Republic of the Philippines DEPARTMENT of PUBLIC WORKS and HIGHWAYS CAVITE SUB-DISTRICT ENGINEERING OFFICE REGIONAL OFFICE IV-A Carmona, Cavite

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Republic of the Philippines DEPARTMENT OF PUBLIC WORKS AND HIGHWAYS CAVITE SUB-DISTRICT ENGINEERING OFFICE REGIONAL OFFICE IV-A Carmona, Cavite

GEOTECHNICAL/GEOLOGICAL INVESTIGATION (TEST PIT / CBR) FOR ROAD PROJECTS

1. GEOTECHNICAL INVESTIGATION

To conduct California Bearing Ratio (CBR) investigation works for the following projects. 1. Salawag-Paliparan Road (K0033+051 – K0033+455, K0033+455 – K0033+ 716, K0033+716 – K0033+967, K0033+967 – K0034+090, K0034+090 – K0034+236, K0034+236 – K0034+352, K0034+352 – K0034+464) 2. Dasmariñas – Carmona Road (K0035+043 – K0035+112, K0035+170 – K0035+951, K0036+052 – K0036+178, K0036+920 – K0037+210) 3. Sta. Rosa-Ulat-Tagaytay Road (K0061+(-020) – K0061+341) 4. Cavite Batangas Road (K0042+954 – K0044+450) 5. Marcos Alvarez Road (Chainage 0 to Chainage 1396) 6. Manila-Cavite (NCR Bdry-Jct. Cavite City Sect) (K0015+(-175) – K0061+341)

The purpose of the conducting California Bearing Ratio (CBR) investigation work is to provide technical information needed to prepare an engineering design of the road pavement

1.1 SCOPE OF WORK

The cosultant shall provide all the labor, instrument/equipment, materials and supplies, vehicles, bunkhouses, etc., necessary to perform satisfactorily the geotechnical investigation works herein required, viz:

1.1.1. Soil Boring(with soil log/layer diagram)/Test Pitting 1.1.2. CBR Tests 1.1.3. Detailed Soil Investigation 1.1.4. Soil Bearing Capacity for the sections with possible construction of slope protection, box culverts and other structures.

1.2. SCOPE OF GEOTECHNICAL INVESTIGATION

1.2.1. The Consultant shall be responsible for carrying out the necessary geotechnical soil investigation works in respect of the projects cited above.

1.2.2. During the conduct of Geotechnical and Geological Investigations, the Consultant shall coordinate with the DPWH, Cavite Sub-District Engineering Office, particularly on geotechnical / geological requirements stipulated in the DPWH Design Guidelines, Criteria and Standards, Terms of References for Consultancy Services for the Geotechnical/Geological Investigations (TEST PIT/CBR)

Page 2 of 17 Volume 1-Part 1, Surveys and Investigation Manual on Technical Requirements for Surveying and Investigation of Public Works and Highways Projects and applicable provisions of existing laws, codes or Department Orders, to minimize changes / modifications in the design plans, substitution of materials / methods and unnecessary delays in the preparation of final plans and estimate / quantification.

1.3. THE SERVICES FOR THE GEOTECHNICAL INVESTIGATION

1.3.1. The Consultant’s Services shall be limited to the following:

1.3.1.1. Field geotechnical survey – Field geotechnical survey shall be conducted to gather the necessary data to undertake the pavement design. This shall include site investigations and tests (soil and pavement strength).

1.3.1.2. Laboratory testing – Laboratory testing will be conducted on retrieved soil samples and related materials.

1.3.2. Soils and Materials Investigation

Carry out detailed soil investigations along the road alignment to identify the various soil types. It should not only be limited to the centerline and edge of the pavement but also included side cut sections affected by the widening.

