Rehabilitation of LABOOS Booster Water Pump Station in Yemen - ''YEHCP''

New clarification added: Dear Bidder Please find the Clarifications for below questionsQ1-  Regarding item No 1.2 Arch-CIV in lot 1Site presentation works for PV site, when We visited the project site, we found that the site needed leveling, which involved cutting rock and backfilling exceeding 10,000 cubic meters. This represents a very high cost. All of this work was stated as a L.S. Is it possible to change the the quantity unit from L.S to cubic meters, otherwise this item price will be underestimatedAns - Please adhere to all specifications, drawings and BoQ contained in the tender documents.Q2-2.6 Buildings, Lot 3. Is this item reinforced concrete or ordinary concrete? Please clarify.Ans - Please adhere to all specifications, drawings and BoQ contained in the tender documents.Page 38 contains drawings of reinforced concrete, but they have not been included in any item.Ans - Please adhere to all specifications, drawings and BoQ contained in the tender documents.Q3Lot 3 4-3 Regarding item 6 (33 KV OVERHEAD LINE MATERIALS) in the Lot 2 BOQ, we have identified several factors that need to be considered to ensure the successful completion of the works.33 KV porcelain, Post Vertical Insulator w / stud bolt & Clamp w/Bracket ,QTY : Pcs12033 KV porcelain, Post Horizental Insulator w / stud bolt & Clamp w/Bracket ,QTY : Pcs160Pin Insulator w/Spindle,QTY : Pcs340H.D.Galv. cross-arm, (2400x100x100xx12) mm,QTY : Pcs 160H.D.Galv. Terminal strap ( 150 x 130 x 10) mm ,QTY :Pcs60H.D.Galv. Tie strap (590 x 40 x 8 )mm ( 2) holes 22 dia,QTY :Pcs148H.D.Galv. Section strap ( 550 x 100 x 10 ) mm galvanised,QTY :Pcs60H.D.Galv. M . B ( 20mm x 45 ) mm with lock nut &spring washre .,QTY :Pcs240H.D.Galv. M . B ( 20mm x 350 ) mm with lock nut &spring washre .,QTY :Pcs420H.D.Galv. M . B ( 20mm x 300 ) mm with lock nut & spring washre .,QTY :Pcs120H.D.Galv. squares washer flat 57x6 mm dia 22mm .,QTY :Pcs500H.D.Galv. washer curved 75x6 mm dia 22mm .,QTY :Pcs350H.D.Galv. Round washer flat 35 mm dia 22mm .,QTY :Pcs40033 KV porcelain, Disc insulator (1set = 3disc ),QTY :Pcs594Tension clamp for (ACSR 100 mm²) .,QTY :Pcs198H.D.Galv. Anchor shackle .,QTY :Pcs198H.D.Galv. Eye link .,QTY :Pcs198H.D.Galv. Socket eye connection link.,QTY :Pcs198Angle suspension clamp for conductor ACSR (100) mm²,QTY :pcs60H.D.Galv. Eye- bolt ( 20 x 350 ) mm with lock nut & spring washre .,QTY :Pcs140H.D.Galv. Eye- nut 20mm.,QTY :Pcs30H.D.Galv. Lock nut 20 mm.,QTY :Pcs50Mid span Compressed Tension Joint for conductor ACSR (100)mm2,QTY :Pcs35H.D.Galv. Dubale arminge bolt (M20 x 450 )mm, w/ luck nut & washer,QTY :Pcs80AL/AL connector (100) mm² P.G type.,QTY :Pcs19033 K . V STAY SETsetH.D.Galv. Stay rod ( 20 x 2400 ) mm with adjustable w- thimble,washer&nut,QTY :pcs110H.D.Galv. Expanding Rock Anchor .,QTY :pcs11033 KV porcelain, Stay Insulator,QTY :Pcs110Stay wire 100 mm2 Steel high strength.,QTY :M1700H.D.Galv. stay plate (400x 400 x 6 )mm,QTY :pcs40Stay preformed Guy gripes for stay wire (70) mm2 .Warp type,galvanised steel.,QTY :pcs500H.D.Galv. Stay Clamp steel,QTY :pcs880H.D.Galv. U line,QTY :kg3tie wire,QTY :M1000Over head shield wire for ( 70) mm2 STEEL Galvanised,QTY :KM4Dead end clamp for shield wire ( 70) mm2 STEEL,QTY :pcs12H.D.Galv anckor sheckl for Shield wire .pcs25Earthing rod w/ driving cap CU(20X1200)mm,QTY :pcs75CU/CU connector(70) mm2,QTY :pcs75CU/AL connector(70) mm2 ,QTY :P/Gpcs30Earthing wire copper (70)mm2,QTY :M750Electric earth rod w/ clamps earthing,QTY :pcs75PLASTIC PIPE (30mm2x3000mm length),QTY :pcs45Danger Platspcs,QTY :174Number Platspcs,QTY :174Barbed wire. galvanised,QTY :M600STEEL CLIP with two scrap galvanized,QTY :pcs260Ans - Please adhere to all specifications, drawings and BoQ contained in the tender documents.Q4?Is it possible to enter only one of the three tenders Yes it is possible to enter a seprate LOT

New clarification added: Dear Bidders Please find below answers for Clarifications: Q1- As per the site visit, for LOT 03 - BoQ - C1 & C2 3- Mechanical Work sheet item 3&4 only refer to steel pipes while there is Ductile iron pipe exist at site and it mentions also in the techincal questionnaire . please advise if the Ductile iron pipe is in our scope.Ans an Amemdment will issued Q2 please kindly extend  the  tender  because  the  submition period is  not  Enough   and  we  have Q3 - We are waiting to responde for our inquiries  above so we are preparing the technical specifications as per  your requirements and you have not replied for our clarification until now, . As you know, there is not enough time due to EID Aladhaa holiday,  we want you to extend the bid for more weeks  . Best regards,   Dear UNOPS  , We are waiting to responde for our inquiries  above so we are preparing the technical specifications as per  your requirements and you have not replied for our clarification until now, . As you know, there is not enough time due to EID Aladhaa holiday,  we want you to extend the bid for more weeks  . Ans Exntesion has already been done

