There is a Morgan Lake, located in Union County, Oregon, but it does not have a named boat ramp associated with it. Therefore, it is not possible to accurately answer the questions posed in the prompt.
| MEACHAM CREEK AT GIBBON | 590cfs |
| MINAM RIVER NEAR MINAM | 501cfs |
| UMATILLA RIVER ABOVE MEACHAM CREEK | 362cfs |
| UMATILLA R AT W RESERVATION BNDY NR PENDLETON | 685cfs |
| MILL CREEK NEAR WALLA WALLA | 149cfs |
| MILL CREEK AT WALLA WALLA | 185cfs |