AquaHydro Ipari

IPARI HPP On the river Ipari PRE-FEASIBILITY STUDY

OF THE IPARI RIVER BASIN

AQUAHYDRO LTD

The information presented in this report is confidential

IPARI HPP

ON THE RIVER IPARI

PRE-FEASIIBILITY STUDY

OF THE IPARI HPP

AQUAHYDRO LTD

შპს „აკვაჰიდრო“ შპს „კომპანიის სახელი“

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TABLE OF CONTENTS

Contents ......................................................................................................................................... 2

1. Object location and basic parameters .................................................................................... 3

2. Topographic map of potential course object territory .......................................................... 5

3. Brief geological data of object location, geological map ...................................................... 6

4. Seismic data of the object location and the map ................................................................... 8

5. Hydrological and meteorological data ................................................................................. 12

6. Energy calculations and hydraulics ..................................................................................... 18

7. Infrastructure ........................................................................................................................ 21

8. Grid Connection ................................................................................................................... 22

9. Estimated calculation ........................................................................................................... 24

10. Economic and Financial Analysis .................................................................................... 24

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1. OBJECT LOCATION AND BASIC PARAMETERS

Ipari HPP construction is planned in the region of Samegrelo, Upper-Svaneti on the river

Ipari. The Estimated installed capacity of the HPP is 3.2 MW, the head race benchmark in

the upstream is 1090 m. From the head the water flows to the 1550 m long penstock,

downstream water benchmark is 903 m.

Project location map.

The river Ipari flows from the northern slope of the Chishla ridge on the 2800 meters high

and joins the River Inguri from the left side, at the Ipari village on the 770 m benchmark.

The length of the River is 12 km, full drop – 2030 m, Average slope - 170 ‰, catchment area

- 32 km², average height - 1940 m. 45 medium and small tributaries run into the river.

Network frequency of river basin is 0.80 km / km².

The basin of the river has an asymmetrical shape, which is bordered by the river Khelra from

the east and from the west by the river Mukhashura catchment basins. The Basin length is 14

km, the average width - 4 km.

The surface of the basin is characterized by mountainous terrain. It is highly fragmented by

the erosion deep gorges of the tributaries, which sides are aslope enough, some sections are

steep. At the watershed ridges the heights of the mountains change within the 1250-3020 m.

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By the tectonic terms the catchment area is the part of the folded zone of Gagra-Java and

includes Khaishi and north subzones of the porphyritic Juri. The border between subzones

goes on the deep fault of the Idliani-Rckhmeuli which crosses the study space by the

direction of the geographical parallel.

The mojor part of the catchment basin of the river Khelra is covered by of the herbal

vegetation. Mainly here is the mixed forest _ beech, oak, fir, chestnut, hornbeam. The forest

is sparse in the downstream. The Woodness consists 80%.

The river Ipari is fed by snow, rain and ground water. Its water regime is characterized by

spring-summer floods, summer-autumn flooded conditions and relatively stable shallow

water-resistance of winter.

Project includes the following components:

Low threshold dam, jigger headlamps and fish ladder;

Closed grid of desilter camera, fish-protection grid;

Penstock (1550 m);

Power knot, equipped by two horizontal axis Pelton type turbines;

Access roads.

The main technical parameters of the IPARI HPP are:

Gross head - 187 m;

Type of dam - low threshold dam, height - 3 m, width - 30 m;

Metal penstock, length - 1550 m, diameter - 1,2 m;

Number of turbines 2, type - Pelton - horizontal axis - 2 water jets;

Maximum power - 3.2 MW;

Average output - 14.2 GWh;

Grid connection: with the 35 kV tyre the Ipari HPP will be connected with the

existed 35 kV line voltage of “Khudoni-Mestia“;

Cost - 4.4 million US dollars.

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2. TOPOGRAPHIC MAP OF POTENTIAL COURSE OBJECT

TERRITORY

Tipography of the object location is presented below on 1:25’000 scale map:

Displacement area of the objects 1:25’000 map and plan.

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3. BRIEF GEOLOGICAL DATA OF OBJECT LOCATION,

GEOLOGICAL MAP

According to the tectonic zoning, the study area is included in the south slope folded system of

Lias schists of the Greater Caucasus, Bajocian volcanogenic series, upper Jura and cretaceous

carbonate in Gagra-Java spreading zone and in particular includes lower and upper Muashi

subset formations of the lower Jurassic period of Khaishi subzone.

