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HomeMy WebLinkAboutWPO201300012 Assessment - Environmental 2013-02-11 EROSION &SEDIMENT CONTROL NARRATIVE Church Campus Improvements Crozet United Methodist Church,Crozet Virginia PROJECT DESCRIPTION This project is necessitated because of Church Property acquisition by VDOT for the Jarman's Gap Road Project and the County acquiring Church property and building a new future Public Entrance into as a part of the Crozet Avenue Streetscape Project. Site improvements include replacement parking areas, replacement pedestrian and handicap access facilities, relocated playground area,and new utilities to support the site improvements. Approximately 1.97 acres, including on-site and off-site areas,will be disturbed during construction. EXISTING SITE CONDITIONS The topographic and existing conditions on the site are depicted on the accompanying plans. The site currently consists of gravel parking areas,pedestrian pavements,a playground and grass areas. ADJACENT AREAS The project area is bounded on the north by the Blue Goose properties, on the south by Jarman's Gap Road, on the east by Crozet Avenue and on the west by Carter Street and a small commercial property. OFF-SITE AREAS The majority of the work will occur on-site,but the Owner also has an agreement with the Blue Goose property Owner to permit temporary, gravel staging and parking areas on that property during site construction. These gravel facilities will be completely removed and the areas restored to pre-existing conditions at the end of construction. SOILS Four soil boring where taken and a soils report was also prepared by Froehling and Robertson for the project. The soil boring summaries are attached to this document. The Soil Types and associated areas, from the Soils Survey of Albemarle County are shown on the Erosion and Sediment Control Plan. The soil survey soils include: 7B - Braddock Loam. Fine,mixed,semiactive,misic typic hapludults. These soils are formed in allubium and dcolluvium derived from acid crystalline rocks located on fans, and mountains. The surface water runoff class is medium and the natural drainage condition of the soil is well drained. The seasonal water table is at a depth of more than 6 feet. Slope gradient in the 2%-7% range. 36C- Hayesville Loam. Fine,kaolinitic,mesic typic kanhapludults. These soils are formed in residuum weathered from granite and gneiss located on hillslopes and piedmonts. The surface water runoff class is medium and the natural drainage condition of the soil is well drained. The seasonal high water table is at a depth of more than 6 feet. Slope gradient is typically 7%-15%. CRITICAL AREAS There are no critical areas on site ANHOLD ASSOCIATES February 8, 2013 1 EROSION&SEDIMENT CONTROL NARRATIVE Church Campus Improvements Crozet United Methodist Church,Crozet Virginia EROSION AND SEDIMENT CONTROL MEASURES The contractor shall provide,construct and maintain erosion and sediment control measures as shown on the Erosion Control Plan and in accordance with the Virginia Department of Transportation,and the County of Albemarle. All vegetative and structural erosion and sediment control practices shall be constructed and maintained according to the minimum standards and specifications of the Virginia Erosion and Sediment Control Handbook. Permanent or temporary soil stabilization shall be applied to denuded areas within seven (7) days after final grade is reached on any portion of the site. Temporary soil stabilization shall be applied within seven (7) days to denuded areas that may not be at final grade but will remain dormant (undisturbed) for longer than 30 days. Permanent stabilization shall be applied to areas that are to be left dormant for more than one year. Soil stabilization refers to measures that protect soil from the erosive forces of raindrop impact and flowing water. Applicable practices include vegetative establishment, mulching,and the early application of gravel base on areas to be stone. Soil stabilization measures should be selected to be appropriate for the time of the year,site conditions,and estimated duration of use. Sediment basins and traps,perimeter dikes,sediment