The Omkareshwar Damis built on the Narmada River in Madhya Pradesh, India. The dam is located near the town of Omkareshwar in the Khandwa district. It is one of the major dams built on the Narmada river and is used for irrigation, hydroelectric power generation, and providing drinking water to nearby areas. 

The construction of the dam began in the year 1955 and it was commissioned in the year 2005. The dam is built across the narrow gorge of the Narmada river and it is one of the major tourist attractions in the state of Madhya Pradesh. The dam is also an important pilgrimage spot for Hindu devotees as it is situated near the Omkareshwar Temple.

The main purpose of the Omkareshwar Dam is to provide irrigation, hydroelectric power generation, and drinking water to the nearby areas. The dam has a height of 131.82 meters and a length of 2,091 meters. The dam has a catchment area of 45,155 square kilometers and it has a live storage capacity of 12.22 billion cubic meters. The dam has a total installed capacity of 520 MW and it has 8 units of 65 MW each.

The dam is also an important pilgrimage spot for Hindu devotees as it is situated near the Omkareshwar Temple. The dam is built across the narrow gorge of the Narmada river and it forms the reservoir of Indira Sagar Dam, which is the largest dam in Madhya Pradesh. The Omkareshwar Dam also has a beautiful garden and a park which is a popular spot for tourists.

The construction of the Omkareshwar Dam was not without its controversies and challenges. 

One of the major issues faced during the construction was the displacement of a large number of people living in the area. According to estimates, around 40,000 people were affected by the construction of the dam and were displaced from their homes and lands. Rehabilitation and compensation for the displaced people were a major concern and the government faced criticism for its handling of the issue.

Another major issue faced during the construction was the environmental impact of the dam. The construction of the dam led to the submergence of a large area of forest and wildlife habitat. This led to concerns about the impact on the local ecosystem and the loss of biodiversity in the area.

Despite these challenges, the Omkareshwar Dam has been instrumental in providing irrigation, hydroelectric power generation, and drinking water to the nearby areas. It has also helped in controlling floods in the Narmada river and has been a major contributor to the development of the region. The dam is also a popular tourist spot and a major pilgrimage destination for Hindu devotees.

In conclusion, The Omkareshwar Dam is a significant hydroelectric dam on the Narmada River in Madhya Pradesh, India which serves multiple purposes such as irrigation, hydroelectric power generation and providing drinking water. It was completed in 2005 after a construction period of 50 years and faced several challenges such as displacement and environmental impacts but it's still a major contributor to the development of the region