New clarification added: Dear Bidders Please find below answers for Clarifications: Q1 -   Dear Sirs, Please send us the SLD and technical specifications for transformers in & Switchgears as per the BOQ .with best regards Dear Sir,Following our recent site visit , we have identified some concerns that require clarification and guidance:Control Room, generator ,switchgear Area Adequacy:We observed that the designated area for the control room generator and switchgear appears insufficient due to elevation differences on-site.Furthermore, the current design does not seem to account for necessary retaining walls.Civil Works BOQ for for LOT2:We note that the Bill of Quantities (BOQ) for LOT2 does not include civil works. Please advise ??Pump station at the Forwareder and booster:Please advise as the BOQ didn't mention the foundation of the 6 Pumps and and trenches and cutting the slabs and carry out the new trench pump to pump.regard  Dear UNOPS Regarding to:Lot_1 Electrical worksItem No "6" AC power cables, item 6.1.1 is without quantity, item No "6.1.1, 6.1.2, 6.1.3" The description of the insulation and working voltage aren't mentioned.Item No "9" Switchgeer System 11kv & Accessories, in the BOQ the description of C.B is Vacuum, while in the drawing is SF6, which one is the correct description Lot_2, Electrical Works, item No "6", the column quantity description is not mentioned what is it. Dear sir  Please to provide us with:1- Fuse switch panel drawing item no. 9.3.5 lot012- NI-CD batteries and charger specification item no. 9.3.6 and 9.3.7 lot013- 11kv and 33kv Neutral resistor specification item no 10.7 lot01, item 1.7 lot02 and item no. 5.1 lot02 Best regards Q1: For Lot 3 : There is 2 repeated BOQ with  same Quantities ., please clarify ?Q2: Please share the technical specifications for the 4MVA along with the Technical schedules ?.Q3: for the bosster pump : do you accept the Asian origin ( Indian or Chinese )? Q4: in LOT 3: Please share the technical specification and technical schedules ( Questionnaire )  for (diesel generator 1250KVA ) ?For all the above : - Please adhere to all specifications, drawings and BoQ contained in the tender documents. 

New clarification added: Dear Bidders Please find below answers to clarification Q1- We are requesting an extension to the tender submission deadline. This request is due to two primary factors: the upcoming ten-day Eid holiday and the fact that we are still awaiting your response to our previously submitted clarification questions.The Eid holiday will understandably limit our team's availability, and the outstanding clarifications are Essential for us to accurately complete the tender To ensure a well-prepared and compliant submission, we would greatly appreciate a 2-3 week extension.Thank you for your understanding and consideration.Ans - Tender already exntended Q2- I would be grateful if you could provide the coordinate profile for the wood poles in Excel format.Ans - Please convert the folder as requrired Q3- Regards, Subject: Request for Extension of Tender Submission DeadlineWe would like to bring to your attention that the current tender submission date coincides with the official Eid vacation period. During this time, many engineers and private company employees will be on vacation. This is followed by the regular weekend for external companies.Therefore, we kindly request extension of the tender submission deadline to ensure the best participation and competitive pricing.Thank you for your understanding and consideration.Ans - Tender already exntended 

New clarification added: Dear Bidders Please find below answers for Clarifications: Q1 -We are writing to formally seek clarification regarding Lot 1 – Metal Clad SF₆ Switchgear as part of the current tender documents. We have identified a discrepancy in the provided information:            •           The Bill of Quantities (BOQ) indicates a 33 kV specification.            •           However, both the drawings and the filled technical documents reflect a 11 kV rating. This inconsistency is causing confusion, as it directly affects the technical and commercial accuracy of our offer. We respectfully request confirmation of the correct voltage level required for the switchgear so we may proceed with an accurate and compliant submission. Additionally, we emphasize the importance of the Single Line Diagram (SLD) in this matter, as it is a critical reference for configuring and pricing the equipment appropriately. Given the urgency and the upcoming Eid holiday, we kindly request an extension of the submission deadline. A minimum of two additional working days would allow us to incorporate any clarifications you provide and ensure our offer meets your expectations.Ans 1   - Please adhere to all specifications, drawings and BoQ contained in the tender documents. Q2- Based on the SLD, the project includes a single 11/33kV transformer. The power is then transmitted through 33kV overhead lines to two compact MV stations, each stepping down the voltage from 33kV to 0.4kV. The SLD does not indicate the presence of any additional 11/33kV or 33/11kV  transformers.However, in the BOQ for Lot 1, an 11/33kV transformer is listed:Item 10 – 4MVA 11/33kV TransformerSimilarly, the same transformer appears in Lot 2:Item 1 – 4MVA 33/11kV TransformerThis suggests that two 11/33kV transformers are required, which contradicts the SLD. Could you please confirm whether one or two transformers are required, and clarify if there is an update to the SLD?Additionally, we noticed that the following 33kV items appear in both Lot 1 and Lot 2, although logically they should be required in only one lot if only one 33kV transformer is involved:33kV metal clad SF6 switchgear33kV AC power cablesCould you please clarify if these items are intended to be duplicated in both lots, or if this is an oversight?Ans 2   - Please adhere to all specifications, drawings and BoQ contained in the tender documents.Q3 - Some observations and inquiries regarding the project are as follows:- 4 MW Medium Voltage Transformer 33KV:This item is mentioned twice in both BoQ LOT-1 & LOT-2. Should it be accounted for LOT-1 or LOT-2?  Keeping it in both LOT's would increase the overall project cost.- 33 kV Medium Voltage Metal clade (Switchgear):This item is mentioned twice in both BoQ LOT-1 & LOT-2. Should it be accounted for LOT-1 or LOT-2?  Keeping it in both LOT's would increase the overall project cost.There is a discrepancy in the number of outcome feeders: only one out-going feeder is indicated in BoQ LOT-1, while two out-going feeder are indicated in BoQ LOT-2 (which is the correct number as per the drawings). Please indicate the correct number of out-going feeders?- Generator Synchronization Panel:Only one panel is listed in the Bill of Quantities LOT-1, while the drawings show two panels. Please confirm the correct quantity. Also, specify the number of circuit breakers required in the item description in the Bill of Quantities?- Power Cable 4 Core × 25 mm²: The length of this cable is not specified. This cable connects the Auxiliary transformer to the control room distribution panel. Kindly confirm the required cable length?Ans - For this topic, we will make an amendment to BoQ for Lot-01+ Lot-02.

