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HomeMy WebLinkAbout20150703 Ver 2_PN Request for Additional Information_20200610Strickland, Bev From: Jon Swaim <jon.swaim@mcgillassociates.com> Sent: Wednesday, June 10, 2020 2:59 PM To: Greer, Emily C CIV USARMY CESAW (USA); Kleinmaier, Brad Cc: Turlington, Chad; Wojoski, Paul A; Dori Sabeh Subject: [External] RE: AID# SAW-2015-02060 Rhodes Pond Dam Public Notice Request for Additional Information Attachments: Block 25. Adjoining Property Owners.xlsx; Rhodes Pond IP - Response to Comments - 061020.pdf I email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to nc. ov Emily, Please find the attached information you requested for the referenced project. I also replied to your requests below for quick reference. I can be reached anytime if you need any additional details on the proposed improvements. Chad, I spoke to Sue Homewood regarding submittal of the application to NCDWR and she requested that I wait until the public notice was completed before sending it in. Is that still the course of action or would DWR like me to officially submit? Thank you, % -- 0 "i��t owglll� ull" lilll1 Jon Swaim Project Manager McGill Associates, P.A. 1013 State Farm Road, Boone, NC 28607 T 828.386.1920 C 828.434.0951 jon.swaim@mcgillassociates.corr mcgillassociates.com [mcgillassociates.coml From: Greer, Emily C CIV USARMY CESAW (USA) <Emily.C.Greer@usace.army.mil> Sent: Saturday, June 06, 2020 9:30 PM To: Jon Swaim <jon.swaim@mcgillassociates.com>; Kleinmaier, Brad<brad.kleinmaier@ncwildlife.org> Cc: Turlington, Chad <chad.turlington@ncdenr.gov>; Wojoski, Paul A <Paul.Wojoski@ncdenr.gov> Subject: AID# SAW-2015-02060 Rhodes Pond Dam Public Notice Request for Additional Information Jon - The following information is needed to complete the review for issuance of a Public Notice for the above referenced project. Please provide the following information within 30 days from the date of this request or request an extension of this deadline. Otherwise, the application will be automatically withdrawn. For tracking purposes, the project AID# should be provided in the subject line of all correspondence related to this project. 1. Project drawings are required to be in 11x17" to scale format. Please resubmit the drawings that are attached to this email in the correct format and change the figure number of the overall impact map. See attached. 2. Impacts associated with S1 are unclear. A rough estimate shows this area to be approximately 0.27-acre of open water that was included as a permanent impact. It is unclear where the stream is located and how stream impacts were determined. Please provide a written clarification of the impacts, define the separate impact areas and/or aquatic resources more clearly on the impact maps, and update impact amounts, as appropriate. See attached. 3. What is the footprint of the existing structure in acreage? 0.010-acres. 4. Flooding of aquatic resources as a result of impoundment is a regulated impact. All tributaries and wetlands that have reestablished or otherwise converted since the dam failure and that will be affected by the impoundment should be accounted as a "conversion of waters" impact. Those portions of aquatic resources whose hydrology will be restored upon project completion should be included in impact totals but also separated and discussed as part of the mitigation discussion. An assessment of the impacted aquatic resources can be conducted utilizing available desktop data (include as supplemental data to the application), through a site assessment (spot delineation, visual observation), or a combination. Please confirm that the attached aerial accurately represents the extent of the affected area upon project completion and provide corrected impact totals. See attached. 5. Please provide the area of acreage within the project limits as depicted on the overall impact map, the lakebed, and the total affected area as depicted on the attached aerial. 278.5-acres, see attached maps. 6. What is the historical pond elevation? 131-feet. 7. Please provide a discussion of the existing site conditions, including a description of the site's ecology. See attached. 8. Please complete and return the attached spreadsheet. See attached. 9. If the applicant has not submitted the application to NCDENR-DWR, please submit a copy of the application along with the response to these comments to the agency. NCDWR requested that I wait until the public notice had been received. The above comments only pertain to information needed to issue the Public Notice and do not address deficiencies of the application that are pertinent to the permit review. After the Public Notice has been issued, the Corps may determine that a meeting to discuss these deficiencies with the applicant and any other interested agency is warranted. It is strongly recommended that the applicant review the Freedom of Information Act documents previously provided by the Corps for guidance on the type and level of information and documentation needed for the Public Notice and subsequent permit review. The Corps is available to discuss any questions you may have regarding the above comments. Thank you - Emily Greer, Regulatory Specialist Wilmington District - Wilmington Regulatory Field Office 69 Darlington