120+ Dam Riddles with Answers
This collection of 121 dam riddles mixes a running "dam" pun with the real vocabulary of reservoirs, spillways, turbines, and water pressure. The answer that dominates is, naturally, a dam, but the pool branches into arch, gravity, embankment, and beaver dams, plus the machinery and engineering around them. Expect clues about holding water back, going with the flow, and turning falling water into electricity. When this deck runs dry, the Earthquake riddles pick up right where these leave off.
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Three Dam riddles, answers included
- I stop a river without asking it to quit, then make a lake out of the argument. What am I?
- Answer: a dam
- What wall gets stronger when the thing pushing against it gets deeper?
- Answer: a dam
- What holds gallons back without owning a single bucket?
- Answer: a dam
Dam Riddles
- I stop a river without asking it to quit, then make a lake out of the argument. What am I?a dam
- What wall gets stronger when the thing pushing against it gets deeper?a dam
- What holds gallons back without owning a single bucket?a dam
- I am a lake with a human decision hidden underneath me. What am I?a reservoir
- What river barrier can sound like a mild curse without saying one?a dam
- I am the safe way for a lake to go over the top without going rogue. What am I?a spillway
- What gate can make a downstream river bigger by opening?a sluice gate
- I drink falling water, spin in place, and send power away. What am I?a turbine
- What kind of wall turns a river's push sideways into the canyon?an arch dam
- What builder hears running water and takes it as a work order?a beaver
- I leak by design, yet my builder would not call me broken. What am I?a beaver dam
- What structure can make electricity while doing absolutely no traveling?a hydroelectric dam
- What has a wet side, a dry side, and no towel?a dam
- I am poured like a sidewalk but measured like a mountain. What am I?a concrete dam
- Why might engineers divide one giant pour into blocks instead of making it whole?to control concrete heat
- I can disappear underwater for years, then drought puts my steeple back on the skyline. What am I?a drowned village
- What part of a submerged town may become a drought gauge without having numbers?a church tower
- What gets the biggest shove while sitting at the bottom of a quiet lake?the base of a dam
- I am invisible, increase with depth, and make engineers thicken walls below. What am I?water pressure
- What part of a dam carries the greatest burden while getting the least view?the foundation
- What wall makes a lake by refusing to go with the flow?a dam
- What controlled event looks like the barrier surrendering but is actually it doing its job?a water release
- What gets opened when holding back more water would be the risky choice?a floodgate
- I am a temporary dry room built where water insists the room should be wet. What am I?a cofferdam
- What barrier may be built so builders can build another barrier?a cofferdam
- What construction project begins by arguing with a river about where it may flow?dam construction
- I am the parent called 'mother' in a pedigree, but my name also blocks rivers. What am I?a dam
- In animal breeding, what four-letter word faces 'sire' across the family tree?dam
- What can be a mother without ever changing a diaper?a dam
- I hold back water literally and feelings figuratively. What am I?a dam
- What can break in a valley or in a metaphor after someone holds too much inside?a dam
- What river wall has a name that sounds naughtier than it is?a dam
- What power source needs water to drop before the voltage can rise?hydroelectric power
- I am potential while high, motion while falling, and electricity after a turbine meets me. What am I?stored water energy
- What does a dam borrow from gravity and repay as electricity?energy from falling water
- What lake can double as a giant rechargeable battery without containing one?a pumped-storage reservoir
- I climb uphill when electricity is plentiful so I can fall for profit later. What am I?pumped-storage water
- What hydro system spends electricity lifting water, then earns some back by dropping it?pumped-storage hydropower
- What battery gets wetter when you charge it?a pumped-storage plant
- I curve upstream, but the water pushing me helps send its force into rock. What am I?an arch dam
- Which dam shape treats canyon walls like teammates?an arch
- What concrete giant gives the canyon walls part of its homework?an arch dam
- I resist water mostly by being enormously heavy. What am I?a gravity dam
- Which dam wins its argument with water mostly by refusing to be moved?a gravity dam
- What heavyweight never enters the ring but still fights pressure?a gravity dam
