The Prothonotary shall, under the supervision and direction of the county government, prepare a docket to be known as “The Sussex County Sewer and Water Lien Docket” in which shall be recorded the liens for service charges. The Docket shall be prepared at the expense of the county government in substantially the same form as the judgment docket for Sussex County, and contain in the back thereof an index according to the name of the owner against which such lien has been assessed. No sewer lien shall be valid unless duly recorded as provided in this section. All sewer liens duly recorded in the Docket shall continue in full force and effect until the liens have been satisfied by payment, and when such liens are satisfied by payment the Prothonotary, acting under the supervision and direction of the county government, shall satisfy the record by entering thereon the date of final payment and the words “satisfied in full.” The Prothonotary, for the use of the county government, shall receive a fee of 50 cents for each satisfaction so entered.