Arecibo is a city and municipality on the northern coast of Puerto Rico, on the shores of the Atlantic Ocean, located north of Utuado and Ciales; east of Hatillo; and west of Barceloneta and Florida. It is about 50 miles (80 km) west of San Juan, the capital city. Arecibo is the largest municipality in Puerto Rico by area, and it is the core city of the Arecibo Metropolitan Statistical Area and part of the greater San Juan–Bayamón, PR Combined Statistical Area. It is spread over 18 barrios and Arecibo Pueblo. Its population in 2020 was 87,754.
Trujillo Alto is a town and municipality of Puerto Rico. Located on the northeastern costal plain on the boundary between the Northern Karst Belt and Sierra de Luquillo, it is north of Caguas and Gurabo, southeast of San Juan, and west of Carolina. Part of the San Juan metropolitan area, Trujillo Alto is spread over 6 barrios and the downtown area and administrative center of Trujillo Alto Pueblo.
Utuado is a town and municipality of Puerto Rico located in the central mountainous region of the island known as the Cordillera Central. It is located north of Adjuntas and Ponce; south of Hatillo and Arecibo; east of Lares; and west of Ciales and Jayuya. It is the third-largest municipality in land area in Puerto Rico. According to the 2020 US Census, the municipality has a population of 28,287 spread over 24 barrios and Utuado pueblo.
Lake Caliraya is a man-made lake situated in the municipalities of Lumban, Cavinti, and Kalayaan in Laguna, Philippines. Created in 1939, the lake has developed as a popular spot for water sports and outdoor recreation including fishing. Surrounding the lake are a number of resorts and vacation homes which cater to tourists.
Hirakud Dam is built across the Mahanadi River, about 10 kilometres (6.2 mi) from Sambalpur in the state of Odisha in India. It is the longest earthen dam in the world. Behind the dam extends a lake, Hirakud Reservoir, 55 km (34 mi) long. It is one of the first major multipurpose river valley projects started after India's independence. Hirakud Reservoir was declared a Ramsar site on 12 October 2021.
Guajataca River is a river in Lares, Puerto Rico. It is located on the northwest coast of the island. It flows from the south and drains into the Atlantic Ocean. The name was given by the original Taino inhabitants prior to the arrival of Christopher Columbus.
Lago Carite is a lake located in the municipality of Guayama on the island of Puerto Rico. The lake was created in 1913 and serves as a reservoir for irrigation and potable water.
Guajataca Lake, or Lago Guajataca, is a reservoir of the Guajataca River created by the Puerto Rico Electric Power Authority in 1929. It is located between the municipalities of San Sebastián, Quebradillas, and Isabela in Puerto Rico, and receives most of its water from the Rio Guajataca and Rio Chiquito de Cibao rivers. The lake primarily functions as a water reservoir as well as for recreational activities such as boating and fishing. Various species of fish such as peacock bass, largemouth bass, sunfish, perch, catfish, tilapia and threadfin shad can be found in the lake. The Guajataka Scout Reservation partially borders the southern portion of the lake. The dam at Guajataca Lake experienced a structural failure on September 22, 2017, due to the hit from Hurricane Maria.
Puerto Rico Highway 10 (PR-10) is a major highway in Puerto Rico. The primary state road connects the city of Ponce in the south coast to Arecibo in the north; it is also the shortest route between the two cities.
The Akiba Dam is a dam on the Tenryū River, located in Tenryū-ku, Hamamatsu, Shizuoka Prefecture on the island of Honshū, Japan.
Antonio S. Lucchetti was a Puerto Rican engineer and public servant, through whom comprehensive electric service was established in Puerto Rico via the Puerto Rico Water Resources Authority (PRWRA) and, later, via the public electric company, Fuentes Fluviales.
Lake Cachi is an artificial lake in central Costa Rica created by the Cachí Dam, an arch dam north of Tapantí National Park, to the east-southeast of Cartago in Cartago Province. The main town is Cachí, away from the east bank of the lake. Built in the 1970s, it was one of the first hydroelectric projects in Costa Rica. It has an installed capacity of 102 MW with three units of 34 MW capacity each.
The Pulangi IV Hydroelectric Power Plant, also known as the Pulangi Dam, is located on the Pulangi River near Maramag in Bukidnon province on the island of Mindanao in the Philippines. It uses two reservoirs, produced by damming the Pulangi River, to supply water to a run-of-the-river hydroelectric power plant; the power plant is capable of generating 255 megawatts (342,000 hp) of power. Construction began in 1982; the first two generators became operational in December 1985, with the last generator being commissioned in 1986.
Rio Abajo State Forest is a forest preserve in Puerto Rico owned by the Department of Natural Resources and one of the 20 state forests in the island. It was designated a National Natural Landmark in 1980 and constitutes an area of 3,590 acres. It consists mostly of subtropical wet and moist karst forest. Mogotes and sinkholes fill the landscape. The forest preserve is located in the municipalities of Arecibo and Utuado. In addition to its ecological value the forest also contains a number of archaeological sites.
Carraízo Dam is a concrete gravity dam located in the municipality of Trujillo Alto, Puerto Rico within the flow of the Río Grande de Loíza. Its construction was completed in 1953. Carraízo Dam impounds Loíza Lake which serves as Puerto Rico's main water reservoir.
The Northern Karst Belt is a limestone karst landscape located in the northwestern region of Puerto Rico. A karst is a topographical zone formed by the dissolution of soluble porous rocks, such as limestone, with features such as mogotes, canyons, caves, sinkholes, streams and rivers, all of which are common on this region of the island. Some of the island's main rivers, including its longest, traverse the karst and form some of the most distinctive Puerto Rican geographical features such as the Camuy caverns. Many of these rivers feed into and are important in the formation of many marshy areas such as the Caño Tiburones wetlands.
Lake Luchetti is a reservoir located in the municipality of Yauco, Puerto Rico, in the barrios of Naranjo and Vegas. The lake was formerly known as the Vegas Lake after the barrio it is located in. The lake was created at the junction of the Naranjo River and some minor streams with the Yauco River under Puerto Rico Electric Power Authority's (PREPA) Yauco Project in 1959 and revitalized for further hydroelectric use in 1991. The lake is named after Antonio S. Luchetti, a Puerto Rican engineer who was vital in the development of the hydroelectrical energy system in Puerto Rico.
The Cooperativa Hidroeléctrica de la Montaña is the first electric energy cooperative in Puerto Rico. Their purpose is to generate and distribute cost effective and resilient energy from renewable sources for the communities and businesses from the Adjuntas, Jayuya, Lares, Maricao and Utuado municipalities. The efforts of the Cooperativa Hidroeléctrica de la Montaña are directed to guarantee cost effective, clean and resilient energy to the residents of these communities, using a democratic model.