New clarification added: Dear Bidders Please find below answers for Clarifications: Q1 - We are requesting an extension to the tender submission deadline. This request is due to two primary factors: the upcoming ten-day Eid holiday and the fact that we are still awaiting your response to our previously submitted clarification questions.The Eid holiday will understandably limit our team's availability, and the outstanding clarifications are Essential for us to accurately complete the tender.To ensure a well-prepared and compliant submission, we would greatly appreciate a 2-3 week extension.Thank you for your understanding and consideration.Ans - Tender already extended. Q2 - Please provide us with the detailed SLD ,drawings ,technical specifications and Technical questionnaire for Power Transformer 4MVA . Ans - Please adhere to all specifications, drawings and BoQ contained in the tender documents.Due to the short duratioin avilable for submission deadline , which also, will  consides the Eid  Holidy , as well as , given  the accuracy, detailed and complexity of the requirments, the matter requests longer time .Accordingly, kindly requested to extend duration for deadline for tow weeks more. Ans - Tender already extended. 

New clarification added: Dear Bidders Please find below answers to clarification Questions below:   Kindly recheck and confirm the Vector Group for the following transformers to ensure compliance with project specifications:4 MVA, 11/33 kV2000 kVA100 kVA1500 kVA2000 kVA  Dear UNOPS ,  Regarding the received specs for AC cable ( LOT 01 3-0 PV DIESEL ) ; Kindly be noted that there is conflict between received specs and BOQ regarding rating voltage as specs specify 15 kv while BOQ specify 11 kv & 12 kv & 36kv so please advise ? B.R ,  Dear UNOPS,Kindly find below our requests for clarificationLot 1 18.0 Please clarify the location of the trenches in the electrical drawings.Item 2.8.3 Civil Please specify the number required per meterLot 3c1 Civil, Item 2.1 Please clarify the requirements.Lot 3c1, Item 18 Mechanical, no counter diameters were specified.No meter inspection chamber drawings were provided.Item 19: The same idea. Does the item include the value of the pipes? 3c2: The same problem.Regard, Lot-2- electricalItem 1: Power Transformer & it’s switchgear are already mentioned in Lot-1 BOQ, and from the drawings in lot-1 & Lot-2 are clear that the system has only on step-up power transformer which makes us think the item was repeated.Item 4.1 AC NEW MDB, it has been written that the panel should be Suitable to receive at least 14 feeders, there is no any description for the feeders in BOQ nor in drawings. Item 4.2 AC NEW MDB, it has been written that the panel should be suitable to receive at least 14 feeders, there is no any description for the feeders in BOQ nor in drawings, also was written ACB 100A, there is no ACB breaker with this capacity.Item 5.1 Medium Voltage Station MVS, PACKAGE (MV SUB STATION), it was written Step UP transformer three phase, but in the Technical Questionnaire was written Step-Down, which one is the correct one.Item 5.1 the transformer has two description of vector group in the same block, one as Dyn11 & Dy11y11, which one is correct. Item 5.1 the transformer has two descriptions of Tapping in the same block, one as ±8 *1.25% & one as ±2×2.5%, which one is correct.Item 5.1 the transformer was mentioned as ONLTC in the BOQ, whereas in technical questionnaire was mentioned as OFF Load Tap changerItem 5.1 the transformer voltage was mentioned in the BOQ 33/0.415KV & also 35/0.415KV, whereas in the technical questionnaire is 36/0.415KV. which one is the correct one, the standard voltage is 33/0.415KV.  Dear SirPlease to confirm that the vector group is YnYnd for Item no.10.1 (three-winding transformer configuration, high-voltage and low-voltage windings are connected in a star(Y) configuration)Dear sir Please to confirm  1- That the 2000KVA 33/0.415KV transformer vector group is Dyn11  for Item no. 5.1  Lot02 BoQAlso the tap changer  ONLTC (+/-10% 17Step) ±8 *1.25%  Brand MR or any Brand 2- That the vector group is YnYnd for power transformer 4 MVA, 11/ 33 KV,  Item no.10.1 - Lot01 BoQ (three-winding transformer configuration, high-voltage and low-voltage windings are connected in a star(Y) configuration) Kind Reminder We sent you two clarifications and we didn't get any answer Thank you Dear Sir,We are writing to request clarification regarding a discrepancy between the Bill of Quantities (BOQ) and the drawings for the Forward Pumping Station (LOT 03 - 4-2 A) and the Booster Pumping Station (LOT 03 - 4-3, Drawing LAH-005-C_1).The BOQ states that the scope includes the installation of 3 new pumps. However, the drawings (MC-01 & MC-02) indicate that the scope involves replacing the existing 3 pumps with the new pumps and utilizing the spare foundations to install the old pumps.Ans to all the above : Answer - Please adhere to all specifications, drawings and BoQ contained in the tender documents. 

New clarification added: Dear Bidders Please find below answers for Clarifications: Q1- For the 4MVA Transformar Further specifications asks for MR Make OLTC , generally for such a small rating of transformers, customer do not insist for MR Make, further to same, MR make OLTC delivery period is approx.. 15-18 months, please reconfirm your requirement.Ans 1 - For the 4 MVA Transformer MR Make OLTC or equivalent  and  Please adhere to all specifications, drawings and BoQ contained in the tender documents.

