idea you could save time and just get a staff gauge
various sizes available, coated steel or fiberglass, $35 to $42 per 4 foot section. All you need is a couple of tapcons and hand drill to fasten concrete wingwall. On the other hand, you could buy some white concrete paint and follow the directions for surface prep. For posterity, it would be helpful to get a measurement from the top of wall to a point on your gauge, in case the gauge ever washes away, then the next one can read the same elevations.


https://www.benmeadows.com/ben-meadows-fiberglass-stream-and-staff-gauges_36816387/?gclid=EAIaIQobChMIkNyntfym2wIVjCaGCh1fIgrUEAQYAiABEgJ9S_D_BwE&selectedsku=125123&CID=BMPL10&s_kwcid=AL!3210!3!181721379273!!!g!130343842138!&ef_id=WtY7vgAAAFaKQxAl:20180527224835:s
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