E1138 v. 7
Cross River State Water Board Limited
Public Disclosure Authorized
Itigidi, Obubra & Okpoma Water Distribution & Supply
Schemes Project
Public Disclosure Authorized
ENVIRONMENTAL & SOCIAL IMPACT ASSESSMENT
Public Disclosure Authorized Final Report
Public Disclosure Authorized January 2012
Itigidi, Obubra & Okpoma Water Distribution & Supply Schemes Environmental and Social Impact Assessment
PREPARED BY:
EARTHGUARDS LIMITED: Sustainable Development Consultants
SUITE 45 GOD’S OWN PLAZA 4 TAKUM CLOSE (BEHIND UNITY HOUSE) AREA 11, GARKI ABUJA [email protected] +234-9-8707469; +234-803-3740948
Itigidi, Obubra & Okpoma Water Distribution & Supply Schemes Environmental and Social Impact Assessment
LIST OF ACRONYMS
EA Environmental Assessment EIA Environmental Impact Assessment ESIA Environmental and Social Impact Assessment ESMF Environmental and Social Management Framework ESMP Environmental and Social Management Plan EPAD Environmental Protection and Assessment Department CRSWBL Cross River State Water Board Limited EMP Environmental Management Plan FCT Federal Capital Territory FEPA Federal Environmental Protection Agency FGDs Focus Group Discussions FGN Federal Government of Nigeria FM Frequency Modulation FMEnv Federal Ministry of Environment FMAWR Federal Ministry of Agriculture and Water Resources FPIU Federal Project Implementation Unit HSE Health, Safety and Environment IDA International Development Association LGA Local Government Authority M & E Monitoring and Evaluation NUWSRP National Urban Water Sector Reform Project NUWSRP1 First National Urban Water Sector Reform Project NUWSRP2 Second National Urban Water Sector Reform Project NWRP National Water Rehabilitation Project OP/BP Operation Policy/Bank Policy PAD Project Appraisal Document PCU Project Coordination Unit PHCN Power Holding Company of Nigeria PIU Project Implementation Unit PMU Project Management Unit PRA Participatory Rural Appraisal PPP Public Private Partnership PSP Private Sector Partner or Private Sector Participation RAP Resettlement Action Plan ROW Right of Way RPF Resettlement Policy Framework SMWR State Ministry of Water Resources SPIU State Project Implementation Unit SSI Semi Structured Interviewed SWAs State Water Agencies TOR Terms of Reference WHO World Health Organization WTP Willingness to Pay
Earthguards Limited: ii Sustainable Development Consultants Itigidi, Obubra & Okpoma Water Distribution & Supply Schemes Environmental and Social Impact Assessment
GLOSSARY OF TERMS
BOD Biochemical Oxygen Demand Ca Calcium Cd Cadmium CO Carbon Monoxide COD Chemical Oxygen Demand Cr Chromium Cu Copper dBA Decibel DO Dissolved Oxygen ESP Exchange Sodium Percentage Fe Iron HC Hydrocarbon Hg Mercury HB Heterotrophic Bacteria HF Heterotrophic Fungi HUB Hydrocarbon Utilizing Bacteria K Potassium Mg Magnesium N Nitrogen Ni Nickel NO 2 Nitrogen Dioxide NO 3 Nitrate NTU Nephelometric Turbidity Units P Phosphate Pb Lead pH Hydrogen ion concentration PO 4 Phosphate SO 2 Sulphur Dioxide SPM Suspended Particulate Matter TDS Total Dissolved Solids TOM Total Organic Matter TSS Total Suspended Solids V Vanadium Zn Zinc
Earthguards Limited: iii Sustainable Development Consultants Itigidi, Obubra & Okpoma Water Distribution & Supply Schemes Environmental and Social Impact Assessment
UNIT OF MEASUREMENTS
% Percentage uS/cm MicroSiemens per centimetre atm Atmosphere cfu/ml Colony forming unit per millimetre cm centimeter dBA Measures sound or noise level ft Feet g grammes g/l Grammes per litre g/kg Grammes per kilogramme meq/100g Milliequivalent per 100 gramme in inches km Kilometre m Metre m/s metre per second m2 metre square m3 metre cube mg/kg milligram per kilogramme mg/l milligram per litre mV millivolt mg/m 3 milligram per metre cubic ml millilitre mm millimetre mm/hr millimetre per hour mS/cm milliSiemens per centimetre NTU Nephelometric Turbidity Units oC Degrees Celcius ppm parts per million ppt parts per thousand s second ton tonne
Earthguards Limited: iv Sustainable Development Consultants Itigidi, Obubra & Okpoma Water Distribution & Supply Schemes Environmental and Social Impact Assessment
TABLE OF CONTENTS LIST OF ACRONYMS...... II
GLOSSARY OF TERMS ...... III
UNIT OF MEASUREMENTS ...... IV
TABLE OF CONTENTS...... V
LIST OF FIGURES...... VII
LIST OF TABLES...... VIII
EXECUTIVE SUMMARY...... X
1 INTRODUCTION...... 1
1.1 BACKGROUND ...... 1 1.2 OBJECTIVES OF THE ESIA...... 1 1.3 SCOPE OF WORK ...... 2 1.4 ESIA P ROCESS ...... 3 1.5 STUDY APPROACH AND METHODOLOGY ...... 4 1.5.1 Organization and Planning ...... 4 1.5.2 Environmental Study ...... 5 1.5.3 Social, Economic and Health Study ...... 6 1.6 PROJECT CLASSIFICATION ...... 6 2 PROJECT DESCRIPTION...... 8
2.1 PROJECT RATIONALE ...... 8 2.2 PROJECT COMPONENTS ...... 8 2.3 PROJECT ENVIRONMENT ...... 8 2.4 PROJECT LOCATIONS ...... 16 2.4.1 Itigidi Town Water Scheme (Abi LGA Project Locations) ...... 17 2.4.2 Obubra Town Water Scheme ( Obubra LGA Project Locations) ...... 19 2.4.3 Okpoma Town Water Scheme ( Yala LGA Project Locations) ...... 22 2.5 PROJECT ACTIVITY ...... 25 3 BASELINE INFORMATION...... 31
3.1 GENERAL OVERVIEW ...... 31 3.2 PHYSICAL ENVIRONMENT ...... 33 3.3 BASELINE DATA ANALYSIS ...... 36 3.3.1 Analysis of Surface and Underground Water Samples...... 37 3.3.2 Soil Sample Analysis ...... 42 3.3.3 Air Quality/Meteorological and Noise Measurement ...... 48 3.3.4 Environmental Impacts from the Water Treatment Process ...... 55 3.4 SOCIO -ECONOMICS ...... 57 3.4.1 Socio-Demographic Attributes of Respondents ...... 57 3.5 HEALTH IMPART ASSESSMENT ...... 62 3.5.1 Obubra LGA Project areas ...... 62 3.5.2 Abi LGA Project areas ...... 62 3.5.3 Yala LGA Project areas ...... 62
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4 POLICY, LEGAL AND REGULATORY FRAMEWORK ...... 64
4.1 WORLD BANK SAFEGUARD POLICIES ...... 64 4.2 NIGERIA ’ R EGULATORY FRAMEWORK ...... 64 4.2.1 The Federal Ministry of Environment. (FMEnv) ...... 64 4.2.2 International Guidelines and Conventions on Environment which Nigeria is signatory ...... 65 5 POTENTIAL ENVIRONMENTAL AND SOCIAL IMPACTS...... 67
5.1 INTRODUCTION ...... 67 5.2 ASSESSMENT METHODOLOGY ...... 67 5.5 POSITIVE ENVIRONMENTAL IMPACTS IN THE LOCATIONS ...... 81 Construction Phase ...... 81 Operation and Maintenance Phase ...... 81 5.6 POTENTIAL NEGATIVE IMPACTS ...... 81 5.7 WASTE WATER AND SLUDGE DISPOSAL ...... 81 5.7.1 Estimation of the quantities of sludge ...... 83 5.7.3 Sludge Treatment ...... 85 5.8 POTENTIAL IMPACTS RELATED TO THE WATER DISTRIBUTION AND SUPPLY SCHEME IN ABI , O BUBRA AND YALA LGA S...... 86 6 MITIGATION PLAN ...... 105
6.1 INTRODUCTION ...... 105 7 MONITORING PLAN...... 109
7.1 MONITORING PLAN ...... 109 7.2 MONITORING PROCEDURE :...... 109 8 ENVIRONMENTAL AND SOCIAL MANAGEMENT PLAN ...... 110
8.1 DEFINITION AND INTRODUCTION ...... 110 8.2 IMPLEMENTATION ARRANGEMENT ...... 111 8.2.1. World Bank ...... 112 8.2.2. Cross River State Water Board Limited (CRSWBL) ...... 112 8.2.3. Environmental Officer ...... 112 8.2.4. Contractor ...... 112 8.3 RECOMMENDED CAPACITY BUILDING AND TRAINING ...... 113 8.3.1 Training Needs ...... 113 8.3.2 Training of Contractors Personnel: ...... 114 8.4 ENVIRONMENTAL MANAGEMENT PLAN BUDGET ...... 114 9 PUBLIC CONSULTATION ...... 127
9.1 INTRODUCTION ...... 127 REFERENCES ...... 129
APPENDICIES...... 130
