Genyem CDA - Civil Tech Sched Waskita (Rev1)

Renewable Energy Development Sector Project Contract Discussion Agreement

Genyem Hydro Power Project

3. CIVIL AND STRUCTURAL WORKS

No Description Employer’s Requirement

(Section 4)

Bidder’s Data Remarks

3.1 SCHEME GENYEM HPP1 Maximum Generation Flow.

The maximum design generation flow shall be the flow through

the scheme which is necessary to produce the Contractor’s

guaranteed power output (i.e., with all generating equipment

operating), taking account of the available gross head, hydraulic

losses, compensation flow, turbine efficiency, generator

efficiency and transformer / switchyard efficiency.

13 m3/sec Confirmed

2 Compensation flow (not less than 0.50 m³/s) Addendum No.1 item No.10

and item No.14.

0.50 m3/sec Confirmed

3 Full supply level El. 414.5 masl. El. 414.5 masl. Confirmed

4 Minimum operating level El. 412.0 masl. Confirmed

5 Turbine runner centreline level El. 215.0 masl. Confirmed

6 Tailrace operating level at max generation flow El. 219.0 masl. El. 219.0 masl. Confirmed

7 Gross head 195.5 m. 195.5 m Confirmed

8 Net Head:

Condition (i) Maximum generation flow, with river level at weir

crest level.

190.80 m Confirmed

PT. PLN (PERSERO) Page 7C - 1 April 08




(Section 4)


Condition (ii) Minimum generation flow with river level at weir

crest level.

Condition (iii) Maximum generation flow with design flood.

188.30 m

194.86 m

Confirmed

Confirmed

9 Water Hammer and Surge Hydraulic Analysis:

The results of the analyses shall be presented to the Employer in

both numerical and graphical format. The graphical formats shall,

as a minimum, show the surge pressures / wave heights that are

developed in the penstock, tunnel, surge chamber and headrace

with respect to time for the following conditions:

i) Water hammer analysis to determine the maximum and

minimum water pressure in the headrace, tunnel, surge

chamber, and penstock resulting from a sudden shut down of

all the generating equipment operating at the maximum

generation flow, with:- The head pond water level at the full supply level.

- The head pond water level at the maximum flood level.

ii) Water hammer analysis to determine the maximum and

minimum water pressure in the headrace, tunnel, surge

chamber, and penstock resulting from a normal start-up of all

the generating equipment to the maximum generation flow,

with the head pond water level at the full supply level.

iii) Surge analysis to determine the maximum height of the

surge wave in the headrace, tunnel, and surge chamber

resulting from a sudden shut down of all the generating

equipment operating at the maximum generation flow, with:- The head pond water level water level at the full supply

Part 1, Sub-Clause 1.28.6.5

Complies with Employer’s

Requirements as specified

in the Bid Document



in the Bid Document



in the Bid Document

Confirmed, description at

detailed design stage









(Section 4)


level.- The head pond water level at the maximum flood level.

iv) Surge analysis to determine the maximum height of the

negative surge wave in the headrace, tunnel and surge

chamber resulting from a normal start-up of all the generating

equipment to the maximum generation flow, with the

headpond water level at the full supply level.



in the Bid Document



10 Provide / attach flood rating curves for the Sermo River at the:

i) Weir

ii) Powerhouse

Attachment No.1:

Curve Rating at Weir or

Intake at Sermo River

Attachment No.2:

Curve Rating at Power

House at Sermo River

Confirmed

Confirmed

3.2 WEIR Part 1, Sub-Clause 1.28.7.2

1 Weir type Gravity Confirmed

2 Construction materials Stone masonry Confirmed

3 Crest level (not greater than El. 415.0 masl) El. 414.50 masl Confirmed

4 Crest length 50 m Confirmed

5 Design flood event Part 1, Sub-Clause 1.28.7.2 d)

(i)

500 years ARI Confirmed





(Section 4)


6 Flood capacity 2,030 m3/sec Confirmed

7 Sluice gate type Part 4, Sub-Clause 4.3 Radial gate Confirmed

8 No. of sluice gates 1 no. Confirmed

9 Sluice gate opening dimensions 3.00m x 2.00m Confirmed

10 Sluice gate actuating equipment type (attach description) Part 4, Sub-Clause 4.3.11 Complies with Employer’s


in the Bid Document



11 Sluice gate bulkhead dimensions 3.40m x 2.50m Confirmed

12 Sluice gate bulkhead actuating equipment type (attach

description)

Addendum No.1 item No.63.