New clarification added: Dear Bidder Please find answers to clarifcaitons below:  15) Equipment Description New Medium voltage system Package Unit for Distribution transformers 2 MVA 33KV/0.415) Technical Clarifications- Request to share the specification and data sheet for package unit station requirement for forward and booster pumping station requirement.16) Equipment Description33kv SF6 Switchgear, 1250A,31.5KA/1sec, with all Protection,Control, Indication, Alarm,and Metering devices, metal clad, indoor type switchgear suit with cu type, insulated single busbar according the technical specification, & drawings.comprising,as per technical Specification.16) Technical Clarifications '- Project specifications are not clear about the protection & metering requirement. Please share the details.- Please confirm the feeder configuration.- Please confirm the current rating of 33kV switchgear.  15) Equipment Description15.1 ) 33kV RMU, 1250A, 31.5kA/1, 3-Way 15.2) Scada System 15) Technical Clarifications15.1) -  Project specification is not clear about the 33kV RMU requirement. Please share the project specification and data sheet along with protection & metering requirement, if any.15.2)  - Specifications are not clear about automation, SCADA requiements. Please confirm these requirements with tentative communicaiton architecture and communication protocol Tender submitted with two SLD's :One in BOQ lot 1 without 33KV and it shows 11 KV lines going to wells (file name LOT 01 - 4-2 - Drawings PV-Elec. Page 22)Second in BOQ lot 2 with 33KV ….(file name LOT 02 - 4 -Drawing - B-33 KV TRANSMISSION LINE-1-20 page 6)Based on above please clarify the following :1 - Which SLD should considered ??2, Synch panel in lot 1 BOQ in LV side or 11KV side  ( if in Low; how grid voltage will mix with solar/Generator at 11 KV)3- Bus Coupler in 11KV switchgear required or No.4. In lot 2 SLD it shows two incomers at 33KV switchgear ; one from transformer and second from  33KV network .. In another drawings it shows that is Outgoings not incomer (should we considered that as incomer or spare outgoings) Synch panel : drawings shows synch panels in Generator sides .. Please confirm Synch panel at low or medium voltage side transformer V±2*2.5%,3Phase , - Not clearVector group : 0.8 - 0.415 kV / 35 kV ,LV / MV voltage : Dy11y11 – Not clear  ,  Transformer is 2 winding or 3 winding ?Maximum input current at nominal voltage : 2000 A * 2 – Not clearFrequency :50 Hz / 60 Hz – Please specify any one frequency it can not be either or .Tapping on HV0, ±2×2.5% - Not clear Package substation ;1) 33kV ; 2000KVA transformer size will be big … should we considered to install transformer outside the package to avoid the conjunction in space , the weight of package and cooling factors2) Drawings shows Com100 connected to 2MVA T/S and SF6 Switchgear . what is the function of COM100 with that equipment's ???3) New Medium voltage system Package Unit Distribution transformers 2 MVA 33KV/0.4 details not available in specification. Please share the package station specifcations.Altitude : 2550 meter altitude will derating all equipment's … should we considered that in all costing for most of electrical equipment's  For all the above the answer as below: - Please adhere to all specifications, drawings and BoQ contained in the tender documents. 

New clarification added: Dear Bidders Please find below answers for Clarifications:Q1- 5) Equipment Description5.1 ) Lot2 4MVA, 11/33KV, Step Up power transformer with (MR) ON load tap changer, voltage variation range +5%,-15% at 1.25 % step voltage , Vector group Dyn11 outdoor 5.2) AVR Panel for above transformer with on load tap changing5) Technical Clarifications5.1) Need clarity on requirement of 11kV Switch fuse unit panel for this transformer & AVR Panel- Please confirm AVR Panel (RTCC) Panel requirement.- Please share power transformer specification, data sheet.- Please confirm Qty.5.2) Confirm the requirement with possible detail BOQ.Ans 1 - - Need clarity on requirement of 11kV Switch fuse unit panel for this transformer & AVR Panel. SFU is reuired - Please confirm AVR Panel (RTCC) Panel requirement. RTCC required with Auto and manual mode - Please share power transformer specification, data sheet. Please adhere to all specifications, drawings and BoQ contained in the tender documents. - Please confirm Qty. Please adhere to all specifications, drawings and BoQ contained in the tender documents. 

New clarification added: Dear Bidders Please find below answers for Clarifications: Q1- 2) Equipment Description11kV, 630/200A, 31.5kA/1Sec, Outdoor RMU: 4 Sets11kV Ring In -630A - 1No11kV Ring Out -630A - 1No11kV Trafo OG Feeder-630A - 1No2) Technical Clarifications'- RMU configuration & Qty. (e.g. 2 INC+1OG, etc)- RMU SLD??- Please share RMU Outdoor Specifications.ans - Please adhere to all specifications, drawings and BoQ contained in the tender documents.Q2 - 3) Equipment Description11kV, 2500, 31.5kA/3Sec, AIS Switchgear, IP 42: 1 Set11kV Incomer with line VT -630A             - 4No11kV Bus Section + VT panel -630A         - 1No11kV OG Feeder-630A                               - 3No11kV Switch Fuse panel (Aux. Trf)           -1No 11kV Bus VT Panel                                      - 1No.3) Technical Clarifications'- Please calrify, for Aux. Trafo feeder switch Fuse Panel required or Breaker Panel. BOQ shows switch fuse & SLD indicated Breaker Panel.- Please confirm that separate CRP Panel required Or protection relays & meters can be part of swtichgear.- Please confirm the actual STC requirement 31.5kA Or 25kA.- Please confirm the SCADA Operation requirement.- Please confirm BCPU requirement and communication protocol.- Please confirm ethernet switch requirement.Ans 2 -  - Please calrify, for Aux. Trafo feeder switch Fuse Panel required or Breaker Panel. BOQ shows switch fuse & SLD indicated Breaker Panel. to avoid multiple maintenace Breake recommended  - Please confirm that separate CRP Panel required Or protection relays & meters can be part of swtichgear. can be part of Panel - Please confirm the actual STC requirement 31.5kA Or 25kA. 25KA/3 sec - Please confirm the SCADA Operation requirement. Please adhere to all specifications, drawings and BoQ contained in the tender documents. - Please confirm BCPU requirement and communication protocol.Please adhere to all specifications, drawings and BoQ contained in the tender documents - Please confirm ethernet switch requirement.Please adhere to all specifications, drawings and BoQ contained in the tender documents 