Auger borings and test pits shall be made/located alternately at the centerline (in case of new alignment) and edge of the road (for existing and paved road) at an average interval of 250 meters and 500 meters, respectively or at lesser intervals if required in the judgment of the Consultant. For areas of light cut and fill where there are no special problems, the exploration shall extend to a maximum depth of 1.5 meters below the proposed subgrade. Where deep cuts are to be made, such as large embankment across the marshland or subsurface information that indicate the presence of weak layers, the depth shall depend on the topography and nature of the subsoil.

All pits and boreholes shall be properly logged showing the thickness of each layer, the color, the type and visual description of each layer, depth below the surface, water levels (if any), etc. These samples will be subjected to the following tests:

Mechanical Analysis, Specific Gravity, Atterberg Limits, Moisture-Density Relationship, CBR and Natural Moisture Content. Classification of soils shall be made in accordance with AASHTO M145.

In-situ CBR tests should be carried out where overlays or rehabilitation is being proposed without reworking/re-compaction of any remaining pavement layers including the subgrade layer.

1.3.3. Geotechnical and Geological Survey Investigations

Terms of References for Consultancy Services for the Geotechnical/Geological Investigations (TEST PIT/CBR)

Page 3 of 17 Detailed geotechnical and geological survey shall be carried out along the proposed /existing road project road.

The Consultant shall coordinate with the Cavite Sub District Engineering Office during the conduct of geotechnical and geological surveys and investigations along the entire alignment of each road section, specifically at locations with observed slope failures, tension cracks, landslide scars, and areas with settlement and subsidence.

The Consultant should be able to identify areas with geological problems and difficulties, and water-bearing stratum causing subsurface discharge which could affect the stability of the roadway.

1.3.3.1. In general, the Consultant shall conduct geological survey and investigation consisting of, but not limited to the following activities:

a. Collection of geological information such as geological study reports, documents and maps for the project areas.

b. Geological mapping of the existing ground formation along the project alignment specifically at slope disaster areas by conducting site ocular inspection.

1.3.3.2. The conduct of geotechnical investigation consists of, but not limited to, the following:

a. Undertake detailed soil investigations along the road alignment with the purpose of identifying types of subgrade soils. This should not be confined to the centerline and edge of the pavement only, but include side cut sections affected by widening of RROW.

b. Test pits shall be carried out at an interval of 250 m. along the centerline of the road where traffic is greater than 300 m. vehicles per day or at 500 m. where traffic is less, in determining the CBR value to be used in the pavement design. The maximum depth of exploration for areas of light cut/fill, and deemed not to pose special problems, shall be 1.50m. below the proposed subgrade. For sections where deep cuts are involved, e.g., large embankment crossing marshland or when subsurface information indicate presence of weak strata, the depth shall be extended based on the topography and nature of the subsoil.

c. For sections where there have been observed mass and ground movements, boring shall be deep enough to provide information on materials which may cause problem to stability, settlement and drainage. Disturbed and undisturbed soil and rock samples obtained shall be subjected to physical and mechanical tests and analysis to include shear strength tests necessary for slope stability analysis. Geotechnical investigation may be carried out using inclinometers and

Terms of References for Consultancy Services for the Geotechnical/Geological Investigations (TEST PIT/CBR)

Page 4 of 17 piezometers, if necessary, at areas where ground movement and/or settlement and subsidence, have been observed.

d. All test pits and boreholes shall be properly logged showing the thickness of each layer, the color, the type and visual description of each layer, depth below the surface, depth of water level (if encountered), etc.. The following laboratory tests and analyses shall be made on the samples taken: Mechanical Analysis, Specific Gravity, Atterberg Limits, Moisture-Density Relationships, California Bearing Ratio (CBR) and Natural Moisture Content. Classification of Soils shall be made in accordance with AASHTO M145. Boring and test pits results shall be incorporated/drawn on the plans (Soil Profile).

e. The review and approval of the geological and geotechnical surveys and investigations reports/plans which shall be undertaken by the DPWH, Cavite Sub-District Engineering Office do not relieve the Consultant(s) from responsibility of determining the sufficiency and appropriateness of the geological / geotechnical investigation works including the laboratory tests and evaluation of results.