Part 4, Sub-Clause 4.3.11

Complies with Addendum

No.1 and Employer’s


in the Bid Document



13 Compensation flow bypass arrangements (provide description) Addendum No.1 item No.10

and item No.14. Valves see





in the Bid Document



3.3 RIVER INTAKE Part 1, Sub-Clause 1.28.7.3

1 Intake type Front Type Confirmed

2 Invert level El. 409.00 masl Confirmed





(Section 4)


3 Submergence at normal head pond operating level

(El.415.0 masl)

8.10 m Confirmed

4 Submergence at minimum head pond operating level 5.60 m Confirmed

5 No. of intakes 1 no. Confirmed

6 Intake operating dimensions 7.50m x 3.00m Confirmed

7 Intake capacity 13.50 m3/sec

At normal operating level.

Confirmed

8 Intake gate type Part 4, Sub-Clause 4.2 Sliding gate Confirmed

9 No. intake gates 2 nos. Confirmed

10 Intake gate opening dimensions 3.65m x 3.00m (2 unit) Confirmed

11 Intake gate actuating equipment type (attach description) Addendum No.1 item No.63.

Part 4, Sub-Clause 4.3.11.




in the Bid Document

Confirmed

12 Intake bulkhead type Part 4, Sub-Clause 4.2 Structural steel Confirmed

13 No. of intake bulkheads 2 nos. Confirmed

14 Intake bulkhead dimensions 3.70m x 3.00m Confirmed





(Section 4)


15 Intake bulkhead actuating equipment type (attach description) Addendum No.1 item No.63.





in the Bid Document

Confirmed

16 Intake screen inclination (angle to horizontal) Part 4, Sub-Clause 4.4 85 degrees (max) Confirmed

17 Intake screen overall dimensions 7.50m x 3.00m Confirmed

18 Intake screen clear bar spacing 50 mm Confirmed

19 Intake screen bar type Square Confirmed

20 Mechanical screen cleaner type / capacity (attach supporting

brochure and technical data relating to screen cleaner)

Part 4, Sub-Clause 4.5 Complies with Employer’s


in the Bid Document



By Pass Valve ???

3.4 DE-SEDIMENTATION BASIN Part 1, Sub-Clause 1.28.7.5

1 De-sedimentation basin type - Confirmed, description at


2 Construction materials Stone masonry Confirmed

3 Capacity 13.50 m3/sec Confirmed

4 Design flow velocity 1.40 m/sec Confirmed

5 Gradient of invert of de-sedimentation basin (V:H) 0.0465 Confirmed





(Section 4)


6 Dimensions Complies with Employer’s


in the Bid Document



7 Spillway length 73.10 M Confirmed

8 Spillway capacity 13.50 m3/sec

At normal operating level

Confirmed

9 Sluice gate type Part 4, Sub-Clause 4.2 Sliding gate Confirmed

10 Sluice gate capacity (at normal operating level) 2 x 6.75 m3/sec Confirmed

11 No. of sluice gates 2 nos. Confirmed

12 Sluice gate dimensions 6.75m x 4.00m Confirmed

13 Sluice gate actuating equipment type (attach description) Addendum No.1 item No.63.





in the Bid Document

Confirmed

14 Invert level of sluice gates El. 409.00 – 405.60 masl Confirmed

3.5 HEADRACE CULVERT Part 1, Sub-Clause 1.28.7.6

1 Headrace type Rectangular Confirmed





(Section 4)


2 Construction material Reinforced concrete Confirmed


4 Maximum velocity 1.445 m/sec Confirmed

5 Gradient (V:H) 0.0023 Confirmed

6 Dimensions 3.00m x 3.00m Confirmed

7 Soffit level immediately downstream of intake El. 405.50 masl Confirmed

8 Soffit level at upstream tunnel portal El. 409.00 masl Confirmed

9 Headrace culvert intake screen inclination (angle to horizontal) 85 degrees (max) Confirmed

10 Headrace culvert intake screen overall dimensions 3.00m x 3.00m Confirmed

11 Headrace culvert intake screen clear bar spacing 30 mm Confirmed

12 Headrace culvert intake screen bar type Square Confirmed

3.6 TUNNEL AND SURGE SHAFT Part 1, Sub-Clause 1.28.7.7

1 Minimum tunnel dimensions 3.00 m Confirmed


3 Maximum velocity 1.7015 m/sec ConfirmedPT. PLN (PERSERO) Page 7C - 8 April 08




(Section 4)