New clarification added: Dear Bidders Please find below answers for Clarifications:Q1 - In regard tothe Swtichgear please note the following Clarification 1)  Equipment Description33kV, 2000A, 31.5kA/1Sec, SF6, GIS Switchgear   33kV Line Incomer-1250A with line VT  - 1No33kV Line Incomer-1250A with Line VT - 1No33kV Trafo Outgoing feeder-1250A       - 1No33kV Bus VT Panel                                    - 1No1) Technical Clarifications'-Is there any requirement of line differetial protection for 33kV Line Incomers.-Derating not possible for 33kV Voltage rating with higher voltates. Only higher BIL can be offered as per higher altitude.- Please clarify the requirement of Tariff Metering. Also confirm the locaiton of tariff metering e.g. 11kV Or 33kV Switchgear.- We will provide Surge arrestor instead of lightning arrester for 33kV Switchgear??- Please re-confirm 87T & 64R Differential Protection requierment for 4MVA trafo. Its mentioned in SLD but as a standard practice these protection are normally applicable for 5MVA and above rating.Ans -  Is there any requirement of line differetial protection for 33kV Line Incomers. Yes- Derating not possible for 33kV Voltage rating with higher voltates. Only higher BIL can be offered as per higher altitude. Derating of altitude at 2550 msl  should be considared - Please clarify the requirement of Tariff Metering. Also confirm the locaiton of tariff metering e.g. 11kV Or 33kV Switchgear.  in 11KV side  - We will provide Surge arrestor instead of lightning arrester for 33kV Switchgear?  Noted - Please re-confirm 87T & 64R Differential Protection requierment for 4MVA trafo. Its mentioned in SLD but as a standard practice these protection are normally applicable for 5MVA and above rating. As type of protection and due to importantance of project Differential Protectionis requseted

New clarification added: Dear Bidders Please find below answers to clarification Q1- The manufuture have inquire some information miss which need to complete the offer 33kv metal clad sf6 switchgear we need the SLD and the more technical requirement Switchgear system 11kv Technical requirements  4 mva 11/33 /step up power transformer need SLD and. technical requirements   Ans 1 - Please adhere to all specifications, drawings and BoQ contained in the tender documents.Q2 -   We would appreciate your feedback on the following inquiries raised by the manufacturer regarding the type test requirements for transformers and switchgear for the Laboos Well Field Project. Kindly provide the following details:1. Basic Information & Specific Data for Type TestsThe manufacturer requests clarification on the following key parameters:No-load lossLoad lossRating (kVA)No-load voltage ratioTemperature risesBasic impulse level (BIL)Total weight (including oil)Oil quantityApproximate dimensions (length, width, height)Tank thickness (walls, base, and cover)General arrangement drawingsHV and LV bushing assembly drawingsAns - Please adhere to all specifications, drawings and BoQ contained in the tender documents.2. Additional Design-Specific DataAs per Schedule Tr-02, please also provide any additional design-specific technical data relevant to the project requirements.We kindly request your prompt response to ensure compliance with project specificationsAns - Please adhere to all specifications, drawings and BoQ contained in the tender documents.​Q3 -   Can you please provide us with the SLD for the medium voltage ?Ans - Please adhere to all specifications, drawings and BoQ contained in the tender documents.​Q4- Regarding Lot 3 : It's not mention in the technical questionnaire the specification for generators , and it's not mention that you want canopy sound proof or open generator . - For this topic, we will make an amendment to Questionnaire and a special table will be added for the generator.Q5- PLEASE KINDLY EXTEND THE BID FOR MORE DAYS AS THE TENDER SUBMISSION WILL BE IN EID VACATION . Ans - Tender already extended 