- I look more like a broad hill than a concrete wall, yet a river stops at me. What am I?an embankment dam
- What dam may hide its strength under layers of earth and rock instead of concrete?an embankment dam
- What artificial hill can have a lake leaning against it?an embankment dam
- I am a dam's secret waterproof heart, buried where visitors cannot admire me. What am I?an impervious core
- What hidden layer can matter more than the rocks everyone sees?a clay core
- What part of an earth dam has one job: persuade water not to sneak through?a cutoff wall
- I live inside concrete, carry no passengers, and let inspectors visit the dam's interior. What am I?an inspection gallery
- What giant wall can contain a corridor without being a building?a dam
- I measure tiny movements in a structure whose job is to look perfectly still. What am I?a dam monitoring instrument
- What does an engineer watch precisely because a giant concrete wall appears not to move?dam deformation
- What motion is tiny when everything is going well and terrifying when it is not?structural movement
- I am a narrow warning that water may turn into a much wider problem. What am I?a dam crack
- What small line in concrete can produce a very large meeting?a crack
- What tiny opening can make an engineer's schedule suddenly overflow?a leak
- I pass through a barrier in small amounts, so drains and instruments keep an eye on me. What am I?seepage
- What water is downstream before anyone deliberately releases it?seepage water
- What leak can be normal in small doses but suspicious when it suddenly grows?dam seepage
- I am the point where a reservoir becomes taller than the barrier meant to contain it. What am I?overtopping
- What is a dam's least favorite shortcut for water?over the crest
- I sit at the very top of the barrier, where one more rise in water becomes serious. What am I?the crest
- I am a deliberate opening that can make a reservoir shrink and a river swell. What am I?an outlet works
- What passage lets stored water leave from below instead of climbing over the top?a low-level outlet
- What underground exit keeps a lake from needing the roof?an outlet tunnel
- I swallow water near the lake and deliver it to machinery that prefers a powerful drink. What am I?a penstock
- I hum beside stored water, but my product leaves through wires, not pipes. What am I?a powerhouse
- I spin because water falls, but I make electrons do the traveling. What am I?a hydroelectric generator
- What follows a turbine in the chain from falling water to a glowing lamp?a generator
- I am the vertical difference that makes stored water valuable to a turbine. What am I?hydraulic head
- I arrive upstream as mud in motion, then a quiet lake convinces me to stay. What am I?sediment
- What unwanted savings account grows grain by grain behind a dam?sediment buildup
- I used to hurry downstream, but a new lake slowed me until I sank. What am I?trapped silt
- What can make a reservoir smaller without lowering its shoreline overnight?sedimentation
- What fills a lake from the bottom while the river keeps arriving from the top?silt
- I am built from sticks and mud, yet my imperfections help create wetlands. What am I?a beaver dam
- What barrier works partly because it does not try to be perfectly watertight?a beaver dam
- What leaky construction can be excellent engineering if your contractor has a flat tail?a beaver dam
- I begin as a stream problem for a beaver and end as new real estate for frogs. What am I?a beaver pond
- What ecosystem can appear because one furry engineer dislikes the sound of running water?a wetland
- What construction crew can turn running water into duck habitat without a permit office?a beaver colony
- I am a river before the wall and a lake after it, though I never changed my water. What am I?impounded water
- What does a river gain when a barrier makes it wait?storage
- What can turn miles of river into one very long waiting room?a dam
- I may take years to become full, even though nobody forgot to turn on the faucet. What am I?a new reservoir
- What enormous container can take several rainy seasons to finish filling?a dam reservoir
- What lake can have an opening day years before it is full?a filling reservoir
- I am concrete that once generated so much heat that engineers had to treat cooling as part of construction. What am I?mass concrete
- Why can making one enormous concrete block be worse than making many smaller ones?heat from curing concrete
- What giant pour can crack because its chemistry makes it too warm?mass concrete curing
- I carry cold water through young concrete, not to supply a faucet but to remove heat. What am I?cooling pipes
- What plumbing can be buried in a dam even though nobody plans to wash dishes there?embedded cooling pipes
- What pipes help a concrete giant chill out before doing its lifelong job?concrete cooling tubes