GEOTECHNICAL REQUIREMENTS FOR DESIGN BORING REQUIREMENTS FOR EACH PROJECT CATEGORY TYPE OF SPACING DEPTH PROJECT Highway Project . 250 m. interval along the . 1.5m. below the proposed centerline if traffic is >300 subgrade (light cut & fill vehicles per day (VPD) areas) . 500 m. interval if traffic is <300 . 1.5m. along the centerline VPD of existing earth roads . Boring & test pitting shall be . 2.0m. along centerline located on the areas of widening (new roads) usually below the shoulder . 100 m. along the centerline for new roads on swampy or marshy grounds

1.4. PREPARATION AND SUBMISSION OF REPORTS

1.4.1. Reporting

1.4.1.1. A final report should be submitted together with the final draft of the plans for detailed engineering.

a. Outputs Factual and interpretive geotechnical investigation report.

1.4.1.2. Reports on Investigation Results

a. The Consultant shall prepare the final report in three (3) bound copies. It shall include, but not limited to, the following:

Terms of References for Consultancy Services for the Geotechnical/Geological Investigations (TEST PIT/CBR)

Page 5 of 17

o Field Investigation and Methodology o Laboratory Testing o Vicinity Maps in scale of 1:50,000 o Final Boring Logs (1.50m – 2.00m) o Final Laboratory Tests Results (FLTR) o Borehole Location Plan in scale of 1:250 o Soil Profile along structures showing boring / drilling logs o Recommendations if called for such as type of proposed countermeasures / structures to address geological / geotechnical problems and foundation type b. Other data to be submitted o Boring logs - Job, boring, hole number, date, time, boring/drilling foreman and supervisor - Weather condition - Depth of water level - Description of soil strata encountered - Depth of soil boundaries - Size, type and depth of samples and sample number - Type and depth of in-situ test o Photographs Photographs showing the borehole drilling and sampling at each proposed sites shall be taken by the Consultant and form part of the report. The photographs to be taken shall depict the following: - Equipment used - Core drilling operation - Water level measurements - Performance of soil boring test sampling - All cores and soil boring test sample placed in core boxes - Date photographs were taken - Location or station c. The sub-surface soil exploration works including laboratory tests shall be completed within time frame upon receipt of the Notice to Proceed.

Terms of References for Consultancy Services for the Geotechnical/Geological Investigations (TEST PIT/CBR)

