2013 PGSCD Soil Erosion & Sediment Control – Pond Safety Reference
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PRINCE GEORGE’S SOIL CONSERVATION DISTRICT SOIL EROSION & SEDIMENT CONTROL – POND SAFETY REFERENCE MANUAL – PRINCE GEORGE’S COUNTY, MARYLAND JULY 2013 Prince George’s Soil Conservation District 5301 Marlboro Race Track Road Upper Marlboro, MD 20772 Phone (301) 574-5162 – Fax (301) 574-5156 INTRODUCTION Dependence on the natural resources of Maryland is unending---and so is the need to protect our environment. The soil and water conservation program in Maryland, aimed at protecting soil and water resources, is the result of over 70 years of cooperative effort at the federal, state, and local levels. Under the State Soil Conservation District's Law, each Board of Supervisors is responsible for carrying out a soil and water conservation program to "provide for the conservation of the soil, water, and related resources of the state and for the control and prevention of soil erosion in order to preserve natural resources, control floods, prevent impairment of dams and reservoirs, assist in maintaining the navigability of rivers and harbors, preserve wildlife, protect the tax base, protect the public lands, protect and promote the health, safety, and general welfare of the people of the state, and otherwise enhance their living environment". Acceptable erosion and sediment control plans must be designed to mitigate soil erosion, prevent increases in stormwater runoff, and minimize the discharge of pollutants. The Maryland Stormwater Management Act of 2007 and the 2011 Maryland Standards and Specifications for Soil Erosion and Sediment Control requires the establishment of a comprehensive process for the review and approval of erosion and sediment control and stormwater management plans. A coordinated comprehensive review process includes the submission and review of erosion and sediment control and stormwater management plans for each of the following three phases of plan development: Concept Plan; Site Development Plan; and Final Plan. This manual is intended to be a reference guide for engineers, developers, reviewers, and inspectors who will be involved with design and implementation of erosion and sediment control practices and dam safety. Existing references have been updated and consolidated into one document. As a service to our customers, we have attempted to simplify and clarify requirements from various sources. This manual will be used by our plan reviewers to ensure consistency in the plan review process and should be the basis for plan preparation and submittal by engineering consultants. The Prince George’s Soil Conservation District prohibits discrimination in all its programs and activities on the basis of race, color, national origin, sex, religion, age, disability, political beliefs, sexual orientation, or marital or familial status. CONSERVATION – DEVELOPMENT – SELF-GOVERNMENT i ACKNOWLEDGEMENTS The latest revisions to the Prince George’s Soil Conservation District Soil Erosion and Sediment Control – Pond Safety Manual, January 2013, are the result of the effort of the Erosion and Sediment Control Environmental Site Design Committee. The committee consisted of members representing Prince George’s Soil Conservation District (PGSCD), Prince George’s County Department of Public Works and Transportation (PGDPW&T), Maryland-National Capital Building Industry Association (BIA) and engineering consultant firms. Many individuals assisted with the revision to this document by providing review comments, suggestions, reference documents, and participation at committee meetings. We would like to acknowledge the following individuals for their invaluable contributions: Graham M. Baldwin Prince George’s County DPW&T Gurmeet S. Gahunia Dewberry and Maryland-National Capital BIA Lance C. Gardner Prince George’s Soil Conservation District Michael A. Novy Ben Dyer Associates, Inc. and Maryland-National Capital BIA Rand Postell Stantec, formerly Greenhorne and O’Mara Supreet K. Rekhi Prince George’s Soil Conservation District Brenda K. Sanford Prince George’s Soil Conservation District John Tarr Prince George’s County DPW&T Massoud Towhidi Capitol Development Design, Inc. Michael E.Wagner Loiederman Soltesz Associates and Maryland-National Capital BIA Eugene K. Whitehead Prince George’s Soil Conservation District The Prince George’s Soil Conservation District, Board of Supervisors approved and adopted the revised manual. We hope this consolidated and updated information will be helpful and encourage interested persons to contribute their experiences and knowledge in a continuing process of program improvement. ii Table of Contents Section I - PGSCD Concept Grading, Erosion and Sediment Control Plan (CSC) Page A. Introduction for Concept Grading, Erosion and Sediment Control Plans………. I-1-2 B. Concept Grading, Erosion and Sediment Control Plan Design Considerations………………………………………………………………..