EROSION AND SEDIMENTATION POLLUTION CONTROL NARRATIVE FOR

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EROSION AND SEDIMENTATION POLLUTION CONTROL NARRATIVE FOR PENNDOT DISTRICT 8-0 MAINTENANCE UNIT E00691 WORK ORDER #5 DEPARTMENT FORCE CULVERTS RETTEW Project No.

1 EROSION AND SEDIMENTATION POLLUTION CONTROL NARRATIVE FOR PENNDOT DISTRICT 8-0 MAINTENANCE UNIT E00691 WORK ORDER #5 DEPARTMENT FORCE CULVERTS RETTEW Project No (AD05) FOR ASPERS-BENDERVILLE ROAD SR 4006/ SEGMENT 0150/ OFFSET 0858 MENALLEN TOWNSHIP, ADAMS COUNTY PENNSYLVANIA Prepared by: RETTEW Associates, Inc Columbia Avenue Lancaster, PA July 24, 2007

2 INTRODUCTION This report is presented to coordinate erosion and sedimentation pollution control efforts during a culvert replacement project that is part of an ongoing open end agreement with the PennDOT District 8-0 Maintenance Unit. RETTEW will be submitting numerous E&S reports to PADEP (GP-11 s) for culvert replacement sites throughout the District s 8 counties (Adams, Cumberland, Dauphin, Franklin, Lancaster, Lebanon, Perry and York). This report is for the replacement of the culvert at Aspers-Benderville Road (SR 4006/ Segment 0150/ Offset 0858). Implementation of the plan will lead to effective and economical erosion and sedimentation pollution control during and after construction. The total earth disturbance for this project will be limited to 0.04 acres. Soil types and their extent are mapped in the application package. Plans are provided in Appendix B. The soils data was obtained from the Soil Survey of Adams County ( The major soil associated within the project area is Bowmansville Silt Loam (Bo). LOCATION The Aspers-Benderville Road Culvert (SR 4006/ Segment 0150/ Offset 0858) site is located in Menallen Township, Adams County, PA and appears on the Biglerville, PA 7.5-minute USGS quadrangle (Latitude N and Longitude W ). The upstream end of the culvert was surrounded by fallow species and orchard. The downstream end of the culvert was surrounded by a mowed lawn. PROJECT DESCRIPTION The project involves the replacement of an existing 80 lf long 27 x 43 CMP with an 80 lf long single 36 SLCPP. Rip-rap protection will be placed at the outlet. The roadway will be closed during construction and the stream channel pumped outside the work area. There is no roadway widening and the replacement is on the same alignment. The replacement is suggested due to the aging condition of the existing pipe and the lack of stream embedment. In addition, PennDOT is preparing for the repaving of this segment of the roadway and during that time, they would like to replace all existing, aging pipes at the same time to limit the disturbance needed for these routine maintenance activities. The drainage area to this culvert is 72.6 acres. The design calculations indicate that the existing pipe does not adequately convey the 10 year design storm (use 10 yr storm for local roads) without providing a headwater depth of 0.16 feet, however the roadway is not currently overtopped. RETTEW utilized the Rational Method to determine the peak flow to the site and Culvert Master (which utilizes the HDS-5 Methodology) to analyze culvert performance. RETTEW proposes replacing the elliptical CMP with a larger 36 SLCPP, which adequately conveys the 10 year storm without overtopping the roadway or providing a headwater depth. The hydraulic opening remains 6.3 sf even with the 6 embedment of the proposed pipe. The 10 year WSEL is very slightly increased by 0.05 feet (1/2 inch), but the 100 year WSEL is decreased by 0.37 feet. Therefore, the recommended replacement size is a 36 SLCPP with a 6 embedment. The stream is not in a detailed flood study area.

