Addendum No. 1


            This Bid Bulletin is issued to inform prospective Bidders of some changes and/or modifications introduced by the Bids and Awards Committee for the requirements “One unit Trailer Mounted Diesel Hydraulic Rig (26 HP KOHLER) and Three Lots Various Construction Materials” for the use in the Construction & Installation of Deep Wells, provincewide,  province  of Negros Oriental (T-129-2011, ABC P1,306,345.00)”.  This shall form an integral part of the Bid Documents.


Notice is hereby given of the detailed technical specifications for Item No. 1 “Trailer Mounted Diesel Hydraulic Rig 26HP”, viz:


Model #KD 2600 or its equivalent

26 HP Diesel Hydraulic Trailer Rig, New 2010

Maximum Depth 400 ft.

Trailer/Platform, with Lights and Certificate of Origin

2” Ball Hitch, Safety Chains

26 HP Diesel, Electric Start Electric Ignition,

Fully Adjustable Mast, Hydraulic Powered

(4) – 7500 LB Platform Stabilizers 3500lbs Single Axle

Heavy Duty 15” Wheels & Tires

Storage Box for Drill Stem, Bits

Hydraulic Motor Torque 4160 in.lbs, Hydraulic Pump 28 to 40 GPM, 2 Stage

Mast 8’2” – upright

Length of Cylinder Stroke 60”

Pull-Up Capacity: 3000 lbs down pressure: 3000 lbs

Hydraulic Reservoir Capacity, 36 Gal. with intake & Return Filters

3 Way Valve Controls with Pressure Relief

Drilling instruction manual

Swivel:  Rated 760 PSI, High Volume, and Tool Steel Shaft, Roller Bearing Guides

Drill Stem:  200 ft high strength reinforced Drill Rod (M50)

Drill Bits:  3 Bits Carbide Tipped (4” 6” 9”)

Mud Pump:  Diesel Electronic Ignitions, Carbon Seal, Portable on Wheel

Pressure Hose:  200PSI with Double Bypass Gate Valves,

Suction Hose:  2” with Strainer

Slip Plate Mounted on top and bottom of rig.  Hydraulic break out


CORRECTIONS: 1) DELETE the word “KOHLER” in the title of the project

                             2) ADD the words “BRAND NEW” in the title of the project


Bidders are enjoined to take note and consider the following changes in the preparation of their bids. 


For the information and guidance of all concerned.




Chairman, Bids and Awards Committee