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water under the bridge

A prior issue that is now resolved or considered resolved. That argument we had is just water under the bridge now—don't even worry about it.
See also: bridge, water

(as) busy as a beaver (building a new dam)

Very busy, assiduous, or hardworking. The phrase refers to beavers' reputation for being extremely industrious. Between working two part-time jobs, volunteering on the weekends, and looking after his little brother, Sam's been busy as a beaver this summer. I've been as busy as a beaver building a new dam this year. I've had almost no free time!
See also: beaver, busy, new

dam up

To block something from flowing freely, typically water in a stream, river, etc. A noun or pronoun can be used between "dam" and "up." If we don't dam up the river, this rain will cause a flood.
See also: dam, up

dam something up

to erect a barrier in a river, stream, brook, etc. We are going to have to dam this stream up to make a pond for the cattle. Let's dam up this stream. Why is this river dammed up?
See also: dam, up

water over the dam

 and water under the bridge
Fig. past and unchangeable events. Your quarrel with Lena is water over the dam; now you ought to concentrate on getting along with her. George and I were friends once, but that's all water under the bridge now.
See also: dam, over, water

water over the dam

Also, water under the bridge. Something that is over and done with, especially an unfortunate occurrence. For example, Last year's problems with delivery are water over the dam, or Never mind that old quarrel; that's water under the bridge. These metaphoric phrases allude to water that has flowed over a spillway or under a bridge and thus is gone forever. The first term was first recorded in 1797; the variant dates from the late 1800s.
See also: dam, over, water

water under the bridge

BRITISH, AMERICAN or

water over the dam

AMERICAN
If you say that a bad experience is water under the bridge, you mean that it happened a long time ago and so you do not feel upset or worried about it now. He didn't treat me very well at the time but it's all water under the bridge now. Mr Bruce said that he was relieved it was over and that he regarded his time in jail as water under the bridge. Note: You can also say things such as a lot of water has gone under the bridge to mean that a lot of time has passed or a lot of things have happened since a bad experience. It's almost two years since it happened and a lot of water has gone under the bridge. We're now on speaking terms with Marcia.
See also: bridge, water

water under the bridge

used to refer to events or situations in the past that are no longer to be regarded as important or a source of concern.
The related expression there's been a lot of water under the bridge since — is used to indicate that a lot of time has passed and a great many events have occurred since a particular event. A North American variant is water over the dam .
See also: bridge, water

water under the bridge

A past occurrence, especially something unfortunate, that cannot be undone or rectified: All that is now just water under the bridge.
See also: bridge, water
References in periodicals archive ?
blasting the dam and leaving the sediments in place to minimize costs.
in its biological opinion (BiOp) that dam removal would benefit the
A senior district administration official told Dawn that construction work on the dam will start after the acquisition of land and that the divisional commissioner will pass the notification in this regard soon.
The villages of Bhun, Launa and Bhaoni will be submerged in the dam.
AS the construction of large dams has been debated in many parts of the world, the issue of constructing large dams in the Philippines also triggered howls of protest.
Critics also assailed government for failing to identify the positive and negative effects of the large dams or undertaking a cost-benefit analysis to back such undertaking.
At 770 feet tall, Oroville Dam is the tallest dam in the United States, according to the California Department of Water Resources.
Only one small dam failed in Japan and none in Chile, said Silas Sanderson, corps team leader for the drilling research of Cougar Dam.
When development occurs downstream of a dam, it can cause the dam's hazard potential to increase, raising the safety requirements for the dam and the regulatory obligations of the owner.
Use of rubber dam is one of the most widely advocated techniques and yet equally ignored by dental practitioners.
Considering the environmental impacts, at the time of constructing of Tarbela dam the environmental impacts were not given much of importance, hence there was a lack of data.
Ice Dam Liquidators is a Minneapolis ice dam removal company that provides ice dam solutions, ice dam repair, and ice dam prevention for commercial and residential properties.
Area of the river water shed to construction area of Eyvashan dam in Lorestan is about 120 sq.
The number of dams established until 1433 AH (2012) reached 394 dams at a cost of (5,491, 808,377 billion Saudi riyals) and a water storage capacity of approximately (1,926,898,524 billion cubic liters).
The Mokihinui River, one of New Zealand's largest and most pristine wild rivers, will continue to flow freely after Meridian Energy announced its decision not to move forward with the planned Mokihinui Dam.