3 All disturbed areas of the site will be kept to a minimum and limited to the culvert replacement. Work will be conducted from the existing roadway, therefore no stabilized construction entrances are proposed. Erosion and sedimentation pollution will be managed through the use of silt fence, where appropriate, sand bags, a pump intake, discharge line and pump discharge, and temporary riprap at the pump discharge. After the new culvert is installed and the pump discharge removed, the temporary rip-rap protection will be placed at the permanent outlet rock filter location and the timely application of seeding and mulching mixtures to all exposed surfaces will be provided. RETTEW identified no wetlands and one bed and bank channel on the site. This watercourse is identified as an unnamed tributary to Opossum Creek and is considered a waters of the U.S. / waters of the Commonwealth. The Pennsylvania Code, Title 25, Chapter 93, Water Quality Standards assigns this basin a water quality designation of Trout Stocked Fishery (TSF). An online search of the Pennsylvania Natural Diversity Inventory (PNDI) database indicated that no potential impacts to threatened or endangered species. Because the project is within a bog turtle county, the Pennsylvania Fish and Boat Commission (PAFBC) and the US Fish and Wildlife Service (USFWS) were contacted. Both agencies indicated the proposed project would have no impact on species under their jurisdiction. Agency response letters are included in the permit application. A GP-11 and PASPGP-3 permit application was submitted to the PADEP for this project as part of this application package. EXISTING SOIL CONDITIONS Please refer to the soils map for the soil boundaries within the project site. Soils in and around the roadway construction site fall into the following categories and have been obtained from GIS using the latest USDA soil maps: ORIGINATOR: U.S. Department of Agriculture, Natural Resources Conservation Service Publication Date: 4/15/2004 Title: Soil Survey Geographic (SSURGO) database for Adams County, Pennsylvania Publication_Information: Publication_Place: Fort Worth, Texas Publisher: U.S. Department of Agriculture, Natural Resources Conservation Service Other_Citation_Details: pa071 Online_Linkage: URL: Bowmansville Silt Loam (Bo): This is a nearly level, very deep, somewhat poorly drained soil on flood plains. Slopes are smooth and range from 0 to 3 percent. Areas of this soil are long and narrow in shape and range from 5 to 100 acres in size. Permeability of this Bowmansville soil is moderate in the surface layer, moderately slow in the subsoil, and moderately rapid in the substratum. Available water capacity is high, but the high water table restricts rooting depth. The seasonal high water is a depth of 6 to 18 inches for most of the year. Surface runoff is very high. This soil is subject to frequent flooding for brief periods, mainly in late winter or early spring. In unlimed areas this

4 soil is strongly acid to slightly acid in the solum and strongly acid to neutral in the substratum. Most areas of this soil are used as pasture or woodland or are idle land. GENERAL SEQUENCE OF OPERATIONS All earth disturbance activities should proceed with the following sequence. Prior to disturbance during construction, place silt fence, if needed. Remove the silt fence once 70 percent of perennial vegetative cover has been established over all disturbed areas. 1. Close roadway. 2. Place silt fence as needed during construction. 3. Place sand bags, pump intake, pump discharge, and temporary rip-rap as indicated on the plans. 4. Excavate existing pipe and install discharge line as indicated on the plans. 5. Install proposed pipe as indicated on the plans. 6. Install permanent rip-rap apron (using rock from temporary protection) and remove excess temporary rock protection. 7. After pipe is set and final grade achieved, seed in accordance with Publication 408. EROSION & SEDIMENTATION POLLUTION CONTROL NOTES: A. General Erosion and Sediment Control Guidelines 1. A copy of this erosion and sedimentation pollution control report and plans must be available at the project site at all times. 2. Assure that the approved erosion and sedimentation pollution control is properly and completely implemented. 3. The intent of this plan/narrative is to indicate general means of compliance with the requirements of the rules and regulations of chapter 102 of the Pennsylvania Clean Streams Law. Implement these methods plus additional methods as may be necessary because of the conditions created by localized site conditions, and/or construction procedures in order to assure compliance with applicable law. Maintain all sediment and erosion control facilities so that they perform as required by law. 4. Prepare and submit to the appropriate conservation district or PADEP, an erosion and sedimentation pollution control plan for the site which will receive the spoil material, if spoil material or soil is removed from the site. 5. Assure that the best management practices are implemented, operated, and maintained properly and completely. Until the site achieves final stabilization, inspect all of the best management practices facilities. Maintain and make available to the Conservation

