(a) Sump Pumps.
(1) Sump pump requirements.
A. Residential homes with basements. A primary sump pump is required for all homes that have basements.
B. Residential homes with no basement but with a crawl space. A primary sump pump is required except for the following: If the footer tile around the crawl space can flow by gravity to an approved storm outlet, the sump pump requirement may be waived if approved by the City Engineer. A yard inlet with a grate to allow for the discharge of potential surcharge must be connected to the storm connection between the home and the approved storm outlet. A sump pump is still highly recommended for this situation.
C. Residential homes with no basement or crawl space. A primary sump pump is not required.
1. If there is a footer tile around the slab, then a gravity line must be run to an approved storm outlet. A yard inlet with a grate to allow for the discharge of potential surcharge must be connected to the storm connection between the home and the approved storm outlet.
2. If this is not able to be installed, then a sump pump may be required by the City Engineer.
D. An external sump pump is required, but, an internal sump pump will be accepted. If an internal sump pump is installed, all requirements in this subsection (a) must be followed.
E. No water-driven sump pumps are allowed for either the primary sump pump or secondary sump pump.
F. Battery back-up required. In addition to the required sump pump as indicated in this section, an auxiliary battery back-up pump is required. The battery back-up pump shall discharge separately from the required sump pump, directly to an area above grade. The discharge shall terminate a minimum of five feet beyond the foundation wall. Insect control at the point of termination shall be provided by a flap, screens, or other approved methods.
1. Buildings equipped with an additional emergency power source may have an additional standard electric backup sump pump.
(2) Discharge; primary sump pump.
A. The primary sump pump may discharge to either the storm sewer lateral connecting into the storm sewer main line or a road side ditch with approval of the City Engineer.
B. The primary sump pump may also discharge to daylight if there is no stormwater conveyance method in which the storm sewer lateral can flow to by gravity:
1. If discharging to daylight, the sump pump discharge must be outside of five feet from the home but within ten feet of the home and must discharge onto the lawn.
2. The sump pump may not discharge onto the driveway or other impervious surface.
(3) Secondary sump pump.
A. Battery back-up required. In addition to the required sump pump as stipulated in subsection (a)(1) hereof, an auxiliary battery back-up pump is required as indicated below. The battery back-up pump shall discharge separately from the required sump pump. Insect control at the point of termination shall be provided by a flap, screens, or other approved methods.
1. Buildings equipped with an additional emergency power source may have an additional standard electric backup sump pump.
B. The secondary sump pump can be either an external or internal sump pump and must discharge to daylight. A secondary sump pump is recommended for all homes, but required for those homes in a floodway, 100-year floodplain, or a 500-year floodplain.
1. The secondary sump pump discharge must be outside of five feet from the home but within ten feet of the home and must discharge onto the lawn.
2. The secondary sump pump may not discharge onto the driveway or other non-impervious surface without later discharging onto pervious area in which the flow may infiltrate into the ground water system before entering the city stormwater conveyance system.
(4) Sizing. Inaccurate sizing of the sump pump and the sump pit are a major cause for sump pump failure during flooding conditions. The sizing will be based on the area in which the footer tile drains into the sump crock, which is typically the basement and/or crawl space area. Below in Table 6 are the recommendations for sizing:
Table 6: Sizing Criteria
| ||||
Basement and crawl space (s.f.) | Minimum Pump Size | Minimum Pump Flow Rate | Minimum Pit Size ** | Number of Pumps |
< 2,500 s.f. | 1/2 hp | 72 gpm | 24 inches dia x 30 inches deep | 1 |
>2,500 s.f. | 1/2 hp | 72 gpm | 24 inches dia x 30 inches deep* | 2 |
* For a house with the basement/crawl space > 2,500 square feet, a dual sump pump system must be put into place. The two sump pump systems will be placed at opposite corners of the house unless approved by the City Engineer. | ||||
** If the 24 inch dia x 30 inch deep sump pit is not available, then two 18 inches x 22 inches sump pits may be used with an equalization pipe connecting the two. | ||||
(b) Site Discharge. No property may discharge stormwater onto a neighboring property unless a stormwater easement is in place or allowed by the City Engineer.
(1) An upstream property may discharge water to a downstream property owner as long as the area of discharge is natural and undisturbed. This upstream property may be maintained, but it cannot be altered to increase the flow downstream.
(2) A downstream property may create a vegetated or natural buffer which impedes the natural flow of water from an upstream property.
(3) Any SCM or water detention facility used for either a commercial or industrial property or a residential subdivision must have the effluent of the SCM or water detention facility flow into either a stream of the State or a major ditch unless authorized by the City Engineer.
(c) Storm Sewer System Damage. No property owner/contractor shall cause damage to the existing storm sewer conveyance system through:
(1) Disposal of items that create permanent or temporary blockage of the storm sewer conveyance system.
(2) Physically deform the existing system.
(d) Multi-User Private Storm Sewer Maintenance. When there is a private yard drain (a.k.a. there is no water from the City right-of-way draining to it) which drains multiple properties, then maintenance and financial responsibility of that drain and the subsequent drainage pipe is the responsibility of all property owners that drain into the outflow pipe. If there is a disagreement concerning the property owners that are responsible then the following needs to occur:
(1) The drainage line needs to be televised to see what structures are tied into the outflow pipe. The City Engineer, upon receiving this information, will decide what properties drain to the participating drainage structures. The City is not responsible for ensuring that responsible property owners participate financially.
(e) Landscaping.
(1) Any and all residents and commercial or industrial businesses must complete a permit prior to any landscaping design being performed on their property. This includes the design of any landscaping mounds or vegetation that will affect the drainage of the property. If there is a question, please contact the City Engineer. This permit shall be picked up at the Building Department at Avon City Hall. There is no fee for this permit.
(2) Any landscapers performing work within the City must be registered with the Building Department.
(3) Prior to performing work on a property within the City, it is suggested that the landscaping company pick up a copy of the approved final grade topography map (for residences) or approved site plan (for any commercial or industrial businesses).
(4) The landscaping company must conform with the drainage concept as depicted on the approved final grade topography map or approved site plan. Revisions to the approved plan are subject to the review and approval of the City Engineer.
(5) Violations of any of these provisions shall be subject to the penalties set forth in Section 1050.99, below.
(f) Landscaping Within a Floodplain.
(1) Any landscaper performing landscaping which results in a grade change (raising or lowering of the existing ground) must submit a floodplain landscaping permit. This permit shall be picked up at the Building Department at Avon City Hall.
(2) Any landscapers performing work within the City must be registered with the Building Department.
(3) Prior to performing work on a property within the City, it is required that the landscaping company pick up a copy of the approved final grade topography map (for residences) or approved site plan (for any commercial or industrial businesses).
(4) The landscaping company must conform with the drainage concept as depicted on the approved final grade topography map or approved site plan. Revisions to the approved plan are subject to the review and approval of the City Engineer.
(5) After the work is finished, a new final grade must be performed at the expense of the resident/contractor. The initial fee is paid for through the permit fee. If multiple final grade inspections occur, further fees may be assessed.
(6) Any work within a floodplain or floodway must follow the permitting process as described in Chapter 1464 - Flood Damage Prevention.
(7) Violations of any of these provisions shall be subject to the penalties set forth in Section 1050.99, below.
(Ord. 133-16. Passed 12-27-16.)