…. I-3-5 C Concept Grading, Erosion and Sediment Control Plan Preparation……………. I-6-7 D. Preliminary Soil Report Requirements…………………………………………. I-8 E. COMAR Highly Erodible Soils Map…………………………………………… I-9-14 F. Highly Quality (Tier II) Waters……………………………………………….... I-15-18 G. Sediment Impairments and TMDLS…………………………………..………... I-19-22 H. Concept Grading, Erosion and Sediment Control Plan Submittal……………… I-23 I. PGSCD Concept Grading, Erosion and Sediment Control Fees……………..… I-24-25 J. Concept Grading, Erosion and Sediment Control Plan Approval…………..….. I-26 K. PGSCD Concept Grading, Erosion and Sediment Control Approval Stamp…………………………………………………………………...…...….. I-27-28 L. PGSCD Concept Grading, Erosion and Sediment Control Plan Transmittal Letter……………………………………………………………….. I-29 M. PGSCD Concept Grading, Erosion Sediment Control Plan Site Analysis…..…. I-30 Section II – PGSCD Environmental Site Development Grading, Erosion and Sediment Control Plan (SSC) A. Introduction for Environmental Site Development Grading, Erosion and Sediment Control Plans……………………………..………………………. II-1 B. Environmental Site Development Grading, Erosion and Sediment Control Plan Design Considerations………………………………….. II-2-4 C. Environmental Site Development Grading, Erosion and Sediment Control Plan Preparation……………………………….…………..…. II-5-6 D. PGSCD Small Pond Soil Reports and Borrow Areas…………..…………….…. II-7 E. PGSCD Dam Hazard Classification………………………………….…….……. II-8-9 F. TR-66 Simplified Dam-Breach Routing Procedure………………………..……. II-10 G. Preliminary Pond Exemptions…………………………………………..….……. II-11-12 H. Examples of Embankment, Excavated and Exempt Ponds……………………… II-13-18 I. Maryland Average Rainfall from NOAA Atlas 14…………………………….... II-19 J. Environmental Site Development Grading, Erosion and Sediment Control Plan Submittal…………………………..……………….…… II-20 K. PGSCD Environmental Site Development Grading, Erosion and Sediment Control Fees…………………………….……………….. II-21-22 L. Environmental Site Development Grading, Erosion and Sediment Control Plan Approval……………………………………………….. II-23-24 M. PGSCD Environmental Site Development Grading, Erosion and Sediment Control Approval Stamp…………………..…………….. II-25-28 N. PGSCD Environmental Site Development Grading, Erosion and Sediment Control Plan Transmittal Letter…………………………. II-29 O. PGSCD Environmental Site Development Grading, Erosion and Sediment Control Plan Site Analysis……………………..…..……. II-30 iii Table of Contents Section III – PGSCD Final Grading, Erosion and Sediment Control Plan (FSC) Page A. Introduction for Final Grading, Erosion and Sediment Control Plans……………………………………………………………..……… III-1-2 B. Final Grading, Erosion and Sediment Control Plan Design Considerations…………………………………………………………..……….. III-3-8 C. Final Grading, Erosion and Sediment Control Plan Preparation………………... III-9-15 D. Final Soil Report Requirements……………………………………………….… III-16-17 E. Final Grading, Erosion and Sediment Control Practices Review Checklist………………………………………………………………... III-18-24 F. Vegetative Stabilization……………………..………………………………….. III-25-35 G. Critical Area Planting Code-342…………………………………..……………. III-36-59 H. UM Turfgrass Technical Update TT-77, July 2012……………………..……… III-60-66 I. Final Rough Grading Plan Checklist……………...…………………..………… III-67-68 J. Final Grading, Erosion and Sediment Control Plan Submittal………………..... III-69 K. PGSCD Final Grading, Erosion and Sediment Control Plan Fees……………… III-70-72 L. Final Grading, Erosion and Sediment Control Plan Approval………………….. III-73-74 M. PGSCD Final Grading, Erosion and Sediment Control Approval Stamp..…...... III-75-78 N. PGSCD Final Grading, Erosion and Sediment Control Plan Transmittal Letter……………………………………………………………...... III-79 O. PGSCD Final Grading, Erosion and Sediment Control Plan Site Analysis…….…………………………………………………………..….. III-80 P. Final Grading, Erosion and Sediment Control Plan Updates….….……….….... III-81-82 Q. Adequacy of Existing Erosion and Sediment Controls Checklist….…..………. III-83-88 R. Minor Plan Changes…………………………………………..…………..……. III-89 S. Major Plan Changes…………………………………..…………..……..……… III-90 T. Locations of Resource Documents……………………………………..…..….. III-91-92 Section IV – PGSCD Standard Erosion and Sediment Control Plan A. Standard Erosion and Sediment Control Plan Checklist….……..……….……. IV-1 B. Non-Tidal Wetlands of Special State Concern………………………………… IV-2 C. Sample copy of PGSCD Standard Erosion and Sediment Control Plan……………………………………………………....……….…… IV-3-4 Section V – Prince George’s Soil Conservation District Details A. PGSCD Detail – 1 Sediment Basin Horizontal Draw – Down Device………… V-1-4 B. PGSCD Detail – 2 Sandbag Diversion…………………………………………. V-5-8 iv Table of Contents Section VI – PGSCD Forest Harvest