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Home My WebLink About20190167 Ver 1_More Info Received rev 20190329_20190329Camp Branch Creek Stabilization DWR# 20190167 Village of Cheshire HOA, Black Mountain, NC 28711 LOCATION: The Camp Branch stream is located in Black Mountain, NC. The Village of Cheshire is a neighborhood located within the Town of Black Mountain and the stream passes through the neighborhood between Lakey Gap Road and NC Highway 9. There are four sites of significant erosion along the stream in this neighborhood. Satellite image displayed below. IMPACT TABLE: The following impact table summarizes the proposed restoration work and length of each site. Impact # Type of Impact Stream Stream Latitude Longitude Width Length Name Type (If) (If) S1 Point bar stone Camp Perennial 35.603220 -82.317210 10-20' 95' removal, fill and Branch sloping, stone toe, Riparian seeding, straw, Coir matt, replanting per NC State "Back Yard Stream Repair Guide" S2 Sloping, Riparian Camp Perennial 35.603610 -82.315930 10-15' 40' seeding, straw, Coir Branch matt, replanting per NC State "Back Yard Stream Repair Guide" S3 Point bar stone Camp Perennial 35.603520 -82.314510 10-15' 80' removal, fill and Branch sloping, Riparian seeding, straw, Coir matt, replanting per NC State "Back Yard Stream Repair Guide" S4 Sloping, Riparian Camp Perennial 35.603600 -82.314000 10-15' 165' seeding, straw, Coir Branch matt, replanting per NC State "Back Yard Stream Repair Guide" Total (If) 380' INDIVIDUAL SITE DETAILS: Site 1: This is the most westerly site along the stream course with significant erosion. 20 feet to the south lies Cheshire Drive which is a town street maintained by the Town of Black Mountain. The stream bank has been eroding towards this street and we feel corrective action must be taken to prevent damage to this roadway and the adjacent Sycamore trees. The height of the bank in proximity to the street is approximately four feet in height. The bank height decreases as one looks upstream and downstream and on the opposite side of the stream. s� T y _ cis. � ��o��0� J f - I :�sa Site #1 looking West Site #1 Looking East W -m -lo cy-,.:4y i, 6 6 (' Coi r h �( a Sib M,17'7.I'A)rr C V-,47,1' b'AC�,g't� 5�7 R64,02V If sz r,z- / The proposed plan is to remove some of the point bar stone, grading the eroded banks to a more stable slope of 3:1 to 2:1, partially fill the washed-out base of the bank, reinforce the steeper bank, (towards the roadway), with large rock and sow riparian seed mix which will be covered with straw. Coir matting would be secured to the exposed bank with stakes. The bank will be replanted with native woody vegetation per the Back -Yard Stream Repair Guide published by NC State. This may be supplemented with live stakes during the dormant season, however the major portion of this project is anticipated to occur during the growing season so live stakes will not be used at that time. Site 2: This site is located in the park area of the neighborhood. Since the erosion is progressing, we feel stream bank stabilization is warranted in this area as well. Site #2 looking East Site #2 Looking West RzPw-1,44 -S-4,'o 4t� .rAc v Ajo& S.rr4, The proposed plan is grading the eroded banks to a more stable slope of 3:1 to 2:1, sow riparian seed mix which will be covered with straw. Coir matting would be secured to the exposed bank with stakes. The bank will be replanted with native woody vegetation per the Back-Yard Stream Repair Guide published by NC State. This may be supplemented with live stakes during the dormant season, however the major portion of this project is anticipated to occur during the growing season so live stakes are not a viable option during that time period. Site 3: This site is located immediately east of Browning Road. The erosion in this area has progressed to where one of the walking paths has been washed away. While still on HOA property, the erosion is encroaching upon private property. The stream bank is undercut significantly and there is a large amount of point bar stone which has accumulated. Site #3 looking East Site #3 looking West C,01- cad , ad A * ,qzti S'arc s To ,fir V.' �W Pic `5'z-7'yup 4e -b kyl it A4Uf- L dti' TCAJ?�f VV 6,&Z SSEFo %AeA1,5�0) ,'� oo,l6,�'-� W/ ,,jT-WZ6) `5'z-7'yup The plan is removal of excess point bar stone, filling in the undercut portion of the bank, grading the banks to a more stable slope of 3:1 to 2:1 and sowing Riparian seed mix which will be covered with straw. Coir matting would be secured to the exposed soil with stakes. The bank will be replanted with native woody vegetation per the Back-Yard Stream Repair Guide published by NC State. This may be supplemented with live stakes during the dormant season, however the major portion of this project is anticipated to occur during the growing season so live stakes are not a viable option at that time. Site 4: This site is the most easterly located area adjacent to the playground. We have experienced the most significant erosion in this area although there are no threatened structures. Due to the heavy rains of the last two years, a significant amount of bank erosion has occurred. Site #4 near footbridge '"M"v..i Site #4 looking East Site #4 Looking West X44 i�0.xa Site #4 looking East Site #4 Looking West CQArP[RNali %d ,4,r S7V SIW �,Pz�.v�1.�u� ,� ecrr, ,�'� 4,1j s% 9 The plan is grading the eroded banks to a more stable slope of 3:1 to 2:1 and sow riparian seed mix which will be covered with straw. Coir matting would be secured to the exposed soil with stakes. The bank will be replanted with native woody vegetation per the Back -Yard Stream Repair Guide published by NC State. This may be supplemented with live stakes during the dormant season, however the major portion of this project is anticipated to occur during the growing season so live stakes are not a viable option during that time period. STREAM RELOCATION OR REALIGNMENT: We will be working within the original steam bed at all sites. We plan no significant stream relocation or realignment.