ESTUDIOS Y ASESORIAS

This Project included the field work necessary to design the crossing both in plan view and at depth, considering the different geologic strata being crossed, plus the DESIGN DRAWINGS AND THE ELABORATION OF A DETAILED environmental Plan, including Monitoring during construction and operation and Contingency Plan for possible oil spills.

ENVIRONMENTAL SUPERVISION OF THE DREDGING OF THE MAGDALENA RIVER BETWEEN BARRANCABERMEJA AND REGIDOR- (700 Km) - (jul-95 / Nov-97)

Environmental engineering supervision of the Dredging Project in a 700 Km reach along the Magdalena River, Colombia’s largest river System and one of the 20 largest rivers of the World. It included the supervision of four medium size dredges and their support crew and equipment. Monitoring was carried for water quality control, disposal of dredging material and supervision of the construction of stabilizers and structures to close river branches. ESTUDIOS Y ASESORIAS was the leading Company in a joint venture with AMBIO-TEC Ltd., for the ministry of transportation.

HIDRAULIC MODELS OF SEDIMENTATION BASINS AND IRRIGATION INTAKE STRUCTURES (Dic-94 / Nov-95)

Design, construction and operation of several large hydraulic models in the Laboratory of the university of the Andes in Bogotá, in order to study the optimization of several sedimentation basins and river intakes in Irrigation Districts in Colombia. The work was done for the National land reclamation Authority, INAT, under financing by the World Bank.

SEDIMENTOLOGIC STUDY OF THE NEGRO-GUAYURIBA RIVER SYSTEM (Mar-95 / Dic-95)

This Project included the field work necessary to obtain the volumes of sediment produced by the different watersheds contributing water to the Quetame, Guayabetal and la Rosa Hydro electric Stations proposed by the Electric utilities Company of the city of Bogotá, in order to estimate the useful life of the reservoirs and determine the technical feasibility to build the Projects. It also included the determination of a Management Plan for the watersheds, including erosion control.

ZONIFICATION OF FLOODWAYS IN THE TUNJUELO, SALITRE AND FUCHA RIVER SYSTEMS IN THE CITY OF BOGOTA (Feb-96 / Feb-98)

This Project was made for the Aqueduct Company of Bogotá and included the hydrologic, hydraulic and geologic studies necessary to establish zoning fringes according to the letter of the law in order to provide an environmental zone of protection of the urban waterways system of Bogotá.

ENVIRONMENTAL IMPACT STUDY OF THE GOLD DREDGING OPERATION OF ATACO - TOLIMA (feb-96 / Nov-96)

This Project included the field and office work necessary to present the Ministry of the Environment of Colombia with a comprehensive report indicating the potential impacts of a large dredge mining operation in the bed and flood plain of the Saldaña River, one of the largest tributaries of the Upper Magdalena Basin. This was a very controversial Project since the Project is located in the Upper Saldaña River and there are large irrigation districts in the lower Saldaña that could be affected by sediment production at the mining site. The report also indicated the ways to minimize impacts and make the operation feasible, and permitted the Ministry to declare the Project Technically and environmentally feasible, after a detailed review of the report by a Canadian Company hired to review the work previous to approval by the Ministry. The work was done for MINEROS EL DORADO of Medellín.

ENVIRONMENTAL STUDY OF ALTERNATIVE LAYOUTS FOR THE CITY OF SOCORRO BY PASSS HIGHWAY (Nov-97 / Dic-97)

Included the physical, biological and social characterization of the area of influence of a mayor road reach designed to avoid the traffic to pass by the City of Socorro, second largest of the state of Santander in Colombia. It included the analysis of several alternatives and the selection of the optimal one from the Environmental point of view. It was done by contract with the larger consulting firm CEI Ltd. For the Ministry of Transportation of Colombia.

E.I.A. FOR THE PERIPHERAL CARTAGENA HIGHWAY (Jan 1998)

Environmental impact Assessment of the construction of the major road to surround the Bay of La Virgen in Cartagena de Indias, with a protective fringe to avoid the continuing invasion of the bay by fill and construction from private interest in violation of the Colombian law. It was a controversial Project since most invaders were poor people moving into the city with few economic resources. It included the physical biological and social characterization of the area of influence, the analysis of several alternatives and the selection of the optimal alternative from the Environmental point of view, plus the elaboration of a detailed Environmental Management Plan for the construction and operation of the Project.

