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Thread: Landscaping in drainage easements

  1. #1
    Cyburbian hilldweller's avatar
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    Landscaping in drainage easements

    Does your code permit landscaping in drainage easements? Do you think landscaping should be allowed in swales? Will this adversely affect drainage? thanks.

  2. #2
    Cyburbian Jeff's avatar
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    What are you calling a drainage easement?

    Is is an overland swale, or an easement around a pipe.

    In swales its fine, promotes infiltration, slows velocity (limiting erosion)....over pipes, no....roots, maintenance issues if the pipe needs to come out, etc.

  3. #3
    Cyburbian imaplanner's avatar
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    I would think it may not be a good idea to do things ins swales which encourage the formation of a "wetland" lest all of a sudden you are required to have a 300 foot setback from your drainage swale.

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    Swales don't work right unless they are properly planted. Whatever is being proposed needs to be designed as part of the stormwater system, however, not just as random landscaping.

  5. #5
    Cyburbian hilldweller's avatar
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    Quote Originally posted by Jeff
    What are you calling a drainage easement?

    Is is an overland swale, or an easement around a pipe.

    In swales its fine, promotes infiltration, slows velocity (limiting erosion)....over pipes, no....roots, maintenance issues if the pipe needs to come out, etc.
    It's an overland swale. And it will be planted with a continuous hedge and probably some crape/wax myrtles.

  6. #6
    Cyburbian Jeff's avatar
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    ^^you should be fine, but then again I dont know the depth of swale, slope, side slopes...and I guess its grass?


    I could run calcs on it if you send me:

    Length of swale
    Side Slope
    Channel Width
    Slope of swale
    Swale surface
    Local 100 year rainfall intensity in/hr w/ 5.0 min Tc .... or I can use PA data if you dont know (wont vary greatly).
    Size of Drainage area, and cover type (w/ local C value if you know)

  7. #7
    Cyburbian hilldweller's avatar
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    Quote Originally posted by Jeff
    ^^you should be fine, but then again I dont know the depth of swale, slope, side slopes...and I guess its grass?


    I could run calcs on it if you send me:

    Length of swale
    Side Slope
    Channel Width
    Slope of swale
    Swale surface

    Local 100 year rainfall intensity in/hr w/ 5.0 min Tc .... or I can use PA data if you dont know (wont vary greatly).
    Thanks, but fortunately the water management district helps us with this.

  8. #8
    Cyburbian Tide's avatar
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    Just keep in mind for the swales if you are going to be putting landscaping in it there are a few "do nots"

    Do Not:
    1. Mulch the plantings
    2. Use green leaf trees or plants which will shed their leaves annually this makes a maintenance nightmare.
    3. neglect the maintenance... in 1 or 2 years you can make a man made wetlands.
    @GigCityPlanner

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