Avenue, Wilmington, NC 28403 910.251.4567 (o) From: Jon Swaim<jon.swaim@mcgillassociates.com> Sent: Wednesday, June 3, 2020 11:15 AM To: Greer, Emily C CIV USARMY CESAW (USA) <Emily.C.Greer@usace.army.mil> Subject: [Non-DoD Source] FW: Rhodes Pond Hi Emily, Sorry to bug you. WRC asked if they could get an update on the Rhodes Pond IP. Is it moving forward as expected? Thanks, Jon Swaim Project Manager McGill Associates, P.A. 1013 State Farm Road, Boone, NC 28607 T 828.386.1920 C 828.434.0951 ion.swaim(camcgillassociates.com mcgillassociates.com We launched a refreshed brand. Please note email / web address changes above. From: Jon Swaim Sent: Friday, May 29, 2020 10:21 AM To: Greer, Emily C CIV USARMY CESAW (U Subject: RE: Rhodes Pond Hi Emily, Checking in on the IP, is there anything else you need from us at this point? Thanks, Jon Swaim Project Manager McGill Associates, P.A. 1013 State Farm Road, Boone, NC 28607 T 828.386.1920 C 828.434.0951 ion.swaim(camcaillassociates.com mcgillassociates.com From: Greer, Emily C CIV USARMY CESAW (USA) <Emily.C.Greer@usace.army.mil> Sent: Tuesday, May 19, 2020 9:14 PM To: Jon Swaim<jon.swaim@mcgillassociates.com> Subject: RE: Rhodes Pond I just want to confirm that you are making a formal submittal? We talked about stepping into this a little smoother, so I just want to make sure since I have deadlines to meet if this is a formal request. From: Jon Swaim<ion.swaim@mcgillassociates.com> Sent: Tuesday, May 19, 2020 2:42 PM To: Greer, Emily C CIV USARMY CESAW (USA) <Emily.C.Greer@usace.army.mil> Subject: [Non-DoD Source] Rhodes Pond Emily, Please find the attached photo sheets and photo location map for the Rhodes Pond Individual Permit application. Let me know if you need any additional information. Thanks, 01 �.11ll �Ilm �I Jon Swaim Project Manager McGill Associates, P.A. 1013 State Farm Road, Boone, NC 28607 T 828.386.1920 C 828.434.0951 ion.swaima_mcgillassociates.com mcgillassociates.com BLOCK 18. NATURE OF ACTIVITY Existine Site Conditions Rhodes Pond (pond or reservoir) and its dam have existed in some form since the year 1770 and provides approximately 120 acres of open surface water for recreational use as documented in the North Carolina Department of Environmental Quality (NC DEQ) Division of Energy, Minerals and Land Resources (DEMLR) Dam Safety Program (NC Dam Safety). Rhodes Pond Dam maintained a normal pool elevation of 131 feet. During Tropical Storm Andrea (June 2013), Rhodes Pond Dam suffered damage due to overtopping and the dam was reclassified from intermediate hazard to High Hazard by NC Dam Safety. McGill Associates, P.A. (McGill) designed and permitted repairs and overtopping protection for the dam to withstand a 100-year flow event (NC Dam Safety's requirement for high hazard dams) essentially within the existing footprint. The existing spillway remained intact at this time. During Hurricane Matthew in October 2016, while construction of the repairs was ongoing and scheduled to be completed in December 2016, the dam was overtopped resulting in breaches on both sides of the spillway and soil loss/void space development under the foundation of the small spillway and around its endwalls. For reference, Hurricane Matthew's total rainfall within Rhodes Pond Dam's drainage basin was estimated to be as high as 15 inches while the 100-year, 48-hour design storm is approximately 10 inches. NC Dam Safety officials directed McGill and WRC that the spillway must be replaced based on a design to accommodate current design standard of% Probable Maximum Precipitation (PMP). Since the 2016 failure, the original 278.5-acre lake bed has remained mostly drained. The Rocky River and an unnamed tributary (UT) to the Rocky River have begun to channelize within the pond bed and reestablish natural flow. Approximately 8,800 linear feet of the Rocky River and 1,971 linear feet of the UT -Rocky River were delineated utilizing desktop data and field observations. Two large pooled/open water areas totaling approximately 8.9-acres exist on the left and right sides of the channel flow and existing inner berm/walking path. Scrub/shrub/herbaceous (approx. 66.5-acres) and emergent/marsh vegetation (approx. 26.8-acres) have established throughout the original pool area forming wetlands. Large areas of mature forested wetland areas totaling approximately 169.3-acres dominate the original pond bed especially to the north where historic pond levels seasonally fluctuated. Woody shoreline vegetation consists of black willow (Salix nigra), shortleaf pine (Pinus echinata), loblolly pine (Pinus taeda), red maple (Acer rubrum), sweetgum (Liquidambar styraciflua), wax myrtle (Myrica Cerifera), river birch (eetula nigra) and Chinese privet (Ligustrum sinense). Bald cypress (Taxodium distichum) dominated the forested wetland areas and shallow river edges throughout the pond. Predominant herbaceous vegetation consists of a mix of sedges, rushes, woolgrass (Scirpus cyperinus) and native emergent species such as American white waterlily (Nymphaea adarata) and American eelgrass (Vallisneria Americana). Project Description A labyrinth weir system (spillway) is proposed to replace the existing Rhodes Pond dam which was breached during Hurricane Matthew in October 2016. NC Dam Safety officials directed McGill and NCWRC that the spillway must be redesigned to accommodate flows from a more extreme rainfall event. An Incremental Hazard Evaluation (IHE) of the dam completed by McGill in February 2019 and approved by NC Dam Safety in March 2019 concluded that the appropriate design storm for the spillway Page 1 of 4 is the 500-year event and that the dam be constructed to pass the 500-year storm event without overtopping the embankment. The following dam repairs are proposed to meet the approved IHE goal of providing a spillway adequate for conveying the 500-year event without overtopping the earthen embankment: 1. Replace the main spillway with a labyrinth weir. 2. Replace the existing gates structure. 