According to the geomorphological point of view, the gorge of the river Ipari is the part of the

erosian-denudational mountainous terrain that is developed on the substrate of the lower

Jurassic period of the Muashi subset formations with the ancient and modern glacier tracks.

The slopes of the Ipari river gorge is represented by the lower Jurassic period lower subset

formations of Muashi: dark gray grapholite and sandy shales with the rare layers of quartz sand

(J12ms1) and Muashi upper subset and grapholite shales alternation with the rare mid layers of

the quartz sandstones (J12ms2); Rocks are cliffy and semi cliffy, characterized by gravelly

grained and gravelly clay with the residual soil.

In the lower gorge of the river Ipari, at the mouth of the two large tributaries, where the

future dam will be built, in the river-bed and on the both banks glacial-river sedimentation

is spread that is represented by the boulders, nodules, pebbles and sand deposits.

At the joining area of the river Inguri, at the the building deployment location of the future HPP

deluvial-proluvial formations are marked that is represented by gravelly grained bottom and

gravelly clay filler.

At the territory of the hydropower complex layout area the tectonic faults and the modern

geodynamic processes (landslides, mud-slides) are not observed, if we don’t take into

consideration mud-slides hazardous areas that is fixed at the outfall of the river (from the fund

resources) the study of them is necessary on the next stage of the additional works.

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4. SEISMIC DATA OF THE OBJECT LOCATION AND THE

MAP

Georgia and the whole Caucasus region situate within a wide deformation zone between the

Black sea and the Caspian sea, which is a part of the Alps-Himalayan collision belt. The

movement of the Arabian plate to the north towards the Eurasian plate determine the main

tectonic picture of the region. Continental collision caused the wrinkling and uplifted the

main mountain range of the Greater Caucasus, which is currently the tallest mountain

system segment in the western Alps-Himalayan Belt. Here two continental plates collision is

marked: Arabian Plate moves to the north and collides with the Eurasian plate. The collision

of plates generates two types of deterioration: types of displacement fault in Iran and Turkey

and overthrust faults in Caucasus.

Due to the general seismicity of the Caucasus in the 80-90s, increasing of seismic activity was

observed, which indicators are the powerful earthquakes that happend one after another:

Spitak earthquake in Armenia in 1988 M = 7.0, Racha earthquake in 1991 M = 7.0, Barisakho

earthquake in Georgia in 1992 M = 6.5, Erzincan earthquake in Turkey in 1993 M = 7.3.

Active faults are mostly located on the borders of tectonic blocks. Longitudinal and

latitudinal direction faults of the Caucasus should be noted. The number intrazonal fault has

the same direction. Most of these faults are intratelluric.

According to the quality of technical lability the territory of Georgia is divided in five major

geotechnical units: I- anticli-norium of the mountain range of the Caucasus, II- folded

system of the southern slope of the Caucasus, III- the belt of Georgia (Mtatusheti), IV- folded

system of Adjara-Trialeti and V- the belt of Artvis-Bologna (Armenia), see map.

The catchment basin of the river Ipari is located II _ in the southern slope of the Caucasus

folded system II4 porphyritic Juri north subzone of Gagra-Java which represented

geosincline during the whole Mesozoic and lower Paleogene. It is built with the huge thick

sediments and partially with the volcanogenic formations. The intense wrinkling and south

leaning is characterized for the entire system. Here is developed strongly compressed

isoclinic or asymmetric common Caucasian direction of traction linear wrinkles.

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Seismic data analysis shows that it’s an average seismic region. The magnitude of the strong

earthquakes which are fixed here is equal to 7, whereas micro seismic intensity is 9 Ball

(MSK scale). Reiteration period of the strong earthquakes is 103-104 years type.

Variety of seismic catalogs has been used for the purpose of seismic analysis: the Caucasus

earthquake catalog which was existed in the seismic monitoring center; special catalog for

Caucasus that was created within the Assessment Program for the Global Seismic Hazard and

the catalog for the strong earthquakes.

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The study area (central part of the Caucasus) is one of the most seismically active region in

Georgia. On the map you can see the epicenter map of the existed historical earthquakes that

are fixed in the catalog. (Only medium and strong earthquakes is contained M>3).

