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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 ?
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.
He cited one of the adverse impacts of large dams is the destruction of forests as dams tend to accumulate a huge volume of water with the construction of the vertical structure to prevent the natural flow of water through rivers.
There is also a study wherein large dams can induce earthquake,' Bautista added.
Hundreds of thousands of people live downstream of the dams in Lane County, but none of the dams hold back as much water as Oroville Dam.
Major earthquakes around the world in the past decade and increasing interest in the Cascadia subduction zone also contribute to corps engineers wanting to know more about their dams.
Dams are an important part of the infrastructure that enables our modern lifestyle.
He manages the technical program that regulates the safety of more than 5,500 dams in New York State, ranging from large concrete structures to smaller earthen dams.
Use of rubber dam is one of the most widely advocated techniques and yet equally ignored by dental practitioners.
The questions were designed to assess the prevalence of routine use of rubber dam, the attitude of the dentist towards its use and the barriers felt by the dentists that hinder its routine usage.
The research has been conducted by considering three different dams, Tarbela in Pakistan, Aswan in Egypt and Three Gorges Dam in China and the comparative analysis of before and after construction scenario of the dams has been made.
The comparative analysis of three dams shows that when Aswan dam and Tarbela dam were constructed, the focus towards sustainable development was not the main objective.
Dam break includes any type of partial or general damages in dam body which leads in occasional outlet of uncontrollable water volume in river.
Earlier in July the Belo Monte Dam construction was halted by the Brazilian court, until local indigenous community is properly consulted about possible fallout.
river basins, dams produced hydropower, irrigation, flood control, and