3. Restore/improve the eastern earthen embankments condition. 4. Remove trees less than 6-inch diameter within the clearing area. 5. Remove all trees within the grading limits. 6. Replace the small spillway with an earthen embankment and a riser structure and pipe. 7. Provide adequate hydraulic connection between Rhodes Pond and the downstream channels to maintain minimum flow and high flows to the channels via various uncontrolled conveyances. A 6-cycle labyrinth with an 8° wall angle and half -round weir crest was designed to replace the existing spillway and accommodate the 500-year event. The proposed main spillway repair/replacement will be placed at the location of the breach and embedded into the existing embankments. The upstream/downstream of the embankments will be aligned with riprap protection. Three 4 ft high by 4 ft wide control gates are currently located west of the main spillway. The gates were refurbished circa 2011 and are operational. Because the condition of the gates structure and foundation is unknown, the structure will be demolished and the gates will be reused as part of the proposed design, maintaining their invert elevations. The east embankment of the main spillway was significantly damaged as erosion occurred mainly at the downstream face of the embankment at several locations, but the embankment was not breached except immediately adjacent to the main spillway. The embankment will be restored/improved to original conditions and stabilized. Water from the pond is also conveyed through a small spillway located about 300 ft west of the southwest corner of the pond. Following hurricane Matthew, substantial soil loss occurred in the embankment behind the spillway's western endwall. The concrete apron downstream of the spillway was also dislodged, broken, and displaced further downstream into the channel. The small spillway, associated abutments and foundation elements, buried debris, old foundation, and unsuitable soils will be removed through the underlying sandy alluvial soils. An embankment fill will be placed at the location of the removed spillway. A riser structure will be placed on compacted soils near the toe of the embankment replacing the small spillway to maintain the flow connectivity between the pond and downstream channel. The existing access road from US 301 will be improved to allow for construction and permanent access. Large impervious diversion dikes and a pump around system will be installed to divert stream flow and allow for work to occur in the dry. See attached Engineering Drawings. It is anticipated that earthwork will typically involve excavators, bull dozers and dump trucks. It is anticipated that the majority of rip rap will be placed by machine (excavator) however some portions may require hand placement. Proposed improvements to the main dam and spillway will result in 0.50-acres of permanent and 0.49- acres of temporary impacts to open water, 75 If of permanent and 348 If of temporary impacts to the Rocky River, and 0.38-acres of temporary impacts to emergent/marsh wetlands. Flow diversion will be achieved by installing sheet piling and constructing an inner berm to allow for access and construction work to be completed in the dry resulting in the temporary impacts. The installation of the labyrinth weir, concrete spillway, embankment repair, and rip rap protection will result in the permanent impacts. Page 2 of 4 The restoration of the inner berm will result in approximately 0.23-acres of permanent open water impacts as fill will be placed, compacted, and stabilized to reestablish the berm and existing walking trail. Lastly, the proposed improvements to the small spillway will result in approximately 0.06-acres of permanent impacts to open water and 0.18 acres of temporary impacts to open water, and approximately 0.20-acres of temporary impacts to scrub shrub/herbaceous wetlands. Permanent impacts will be contributed to the new earthen spillway, riser structure, and rip rap bank protection. Temporary impacts will occur due to the installation of flow diversion dikes and equipment access. Construction sequencing is proposed as follows: 1. Install erosion control measures along the project. 2. Clear area as required for construction. 3. Open existing gates to dewater facility diverting flow through gates and maintain open. 4. Remove small spillway (dewater area around small spillway). 5. Construct riser, conduit and earthen embankment. 6. Restore East embankment and grades 7. Remove primary spillway and gates. 