Soon after starting work at National Power Rodding Corp. (now part of Carylon Corporation) in 1960, I developed the first TV camera to inspect sewers. Until that time, the industry’s only way of visual sewer inspection was to take 35 mm photos, endure the lengthy process of getting them developed, and view the pictures which provided only a dim, inadequate view of the inside of the sewer. So, using cameras inside sewers was a major innovation that revolutionized the industry.

Once we were able to see the interior of the sewer lines, we realized there were other services that could improve infrastructure repair. In 1962, I were asked to assist in finding a way to stop infiltration of groundwater into sewer lines, so I developed a grouting packer to pump acrylamide grout through the joint and into the surrounding soil, which stopped the infiltration problems. The grouting method enabled sewer contractors to seal joints and manholes, as well as service connections, up to an unheard of length of 38 feet. This was another unprecedented advance for the sewer industry nationwide. 

Our continued investigation and experimentation helped create smaller, improved cameras with vastly improved capabilities, including the ability to pan and tilt around the sewer line, and zoom in on problem areas. I also helped introduce an improved crawler, using better tracks, which moved the camera through the sewer line smoothly. 

To streamline operations, I installed a computer inside each inspection truck that let the camera operator view footage from inside the sewer line, enter the findings into the computer and print the results for the customer. 

Technology has come a long way in my 54 years in the industry. The industry has continually challenged me to develop tools to improve the services we perform. The advent of sewer linings, and the vast changes in electronics are, in my view, among the newest areas offering opportunities for growth and service improvements.

I see a great future for the sewer industry. Repair and maintenance of the nation’s infrastructure will always be needed. Creating ways to offer cost-effective, innovative repairs will always be the key to a company’s success. 

It’s difficult to retire from a vibrant industry such as ours, because I always see exciting new possibilities ahead, even after all these years.

Harold Kosova retired earlier this year from National Power Rodding after 54 years of service. He was the first man to put a camera into a sewer in 1960 and chemically grouted the first sewer joint in 1962.