If corrosion and infiltration issues are affecting your wastewater system, you have likely spent many hours combing through budgets and researching options. Fortunately, advancements in spray-applied polyurea lining systems mean that there are effective and affordable options for even the most daunting sewer repair projects.
OBIC sewer lining repair systems are proven effective and have a faster return on investment than other options on the market. To illustrate the benefits of OBIC, we compiled an example of the impact one manhole rehabilitation can have on a small to medium-sized municipality.
OBIC manhole rehab case study
A municipality has one leaking manhole with groundwater infiltration. The manhole is 9’ deep and is leaking 2 gallons of groundwater per minute. Although that may not seem like a lot, the impact quickly multiplies.
2 gallons/minute x 1,440 minutes/day x 365 days/year = 1,051,200 gallons per year
The average cost to treat 1,000 gallons of wastewater is $1.75. With groundwater leaking into the wastewater system, that is a lot of money going down the drain.
1,051,200 gallons/year ÷ 1,000 x $1.75 = $1,839.60
If the municipality were to leave the leaking manhole unaddressed, they would spend approximately $1,839.60 treating groundwater unnecessarily. As the leak continues to worsen, that number will continue to climb. This also increases the risk of a sanitary sewer overflow.
The average cost for manhole rehabilitation using the OBIC Armor manhole lining system is $2,250. In less than 1 year and 3 months, the OBIC Armor manhole lining will have paid for itself and continued to save the municipality the cost of treating the groundwater.
$2,250 ÷ $1,839.60 = approximately 1.2
Since it is unlikely that only one manhole in the system is experiencing groundwater infiltration, OBIC recommends that small to medium-sized municipal system owners select 10 manhole rehabilitation projects to complete in a year. Each manhole chosen should have a 2 gallon per minute leak or more. Those 10 manholes are then repaired with OBIC the Armor manhole lining system at an approximate cost of $22,500. This reduces the amount of groundwater being treated by over 10.5 million gallons per year and results in a return on investment in approximately 15 months.
Benefits beyond dollars and cents
Overburdened water and wastewater systems have a direct impact on the budget, but they also have an unintended impact on growth opportunities. If, for example, a community wants to build a new home development the wastewater treatment plant must be able to accommodate that growth. A treatment plant that is overburdened by 10 manholes leaking 10.5 million gallons of groundwater is already falling behind. Without corrective action or a 10-million-dollar expansion, that housing development will not be possible.
How does manhole rehabilitation help solve this problem? Taking a look at the math once again, the average four-person home in America uses an average of 350 gallons of water per day.
350 gallons x 365 days = 127,750 gallons /year
Rehabilitating 10 manholes with OBIC Armor manhole lining will eliminate enough groundwater to allow 82 new homes to be connected to the system.
10.5 million gallons ÷ 127,750 = 82 homes
To learn more about how OBIC manhole lining systems, visit our website and request an on-site demonstration at www.obicproducts.com/contact-us/.