4 Tunnel gradients (V:H) 0.0010 Confirmed

5 Tunnel soffit level at surge shaft location El. 404.00 masl Confirmed

6 Surge shaft finished internal diameter 8.00 m Confirmed

7 Surge shaft throttle diameter 2.00 m Confirmed

8 Ground elevation at surge shaft El. 426.00 masl Confirmed

9 Tunnel lining internal diameter: - Section 1, from 0.00 m to 150 m,

- Section 2, from 150 m to 1,500 m,

- Section 3, from 1,500 m to 1,779 m.

3.00 m

3.00 m

2.25 m

Confirmed

Confirmed

Confirmed

10 Tunnel lining soffit levels:- Section 1, from 0.00 m to 150 m,



El. 405.50 masl

El. 405.15 masl

El. 404.09 masl

Confirmed

Confirmed

Confirmed

11 Tunnel concrete wall thickness- Section 1, from 0.00 m to 150 m,



0.35 m

0.25 m

0.50 m

Confirmed

Confirmed

Confirmed

12 Tunnel lining material type and properties:- Section 1, from 0.00 m to 150 m,



Reinforced concrete

Reinforced concrete

Steel can

Confirmed

Confirmed

Confirmed





(Section 4)


13 Steel door at Surge Tank Canopy Addendum No.1 (item No.66) Complies with Addendum

No.1 (item No.66)



14 Penstock Inspection Manhole Addendum No.1 (item No.67) Complies with Addendum

No.1 (item No.67)



15 Steel Gate at Junction of Inspection Adit and Tunnel Addendum No.1 (item No.68) Complies with Addendum

No.1 (item No.68)



3.7 PENSTOCK Part 1, Sub-Clause 1.28.7.8

1 No. penstocks / Type 1 no. / Surface type Confirmed

2 Penstock(s) capacity 13.00 m3/sec Confirmed

3 Penstock internal diameter: - Section 1, from 1,511.5 m to 1,770 m,

- Section 2, from 1,770 m to 2,310 m.2.25 m

2.25 m

Confirmed

Confirmed

4 Penstock soffit levels:- Section 1, from 1,511.5 m to 1,770 m,

- Section 2, from 1,770 m to 2,310 m.El. 398.00 m

El. 229.00 m

Confirmed

Confirmed

5 Penstock wall thickness- Section 1, from 1,511.5 m to 1,770 m,

- Section 2, from 1,770 m to 2,310 m.20 mm

20 mm

Confirmed

Confirmed

6 Penstock material type and properties:





(Section 4)


- Section 1, from 1,511.5 m to 1,770 m,

- Section 2, from 1,770 m to 2,310 m.ASTM-A516, Grade 60

ASTM-A516, Grade 60

Confirmed

Confirmed

7 Penstock external coating type: - Section 1, from 1,511.5 m to 1,770 m,

- Section 2, from 1,770 m to 2,310 m.Polyurethane

Polyurethane

Confirmed

Confirmed

8 Penstock internal coating type: - Section 1, from 1,511.5 m to 1,770 m,

- Section 2, from 1,770 m to 2,310 m.Epoxy

Epoxy

Confirmed

Confirmed

9 Penstock Guard Valve House Part 1, Sub-Clause 1.28.7.12 Complies with Employer’s


in the Bid Document

Confirmed

3.8 POWER STATION AND TAILRACEPart 1, Sub-Clause 1.28.7.9

and Sub-Clause 1.28.7.10

1 Power station platform levels:- Loading / erection bay

- Switchgear floor

- Generator floor

- Turbine floor

- Drainage gallery and sump

El. 221.30 masl

El. 220.50 masl

El. 220.50 masl

El. 215.50 masl

El. 212.90 masl

Confirmed

Confirmed

Confirmed

Confirmed

Confirmed

2 Design flood event 500 years ARI Confirmed

3 Design flood flow 2,060 m3/sec Confirmed

4 Design flood level El. 219.00 masl Confirmed





(Section 4)


