Since pipelines are buried underground, pipeline companies use line markers like those shown to the right. The markers indicate the approximate location of the pipeline. Markers are placed where pipelines intersect streets, railroads, rivers and heavily congested areas.
In answer to your question James, I was on Tamsulosin for several years and suffered no serious side effects other than a reduction in ejaculate, a slight lowering of BP and pinpoint pupils.
If you stop taking tamsulosin for any reason, call your doctor before you start taking it again. You may need a dose adjustment. Your blood pressure and prostate will need to be checked often. Visit your doctor regularly. Some things can cause your blood pressure to get too low.