New clarification added: Dear BiddersPlease find below answers to clarification Q1- Below: A.  We noticed that the power transformer and 33kV metal-clad switchgear are listed twice in both the BoQ for Lot 1 and Lot 2. According to your drawings, we only need one 4 MVA power transformer and one 33kV metal-clad switchgear. Could you please clarify this?B. We noticed that the power transformers are listed twice in both the BoQ for Lot 1 and Lot 2. With difference details According to your drawings, we only need 4 MVA step-up power transformer Dyn11 not Ynynd . Could you please clarify this?C. We found that the transformer details for the MV station unit are repeated with different specifications in the BoQ for Lot 2, item No. 5.1. It mentions a Dyn11 two-winding step-up transformer and a Tertiary Dynyn three-winding transformer, but according to the drawings, it is a step-down Tertiary transformer. Additionally, the technical questionnaire specifies a Dyn11 two-winding step-down transformer. Could you please clarify this?D. In the BoQ for Lot 2, the 33kV switchgear for the MV station unit states a breaking capacity of 20 kA for 1 second, while the technical questionnaire notes it as 31.5 kA for 1 second. Could you please clarify this discrepancy?Ans 1 - (For other quetion ) - Please adhere to all specifications, drawings and BoQ contained in the tender documents.Q2 - Lot 3 C1 - Item 2.17Please specify the type or specifications of the insulation.Lot 3 C1, C2 - Items 2, 3, and 4  Please provide the quantities for each item.Ans 2 - Please adhere to all specifications, drawings and BoQ contained in the tender documents.Q3- Thank you for your response regarding the drawing "Sign and Stamp." I would like to confirm whether the same procedure applies to the Scope of Work — specifically, should we also stamp and sign the statement "We reviewed the documents and we stamp and sign"?Ans 3 - Yes please sign and stamp Additionally, we would like to request a field visit to identify any obstacles and assess all work needed for accurate pricing. As you mentioned during the meeting, we also need to coordinate with you and the Ministry of Water and Environment. Could you please advise on the process for arranging this coordination?- Ans - UNOPS will not arrange any visits or coordinate site visits to the site , if the bidder is intreasted they may conduct site visits rerferance to the coordinance in shared tender documents. Due to the large volume of information, drawings, and BoQs, we respectfully request an extension to the submission deadline. I am writing to ensure that our request is considered along with the other contractors who have also requested extensions.- Extension is already granted Furthermore, we kindly request more details regarding the monitoring system, specifically the connection between the kW meter and the data logger, and the required method of meter data retrieval (whether remotely or stored and accessed manually).Ans - Please adhere to all specifications, drawings and BoQ contained in the tender documents.kindly We recommend and formally request approval to use a SCADA system, and to update the BoQs accordingly. Alternatively, we can use a MODBUS/RTU meter. Please note that the MODBUS/RTU meter does not have a screen; it transmits data to a central data manager for reading. However, we can install a display screen to provide manual data access if required. Dear SirAns - Please adhere to all specifications, drawings and BoQ contained in the tender documents.Q4- * in main distribution board For Technical questioner you mention you need 4 variable Frequency Drive. But Quantity of pumps 3.*item 8 in Technical Questionnaire Double flange Butterfly valves not mention in BoQ,* item 8.2.5 Swing check value not mention gate valve.*Item 8.3.5 Double Flange swing check valve Not mention in Boq the diameter, flow meter *Flow meter. * item 9. 14^  you mention in Technical questirumaine Rate diameter DN500, DN 400 and in the BOQ DN 150 and DN 250.* item  10.1 water Hammer / Surge protection System not mention In BoQ.* in BoQ C2 item 17 Automatic Air valves Not mention diameter. *In BOQ-C1 item 17 Automatic Air valves not mention diameter.please clarify. Ans - Please refer to the detailed drawings which illustrate this and single line diagram SLD Drawing are mention need 4 variable Frequency Drive on of them is a spare as shwing in the single line diagram of drawing of the tender documents. - For item 8 in Technical Questionnaire Double flange Butterfly valves an amendment will be made and added to the BoQ and you will be notified of it later.- For the Flow meter. we will make an amendment will be made and added to the in Technical questirumaine diameter DN150 and DN250.- Regarding the water hammer issue, the charge is discharged through pipes to the collection tank, as shown in the drawings and the BoQ.- for the Automatic Air valves not mention diameter 3".we will make an amendment 

New clarification added: Dear Bidders Please find below answers to clarification Q1- LOT 3, as per the BOQ C1&C2​ item 3 - "Supply, install, test and commission complete for the heavy-duty and paint a high quality rust-resistant epoxy material paints for all with uniform coverage of all out let PLI grrade X52 steel pipe work.Please advise the standard, thinkness & type as it not clear in BOQ, scope or drawings ??Ans - Please adhere to all specifications, drawings and BoQ contained in the tender documents.Q2- We seek clarification on the following discrepancies in BOQ C1 & C2 (LOT 3) regarding Items 14, 16, and 17:1. BOQ C2 – Mismatch Between Working Pressure (Class 300) and Flange Rating (900# RF)Description: Items 14, 16, and 17 specify Working Pressure = Class 300 but require Flanged End Connection: ANSI B16.5 900# RF.request:Is the flange rating (900# RF) intentional despite the lower Class 300 working pressure?2. BOQ C1 – Missing Flange SpecificationDescription: The same items (14, 16, 17) in BOQ C1 list Working Pressure = Class 300 but do not specify the flange connection type.request:please advise the type and the sizeAns - Please adhere to all specifications, drawings and BoQ contained in the tender documents.Q3- Regarding the received specs ( LOT 01 3-0 PV DIESEL ) ; Kindly be noted that there is conflict between received specs and BOQ regarding rating voltage as specs specify 15 kv while BOQ specify 11 kv & 12 kv & 36kv so please advise ?Ans - Please adhere to all specifications, drawings and BoQ contained in the tender documents.Q4- LOT 01 - 4-9 -Drawing FUEL TANK (- drawing FL-04 )Is showing there are 6 Turbine Flow meter whereas the BOQ only mention 2 , Kindly advise ?Ans - Please adhere to all specifications, drawings and BoQ contained in the tender documents.Q5- With reference to LOT 2 (33KV Transmission Line 2), BOQ Item 6.1 specifies the use of 15m wooden poles. However, based on the site location, geographic conditions, and environmental factors, we recommend using 11m or 12m stout/medium poles as a more suitable alternative. To ensure compliance with safety and quality standards, we will submitt upon awarding the following :Submit detailed structural profiles of the proposed poles.Provide sagging calculations to verify the integrity and reliability of the 33KV line.Kindly confirm your approval?Ans - Please adhere to all specifications, drawings and BoQ contained in the tender documents.Q6- We require you to extend the tender deadline as it needs study and the project is big and we need to send all requirement to the factory, in order to meet all your requirements .- Tender already extended Q6- We require you to extend the tender deadline as it needs study and the project is big and we need to send all requirement to the factory, in order to meet all your requirements .- Tender already extended Q7 - We request to extend the deadline for closing date it need more time as per request the companiesWith high respect and appreciation- Tender already extended 