5 District or PADEP complete, written inspection logs of all those inspections. Immediately perform all maintenance work, including cleaning, repair, replacement, regarding, and stabilization. 6. Immediately upon discovering unforeseen circumstances posing the potential for accelerated erosion and/or sediment pollution, implement appropriate best management practices to eliminate potential for accelerated erosion and/or sediment pollution. 7. Before initiating any revisions to the approved erosion and sedimentation pollution control plan or revisions to other plans which may affect the effectiveness of the approved erosion & sedimentation control plan, receive approval of the revisions from the PADEP. 8. Assure that an erosion and sedimentation pollution control plan has been prepared and approved by the PADEP, and is being implemented and maintained for all soil and/or rock spoil and borrow areas, regardless of their locations. 9. Become thoroughly familiar with the provisions of the Appendix 64, Erosion Control Rules and Regulations, Title 25, Part 1, Department of Environmental Protection, Subpart C, Protection of Natural Resources, Article III, Water Resources, Chapter 102, Erosion Control. B. General Sediment And Erosion Control Methods/Procedures 1. Disturb the smallest practical area as possible in all cases. 2. Place all related erosion and sediment control facilities and be capable of functioning as intended prior to earthmoving activity within their contributing watershed areas. 3. Open utility excavations only long enough to properly install and inspect all underground facilities in accordance with applicable specifications. 4. Place excavated material (spoil) up slope from the excavation whenever possible. Direct runoff from spoil piles through a sediment filter structure and discharged in a non-erosive manner. 5. Discharge dewatering equipment directly onto a stabilized surface so that erosion does not occur. Direct all discharges through a sediment filter structure and discharged in a non-erosive manner. 6. Restore backfilled excavations to original type of cover and grade as per specifications. Seed according to schedule for permanent seeding and conform to Section 804 of PennDOT Publication 408M (2003). Temporary stabilization is required for any and all erodible/soluble areas and materials to be exposed. 7. Finish grade all lawn areas with four inches of topsoil unless otherwise noted. Positive drainage will be maintained away from all structures. No isolated low spots will be created.

6 8. Remove sediment spilled, dropped or tracked onto paved surfaces immediately. 9. At the end of each working day, remove any sediment tracked or conveyed onto a public roadway and re-deposited onto the construction site. Removal can be completed through use of mechanical or hand tools, but must never be washed off the road by use of water. 10. Dispose of sediment removed from the erosion and sedimentation pollution controls & facilities in landscaped areas outside of steep slopes, wetlands, floodplains or drainage swales and immediately stabilize or place in topsoil stockpiles. Submit an erosion & sedimentation plan to the Conservation District or PADEP for all off-site spoil areas. 11. Pump all sediment laden water through a dirt bag filtration device, or equivalent sediment removal facility, over non-disturbed vegetated areas. Establish discharge points to provide maximum distance to active waterways. 12. Should unforeseen erosive conditions develop during construction, take action to remedy such conditions and prevent damage to adjacent properties as result of increased runoff and/or sediment displacement. Maintain stockpiles of wood chips, hay bales, crushed stone and other mulches in readiness to deal immediately with emergency problems of erosion. 13. Install filter fabric fence at level grade. Both ends of each fence section must extend at least 8-0 upslope at 45 degrees to the main fence alignment. 14. Immediately replace any undermined or topped filter fence with rock filter outlet. See PADEP erosion and sedimentation pollution control manual, dated March 13, 2000, standard construction detail No. 18 for typical rock filter outlet detail. 15. Overlap, fold and staple filter fabric to prevent sediment bypass. Backfill and compact the toe anchor to a density equal to the surrounding soils. 16. Stockpile heights must not exceed 35. Stockpile slopes must be 2:1 or flatter. 17. Immediately after earth disturbance activities cease, stabilize any areas disturbed by the activities. During non-germinating periods, mulch at the specified rates. Stabilize in accordance with the temporary vegetative stabilization specifications. All disturbed areas which are not at finished grade and which will not be redisturbed within 1 year. Stabilize in accordance with the permanent vegetative stabilization specifications. All disturbed areas which are at finished grade or which will not be redisturbed within 1 year. 18. Stabilize diversion channels, sediment basins, sediment traps, and stockpiles immediately. 19. Remove sediment when accumulations reach 1/3 the height of the outlets. 20. Achievement of final stabilization is considered when it has a minimum uniform 70% perennial vegetative cover or other permanent non-vegetative cover with a density sufficient to resist accelerated surface erosion and subsurface characteristics sufficient to resist sliding and other movements.

