As much as I welcome the improvement you did, i want to remind you that you cannot do ANY modification to a heritage site without the approval of GM Team, as per rules say:
Heritage SitesA Heritage site is any location deemed by the Game Masters to be of significant value to the community. Heritage sites will be posted with GM Signs. Heritage Site RulesA ) You may not alter any heritage site without Game Master consent. (Heritage sites will be posted with GM signs) Punishment: You may be warned or banned based on the situation.
The Huser Canal IS a heritage site, and has 4 fantastic GM signs planted at both entrances, clearly stating you are not allowed to do any modification to it.