New clarification added: Dear Bidders Please find below answers for ClarificationsQ1 - LOT 3 ,  In the tenchicnal questionnaire section 8.2 Gate Valves , 8.2.5 & 8.2.6 mentioned as the Double Flange metal-seated rising stem Gate valve and as cast steel swing Check valves, we think it is typo and section is refer to the Gate valve, please confirm.?In the BOQ item 5,6,7,8 & 9 PN16 Double flange Handwheel-operated Gate Valve has no Techincal specs or furhter details in the tenchicnal questionnaire, please proved us with techincal details ?Drawing 4-2 & 4-3  (P & I DIAGRAM ) does not show the Pressure class ( 300, 900 & PN 16 ) and also does not show the outet water hammar line location., kindly advise?Ans 1 - Answers Below: Please adhere to all specifications, drawings and quantity schedules contained in the tender documents.Q2- Greetings! We kindly request that you extend the project duration by at least 10 days, given the extensive details in the tender, which require sufficient time to study and submit a compelling proposal.Ans 2 - Extension has been granted. Q3 - Below: 1-We noticted in the document  (ALL LOTS - Small Works - 6 Solicitation - RFQ 04 Sections II, III, IV, V) section Returnable Schedule 0.5: Format for Resume of Proposed Key Personnel and Returnable Schedule 4.4: Key Personnel ) A sentence says (Applicable upon request) is that means we just have to provide  ‏‏ A confirmation letter to provide the required key personnel upon request or we have to Submit the proposed team during the tenderAns 1 - Confimration letter that you will provide the team once required in case you were awarded.  2-could you please extend the tender and the clarification timeAns 2 - Extension has been granted.  

New clarification added: Dear Bidders Please find below answers to clarification Q1 - Below : For the main cable building, could you please clarify what is under the ground beams?The specified thickness of the tank in the plan is 8 mm, whereas the quantity table indicates a different measurementLot 1, Item 2.8.3: Is there a detailed specification available?and could you please extend the deadline and the clarification period? This tender is extensive and requires meticulous study.Ans 1 -  Below : - Please adhere to all specifications, drawings and quantity schedules contained in the tender documents.Tender already been extended 

New clarification added: Dear Bidders Please find below answers to clarification Q1. After reviewing the documents for LOT 3, we noticed that the generator item is not included in the LOT 03 -5 Technical Questionnaire. Could you please confirm whether the generator is not required for filling out its specifications on this Technical Questionnaire?Additionally, as you are aware, the lots include a substantial number of materials, many of which require significant time to obtain quotations from the respective factories. Therefore, we kindly request an extension of the tender submission deadline by at least three weeks to ensure we can prepare a complete and competitive offer.Ans 1 -  For this topic, we will make an amendment to Questionnaire and a special table will be added for the generator.Q2. We kindly request you to extend the bid submission at least 2-3 weeks excludingthe Eid Hoildays due to the following reasons:Q1-  We have amany inquiries and we still waiting the feedback from the manufacturers to send you all clarifications at once .Q2- The project is very big and the deadline and clatrification period is very small .Q3- we need more time to study the tender docments well .Ans 2 - Extension has been granted Q3 - We kindly request for an extension of two weeks.Ans 3 - Extension has been granted  

New clarification added: Dear Bidder Please find the Clarifications for below questionsQ1 - The manufuture have inquire some information miss which need to complete the offer 33kv metal clad sf6 switchgear we need the SLD and the more technical requirement Switchgear system 11kv Technical requirements  4 mva 11/33 /step up power transformer need SLD and. technical requirements  Ans 1 - Please refer to the detailed drawings which illustrate this and SLD are included in the tender documents.Q2 - We have some clarification for Lot 3 : Q 2.1- In main distribution board For Technical questioner you mention you need 4 variable Frequency Drive. But Quantity of pumps 3.Ans 2.1 - Please refer to the detailed drawings which illustrate this and single line diagram SLD Drawing are mention need 4 variable Frequency Drive on of them is a spare as shwing in the single line diagram of drawing of the tender documents. Q2.2 - Item 8 in Technical Questionnaire Double flange Butterfly valves not mention in BoQ,Ans 2.2 - For item 8 in Technical Questionnaire Double flange Butterfly valves an amendment will be made and added to the BoQ and you will be notified of it later. Q.2.3 Item 8.2.5 Swing check value not mention gate valve.Ans 2.3 - For the Flow meter. we will make an amendment will be made and added to the in Technical questirumaine diameter DN150 and DN250. 2.4 Item 8.3.5 Double Flange swing check valve Not mention in Boq the diameter, flow meter Ans 2.4 answer as above  Q2.5 - Flow meter. * item 9. 14^  you mention in Technical questirumaine Rate diameter DN500, DN 400 and in the BOQ DN 150 and DN 250.Ans 2.5 - answer as above  Q 2.6 - Item  10.1 water Hammer / Surge protection System not mention In BoQ.Ans 2.6 - Regarding the water hammer issue, the charge is discharged through pipes to the collection tank, as shown in the drawings and the BoQ. Q.2.7 - In BoQ C2 item 17 Automatic Air valves Not mention diameter. Ans 2.answer as above Q2.8 - In BOQ-C1 item 17 Automatic Air valves not mention diameter.Ans 2.8 - For the Automatic Air valves not mention diameter 3".we will make an amendmentQ3 - Could you please advise  the quantity of Item 6.1.1 ( AC Power Cable - 4x25 sqr.mm) in Lot 1, as it has not been specified in the Bill of Quantities (BOQ).Ans 3 - Please adhere to all specifications, drawings and BoQ contained in the tender documents.Q5 - We seek clarification on the following discrepancies identified in LOT 3:Flow Meter Diameter ConflictThe BOQ (Items 20 & 21) specifies Double Flanged Intelligent Electromagnetic Flow Meters with rated diameters of DN 150 & DN 250.However, Clause 9.14 of the Technical Questionnaire references diameters as DN 400 & DN 500.Request: Kindly confirm the correct rated diameters ?PRV Installation DiscrepancyThe mechanical drawing No. (MC-02) illustrates Pressure Relief Valves (PRVs) installed on each pump.This is not reflected in the BOQ or P&ID drawings.Request: Please confirm whether PRVs are indeed part of the scope ?Ans 5 - For flow meter an amendment will be made and you will be notified of it later. 

