Tenders Are Invited For Borehole Drilling, Equipping And Rehabilitation Works Of Modogashk Water Supply

Tenders are invited for Borehole Drilling, Equipping and Rehabilitation Works of Modogashk Water Supply The works involves but not limited to the following, a) Drilling, development and test-pumping of 140m deep borehole b) Borehole Equipping -solar powered pumping unit c) Rehabilitation and equipping of 1No. Infiltration gallery d) Piping -HDPE PN12.5 - 90mm dia -1.0Km and 63mm dia-0.75kme) Fencing 1.00 BILL NO.1: -PRELIMINARIES AND GENERAL ITEMS 1.01 Mobilization and demobilization of drilling machinery, personnel and equipment. Include for camp setting. Include for Project sign Board installation Item 1.02 Provide and fix Project sign Board include for branding of Tank, kiosks and Generator house as directed by the project Engineer. 1.03 Provision and Supply of PPEs for workers to meet EMMP.( Reflectors, Helmets, safety boots). Include for county supervising team) LS 1.04 Provide for acquisition of Authorization and drilling permits from Water Resources Authority (WRA). Including acquisition of No consent letter from respective Water Resources Users Association (WRUA) PS 1.06 Allow a provisional sum of Kenya shillings Three hundred Sixty Thousand (Kshs 360,000) to be utilized in Project Community Management Training as directed the Project Manager Ls 360,000.001.07 Allow for project management and supervision Ls 1 360,000.001.08 Allow for contract profits in item (1.06&1.07) % .% TOTAL BILL 1:- carried to summary 2.00 BILL NO.2:-REHABILITATION OF INFILTRATION GALLERY WELL AND EQUIPPING 256 Item No. Description Unit Qty Rate (Kshs) Amount(Kshs)A Rehabilitation of shallow well 2.01 Clear site of all bushes and debris. Grab up roots and burn the arisings M2 450 2.02 Excavate/Disilt of existing shallow to depth of 1200mm 9m. Cost to include unclogging /disilting of collector pipes M3 22 2.03 Load, wheel and cart deposit and spread surplus excavated material where directed on site at a distance not exceeding 100m. M3 22 2.04 Provide and install culverts 1m, 1.2mm dia. No 4 2.05 Allow for De-watering, flushing and unclogging of drain/ collector pipes LS 2.06 Allow for 24hrs test pumping for the two wells Ls 1 2.07 RCC well covers circular in plan specs:- 1.5m dia. 200mm. D12 bars @150mm c/c herically. No 1 2.08 Allow for rehabilitation of existing protection wall and construction of Lockable well chamber 3.5mx3.5m x 1m No 1 TOTAL 1:- Carried to summary B SHALLOW WELL EQUIPPING 2.09 Provide and fix a submersible pump complete coupled with Motor capable of delivering minimum 3m3 /hr against a head 60m. No. 1 2.10 4 core submersible cable 10mm2 M. 120 2.11 1.0mm2 dual londex cable M. 120 2.12 UPVC 2" standard borehole pipes No. 2 2.13 1.5mm2 underground sensor cable M. 10 2.14 Armored/underground cable 4 core 6mm2 M. 20 2.15 Earth rod 1.2m No. 1 2.16 TP N Fuse-20A No. 1 2.17 Adaptor set 2" No. 1 2.18 Convection controller-2.2KW 3Phase No. 1 2.19 Splicing kit No. 1 257 Total installation for one well Summary A Rehabilitation of shallow well B Shallow Well Equipping TOTAL SHALLOW WELL REHAB+EQUIPP Item No. Description Unit Qty Rate (Kshs) Amount(Kshs)A BILL NO 3: -BOREHOLE DRILLING (MUD DRILLING) Include for provision of foam, polymer solution and bentonite powder to achieve required bore depth and diameter as required 3.01 Drilling depth from 0 but not exceeding 100.0 metres for the conductor pipe -350mm internal Diameter. M 100 3.02 Drilling depth from 0 but not exceeding 100.0 metres for the conductor pipe -300mm internal Diameter. M 140 3.03 Sampling and logging works at 2.0m intervals No. 70 INSTALLATION OF CASINGS and SCREENS AND GRAVEL PACKING 3.04 Provide for installation of 12 inches (300mm) diameter surface plain casing to stabilize hole on top formation M 40 3.05 Provide for installation of 10 inches (250mm) diameter plain/permanent casing M 60 3.06 Ditto 250mm internal diameter steel screens, 4mm thickness class B - plasma slotted. M 80 3.07 250mm internal diameter slide - in borehole cap No. 1 3.08 Supply and gravel pack the borehole:- Gravel Specs- quartz pea gravel, 2-4mm grain size Ton 12 3.09 Provide 1.2mx1.2mx2m deep concrete borehole plinth (finished slab) (1:2:4) and sealing off/protecting the hole from surface pollution m3 3 BOREHOLE DEVELOPMENT 3.10 Physical development through air-jetting techniques HR 12 258 3.11 Chemical development through Calgon injection. KG 20 AQUIFER TESTING (TEST PUMPING & WATER QUALITY ANALYSIS) 3.12 Mobilization and demobilization of test pumping unit Item 1 3.13 Installation of test pumping unit & removal. Item 1 3.14 Testing (Pumping Test) (Pre-test, step and/or constant drawdown/discharge tests) HR 24 3.15 Testing (Recovery Test) HR 6 3.16 Water sample for chemical & physical analysis LS 1 3.17 Processing of Borehole Completion report, borehole serial number, water quality lab analysis and report. No. 1 SUB-TOTAL =(Carried to summary) B BOREHOLE PROTECTION 3.18 Borehole protection: Provide and fix Gabbion boxes 1.5m protection surround. The boxes should be packed with hard silt free approved rocks and packed as directed by the Engineer. Cost to include necessary excavation. M 10 3.19 Construct 1200mm x1200mm x 1000mm Borehole chamber with lockable cover No. 1 Total Cost of Borehole Protection COST BOREHOLE DRILLING AND PROTECTION ITEM NO. DESCRIPTION AMOUNT(KSHS)A Borehole drilling B borehole protection Total Borehole Drilling &Protection:- Carried to summary ITEM NO. DESCRIPTION UNIT QTY RATE(KSHS) AMOUNT(KSHS)BILL NO.4:- BOREHOLE EQUIPPING 259 4.01 Provide and fix a suitable approved submersible pump coupled with 5.5KW Motor capable of delivering minimum 10m3 /hr against a head 150m. No. 1 4.02 4 core submersible cable 10mm2 M. 120 4.03 1.0mm2 dual londex cable M. 120 4.04 UPVC 2" std borehole pipes No. 43 4.05 Borehole cover 6"x 2" No. 1 4.06 Airline pvc pipe 25mm No. 60 4.07 1.5mm2 underground sensor cable M. 160 4.08 Armored/underground cable 4 core 10mm2 M. 30 4.09 545w solar modules No. 15 4.10 Earth rod 4ft No. 1 4.11 P.V disconect 1000vdc 40A No. 1 4.12 Adaptor set 2" No. 1 4.13 Sunverter 3 7.5kw controller No. 1 4.14 3m structure for 15, 545w solar panes L.S 1 4.15 Splicing kit No. 1 -4.16 Lightening arrestor L.S 1 4.17 Installation sundries L.S 1 Tender Link : https://www.isiolo.go.ke/tenders

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Global Tender Document	84b9d4af-d57f-4e87-9c57-03daef98946e.pdf