APPENDIX 1: L IST OF ESIA P REPARERS ...... 130 APPENDIX 2: S UMMARY OF WORLD BANK ENVIRONMENTAL AND SOCIAL SAFEGUARD POLICIES ...... 131 APPENDIX 3:- S OCIO -ECONOMIC DATA QUESTIONNAIRE ...... 133 APPENDIX 4: C ONSTRUCTION CONTRACTS ENVIRONMENTAL MANAGEMENT CONDITIONS ...... 137 APPENDIX 5: E XAMPLE FORMAT : HSE R EPORT ...... 143 APPENDIX 6: A TTENDANCE AT PUBLIC CONSULTATIVE MEETINGS AND PROCEEDINGS OF MEETINGS ...... 144 APPENDIX 7: P ROCEEDINGS OF MEETINGS ...... 149 APPENDIX 8: D EVELOPMENT OF A WASTE MANAGEMENT PLAN ...... 155
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LIST OF FIGURES
FIGURE 2.1: O BUBRA WATER TREATMENT PLANT LAYOUT ...... 11
FIGURE 2.2: I TIGIDI WATER TREATMENT PLANT LAYOUT PLAN ...... 13
FIGURE 2.3 O KPOMA WATER TREATMENT PLAN LAYOUT PLAN DRAWINGS ...... 15
FIGURE 2.4: M AP OF NIGERIA SHOWING PROJECT LOCATIONS IN CROSS RIVER STATE ...... 16
FIGURE 2.5: C OMMUNITIES AND PROPOSED WATER DISTRIBUTION NETWORK IN ABI LGA ...... 17
FIGURE 2.7: C OMMUNITIES AND WATER DISTRIBUTION NETWORK IN YALA LGA ...... 23
FIGURE 2.8 S CHEMATIC DIAGRAM OF A GENERAL TREATMENT PLANT ...... 27
FIGURE 3.1: M AP OF NIGERIA SHOWING THE VEGETATION OF CROSS RIVER STATE ...... 32
FIGURE 3.2: M EAN MONTHLY RELATIVE HUMIDITY IN THE STUDY AREA ...... 49
FIGURE 3.3: M EAN MONTHLY TEMPERATURE VARIATIONS WITHIN THE STUDY AREA ...... 49
FIGURE 5.1: I MPACT ASSESSMENT APPROACH ...... 67
FIGURE 5.2: R ISK ASSESSMENT MATRIX ...... 74
Earthguards Limited: vii Sustainable Development Consultants Itigidi, Obubra & Okpoma Water Distribution & Supply Schemes Environmental and Social Impact Assessment
LIST OF TABLES
TABLE 2.1: P ROJECT COMPONENTS AND LOCATIONS IN ABI LGA ...... 17
TABLE 2.3 P ROJECT COMPONENTS AND LOCATIONS IN YALA LGA...... 24
TABLE 2.4: W ATER DEMAND AND TREATMENT PLANT LAND TAKE ...... 29
TABLE 2.5: E STIMATION OF TOTAL SLUDGE GENERATED DURING THE PROJECT PERIOD ...... 30
TABLE 3.1: P OPULATION DISTRIBUTION OF CROSS RIVER STATE ...... 35
TABLE 3.2: O BUBRA LGA P ROJECT AREA : W ATER QUALITY RESULT ...... 37
TABLE 3.3. A BI LGA P ROJECT AREA : W ATER QUALITY RESULT ...... 38
TABLE 3.4 Y ALA LGA P ROJECT AREA : W ATER QUALITY RESULT ...... 40
TABLE 3.5: Y ALA LGA P ROJECT AREA : P HYSIO -CHEMICAL QUALITY OF SOIL ...... 42
TABLE 3.6: O BUBRA PROJECT AREA : S OIL QUALITY RESULT ...... 44
TABLE 3.7: A BI PROJECT AREA : S OIL QUALITY RESULT ...... 46
TABLE 3.8: M ETEOROLOGICAL MEASUREMENT FOR CRSWBL PROPOSED WATER PROJECT IN SEPT /O CT 2009...... 51
TABLE 3.9: A MBIENT AIR QUALITY AND NOISE CHARACTERISTICS IN THE STUDY AREA ...... 52
TABLE 3.10: E NVIRONMENTAL IMPACTS AND MITIGATION MEASURES ...... 55
TABLE 3.11: P ROJECT AREAS , THEIR LGA S AND DEMOGRAPHIC DISTRIBUTION ...... 57
TABLE 3.12: S OCIO -ECONOMIC ATTRIBUTES OF RESPONDENT ...... 58
TABLE 3.13: P ATTERN OF HEALTH IMPACT ASSESSMENT ...... 63
TABLE 5.1: I MPACT CHARACTERIZATION ...... 69
TABLE 5.2: C HECKLIST FOR RANKING OF ASSOCIATED AND POTENTIAL IMPACTS ...... 76
TABLE 5.3: I MPACT PROJECTION ...... 77
TABLE 5.4: CON ’TD : M ITIGATION MEASURE ...... 78
TABLE 5.5: S LUDGE TREATMENT PROCESS ...... 82
TABLE 5.6: D AILY WATER PRODUCTION RATE ...... 83
TABLE 5.7: E STIMATION OF TOTAL QUANTITY OF SLUDGE ...... 84
Earthguards Limited: viii Sustainable Development Consultants Itigidi, Obubra & Okpoma Water Distribution & Supply Schemes Environmental and Social Impact Assessment
TABLE 6.1 M ITIGATION HIERARCHY FOR PLANNED PROJECT ACTIVITIES ...... 105
TABLE 6.2: M ITIGATION MEASURES OF IMPACTS DURING PRE -CONSTRUCTION , C ONSTRUCTION AND OPERATION AND MAINTENANCE PHASE ...... 106
TABLE 8.1: T RAINING COURSE OUTLINE ...... 113
TABLE 8.2: B UDGET AND RESPONSIBILITIES ...... 114
TABLE 8.3: EMP T ABLE PORTRAYING IMPACT , M ITIGATION MEASURES , I MPLEMENTATION SCHEDULE AND RESPONSIBILITIES FOR MITIGATION AND MONITORING ...... 115
TABLE 9.1: S UMMARY OF PUBLIC CONSULTATIONS IN ABI , O BUBRA AND YALA ...... 128
Earthguards Limited: ix Sustainable Development Consultants Itigidi, Obubra & Okpoma Water Distribution & Supply Schemes Environmental and Social Impact Assessment
EXECUTIVE SUMMARY Introduction
The original Project, (NUWSRP II) with an IDA credit of US$ 200 million (IDA Credit No. 4086 UNI), was approved on July 15, 2005 in order to address some of the above deficiencies in water supply services. The Project's Development Objectives were to (i) improve reliability of water supply produced by the water treatment works in Lagos State; (ii) increase access to piped water networks in four cities in Cross River State; and (iii) improve commercial viability of the urban water utilities in Participating States. The project was made up of four components: (a) rehabilitation and systems expansion, (b) public private partnership development, (c) service sustainability and project management, (iv) institutional development and policy reform.
As a result of the successful implementation of NUWSRP 2 in the 2 states, the FGN is requesting an additional financing of US$150 million from the International Development Association (IDA) for Cross River state. The proposed additional credit will help finance the scaling up of the project activities in Cross River state by supporting the construction of 3 additional water supply systems in Itigidi, Obubra and Okpoma towns in the northern part of the state. A project extension of 3 years is proposed to cover the above activities.
The proposed civil works of the Water Supply Scheme include: • Construction of Intake and Weir; • Construction of Low and High Lift Pumping Stations; • Construction of Water Treatment Plants; • Construction of Ground Level Reservoirs; • Construction of Elevated Water Tanks; • Constructions of Kiosk and house connections; • Supply and lying of water supply pipes to cover approximately over 100km of sizes ranging from OD 75mm – OD 500mm including accessories etc; and • Construction of water kiosks and supply and installation of house connection, including pipes, accessories, conventional credit water meters with automatic meter reading (AMR) capabilities.
Purpose and Scope of the ESIA
The purpose of the ESIA is to identify the major issues and impacts associated with the project and to identify mitigation measures required to limit any such impacts to acceptable levels. The scope of the ESIA may be summarized as follows: • Assess the potential environmental and social impacts of the sub , whether positive or negative and propose effective mitigation measures for the negative impacts; • Inform the project team Cross River State Water Board Limited Project Implementation Unit (CRSWB PIU) and the CRSG of the potential impacts of different projects activities and relevant mitigation measures and strategies to be undertaken; • Develop an Environmental and Social Management Plan (ESMP) to ensure successful mitigation of all negative adverse impacts, a tangible monitoring indicator and plan, Estimate mitigation cost and institutional arrangements to execute this plan; and to provide clear instructions to works supervisors and contractors with regard to any measures that need to be implemented in order to limit any potential negative impacts to acceptable levels. • Identify environmental policies, legal and institutional framework pertaining to the project. • Access the existing institutional capacity to implement the ESMP and suggest measures for capacity gap development.
