Development of Rewas Port Detailed Project Implementation Report
Total Page：16
File Type：pdf, Size：1020Kb
Development of Rewas Port Detailed Project Implementation Report - Executive Summary Rewas Ports Limited November 2009 Detailed Project Implementation Report - Executive Summary Prepared for Rewas Ports Limited Prepared by AECOM India Private Limited 9th Floor, Infinity Tower – ‘C’, DLF Cyber City DLF Phase II, Gurgaon, Haryana, India, Pin 122 002 Tel.: +91 124 2816000 Fax: +91 124 2816008 www.aecom.com November 2009 © AECOM India Private Limited 2009 The information contained in this document produced by AECOM India Private Limited is solely for the use of the Client identified on the cover sheet for the purpose for which it has been prepared and AECOM India Private Limited undertakes no duty to or accepts any responsibility to any third party who may rely upon this document. All rights reserved. No section or element of this document may be removed from this document, reproduced, electronically stored or transmitted in any form without the written permission of AECOM India Private Limited The capital cost estimates prepared for the Phase 1 Development of the Rewas Port project have been arrived at based upon site information, appropriate assumptions wherever required and the database available with the Maunsell for the similar projects. These site information and assumptions are subject to many factors that are beyond the control of the Maunsell; and Maunsell thus make no representations or warranties with respect to these estimates. Table of Contents 1.0 Introduction 1 2.0 Site Conditions 2 3.0 Traffic Potential and Forecast 4 4.0 Phase 1 Development Plan 5 5.0 Engineering details 9 6.0 Mechanical Handling System 14 7.0 Infrastructure and Port Facilities 15 8.0 Environmental Compliance 19 9.0 Cost Estimate and Implementation Schedule 20 Appendix 1 21 Field Investigations and Studies Organised by RPL 21 Detailed Project Implementation Report For Phase 1 Development of Rewas Port - Executive Summary November 2009 1.0 Introduction 1.1 Project Background Rewas port is located south of Karanja Fishing Harbour in Dharamtar Creek (Latitude 18°49’N, Longitude 72°56’E), in the intertidal zone of Rewas Headland, District Raigad, on the West Coast of Maharashtra. Rewas is located close to two of the major ports of India namely Mumbai Port Trust (MbPT) and Jawaharlal Nehru Port trust (JNPT). A study of the hydrography and topography around the Mumbai region revealed that Rewas Headland protected by Mandve land mass on southwest provides a suitable location, where a port could be developed. The area is thinly populated and located in the close proximity of National Highway and Railway networks. The site prima-facie fulfils the basic requirements for port development. Index Map Showing the Location of Rewas Port The Rewas Port, planned as a deep water all weather multipurpose port, is being developed by M/s Rewas Ports Limited (RPL) under a Build, Own, Operate, Share and Transfer (BOOST) concession agreement signed with the Maharashtra Maritime Board. The concession is for a period of 50 years. RPL is the SPV for the development, management and operation of the Rewas-Aware Port. While the agreement is for development of port facilities at Rewas and Aware, in the initial phase, development on Rewas side has been taken up for implementation. The ports are invariably developed in phases as and when the traffic builds up. The Rewas Port is also planned to be developed in 2-3 phases over the Master plan horizon. The Phase 1 on Rewas side envisages development of 9 berths to handle container, dry bulk, liquid bulk, general cargo and automobile cargo. RPL appointed Maunsell AECOM for the preparation of Detailed Project Implementation Report (DPIR) for the Phase 1 Development of Rewas Port. Detailed Project Implementation Report For Phase 1 1 Development of Rewas Port - Executive Summary November 2009 2.0 Site Conditions 2.1 Setting of Rewas Port The main tidal creeks along the coastline of Mumbai/ Raigad region, from south to north, which are potential sites for port development are Revadanda creek (Kundalika River), the Mumbai Harbour region consisting of Dharamtar creek (at the confluence of Amba River, Patalganga River and the Karanja creek), Thane creek, Mahim Bay, Malad Creek, Manori Creek and Bassein Creek. Among these creeks, the Dharamtar creek appears most promising from the point of view of availability of water and land area and offers a naturally protected water area, where a port could be developed. The water area is protected from the fury of waves by the Mumbai headland at the