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Home My WebLink About20090044 Ver 1_Triage Comments_20090210DWQ# Triaged By: Reviewer 1 Reviewer 2 Reviewer 3 Use this form instead of writing inside the folder Triage Comment Sheet v ? Issue Project (Reviewer 1) ? Issue ith conditions (R iewer 1) ? Issue with conditions (Reviewer 2) ? More Information (Reviewer 1) ? Return Application (Reviewer 1) ? Send to Regions (Reviewer 1) ? Send to Regions (Reviewer 2) Date: I _ \ l Date: Date: Issue Project (Reviewer 2) More Information (Reviewer 2) ? Return Application (Reviewer 2) SATriage Forms\Triage Issue Sheet.doc PLEASE PRINT CLEARLY Version 1.4 January 9, 2009 401 Oversight/Express Permitting PCN Submittal Checklist ? The application fee (Checks may be made out to "N.C. Division of Water Quality" - $240.00 for 401 Water Quality Certification with minor impacts - $570.00 for 401 Water Quality Certification with major impacts - Express Review Fee (Amount requested on Acceptance Letter) ? Five (5) complete and collated copies of the PCN Application and supporting documentation (instead of providing 5 copies of the full size plans you may provide two copies of full size plans along with three copies of 11 X 17 plans) ? Stormwater Management Plan (if applicable - see PCN Form Help File Section E) 1) Please provide three (3) copies of the stormwater management plans along with all supporting information pertaining to this project including the following: a. Entire site development/layout plans delineating all drainage areas; b. Design calculation sheets for all proposed BMPs) sized for both on-site and off-site drainage; c. BMP supplements for each proposed BMP and Required Items Check List (http://h2o.enr.state.nc.us/su/bmp forms.htm) along with all required items; d. A Notarized Operation & Maintenance Agreement for each stormwater management facility; e. Detailed construction drawing sheets shall include (i) Erosion and sediment control plans; (ii) Installation and planting schedules for the proposed BMPs; (iii) Appropriately scaled plan views and cross sectional details of all BMPs and associated components - inlet and outlet structures, forebay, respective zones and pertinent elevations. ? If your project is located within a State implemented Riparian Buffer Rule Area, submit the following along with site plans and PCN form: 1) Three (3) copies of the details for on-site diffuse flow provisions, (refer to http://h2o.enr.state. nc. us/su/bmp_forms. htm). ? DWQ Stream Determination Forms for streams on property and DWQ determination letter for wetlands or streams (if applicable). The following is the most critical of all the information that you must provide. The quality and detail of the information will often determine the expeditiousness of the review. The following is a checklist of the types of pertinent information required at a minimum: Maps and Plans: ? The most recent version of the 1:24,000 USGS Topographic Map - Please cleanly draw or delineate the site boundaries on the topographic map. ? The most recent version of the bound and published County NRCS Soil Survey Map - (required for projects within the Neuse River Basin, Tar-Pamlico River Basin, Randleman Lake Watershed and the Catawba River Basin, also recommended for all projects) - Please clearly delineate the site boundaries, etc. on the map. If the delineation obscures any of the features, it is recommended that a clean copy be provided. Copies of the Version 1.4 January 9, 2009 current soil survey and/or soil survey map sheets can be obtained from the local NRCS County Office (http://www.nc.nres.usda.gov/). GIS soil layers are not acceptable. ? Vicinity map - Please clearly mark the location and approximate boundaries of the property and project on the map. Please indicate north arrow and scale. Please include applicable road names or State Road numbers. ? The Site Plan - The most critical map to be provided is the site plan. You must provide full sized plans. The following is the minimum list of plans that are typically needed. ? Pre-construction/Pre-existing conditions - This sheet (or sheets) must include: • All jurisdictional and non-jurisdictional wetland, stream, water features, State regulated buffers (delineated into Zones 1 and 2) • Topographic contours with elevations • Any existing structures and impervious areas • Existing utility lines and easements • Existing roads, culverts, and other pertinent features • North arrow and the scale (1":50' scale is recommended). ? Proposed conditions - This sheet (or sheets) must include: • All jurisdictional and non-jurisdictional wetland, stream, water features, State regulated buffers (delineated into Zones 1 and 2) • Lot layout (if a subdivision or commercial development is proposed) - lots must be developable without further impacts to jurisdictional and non-jurisdictional wetlands, streams water features, and State regulated buffers. Building envelopes must be provided when streams, wetlands, riparian buffers, or water features exist on a lot • All built-out structures and impervious cover • Final grading contours with elevations • All utilities and easements (including septic fields on all lots within 100 feet of stream, wetland, or water features - if applicable) • Impacted areas - these should correspond with the Impact numbers listed on your PCN form. ? Drainage Plans - Final drainage plans must include the following: • Locations and pertinent elevations and sizes of the stormwater collection system and drainage ways • All inlets and outlets must also be shown with pertinent elevations (All outlets to wetlands must be at a non-erosive velocity, generally less than 2 ft/sec during the peak flow from the 10-yr storm) • Scaled stormwater BMPs must also be indicated as required by DWQ rules and policies • In certain cases (see Section E of PCN form), final stormwater management plans must also be provided (see Stormwater Management Plan Checklist) Proposed Impacts - All impacts to jurisdictional and non-jurisdictional wetland, stream, "'?Awater features, and State regulated buffers must be shown and labeled on the site plans at a scale no smaller than 1" = 50'. All excavation, fill, flooding, stabilization, and other impacts that will be conducted in or near jurisdictional and non-jurisdictional wetland, stream, water features, and State regulated buffers must be indicated. Please provide cross sectional details showing the provisions for aquatic life passage (burial of culvert 20% for culverts s 48 inches, and 1-foot for culverts > 48 inches). r Sl ,? &CO 5 ? - ? -??