The 'River Watch' numbers explainedThe online Hudson Star-Observer is now providing daily updates on the level of the St. Croix River, as measured by the National Oceanic and Atmospheric Administration at Stillwater, Minn.
By: Hudson Star Observer, The Republican Eagle
The levels are given in feet about sea level, leaving off the hundreds digit. Thus, the reported level of 81.81 feet on Thursday, March 24, is actually 681.81 feet above mean (average) sea level.
All of Hudson’s historic data on river levels is based upon measurements taken at Stillwater.
For some perspective, the average level of the river at Hudson is 675 feet above sea level.
The top of the lower seawall in Lakefront Park is at 680 feet. The top of the second seawall is at 684 feet; the intersection of First and Buckeye streets, 687 feet; the top of the Lake Mallalieu dam gates, 688.3 feet; the floor of the Lakefront Park bathhouse, 690 feet; and the surface of the dike road, 691 feet.