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Potential Environmental and Social Impacts
Water Supply projects are executed with the aim to improve water distribution services to the population by expanding water distribution points and increasing the quantities of water distributed. In general, therefore the proposed CRSG Water Supply Scheme would have substantial positive social impacts that will improve the public health and subsequently conditions of living in the LGAs.
However, there are a number of aspects of the project which have potential negative impacts.
Table ES1 shows some of the identified potential impacts and their impact ratings.
ES1: Identified Potential impacts and their impact ratings Impacts Pre-construction Phase Construction Phase Operation & maintenance Phase
Intake/ Treatment Pump/ Reservoirs/ Intake/ Treatment Pump/ Reservoirs/ Intake/ Treatment Pump/ Reservoirs/ Weir plant Pipeline Tanks Weir Plant Pipeline Tanks Weir Plant Pipeline Tanks POLLUTION Air pollution M M M M M M M M L L Water pollution L L L M M L L L M M L L Noise pollution L M M M M M M M L L L Soil Pollution M M M M M M M M L M L ENVIRONMENT Soil Erosion M L M L M L M L L L Ecosystem M M M M M L M L L L depletion WASTE GENERATION Increased sludge M production Increased waste M water Solid waste M M M M M M M M L L L generation HEALTH Safety of the public M M L M M M M M L L L L Public health risks L M L M M M M M L L L L Risk of STDs M L L L L L L L L L L L SOCIAL Land take L M M L L L L L L Social Conflict for M M L M L L L L L L water use Disruption of M M M M M M M M L L L commercial activities Key for impact rating:
High= H Medium=M Low=L Not applicable =
Table ES2 the potential impacts of the project and the proposed mitigation measures
Potential Impact Mitigation measures
Soil Erosion and Contamination Appropriate erosion protection measures such as construction of embankment or/and an alternate drainage route should be provided.
Land take Necessary resettlement action plan shall commence where land displacement is for permanent duration.
Water Pollution Disposal of sludge into the river or forest should be avoided
Noise Pollution Contractors/CRSWBL shall stick to the industry noise level limit of between 45dB and 55dB. Worker operating equipments exceeding permissible noise limit must not work longer than 8 hours per day, in addition to wearing necessary noise proof equipment
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Public Health Proper maintenance site and removal of water from ditches especially after rainfall or ground water infiltration. This should be done by the use of water pumps
Disturbance of Activities Establishment of traffic plans at locations of blockage; civil work activities should be reduced to areas of work site and impact on private property should be avoided as much as possible.
Air Pollution Sprinkling of water during dry periods to prevent dust and burning of waste should be avoided and waste collected should be directed to Cross River State Environmental Protection and Assessment Department (EPAD).
Sludge Disposal Sludge must be dewatered and stabilized and dry treated sludge can be economically used as manure for agricultural purposes
Solid waste Solid wastes to be generated during construction works shall be collected and disposed in the EPAD designated site. Further guidelines can be seen in the waste management plan.
Aesthetics During construction works, sites shall be delimited from the public with appropriate equipments. Maintenance /rehabilitation works shall be prompt in areas where there is leakage or any project induced factor that may lead to poor aesthetics of the environment
Flora Tree planting and re vegetation shall be embarked upon to restore the natural condition of the environment.
Disruption of Economic All civic works along the access roads shall be carried out in a manner that activities will not close the road; and where roads need to be temporarily blocked due to pipeline networking, a diversion route shall be created before blocking the existing road
` Environmental Management Plan
The Environmental Management Plan (EMP) for Itigidi, Obubra and Okpoma water production and distribution systems contains the following elements: • Description of Mitigation Measures: The EMP identified feasible and cost effective measures to reduce potentially significant adverse environmental and social impacts to acceptable levels. • Description of Monitoring Program: Environmental performance monitoring is designed to ensure that mitigation measures are implemented. It is in compliance with national standards, International Finance Corporation Performance Standards and World Bank Safeguard Policies. • Institutional Arrangements: Responsibilities for mitigation and monitoring are clearly defined amongst the various stakeholders. • Implementation Schedule and Reporting Procedures: The timing, frequency, and duration of mitigation measures are specified in an implementation schedule, showing links with the overall Project Implementation Plans (PIP).
Cost Estimate and Responsibility for the Environmental Management Plan
ITEM RESPONSIBILITY COST BREAKDOWN COST ESTIMATE COST ESTIMATE IN IN NIGERIAN NAIRA US DOLLARS (N) (US$)
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Mitigation CRSWBL /EPAD 1,572,000 10,480 Management CRSWBL 5% of Mitigation Cost 78,600 524 Monitoring CRSWBL / EPAD 25% of Mitigation Cost 393,000 2620 Training/ CRSWBL/Consultant 1,886,800 12,579 Capacity Building Resettlement Cost 2,343,000 15,620 Sub Total 6,273,400 41,823 Contingency 10% of Sub Total 1,707,340. 11,382 Total per LGA 7,980,740 53,205 Total for three 3 * Total per Town 23,942,220 159,615 (3) LGAs
The total cost for the EMP in the three (3) LGAs is estimated at Twenty Three Million Nine Hundred and Forty Two Thousand, Two Hundred and Twenty only (N23, 942,220).
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1 INTRODUCTION
1.1 Background
The original Project, (NUWSRP II) with an IDA credit of US$ 200 million (IDA Credit No. 4086 UNI), was approved on July 15, 2005 in order to address some of the above deficiencies in water supply services. The Project's Development Objectives were to (i) improve reliability of water supply produced by the water treatment works in Lagos State; (ii) increase access to piped water networks in four cities in Cross River State; and (iii) improve commercial viability of the urban water utilities in Participating States. The project was made up of four components: (a) rehabilitation and systems expansion, (b) public private partnership development, (c) service sustainability and project management, (iv) institutional development and policy reform.
As a result of the successful implementation of NUWSRP 2 in the 2 states, the FGN is requesting an additional financing of US$150 million from the International Development Association (IDA) for Cross River state. The proposed additional credit will help finance the scaling up of the project activities in Cross River state by supporting the construction of 3 additional water supply systems in Itigidi, Obubra and Okpoma towns in the northern part of the state. A project extension of 3 years is proposed to cover the above activities.
The proposed civil works of the Water Supply Scheme include: • Construction of Intake and Weir; • Construction of Low and High Lift Pumping Stations; • Construction of Water Treatment Plants; • Construction of Ground Level Reservoirs; • Construction of Elevated Water Tanks; • Constructions of Kiosk and house connections; • Supply and lying of water supply pipes to cover approximately over 100km of sizes ranging from OD 75mm – OD 500mm including accessories etc; and • Construction of water kiosks and supply and installation of house connection, including pipes, accessories, conventional credit water meters with automatic meter reading (AMR) capabilities.
The water supply scheme is aimed at providing access to portable pipe borne water to some selected semi urban and rural communities of the state. The water supply Scheme includes the rehabilitation/construction of water production and distribution systems in the selected communities.
1.2 Objectives of the ESIA This report presents the results of the Environmental and Social Impact Assessment (ESIA) of the civil works of the proposed project. The major objective of the ESIA is to identify potential environmental and social impacts associated with the project and to identify any measures required to limit such impacts to acceptable levels.
More specifically, the objectives of the ESIA are to: • Assess the potential environmental and social impacts of the project’s activities (rehabilitation, extension, or new constructions), and propose mitigation measures which will effectively address these potential impacts;
1 Earthguards Limited Environmental and Social Impact Assessment of Ikom, Ogoja and Obudu Water Supply Schemes
• Inform the project team Cross River State Water Board Limited Project Implementation Unit (CRSWB PIU) and the CRSG of the potential negative impacts and propose relevant mitigation measures and strategies to be undertaken;
• Develop an environmental and social management process to ensure successful mitigation of all adverse impacts; develop a monitoring plan and institutional arrangements to execute this plan; and to provide clear instructions to works supervisors and contractors with regard to any measures that need to be implemented in order to limit any potential negative impacts to acceptable levels
• Identify international and national environmental policies, legal and institutional frameworks pertaining to the proposed project.
1.3 Scope of Work The Consultant shall:
• Study and familiarize himself with the provisions of ESMF and RPF prepared by the Federal Ministry of Water Resources for the implementation of project activities in the participating states.
• Undertake field visits to each of the three towns and possible project sites Prepare an ESIA report.
• Ensure that each report mentioned in (b) above covers the entire project schemes of Itigidi,Obubra and Okpoma.
• Study and review Engineering and Technical Designs for planned investments to identify assess and quantify to the extent possible, all environmental and social impacts and risks in the project schemes.
• Provide detailed and tangible mitigation measures to reverse these adverse impacts or manage them within acceptable limits according to existing law in Nigeria and World Bank Safeguard Policies.
• Develop an Environmental and Social Management Process to ensure successful mitigation of all adverse impacts, a tangible monitoring plan and institutional arrangements to execute this plan.
• Assess further the State Water Board’s capacity to manage the sub project’s Environmental and Social issues and propose measures on how to reinforce their capacity, for example, by establishing an Environmental Unit, and providing technical training.
• Suggest Capacity Building and Technical Assistance requirements in relation to safeguard and awareness needs in the public and private sectors to be implemented under the proposed sub project.
• Develop a suitable maintenance plan with estimates of costs to ensure sustainability of mitigation measures.
