Article 10 — Erosion Control and Stormwater Management
Standards Incorporated by Reference
For the proper implementation of the requirements of this ordinance, the City will utilize policy, criteria, and information established by the Georgia Soil and Water Conservation Commission and within the latest edition of the Manual for Erosion and Sediment Control in Georgia.
Definitions Related to Soil Erosion, Sedimentation and Pollution
Control See Article 14 Interpretation and Definitions for definitions that relate to Soil Erosion, Sedimentation and Pollution Control.
Exemptions
Division I of this Article shall apply to any land-disturbing activity undertaken by any person on any land except for the following:
12-7-6 and this paragraph. For single-family residence construction covered by the provisions of this paragraph, there shall be a buffer zone between the residence and any state waters classified as trout streams pursuant to Article 2 of Chapter 5 of the Georgia Water Quality Control Act. In any such buffer zone, no land-disturbing activity shall be constructed between the residence and the point where vegetation has been wrested by normal stream flow or wave action from the banks of the trout waters.
For primary trout waters, the buffer zone shall be at least 50 horizontal feet, and no variance to a smaller buffer shall be granted. For secondary trout waters, the buffer zone shall be at least 50 horizontal feet, but the Director may grant variances to no less than 25 feet. Regardless of whether a trout stream is primary or secondary, for first order trout waters, which are streams into which no other streams flow except for springs, the buffer shall be at least 25 horizontal feet, and no variance to a smaller buffer shall be granted. The minimum requirements of subsection (b) of O.C.G.A. 12-7-6 and the buffer zones provided by this paragraph shall be enforced by the Local Issuing Authority;
Minimum Requirements for Erosion, Sedimentation and Pollution
Control Using BMPs
Excessive soil erosion and resulting sedimentation can take place during land-disturbing activities if requirements of Division I of this Article and the NPDES General Permit are not met. Therefore, plans for those land-disturbing activities which are not exempted by Division I of this Article shall contain provisions for application of soil erosion, sedimentation and pollution control measures and practices. The provisions shall be incorporated into the erosion, sedimentation and pollution control plans. Soil erosion, sedimentation and pollution control measures and practices shall conform to the minimum requirements of Section 1004.02 and Section 1004.03 of this Article. The application of measures and practices shall apply to all features of the site, including street and utility installations, drainage facilities and other temporary and permanent improvements. Measures shall be installed to prevent or control erosion, sedimentation and pollution during all stages of any land-disturbing activity in accordance with requirements of Division I of this Article and the NPDES General Permit.
The rules and regulations, ordinances, or resolutions adopted pursuant to O.C.G.A. 12-7-1 et. seq. for the purpose of governing land-disturbing activities shall require, as a minimum, protections at least as stringent as the state general permit; and best management practices, including sound conservation and engineering practices to prevent and minimize erosion and resultant sedimentation, which are consistent with, and no less stringent than, those practices contained in the Manual for Erosion and Sediment Control in Georgia published by the Georgia Soil and Water Conservation Commission as of January 1 of the year in which the land-disturbing activity was permitted, as well as the following:
Application/Permit Process
The property owner, developer and designated planners and engineers shall design and review before submittal the general development plans. The Local Issuing Authority shall review the tract to be developed and the area surrounding it. They shall consult this Development Code, and any other ordinances, rules, regulations or permits, which regulate the development of land within the jurisdictional boundaries of the Local Issuing Authority.
However, the owner and/or operator are the only parties who may obtain a permit.
of O.C.G.A. 12-5-23, provided that such fees shall not exceed $80.00 per acre of land-disturbing activity, and these fees shall be calculated and paid by the primary permittee as defined in the state general permit for each acre of land-disturbing activity included in the planned development or each phase of development. All applicable fees shall be paid prior to issuance of the land disturbance permit. In a jurisdiction that is certified pursuant to subsection (a) of O.C.G.A. 12-7-8 half of such fees levied shall be submitted to the Division; except that any and all fees due from an entity which is required to give notice pursuant to paragraph (9) or (10) of O.C.G.A. 12-7-17 shall be submitted in full to the Environmental Protection Division, regardless of the existence of a Local Issuing Authority in the jurisdiction.