5 Tailrace bulkhead type Part 4, Sub-Clause 4.2 Structural steel Confirmed

6 No. of tailrace bulkheads 2 nos. Confirmed

7 Sluice gate actuating equipment type (attach description) Addendum No.1 item No.63.





in the Bid Document

Confirmed

8 Tailrace bulkhead opening dimensions 4.50m x 1.30m Confirmed

9 Workshop and Office facilities minimum guaranteed floor area:- Electrical/mechanical workshop

- Electronic workshop

- Main store

- Oil store

- Chemical store

- Hazardous goods store

- Managers office

- Engineering office

- Control room

- Formal reception and secretary office

- Eating and kitchen area

- Medical/first aid facility

- Food/utilities/office store

- Changing room


- 30 m2

-

- 30 m2

- 20 m2

- 12 m2

- 12 m2

- 30 m2

- 40 m2

- 35 m2

- 45 m2

- 25 m2

- 25 m2

- 30 m2

- 40 m2



in the Bid Document



3.9 SWITCHYARD1 Switchyard area





(Section 4)


- Area

- Stone surfacing 15 cm thickness

16.0m x 12.0m

15 cm thickness



Confirmed

2 Fencing- Security Fencing

- Other Fencing

Part 2, Sub-Clause 2.14.1

Sub-Clause 2.14.1.1

Sub-Clause 2.14.1.2

60.0m length

150.0m length

(around the Power House)

Confirmed

Confirmed

3 Cable Ducting Part 2, Sub-Clause 2.14.2 Complies with Employer’s


in the Bid Document



3.10 ROAD WORKS AND BRIDGES Part 2, Sub-Clause 2.4

1 Access road to weir / intake area:- Length

- Finished width

- Access road surface type

- Parking / turning area at weir / intake

- Parking / turning area surface type

1,100 m

6.00 m

Asphalt pavement 50 mm

940.00 m2


Confirmed

Confirmed

Confirmed

Confirmed

Confirmed

2 Access road to tunnel access adit:- Length

- Finished width




600.00 m

6.00 m

Permanent unsealed

200.00 m2

Confirmed

Confirmed

Confirmed

Confirmed





(Section 4)


3 Access road to surge tank:- Length

- Finished width




300.00 m

6.00 m

Permanent unsealed

900.00 m2

Permanent unsealed

Confirmed

Confirmed

Confirmed

Confirmed

Confirmed

4 Access road to penstock guard valve:- Length

- Finished width


- Parking / turning area at penstock guard valve


150.00 m

6.00 m

Permanent unsealed

Permanent unsealed

-

Confirmed

Confirmed

Confirmed

Confirmed

5 Access road to powerhouse:- Length

- Finished width


- Parking / turning area at power house


1,000 m

6.00 m


1,518 m2


Confirmed

Confirmed

Confirmed

Confirmed

Confirmed

3.11 CONSTRUCTION EQUIPMENT Section 7, Schedule of

Qualification, Sub-Clause 7.1

General construction equipment shall not be less than the

following:- Hydraulic excavator (backhoe) (minimum capacity 150 kW)

- Mobile Crane of sufficient lifting capacity for construction of

the works

- Dump truck (minimum capacity 6 cubic metres)

3 nos. (minimum)

6 nos. (minimum)

4 nos.

1 nos.

7 nos.

Confirmed

Confirmed

Confirmed





(Section 4)


- Tracked bulldozer (minimum capacity 100 kW)

- Concrete batching plant (5 m3/h minimum capacity)

- Transmission Line and Switchyard/ Substation Construction

Equipment (Bidders shall provide details of all transmission

line and switchyard/substation construction equipment

including transmission line conductor stringing equipment):

Motor string

Messenger wire

Swivle

Tackle wheel dia.400mm

Temporary anchor

Dynamo meter

Handy Talky

Drum support

3 nos. (minimum)

2 nos. (minimum)

4 nos.

2 nos.

2 nos.

3 nos.

3 nos.

60 nos.

8 nos.

2 nos.

4 nos.

3 nos.

Confirmed

Confirmed

Confirmed

Confirmed

Confirmed

Confirmed

Confirmed

Confirmed

Confirmed

Confirmed

2 Tunnelling Equipment. Bidders shall provide details of all

tunnelling equipment to be provided for the construction of the

Works including:

- Equipment for excavating the tunnel effectively in the ground

conditions to be encountered at the progress rates necessary

to complete the work within the specified time of completion.

