Combined releases increase at Pipestem, Jamestown reservoirs
As of Wednesday, April 27, Jamestown Reservoir was 4 feet into the flood storage at 1,435 feet above mean sea level.
JAMESTOWN – Combined releases at Pipestem and Jamestown reservoirs have increased from 215 cubic feet per second to 450 cfs, according to Bob Martin, interim Pipestem Dam manager for the U.S. Army Corps of Engineers.
He said the releases were increased Tuesday and Wednesday, April 26-27.
Water releases at Jamestown Reservoir increased from 200 cfs last week to 400 cfs. Pipestem Reservoir releases are at 50 cfs.
As of Wednesday, Jamestown Reservoir was 4 feet into the flood storage at 1,435 feet above mean sea level.
The water level at Pipestem Reservoir has risen 19 vertical feet since the snowmelt began and was at 1,460 feet AMSL. Pipestem Reservoir’s conservation pool is at 1,442.5 feet AMSL. During the winter, the water level at Pipestem dropped to 1,441 feet AMSL.
The highest the water level has ever been at Pipestem was 1,492 feet AMSL in 2009. The water level at Jamestown Reservoir was 1,454 feet AMSL in 2009.
Martin said there are no concerns for flooding at this point.
“We haven’t even increased our dam safety surveillance yet,” he said. “We are well within what we’ve seen in the past.”
Martin said the Corps of Engineers will increase its dam safety surveillance at Pipestem if water levels reach 1,470 feet AMSL.
He said the Corps of Engineers at Lake Ashtabula near Valley City was near New Rockford, North Dakota, which is by the James River and just on the edge of Pipestem, and Martin was told the fields are mostly free of snow and a lot of moisture soaked into the ground.
“In the upper watershed, the inflows should be really tapering off soon,” he said. “Of course, it all depends on what we get this weekend.”
The Jamestown area could get more precipitation later this week, according to the National Weather Service forecast. Martin said any decisions to increase water releases at Jamestown and Pipestem reservoirs will depend on how much rainfall the area gets.
“It was encouraging that there wasn’t a lot of unusual runoff in the upper watersheds yesterday,” he said.