• Prepare outline reports that are concise but detailed and thorough to include all significant Environmental and Social Impacts. The reports should focus on identifying impacts, mitigating them in the Technical Designs, during construction, operation and sustainable through an effective maintenance plan.
• Submit six (6) separate Reports to the Cross River State Water Board Limited (CRSWBL).
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1.4 ESIA Process
The ESIA process details the methodology for the assessment and management of environmental issues in any development project. This includes screening, scoping, baseline/ data collection, identification of potential environmental impacts and required management action steps to be taken.
The applied ESIA process is presented below, while further site details are shown in chapter 5 of this report.
• Stage 1: Screening: This includes an analysis of the proposed project’s terms of activities to be undertaken, and facility to be established in order to determine the suitability or otherwise of project and whether EA was needed and the scale of impact. This was done using the World Bank safeguards policies, ISO 14001 checklist criteria and best professional judgment. The outcome of this is that the proposed project requires environmental assessment, and is a category B project.
• Stage 2: Scoping: Determines any project activities and facilities that might potentially cause interferences with the environment and society. Furthermore, determines any particular environmental sensitivities and conditions that are of relevance to the proposed project. This includes a reconnaissance level visit and full field visit to the various project locations.
• Stage 3: On the basis of the analysis in stages 1 and 2, identify any potential impacts of the project on the environment. Depending on the nature of the project activities and facility, as well as specific environmental conditions, the potential significance of such impacts is determined.
• Stage 4: Identifies and reviews relevant measures to be taken in order to prevent or reduce any potential adverse impacts to acceptable levels. Furthermore, measures for monitoring and control impacts, including verification of the proposed mitigations measures are determined.
• Stage 5: Where impacts may not be successfully prevented or reduced to acceptable levels, measures are defined to either recover environmental conditions, or compensate for unavoidable damage.
• Stage 6: Summary of impacts The predicted adverse environmental and social impacts for which mitigation is required should be identified and summarized.
• Stage 7: Description of mitigation measures The ESMP identifies feasible and cost effective measures to reduce potentially significant adverse environmental and social impacts to acceptable levels.
• Stage 8: Description of monitoring program environmental performance monitoring should be designed to ensure that mitigation measures are implemented, have the intended result, and remedial measures are undertaken if mitigation measures are inadequate or impacts have been underestimated within the ESIA report. It should also assess compliance with national guidelines and World Bank s OP 4.01 (Environmental Assessment).
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• Stage 9: Institutional arrangements: Responsibilities for mitigation and monitoring should be clearly defined. The EMP will identify arrangements for coordination between the various actors responsible for mitigation.
• Stage 10: Cost estimates: These should both the initial investment and recurring expenses for implementing all measures contained in the ESMP and then integrated into the total project costs.
1.5 Study Approach and Methodology
The ESIA will be prepared in accordance with:
• World Bank Safeguard Policy Operational Policy (OP/BP 4.01): Environmental Assessment, and • Nigerian Government Environmental Impact Assessment (EIA) Act No. 86 of 1992
A multi methodological approach was used for the ESIA study to cover the following principal areas: • Project organization and planning, • Environmental Assessment, and • Socio economic Assessment
Details of the assessment methodologies are as follows:
1.5.1 Organization and Planning
Project organization and planning was undertaken by collecting relevant materials and information about the project; and a desk review of the literatures.
The materials collected and reviewed include: • The gazette of the Nigerian regulatory framework, • Project Appraisal Document (PAD) of the NUWSRP2,
• World Bank Safeguard Policies especially Environmental Assessment Safeguard Policy (OP 4.01), • the general environmental management conditions for construction contracts, engineering and technical designs, work requirements of the treatment plants and other extension/densification of Cross River water distribution system, • baseline information relating to the physical, biological and socio cultural environment of Ikom, Obudu and Ogoja, and the entire Cross River State (including the climatic conditions), • the Constitution of the Federal Republic of Nigeria, numerous relevant Federal, State, and local laws, regulations, decrees, acts, and guidelines, • The harmonized Environmental and Social Management Framework (ESMF) of the National Urban Water Sector Reform Project (NUWSRP), • Resettlement Policy Framework (RPF) of NUWSRP, and • Baseline information relating to the physical, biological and socio cultural environment of Cross River State (including the climatic conditions),
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Itigidi, Obubra & Okpoma Water Distribution & Supply Schemes Environmental and Social Impact Assessment
1.5.2 Environmental Study
Environmental study was based on:
Reconnaissance level survey
This was the first level visit to the project area to familiarize with the proposed facility sites and the geo physical conditions of the project area. It also included visits to institutions and authorities who would partner in the implementation process as well as the various communities that this project would be impacting; being the first stage of public consultation. This occurred along side the socio economic survey
Water quality study
Water samples for analysis were collected daily from various sources of water used by the communities; including the proposed water extraction sources for the project. Water was collected as a composite sample at each sample station. At each time of water collection, two separated set of samples were collected, one for the determination of heavy metals and the other for the determination of physico chemical parameters. Water samples were collected in plastic containers after being rinsed with ambient water from each station and labeled accordingly. Analysis of pyhsico chemical parameters was determined in the laboratory, while heavy metals were determined using the Atomic Absorption Spectrometer (AAS). Water quality analysis in relation to the study is to determine the bacteria loads, level of metal composition and chemicals, and subject them to the WHO/Nigerian Federal Ministry of Environment standards for drinking water. Quality control of water collection was ensured by: • Ensuring that professionals only collect water samples • Wearing hand gloves • Immersing the container inside the water and stoppering below surface water
• Transporting samples to laboratory for analysis within 24 hours of collection. Soil Quality study
Soil samples were collected from locations of various proposed constructions and installations. This was also collected from the water resources sites being used or proposed for this water scheme project for the purpose of determining the existing physico chemical soil conditions.
Quality control of soil collection entailed; o removing the topsoil, and collecting soil below 2cm from the surface soil level, o Air drying soil samples o Labeling of each soil sample, o Transporting samples to laboratory for analysis within 24 hours of collection.
This involved visits to all the communities of project influence in the 3 project areas. All the proposed locations for facility constructions including the intake and weirs were visited to observe the nature of the environmental conditions.
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Air and Noise Quality
Using air and noise quality equipment, the experts tested surveyed proposed sites in all the project areas. The analysis was subjected to the standards given by the Federal Ministry of Environment in Nigeria. This will help during implementation for pollution control and compliance monitoring.
1.5.3 Social, Economic and Health Study
The first step adopted was to visit authorities and communities that this project would be impacting. The community consultation as a tool of social study would not only community participation and sustainable development, but was used to create awareness of the questionnaire to be administered to the households in the project areas; and at the same time was useful for eliciting the communicable health concerns of the project communities.
Semi Structured Interview (SSI) questionnaire, a tool of Participatory Rural Appraisal (PRA) was used for data collection from the respondents.
A sample of the SSI Questionnaire used for the field study is presented in Appendix 5.
To ensure quality control of the field work, the following steps were taken:
Field Interviewers/Enumerators
The instrument was administered by well trained and tested research assistants and enumerators, under close supervision. Field enumerators were recruited based on the following: Graduate from a higher institution; Ability to speak the local language; Familiarity with the project area.
Training was held for all field enumerators and supervisors by the experts in the consulting firm. The training included: Detailed explanation of the entire project; The importance, and how to administer the questionnaires; Field practices/ reconnaissance survey using the SSI; Cross Checking of questionnaire filled by the research assistants enumerators during the field practice to ascertain their ability to use the SSI.
1.6 Project Classification
The classification phase involves a preliminary screening that categorizes the proposed project, so as to determine the nature and extent of the environmental assessment needed. Projects are classified as category A, B or C (high, medium and low social or environmental risks) depending on the type, location (nearness to ecologically vulnerable areas), sensitivity and scale of the project, as well as the nature and magnitude of its possible impacts. • Category A: A proposed project is classified in this category if it is likely to have significant adverse environmental impacts that are sensitive (and may be irreversible), diverse or unprecedented. These projects may affect an area broader than the sites or facilities subject to physical work. Earthguards Limited: 6 Sustainable Development Consultants
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• Category B: A proposed project receives this classification if it has potential environmental impacts on human populations or environmentally important areas –including wetlands, forests, grasslands, and other natural habitats –that are less adverse than those of Category A projects. These impacts are site-specific ; few if any of them are irreversible; and in most cases mitigation measures can be designed more readily than for Category A projects.
• Category C: A proposed project is classified as a Category C if it is likely to have minimal or no adverse environmental impacts.
This project is classified as a Category B project because: o Its impacts are site specific o Its impacts are reversible, or in most cases have practical mitigation measures o Most of its impacts fall within medium and low ratings.
As a result of the above justification and classification, this project is classified as a Category B (medium impacts) project. It is therefore required that an Environmental and Social Impact Assessment (ESIA) be prepared.
This ESIA report is prepared as a stand alone document for ease of implementation by the CRSWBL.
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2 PROJECT DESCRIPTION
2.1 Project Rationale
The Cross River State Government considers the provision of potable water as a critical element in its policy for sustainable economic development and poverty reduction. The project’s principal development outcomes are: • Increased reliability and financial viability of selected urban water utilities; • Increased access to piped water networks in selected urban areas; and • Improve financial viability of the urban water utilities in the selected urban areas of Cross River State.
