Detail Feasibility Study Format (Mini Hydro)

8/6/2019 Detail Feasibility Study Format (Mini Hydro)

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This format is intended for use in conducting detailed feasibilitystudies for proposed mini-hydro plants.

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Format for Detailed FeasibilityStudies of Prospective Mini-hydro

Projects


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B. LOAD FORECAST

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C. TECHNICAL INFORMATION

Source River/ Stream: .

INTAKE SITE

Location:..

River Width at Intake site (Approx.):

River Gradient at Intake site (Approx.):-.Elevation: .. masl

GPS Cordinates of intake (x,y, z): .

GRAVEL TRAPGravel trap Location: . m, the from intake

Flushing location & description: .

Are ground protection measures required? Yes No

SETTLING BASINSettling basin: .. m, from the intake

Flushing location & description:


HEADRACEOpen canal lengths & corresponding chainages:.

Headrace pipe lengths & corresponding chainages:

Unstable lengths requiring stabilisation:. m

FOREBAYForebay:

Flushing location & description: ..


PENSTOCKTotal length: .. m, No of Vertical bends: . nos.

No of Horizontal bends: . , Gross head, Hgross: . m.

POWERHOUSE SITEDescription of location: .

Fill in all of the technicalinformation and provideappropriate comments as

necessary, especially in theslope stability issues.

Based on the surveymeasurements and data, state thenumber of individual bendsrequired along the penstockalignment in the space provided.


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. Elevation: .masl

m above annual flood level of the river

GPS Cordinates of intake (x,y, z):

.

Distance from powerhouse to river bank / tailrace exit point: mAre ground protection measures required at powerhouse?

Yes No

OTHER STRUCTURES

Comment and describe if any other hydraulic structures requiredfor the project:

TRANSMISSION LINE

Transmission line length: m

Distribution line length: m

Will part of the scheme alignment or some structures have to be

located on private land? Yes No

If yes, specify alignment/structures that will have to be located on

private land: .

Is (are) the land owner(s) willing to have the alignment/structures

on their land? Yes NoComments:..


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D. HYDROLOGICAL STUDYName of the River /Stream : .

Catchment Area at Intake : . km2

Measured flow at intake, Qi = . l/s

Corresponding Gauge Height : . m at.. (Time)

Date of flow measurement: ..

Method used to measure the flow : Select below

Conductivity Method (Salt Dilution Method)

Velocity Area Method (Current Meter)

Hydraulic Method

(Attach separarte sheet for data & Calculation)

Flow Measured by: ..

Name & Address of the Gauge Reader:

Name:-Address:-

If there are water diversions (e.g., irrigation) close to the intake, i.e.,within 2 hours walking distance, the flow diverted at these locationsshould also be measured and used to determine the 11-monthexceedance flow based on MIP.

Upstream flows abstraction (if any), Qup: . l/s

Specify water use (drinking water, irrigation etc): ..

Downstream water use: Qd: ..(l/s),

Specify water use (drinking water, irrigation etc):

Irrigation practices in the area (seasonal, year round, rotational etc.):

Will there be any water right conflict due to the implementation of the

scheme? Yes No

Comments on water right issues:. .

Other possible conflicts due to the implementation of the scheme:

Multipurpose Projects

Can multiple uses of water resources be promoted in this project?

Yes No

If yes, besides power generation, other uses are:

Irrigation Drinking water Others (specify):

Modifications required in the scheme layout or components toincorporate multiple uses of the water esources:

If flows are abstracted upstream ofthe intake, these should also bemeasured and included.

Selection of Gauging Site andEstablishment of Staff Gauge

The gauging site must beselected with due care to assurethat the stage-discharge curveis reasonably constant over along period of about a fewyears.

The following are selectioncriteria for the gauging site:

i) The stream should havea well defined cross-section thatdoes not change in variousseasons.

ii) It should be easilyaccessible all through the year.

iii) The site should be in astraight, stable reach.

iv) The site should be freefrom back-water effects in thechannel.


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E. TOPOGRAPHICAL SURVEYTopographical Sheet No. :- .Scale of the Map:-(Topographical Maps prepared by Survey Department, GoN)Draw a general sketch (plan) of the scheme from the intake to thetailrace (i.e., birds eye view) in the box below: (Use separatesheets if needed)

Draw a general layout plan of the transmission/distribution areas

from the powerhouse:Similarly, a sketch of thetransmission / distribution lineshould be included in the boxprovided.

A general plan from the intake tothe powerhouse and tailraceshould be drawn at site for

comparison with the surveydrawings, which would beprepared later. Although, thisdrawing need not be in scale, thewaterway lengths and locationsof the structures should bementioned.

It is, however, recommended thatTopographical map (prepared bySurvey Department, GoN) shallbe brought during the Field visitand general plan together with

locations of structures shall bedrawn on the map.


