The City of Goddard recognizes that adequate storm water drainage is a problem that can be anticipated, and that good engineering and the application of reasonable engineering standards can help assure that neighborhoods are designed so that systems are in place to handle foreseeable storms without causing flooding or overwhelming drainage systems. For this reason, the City will require Master Drainage Plans and individual four-corner lot plans, and those items, will be used to establish minimum elevations for lowest openings.

(Ord. 840)

(a)      A Master Drainage Plan will be prepared by the developer’s engineer as a part of the final plat process. This Plan must be submitted for review purposes at least two weeks before the final plat is to be considered by the Subdivision Committee.

(b)     A Subdivision 4-Corner Grading Plan will be prepared by the developer’s engineer in conjunction with the plans for other infrastructure improvements, such as streets, storm drains, etc. and submitted to Stormwater.

(c)      The Subdivision 4-Comer Grading Plan will show, at a minimum, the following:

(1)          Street and lot layout.

(2)          Underground storm drain locations, and overflow locations for storm drains exceeding their design capacity.

(3)          Locations of open ditches and lakes.

(4)          Flow line elevations of storm drains at all inlets, manholes, and outfalls.

(5)          Proposed flow line elevations of all open ditches are based at a minimum of 100 feet intervals and 100-year base flood elevations.

(6)          The following information shall reflect on lakes:

(A)         Lake bottom elevation.

(B)          Normal pool elevation.

(C)          Two year and 100-year base flood elevations.

(D)         Two year and 100-year base inflows and outflows.

(7)          Design top of curb elevation at all points where drainage will be required to flow over the curb, or gutter line elevations at curb penetration box locations.

(8)          The flow line elevations of all open ditches or swales located within drainage easements at all lot comers and at 50 feet maximum intervals in between. Minimum slope for grassed ditches or swales shall be 1.00%. For lesser slopes, paved concrete swales or underground pipe with inlets shall be required.

(9)          For all lots, the following elevations:

(A)         Lowest view out window (if no window wells).

(B)          Walkout threshold elevation (if walkout is at grade).

(C)          Lowest water entry level if different than (A) or (B) above (for window wells or walkout pit).

(D)         Basement floor elevation, if not a walkout.

(d)     The Subdivision 4-Comer Grading Plan will provide detailed information for individual builders so that they will have all necessary information as to the type of structures that can be built on certain lots. The developer shall supply the Subdivision 4-Corner Grading Plan to the builder(s).

(e)      Subdivision plats shall clearly label all drainage facilities as easements, rights-of-way, or reserves when said facilities are used as a part of the Subdivision 4-Corner Grading Plan. Easements are required for underground pipe overflow facilities.

(1)          The statement “A” master drainage plan has been developed for this plat. All drainage easements, rights-of-way, and reserves shall remain at established grades (unless modified with the approval of the City Engineer) and shall be unobstructed to allow for the conveyance of stormwater in accordance with the Stormwater Manual. The maintenance of all drainageways and drainage facilities in backyard drainage easements and reserves shall be the responsibility of the property owner and shall be enforced by the Homeowner’ s Association and be provided for in the Homeowner’ s Association covenants.” shall be included on the face of the plat and within a restrictive covenant filed with the plat.

(2)          The restrictive covenant shall also state “The property owner shall provide a copy of the Individual Lot Grading Plan and the Individual Lot Grading Plan Certificate pertaining to such owner’s lot to any person installing a lawn, landscaping, fencing, or other improvements or structures and require them to maintain the grade levels shown on the Individual Lot Grading Plan Certificate.”

(Ord. 840)

(a)      Builders will be required to develop an Individual Lot Grading Plan consistent with the Subdivision 4-Comer Grading Plan and to construct basement and foundation walls to comply with said Plan. The objective is to ensure that final grades can be set so that they will work in substantial compliance with the Subdivision 4-Comer Grading Plan for the lot and area. Minor variances may be allowed providing there is no negative impact on the Subdivision 4-Comer Grading Plan and a minimum slope for grassed ditches or swales of 1.00% is met. Builders are urged to review deviations with the developer’s engineer before proceeding.

(1)          The individual lot grading plans shall include the top of foundation elevations as well as window well and view/walk out elevations and shall be submitted to MABCD before the underground plumbing inspection can be scheduled.

(2)          If a certification of minimum pad (low opening) elevation is needed relative to floodplains, it must be received before the framing inspection.

(3)          A standard basement will be allowed on a lot designated for a view out or walkout basement provided the lowest water entry point is maintained and the basement does not conflict with the approved Subdivision 4-Comer Grading Plan.

(A)         All structures will be constructed in strict accordance with the approved individual lot grading plans.

(B)          Builders will be required to get foundation elevation verification after basement walls are poured and before plumbing groundwork inspection to verify that wall elevations are built in accordance with the Individual Lot Grading Plan. This verification shall be provided by a licensed professional engineer or land surveyor and must be submitted to MABCD in order to obtain the plumbing groundwork inspection.

(b)     Builders are required to have a licensed professional engineer or land surveyor verify that the backyard drainage elevations are consistent with both the approved Subdivision 4. Comer Grading Plan and the Individual Lot Grading Plan. Certifications will be provided to the City of Goddard. The Builder will be required to submit the Individual Lot Grading Plan Certificate with the Individual Lot Grading Plan to the City of Goddard electronically in order to obtain a building permit and Certificate of Occupancy. The Builder will provide copies of these documents to the homeowner at closing.

(Ord. 840)

(a)      A homeowner may not install any improvements within a drainage easement that might obstruct the free flow of Stormwater.

(b)     In the event a homeowner experiences standing/nuisance water in a drainage easement, a private underground pipe system will be allowed through a Use of Easement Permit obtained from the Planning Department.

(c)      The property owner shall provide a copy of the Individual Lot Grading Plan and the Individual Lot Grading Plan Certificate pertaining to said owner’s lot to any person installing a lawn, landscaping, fencing, or other improvements or structures and require them to maintain the grade levels shown on the Individual Lot Grading Plan Certificate.

(a)      The City Engineer will review all lots submitted with a lot drainage plan for conformity to the master drainage plan. It will be the responsibility of the City Engineer or their representative to adequately interpret the survey and make a determination.

(b)     This result of the evaluation of the post construction survey by the City engineer will determine whether or not the City Planner or their representative will release the Certificate of Occupancy.

(Ord. 840)