The GSB nest box and residents seem all OK this morning. Looks like the river level is rising. Local weather where I live way south of here is predicting significant flooding on the upper Mississippi. Would that likely close the highway that runs at the bottom of the bluffs? And probably the railroad also.
Yes it is. This may be one of the highest again.
Closeup of cliff holes where some kind of swallow nests. Couldn't find a pic from last spring, but maybe "brown cliff swallow" or similar name. All these high dwellers will be safe from flooding, thankfully.