The Study on Disaster Prevention in the Bogotá Metropolitan Area in the Republic of Colombia 2.7 Distribution of Building and Infrastructure/Lifeline 2.7.1 Distribution of Buildings 1) Buildings (1) Building distribution The building data used for the Study is from the cadastral data of both Bogotá City and the eight municipalities in Cundinamarca. Every item of information is collected separately because it is managed by different organizations. Cadastral data is collected for the property tax collection purposes and it is the most reliable data for building classification. In the Study the building data have been classified based on the structure and number of stories of the buildings. According to the cadastral classifications, the buildings can be classified into four categorizes: wood, prefabricated, masonry and RC frame structures. The data also provide the number of stories of buildings. Table 2.7.1. shows the distribution of buildings in the Study Area. Table 2.7.1 Number of Buildings in the Study Area Wood, Masonry RC Frame Building Locality/ Prefabricated Total Building Unknown Total Municipality for Analysis More than 3 All Estrato Estrato 1, 2 Estrato 3, 4 Estrato 5, 6 Upto 3 Stories stories Usaquén 1,722 7,595 18,077 7,817 1,904 2,936 40,051 4,615 44,666 Chapinero 921 2,708 3,4923,748 2,433 2,806 16,108 2,937 19,045 Santa Fe 1,671 9,953 2,027 0 1,598 601 15,850 2,648 18,498 San Cristobal 2,912 44,371 6,231 0 470 172 54,156 1,094 55,250 Usme 4,026 31,081 194 0 133 8 35,442 11,942 47,384 Tunjuelito 427 12,708 4,556 0 621 97 18,409 2,003 20,412 Bosa 2,449 43,850 2,794 0 699 62 49,854 7,038 56,892 Kennedy 3,310 40,154 43,024 0 4,342 1,220 92,050 6,188 98,238 Fontibón 893 3,824 19,9040 1,633 489 26,743 2,122 28,865 Engativá 1,689 15,652 61,130 0 3,531 1,201 83,203 5,986 89,189 Suba 4,334 41,262 27,3677,782 3,097 1,744 85,586 3,409 88,995 Barrios Unidos 553 81 24,063 476 3,194 710 29,077 1,683 30,760 Teusaquillo 186 128 12,972364 1,699 1,746 17,095 2,628 19,723 Mártires 488 1,041 10,758 0 2,667 678 15,632 934 16,566 Antonio Nariño 257 768 11,100 0 1,194 358 13,677 600 14,277 Puente Aranda 539 607 32,497 13 3,880 546 38,082 3,538 41,620 La Candelaria 507 1,540 369 0 338 110 2,864 986 3,850 Rafael Uribe 2,012 26,600 21,928 0 939 200 51,679 1,632 53,311 Ciudad Bolívar 6,996 57,066 1,685 15 634 109 66,505 14,384 80,889 Subtotal 35,892 340,989 304,168 20,215 35,006 15,793 752,063 76,367 828,430 Chia 2,388 2,542 12,527323 315 16 18,111 0 18,111 Cota 988 2,086 1,35520 165 17 4,631 0 4,631 Facatativa 1,864 3,663 9,038 35 185 32 14,817 0 14,817 Funza 1,239 2,293 5,453 50 195 16 9,246 0 9,246 La Calera 530 546 3,056 613 47 8 4,800 0 4,800 Madrid 1,361 3,749 4,356438 333 12 10,249 0 10,249 Mosquera 897 2,921 3,529166 262 2 7,777 0 7,777 Soacha 3,929 18,682 33,946 588 483 302 57,930 0 57,930 Subtotal 13,196 36,482 73,260 2,233 1,985 405 127,561 0 127,561 Total 49,088 377,471 377,42822,448 36,991 16,198 879,624 76,367 955,991 2-100 Chapter 2 Existing Situation The total number of buildings in the Study Area is 955,991 based on the cadastral data. There are 828,400 buildings in Bogotá City and 127,600 buildings in Cundinamarca’s eight municipalities. Masonry structure buildings share 81.3% of the total buildings, while that of RC frame buildings is only 5.6%. The Study Team found that the “unknown” structure buildings are distributed in the southern part of Bogotá City. However, it was impossible to identify their structure type even though a field survey was conducted. The discussion with the cadastral office in Bogotá City concluded that “unknown” structure buildings cannot be classified by cadastral classification. “Unknown” structure includes weak structure buildings, such as temporary housing, illegal housing etc. Therefore, “unknown” structure buildings are not included in the damage analysis. For the distribution of housing stock, huge housing accumulation is found in Estrato 1 to 4, which account for 79% of the buildings in the Study Area. The most building accumulation is found in Kennedy of more than 98 thousand, or 10.3%, of total buildings, followed by Engativa, Suba and Ciudad