- I stand downstream and turn a violent jet into a much less dramatic river. What am I?a stilling basin
- I am a rolling wall of water nobody wants to see downstream of a failed barrier. What am I?a dam-break flood wave
- What turns stored water from an asset into an emergency in moments?a dam breach
- What is the one opening a dam never wants to make by accident?a breach
- I am an old Dutch tale's tiny solution to a huge leak, but I belong to fiction, not engineering manuals. What am I?the finger-in-the-dike story
- What famous Dutch rescue involves a finger, a leak, and more literature than history?the boy at the dike
- What emergency repair is famous enough for children but too fictional for an engineer?a finger plugging a dike
- I hold back a lake, but I am made of packed earth instead of concrete. What am I?an earthfill dam
- I am a wall of loose rock with a watertight heart. What am I?a rockfill dam
- When the lake gets too high, I rise to warn the people nearby. What am I?a reservoir alarm
- What giant wall has a side that faces the lake and gets wet without complaining?the upstream face
- What side of the giant wall looks away from the lake and toward the river below?the downstream face
- I am a road across the top, but cars are not always invited. What am I?a crest roadway
- What lake is made on purpose when a river is blocked?an artificial lake
- I am the river before it reaches the big barrier. Which direction am I?upstream
- I am where the river continues after passing the big barrier. Which direction am I?downstream
- What turns inside a power station when rushing water gives it a spin?a runner
- I carry electricity away after moving water helps make it. What am I?a transmission line
- Water goes in, electricity comes out, and I never need a battery charger.a hydroelectric power station
- What opening can be used to let fish travel past a river barrier without buying a ticket?a fish ladder
- I measure how high the lake surface is, but I never use a ruler. What am I?a water level gauge
- I am the muddy river bottom that slowly piles up behind a barrier. What am I?a sediment deposit
- What do engineers call the river's flow when they measure how much water passes each second?discharge
- I am a huge wall built across a narrow valley, and the hills on both sides help hold me in place. What am I?a valley barrier
- I am the land beside the stored lake, sometimes sandy, sometimes rocky, and always at the water's edge.a reservoir shoreline
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How to Solve These Dam Riddles
These riddles repeatedly play on what a dam does: it holds something back. Sometimes that means literal water, as in "What wall makes a lake by refusing to go with the flow?" Other clues turn the same idea figurative, asking what can break after someone holds too much inside. A second wordplay thread uses "dam" as the breeding term for a mother, paired with "sire" rather than a river.
When the answer is not simply a dam, the clue usually points to its engineering vocabulary. Water safely crossing the barrier suggests a spillway, an opening that controls flow suggests a floodgate or sluice gate, and falling water that produces power leads toward turbines, generators, hydraulic head, and hydroelectric power. Shape also matters: arch dams recruit canyon walls, while gravity dams rely mainly on their enormous weight.
Where These Dam Riddles Fit
This page works well for a classroom unit on rivers, renewable energy, civil engineering, or ecosystems because the jokes keep returning to real terms such as reservoir, sediment, seepage, spillway, and turbine. A teacher can use the shorter clues as quick warmups, then unpack why an arch dam transfers force into canyon walls or why pressure is greatest near the base.
For family trivia, road trips, or a science club, start with the beaver and basic barrier clues before moving into cofferdams, impervious cores, hydraulic head, and pumped storage. The more accessible material suits Kids, while technical clues about concrete curing, structural movement, and outlet works can form a Hard round. The recurring "dam" double meaning also gives a host an easy running joke between questions.
More Dam Riddles by Type
Dam Riddles for Kids
35 kid-friendly dam riddles with simple words, safe themes, and answers that make young solvers feel clever.
Example Dam Riddles for Kids
- I stop a river without asking it to quit, then make a lake out of the argument. What am I? a dam
- What holds gallons back without owning a single bucket? a dam
- I am the safe way for a lake to go over the top without going rogue. What am I? a spillway
- I drink falling water, spin in place, and send power away. What am I? a turbine
Hard Dam Riddles
For solvers who like a fight: 43 hard dam riddles that resist the first guess, and often the second.