New clarification added: Dear BiddersPlease find below answers to clarification Q1 - We have an inquiry regarding the CCTV system about the max frame rate of the PTZ  (4mp) CCTV camera. The max frame for the  4mp that you requested is 3840*2160@20fps, however the company that gave us an offer said that this value is not correct. They said the 4k 3840*2160@fps comes for 8mp and not 4mp.  Please check the correct value and update us.Ans 1 - Please  adhere to the specifications and BoQ contained in the tender documents.Best Regrads 

New clarification added: Dear Bidders Please find below answers to clarification  Q - I hope you are doing well; kindly find below my observations:Topography survey is not provided within tender documents.On-site Topography survey is critical to evaluate the slopes percentage in E-W and N-S and identify the quantities of cut & fill.Google earth topography will not be sufficient, as per google earth image, land seems to have small hills, close to each other.LOT01-1-1-Scope of work – Table 01: Client has mentioned the requested capacity of the hybrid system to be 1.87 MWp, however, the drawings show 3072 No’s of 710 Wp modules, which is equivalent to 2.18 MWp, we need to clarify clearly the required capacity.Client has provided BOQs & drawings with details for module mounting structure – Are we constrained to follow the shop drawings and BOQs, or we can propose an alternative solution?Client has identified Masonry wall in Southern Side, the purpose is to do backfilling in Southern side in order to level the land with the highlighted slope in drawing (which is 5%), are we obligated to follow the drawings?Ans - Surveying the project site is indeed a critical component of the project. The applicant must take into account that re-surveying is the contractor's responsibility by submitting implementation drawings under the supervision of the supervising authority. Slope adjustment calculations have been made, including concrete retaining walls, as shown in the drawings for LOT-01The solar panel quantities, capacities, and efficiencies are fully relied upon as stated in the bill of quantities.Please implement the solar panel installation structure in accordance with the specifications, drawings, and bills of quantities, while fully adhering to the details of the solar panel installation structure.Please  fully adhere to implementation in accordance with the drawings, specifications and BoQ schedules.Please  fully adhere to the issue of treating slopes by implementing concrete barriers in accordance with the drawings and specifications contained in the tender documents.

New amendment added #2: Amendment 2\The purpose of this amendment is toExtend the tender Deadline to 2025-06-30 09:00 UTC (12 noon Yemen Tim)Extend tender Deadline for clarifications to 2025-06-23 09:00 UTC (12 noon Yemen Tim)Therefore the esourcing general tab is amended to read as followsDeadline: 2025-06-30 09:00 UTC (12 noon Yemen Tim)Deadline for clarifications: 2025-06-23 09:00 UTC (12 noon Yemen Tim)All other terms and conditions remain the same 

New amendment added #1: The purpose of this amendment is:Upload the prebid meeting minutes. Extend the deadline for clarificationsExtend the deadline ​Therefore please note the following changes in esourcing tabs:Esourcing - General tab to read as Deadline for clarifications *  04 June 2025''Esourcing - General tab to read as '' deadline 16 June 2025''  Esourcing - Document tab to add Prebid Meeting - Prebid Meeting -  RFQ-2025-57485 - LaboosAll other requirments remain the same with no change. 

New clarification added: Dear Bidders Please find below answers to clarification Q1 As you know, the project is huge and has many pieces of equipment and very sensitive technical specifications. We need to extend the tender as much as you can so we can provide you with the same specifications you requested.Ans 1 - In case of any extension the extension will be posted as an amendment in the e-sourcing platform.Q2 We respectfully request an extension of the tender deadline. This is a significant tender, and we need at least three more weeks to prepare a competitive and comprehensive bid. Thank you for your consideration. I trust you are doing well Ans 2 - In case of any extension the extension will be posted as an amendment in the e-sourcing platform.Q3 - Regarding the Vendor Submission section, specifically the Document Checklist for LOT1, LOT2, and LOT3, could you please clarify what type of project drawings you require? Additionally, You provide a scope of work, would you like us to review and update it according to our submission?Ans 3 -  Each lot has its drawing labled the supplier is required to signed and stamp on each of the drawing to confirm they have reviwed the docuements and this is to be submitted under the checklist item of drawing for each lot. 

New clarification added: Dear Bidders Please find below answers to clarification Q1 Regarding the Vendor Submission section, specifically the Document Checklist for LOT1, LOT2, and LOT3, could you please clarify what type of project drawings you require? Additionally, You provide a scope of work, would you like us to review and update it according to our submission?Ans 1 - Each lot has its drawing labled the supplier is required to signed and stamp on each of the drawing to confirm they have reviwed the docuements and this is to be submitted under the checklist item of drawing for each lot.  

New clarification added: Dear Bidders Please find below answers to clarification Q1 Could you please share the topographic survey and, if possible, the soil investigation report for the PV site?Ans 1 - Please refer to the Drawings   LOT 01 - 4-1 -Drawings General Layout DRAWING NO:  G-02.  comments , and the LOT 01 - BoQ - A-PV. BoQ no 2-ARCH & CIV  item No 1.1 and 1.2 .Field confirmatory tests of the soil bearing capacity as well as any other geotechnical assumptions of each structure have to be confirmed under the supervision of the UNOPS Field Engineer and logged into the daily site log and report. Any deviation from the designed soil-bearing capacity has to be referred back to the respactiveUNOPS autharity  for approval.

New clarification added: Dear Bidders Please find below answers for Clarifications: Q1 - An extension of three weeks for the submission deadline and an additional two weeks for the clarification period due to the short time frame and the need to gather necessary materials. We believe this extension will enable us to prepare a more thorough and competitive proposal? Ans 1 - In case of any extension the extension will be posted as an amendment in the e-sourcing platform.Q2 We require you to extend the tender as it needs study and the project is big so we prepare and submit the request proposal according to your requirements . Ans 2 - Please refer to answer Q1.