barriers and other measures intended to retain sediment shall be constructed as a first step in any land-disturbing activity and be make functional before up slope land disturbance takes place. Stabilization measures shall be applied to any earthen structures such as dams, dikes and diversions immediately after installation. The following structural practices will be implemented according to the requirements set forth by the Virginia Erosion and Sediment Control Manual. a) Temporary Stone Construction Entrance (3.02) - Due to the small areas and accessibility issues, the existing entrance road is proposed as the construction entrance. Where construction vehicle access routes intersect paved public roads or paved private access areas, provisions shall be made to minimize the transport of sediment by vehicular tracking onto the paved surface. Where sediment is transported onto an adjacent private or public road surface, the road shall be cleaned thoroughly. Sediment shall be removed from the roads by shoveling or sweeping and transported to a sediment control disposal area. Street washing shall be allowed only after sediment is removed in this manner. b) Construction Road Stabilization (3.03) -The temporary stabilization of access roads, subdivision roads, parking areas,and other on-site vehicle transportation routes with stone immediately after grading. To reduce the erosion of temporary roadbeds by construction traffic during wet weather. To reduce the erosion and subsequent regarding of permanent roadbeds between the time of initial grading and final stabilization. c) Silt Fence (3.05)-A temporary sediment barrier constructed of posts,filter fabric and in some cases,a wire support fence, placed across or at the toe of a slope or in a minor ANHOLD ASSOCIATES February 8, 2013 2 EROSION &SEDIMENT CONTROL NARRATIVE Church Campus Improvements Crozet United Methodist Church,Crozet Virginia drainage way to intercept and detain sediment and decrease flow velocities from drainage areas of limited size;applicable where sheet and rill erosion or small concentrated flows may be a problem. Maximum effective life is six (6) months. d) Drop Inlet Protection(3.07) -A sediment filter or an excavated impounding area around a storm drain drop inlet or curb inlet to prevent sediment from entering storm drainage systems prior to permanent stabilization of the disturbed areas. e) Curb Inlet Protection (3.07) - A sediment filter or an excavated impounding area around a storm drain drop inlet or curb inlet to prevent sediment from entering storm drainage systems prior to permanent stabilization of the disturbed areas. f) Stormwater Conveyance Channel (3.17) - A permanent, designed waterway, shaped, sized, and lined with appropriate vegetation or structural material used to safely convey Stormwater runoff within or away from developing areas. g) Outlet Protection (3.18) -Structurally lined aprons or other acceptable energy dissipating devices placed at the outlets of pipes or paved channel sections. To prevent scour at Stormwater outlets, to protect the outlet structure,and to minimize the potential for downstream erosion by reducing the velocity and energy of concentrated Stormwater flows. h) Topsoiling (3.30) - Methods of preserving and using the surface layer of undisturbed soil, often enriched in organic matter,in order to obtain a more desirable planting and growth medium. i) Temporary Seeding (3.31) -Establishment of temporary vegetative cover by planting rapidly growing annual plant seed on rough-graded areas. j) Permanent Seeding (3.32) -The establishment of perennial vegetative cover on disturbed areas by planting seed. k) Sodding (3.33) -Stabilizing fine-graded disturbed areas by establishing permanent stands of grass with sod. 1) Dust Control (3.39) - Reducing surface and air movement of dust during land disturbing,demolition and construction activities. To prevent surface and air movement of dust from exposed soil surfaces and reduce the presence of airborne substances which may present health hazards, traffic safety problems or harm animal or plant life. PERMANENT STABILIZATION All areas disturbed by construction will be stabilized with permanent