Example Hard Dam Riddles
- What kind of wall turns a river's push sideways into the canyon? an arch dam
- Why might engineers divide one giant pour into blocks instead of making it whole? to control concrete heat
- I can disappear underwater for years, then drought puts my steeple back on the skyline. What am I? a drowned village
- What part of a submerged town may become a drought gauge without having numbers? a church tower
Dam Riddles for Adults
44 dam riddles with grown-up wit: subtler wordplay and references, zero crudeness, all challenge.
Example Dam Riddles for Adults
- I am a lake with a human decision hidden underneath me. What am I? a reservoir
- I am poured like a sidewalk but measured like a mountain. What am I? a concrete dam
- What part of a dam carries the greatest burden while getting the least view? the foundation
- What controlled event looks like the barrier surrendering but is actually it doing its job? a water release
Funny Dam Riddles
The punchline crowd: 33 dam riddles built for a laugh, with puns, twists and groan-worthy wordplay included.
Example Funny Dam Riddles
- What river barrier can sound like a mild curse without saying one? a dam
- What builder hears running water and takes it as a work order? a beaver
- What structure can make electricity while doing absolutely no traveling? a hydroelectric dam
- What has a wet side, a dry side, and no towel? a dam
Easy Dam Riddles
Warm up with 31 easy dam riddles for quick wins to build momentum before the tricky ones.
Example Easy Dam Riddles
- What wall makes a lake by refusing to go with the flow? a dam
- What river wall has a name that sounds naughtier than it is? a dam
- What heavyweight never enters the ring but still fights pressure? a gravity dam
- What is a dam's least favorite shortcut for water? over the crest
Tricky Dam Riddles
44 tricky dam riddles that bait the obvious answer, so read slowly, the trap is in the wording.
Example Tricky Dam Riddles
- What wall gets stronger when the thing pushing against it gets deeper? a dam
- What gate can make a downstream river bigger by opening? a sluice gate
- I leak by design, yet my builder would not call me broken. What am I? a beaver dam
- What gets the biggest shove while sitting at the bottom of a quiet lake? the base of a dam
What Am I Dam Riddles
The classic guessing game: 49 what-am-I dam riddles that describe themselves clue by clue. Read, commit to a guess, then reveal.
Example What Am I Dam Riddles
- I am invisible, increase with depth, and make engineers thicken walls below. What am I? water pressure
- I am a temporary dry room built where water insists the room should be wet. What am I? a cofferdam
- I am the parent called 'mother' in a pedigree, but my name also blocks rivers. What am I? a dam
- I hold back water literally and feelings figuratively. What am I? a dam
Clever Dam Riddles
44 dam riddles built on a genuinely neat idea rather than a trap: fair on the first read, satisfying on the reveal.
Example Clever Dam Riddles
- What gets opened when holding back more water would be the risky choice? a floodgate
- In animal breeding, what four-letter word faces 'sire' across the family tree? dam
- What can break in a valley or in a metaphor after someone holds too much inside? a dam
- What power source needs water to drop before the voltage can rise? hydroelectric power
Long Dam Riddles
17 dam riddles with a full setup and room for real misdirection, the ones worth reading out loud.
Example Long Dam Riddles
- I am potential while high, motion while falling, and electricity after a turbine meets me. What am I? stored water energy
- I live inside concrete, carry no passengers, and let inspectors visit the dam's interior. What am I? an inspection gallery
- I pass through a barrier in small amounts, so drains and instruments keep an eye on me. What am I? seepage
- I am the point where a reservoir becomes taller than the barrier meant to contain it. What am I? overtopping
Dam Riddles to Ask Your Friends
35 dam riddles built to stump someone: text one without the answer, watch them squirm, then enjoy the reveal.