- Equipment for removal and disposal of materials (spoil)

excavated from the tunnel.

- Pressure grouting equipment for fracture grouting,

consolidation grouting, contact grouting, backfill grouting, etc.

- Shotcreting equipment.

- Equipment for forming steel ribs and lattice girders for tunnel

support.

- Water collection and pumping equipment to handle ground

3 nos.

2 nos.

3 nos.

4 nos.

3 nos.

2 nos.

Confirmed

Confirmed

Confirmed

Confirmed

Confirmed

Confirmed





(Section 4)


water and storm water that enters the tunnel during its

construction.

- Blower / Exhaust fan 8 nos. Confirmed

4. REQUIRED BID DRAWINGS

The Bidder shall provide, as a minimum, the following drawings with his Bid:

N

o

Employer’s Requirement Bidder’s Data

[drawing (s)]

Remarks

1 General Layout and Long-Section (1) 1 GN-HEPP-C-002

2 Additional Land Acquisition Plan (1) (if required)

3 Diversion Weir, Spillway and Intake Plan, Sections and Typical Details (2) 2 GN-HEPP-C-001 and GN-HEPP-C-003

4 De-Sedimentation Basin Plan, Sections and Typical Details (1) 1 GN-HEPP-C-004

5 Headrace Culvert Plan, Sections and Details (1) 1 GN-HEPP-C-007




6 Tunnel, Portal, Side Adit and Surge Shaft, Plan, Sections and Details including tunnel

support (2)

6 GN-HEPP-C-008, GN-HEPP-C-009,

GN-HEPP-C-010, GN-HEPP-C-011,

GN-HEPP-C-012, GN-HEPP-C-013

7 Penstock Plan, Sections and Typical Details (1) 4 GN-HEPP-C-014 Rev-1, GN-HEPP-C-015,

GN-HEPP-C-016, GN-HEPP-C-017

8 Powerhouse and Tailrace Plan and Sections (2) 1 GN-HEPP-C-018

9 Powerhouse Superstructure and Administration Building - Elevations and Sections (showing

the proposed architectural designs)

3 GN-HEPP-C-019 Rev-1, GN-HEPP-C-020a,

GN-HEPP-C-020

10 Access Road and Drainage Plan, Long - Section and Typical Details (4) 2 GN-HEPP-C-021 and GN-HEPP-C-023

11 Drawings showing main features and dimensions of all plant offered together with clearances

required for installation, operation and generator rotor removal.

3 GXED-001, GXED-002, GXED-003

12 Drawing showing hydraulic gradients for steady state and extreme hydraulic conditions for

the whole system from the intake to the power house, (refer to Section 4, Part 5, Clause 1.8

– Hydraulic Transients) in particular:

(a) Sudden shut down of all the generating equipment operating at the maximum

generation flow with the head pond water level at full supply level.

(b) Sudden shut down of all the generating equipment operating at the maximum

generation flow with the head pond water level at maximum flood level.

(c) Normal start-up of all the generating equipment to the maximum generation flow, with

the head pond water level at the full supply level.

2 GN-HEPP-C-022 and GN-HEPP-C-024

13 Contractor’s site establishment, including contractor’s office, workshops and temporary

construction establishment, Employer’s office, temporary access roads, etc.

4 GN-HEPP-TW-001, GN-HEPP-TW-002, GN-

HEPP-TW-003, GN-HEPP-TW-004




14 Disposal areas for excavated materials. 1 GN-HEPP-C-025

15 Contractor’s proposed construction implementation schedule. 1 GN-HEPP-C-026-1 to C-026-4

Note:

Drawings shall show all major structure levels, diameters, dimensions, sizes, thicknesses, water levels, etc., in sufficient detail to enable a technical

evaluation of the hydraulic adequacy of the power plant to be carried out. The intended surface finish of all waterways shall be shown, so as to enable an

independent evaluation of the hydraulic loss coefficients to be made. The construction materials from which each component of the scheme is to be

constructed shall be shown on the drawings.

The Contractor’s proposed construction implementation schedule (bar chart) shall cover the full construction period, shall provide details of all major

activities, and shall indicate key milestones and the critical path.


Documents

Genyem CDA - Civil Tech Sched Waskita (Rev1)