Page 6 of 17 GEOTECHNICAL/GEOLOGICAL INVESTIGATIONS AND SURVEY/HYDRAULIC ANALYSIS FOR FLOOD CONTROL PROJECTS

GEOTECHNICAL/GEOLOGICAL INVESTIGATION

I. PROJECT DESCRIPTION and PURPOSE: Conduct of Geotechnical/Geological Investigation for the following projects:

1. Construction of Box Culvert along Bacoor River, Habay II, Phase I, Bacoor, Cavite 2. Construction of Box Culvert along Brgy. Maliksi 2, Bacoor River, Phase I, Bacoor, Cavite 3. Construction of Box Culvert along Brgy. Panapaan 3, Bacoor River, Phase I, Bacoor, Cavite 4. Construction of Retaining Wall / Revetment / Slope Protection along Carmona River (Daromar Bridge to Milagrosa Bridge), Brgy. Mabuhay, Carmona, Cavite 5. Construction of Retaining Wall / Revetment / Slope Protection along Carmona River (Mag-asawang Mangga), Brgy. Mabuhay, Carmona, Cavite 6. Construction of Retaining Wall / Revetment / Slope Protection along Carmona River (Sitio Altarez), Phase I, Brgy. Maduya, Carmona, Cavite 7. Construction of Retaining Wall / Revetment / Slope Protection along Carmona River, San Pablo St., Brgy. I, Carmona, Cavite 8. Construction of Retaining Wall / Revetment / Slope Protection along Carmona-Biñan River (Municipal Park), Brgy. Maduya, Carmona, Cavite 9. Construction of Revetment along Amuntay River, Phase II, East Side, Brgy. San Agustin II, Dasmariñas, Cavite 10. Construction of Revetment along Amuntay River, Phase III, East Side, Brgy. Zone 3, Dasmariñas, Cavite 11. Construction of Revetment along Amuntay River, Phase III, West Side, Brgy. Zone 3, Dasmariñas, Cavite 12. Construction of Revetment along Bacoor River, Phase III, Brgy. Mabolo, City of Bacoor, Cavite 13. Construction of Revetment along Baluctot River, Phase II, East Side, Brgy. Sampaloc IV, Dasmariñas, Cavite 14. Construction of Revetment along Baluctot River, Phase II, West Side, Brgy. Sampaloc IV, Dasmariñas, Cavite 15. Construction of Revetment along Baluctot River, Phase II, West Side, Brgy. Paliparan 3, Dasmariñas, Cavite 16. Construction of Revetment along Carmona-Biñan River, Phase II, Brgy. Lantic, Carmona, Cavite 17. Construction of Revetment along Sampaloc River, Phase II, West Side, Brgy. Sampaloc II, Dasmariñas, Cavite 18. Construction of Revetment along Sampaloc River, Phase II, East Side, Brgy. Sampaloc II, Dasmariñas, Cavite 19. Construction of Revetment along Sampaloc River, Phase III, East Side, Brgy. Sampaloc I, Dasmariñas, Cavite

Terms of References for Consultancy Services for the Geotechnical/Geological Investigations (TEST PIT/CBR)

Page 7 of 17 20. Construction of Revetment along Sampaloc River, Phase III, West Side, Brgy. Sampaloc I, Dasmariñas, Cavite 21. Construction of Revetment along Imus River at Brgy. Burol, Phase I, East Side, Dasmariñas, Cavite 22. Construction of Revetment along Imus River at Brgy. Burol, Phase I, West Side, Dasmariñas, Cavite 23. Construction of Revetment along Imus River, Phase II, Brgy. Real I, Bacoor, Cavite 24. Construction of Revetment along Imus River, Phase II, Brgy. Real II, Bacoor, Cavite 25. Construction of Revetment along Imus River, Phase II, Brgy. Salinas II, Bacoor, Cavite 26. Construction of Revetment along Imus River, Phase IV, Brgy. Mabolo, Bacoor, Cavite

II. LOCATION

Before the conduct of Sub-Surface Soil Exploration Works, the Consultant shall coordinate with the DPWH, Regional Office No. IV-A, for the location of the project. Borings are to be conducted at the proposed foundation location, or as close as possible if there are obstuctions that cannot be removed. The location of the coordinates shall be recorded to 0.10m accuracy (x,y,z) by global positioning.

III. SCOPE OF WORK

The contractor shall provide all the labor, instrument/equipment materials and supplies, vehicles, bunkhouses, etc., necessary to perform satisfactory the sub surface exploration herein required, viz:

A. Drilling and Sampling B. Standard Penetration Test (SPT0 C. Water Level Measurements D. Laboratory Testing and Analysis E. Preparation and Submission of Reports

I. DETAILED EXPLORATION REQUIREMENTS/SPECIFICATION

A. Drilling and Sampling 1. Location and Number

Two (2) and Three (3) boreholes, at each location shown on the plan that will be given by the Planning and Design Section, DPWH Cavite-Sub DEO.

2. Depth of borings

A) At least Fifteen (15) meters depth below riverbed or five (5) meters in bedrock/hard strata.