sodding, gravel or pavement immediately following finish-grading operations. All sod will be approved by the "Virginia Crop Improvement Association", Blacksburg Virginia. ANHOLD ASSOCIATES February 8, 2013 3 EROSION &SEDIMENT CONTROL NARRATIVE Church Campus Improvements Crozet United Methodist Church,Crozet Virginia Specification for fertilizer are FS 0-F-241C,Type 1 solid form;Grade A or B;recommended for grass,with one hundred (100) percent of the elements derived from organic sources of the following properties: a) Nitrogen 12.0% b) Phosphoric Acid 8.0% c) Soluble Potash 8.0% With at least fifty (50) percent of the nitrogen from a non-water soluble organic source. The following measures shall be incorporated during fertilization: a) Apply fertilizer at a rate of 1000 lbs/acre. b) Apply lime at a rate of 2000 lbs/acre. c) Apply additives after smooth raking of topsoil. d) Till fertilizer into upper two (2) inches of topsoil. e) Water as necessary to aid germination and dissipation of soil additives. STORMWATER RUNOFF CONSIDERATIONS Stormwater Water Management and BMP for the project are not required on-site. The Church shall make a pro-rata share payment for use of existing County SWM and BMP facilities. CALCULATIONS None required for proposed measures. MANAGEMENT STRATEGIES a) Construction will be sequenced so that grading operations can begin and end as quickly as possible. b) Use existing road as construction entrance. Mud and debris shall be removed from all construction vehicles and equipment before leaving the site. c) Install silt fence and curb inlet protection controls as a first step in grading per the plan. MAINTENANCE All erosion and sediment control measures must be maintained and repaired immediately to insure continued performance of their intended functions as stated in the latest edition of the Virginia Erosion&Sediment Control Handbook. In general,all erosion and sediment control measures will be checked daily and after each significant rainfall event. All seeded and sodded areas will be checked regularly to ensure that a good stand is maintained. Areas will be fertilized, reseeded,and re-sodded as required (See project specifications). DISPOSITION OF TEMPORARY MEASURES All temporary erosion and sediment control measures shall be removed within 30 days after final site stabilization is achieved or after the temporary measures are no longer needed unless otherwise authorized by the County Erosion Control Officer. Trapped sediment and other disturbed soil areas resulting from the disposition of temporary measures shall be permanently stabilized to prevent further erosion and sedimentation. ANHOLD ASSOCIATES February 8, 2013 4 NNW, N411.110e C rozet thiteietfioit Church 4z) yO gro- Douglas Forrester, Pastor Established 1856 tiV. 1156 Crozet Avenue P. 0. Box 70 Crozet, Virginia 22932 (434) 823-4420 go Email: office @crozetumc.org Webpage: www.crozetumc.org February 8, 2013 Mr. Glenn Brooks, Director of Engineering County of Albemarle Community Development Department 401 McIntire Road Charlottesville, VA 22902 Re: Crozet United Methodist Church 1156 Crozet Ave. Dear Mr. Brooks, Crozet United Methodist Church (CUMC) is excited to be submitting our plans for erosion and sediment control and stormwater management plan review. As you may know this project was necessitated by public action of VDOT and the County related to roadway and entrance improvements on both Jarman's Gap Road and Crozet Ave. The church property sits on the northwest corner of this intersection and is impacted by both projects. We are moving forward as directed by the County following a pre-application meeting in September 2011. This direction is outlined in an e-mail by William D. Fritz and is attached for reference. The site work described on the attached plans prepared by Anhold Associates, Greenwood, VA outlines the work required on our site in order to respond to the two public projects. CUMC is adhering to the scope of work referenced in the e-mail and is therefore not submitting a site plan for review or approval. CUMC desires to continue coordination and communication with the County on this project and other related Owner directed work that may