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Home My WebLink About20151080 Ver 1_B-4948 application revisions & additional info_20151104C. Proposed Impacts Inventory 1. Impacts Summary 1a. Which sections were completed below for your project (check all that apply): � Wetlands ❑ Streams - tributaries Buffers � Open Waters ❑ Pond Construction 2. Wetland Impacts If there are wetland impacts proposed on the site, then complete this question for each wetland area impacted. 2a. 2b. 2c. 2d. 2e. 2f. Wetland impact Type of jurisdiction number — Type of impact Type of wetland Forested (Corps - 404, 10 Area of impact Permanent (P) or (if known) DWQ — non-404, other) (acres) Tem orar T Site 1� P � T Roadway fill Riverine � Yes � Corps 0.07 ❑ No � DWQ Site 1❑ P❑ T ❑ Yes ❑ Corps ❑ No ❑ DWQ 2g. Total wetland impacts 0.07 Permanent 0.00 Temporary 2h. Comments: - There will also be 0.10 acre of hand clearing. Additionally, there will be 0.02 acre of temporary fill in wetlands in the hand clearing areas for the installation of erosion control measures, including temporary silt fence and/or special sediment control fence. 3. Stream Impacts If there are perennial or intermittent stream impacts (including temporary impacts) proposed on the site, then complete this question for all stream sites impacted. 3a. 3b. 3c. 3d. 3e. 3f. 3g. Stream impact Type of impact Stream name Perennial Type of Average Impact length number - (PER) or jurisdiction stream (linear feet) Permanent (P) or intermittent (Corps - 404, 10 width Temporary (T) (INT)? DWQ — non-404, (feet) other) Site 1❑ P� T Bank Soules Swamp � PER � Corps 71 Stabilization ❑ INT � DWQ Site 2❑ P � T ❑ PER ❑ Corps ❑ INT ❑ DWQ Site 3❑ P � T ❑ PER ❑ Corps ❑ INT ❑ DWQ Site 4❑ P � T ❑ PER ❑ Corps ❑ INT ❑ DWQ 3h. Total stream and tributary impacts 71 3i. Comments: 4. Open Water Impacts If there are proposed impacts to lakes, ponds, estuaries, tributaries, sounds, the Atlantic Ocean, or any other open water of the U.S. then individuall list all o en water im acts below. 4a. 4b. 4c. 4d. 4e. Open water Name of impact number— waterbody Type of impact Waterbody type Area of impact (acres) Permanent (P) or (if applicable) Temporary T 01 � P 0 T Soules Swamp Bank Stabilization Stream 0.02 01 ❑P�T 02 ❑POT 03 ❑P❑T 4f. Total open water impacts 0.02 permanent 4g. Comments: 5. Pond or Lake Construction If pond or lake construction roposed, then complete the chart below. 5a. 5b. 5c. 5d. 5e. Wetland Impacts (acres) Stream Impacts (feet) Upland Pond ID Proposed use or (acres) number purpose of pond Excavat Flooded Filled ed Flooded Filled Excavated Flooded P1 P2 5f. Total 5g. Comments: 5h. Is a dam high hazard permit required? ❑ Yes ❑ No If yes, permit ID no: 5i. Expected pond surface area (acres): 5j. Size of pond watershed (acres): 5k. Method of construction: � � c L" (6 .� i� � � � � � y"� L N Z � 0 � � � � � � � U � � � � � ,u� N Q � � I� I� Q W U � ~ � � — .� � � W `� � a� � a� � c c c� c Q:� c�o n�� ° � W U � a� w d U � � � �� a�� `� � � `. � a� .� � U � N N � � (� � � O O Q N '- � a � � � � � � � •L (�0 V O O U =� � � � N ' � � O O Q U � a � � � N � � ~ � L � U � � � � � W � � U � � a U � •- � d o `� a Q � � c�o i �p U.� � c� � Q W � J � W N � � � � � U � — � �� = c� � o 0 �� `-o 0 a� � d Z J O J Q a� Q � N � � � � �� a m � in "- °a c~n i� � z Q m pp O O � + + � � �p O � O � � � O � (n � M � O � � � � �' � O Q � Z T �--� � � � U (B Q � (B � U (6 O � (a � O .�. � � � � � W � � � O � z Herndon, Mason From: Merritt, John S Sent: Wednesday, November 04, 2015 10:08 AM To: Herndon, Mason Cc: Rivenbark, Chris Subject: FW: B-4948 Attachments: B-4792 Stream Dimensions.pdf Mason, please see below for Hydos response to your comments. Thanks for your help. John From: Rivers, Vincent N Sent: Wednesday, November 04, 2015 10:04 AM To: Merritt, John S Subject: RE: B-4948 John, A low water bridge is sometimes described as a bridge with very little clearance between the bridge's substructure and the water surface elevation at the crossing. That is how I described it in this case given the onsite conditions. Officially, the term Low Water bridge describes a bridge