Terms of References for Consultancy Services for the Geotechnical/Geological Investigations (TEST PIT/CBR)

Page 8 of 17 3. Procedure

In sand, clay and silt materials, the boreholes shall be advance by the wash boring method in between sampling sections using side discharged chopping bits. Whenever necessary, N-size casings shall be utilized. The washed section shall be cleaned thoroughly before each sampling run ensuring, however, that the underlying soil is not disturbed.

Sampling shall be done at one meter interval from the river bed to hard strata using 5.0 cm. split spoon sampler. In soft cohesive layers, undisturbed ssamples using thin walled tube samplers shall be obtained hydraulically.

Core drilling shall be carried out by a diamond rotary drill method in gravelly or rock formation. Core samples shall be undertaken whenever solid formation encountered.

Cores shall be placed in core boxes arranged and labeled in accordance to depth as soon these are axtracted from the boreholes.

Drilling and sampling procedure shall comply in accordance with ASTM standards.

4. Equipment

a. Drilling Machine The Contractor shall utilized at least two (2) drilling machine and set them up at the project site. The drilling machine shall be in good working condition and shall be of such capacity as to maintain satisfactory progress of work. b. Bits The contractor shall have an sample supply of different types of bits to adopt to varying conditions. Bottom discharge and stepped bits shall also be available. c. Core Barrels Double tube swivel type core barrels in good condition and capable of obtaining maximum core recovery shall be used. d. Casing The contractor shall, at his own expense and responsibility, provide casings as required to ensure the stability of the borehole walls. The casing shall be at least of N-size an shall be in good condition. After a hole has been finished the casings shall be retrieved.

5. Handling and Core of Samples

The contractor shall provide all the materials, equipment and labor necessary for preserving samples.

B. Standard Penetration Test (SPT)

The test shall be carried out through ordinary soil encountered to the depths specified above. Standard penetration test shall be performed using 5.0 cm. (2.0

Terms of References for Consultancy Services for the Geotechnical/Geological Investigations (TEST PIT/CBR)

Page 9 of 17 in.) outside diameter split spoon sampler, driven by a 63.6 kg. (140 lbs.) hammer falling 76.0 cm. (30 in.) at 1.5 meter interval or closer if necessary.

C. Water Level Measurement

The water level shall be measured daily (before and after) whenever encountered in a borehole

D. Laboratory Testing and Analysis

The preparation of samples for testing shall be made in accordance with AASHTO. The following tests shall be made on samples obtained from boring and drilling.

1. Split-Spoon Analysis

a) Visual Soil Description b) Mechanical Analysis, AASHTO Designation T88 c) Liquid Limit, Plastic Limit and Plasticity Index, AASHTO Designation T89 and T90 d) Group Index and Soil Classification, use Unified Soil Classification System

E. Preparation and Submission of Geotechnical Reports & Analysis

The contractor shall prepare the geotechnical reports & analysis in the three (3) bound copies in a form and substance to be submitted to DPWH, Region IV-A within prescribed duration upon receipt of the Notice to Proceed. The final report shall not be limited to the following:

a) Field Investigation and Methodology b) Borehole Drilling and Sampling c) Laboratory Testing d) Final Boring Logs (BL) e) Final Laboratory Test Results (FLTR) f) Borehole Location Plan g) Soil Profile along structures showing boring/drilling logs h) Soil Liquefaction Investigation Report i) Soil Bearing Capacity j) Recommendation if called for such as type of measure/structure of work

II. OTHER DATA TO BE SUBMITTED

A. Boring Logs

1. Job, Boring, hole number, date, time, boring/drilling, foreman, supervisor 2. Weather condition 3. Depth of boring at start of day 4. Water level in casing at start of day 5. Method of penetration and flushing system

Terms of References for Consultancy Services for the Geotechnical/Geological Investigations (TEST PIT/CBR)

Page 10 of 17 6. Description of soil strata encountered 7. Depth of soil boundaries 8. Size, type and depth of samples and sample number 9. Type and depth of in-situ tests 10. Standard Penetration Test Resistance, “N” value 11. Recovery ratios of samples 12. Detailed notes on boring/drilling procedure, casing sizes and resistance to driving, description of wash water or spoil from boring/drilling tools 13. Depth of boring at end of day 14. Other relevant information such RQD, percent core recovery, angle of friction etc.

