP) are identical for the transmission line rehabilitation subprojects of the Azerbaijan Power Transmission Project. 3 II 1st APSHERON 330 kV TRANSMISSION LINE A. PROJECT DESCRIPTION – 1st APSHERON 330 KV TRANSMISSION LINE The Azerbaijan Government has applied for funding from the International Bank for Reconstruction and Development (the World Bank) for a project to develop transmission system control and to rehabilitate power transmission facilities. Some of the funds are planned used for investments in this transmission line. The first Apsheron line is a 500 kV rated line, operated at 330 kV. Both this line and the 2nd Apsheron line are considered the most important two transmission lines in the grid. The 1st Apsheron transmission line connects the primary generation plant Az Dres located in the western side of the country to a x 400 MVA 330/220 kV autotransformer in the Apsheron 500/330/220 kV substation located in the Baku load center area. It is a single line 242 km in length, using 699 towers equipped with 3 x ACSR-330 / phase conductors. The line was put in service in 1986. It is designed to carry a load of 2235 Amps and is loaded with 700 Amps (Maximum loading capacity, considering the receiving end configuration). The transmission line was designed and constructed with long spans between the towers. Frequently, (∏) type suspension towers in those long spans over-turn and collapse. The routing of the line passes through relatively low-lying flat sites that have an aggressive ground (saline and highly corrosive). U-shaped bolts fixing the towers to the footing have become severely corroded. They break down, forcing an outage of the line. Conductor spacers are worn-out and are broken. Failure in this line, or in the single transformer at the receiving end, would necessitate transmitting its load mainly on the second Apsheron 500 kV line, limited by the single 800 MVA transformer at the receiving end. Load shedding measures would also have to be implemented The above is the cause for forced and frequent unforced outages. Forced outages during peak load conditions would entail shedding a load amounting to approximately 200 MW for the duration of the outage. Necessary Rehabilitation / Upgrading Works: Replacement of 7 (∏) type towers (Ref. number 421, 448, 471, 495, 551 and 584) by (Ā) type towers for increased stability. Installation of one new (∏) type towers at excessively long span areas. 4 Replacement of 1200 U-shaped corroded fixation bolts. Replacement of corresponding damaged tower footings (corroded foundation bolts). Replacement of broken conductor spacers in the span between towers number 520 up to 699 (60 km length). Installing new insulators and line armatures Installation of new grounding rods Installation of new vibration dampers. The cost for implementing the above mentioned works is estimated to be less than US$1.5 million. Apsheron 1 and 2 TL are considered to pass through the following terrain: - Mountain relief, length of line - 60 km - Hilly relief, length of line - 90 km - Flat relief, length of line - 92,8 km (and Apsheron 2, 100.54 km) In the immediate vicinity of Apsheron Substation, the lines remain in a valley out of view of the main road corridor for some 20 km before running parallel to the M4 road to the town of Maraza. Thereafter the lines cross a plateau (generally at levels of 700-1000m above sea level) and the valley of the River Pusoal before reaching the Agsu scarp. Access in these areas is not restricted by development, but the relative isolation of the lines from surfaced roads is a problem. In some areas heavy clays make access difficult and on some of the higher sections snow and ice also restrict operations in winter. The vegetation in this area is almost exclusively grassland. There is no evidence of forest or other complex ecosystems being directly affected by the projects. However, the lines traverse lands in close proximity to a number of sites of potential conservation value. It is also possible that some endangered or threatened animal species could be affected. Land uses are generally restricted to grazing. From Agsu to Mingacevir the lines run off the valley floor, typically on the lower and mid slopes of the scarp.