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I've got a project that requires installing about 160-ft of 3/4" gas line across a heavy vehicle maintenance yard (thick section 8" PCC, #4 12" OCEW). The gas line will be a 2-ft bury, and I am considering the minimum width of trench for saw cutting and replacement of the paving. Many details...

I've been trying to understand the Modified Rational Method for pond sizing. One thing that is confusing me is calculating the outflow volume. In particular, the calculation calls for 1/2 of the inflow duration x control release discharge x 60 s/min. Does anyone understand why one half is...

Has anyone come across a case where a new force main is tied into an existing force main? I've got a development situation where a residential lift station feeds a 6" force main, which then passes across the frontage of a subject property. It would be convenient to tie into the existing force...

I have a small site with a single story building(7,000 sf) that will have a fire sprinkler system. It will be supplied by a 6-inch fire line off the public 8-inch main about 150-ft distant. The local water authority is saying I may also connect a private fire hydrant off this 6-inch fire line...

I've got a project where the outflow storm line (24") is draining a 2 acre commercial site. The contractors uncovered an existing water main that is conflict with the storm drain. The City will not allow this waterline to be adjusted around the storm pipe. Unfortunately there is not another...