Maps, drawings and supportive computations shall bear the signature and seal of the certified design professional. Persons involved in land development design, review, permitting, construction, monitoring, or inspections or any land disturbing activity shall meet the education and training certification requirements, dependent on his or her level of involvement with the process, as developed by the Commission and in consultation with the Division and the Stakeholder Advisory Board created pursuant to O.C.G.A. 12-7-20.
Inspection and Enforcement
months of any amendments to the Erosion and Sedimentation Act of 1975.
Penalties and Incentives
If any person commences any land-disturbing activity requiring a land-disturbing permit as prescribed in Division I of this Article without first obtaining said permit, the person shall be subject to revocation of his business license, work permit or other authorization for the conduct of a business and associated work activities within the jurisdictional boundaries of the Local Issuing Authority.
If, through inspection, it is determined that a person engaged in land-disturbing activities has failed to comply with the approved plan, a written notice to comply shall be served upon that person. The notice shall set forth the measures necessary to achieve compliance with the plan and shall state the time within which such measures must be completed. If the person engaged in the land-disturbing activity fails to comply within the time specified, he shall be deemed in violation of Division I of this Article and, in addition to other penalties, shall be deemed to have forfeited his performance bond, if required to post one under the provisions of Section 1005.02(5). The Local Issuing Authority may call the bond or any part thereof to be forfeited and may use the proceeds to hire a contractor to stabilize the site of the land-disturbing activity and bring it into compliance.
Education and Certification
Administrative Appeal and Judicial Review
The suspension, revocation, modification or grant with condition of a permit by the Local Issuing Authority upon finding that the holder is not in compliance with the approved erosion, sediment and pollution control plan; or that the holder is in violation of permit conditions; or that the holder is in violation of any ordinance; shall entitle the person submitting the plan or holding the permit to a hearing before the Zoning Board of Appeals within ten days after receipt by the Local Issuing Authority of written notice of appeal.
Any person, aggrieved by a decision or order of the Local Issuing Authority, after exhausting his administrative remedies, shall have the right to appeal de novo to the Superior Court of Gwinnett County.
Liability
Division II. Site Grading
Requirements
Grading plans shall outline the areas which are required to remain undisturbed (i.e., Tree Protection Areas, buffers, etc.) and shall indicate protective fencing or staking to be placed surrounding such areas.
If the property is within the jurisdiction of the Metropolitan River Protection Act, the grading shall be consistent with the River Corridor Certificate approved for the project.
Embankments shall be placed in uniform layers not to exceed a compacted thickness of 6 inches per layer and shall be compacted to a density of 95% of the maximum laboratory dry weight per cubic foot as determined by AASHTO Method T-99 in all areas where structure, parking lots and drives, streets, and utilities are to be placed. All other embankments are to be compacted to at least 85%.
While most soils in the area can be safely stabilized at a 2:1 slope, some soils exhibit a low shearing resistance and a low cohesiveness. These soils typically are micaceous silts and sandy soils with little or no clay. If the 2:1 slope shows evidence of shearing, non-cohesiveness, sliding, or inability to maintain compaction, the slope shall be stabilized at 3:1 or by using such mechanical methods as needed (such as retaining walls or "grow mats" stapled in place) to maintain slope, height, and integrity.
Division III. Stormwater Culvert and Pipe Drainage System
Purpose
The purpose of Division III of this Article to establish the standards for stormwater conveyance facilities for the protection of public rights-of-way and adjoining private properties. Stormwater conveyance facilities will be designed to carry runoff from more than one parcel, existing or proposed, in a manner that maintains the public health, safety, and environment. In order to reduce flooding, promote adequate drainage, and reduce maintenance certain pipe materials are required depending upon usage and location of pipes. Stormwater conveyance systems may include but are not limited to culverts, storm drainage pipes, catch basins, drop inlets, junction boxes, headwalls, gutter, swales, channels, and ditches.