FLOOD CONTROL PROJECT FOR THE SALAO AND PLATANAL URBAN CREEKS IN THE CITY OF SOLEDAD - ATLANTICO (August-96 / Sep-97)

This Project included a complete diagnosis of the flood problems in the important peripheral urban area of Barranquilla, Colombia’s second largest city with over two million inhabitants. The zone is very important since it lies near the International airport and its main access road. The work comprised all the physical, biological and social studies, the design of major river works, including flood diversion channels, to alleviate the flooding problems, detailed plans for the evacuation of a part of the population living in the floodways, and the final plan for the drainage and wastewater network of the urban area, including the relocation of major roads, design of urban bridges, and the proposal of a new route and specifications for the airport access highway. It included also the environmental impact study and the environmental management plans for the entire Project. Done for FONADE, the Government’s main financial bank, and the township of Soledad, in Barranquilla.

HIDROSEDIMENTOLOGIC AND WATER QUALITY FIELD MONITORING CAMPAINS, IN THE CANAL DEL DIQUE AND ITS LAGOONS SYSTEM (Oct-99 / Ene 2001)

This important Project was done directly for the Ministry of the Environment in Colombia and is a part of a major project to improve the canal del Dique, one of the major navigation waterways in Colombia, connecting the Magdalena River basin with the important city of Cartagena de Indias, one of Colombia’s five larger cities. The work included the land and sea surveys of all major river channels, the field determination of water and sediment discharges from the river into the canal and from it to the coastal lagoons and swamps that surround the Canal, conforming a Deltaic system of great ecological and economic importance in the region, and also the measurement of water quality parameters in the entire system, and the production of a comprehensive report to characterize the hydrological, hydraulic and water quality situation in the area.

ENVIRONMENTAL IMPACT STUDY FOR THE GOLD Dredging EXPLOTATION IN EL BAGRE - ANTIOQUIA (Feb-2000 / Jul-2000)

This Project included the field and office work necessary to present the Ministry of the Environment of Colombia with a comprehensive report indicating the potential impacts of a large dredge mining operation in the bed and flood plain of the Nechí River and its tributaries, in the lower Cauca-Magdalena Basin. This Project has been going continuously since just before the beginning of the 20th century, and started as a private U.S. undertaking. In 1974 it was bought by Miners of Antioquia, a Colombian mining concern, and it has been operating continuously but not without environmental problems. These problems finally required the intervention of the Ministry of the Environment, which ordered the elaboration of a comprehensive Environmental Impact Study and an Management Plan in order to allow the exploitation to continue. The Studies were dully approved and the Project is now operating under the conditions determined by this Plan, being one of the three largest mining operations in Colombia, after the Cerrejón Coal Project, (largest open pit coal mine in the world), ant the Cerromatoso Iron and Niquel Mine. ESTUDIOS Y ASESORÍAS was also instrumental in the Implementation of the Management plan and its supervision along the first three years.

SUPERVISIÓN OF DESIGN STUDIES FOR THE MODERNIZATION OF THE MASTER SANITATION PLAN OF THE CITY OF BOGOTÁ (Oct-2000 / April 2003)

This is a major engineering supervision work done for the Aqueduct Company of Bogotá, along a period of three and a half years, to control the quality and adequacy of a major engineering effort to modernize the Master Sanitation plan of the City of Bogotá. It included the design of river improvements in the Bogotá River, to avoid flooding and to allow water levels that permit adequate drainage of the drainage basin of the city and its rainfall sewer network, the redesign of nearly two thirds of the city waste water mains, including the design of underground tunnels, pumping stations and concentration of flows towards the site of a major water treatment Plant, and the redesign of the system of three treatment plants previously proposed, to optimize the economic impact of the project to the city. The company in charge of the designs is HMV S.A. a major Civil Engineering firm and a part of a Colombian –American consortium of companies.

SUPERVISIÓN AND IMPLEMENTATION OF AN ENVIRONMENTAL MANAGEMENT PLAN FOR THE GOLD DREDGING OPERATION IN EL BAGRE - ANTIOQUIA (Mar.-2002 / Mar.-2003)

This was the continuation of the Project for adequate environmental management of the MINERS OF ANTIOQUIA S.A. operation in El Bagre, after the firm realized the E.M.P. It consisted in the supervision of the implementation of the plan, the creation of an environmental division within the company, and the instruction and monitoring of performance of the division for the first three years.