occur parallel to the site plan activity. We are interested in meeting with you and other staff to review our plans and map out an appropriate strategy for ensuring that proper process is followed. We recommend that this coordination meeting occur at a regularly scheduled pre-application meeting and request that this be scheduled within the next few weeks. Please feel free to contact our CUMC representative and Project Manager, Mike Carmagnola at 434-422-0380 to arrange a meeting. Sincerely, -744 j-ivkAm) J. Douglas Forrester, Pastor Crozet United Methodist Church Gmail - Crozet United Method: church Page 1 of 1 Sew' "r4mon, lIIcs1 I I Mike Carmagnola< mjcarmagnola @gmail.com> Crozet United Methodist Church 1 message Bill Fritz< BFRITZ @albemarle.org> Mon, Sep 12, 2011 at 5:03 PM To: david anhold <danhold @hughes.net>, Mike Carmagnola <mjcarmagnola @gmail.com> This is a follow up of our meeting today. Your changes are to improve the existing parking and coordinate with the changes being made to your entrances by VDOT and the County. Because the entrance changes are occurring because of public action and are not the churches proposal I find no site plan is required. Also, you are not making changes to the site that increase the need for parking. The only changes you may be making to the building would be entrances or handicap access. These changes do not require a site plan. If the changes require a building permit and the work is visible from the entrance corridor district you will need approval from the Architectural Review Board. If the work requires a building permit and the work is not visible from the entrance corridor district you will not need approval from the Architectural Review Board. Sign permits are their own application and require review by the Architectural Review Board although in some cases this review is administrative. The changes to your parking will require an Erosion and Sediment Control Permit and approval of a Stormwater Management Plan. I hope that this information is helpful. If you have any questions please feel free to contact me. William D. Fritz, AICP Chief of Current Development 434-296-5832 ext. 3242 .....,.��,. ,,,...../.,..._:1/../n/0.,:-12,;1.—..n.1M411Al JP4.7;A.:r-n1-J17n—hfr41-7 JPrnc=tniPRicvar 7/7/71 1� . ��~ `�~� 7 ~\ i ~..,t,, :Ls..::‘,,‘_ ,..1 ) i I t . 1 ' I 1 IIIIIP ' 1111PF 110160481/M.4.WI' TOTAL•5091Crb•fir . ..i ir,,, ,_,.. , , „.„... . . .., 4,..„. .,„„„, , p, . - it , ._.. . , , : 1 „. c ri 1 41, . 4tiro_17,,,_54,4,0_, ,,., it, _iimilimussim., ...„...... : , ,,,_ _ _7., 4 **-T:.....:..'..,,I411 i 4111111m_,, __.,4211 ter gafftr aia. . I "1" : 1 -14*li 4-• alit* ' '''14 - 1 I r' 44111*9M11111V411111115..........—•••^ -4;,.- -htwillW jillik .~ ^ - ._ ��� _ /�_~� - -----�.—/ ` \ ____ - - � / �` `�~�� -~.�� FROEHLING ea ROBERTSON, INC. Boring Location Plan f•-8,p. Engineering Stability Since 1881 szoz Rockfish Gap Turnpike Client:Anho|dAssociates Project: Crozet United Me thodist Church Parking Lot Crozet,Virginia 22932'3330 F&R Project No. 71N-015IG T 434.823.5154 I F 434.823.4764 sauce Nom, Nr.s BORING LOG FROEHLING & ROBERTSON, INC. Boring: B-1 (1 of 1) 1881, Project No: 71N-0152 Elevation:690.5± Drilling Method: HSA Client:Anhold Associates Total Depth: 10.0' Hammer Type:Automatic Project:Crozet United Methodist Church Parking Lot Date Drilled: 11/15/11 City/State:Crozet,Virginia Boring Location:See Boring Location Plan Driller:C. Ellis Description of Materials *Sample Sample Depth N-Value Elevation Depth Remarks (Classification) Blows (feet) (blows/ft) Surficial Gravel 10-8-5 0• 690.0 - 0.5 ; 13 ;.; Dark Brown, Moist,Stiff,Gravelly Elastic SILT •;+ (MH),Some Sand,Some Organics • FILL 689.0 1.5 • Dark Brown, Moist,Very Stiff,Sandy Elastic Silt 6-8-9 1.5 _ (MH) 17 RESIDUUM 3.0 Subsurface water was not 687.0 - 3.5 - 3.5 encountered during Brown and Reddish Brown, Moist to Very Moist, 5-7-9 drilling or upon auger _ Very Stiff to Medium Stiff,Sandy SILT(ML) 16 removal RESIDUUM 5.0 Cave-in occured at 5.5 ft 3-5-9 6.0 — 14 7.5 2-3-5 8.5 8 680.5 10.0 10.0 Boring Terminated at 10 FT Z Z O 9 O O , *Number of blows required for a 140 lb hammer dropping 30"to drive 2"O.D.,1.375" I.D.sampler a