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F. GEOLOGICAL SURVEY1. Format for Diversion Weir Axis ( geological x-section along

weir axis):

Left abutment, right abutment, slopes on left/ right abutments,

width of river banks, composition on river bed material,

composition of abutments etc.). Sample cross section.

2. Format for geological conditions along headrace canal:

chainage vs. geological features like common soil, colluvial

deposit, rock/cliff, stream crossings, cultivated land, forest,

landslide, springs, swamps, foot trail/ road, canal, bridge etc.

Special attention should be given on seepage area and theirevaluation for construction, slope stability, bearing capacity,

ChainageGeological Features Remarks

From To

3. Format for Forebay & spillway (stability of site, area, water

discharge, spillway etc.)

Material at

foundation

Bed rock

Residual soil/

Colluvial

deposit/ Alluvial

deposit/ Glacial

deposit/ anyother type of

deposit

Remarks


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For bedrock

foundation

Fracture

pattern

Parallel /

random

Sets One set/ two

sets/ more

Spacing of

fracture

m to

m

Opening of

fracture

mm to

mm

Dip of

fracture

planes

Towards hill

slope/ cut slope

or against

Chances of

Plane /

Wedge

Failure

Yes/ No

Criticality to

structureRisk/No Risk

For foundation

on deposit

Thickness of

deposit m

Estimate

Composition

of deposit

Boulder mix/

gravel mix/

sand mix/ fine

material

Degree ofCompaction

Well/ moderate/slightly/ loose

Ground

water/

seepage/ or

dry

lit/min

Any land

slides or

mass

movement in

the structure

area

Yes/ No

If yes

Circular

failure

Size

Criticality to

structureRisk/ no risk

Planer failure

Size

Criticality to

structure

Risk/ no risk

Wedge

failure

Size


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Criticality to

structureRisk/ no risk

4. Format for penstock (slope, composition of foundation soil/

rock, bearing capacity, overburden etc.)

ChainageSlope

Geological

Features

Soundness for

foundationFrom to

5. Format for powerhouse/ tailrace site: topography,composition of foundation materials, type: surface, semi

underground, in deep excavation; distance from river bank, HFL,

The excavation line should be modified and brought outside for mini

hydro surface penstock and powerhouse

FORMATS FOR CONSTRUCTION MATERIAL SURVEY

(a) Sand and Aggregates

Borrow Area No. (prepare separate tables foreach borrow area separately)


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Location

Length, m

Width, m

Height/ Depth, m Average of all test

pits

Volume, m3

Sand, m3 %

(Average)

Aggregates (20 mm),

m3 %

(Average)

(Prepare separate table for each deposit location/borrow

area)

(b) Impervious Materials

Location

Length, m

Width, m

Height/ Depth, m (Average depth)

Volume, m3

(Prepare separate table for each deposit

location/borrow area)


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G. SOCIO-ECONOMIC DETAILSEconomic ConditionIncome Level

VDC Villages

No. ofHouseholds with

high level

Income

No. ofHouseholds with

Middle Level

Income

No. of Householdswith Low Level

Income

Economic Activity

Income Sources

No. of

Persons Households

Agriculture

Livestock

Daily wage/Porter

Business

Cottage Industry

Livestock Products

Fruit and Vegetable Sales

Service

Pension

Remittance

Agricultural Production

Product Unit AnnualProduction

Price perUnit

Paddy

MaizeWheat

Millet

Oilseed

Buckwheat

Potatoes

Industry and Craft

TypeTotalNo.

Location

VDC VillageWard No.

Rice/TimberMill

MechanicalWorkshop


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Furniture

Bakery

Milk Products

Kami

Alcohol

Business Entities

TypeTotalNo.

Location

VDC VillageWard No.

Retail shops

Tea Shops

Hotel/Lodge

Bank

Ag. Tools &Equip. Shops

ConstructionMaterialsShops

ElectricalGoods

Photocopy

Doctors Clinic

Printing Press

Public Services

TypeTotalNo.

Location

VDC VillageWard No.

Temple

SportsGround/Park

VDC Building

Meeting Hall

Hospital/HealthPost

VeterinaryHospital

Irrigation Office

Forest Office

Ag. ServiceCenter

Police Post

Post Office

TelephoneOffice

Electricity Office

Water SupplyOffice

AirportSchools


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Local Level Capacity

EducationLevel &

Type of Skills

TotalNo.

Location

VDC VillageWard No.

Carpenter

Masons

Electricians

PlumbersOther SkilledManpower

UnskilledManpower

Education

Education Level &Type of Skills

TotalNo.

Location

VDC VillageWardNo.

Illiterate

Up to Class 10

High School &Above

Students:- Girls- Boys

Drop Outs:- Girls- Boys

Consumption of Energy

TypeTotal

Location

VDC VillageWard No.