Standards Incorporated by Reference
The latest edition of the Georgia Stormwater Management Manual, including any relevant local addenda to these manuals, will be utilized as policy, criteria, and information for the proper implementation of the requirements of this code, including technical specifications and standards. The manual may be updated and expanded periodically, based on improvements in science, engineering, monitoring and local maintenance experience.”
The latest edition of the Standard Specifications Construction of Transportation Systems by the Georgia Department of Transportation, including any relevant local addenda to these standards, is hereby incorporated by reference into Division III of this Article.
Standard Specifications
Pipe shall be manufactured in accordance with AASHTO M-170 and/or ASTM C-76. Class of pipe and wall thickness shall be in accordance with 1030-D, Georgia DOT specification, Table No.1.
Pipe Installation
Stormwater System Design Criteria
shaped cross-sections are not permitted in grassed channels.
Division IV. Post-Development Stormwater Management
Purpose and Intent
The purpose of this article is to protect, maintain and enhance the public health, safety, environment and general welfare by establishing minimum requirements and procedures to control the adverse effects of increased post-construction stormwater runoff and nonpoint source pollution associated with new development and redevelopment. Proper management of post-construction stormwater runoff will minimize damage to public and private property and infrastructure, safeguard the public health, safety, environment and general welfare of the public, and protect water and aquatic resources. Additionally, the City of Duluth is required to comply with several State and Federal laws, regulations and permits and the requirements of the Metropolitan North Georgia Water Planning District’s regional water plan related to managing the water quantity, velocity, and quality of post-construction stormwater runoff.
Standards Incorporated by Reference and Adoption and
Implementation of the GSMM; Conflicts and Inconsistencies
The latest edition of the Georgia Stormwater Management Manual, including any relevant local addenda to the manual, will be utilized as policy, criteria, and information for the proper implementation of the requirements of this code, including technical specifications and standards. These manuals may be updated and expanded periodically, based on improvements in science, engineering, monitoring and local maintenance experience.
The latest edition of the Standard Specifications Construction of Transportation Systems by the Georgia Department of Transportation, including any relevant local addenda to these standards, is hereby incorporated by reference into Division V of this Development Code.
Definitions
See Article 14 Interpretation and Definitions for definitions that relate to this section.
Designation of Administrator, Applicability Criteria for Stormwater
Management Standards, and Exemptions from Stormwater Management Standards
The City Manager may from time to time appoint someone to administer and implement this Article.
Stormwater Management Standards
Subject to the applicability criteria in Section 1020.02 and exemptions in Section 1020.03, the following stormwater management standards apply. Additional details for each standard can be found in the GSMM Section 2.2.2.2:
Resources to be identified, mapped, and shown on the Stormwater Management Plan, shall include, at a minimum (as applicable):
Pre-Submittal Meeting, Stormwater Concept Plan, and Stormwater
Management Plan Requirements
Applicants must request a pre-submittal meeting with the City of Duluth when applying for a Determination of Infeasibility through the Practicability Policy.
Application Fee, Application Procedures, and Compliance with the
Approved Stormwater Management Plan
The fee for reviewing any land development application shall be based on the fee structure established by the City of Duluth, and payment shall be made before the issuance of any land disturbance permit or building permit for the development.
Land development applications are handled as part of the process to obtain the land disturbance permit pursuant to the Duluth Unified Development Code or building permit pursuant the Duluth Building Code, as applicable.
Before any person begins development on a site, the owner of the site shall first obtain approval in accordance with the following procedure:
Periodic inspections of the stormwater management system during construction shall be conducted by the staff of the City of Duluth or conducted and certified by a professional engineer who has been approved by the City of Duluth. Inspections shall use the approved stormwater management plan and the construction sequencing plan for establishing compliance. All inspections shall be documented with written reports that contain the following information:
Upon completion of the development, the applicant is responsible for:
The required certification under part (a) shall include a certification of volume, or other performance test applicable to the type of stormwater management system component, to ensure each component is functioning as designed and built according to the design specifications in the approved stormwater management plan. This certification and the required performance tests shall be performed by a qualified person and submitted to the City of Duluth with the request for a final inspection. The City of Duluth shall perform a final inspection with applicant to confirm applicant has fulfilled these responsibilities.