7 21. Upon completion of all earth disturbance activities, removal of all temporary BMP s and permanent stabilization of disturbed areas, the owner/operator shall contact the ACCD for a final inspection prior to the removal of the BMP s. 22. All building materials and waste must be removed from the site and recycled or disposed of in accordance with the Department s Solid Waste management Regulations at 25 Pa. Code et seq., , and et seq. No building materials or waste or unused building materials shall be burned, buried, dumped or discharged at the site. 23. Any sediment removed from BMP s during construction will be returned to upland areas on site and incorporated into the site grading. C. Maintenance Of Sediment And Erosion Control Facilities 1. Until the site is stabilized, maintain all erosion and sediment best management practices properly. Immediately inspect all of the erosion and sediment pollution control best management practices after each runoff including clean out, repair, replacement, regrading, reseeding, remulching, and renetting. If erosion and sediment pollution control best management practices fail to perform as expected, replacement of best management practices, or modifications of those installed will be required. 2. Dispose of sediment removed from best management practices in landscaped areas outside of steep slopes, wetlands, floodplains or drainage swales and immediately stabilized, or placed in topsoil stockpiles. 3. Remove temporary erosion and sediment best management practices controls after final site stabilization. Areas disturbed during removal of the best management practices must be stabilized immediately. 4. At least 7 days before starting any earth disturbance activities, invite all contractors involved in those activities, the landowner, all appropriate municipal officials, the erosion and sediment pollution control plan preparer, and the PADEP or Adams County Conservation District to an on-site meeting. Also, at least 3 days before starting any earth disturbance activities, all contractors involved in those activities shall notify the Pennsylvania One Call System incorporated at for buried utilities locations. D. Restoration of planting areas 1. Perform final restoration no later than the start of the next planting season following construction. The planting season will be as established by the U.S. Agricultural Service for the area of construction. 2. Topsoil to be free from subsoil, brush, weeds, or other litter, clay lumps and stones, but may contain decaying vegetable matter as is present in good topsoil. 3. Exercise precautions as necessary to conform with laws relating to erosion and sediment control.

8 4. Seed to be not more than two (2) years old. Germination tests of seeds to be made not more than six (6) months prior to seeding. Do not use seed that has become wet, moldy, or otherwise damaged. 5. Submit all seed mixtures to the engineer for approval prior to seeding. 6. The contractor is responsible to produce a stand of grass in all seeded or sodded areas. Erosion, drought, or any other condition encountered does not relieve the contractor of this requirement. General When the location of spoil and borrow areas for the excavation material are determined, the contractor must submit Erosion and Sedimentation Pollution Control Plans to the PADEP or Adams County Conservation District for approval. Maintenance of erosion control features: Review condition of the silt barrier fence daily. Replace broken members and reset disturbed members. Remove accumulated sediment from the silt fence and dispose of it in a manner that prevents it from entering a stream. Review the condition of the pumped water filter bag daily. Replace any members that cannot be properly reset. Remove accumulated sediment from the filter when it has reached a depth of two feet. Dispose of it in a manner that prevents it from entering a stream. H:\07\ \Counties\Adams\AD05\Trans\E&S Narrative-AD05.doc

Erosion and Sediment Pollution Control Guidelines for Residential Lots with soil disturbance of less than 1 acre (see exceptions)

Adams Co. Conservation District 670 Old Harrisburg Road, Suite 201 Gettysburg, PA 17325 Telephone: 334-0636 Fax: 337-0730 www.adamscounty.us Erosion and Sediment Pollution Control Guidelines for Residential