Example Dam Riddles to Ask Your Friends
- What barrier may be built so builders can build another barrier? a cofferdam
- What does a dam borrow from gravity and repay as electricity? energy from falling water
- What hydro system spends electricity lifting water, then earns some back by dropping it? pumped-storage hydropower
- What concrete giant gives the canyon walls part of its homework? an arch dam
Short Dam Riddles
In a hurry? 104 bite-size dam riddles that get to the point in one line, perfect to text a friend.
Example Short Dam Riddles
- What construction project begins by arguing with a river about where it may flow? dam construction
- What can be a mother without ever changing a diaper? a dam
- What lake can double as a giant rechargeable battery without containing one? a pumped-storage reservoir
- I climb uphill when electricity is plentiful so I can fall for profit later. What am I? pumped-storage water
All 121 Dam Riddles with Answers
1. I stop a river without asking it to quit, then make a lake out of the argument. What am I?
Answer: a dam
2. What wall gets stronger when the thing pushing against it gets deeper?
Answer: a dam
3. What holds gallons back without owning a single bucket?
Answer: a dam
4. I am a lake with a human decision hidden underneath me. What am I?
Answer: a reservoir
5. What river barrier can sound like a mild curse without saying one?
Answer: a dam
6. I am the safe way for a lake to go over the top without going rogue. What am I?
Answer: a spillway
7. What gate can make a downstream river bigger by opening?
Answer: a sluice gate
8. I drink falling water, spin in place, and send power away. What am I?
Answer: a turbine
9. What kind of wall turns a river's push sideways into the canyon?
Answer: an arch dam
10. What builder hears running water and takes it as a work order?
Answer: a beaver
11. I leak by design, yet my builder would not call me broken. What am I?
Answer: a beaver dam
12. What structure can make electricity while doing absolutely no traveling?
Answer: a hydroelectric dam
13. What has a wet side, a dry side, and no towel?
Answer: a dam
14. I am poured like a sidewalk but measured like a mountain. What am I?
Answer: a concrete dam
15. Why might engineers divide one giant pour into blocks instead of making it whole?
Answer: to control concrete heat
16. I can disappear underwater for years, then drought puts my steeple back on the skyline. What am I?
Answer: a drowned village
17. What part of a submerged town may become a drought gauge without having numbers?
Answer: a church tower
18. What gets the biggest shove while sitting at the bottom of a quiet lake?
Answer: the base of a dam
19. I am invisible, increase with depth, and make engineers thicken walls below. What am I?
Answer: water pressure
20. What part of a dam carries the greatest burden while getting the least view?
Answer: the foundation
21. What wall makes a lake by refusing to go with the flow?
Answer: a dam
22. What controlled event looks like the barrier surrendering but is actually it doing its job?
Answer: a water release
23. What gets opened when holding back more water would be the risky choice?
Answer: a floodgate
24. I am a temporary dry room built where water insists the room should be wet. What am I?
Answer: a cofferdam
25. What barrier may be built so builders can build another barrier?
Answer: a cofferdam
26. What construction project begins by arguing with a river about where it may flow?
Answer: dam construction
27. I am the parent called 'mother' in a pedigree, but my name also blocks rivers. What am I?
Answer: a dam
28. In animal breeding, what four-letter word faces 'sire' across the family tree?
Answer: dam
29. What can be a mother without ever changing a diaper?
Answer: a dam
30. I hold back water literally and feelings figuratively. What am I?
Answer: a dam
31. What can break in a valley or in a metaphor after someone holds too much inside?
Answer: a dam
32. What river wall has a name that sounds naughtier than it is?
Answer: a dam
33. What power source needs water to drop before the voltage can rise?
Answer: hydroelectric power
34. I am potential while high, motion while falling, and electricity after a turbine meets me. What am I?
Answer: stored water energy
35. What does a dam borrow from gravity and repay as electricity?
Answer: energy from falling water
36. What lake can double as a giant rechargeable battery without containing one?
Answer: a pumped-storage reservoir
37. I climb uphill when electricity is plentiful so I can fall for profit later. What am I?
Answer: pumped-storage water