B. Photographs

Photographs showing the borehole drilling and sampling at each proposed site shall be taken by the Contractor and incorporated in the report. Photographs shall be taken at each borehole location depicting the following:

1. Equipment used 2. Core drilling operation 3. Water level Measurements 4. Performance of SPT and Shelby tube sampling 5. All cores in the core boxes, SPT and Shelby tube samples 6. Date photographs was taken

Terms of References for Consultancy Services for the Geotechnical/Geological Investigations (TEST PIT/CBR)

Page 11 of 17 SURVEY / HYDRAULIC ANALYSIS

1. TOPOGRAPHIC and HYDROGRAPHIC SURVEY

The objective of the services is to prepare the topographic and hydrographic survey plans for detailed flood control design for the following projects.

Terms of References for Consultancy Services for the Geotechnical/Geological Investigations (TEST PIT/CBR)

Page 12 of 17 24. Construction of Revetment along Imus River, Phase II, Brgy. Real II, Bacoor, Cavite 25. Construction of Revetment along Imus River, Phase II, Brgy. Salinas II, Bacoor, Cavite 26. Construction of Revetment along Imus River, Phase IV, Brgy. Mabolo, Bacoor, Cavite

1.1 SCOPE OF WORK

1.1.1 The Consultant shall be responsible for carrying out the necessary detailed topographic surveys for the various road sections for these project.

1.1.2 The Consultant shall provide all the labors, instruments/equipments like Global Positioning System, Electronic Total Station, Electronic Distance Measurement, etc., calibrated by the DENR, Land Management Bureau; materials, supplies vehicles, etc., necessary to perform satisfactorily the survey works .

1.1.3 During the conduct of topographic surveys, the Consultant shall coordinate with the Implementing Office particularly on the surveys and investigations requirements stipulated in the DPWH Design Guidelines, Criteria and Standards, Volume 1 – Part 1; Manual on Technical Requirements for Surveying and Investigation of Public Works and Highways Projects and applicable provisions of existing laws, codes or Department Orders.

1.1.4 In the preparation of plans, the Consultant shall use Computer Aided Design (CAD) software. After completion of the survey works, all electronic files of reports, plans and other relevant documents shall be turned-over by the Consultant to DPWH.

1.2 SERVICES FOR THE TOPOGRAPHIC SURVEYS

1.2.1 Common Surveying & Mapping Requirements

Refer to Chapter II, Part I, Volume I, Survey and Investigation, DPWH Design Guidelines, Criteria Standard and Manual on Technical Requirements for Surveying and Investigation of Public Works and Highways Projects and applicable provisions of existing laws, codes or Department Orders that includes but not limited to the following:

1.2.1.1 Establishment of Horizontal and Vertical Ground Controls

a. Horizontal Ground Control

Horizontal ground controls shall be established at or near an acceptable vicinity of subject project using secondary traverse precision and accuracy. Existing Bureau of Lands Location Monuments BLLM’s), Municipal Boundary Monuments (MBM), Barrio Boundary Monuments (BBM) triangulation stations within the project shall be made part of the project control. The horizontal ground controls shall be connected to the

Terms of References for Consultancy Services for the Geotechnical/Geological Investigations (TEST PIT/CBR)

Page 13 of 17 previously approved BLLM’s and/or triangulation stations or higher orders established by the National Mapping and Resource Information Authority (NAMRIA), DENR.

