| Year | Annual volume | Construction and maintenance cost | Discount rate 5% | Annual benefits ($) | Discount rate 5% |
| 0 | 0 | 3,825,000 | 3,825,000 | 0 | 0 | 1 | 0 | 3,825,000 | 3,642,857 | 0 | 0 | 5 | 5,974,667 | 29,250 | 22,918 | 4,021,243 | 3,150,749 | 10 | 6,926,276 | 29,250 | 17,957 | 4,661,723 | 2,861,894 | 15 | 8,029,452 | 29,250 | 14,070 | 5,404,215 | 2,599,520 | 20 | 9,308,336 | 29,250 | 11,024 | 6,264,966 | 2,361,200 | 22 | 9,875,214 | 29,250 | 9,999 | 6,646,503 | 2,272,106 | | | | 7,825,018 | | 58,224,984 |
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