38. What hydro system spends electricity lifting water, then earns some back by dropping it?
Answer: pumped-storage hydropower
39. What battery gets wetter when you charge it?
Answer: a pumped-storage plant
40. I curve upstream, but the water pushing me helps send its force into rock. What am I?
Answer: an arch dam
41. Which dam shape treats canyon walls like teammates?
Answer: an arch
42. What concrete giant gives the canyon walls part of its homework?
Answer: an arch dam
43. I resist water mostly by being enormously heavy. What am I?
Answer: a gravity dam
44. Which dam wins its argument with water mostly by refusing to be moved?
Answer: a gravity dam
45. What heavyweight never enters the ring but still fights pressure?
Answer: a gravity dam
46. I look more like a broad hill than a concrete wall, yet a river stops at me. What am I?
Answer: an embankment dam
47. What dam may hide its strength under layers of earth and rock instead of concrete?
Answer: an embankment dam
48. What artificial hill can have a lake leaning against it?
Answer: an embankment dam
49. I am a dam's secret waterproof heart, buried where visitors cannot admire me. What am I?
Answer: an impervious core
50. What hidden layer can matter more than the rocks everyone sees?
Answer: a clay core
51. What part of an earth dam has one job: persuade water not to sneak through?
Answer: a cutoff wall
52. I live inside concrete, carry no passengers, and let inspectors visit the dam's interior. What am I?
Answer: an inspection gallery
53. What giant wall can contain a corridor without being a building?
Answer: a dam
54. I measure tiny movements in a structure whose job is to look perfectly still. What am I?
Answer: a dam monitoring instrument
55. What does an engineer watch precisely because a giant concrete wall appears not to move?
Answer: dam deformation
56. What motion is tiny when everything is going well and terrifying when it is not?
Answer: structural movement
57. I am a narrow warning that water may turn into a much wider problem. What am I?
Answer: a dam crack
58. What small line in concrete can produce a very large meeting?
Answer: a crack
59. What tiny opening can make an engineer's schedule suddenly overflow?
Answer: a leak
60. I pass through a barrier in small amounts, so drains and instruments keep an eye on me. What am I?
Answer: seepage
61. What water is downstream before anyone deliberately releases it?
Answer: seepage water
62. What leak can be normal in small doses but suspicious when it suddenly grows?
Answer: dam seepage
63. I am the point where a reservoir becomes taller than the barrier meant to contain it. What am I?
Answer: overtopping
64. What is a dam's least favorite shortcut for water?
Answer: over the crest
65. I sit at the very top of the barrier, where one more rise in water becomes serious. What am I?
Answer: the crest
66. I am a deliberate opening that can make a reservoir shrink and a river swell. What am I?
Answer: an outlet works
67. What passage lets stored water leave from below instead of climbing over the top?
Answer: a low-level outlet
68. What underground exit keeps a lake from needing the roof?
Answer: an outlet tunnel
69. I swallow water near the lake and deliver it to machinery that prefers a powerful drink. What am I?
Answer: a penstock
70. I hum beside stored water, but my product leaves through wires, not pipes. What am I?
Answer: a powerhouse
71. I spin because water falls, but I make electrons do the traveling. What am I?
Answer: a hydroelectric generator
72. What follows a turbine in the chain from falling water to a glowing lamp?
Answer: a generator
73. I am the vertical difference that makes stored water valuable to a turbine. What am I?
Answer: hydraulic head
74. I arrive upstream as mud in motion, then a quiet lake convinces me to stay. What am I?
Answer: sediment
75. What unwanted savings account grows grain by grain behind a dam?
Answer: sediment buildup
76. I used to hurry downstream, but a new lake slowed me until I sank. What am I?
Answer: trapped silt
77. What can make a reservoir smaller without lowering its shoreline overnight?
Answer: sedimentation
78. What fills a lake from the bottom while the river keeps arriving from the top?
Answer: silt
79. I am built from sticks and mud, yet my imperfections help create wetlands. What am I?
Answer: a beaver dam
80. What barrier works partly because it does not try to be perfectly watertight?
Answer: a beaver dam
81. What leaky construction can be excellent engineering if your contractor has a flat tail?
Answer: a beaver dam
