In the framework of the project entitled “Support to SHPP-relating Reforms Through the Dialogue of Public and RA Nature Protection Ministry for Sustainable Use of River Ecosystems” the expert group visited “Tigran Mets” SHPP. “Tigran Mets” SHPP is located in Vayots Dzor Region, in the administrative area of Yeghegis Community. The SHPP is constructed on the Yeghegis River (length – 47 km). It’s operated by “Rus&Har” LLC.
As a result of the monitoring, the expert group found out:
- The SHPP has been operating since 2015.
- According to the project, the static pressure of the SHPP is 116 m, according to the certificate issued by the Public Services Regulatory Committee on 1 January 2016 and the project, the estimated pressure of the SHPP is 95.9 m. According to the project, the estimated yield used by the SHPP is 3.2 and 5.18 m3/s and the PSRC certificate says it’s 3.2 m3/s. According to the the project, the projected capacity is 6046 kW in the first stage and 2381 kW in the second stage and according to the PSRC certificate, it’s 2381 kW. According to the PSRC, as of 01.01.2016 the factual useful delivery of the electricity is 10.1 million kWh, the estimated production of the SHPP is 9.15 million kWh, according to the project, the estiated production was planned 10.1 million kWh for the first stage and 7.0 million kWh for the second stage, duration of license - 129.04.2015-29.04.2030, water usage permit - 01.04.2014-01.08.2014.
- The water intake and water discharge coordinates mentioned in the water usage don’t comply with the real coordinates.
- The length of the concrete dam is 20 m and its height is 5 m. There is a sand trap in the right side of the dam and a fish passway in the left part. The project plans to have a dam of 8.6 m long and 2.6 m high.
- There is a concrete fish passway in the SHPP head section around 26 m long, 0.7 meters wide and 1.8 meters high and along its length there are 18 structures resembling concrete arrows. The height of the fish passway is 85 cm higher than the riverbed. At the moment of observation the fish passway was completely blocked with wooden logs. Such structure of the fish passway in the head section, as well as almost complete dryness of the riverbed show it can’t ensure the natural migration of the fish in the river.
- There is a table-like garbage-collecting net, and the distance between its bars is 4.5-6.0 cm. Such distance between the bars can’t prevent that the fish up to 16 cm don’t appear in the pressure pipeline.
- You can meet the following fish species in the Yeghegis River, where SHPP head section is constructed: brown trout, Kura barbell, South Caucasus Sprilin, Sevan Khramulya (red-listed in Armenia). Rainbow trout may penetrate into the river from the fish farms located on the banks of the Yeghegis River.
- The lnght of the both pipelines of the project is 2691 m, its diameter is 1200 mm and 1400 mm.
- Percentage correlation of aggregate length of SHPP derivation pipelines (24188 meters) of “Yeghegis 1” SHPP (the length of the derivation pipeline is 4000 meters, according to the certificate issued by the Public Services Regulatory Committee on 1 January 2015), “Yeghegnadzor” SHPP (according to the project, it’s length is 3250m, 54m), “Yeghegnadzor SHPP 1” SHPP (the length of the derivation pipeline is 2650 meters, according to the project), “Yeghegis 3” (the length of the derivation pipeline is 931.37 meters, according to the certificate issued by the Public Services Regulatory Committee on 1 January 2015), “Yeghegis 2” SHPP (the length of the derivation pipeline is 2138 meters, according to the project), “Yegheg” SHPP (the length of the derivation pipeline is 1924 meters, according to the project), “Goghtanik” SHPP (the length of the derivation pipeline is 1400 meters, according to the project), “Yeghegis” SHPP (the length of the derivation pipeline is 2450 meters), “Tigran Mets” SHPP (the length of the derivation pipeline is 2691 meters), “Khachi Qar” SHPP (the length of the derivation pipeline is 2240 meters) with the length of Yeghegis River makes up 51.46 %.
- The following SHPPs are planned to be constructed on the Yeghegis River: “Alnars” SHPP - “Alnars” LLC developer (according to the PSRC certificate, the length of the pipeline is 2300 meters), “Yeghegnut” SHPP – “VTV Energy” developer (according to the PSRC certificate, the length of the pipeline is 2665 meters), “Elis” SHPP – “Elis HPP” LLC developer (according to the PSRC certificate, the SHPP will be constructed on the Yeghegis and Soghanlu Rivers, the length of the pipelines is 2360,0 and 2288,0 meters).
- The station area is open and a tree planting has been carried out.
- The transformer substation is fenced.
- The construction water usage permit of the SHPP doesn’t mention any data on the water intake and environmental flow. The project plans to have an environmental flow of 0.49 cum/s.
- There are 3 aggregates of local “Khorda” production installed in the station with total 3100 kW capacity and at the moment of observation only two were operating with 1370 kW capacity.
- The automated management and recording of the environmental flow is not ensured.
- There is no water-meter sealed by a relevant environmental body in the water intake.
- The nearby specially protected area of nature is “Yeghegnadzor” reserve, the location of which is the Yeghegis river basin, a right-side tributary to the Arpa river in Vayots Dzor Region 1200-2800 m above sea level.
- To find out the reasons for the incompliance of the SHPP coordinates and to correct them.
- To ensure automatic management of environmental flow in the head section, installation of water-measuring devices and online control.
- To entirely reconstruct the fish passway to ensure the natural migration of the fish. Before this, the wooden construction blocking the entrance of the fish passway shall be removed. The same is true about the da, which completely blocks the riverbed generating an artificial lake. The use of the dam may be refused and to carry out the water intake in another way without blocking the riverbed.
The material was developed in the frames of “Supporting reforms in the sector of small hydro power plants through enabling a dialogue between civil society and the Ministry of Nature Protection for sustainable use of river ecosystems” supported by UNDP/GEF Small Grants Programme".
15:20 April 18, 2016