GPS Survey The horizontal control Global Positioning System (GPS) network in the project shall be tied to an existing national triangulation network established by the NAMRIA which is integrated to the Philippine Transverse Mercator (PTM) System. New GPS stations should be at least three (3) km interval along the acceptable location / vicinity of subject river and shall be marked with a concrete monument of dimension 40cm X 40cm X 100cm with a 10mm diameter by 100cm long steel bar embedded at the center of the monument with the following inscriptions:

GPS No. Date established Coordinates To be reflected in the plan. Elevation Name of Project DPWH-(Name of River)

Horizontal Traverse Horizontal traverse must be tied to a GPS station established in the project road. Primary traverse station shall be established using concrete monument of dimensions 20 cm x 20 cm x 60 cm with 10 mm diameter, 60 cm long steel bar embedded at the center of the monument with the following inscriptions:

Traverse Sta. No. Date established Coordinates To be reflected in the plan. Name of Project -do- b. Vertical Ground Control

A vertical ground control system shall be established for the entire project which will be connected and referred to at least three (3) existing benchmarks (BM. All elevations shall be referred to a reference datum plane, either the Mean Sea Level (MSL) or the Mean Lower Low Water (MLLW) as established by the Bureau of Coast and Geodetic Survey. In all cases, the datum plane shall be clearly indicated in the survey plans.

Benchmarks (BM) Benchmark shall be established at every five hundred (500) meters and shall be marked by a concrete monument measuring 30 cm x 30 cm x 100 cm long with a 10 mm diameter steel bar by 100 cm long embedded at the center of the monument with inscription as follows:

BM No. Date established

Terms of References for Consultancy Services for the Geotechnical/Geological Investigations (TEST PIT/CBR)

Page 14 of 17 Coordinates To be reflected in the plan Elevation in meters -do- Name of Project -do-

Intermediate Benchmarks (IBM) Intermediate benchmarks (IBM) shall be established between BM at 250 meter interval and shall be marked by a concrete monument measuring 20 cm x 20 cm x 60 cm long, with inscription as follows marked on top of the monument:

IBM No. Date established Elevation in meters To be reflected in the plan Name of Project -do-

Vertical control leveling shall have the following Accuracy Requirements:

Specifications 2nd Order Accuracy No. of wires read 3 Allowable closing error of 8.4 mm sq. root of K loops Instrument used Precise

Where: K is distance or length of line in kilometers.

Line of levels shall begin and end on previously established first order benchmark. At least two benchmarks which have not changed their relative elevations must be recovered at each end of the line and at any intermediate functions of the line with previous leveling.

River cross section survey interval

Activities Width (m) Plan and Cross Section Distance interval of Profile Interval (m) Measurement along Interval (m) the Cross Section (m) Cross Section River width 20 Straight and Uniform riverbed plus 100- uniform river formation – 10 to 20 500m stretches – 100 beyond Minor bends – 50 Abrupt change of both banks riverbed formation – 5 to 10 Sharp bends - 20 Sounding points – 20 (max) Measurement points shall include the water edge (if any) and the deepest riverbed

Right-of-way Easement/Limit

Terms of References for Consultancy Services for the Geotechnical/Geological Investigations (TEST PIT/CBR)

Page 15 of 17 The Right-of-way Easement/Limit shall be based on the Water Code of the Philippines and its IRR and to be identified/approved by the Implementing Office.

Purpose: a. For projects requiring ROW acquisition and easements; b. To document the existing/approved ROW limits; c. For use as guide in the preconstruction/as-staked survey; and d. For use as guide in the installation of ROW Boundary Markers set by DPWH Cavite Sub-District Engineering Office.

1.3 SURVEY OPERATIONS

1.3.1 SURVEY OPERATIONS & PREPARATION OF SURVEY PLANS/RETURNS

1.3.1.1 The survey operations shall commence upon the issuance of the Notice to Proceed. 1.3.1.2 The conduct of topographic survey and preparation of plans shall be undertaken/ supervised by a registered Geodetic Engineer. 1.3.1.3 The Regional Director shall designate his authorized representative to oversee and evaluate the field and office works for compliance to the herein requirements and others to be stipulated as maybe required by the Regional Director. Any recommendations, corrections or alterations required by the authorized representative on this subject survey works shall be followed accordingly. The right is reserved by this office work not consistent with the herein requirements and to incorporate other details deemed necessary but not to embraced in the herein scope of work. 1.3.1.4 Preparation of topographic survey plans The Consultant shall prepare the following plans in accordance with D.O. No. 56 series of 1995, Re: Quality of Plans.

