Duncan’s lake levels have consistently stayed at or slightly below normal levels the past few years.

On May 12, the City Council was presented with a spreadsheet and graph of the lake levels for the nine years.

Duncan Public Works Director Scott Vaughn said that, generally, the lake levels have been up the last couple of years.

This is especially true for the past few weeks because of the rainfall in the area, Vaughn said.

“We don’t want the lake levels constantly above normal because that will cause damage to the dam,” Vaughn said. “Each lake has an automatic drawdown structure.”

For the four Duncan lakes, there are multiple layers, or pools, to the lake. The topmost pool, called the municipal pool, is considered the normal pool. The municipal pool is for use by the city, he said.

“Above that is the flood pool,” Vaughn said.

Each lake’s municipal pool is measured by its elevation, which is different for each lake.

For certain lakes, however, there is an extra pool for irrigation because those lakes provide water for the surrounding agriculture, Vaughn said.

Duncan hasn’t had many instances where the lakes were in the flood pool stage. The second half of 2007 was one of the times when lakes were above normal levels, he said.

But the lakes returned to normal levels quickly because of the flood protections around the lakes, which is something that Oklahoma is known for, Vaughn said.

Duncan’s lakes are manmade and somewhat recent. Duncan Lake was built in the 1930s, Clear Creek Lake was built in the 1940s, Lake Humphreys was built in the 1950s and Lake Fuqua was built in the 1960s, Vaughn said.

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