Progress toward these principal development outcomes will be measured through: • The increase in water delivered through existing and extended networks; • Improvements in cost recovery, especially the degree to which operating costs are recovered from water sales revenues in Cross River State; and • Increase in the number of households having access to the piped water network.
2.2 Project Components
The proposed civil works of the Water Supply Scheme include: • Construction of Intake and Weir; • Construction of Low and High Lift Pumping Stations; • Construction of Water Treatment Plants; • Construction of Ground Level Reservoirs; • Construction of Elevated Water Tanks; • Supply and lying of water supply pipes to cover approximately over 100km of sizes ranging from OD 75mm – OD 500mm including accessories etc. • Construction of about 130 water kiosk and supply and installation of house connection, including pipes, accessories, conventional credit water meters with automatic meter reading (AMR) capabilities for approximately 1,500 house connection. The CRSWBL commissioned detailed engineering design for these civil works for these civil works to result in construction specifications and drawings for inclusion in the tender documents; this work has been carried by SGI Consulting Engineers Limited.
2.3 Project Environment
From field survey and expert review of the feasibility report of the proposed sites the site information of the various facilities across the three (3) project areas are presented as follows:
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Fig 2.1(a): A section of River Cross, source of intake for Itigidi and Obubra project areas Fig 2.1(b): A section of Onwan river source of Intake for Okpoma project area
Fig 2.1(d): Proposed Treatment Plant site at Obubra showing uncompleted building and Fig 2.1(c): Proposed New Treatment Farm land to be affected Plant site at Itigidi old market
Fig 2.1(e): Proposed New Treatment Plant site at Okpoma Fig 2.1(f): Affected buildings in the right of way of water pipeline in Itigidi
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Obubra site information:
Intake and Weir Site The intake and weir plant is located by the river bank of River Cross at Adun Beach. The land take is about 50m x 100m. Activities around the river bank include crop cultivation, while fishing is said to take place at a distance as a result of constant human activities by the community which have drove aquatic habitats afar–off. There are no buildings and/or habitations within the area. Access to the treatment plant is through motor bike.
Raw water extraction is from River Cross which bisects Itigidi, Obubra, Ikom and flows through to Republic of Cameroun. The River is massive, and has a historical record of large water resources at both dry and rainy seasons (SGI Ingenierie SA of Geneva, 2009).
Treatment Plant Site: The proposed treatment plant site is located at the left bank side of Adun Beach village about 500m away from the intake site. It is a communal land given to individuals for agricultural purposes. The total land space measures 350m x 250m. There is an uncompleted building project about 70m west of the proposed site. The site is located about 250m away from the regular settlements. Figure 2.1 shows the Obubra water treatment plant layout.
Pipeline network route The water pipeline work is expected to follow along existing road path. The communities where the pipeline will pass through are mostly rural. Their major occupation is farming, with few people into petty trading. There are no private or community assets or means of livelihood to be affected by the pipeline work. However, intermittent obstruction to movement is expected. As a result of this, basic safety cautions for construction works will apply.
Kiosk Construction sites The construction of kiosks will be done at various points within the settlements. It is expected to be situated on the Neighborhood on certification of feasibility study of proposed site. However, necessary sanitation plan and training is being proposed as an integral of the management plan.
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1. COAGULATION From River Cross +FLOCCULATION TNAK F 2. SETTLING TANK 1 D B 3. SAND FILTER C 11 4. CHLORINATION TANK 2 2 9 2 2 22 5. CLEAR WATER TANK
6. PUMPING STATION 10 A 8 (CONVEYANCE)
7. BACK WASH PUMPING 3 E
STATION 8
8. SLUDGE PUMPING STATION 1 1 7 9. SLUDGE THICKENER G 5 6
10. DRYING BEDS 4 Water supply 11. RETURN WATER PUMPING conveyance STATION 5 system FIRST STAGE A HEADQUARTER BUILDING
B ELECTRICALLONG TERMBUILDING
C TECHNICAL BUILDING ACCESS ROAD D REAGENT BUILDING
Figure 2.1: Obubra Water Treatment Plant Layout
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Itigidi site information:
Intake and Weir site The facility is using the existing intake site at Itigidi town, which lies about 200m away from the Itigidi town hall, and about 150m away from the existing water treatment plant. Raw water extraction is from River Cross which bisects Itigidi, Obubra, Ikom and flows through Republic of Cameroun. The River is massive, and has a historical record of large water resources at both dry and rainy seasons (SGI Ingenierie SA of Geneva, 2009))
Treatment Plant Site: The existing plant operating from that site is virtually redundant and will be replaced by the proposed new plant because the existing plant site is not large enough to accommodate the new plant. The new plant is about 300m away from the old site. It is on the side of the old market. The local authority has built a new market, and has offered the old market for the new water treatment plant.
There is neither human habitation nor agricultural activities in the proposed site. Figure 2.2 shows the Itigidi water treatment plant layout.
Pipeline network route The water pipeline work is expected to follow along existing road path for the most of the rural developing adjoining communities. In this area the settlement pattern is typically traditional with scattered and nucleated structures of houses made of mostly mud walls. However, pipeline in Itigidi town will follow the existing right of way. This will entail the rehabilitation of the existing pipeline network. This will obviously disrupt movement and affect private assets.
Kiosk Construction sites The construction of kiosks will be done at various points within the settlements. It is expected to be situated on the Neighbourhood on certification of feasibility study of proposed site. However, necessary sanitation plan and training is being proposed as an integral of the management plan.
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1. COAGULATION +FLOCCULATION G 4 TNAK 5
2. SETTLING TANK 6 3. SAND FILTER 7 10 B 5 4. CHLORINATION TANK E 3 5. CLEAR WATER TANK
Water supply conveyance system 6. PUMPING STATION (CONVEYANCE) 10 9 8 F 7. BAC K WASH PUMPING STATION
ITIGIDI C 8. SLUDGE PUMPING STATION
9. SLUDGE THICKENER 2 2 2 10. DRYING BEDS
11. RETURN WATER PUMPING STATION
A HEADQUARTER BUILDING ACCESS ROAD A B ELECTRICAL BUILDING 1 FIRST STAGE D C TECHNICALINVESTMENT BUILDING LONG TERM 11
From River Cross Figure 2.2: Itigidi Water Treatment Plant Layout Plan
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Okpoma site information
Intake site The proposed intake site is situated on the Onwe River. The land is owned by the community and is located 4km away from settlement. The land was previously used for crop cultivation purpose until it was offered for use of the water scheme.
Feasibility study carried out by SGI Ingenierie SA of Geneva (2009) on behalf Cross River State Water Board shows that Onwe River is large and feasible to serve the purpose of the scheme along with other competing local uses in both dry and rainy seasons.
Treatment Plant Site: The treatment plant is located in Idigbo Okpoma, about 3 km distance away from settlement, and the land take is about 275M x 200M. The land is owned by the community, who has offered same for the facility. The site is located in a grass land space with no habitation. Surrounding land around the proposed site is used for farming by members of the community. The plan layout of the Okpoma water treatment plant is shown in figure 2.3.
There is a road from Okpoma to the Onwe River that at present is motor able only in the dry season but which, as part of the project, will be converted to an all season laterite road. This will be of assistance to the farmers who till land in areas bordering this road and provide them an opportunity to move their produce to the market .
Pipeline network route The water pipeline work is expected to follow along existing road path. The communities where the pipeline will pass through are mostly rural. The settlement pattern is typically traditional with scattered and nucleated structures of houses made of mostly mud walls.
Their major occupation is farming. There are no private or community assets or means of livelihood to be affected by the pipeline work. However, intermittent obstruction to movement is expected. As a result of this, basic safety cautions for construction works will apply.
Kiosk Construction sites The construction of kiosks will be done at various points within the settlements. It is expected to be situated on the Neighbourhood on certification of feasibility study of proposed site. However, necessary sanitation plan and training is being proposed as an integral of the management plan.
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OKPOM A
FROM ONWE RIVER
1. COAGULATION +FLOCCULATION TNAK
2. SETTLING TANK F
3. SAND FILTER 1 Water supply 4. CHLORINATION TANK conveyance system 5. CLEAR WATER TANK 10 6. PUMPING STATION (CONVEYANCE) 9 6 7. BACK WASH PUMPING STATION 1 D B A 8. SLUDGE PUMPING STATION
9. SLUDGE THICKENER 10. DRYING BEDS 22 22 2 2 C 11. RETURN WATER PUMPING STATION 8 5
A HEADQUARTER BUILDING
B ELECTRICALACCESS BUILDING ROAD 4 E 5 C TECHNICALFIRST BUILDING STAGE E 3 INVESTMENT D REAGENT LONGBUILDING TERM 7 Figure 2.3 Okpoma Water Treatment Plan Layout Plan Drawings
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2.4 Project Locations
The proposed project will be carried out in Abi, Obubra and Yala LGAs as seen in figure 2.4 and exact description of the project components in the three (3) LGAs can be seen in the sections that follow.
