National Hydroelectric Power Corporation Limited has published Exploration And Collection Of Core For 2 Nos Exploratory Core Drilling Holes By Triple Tube Core Method At Dt Inlet Near Chandey Village In Dam Site Of Teesta-Iv He Project . . Submission Date for this Tender is 27-04-2021. Core Drilling Tenders in Teesta-IV HE Project, Tikzap, Tingchim Sikkim. Bidders can get complete Tender details and download the document.
| Sr No | CorrigendumDate | Corrignedum | CorrigendumType | NewSubmissionDate |
| 1 | 23-Feb-2021 | Bid Auto Extn Corrigendum | Bid Auto Extn Corrigendum | 02-03-2021 |
| 2 | 27-Feb-2021 | Change in Date | Date | 16-03-2021 |
| 3 | 18-Mar-2021 | Corrigendum2 | Date | 06-04-2021 |
| 4 | 10-Apr-2021 | Corrigendum3 | Date | 27-04-2021 |
| Name of Work : Exploration & Collection of core for 2 nos exploratory core drilling holes by triple tube core method at Dt inlet near chandey Village in dam site of Tessta-IV HE project. | |||||
|---|---|---|---|---|---|
| Sl. No. | Item Description | Item Code / Make | Quantity | Units | |
| 1 | 1 | Exploratory core drilling in triple-tube core barrel method SX (150 mm)/ PX/ HX/ NX size hole in all kind of over burden soil formation upto a maximum depth of 30 m or upto refusal, whichever is encountered earlier including collection of undisturbed samples from cohesive soil only as per relevant IS Code. | Make 1 | 60 | m |
| 2 | 2 | Exploratory core drilling by triple-tube core barrel method HX/ NX/ BX size hole in refusal strata/ rock formation upto a maximum depth of 35 m as per relevant IS Code.\n(a) Ground level to 35 m | Make 2 | 10 | m |
| 3 | 3 | Carry out in-situ permeability test in over burden soil formation at 1.5 m interval by constant head/ falling head method as deemed suitable at site as per IS 5529 Part-I. | 40 | m | |
| 4 | 4 | Carry out in-situ permeability test in rock formation at 3 m interval by constant head/ falling head method as deemed suitable at site as per IS 5529 Part-II. | 4 | m | |
| 5 | 5 | Construction of platform for drill holes 02 nos. at DT Inlet and shifting of machines with its accessories from road head, Chandey to drill hole location at diversion tunnel inlet area, Teesta-IV HE Project, North Sikkim. | 1 | m | |
| 6 | 6 | Manual shifting of drilling machines along with its accessories from road head, Chandey, EL+_900M to proposed location of drill hole at DT Inlet area, EL+_720M on head load (Up & Down 2 nos.). | 2 | m | |
| 7 | 7 | Transportation of drilling machines by mechanical means from right bank, Sherwani, East Sikkim to Chandey village, Mangan, North Sikkim. | Make 38 | 2 | job |
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