The parliamentary bill permitting its construction was passed in 1791 empowering the company to raise £180,000 (equivalent to £ in ), through 1,800 shares at a cost of £100 each. It also allowed them to raise a further £70,000, if needed, amongst themselves or by the mortgage of tolls and rates. The Act also permitted the company to allow landowners on the line to build wharfs and wharfhouse, and if they refuse to, the company are allowed to if needed. A further Act of Parliament authorised the raising of £149,929 amongst themselves or through the creation of new shares. However, the company were unable to raise the full amount of money authorised by the second Act, and so another was passed allowing them to raise £49,680. Another Act was passed to obtain more money in 1808. This Act empowered the company to raise £168,000 through the creation of 4,200 shares at £40 each. A final Act was passed in 1815 after the company had purchased land for reservoirs, which was not permitted in the previous Acts. The Act permitted the company to sell the land and to pay a debt of £29,096 (equivalent to £ in ), to the treasurers by 29 September 1815 as well, otherwise it would be taken out of the proceeds raised from selling the land.