Figure 2.4: Map of Nigeria showing project locations in Cross River State
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2.4.1 Itigidi Town Water Scheme (Abi LGA Project Locations)
The Abi LGA project area comprises of Itigidi town and 12 communities namely Adadama, Egboronyi, Emin Ekpon, Anong, Likpoma, Akaefor Esegeh, Akarefor, Ekureku, Agbara, Ngarebe, Akpoha, Itgeve and Isong Inyang. Figure 2.5 indicates the water facilities, pipeline routes and the communities to be connected to the proposed Water Supply Scheme.
Figure 2.5: Communities and proposed water distribution network in Abi LGA
Table 2.1: Project Components and Locations in Abi LGA Location Project Components
Itigidi Town • Raw Water Intake Station is via a LLPS through (0.05km/500mm diameter) Ductile pipes to a Water Treatment Plant • Water Treatment Plant
• Water Treatment Plant pipes (DI) of (1km/450mm diameter) to school rd GLR
• Primary Pipes (DI) of (1km400mm diameter) from School rd GLR via a HLPS to LGA Hq GLR
• Primary Pipes of (0.8km/300mm diameter) from School rd GLR pipes to Central Itigidi
• Primary pipes of 0.8km/180mm diameter from LGA Hq to Northern Itigidi
• Distribution within Northern and Central Itigidi town via secondary PVC pipes (8.5km)
• Construction of 16 kiosks in Itigidi town
• LGA Hq primary pipes (DI) of 2.5km/400mm diameter) to T junction
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Location Project Components
Location • T junction pipes(DI) of 5.8km/300mm diameter to Adadama GLR
• Primary pipes of (1km/300m diameter) from Adadama GLR to Adadama community
• Distribution within Adadama community via secondary PVC pipes (7.7km)
• Construction of 14 kiosks Adadama community
Adadama/Imina • Primary pipes(HDPE) of (0.7km/110mm diameter) from Adadama GLR to Imina EWT
• Primary pipes of (0.1km/110mm diameter) from Imina EWT to Imina community
• Primary pipes of (2km/110mm diameter) from Imina EWT to Itigieve community
Itigieve • Primary pipes of (0.7km/75mm diameter from Itigieve community to Isong Inyang community
• Distribution within Itigieve and Isong Inyang communities via secondary PVC pipes (1.2 km)
• Construction of 3 kiosks in Itigieve and Isong Inyang communities
Akerofor • Distribution with Akerofor community via secondary PVC pipes (3.2 km) • Construction of 8 kiosks in Akerofor community • Distribution with Akerofor Esegeh commuinty via secondary PVC pipes (0.6km) • Construction of 2 kiosks in Akerofor Esegeh community • Primary pipes of (0.9km/100mm diameter) from Akerofor community to Likpoma community
Likpoma • Distribution within Likpoma communty via secondary PVC pipes (0.9km) • Construction of 2 kiosks in Likpoma community
Ekureku • Primary pipes of (0.5km/250mm diameter) from Anong EWT to Ekureku community • Distribution within Ekureku community via secondary PVC pipes (3km) • Construction of 7 kiosks in Ekureku community • Primary pipes of (1.4km/160mm diameter) from Ekureku community to Akpoha community
Akpoha • Distribution within Akpoha community via secondary PVC pipes (2.4km) • Construction of 6 kiosks in Akpoha community • Primary pipes of (1.4km/200mm diameter) from Ekureku community to Ngarebe community
Ngarebe • Distribution within Ngarebe community via secondary PVC pipes (2.6km) • Construction of 7 kiosks in Ngarebe community • Primary pipes of (0.8km/200mm diameter) from Ngarebe community to Agbara
Agbara • Distribution within Agbara community via secondary PVC pipes (7 km) • Construction of 18 kiosks in Agbara community
The Water Supply Scheme for Abi LGA and surrounding communities is as follows:
• Surface water abstraction from river cross by means of intake raw Water Pumping Station located at Itigidi close to River Cross. • Treatment plant located at Itigidi receive the raw water for processing • High Lift Pumping Station (HLPS) at Local Government Authority conveys the total water demand from the treatment plant to the planned Local Government Authority Ground Level Reservoir (LGA GLR). Earthguards Limited: 18 Sustainable Development Consultants
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• From this GLR, treated water is supplied to central Itigidi center will be secure through two newly built reservoirs such as a GLR installed close to School Road and design to supply the lowest part of the city, called central Itigidi and EWT sited on the LGA GLR location which will be built to supply Northern Itigidi. • A gravity main will be linked to the outlet of the LGA GLR and go on to the North East to Adadama Egboronyi junction where a T will be installed • From the T junction, the proposed pipe goes straight to Adadama GLR through the main road. • A proposed Elevated Water Tank (EWT) will be constructed at Imina to supply water to the communities of Itigeve and Isong Inyang. • Also from the junction, a 350mm ductile iron pipe will be connected to the T and will carry on to the Egboronyi Emin Ekpon junction. • On the junction quoted above, a double socket tee will be installed to supply three proposed overhead reservoir in Emin Ekpon and Egboronyi, distributing water to the respective communities and Anong, distributing water to Anong, Agbara, Akpoha, Ekureku, Akarefor, Ngarebe and Likpoma.
2.4.2 Obubra Town Water Scheme ( Obubra LGA Project Locations) The Obubra LGA project area comprises of Obubra town and 18 communities namely Owakande I, Owakande II, Ogada I, Ogada II, Apipum, Ofatura, Ovonum, Ofodua, Iyamoyong, Ohana, Ofukpa, Ofat, Ababene, Obubra station/ Mile I, Onyedama, Adun Beach, Ofonbongha, Ochon and Oderigha. Figure 2.6 indicates the water facilities, pipeline routes and the communities to be connected to the proposed Water Supply Scheme.
Figure 2.6: Communities and proposed water distribution network in Obubra LGA Earthguards Limited: 19 Sustainable Development Consultants
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Table 2.2: Project Components and Locations in Obubra LGA
Location Project Components • Raw Water Intake Station through Ductile pipes of (0.5 Km/600mm diameter)to a Water Adun Beach Treatment Plant at Adun Beach • Primary pipes (HDPE) of (1km/75mm diameter) from Water Treatment Plant to Adun Beach EWT • Pipes of (0.1km/110mm diameter) from Adun EWT to Adun Beach
• Distribution within Adun Beach community via secondary PVC pipes (1.3km) • Construction of 3 kiosks in Adun Beach community • Primary pipes (DI) of (5.1km/400mm diameter) from Water Treatment Plant to Ofat Ofat EWT • Pipes of (0.2km/500mm diameter) from Ofat EWT to Ofat junction • Pipes of (0.2km/300mm diameter) from Ofat junction to Ofat community • Distribution within Ofat commuinty via secondary PVC pipes (5.1km) • Construction of 10 kiosks in Ofat community
Ofatura • Pipes of (1.9km/400mm diameter) from Ofat junction to Ofatura • Distribution within Ofatura community via secondary PVC pipes (2.9km) • Construction of 6 kiosks in Ofatura community Ofodua • Pipes of (0.3km/350mm diameter) from Ofatura to Ofodua
• Distribution within Ofodua community via secondary PVC pipes (8.3km) • Construction of 16 kiosks in Ofodua community Abebene • Pipes of (1km/300mm diameter) from Ofat junction to Abebene
• Distribution within Ababene community via secondary PVC pipes (7.6km) • Construction of 19 kiosks in Ababene community • Pipe of (1.3km/250mm diameter) from Ofat junction to Oderigha Oderigha • Distribution within Oderigha community via secondary PVC pipes (2.1km) • Construction of 4 kiosks in Oderigha community
Onyedama • Pipes of (2.6km/180mm diameter) from Oderigha to Onyeadema • Distribution within Onyedama community via secondary PVC pipes (4.1km) • Construction of 10 kiosks in Onyedama community • Primary pipes (DI) of (4.1km450mm diameter)from Water Treatment Plant to Apapium Apapium GLR • Pipes (DI) of (0.03km/350mm diameter) from Apapium GLR to Apapium EWT • Pipes of (1.7km/450mm diameter) from Apapium EWT to Apapium community • Distrbution within Apapium community via secondary PVC pipes (7.9km) • Construction of 15 kiosks in Apapium community Ovonum • Pipes of (1.3km/300mm diameter) from Apapium community to Ovonum community • Distribution within Ovonum community via secondary PVC pipes (5.6km) • Construction of 10 kiosks in Ovonum community Ofukpa • Pipes of (1.9km/60mm diameter) from Apapium EWT to Ofukpa community • Distribution within Ofukpa community via secondary PVC pipe • Construction of 1 kiosks in Ofukpa community
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Location Project Components Mile 1 • Pipe (DI) of (12.1km/350mm diameter) from Apapium GLR to Mile 1 EWT • Pipe of (0.04km/300mm diameter) from Mile I EWT to Mile I community • Distribution within Mile I community via secondary PVC pipe (3.8km) • Construction of 7 Kiosks in Mile I/ Obubra Town Ogada I • Pipe of (2.1km/250mm diameter) from Mile I community to Ogada junction • Pipe of (5km/160mm diameter) from Ogada junction to Ogada I community • Distribution within Ogada I community via PVC pipe (3.6km) • Construction of 9 Kiosks in Ogada I community Ogada II • Pipes of (1.1km/200mm diameter) from Ogada junction to Ogada II community • Distribution within Ogada II community via PVC pipe (5.2km) • Construction of 13 Kiosks in Ogada II community Owakande II • Pipes of (0.09km/125mm diameter) from Ogada II community to Owakande II community • Distribution within Owakande I community via PVC pipe (1.6km) • Construction of 4 Kiosks in Owakande I community Obubra junction • Pipe of (1.2km/300mm diameter) from Mile I EWT to Obubra junction • Distribution within Obubra junction community via PVC pipe (3.8km) • Construction of 7 Kiosks in Obubra junction community Obubra I • Pipe of (0.8km/200mm diameter) from Obubra junction to Obubra station • Pipe of (1.8km/200mm diameter) from Obubra junction to Obubra I community • Distribution within Obubra I community via PVC pipe (2.2km) • Construction of 4 Kiosks in Obubra I Owakande I • Pipe of (2.5km/250m diameter) from Obubra junction to Owakande community • Distribution within Owakande I community via PVC pipe (2.3km) • Construction of 6 Kiosks in Owakande I community Ofonbongha • Pipe of (0.4km/225mm diameter) from Owakande to Ofonbongha I community • Pipe of (0.9km/200mm diameter) from Ofonbongha I community to Ofonbongha II community • Pipe of (0.3km/200mm diameter) from Ofonbongha II community to Ofonbongha III community • Pipe of (1km/180mm diameter) from Ofonbongha III community to Ofonbongha IV community • Distribution within Ofongbongha communities via PVC pipe (7.3km) • Construction of 18 Kiosks in Ofongbonga communities • Pipe (HDPE) of 8.3km/180mm diameter) fromApiapum GLR to Ohana EWT Ohana • Pipe of (1.7km/160mm diameter) from Ohana EWT to Ohana community • Distribution wthin Ohana community via PVC pipe (3.5km) • Construction of 9 Kiosks in Ohana community Iyamoyong Pipe of (1.3km/200mm diameter) from Ohana EWT to Iyamoyong community Distribution wthin Iyamoyong community via PVC pipe (5.6km) Construction of 14 Kiosks in Iyamoyong community
The water supply system for Obubra and its surrounding communities is as follows: • Surface water abstraction from River Cross by means of raw water intake pumping station located at Adun beach; • The raw water will be pumped to a new treatment plant situated at 500m away from the intake. • On the treatment plant site, a new pumping station will be erected, housing three outlets to convey the clear water from the clear water tank (CWT) to the reservoirs of the scheme.