General Requirements  Title Sheet a. Title of Project b. Layout showing the beginning and end of project

 Location Plan a. Title of the Project b. Location plan showing the adjoining towns, municipalities/barangays c. Vicinity Map d. General Notes including survey accuracy used e. Legend and symbols f. Index map g. Technical description of all controlling points

 Plans and Profile a. Project area plotted with geographic /coordinate system grid and north arrow direction b. Matchline stationing in every sheet of plans c. Indicate all topographic/physical features within the limits of survey area

Terms of References for Consultancy Services for the Geotechnical/Geological Investigations (TEST PIT/CBR)

Page 16 of 17 d. Indicate Right-of-Way e. Contour lines with elevation in meters f. Technical description of old and new established horizontal and vertical ground controls g. Name and location of natural and man-made features h. Land use classification such as rice field, coconut trees, etc. i. Reference points j. Elements of curve k. Waiver drafted in every sheet of plans l. Name, license number, signature and seal of Geodetic Engineer m. Names of signatories/approving officials in every sheet of plans

 Cross-section a. Cross sections shall be plotted by coordinates and to scale b. Stationing for every cross section as indicated in the plan

1.4 SUBMISSION AND APPROVAL OF SURVEY PLANS/RETURNS

1.4.1 The end product of this survey shall be submitted for checking, review and approval to be used on the detailed engineering design. It shall consist of the following, all of which to be included in the final detailed engineering plans:

1.4.1.1 One set of print copies (A-1 size) of the plans and cross- sections including field books, survey returns, computations and other related documents for checking/review.

1.4.1.2 Such plans & profile and cross-sections shall be subjected to joint field verification by the representatives of the approving offices concerned together with the consultants to check/verify the actual existing field condition of the project site, established horizontal/vertical ground control monuments, existing structures, etc. before the approval of the Regional Director.

1.4.1.3 Upon compliance of all the requirements mentioned above and/or other activities deemed necessary for the finalization of the plans, the consultant may now submit one (1) set of A-1 size, mylar plans for the approval together with the electronic files for reference.

1.4.2 Approved plans in A-1 size and all field data/records, computations, electronic files, and other technical data furnished by the consultant shall remain as the properties of the DPWH which shall have the right to use them for any purpose in the future.

Terms of References for Consultancy Services for the Geotechnical/Geological Investigations (TEST PIT/CBR)

Page 17 of 17 I. IMPLEMENTATION

A. STAFFING

The following experts/professionals and their members shall be required to carry out the Consulting Services for the road project and should have appropriate educational degree, relevant training and adequate years of experience in detailed engineering.

NUMBER AND LIST OF STAFF

KEY STAFF NO. OF MAN- STAFF MONTH

1 1. Project Manager

1 2. Sr. Geodetic Engineer

1 3. Sr. Geotechnical Engineer

2 5. Geodetic Engineer

2 6. Geotechnical Engineer

2 7. Civil Engineer/Materials Engineer

9 TOTAL

WORK SCHEDULE

The Consultant’s contract period for undertaking the aforementioned consultancy services shall be one hundred twenty (120) calendar days and the Consultant shall commence work after receipt of Notice to Proceed.

Prepared by: Submitted by:

RAMIL L. JULIANO FERNANDO LANDICHO Engineer II Officer-in-Charge Planning and Design Section

Recommending Approval: Approved:

DONNIE D. CUNA TEOFILO A. AYON Assistant District Engineer District Engineer