HIDRAULIC STUDY OF THE COASTAL LAGOON OF EL TOTUMO – STATE OF ATLÁNTICO (August 2002 / Dic. 2002)

This work was done for the regional Natural resources Corporation of the state of Atlantic – CRA, in the Caribbean Coast of Colombia, and for the ministry of the environment. It consisted in the hydrologic and hydrodynamic modeling of a major coastal lagoon in the Caribbean Coast, with the interaction of the sea and the affluence of more than 10 tributary creeks and rivers.. It included the Sedimentological study to prevent siltation of the lagoon, and the use of the ELCOM hydrodynamic model of the university of Western Australia, with whom Estudios y Asesorias has established technological exchange ventures for these type of projects.

DESIGN OF A BY PASS STRUCTURE FOR THE SAN RAFAEL RESERVOIR ( 2004)

The Project consisted in the design of a by pass structure to divert the waters of the Teusacá River around the San Rafael Reservoir; this reservoir, constructed by damning the Teusacá River is used as a temporary storage for the Chingaza Aqueduct that supplies 70% of the city of Bogota´s fresh water requirements, (for a popullation nearing ten million inhabitants). Due to the polluted characterístics of the small river, as opposed to the very pure mountain water brought from the Chingaza basin in the mountains, the desition to by pass the river waters around the reservoir had to be evaluated, and a proper design studied to divert the waters. The design included a diversión dam, and a 10 Km channel around the dam to carry up to 10 cubic meters per second of discharge, with an overflow weir towards the reservoir in case of a greater flood than the design level. The study included technical, economical and environmental evaluation of the alternatives, the selection of the optimum project and final design drawings for the construction of the optimum project..

WASTE WATER QUALITY MONITORING PROJECT ( 2005-06)

Extensive monitoring of the Hydrologic System and the industrial discharges from productive sector enterprises in the city of Bogota, by means of sampling, gauging point discharges, and measuring water quality at the injection points into the city´s waste water drainage network, including rivers, canals and wetlands of the city, plus the registry of information and stablishment of a proper data base, with the purpose of checking that these enterprises are fulfilling environmental regulations referring to the quality of efluents into the natural and artificial drainage systems. This work is presently being carried out for the Aqueduct Company of the city of Bogotá, and the Urban Environmental Agency of the same city.

RECENT PROJECTS FOR THE OIL INDUSTRY (1999 - 2005)

One of the company’s major fields of endeavor in recent years has been the civil and Environmental work for the oil industry: Some of the projects in this area have been :

• Environmental management plan and modernization of the Contingency Plan for oil pipelines between Ayacucho and Coveñas, (middle of Colombia to the Caribbean Coat - 12" and 8” pipelines).

• Design of the alternate rout of the Galán-Ayacucho-Coveñas line in the La Mata sector, Municipality of La Gloria, Cesar. Included the design of the line, the Environmental study and the Environmental management plan.

• Design of the alternate route of the Ayacucho-Coveñas 12” pipeline in the "El Zorro" site, Municipality of Mompós. Included the design of the line, the Environmental study and the Environmental management plan.

• Design of the fluvial crossing of the Cauca River by the Medellín – Cartago oil duct, in la Pintada, Antioquia. Included the design of the crossing, the Environmental study and the Environmental management plan.

• Environmental Impact Study for Sand Extraction Operation in the Reynera Branch of the Arauca River. For Occidental Petroleum – Colombia.

• Redesign of the Puerto Salgar - Cartago oil duct, between the Pereira Pumping plant and the La Vieja River crossing near the city of Cartago. Included the design of the line, the Environmental study and the Environmental management plan.

• Environmental Management Plan for the continuing operation of the Cartago Pumping Station. Elaboration of the Contingency plan for the Station according to the new rules and the new ECOPETROL – ICP Master plan for Colombia.

• Design of erosion control works for the Regidor crossing of the Magdalena River and geological and Geomorphological studies of the Quitasol and Loba, branches of the river, in the right of way of the Galán - Ayacucho – Coveñas oil duct.