that can be overtopped by a 2 or S year storm event. I mentioned "low water" bridge in this case because normal flows are extremely close to the bridge substructure. Being a low water bridge does not dictate scour protection. As I stated in earlier email, riprap reinforcement is needed for scour protection at the vertical abutments. This crossing is at a swamp, and the riprap will be underwater because of that reason. The excavation could possibly be raised some but, it would still have to be rip rap protection. Because this is a swamp/ stream system maintaining an exact bank dimension is somewhat of an art form because the top of bank and water's edge are so close to being the same location. In the attached PDF(red indicates water's edge, magenta indicates top of bank) it appears that the existing bridge constricts the stream somewhat and we think the new bridge(which is a longer structure) is better suited to the upstream and downstream channel dimensions (see bank and water's edge sketch in second exhibit) and therefore the stream dimension will not adversely change. The stream profile remains unchanged, and from the photographs is practically a flat grade and with very slow moving water. -Vincent From: Merritt, John S Sent: Tuesday, November 03, 2015 2:01 PM To: Rivers, Vincent N Cc: Rivenbark, Chris Subject: RE: B-4948 Vincent, A few more questions. What does Vincent mean by low water bridge? I'm not familiar with that term and why that would dictate scour protection. In looking at the BSR, the proposed excavation is approximately 1 ft below the lowest elevation of the adjacent natural ground (adjacent floodplain) and 2 ft below the water elevation taken on 3/13/14 which should be close to OHM. DWR has concerns that the excavation as proposed will be widening the stream channel which is in conflict of our permit conditions. Can the proposed excavation be raised to match the OHM and/or typical floodplain elevation? In other words, I need to know how DOT is going to comply with our permit condition that stream dimensions and profile is going to be maintained through the project area. Thanks for your help, John From: Rivers, Vincent N Sent: Monday, November OZ, 2015 8:47 AM To: Rivenbark, Chris Cc: Merritt, John S Subject: RE: B-4948 Chris, The riprap at this crossing is needed for scour protection at the vertical abutments. Since this is a low water bridge, the riprap will be below the OHW. I've attached a view for reference that could help to clarify. We are actually lengthening the proposed bridge approximately 25 feet. The design velocity in the channel of the crossing is 3.1 ft/s. Thanks, Vincent From: Rivenbark, Chris Sent: Wednesday, October 28, 2015 7:54 AM To: Rivers, Vincent N Cc: Merritt, John S Subject: RE: B-4948 Vincent Can you help us with the question below from DWR? If the rip rap is going to extend beyond the OHM and be a permanent impact, why was the bridge not lengthened to avoid this impact? It does not appear that velocities at this crossing are erosive and causing bank instability based on historical photos. Chris Rivenbark NCDOT-Natural Environment Section (919) 707-6152 From: Rivers, Vincent N Sent: Wednesday, July 08, 2015 2:37 PM To: Merritt, John S Cc: Rivenbark, Chris Subject: RE: B-4948 John, I've attached the revised set of permit drawings for B-4948. Thanks, Vincent From: Merritt, John S Sent: Thursday, July 02, 2015 11:58 AM To: Rivers, Vincent N Subject: RE: B-4948 Yes please. From: Rivers, Vincent N Sent: Thursday, July 02, 2015 9:54 AM To: Merritt, John S Subject: RE: B-4948 Thanks John. So, we should show hand clearing in the areas that we are now showing mechanized clearing, correct? From: Merritt, John S Sent: Tuesday, June 30, 2015 5:30 PM To: Rivers, Vincent N Subject: B-4948 Vincent, The division has finally gotten back to us and they are ok with us doing hand clearing. Thanks for your help and let me know if you have any questions. John Email correspondence to and from this sender is subject to the N.C. Public Records Law and may be disclosed to third parties. � - --'- ' . 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