former lock manager stay in zoutkamp, holland

architectural architecture barrier bridge building canal civil connect connecting construction control controlling drainage dutch engineer engineering europe european floodgate foemwe groningen harbor harbour historical history holland infrastructure landmark level lock locks manager natural nature netherlands office outdoor outdoors outside protect protecting railing reitdiep rising river road safe safety separate separating sluice sluices stay surface technique technology tidal tide water waterlevel watermanagement waterwork waterworks weir zoutkamp