-? " Version 1.4 January 9, 2009 Wetland Impacts: ? Precise grading and final elevation contours must be provided. Existing vegetation and any clearing must be specified. ? All subsurface utility lines must indicate the location of anti-seep collars. Construction detail for anti-seep collars must be provided. ? Roadway or other crossings of riparian wetlands may require floodway culverts to maintain existing hydrological conditions. ? Plans should show that the hydrology of remaining wetlands on the site will be maintained. Stream Impacts: ? Stream impacts must be clearly shown on the plans. The centerline as well as the banks of the stream must be surveyed or located by GPS for the portion of the stream to be impacted. ? The inlet and the outlet of all culverts should be aligned with the stream as much as possible. Inlet and outlet elevations and streambed elevations should be indicated. Any inlet or outlet protection must be shown and enumerated on the impact map(s). ? For bottomless culverts or other spans, a vertical cross section should be provided that shows the minimum distance from each span to each stream bank, the stream cross section, the height of the span above the stream and the minimum distance from the edge of each footer to each stream bank. Additionally, please provide a signed and sealed geotechnical report of subsurface soils at the proposed bottomless culvert location. The report must comply with the Division of Highways - Guidelines for Drainage Studies and Hydraulic Design, prepared by A.L. Hankins, Jr., State Hydraulics Engineer - 1999. ? Multiple culverts or sectioned box culverts typically require the use of sills, off- setting or other means to match the cross section of the existing stream (in order to maintain stream stability and provide aquatic life passage). A vertical cross section of the culverts should be shown overlain with the up and downstream stream cross section including the stream flood-prone area. ? Impacts associated with dam construction must indicate and enumerate all fill associated with the dam footprint, spillway and any bank stream bank stabilization. The length of stream impounded must also be indicated and enumerated. 09-0044 Woodford Manor AML comments February 10, 2009 RETURN. 1) Mr. Larry Vaughn, RLA met with Ms. Annette Lucas, PE of the DWQ 401 Oversight/Express Unit on December 11, 2008 to discuss the diffuse flow requirements for this project. Ms. Lucas explained the design and submittal requirements associated with the state's diffuse flow requirements in detail. 2) The submittal received on January 9, 2009 includes two Bioretention Cell Supplement Forms. Mr. Vaughn initialed that he included all required items associated with the proposed bioretention cells, including: a) Plans (1" - 50' or larger) of the entire site showing: - Delineated drainage basins (include Rational C coefficient per basin), - Cell dimensions, - Pretreatment system, - High flow bypass system, - Maintenance access, - Recorded drainage easement and public right of way (ROW), - Clean out pipe locations, - Overflow device, and - Boundaries of drainage easement. b) Plan details (1" = 30' or larger) for the bioretention cell showing: - Cell dimensions - Pretreatment system, - High flow bypass system, - Maintenance access, - Recorded drainage easement and public right of way (ROW), - Design at ultimate build-out, - Off-site drainage (if applicable), - Clean out pipe locations, - Overflow device, and - Boundaries of drainage easement. c) Section view of the bioretention cell (1" = 20' or larger) showing: - Side slopes, 3:1 or lower - Underdrain system (if applicable), and - Bioretention cell layers d) A soils report. e) A planting plan. f) A construction sequence. g) The supporting calculations. NONE of these items have been provided. 3) The information provided about the level spreaders was also grossly inadequate. The submittal did not include a Level Spreader Supplement Form for each level spreader. Instead, one partially completely form was provided to collectively cover the numerous level spreaders proposed on this site. Mr. Vaughn initialed that he had provided the following items: a) Plans (1" - 50' or larger) of the entire site showing: - Design at ultimate build-out, - Off-site drainage (if applicable), - Delineated drainage basins (include Rational C coefficient per basin), - Forebay (if applicable), - High flow bypass system, - Maintenance access, - Proposed drainage easement and public right of way (ROW), and - Boundaries of drainage easement. b) Plan details (1" = 30' or larger) for the level spreader showing: - Forebay (if applicable), - High flow bypass system, - One foot topo lines between the level lip and top of stream bank, - Proposed drainage easement, and - Design at ultimate build-out. c) A construction sequence that shows how the level spreader will be protected from sediment until the entire drainage area is stabilized. NONE of the above items have been provided. 4) The DWQ cannot conduct a review of this project until correct and complete information is provided as requested.