The lock structure composes of a boat chamber of 50 meters length with the bottom width of 17 meters and the top width of 37.74 meters with side slopes of 1:1.5. There are 2 gates (each with 2 half gates) on each side of the chamber. Each half gate has a dimension of 7.25x5.11 meters. 

Both the Damnoen Saduak Canal and Bang Nok Khwaek are located within Damnoen Saduak Operation and Maintenance Project. This irrigation project covers the area southward of the Damnoen Saduak Canal to the salt water protection dike. Total project area is 25,210 hectares while the irrigated area is 20,080 hectares. The project area covers 3 provinces; Ratchaburi, Samut Songkhram, and Samut Sakhon. Bang Nok Khwaek Lock was constructed at the time of rehabilitation of Damnoen Sa Duak Canal in order to provided control of water level in the canal and allowing boats to travel pass the gates. Construction of the lock was completed in 1904 and becomes 119 years old in 2023. The lock is still fully functional with original parts except for small electric motors installed to assist operating of gears for opening and closing of gates. Boats passing through Damnoen Saduak Lock decreased from hundreds per day in the early days to only a few. The control of water level now is by operating of the Regulator Gate.

The Bang Nok Khwaek Lock is also in good working condition and it survived the bombing by the allies during World War II. The number of boats passing the lock decreased a lot from the time it was constructed due to availability of network of roads. The lock can still be used for controlling the water but for detail adjustment of the water level a new regulator, constructed in 1929, was used instead. Lock made irrigation possible dur to control of water levels leading to prosperity of the region.

Construction of the lock was completed in 1904 and becomes 119 years old in 2023. The lock is still fully functional with original parts except for small electric motors installed to assist operating of gears for opening and closing of gates. Boats passing through Damnoen Saduak Lock decreased from hundreds per day in the early days to only a few. The control of water level now is by operating of the Regulator Gate.

Bang Nok Khwaek Lock is in good working condition because it is part of the ongoing irrigation project to irrigate important fruit orchard growing area. The structures are suitable for present operation of the project. The problem of flooding is deal with by reduction of the water level prior to coming flood. The more frequent problem is the salt water encroachment in the dry season where water has to be released to safeguard the valuable orchard area. Additional water may have to be provided to the project, for this purpose and for dilution of waste water from the much larger irrigation project, the Greater Mae Klong Project.