Kerosene(Ltrs./Month)

Firewood(kg./Month)

Ag. Residue(kg/Month)

Battery(No./Month)

Animal Dung(kg./Month)

LPG(Cylinder/Month)

Others (Specify)

Any development activities planned for the next three years?

Administrative Building . Factory .School . Cottage Industry .Water Supply . Handicraft .Sports Ground/Park . Cooperative .


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Health Post . Irrigation .Hospital . Mining .Telecommunication . Road .Bank . Other (Specify) .Rest House .

If your VDC/village is provided with electricity services, howmuch would the people be willing to pay per month?

Description

% of HHs

Rs. 50 Rs. 100 Rs. 150 Rs. 200Over Rs.

200

High IncomeHHs

Middle IncomeHHs

Low Income HHs


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H. LOCAL RATESLocal Material Rates

Description

Unit Rs./unit Comments

Sand

Block stoneBond stone

Coarse aggregate

Wood

Unskilled labour Md

Mason Md

Carpenter Md

Technician Md

Kerosene litre

Diesel litre

Petrol litr

Pole Nos.

Transportation Rates

Type Unit Rs./unit

Comments

Truck/tractor

Mule - easyload

- difficult

Porter - easyload

- difficult

Nearest major supply market for the project : All weather road-head of the project site : Fair weather road-head of the project site :

Estimated Annual Operation and Maintenance cost

Operating costsAmount/month

(RS)Comments

Salary manager

Salary operator 1

Salary operator 2

Salary accountant

Salary others

Salary others

List the human resources costs required torun the plant. Note that the manpower of MHplants is also based on the size of the plantand the distribution area covered.

All salaries of people employed by the MHP -manager, operators, accountant should beestimated based on nearby MHP plants orthe prevailing rates in the community forsimilar type of work (e.g., school teacher,government employee etc.)


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Office expenses

Miscellaneous

Total monthlyoperating cost

Annual Operating costs: ..

Estimated annual maintenance cost: % of total project cost

Total operation and Maintenance cost: Rs .


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I. MANAGEMENT & IMPLEMENTATIONMODEL

Management

Proposed ownership: Company Community..

Proposed Name of Project:.

Comment: .....

Key People in proposed plant

ameRole in the proposed

MH PlantComments

Probable organisational structure

Availability of local people

- with managerial / business skills - Good Fair Poor None

Manager already selected? YesNo

If yes, name: .......

Experience: ...

- with technical/mechanical repair skills - Good FairPoorNone

Type of training required if any:

Note the type of ownership proposed forthe scheme; Company means a group ofprivate individuals organising together tooperate the MHP as a business for profit;Community means a group representativeof the community to be served by theMHP collects the equity and organisesthe financing of the MHP and will operateit on behalf of the community. Also

include proposed name of managingorganisation if known.

List the key people involved in the projectand their role (e.g., developer,entrepreneur etc.)

Draw a simple sketch of the proposedorganisational structure, eg.

Estimate the level of entrepreneurialability of the management compared withother business people of the area.

Assess the anticipated level of communityparticipation in the MHP scheme, i.e. isthe community involved in setting the tariffrate, making policy decisions? Such ashow to punish payment defaulters etc.

Comment as necessary.Note the availability of local people orpeople who are currently living away fromthe area but willing to return if a suitableopportunity arises with managerial and/orbusiness operation experience, eg. havesuccessfully operated a small business.Note if a person has already beenselected to manage the scheme and thetype of experience they have had. Ifsomeone has not already been selectedcomment on how they will be selected.

Comment should also be provided ifPoor or None is checked for the

availability question. Note also ifoperators have already been selected,their names and experience, and howthey will be selected if they have notalready been.


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If No, how will the manager be selected? .

Operators already selected? Yes No

If yes, how? .. Name: ...

Experience: .....

Type of training required if any: ...

If no, how will the operator(s) be selected? ..

IMPLEMENTATION MODEL (EQUITY/DEBT RATIO)

Equity contribution by developer and loan requirements:

Equity amount the developer/community is willing to invest:

Cash contribution: Total Rs. (or . . % of the TotalProject Cost)

and Rs. / household if community owned.

Labour contribution . Persons/day = Rs. .

In case of insufficient funds, the developer will:

Increase the equity contribution to meet the balance

Withdraw a bank load for the balance

Also note down whether trainingrequirements are essential for themanager and operators (if alreadyidentified) and briefly describe the type of

training required.

If this is a community owned schemebased on discussions at site, state alsothe cash contribution by participatinghouseholds as well as the labourcontribution in terms of person days as

well as in rupee amount.

Since the project cost will be determinedat a later stage the loan amount cannotbe fixed at site. However, the surveyteam should inform the developer thatthere may be a need for a bank loan if thesubsidy and the equity amount are lessthan the total project cost.

Documents

Detail Feasibility Study Format (Mini Hydro)