| Clue | Source | Date |
|---|---|---|
| A problem for the banks in the spring to keep nothing back | Irish Times Crosaire | 09 Dec 2019 |
| Pool maintenance concern | LA Times Daily | 30 Nov 2019 |
| Pool maintenance concern | The Washington Post | 30 Nov 2019 |
| What rises and falls in a lake | ||
| What rises and falls in a lake | New York Times | 20 Nov 2019 |
| It might tax a levee | ||
| Critical lake measurement |