northern end and by Thal Knob/Navkhar Headland at the southern end. An overview of the bathymetry reveals that the 5m contour is located at about 5 km from the high water line. The 2m contour extends through the entrance of Dharamtar Creek for a distance of about 7 km from the entrance and thereafter, the creek is very shallow for a small stretch to the east of Rewas Bunder. The water area is characterized by rocky outcrops and wide intertidal area to the west of Rewas Bunder, and tidal flats extending to the low water line to the east. The area beyond the eastern limit of the Port of Mumbai falls within the limit of Rewas Aware (Thal) Port. Karanja Fishing Jetty is located at the mouth of the Karanja creek at the northern extremity of the water area, while Rewas Bunder is located on the southern side of the water area. The site for the proposed port is located at the west of Rewas Bunder by developing facilities on the wide tidal area. The proposed port and the channel are outside of the Dharamtar creek and also away from the approach to the Dharamtar creek as well as the Karanja creek. 2.2 Meteorological and Oceanographic Data The mean of the highest air temperature recorded in Mumbai is 35° C in the months of March, April and May while the mean lowest is 16° C recorded in the month of January. Mean daily maximum and minimum temperatures are 31° C and 24° C respectively. Mean yearly relative humidity at 0830 hours is 77% while the same at 1730 hours is 71%. The monthly average is lowest in February (62%) and highest in July to September (85%). The average yearly rainfall is about 2098 mm, of which 1965 mm (93.66%) occur during June to September. Usually maximum monthly rainfall occurs in July. The average monthly rainfall in July is 709 mm. There is practically no rainfall from December to April. Throughout the year visibility is good as the region has zero fog days and therefore there are no constraints to the navigation on this count. In general the west coast of India is less prone to cyclonic storms compared to the east coast. Based on the analysis of IMD data, the number of cyclonic events per annum works out to be 16, varying from a minimum of 8 to a maximum of 18. It is observed from the tracks of the cyclones in the Arabian Detailed Project Implementation Report For Phase 1 2 Development of Rewas Port - Executive Summary November 2009 Sea from 1877 to 1992 that only 10 storms endangering the Mumbai coast have occurred in the above said period i.e. at a frequency of once in 12 years. The observations on salinity showed that there exists heavy stratification for salinity during spring as well as neap tides. The salinity at the bottom was found to be much higher than the surface water. This may be attributed to the presence of saline water having higher density at the bottom. The tides in the Mumbai region are of the semi-diurnal type i.e. characterised by occurrence of two High and two Low Waters every day. The tidal levels at Mumbai i.e. Rewas with respect to Chart Datum (CD) varied from a minimum of +0.8 m CD to maximum of about +4.4 m CD. However, the recorded HHWL at Mumbai harbour is +5.38m CD. The predominant wind direction is from West to Southwest, whereas the wind speeds of 21 to 27 knots occurs for about 29% of the time during the monsoon months of June, July and August. The analysis of wave heights shows that the predominant directions of waves in the deep sea are from SW to NW. It is observed that during the pre-monsoon period (January to May) over 92.93% of waves are less than 3 m in height. During the monsoon period (June to September) wave heights are less than 3 m for 70% and less than 5 m for 97% of the time. During the post monsoon period (October to December) wave heights are less than 3 m for 98.1% of the time. The predominant wave directions are in the NW quadrant for pre-monsoon period, from W to SW in the southwest monsoon and from NE to NW in the post-monsoon period. The currents in the Mumbai region in the near shore zone are tide induced with reversal at high and low waters. The current strengths are of order of 0.4 m/s to 1.7 m/s (0.8 to 3.4 Knots). Bed sample analysis showed that D50 size of bed material collected near proposed port area is 0.04 mm, while the corresponding value of bed material collected at mouth of Amba River is 0.017 mm. 2.3 Geotechnical Data RPL commissioned the geotechnical investigations through M/s Fugro Geotech Ltd. Mumbai (Fugro). The outcome of investigations reveals that in general, the stratification in inner approach channel is silty sand over a layer of stiff silty clay, followed by moderately weathered basalt.