82. I begin as a stream problem for a beaver and end as new real estate for frogs. What am I?
Answer: a beaver pond
83. What ecosystem can appear because one furry engineer dislikes the sound of running water?
Answer: a wetland
84. What construction crew can turn running water into duck habitat without a permit office?
Answer: a beaver colony
85. I am a river before the wall and a lake after it, though I never changed my water. What am I?
Answer: impounded water
86. What does a river gain when a barrier makes it wait?
Answer: storage
87. What can turn miles of river into one very long waiting room?
Answer: a dam
88. I may take years to become full, even though nobody forgot to turn on the faucet. What am I?
Answer: a new reservoir
89. What enormous container can take several rainy seasons to finish filling?
Answer: a dam reservoir
90. What lake can have an opening day years before it is full?
Answer: a filling reservoir
91. I am concrete that once generated so much heat that engineers had to treat cooling as part of construction. What am I?
Answer: mass concrete
92. Why can making one enormous concrete block be worse than making many smaller ones?
Answer: heat from curing concrete
93. What giant pour can crack because its chemistry makes it too warm?
Answer: mass concrete curing
94. I carry cold water through young concrete, not to supply a faucet but to remove heat. What am I?
Answer: cooling pipes
95. What plumbing can be buried in a dam even though nobody plans to wash dishes there?
Answer: embedded cooling pipes
96. What pipes help a concrete giant chill out before doing its lifelong job?
Answer: concrete cooling tubes
97. I stand downstream and turn a violent jet into a much less dramatic river. What am I?
Answer: a stilling basin
98. I am a rolling wall of water nobody wants to see downstream of a failed barrier. What am I?
Answer: a dam-break flood wave
99. What turns stored water from an asset into an emergency in moments?
Answer: a dam breach
100. What is the one opening a dam never wants to make by accident?
Answer: a breach
101. I am an old Dutch tale's tiny solution to a huge leak, but I belong to fiction, not engineering manuals. What am I?
Answer: the finger-in-the-dike story
102. What famous Dutch rescue involves a finger, a leak, and more literature than history?
Answer: the boy at the dike
103. What emergency repair is famous enough for children but too fictional for an engineer?
Answer: a finger plugging a dike
104. I hold back a lake, but I am made of packed earth instead of concrete. What am I?
Answer: an earthfill dam
105. I am a wall of loose rock with a watertight heart. What am I?
Answer: a rockfill dam
106. When the lake gets too high, I rise to warn the people nearby. What am I?
Answer: a reservoir alarm
107. What giant wall has a side that faces the lake and gets wet without complaining?
Answer: the upstream face
108. What side of the giant wall looks away from the lake and toward the river below?
Answer: the downstream face
109. I am a road across the top, but cars are not always invited. What am I?
Answer: a crest roadway
110. What lake is made on purpose when a river is blocked?
Answer: an artificial lake
111. I am the river before it reaches the big barrier. Which direction am I?
Answer: upstream
112. I am where the river continues after passing the big barrier. Which direction am I?
Answer: downstream
113. What turns inside a power station when rushing water gives it a spin?
Answer: a runner
114. I carry electricity away after moving water helps make it. What am I?
Answer: a transmission line
115. Water goes in, electricity comes out, and I never need a battery charger.
Answer: a hydroelectric power station
116. What opening can be used to let fish travel past a river barrier without buying a ticket?
Answer: a fish ladder
117. I measure how high the lake surface is, but I never use a ruler. What am I?
Answer: a water level gauge
118. I am the muddy river bottom that slowly piles up behind a barrier. What am I?
Answer: a sediment deposit
119. What do engineers call the river's flow when they measure how much water passes each second?
Answer: discharge
120. I am a huge wall built across a narrow valley, and the hills on both sides help hold me in place. What am I?
Answer: a valley barrier
121. I am the land beside the stored lake, sometimes sandy, sometimes rocky, and always at the water's edge.
Answer: a reservoir shoreline
That's all 121, solved, peeked, or saved for later. The generator up top can re-deal them in any order, or filter down to exactly the kind you want.
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