Attending WEFTEC 2015?

July 13, 2015—Paul Costa, RJN’s Vice-President and Chair of the WEFTEC Collection Systems Sub-Committee welcomes everyone attending WEFTEC in Chicago to join him at the 13th Annual Collections Systems Luncheon.  The luncheon will be held on Tuesday, September 29, 2015 from noon to 1:30 pm and features Phil Hubbard, P.E., of the Hampton Roads Sanitation District. Don’t miss out on this opportunity to learn from and network with fellow collection systems professionals.  Register early to guarantee a spot:

 … Read the rest

Can Conserving Water on Rainy Days Prevent Sewer Overflows? Part 2 of 2

June 26, 2015—In Part 1, Vincent Bergl, P.E., discussed whether or not conserving water on rainy days could help prevent overflows in separated sewer systems. Here he explores combined sewer systems, which were primarily constructed in the early twentieth century when the goal was to convey both untreated sewage and stormwater to the nearest river or stream as quickly and cheaply as possible.

OVRFLW005_lowBy design, combined sewers are significantly larger than sanitary sewers, so in a well-functioning combined sewer system, pipeline capacity is rarely the primary constraint. Rather, it’s the capacity of downstream treatment facilities that’s easily exhausted. Most urban treatment plants were built prior to the Clean Water Act.… Read the rest

Can conserving water on rainy days prevent sewer overflows? Part 1 of 2


June 12, 2015—Project Engineer Vincent Bergl, P.E. recently caught up with an old college friend who mentioned she was refraining from using water during heavy rains so that she wouldn’t contribute to overloading the sewer system. It sparked an impromptu lesson on urban hydrology (lucky her), and after hearing similar concerns expressed elsewhere, Vinnie decided his thoughts were worth sharing:

No one welcomes beach closings or basement backups, but can water conservation during storms prevent sewer overflows? The answer is maybe sometimes, but not really, depending on context. Let me explain.

SEPARATED VS. COMBINED SEWERS. Let’s start by distinguishing separated from combined sewer systems because the difference affects the answer.… Read the rest

RJN Group to Present at Texas Water 2015

Joseph Cotton, PE, ENV SP, of RJN Group, Inc. (RJN), will co-host a technical breakout session at the upcoming Texas Water 2015 on Friday, April 17 at 9:30 am. In this session, “How to Clean and TV Siphons at One of the Busiest Intersections in Texas During Construction Season”, Mr. Cotton and his co-presenters, Jerome Iltis, PE, and Dennis Laskowski, PE, both of San Antonio Water System (SAWS), will highlight their applicable experiences, challenges, and successes with work conducted in February through April, 2014.

San Antonio’s River Walk and Downtown are premier tourist attractions. People from across the nation and the world go to San Antonio to visit the sites that make San Antonio a vacation hot spot.… Read the rest