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o A low lift pumping station will provide water to a newly built elevated water tank (EWT) at Adun Beach. This concrete tank will provide water to the small community living in Adun Beach area. o A High Lift Pumping Station (HLPS) will supply water to a new EWT in Ofat, and in turn provide water to Ofodua, Ofotura, Ofat, Abebene, and Onyedama. o Another HLPS will allow conveying water to a Ground Level Reservoir (GLR) on the Apapium high point. • The GLR will be used as a transfer and storage reservoir and a LLPS will be constructed on the same site to allow the filling of the newly Elevated Water Tank (EWT) erected near by and supplying water to Apiapium, Ovonum and Ofukpa. • Two High Lift Pumping Station (HLPS) will be built on the Apapium Reservoir site those set will convey water coming from the Apiapum GLR to remote communities like Ohana and Mile I. • The Mile I EWT is designed to provide water to Obubra and its surrounding communities.
2.4.3 Okpoma Town Water Scheme ( Yala LGA Project Locations) The Yala LGA project area comprises of Okpoma town and 13 communities namely Abachor, Okpinya, Idigbo, Olachor, Adiero, Woleche, Utukpo, Utukpo Iponle, Iboko, Itega Udenyina, Okpodu and Igbekurekor. Figure 2.7 shows the locations of the proposed Water Supply Scheme facilities and the communities in which they would be located.
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Figure 2.7: Communities and water distribution network in Yala LGA
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Table 2.3 Project Components and Locations in Yala LGA
Location Project Components • Raw water intake station via Ductile pipes of (1.7km/450mm diameter) to a new Water Treatment Plant at • Supply of water via HDPE pipes of (0.05km/50mm diameter) from Water Treatment Plant (TP) to Udenyina Udenyina Elevasted Water Tank (EWT) • Distribution within Udenyina community via secondary pipes of (0.2km) • Construction of 1 kiosk in Udenyina community T Junction • Supply of water via DI pipes of (2.8km/450mm diameter) from TP to T Junction Woleche • HDPE pipes of (2.8km /110mm diameter) from T junction to Woleche EWT • Pipes of (1km/110mm diameter) from Woleche EWT to Woleche • Distribution within Woleche community via secondary PVC pipes (0.6km) • Construction of 2 kiosks in Woleche community Iboko • Pipes of (1.7km/75mm diameter) from Woleche community to Iboko community • Distribution within Iboko community via secondary PVC pipes (0.3km) • Construction of 1 kiosk in Iboko community Utukpo • Pipes of (0.6km /160mm diameter) from Woleche EWT to Utukpo • Distribution within Utukpo community via secondary PVC pipes (0.7km) • Construction of 2 kiosks in Utukpo community Utukpo Iponle • Distribution within Utukpo Iponle community via secondary PVC pipes (0.6km) • Construction of 1 kiosk in Utukpo Iponle Itega • Pipes of (3.2km/160mm diameter) from Utukpo community to Itega community • Distribution within Itega community via secondary PVC pipes (2.2km) • Construction of 5 kiosks in Itega community Okpoma • DI pipes of (4.6km 450mm diameter) from T junction to Okpoma EWT • Pipes of (0.5km/500mm diameter) from Okpoma EWT to Okpoma • Distribution within Okpoma community via secondary PVC pipes (19.4km) • Construction of 36 Kiosks in Okpoma community • HDPE pipes of (3.9km/160mm diameter) from Okpoma EWT to Local Government EWT Olachor • Pipes of (0.4km/250mm diameter) from Okpoma EWT to Olachor • Distribution within Olachor community via secondary PVC pipes (6km) • Construction of 15 kiosks in Olachor community Adiero • Pipes of (0.9km/180mm diameter) from Olachor to Adiero • Distrbution within Adiero community via secondary PVC pipes (0.5km) • Construction of 1 kiosk at Adiero community Idigbo • Pipes of (0.6km/180mm diameter) from Adiero community to Idigbo community • Distribution within Idigbo community via secondary PVC pipes (1.7km) • Construction of 4 kiosks in Idigbo community • Pipes of (1km/140mm diameter) from Idigbo commuity to Okpinya community • Construction of 1 kiosk at Okpinya community Abachor • Pipes of (0.1km/140mm diameter) from Okpinya community to Abachor community • Distribution within Abachor community via secondary PVC pipes (1.8km) • Construction of 4 kiosks in Abachor community • Pipes of (2km/200mm diameter) from LG EWT to Okpodu community • Distribution within Okpodu community via secondary PVC pipes (3.8km) • Construction of 9 kiosks in Okpodu community Igbekurekor • Distribution within Igbekurekor community via secondary PVC pipes (2.1km) • Construction of 5 kiosks in Igbekurekor community
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The water supply system for Yala LGA and its surrounding communities is as follows:
• Surface water abstraction from Onwe River close to Udenyina by means of raw water intake pumping station; • A new water treatment plant will be built 1,700m inland from the water intake pumping station ; • From the new water treatment plant, a High Level Pumping Station (HLPS) will be designed to supply water to 3 new Elevated Water Tanks (EWT) in Woleche community (on the South West), Okpoma community (in the center) and close to the LGA. In the height of Okpoma through a main pipe along the road to Okpinya to a T junction about 2km to these communities. From this junction, two pipes will be laid down: o The first will carry water to Woleche EWT straight south. o The second pipe will convey water to Okpoma EWT through a HDPE pipe of Ǿ450 and also convey water to EWT in the height of Okpoma close to LGA. • At proposed treatment plant site, a small submersible pump will be installed in the clear water tank to allow the filling of a small overhead reservoir to supply water to Udenyina community.
2.5 Project Activity
2.5.1 Intake and Low Lift Pumping Station
There will be an intake structure for water admission into the low lift pumping station through a vertical opening of 1.0 m width and with height from 17.5 masl to the top of the intake structure, about 12.5m. The construction work shall include wooden stop logs of total width adequate to isolate the opening to the suction chamber, and a total height of 12,500 mm, in separate and exchangeable sections. There shall be the construction of Steel track rack, constructed of separate and exchangeable sections of a total width of 1200 mm with clearance openings of 30 mm. Each section shall have a seating and a top plates, with individual hooking arrangement for lifting/lowering. The supply and installation/fixing shall include metal guides slots to be embedded in concrete including anchoring pieces.
There shall be a steel beam for lifting and lowering of any section of either stop log or trash rack. Also to be installed is a three vertical turbine pumps (2 in operations and 1 stand by) for outdoor installation.
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2.5.2 Raw Water Main The raw water main is to convey raw water from the LLPS to the aerator in the treatment plant. The pipeline shall be of Ductile Iron according to ISO std. 2531, pressure rating K9, with bell and spigot connections and will have a total length of about 1,475m.
