Creating Bar Chart with Multiple Lines in R Studio

I have created the following line graph, showing suspended solids concentrations of six sample locations over time.

However, as many of the points in the time series are near the 0 mg/L range, the plots are overlapping each other. I was thinking that I could represent the data using a bar chart, sort of like the image below:

For each date, I would then have a cluster of bars including a bar for each of my six sample locations. Does anyone have any advice on how to code this?

TIA