In the period of instrumental observations the region was distinguished with the high

seismic activity particularly epicenter zone of Racha earthquake in 1991 is noteworthy.

Racha earthquake was the largest seismic event. The magnitude of the earthquake is M = 7.0,

whereas the intensity in the epicenter was 9 Ball. The epicenter of the earthquake was

located in the mountainous villages of Racha and Imereti.

Racha earthquake was related to the active fault of Gagra-Java. The earthquake epicenter is

still seismically active. The measurement data show that in this region the crust movement

of the earth is quite intense, about 4-5 mm per year. Intermountain area has the same speed

towards the central part of the Caucasus folded system. This modern data are in a good

agreement with the geological and seismic researches.

On the presented map the seismic zoning of Georgia is shown. It was prepared by the

Institute of Geophysics of Georgia and according to the map the Ipari HPP locates in the

earthquake zone equal to 9 Ball.

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5. HYDROLOGICAL AND METEOROLOGICAL DATA

5.1. Hydrological data

By hydrological point of view, the river Ipari has not studied. That’s why its average annual

flow values is determined by the method given in the hydrological reference book by name

”Surface water resources of the USSR“ Volume IX, Issue I, West Transcaucasia ".

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Ipari river gorge. Meeting of the Inguri and Ipari rivers.

However, in addition, from the nearby checkpoint stations the average value of multi year

water flow has been calculated, which is equal to the values which are given below, so the

below-described method was taken into consideration.

According to the above mantioned method, for the study river basin location district

between the average heights of the pond and flows module from the influence curve,

adequate of the average height, the average annual flow of the river basin module is

determined which in our case is equal from 45.0 l / sec km². From here, the average flow of

the river Natseshari in the main building section of the presented HPP project section is

equal to:

3.11000

0,453.29

1000

./ 22

0

kmsekMlFkm

Q m3/s

In the same hydrological reference book, according to the intra-annual distribution of the

hydrologically unstudied rivers, percentage distribution between months is estimated

according to the average heights of the basin. The obtained results are given in the table

below. The ecological flow of the river (which is equal to 10% of the average annual flow of

the river in the water intake section) and the amount of water that is supplied for the HPP is

given, the leaving the environmental flows is also forseen.

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Expenditure I II III IV V VI VII VIII IX X XI XII Year

50 % provision (average hydrous)

Av. monthly

On the head 0.4 0.4 0.6 1.5 2.5 2.9 2.5 1.7 1.2 0.8 0.7 0.5 1.3

Environmental

Flows 0.13 0.13 0.13 0.13 0.13 0.13 0.13 0.13 0.13 0.13 0.13 0.13 0.13

Taken by HPP 0.3 0.3 0.5 1.4 2.4 2.8 2.4 1.5 1.0 0.7 0.5 0.4 0.3

River Ipari intra-annual distribution of the average annual costs of accounting provision in the project section.

Average annual flow hydrograph of the river Ipari in the project section.

Average monthly and annual costs of the river Ipari, which are given in the water amount

box that should be taken by project HPP intake is accepted as the calculating values.

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Watershed map.

5.1. Meteorological data

The basin of the river Ipari belongs to the river Inguri basin that locates in the climatic

region of the western Caucasus, where humid subtropical climate is dominated. On the

thermal regime of the west Caucasus affects the Black Sea and its influence is weakened in

the basin of the river Inguri.

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One of the main feature of the climat conditions is the air temperature, according to the

multi-year meteorological observations of Khaishi that locates near the project power plant the

average monthly, annual and extreme values of temperature is given in the table below:

The average monthly, annual and extreme temperature of the air.

As the represented table shows, the hottest months in the region are July and August,

whereas the coldest is - January.

The annual sum of precipitation in the region varies in the range of 1421 mm. The annual

precipitation is almost equally distributed between months. The following table shows the

average monthly and annual number of rainfall according the same observation data of the

Khaishi meteorological station.

The average monthly and annual sum rainfall in mm

According to Khaishi multi-year meteorological observation data, the snow coverage

commonly appears 6.XII and disappear 21.III. At the same time, the average decade height of

snow cover by the same meteorological station data amount 48 cm and the maximum

average decade height is 135 cm.

The emergence and disappearance dates of the snow cover, according the same multi-

meteorological station observation data is presented on the table below.

