Supt Payne added the River Derwent was not expected to reach the same heights as it did in November.
"We are doing all we can to monitor the shaft water levels to understand if or when any spill might occur into the Carnon River, " he added.
BBC: Concern contaminated Wheal Jane water may pollute river
Trees and grass are being planted along both banks, and a floating garden made up of five islands will be added to the river.
"This could cause a flood that could generate a mudflow down the flanks of the volcano, into the North Fork Toutle River, " Dr Major added.
"We would take advice and maybe site this up river somewhere, " Mr Knight added.
"Once we get that in hand, we'll get a better estimate of when the river will be reopened, "he added.
Mrs Spear, who has lived in Braunton for 45 years, added that there was a river running through the centre of the town.
Local residents and livestock were not at risk as the river was not used for drinking water, officials added.
"Light, sound and human presence will force otters, that would otherwise move up and down the river, on to the road, " he added.
Carr added that several hundred power customers in Greenville, near the Mississippi River, were in the dark.
The coroner added that she had taken on board the concerns about the safety of the river bank in flood conditions, especially since children used the footpaths.
They added the firm's "no-expense-spared clean up" of the River Lark demonstrated its ongoing commitment to the local environment.
The Duckmill Weir White Water Arena on the River Great Ouse in Bedford opened in May 2012 after permanent slalom uprights, lines and gates were added to the Duck Mill weir.
"This will help to make sure people can continue to enjoy the river ready for the start of this year's spring and summer boating season, " Mr Watts added.
Hudson River "submitted proof that several of the guides who were convicted received their license shortly afterwards, " the judge added.
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