Any violation of the approved stormwater management plan during construction, failure to submit as-built drawings, failure to submit a final BMP landscaping plan, or failure of the final inspection shall constitute and be addressed as violations of, or failures to comply with, the underlying land disturbance permit pursuant to the Duluth Unified Development Code or the underlying building permit pursuant to the Duluth Building Code. To address a violation of this Article, the City of Duluth shall have all the powers and remedies that are available to it for other violations of building and land disturbance permits, including without limitation the right to issue notices and orders to ensure compliance, stop work orders, and penalties as set forth in the applicable ordinances for such permits.
Ongoing Inspection and Maintenance of Stormwater Facilities and
Practices
For any stormwater management systems approved and built based on requirements predating the current GSMM and that is not otherwise subject to an inspection and maintenance agreement, such stormwater management systems shall be maintained by the owner so that the stormwater management systems perform as they were originally designed.
notice, constitute a failure to maintain the stormwater management system.
The terms of the inspection and maintenance agreement shall provide for the City of Duluth’s right of entry for maintenance inspections and other specified purposes. If a site was developed before the requirement to have an inspection and maintenance agreement or an inspection and maintenance agreement was for any reason not entered into, recorded, or has otherwise been invalidated or deemed insufficient, then the City of Duluth shall have the right to enter and make inspections pursuant to the City of Duluth’s general provisions for property maintenance inspections pursuant to the City of Duluth Municipal Code.
The terms of the inspection and maintenance agreement shall provide for what constitutes a failure to maintain a stormwater management system and the enforcement options available to the City of Duluth. If a site was developed before the requirement to have an inspection and maintenance agreement or an inspection and maintenance agreement was for any reason not entered into, recorded, or has otherwise been invalidated or deemed insufficient, then:
Division V. Illicit Discharge and Illegal Connection
Purpose and Intent
Definitions Related to Illicit Discharge and Illegal Connection
See Article 14 Interpretation and Definitions for definitions that relate to Illicit Discharge and Illegal Connection.
Applicability
Division V of this Article shall apply throughout the incorporated area of the City of Duluth. The City may enter into agreements with other municipalities to carry out the purpose of this Code Division. These agreements may include, but are not limited to, enforcement of provisions, resolution of disputes, and cooperative monitoring and management of the separate storm sewer system and management programs.
Illicit Non-Stormwater Discharge and Illicit Connection
Notifications in person or by phone shall be confirmed by written notice addressed and mailed to the department within three business days of the phone or in person notice. If the discharge emanates from a commercial or industrial establishment, the owner or operator of such establishment shall also retain an on-site written record of the discharge and the actions taken to prevent its recurrence. Such records shall be retained for at least three years. Said person shall also take immediate steps to ensure no recurrence of the discharge or spill.
Within ten working days after abatement of the violation by the department or its contractors, the owner of the property will be notified of the cost of abatement, including administrative costs. The property owner may file a written protest objecting to the assessment or to the amount of the assessment within ten working days of such notice. If the amount due is not paid within 30 days after receipt of the notice, or if an appeal is taken, within 30 days after a decision on said appeal, the charges shall become a special assessment against the property and shall constitute a lien on the property for the amount of the assessment. Any person violating any of the provisions of this Code Division shall become liable to the City by reason of such violation.
For violations of this Code Division, the department may issue a citation to the alleged violator requiring such person to appear in a court of competent jurisdiction to answer charges for such violation. Upon conviction, such person shall be punished by a fine not to exceed $2,500.00 or imprisonment for 60 days or both. Each act of violation and each day upon which any violation shall occur shall constitute a separate offense.
In addition to the enforcement processes and penalties provided, any condition caused or permitted to exist in violation of any of the provisions of this Code Division is a threat to public health, safety, welfare, and environment and is declared and deemed a nuisance, and may be abated by injunctive or other equitable relief as provided by law.
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