50 establishment of a short list of consultants for conducting feasibility studies of the downstream Bagre hydro-electric power plant, (iii) the recruitment of companies for the construction of the Ouagadougou-Ouahigouya, Kaya-Dori and Kongoussi-Djibo inter-connections, the signing of memorandum of understanding between the countries concerned by the "Dorsale Nord" power inter-connection estimated at 59 billion CFA francs, and (v) supporting the booming mining sector, notably the proposed connection of Mana Gold Mines and Banfora Gold Project to the SONABEL network. With regard to hydrocarbons, the process of updating the feasibility study of the Bolgatanga-Ouagadougou pipeline project effectively started. 4.2.5. Sanitation In the area of sanitation, according to the national survey on access of households to family sanitation facilities conducted in 2011, the rate of access to family sanitation in 2010 was 3.1% at the national level. In other words, out of 33 households, only one household has access to family sanitation. In terms of environment of residence, the rate was 21% in urban areas as against 0.8% for rural areas. In 2012, the rate of access to urban sanitation was 27%, representing an increase of 3 points compared to its level of 2011 for additional served population of 180,000 persons. Investments in the area of sanitation amounted to CFAF 3.430 billion. Concerning sanitation in rural areas, 26,943 family latrines were constructed in 2012 at a total cost of CFAF 3.353 billion. This facilitated access to sanitation for an additional 269,430 people. Table 2: Rate of access to sanitation in rural and urban areas in % Year 2010 2011 2012 Rate of access to 21.49 24 27 sanitation in urban areas (%) Rate of access to 0.8