Bolivar. Of the eight municipalities in Cundinamarca, Soacha has more than 57,000 buildings followed by Chia of 18,111. (2) Housing unit distribution The cadastral and IGAC data provide housing unit data. Housing unit is defined as a household unit and used only for residential purposes. The number of housing units in the Study Area is more than 1.3 million. The number of housing units in Bogotá City is 1.2 million and 129,000 in the eight municipalities. The distribution of residential buildings shows that the three localities of Suba, Engativa and Kennedy account for more than 10% of housing units. Of the eight municipalities, Soacha has more than 5% of housing units. The summary of the housing unit data is shown in Table 2.7.2. 2-101 The Study on Disaster Prevention in the Bogotá Metropolitan Area in the Republic of Colombia Table 2.7.2 Summary of Housing Units Locality/ Number of Total Housing Distribution Municipality Building Unit (%) Usaquen 44,666 118,697 8.9% Chapinero 19,045 51,142 3.8% Santa Fe 18,498 24,234 1.8% San Cristobal 55,250 60,336 4.5% Usme 47,384 43,997 3.3% Tunjuelito 20,412 27,566 2.1% Bosa 56,892 59,945 4.5% Kennedy 98,238 143,784 10.8% Fontibon 28,865 48,792 3.7% Engativa 89,189 143,973 10.8% Suba 88,995 165,348 12.4% Barrios Unidos 30,760 36,565 2.8% Teusaquillo 19,723 41,852 3.1% Los Martires 16,566 15,999 1.2% Antonio Aranda 14,277 16,567 1.2% Puente Aranda 41,620 48,324 3.6% Candelaria 3,850 5,615 0.4% Rafael Uribe 53,311 59,993 4.5% Ciudad Bolibar 80,889 87,279 6.6% Sub-Toatal 828,430 1,200,008 90.3% Chia 18,111 15,228 1.1% Cota 4,631 3,145 0.2% Facatativa 14,817 14,182 1.1% Funza 9,246 8,027 0.6% La Calera 4,800 4,984 0.4% Madrid 10,249 7,259 0.5% Mosquera 7,777 5,651 0.4% Soacha 57,930 70,208 5.3% Sub-Toatal 127,561 128,684 9.7% Total 955,991 1,328,692 100.0% Source: JICA Study Team, from Cadastral and IGAC data 2.7.2 Distribution of Infrastructure 1) Infrastructure Conditions (1) General This Study includes infrastructures and lifeline facilities as exist in the Study Area. The infrastructure is classified into roads, bridges, airports and railways. Electricity supply facility, water supply facility, gas supply facility and telecommunication facility are included in the lifeline facility. (2) Road facility conditions A. Existing road network in the study area a) Administrative institution of roads and bridges National roads outside of Bogotá City are under the jurisdiction of the Ministry of Transport. The Instituto Nacional de Vías (INVIAS) under the ministry is responsible for the construction and the maintenance of these national roads. Municipal roads are under the jurisdiction of Bogotá City or each municipality. Prefectural or departmental, roads are under the jurisdiction of Cundinamarca. 2-102 Chapter 2 Existing Situation All the roads in Bogotá City area are under the jurisdiction of Bogotá City. The Urban Development Institute (IDU) under Bogotá City is responsible for the construction and the maintenance of these city roads. The eight municipalities have responsibility of roads inside of their cities. Cundinamarca Prefecture has responsibility for the roads connecting to national roads and municipality roads. Table 2.7.3 shows the summary of administrative institution of roads and bridges. Table 2.7.3 Administrative institution of Road and Bridges Administrative Institution Road Classification Bogotá Eight municipalities Urban area Rural area National Road - - INVIAS Municipal Road IDU Each City - Prefectural Road - - Cundinamarca b) Road network in Bogotá City The trunk road network in Colombia is formed by two longitudinal trunk roads and three lateral trunk roads. Two national trunk roads, No. 25 and No. 45A, connect to the center of Colombia as the longitudinal trunk road network from south and north. Three national trunk roads, No.40, No.50 and No.60, are located at the center of Colombia as the lateral trunk road network from east and west. Four trunk roads that connect with Bogotá City make up the radial road network of Bogotá City. The four national roads connecting Bogotá City and other municipalities are as follows: - National Road No.