Meteorological station

Number of

snowy days

Emergence date of snow cover Disappearance date of snow cover

Number Average Early Late L Average Early Late

Khaishi 62 6.XII. 25.X 24.I 21.III. 21.II. 24.IV

Emergence and disappearance dates of the snow cover.

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Snow cover maximum decade heights of different providing values according to Khaishi

meteorological station multi-decade observation is shown in the table below:

Snow cover different provision values of maximum decade heights (cm).

Annual procession of the air humidity practically coincides with the annual course of the air

temperature. High rates of the air humidity deficit is fixed in the summer months, whereas

the minimum - in winter. Air humidity characteristics, according to multi-year observation

data of the same meteorological station are presented in the following table:

Met.

station

Humidity

I II III IV V VI VII VII

I

IX X XI XII Year

Khaishi

Absolut. 5.2 5.4 6.2 8.4 12 15.4 18.1 17.8 14.4 10.5 7.7 5.8 10.6

Percent % 81 79 74 70 71 73 74 74 78 81 80 82 76

Deficit.

1.2 1.5 2.7 5 6.2 6.9 7.4 7.7 5.3 2.9 1.9 1.3 4.2

Air humidity.

All directions of wind blow in the region. But the prevailing are the east and the west

directional winds which is due to the direction of the river Inguri. The following table shows

the wind directions and the number of stills according to the multi-year observations of the

same meteorological station.


Provision

P %

95 90 75 50 25 10 5

Khaishi 9 15 29 44 64 83 107

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meteorological

station

NN NNN.E E S.E S S.W W NN.WN Still

Khaishi 3 11 54 1 0 2 23 6 52

Wind directions and annual number of stills in %

The average annual wind speed is 2.3 m / sec. During the warm period of year the average

monthly speed is maximum, whereas the minimum speed is fixed in winter. The following

table shows the average monthly and annual rates of wind:

Monthly and annual average wind speed in m / s

The following table shows maximum speeds of the different repetition according to the multi-

year observations of the same meteorological station.


Maximum wind speed (m / s) available one-time

1 Year 5 Years 10 Years 15 Years 20 Years

Khaishi 14 16 17 18 19

The maximum wind speeds in m/s.

6. ENERGY CALCULATIONS AND HYDRAULICS

The energy report is based on average monthly data. During the energy report the following

things are foreseen: sanitary water dam out, losses in the hydrotechnical scheme, the

effectiveness of aggregates and the number of working aggregates, the efficiency of generator

and other parts.

Energy calculation of the Ipari HPP that is based on the multiannual average monthly expenses is listed in the following table:

Monthly capacities of the Ipari HPP.

Monthly output of the Ipari HPP.

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7. INFRASTRUCTURE

Construction district is 60 km far from Mestia. From Zugdidi - 80 km, while from Tbilisi - 430

km. Within the project area of the HPP approximately 4000 m road rehabilitation works

should be implemented, see the map.

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The road in the gorge of river Ipari.

8. GRID CONNECTION

Ipari HPP will connect with 35 kV belt with the existed 35 kV voltage line “Khudoni-

Mestia“ transmission line. 1450 m length new 35 kV transmission line will be built, see the

following topographic map:

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IPARI HPP

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9. ESTIMATED CALCULATION

Estimated calculations of the project is given in the table below:

Consequently, total investment of the project amounts 4.4 million US dollars.

10. ECONOMIC AND FINANCIAL ANALYSIS

As a result of the project estimation, the amount of investment costs 4.4 million US dollars,

which is 1.34 million dollars per MW.

The HPP generating 14.2 GWh electricity, with the consideration of the sales price of the

electricity - 53 USD / MWh, the price of the sold electricity amounts 0.75 million US dollars

per year.

During the financial analysis the following assumptions were provided:

The total capital expenditure - 4.4 million US dollars;

The duration of the construction work - 2 years;

loans and capital proportion - 60% / 40%;

The payable interest rate on the loan - 10%;

Price of electricity - 5.3 USD / MW / h.

With regard to the above mantioned assumptions and evaluation of the preliminary financial results

are as follows:

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Financial Results

The net present value, USD 600’000 US Dollars

Project internal rate of return ratio, % 14,7 %

The profitability index (the net profit/ total value of the project) 1,14

Payback period in years 8

Break-even chart is presented below:

According to the above-mentioned facts, due to the profitability of the presented project, its

implementation is recommended.

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