• Internal lining: Cement mortar (ISO 4179)
• External coating: Zinc metal + Bitumen (ISO 8179)
The pipeline shall be provided with all necessary DI elbows, tees and other accessories for the installation of air valves and wash out valves. Each one of the the air valves and wash out valves shall be installed in a reinforced concrete covered 1.2 x 1.5 m chamber. Anchor blocks will be constructed against movements of line accessories (tees, elbows, reducers, etc.), at highest test pressure applied.
2.5.3 Access Road from Existing Roads to Intake and Treatment Plants
There will be road construction in Okpoma and Obubra project areas to enhance easy access to the intake and treatment plant sites. This shall entail earthwork activities including land clearing and stripping of top soils. Earthwork: Fill: The fill shall be compacted in layers of a compacted thickness of 150 mm or such other thickness as may be found necessary to achieve the required density. Cut: The top 150 mm shall be watered and compacted to 100% B.S standard compaction at optimum moisture content (OMC) 2.5.4 Treatment Plant The schematic drawing of the proposed treatment plants is presented in figure 2.8, while description of the work process follows.
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3. Flocculation 1. Pre-oxidation 6. Disinfection by
chlorine Anionic polymer Chlorination Tank
Chlorine gas Water supply 2. Lime Alum sulphate 5. Sand Filtration Conveyance system 4. Sedimentation Low lift pumping station
Slow mixing tank Settling Tank Sand Filter Fast mixing tank Chlorination
7. Clear water Tank Alum sulphate storage tank River Backwash
Extracted sludge
8. Sludge pumping station
11. Sludge disposal 9. Sludge thickening 10. Dewatering drying bed
Sludge disposal
Return water pumping Filtration water station Figure 2.8 Schematic Diagram of a General Treatment Plant
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Description of the proposed treatment work process
The water treatment works will be a conventional process made up of pre oxidation, flocculation/coagulation, settling tank/sedimentation, filtration and disinfection.
Stage 1: Pre-oxidation and pH adjustment
• Pre oxidation
The removal of metallic species in raw waters is possible by a physiochemical process: coagulation, flocculation and sedimentation. However, a pre oxidation by chlorine gas improves this phenomenon: this reagent, effective over a wide pH range, is useful to oxidize metals, especially Iron, and Manganese.
• pH adjustment
Lime shall be added to get the optimal coagulation –flocculation pH (around 8.5).
Stage 2: Coagulation The coagulation and flocculation processes facilitate the removal of total suspended solids (TSS), colloids and possibly precipitates of Iron and Manganese, which occurs in a final stage of solids liquid separation (or sedimentation).
Coagulation corresponds to the destabilization of colloidal particles brought about by the addition of a chemical reagent (a coagulant). Alum Sulphate will be dosed for this coagulation purpose.
Stage 3: Flocculation Flocculation process corresponds to the agglomeration of destabilized particles into microfloc, and later into bulky floccules which can be settled, called floc. The introduction of flocculants aid may promote the formation of flocs. The chosen and commonly used reagent is an anionic polymer (sold in powder form). This step requires a slow mixing tank (50 to 200 rmp).
Stage 4: Sedimentation The main purpose of settling is the separation technique most often used for TSS colloid, collected in the form of flocs after the coagulation and flocculation processes Sludge is composed of all the flocs settle on the bottom of the sedimentation tank. Sludge is extracted from this tank: 18h/day, and 7d/week; and will be sent to a special treatment for sludge, generated from water treatment.
Stage 5: Sand filtration The use of rapid sand filter is a technique widely used in drinking water The purpose of sand filtration is to clear water by a physical removal of suspended solids (sludge) by passing through a medium (or more). A two layers filter, using two different media characteristics, is preferred to avoid the screening effect of a heterogeneous layer and to promote the penetration of impurities throughout the entire dept of the filter.
The filter materials used have two layer and this are: anthracite and sand layer. The water flow is directed downwards, passing through the anthracite layer then the sand layer. The coarse particles are retained in the sand layer. A cleaning of the filter should be performed regularly to avoid clogging and bacteria growth. Backwashing is carried out with air and chlorinated waters. Earthguards Limited: 28 Sustainable Development Consultants
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Stage 6: Disinfection by chlorination In this stage, water flows from the sand filter to the chlorination tank. In this tank; chlorine is added to the water and allowed to settle for some time. Chlorine is usually used in this stage because it is commonly applied to water for activation for most harmful micro organisms.
Water Demand and Sludge treatment
Water demand in the project area is estimated based on year 2025 estimate. The present population (based on 2006 Population Census figures) and nature of agricultural water demand was major considerations. Table 2.4 presents the water demand estimate and actual land proposed for treatment plant in each of the three (3) project areas.
Table 2.4: Water Demand and Treatment Plant Land Take
ITEM DESCRIPTION PROJECT AREA ITIGIDI OBUBRA OKPOMA
Water Demand CuM/Day 4,893 5,102 10,280
Treatment Plant Land Area 275M x 200M 350M x 250M 275m x 200M
Sludge treatment must serve for the most to reduce these by products in volume. The low organic load of raw waters induces a low fermenting capacity: a digestion process or a conditioning process is not required.
The chosen sludge treatment consists of: • A thickening by settling : sedimentation and homogenization of raw sludge which produces a sludge that is still fluid;
• A dewatering on drying beds : natural drainage.
o Thickening
The thickening process corresponds to an increase in the concentration of total solids (sludge) collected in the settling tanks. The sludge laden suspension is fed into a tank, where it remains for a lengthy retention time so that the sludge is compacted. The more concentrated sludge is extracted from the bottom, while the supernatant liquid is drawn off the top.
o Dewatering on drying beds
The use of drying beds requires no energy input and does not require much attention (maintenance). Only the natural phenomena of evaporation, drainage, perspiration can increase the dryness of the sludge. • Sludge should be made toxic free for plant growth, and used as fertilizer for agricultural purposes.
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Outbuildings
Within each plant area the following ancillary structures/equipments shall also be considered as part of the project.
• A security post • A headquarter building for offices and workshop. • A chemical storage buildings (reagent building and chlorine building), • An electrical building. • A technical building. • The necessary ancillary works as internal roads, fence, drainage, telemetry, lighting et c
Table 2.5 describes the proposed treatment process, with particular emphasis on the activities on waste/sludge generation. The table indicates the daily water intake and sludge production for each of the three (3) LGAs of project influence. Water intake for the facility is approximated by the daily water production quantity. Similarly, quantities of reagents used for water treatment which generate waste are also given.
As seen table 2.5, when the proposed treatment plants are fully operational in 2035, Obubra LGA would generate the highest amount of sludge (1,291kg per day), then Abi LGA , with (637kg per day) and finally Yala LGA (573 kg / day).
Table 2.5: Estimation of total Sludge generated during the project period
Abi Obubra Yala Water Treatment Process Reagents Year 2025 2035 2025 2035 2025 2035
Water 5102 11887 10280 24517 4893 11815 Intake Lime 1.7 3.9 3.4 8.1 1.5 3.5 Preoxidation (m 3/ /day) Chlorine 67 157 136 324 59 139 (Kg/day) Primary Coagulation Alum 23.4 54.5 47.1 114.4 20.4 48.3 Treatment Sulphate Plant (kg/hr) Flocculation Aniomic 0.7 1.1 1.5 2.2 0.6 1 Polymer (Kg/hr) Sedinmentation Rising 0.6 1.4 0.6 1.5 0.6 1.4 Velocity (m/hr) Sand Filteration Back Wash 376 752 342 Water (m 3) Disinfection Chlorine 25 59 51 121 22 52 (kg/day) Sludge Thickening (Kg/day) 1004 1340 2,012 2717 904 1205 Treatment Dewatering on bed 36 74 33 Total Dry Sludge (Kg/day) 637 1,291 573
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3 BASELINE INFORMATION
This chapter gives an overview of the total project area of intervention and a visual imagery of the three (3) project sites in Cross River State. This imagery shows the various communities to be impacted by the project and various infrastructures of the proposed water scheme.
3.1 General overview
Nigeria is situated in West Africa and bordered to the north by Niger republic; north east by Chad; west by Benin; east by Cameroon and south by the Atlantic Ocean. The land mass of Nigeria is 923,768 sq km, and lies between latitudes 4 0 00’ N and 14 0 00’ N, and longitudes 2 0 50’ E and 14 0 45’ E.
Cross River state is a coastal in nature and located in the South Eastern Nigeria. This state was created in May 1967 from the former Eastern Region. It occupies 20,156m 2 and shares boundaries with Benue state to the north, Enugu and Abia states to the west, Cameroon Republic to the east and Akwa Ibom state and the Atlantic Ocean to the south.
Abi LGA
This project area comprises of Itigidi town and 12 communities (Table 2.1). Itigidi town serves as the headquarters of Abi L.G.A of Cross Rivers State. Itigidi town is located between latitude 05 0 53.083'N and longitude 8 0 8.25'E. The town is situated at upper course bank of the Cross River. Abi L.G.A had a population of 78,117 people (NPC, 2006). It has a clustered settlements pattern with scattering adjourning villages. The town accommodates a water pump station and treatment plant for the CRSWBL along the Old Park area and a reservoir along Hospital road.
Access to Itigidi town is through the Ugep Ediba Itigidi road that branches off the Calabar