Saylorville’s Crest Expected to Edge Towards Capacity

JOHNSTON, Iowa – Severe weather and heavy downpours have put Saylorville Reservoir officials on alert.

The reservoir’s crest is forecast to come perilously close to reaching capacity.

The water level is currently 868 feet but with more rain in the forecast over the next 24 hours, the US Army Corps of Engineers predict the reservoir will crest at 883.11 feet on July 7.

If it reaches just 11 inches higher at 884 feet, officials will open the crest gates. That gives them an extra six feet to work with before the water surpasses the emergency spillway at 890 feet.

The current inflow of water is nearly 5,000 cubic feet per second higher than the outflow at 19,900 cubic feet per second. The outflow is set to increase to 19-20,000 cubic feet per second by July 4 or 5 if the reservoir crests above 875 feet as is expected.

That could cause some flooding along the Des Moines River.

If more rain falls than forecast, the situation could become worse.

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