total of 18 inches in three 6"increments. The sum of the second and third increments of penetration is termed the standard penetration resistance,N-Value. SINCE Sire BORING LOG FROEHLING at ROBERTSON, INC. Boring: B-2 (1 of 1) ,eat• Project No:71N-0152 Elevation:688± Drilling Method: HSA Client:Anhold Associates Total Depth: 10.0' Hammer Type:Automatic Project:Crozet United Methodist Church Parking Lot Date Drilled: 11/15/11 City/State:Crozet,Virginia Boring Location:See Boring Location Plan Driller:C. Ellis Elevation Depth Description of Materials *Sample Depth N-Value Remarks (Classification) Blows (feet (blows /ft) 'o Surficial Gravel 8-6-3 0 687.5 - 0.5 9 ;.; Dark Brown, Moist,Stiff, Elastic SILT(MH),Some • V Organics •;• FILL 686.5 - 1.5 • 1.5 V Dark Brown, Moist,Stiff,Sandy Elastic SILT 8-7-8 •.• (MH), 15 •;• FILL • •�� 3.0 Subsurface water was not 684.5 - 3.5 �• 3.5 encountered during Gray and Brown, Moist, Medium Dense,Silty 3-7-8 drilling or upon auger SAND(SM) 15 removal ALLUVIUM 5.0 • 682.0 6.0 Light Brown,Very Moist, Medium Dense,Silty 3-5-7 6'0 Cave-in occured at 6 ft - SAND(SM) 12 RESIDUUM • 7.5 679.5 8.5 Light Brown, Dark Brown,and Black,Very Moist, 3-3-5 8.5 - Medium Stiff,Sandy SILT(ML) 8 RESIDUUM 678.0 10.0 Boring Terminated at 10 FT 10.0 V1 Z Z O C7 9 Z z O m *Number of blows required for a 140 lb hammer dropping 30"to drive 2"O.D., 1.375" I.D.sampler a total of 18 inches in three 6"increments. The sum of the second and third increments of penetration is termed the standard penetration resistance, N-Value. t � 'woo'f F'ROEHLING Sc ROBERTSON, INC. BORING LOG Boring: B-3 (1 of 1) 1881 Project No: 71N-0152 Elevation:686± Drilling Method: HSA Client:Anhold Associates Total Depth: 10.0' Hammer Type:Automatic Project:Crozet United Methodist Church Parking Lot Date Drilled: 11/15/11 City/State:Crozet,Virginia Boring Location:See Boring Location Plan Driller:C. Ellis Description of Materials *Sample Sample Elevation Depth (Classification) Blows Depth(feet) (blows%ft) Remarks 685.8 - 0.2 ,•1 \Surficial Organic Soil �. 2-4-6 0. :: Dark Brown, Moist, Loose,Clayey SAND (SC), 10 Some Organics FILL 684.5 - 1.5 •A Light Brown,Very Moist, Medium Stiff,Sandy 3-3-4 1.5 •:*• Lean CLAY(CL) 7 .•4 FILL 3.0 Subsurface water was 682.5 3.5 encountered during Light Brown and Brown,Very Moist, Loose, 1-4-2 3'S drilling at 6.5 ft Clayey SAND(SC) 6 • ALLUVIUM • 5.0 Cave-in occured at 5 ft 680.0 6.0 Brown,Very Moist to Wet, Medium Stiff,Sandy woh-2-4 6.0 _ SILT(ML) 6 RESIDUUM — 7.5 1-2-5 8.5 7 676.0 - 10.0 10.0 Boring Terminated at 10 FT O z 2 0 Z O 0 9 0 z O *Number of blows required for a 140 lb hammer dropping 30"to drive 2"O.D.,1.375"I.D.sampler a total of 18 inches in three 6" increments. The sum of the second and third increments of penetration is termed the standard penetration resistance,N-Value. SINCE 'Nee 'NNW" V • BORING LOG f FROEHLING Sc ROBERTSON, INC. Boring: B-4 (1 of 1) 1881" Project No: 71N-0152 Elevation:680± Drilling Method: HSA Client:Anhold Associates Total Depth: 10.0' Hammer Type:Automatic Project: Crozet United Methodist Church Parking Lot Date Drilled: 11/15/11 City/State:Crozet,Virginia Boring Location:See Boring Location Plan Driller:C. Ellis Elevation Depth Description of Materials *Sample Sample N-Value p (Classification) Blows Depth (blows/ft) Remarks (feet 679.8 - 0.2 = Surficial Organic Soil r 3-3-4 0 ;. Dark Brown, Moist, Medium Stiff,Sandy Elastic 7 �.� SILT(MH),Some Organics • FILL 678.5 - 1.5 ,'J 1.5 // Light Brown and Gray,Very Moist, Medium Stiff, 2-2-3 Sandy Lean CLAY(CL) 5 ALLUVIUM 3.0 Subsurface water was 676.5 - 3.5 `: 3.5 encountered during Light Brown and Gray,Very Moist to Wet, 1-2-3 drilling at 9 ft _ Medium Stiff to Soft,Sandy SILT(ML),Trace Clay 5 RESIDUUM 5.0 Cave-in occured at 5 ft 2-1-3 6.0 4 — 7.5 671.5 - 8.5 3611 8.5 Dark Brown and Black, Moist, Medium Dense, Silty SAND (SM) 17 RESIDUUM 670.0 - 10.0 10.0 Boring Terminated at 10 FT O 2 2 2 Z 9 9 l7 O m *Number of blows required for a 140 lb hammer dropping 30"to drive 2"O.D., 1.375" I.D.sampler a total of 18 inches in three 6"increments. The sum of the second and third increments of penetration is termed the standard penetration resistance,N-Value.