8. Construct primary spillway in sections beginning at east end. - Divert river flow through west side of the demolished spillway and build gate structure and four eastern most cycles of the labyrinth. - Divert river flow through newly constructed gates and build west side of labyrinth. 9. Stabilize all disturbed areas 10. Keep gates open until approval to impound is issued. Temporarily disturbed pond bed will be returned to original contours and elevations post construction and allowed to fill to original surface water elevation. During construction, erosion control measures will be installed, operated, and maintained under an approved Erosion Control Plan. Alternatives Analvsis The proposed design is the culmination of several iterations of alternative designs that aim to minimize the proposed work while maintaining public safety. Ultimately, an Incremental Hazard Evaluation (IHE) was prepared as part of the NC Dam Safety permitting process. The IHE identified the minimum spillway design capacity needed to meet the requirements of NC Dam Safety, which also resulted in the minimum required footprint which was the basis of design for this project. The initial estimates for the required spillway length exceeded 500 feet to meet this requirement and presented several constructability challenges. To minimize the required spillway length, McGill proceeded with development of an Incremental Hazard Evaluation (IHE). This analysis showed that the risks associated with flooding downstream of the dam did not increase for any storm event above the 500-year event. The IHE was approved by NC Dam Safety in March 2019. A further effort then proceeded to minimize impacts from the typical 300 feet linear spillway required to pass the IHE. McGill analyzed various types of spillway designs for hydraulics, constructability and cost concluding with the selection of the current labyrinth design. The selected design is a 6-cycle labyrinth with an 8° wall angle and half -round weir crest with a footprint length of only 185 feet. Page 3 of 4 The small spillway that suffered damage during the hurricane will be replaced with an armored earthen embankment essentially within the existing footprint of the existing spillway. A 3 feet x 2 feet riser structure is also required at this location to maintain hydraulic connectivity and low-level ecological flows between the pond and downstream channel. No -Action Alternative: This alternative involves leaving the breach as -is and not restoring the impoundment. While this alternative eliminates the proposed impact to jurisdictional areas from the installation of the labyrinth spillway and small spillway, it will result in additional adverse impacts to historic open waters, and continued release of sediment and bank/shoreline erosion downstream. While at full pool, Rhodes Pond provides a variety of habitat for native plant and animal species including Federal and State listed species such as the American alligator (Alligator mississippiensis), river frog (Rana heckscheri), blackbanded sunfish (Enneacanthus chaetodon), cypress knee sedge (Carex decomposita), pine barren boneset (Eupatorium resinosum), and long beach seedbox (Ludwigia brevipes). According to the NC Natural Heritage Program, the pond is listed as a R1 (Exceptional) - Coastal Plain Semipermanent Impoundment (Cypress -Gum Subtype) Natural Community. Portions of Rhodes Pond and the surrounding area are currently listed as a managed areas through the NC Clean Water Management Trust Fund - Funded Project, NC Division of Mitigation Services - Easement, NC Wildlife Resources Commission - Game Land, and Three Rivers Land Trust - Easement. In addition, the impoundment, which has been present in some shape since the 1700s, is a vital natural resource for the community. It is used for multiple recreational activities and provides secondary economic benefits. For example, an adjacent property is used as a facility for conducting social events. Therefore, this alternative was deemed impractical. Page 4 of 4 Block 22. Surface Areas of Wetlands or Other Waters Filled Dam/Spillwav Construction Site # Impact type Description Name Impact Area Equipment W1 Permanent Wetland Bottomland Hardwood Forest Wetland 1 0.09 acres Excavators, bull dozers, and dump trucks W2 Temporary Wetland Emergent Wetland/Pond Bed Wetland 2 0.38 acres Excavators, bull dozers, and dump trucks W3 Temporary Wetland Shrub, Scrub, Herbaceous/Pond Bed Wetland 3 0.02 acres Excavators, bull dozers, and dump trucks 51 Permanent Stream Perennial Black River 75 linear feet Excavators, bull dozers, and dump trucks 52 Temporary Stream Perennial/Pond Bed Black River 348linear feet Excavators, bull dozers, and dump trucks OW-1 Permanent Open Water Pond Rhodes Pond 0.23 acres Excavators, bull dozers, and dump trucks OW-2 Temporary Open Water Pond Rhodes Pond 0.49 acres Excavators, bull dozers, and dump trucks OW-3 Permanent Open Water Pond Rhodes Pond 0.50 acres Excavators, bull dozers, and dump trucks OW-4 Permanent Open Water Pond Rhodes Pond 0.06 acres Excavators, bull dozers, and dump trucks OW-5 Temporary Open Water Pond Rhodes Pond 0.18 acres Excavators, bull dozers, and dump trucks Re -flooding Pool Site # Impact type Description Name Impact Area Equipment Forested Wetlands Conversion Bottomland Hardwood Forest FW 169.3 acres N/A Scrub, Shrub, Herb Wetlands Conversion Shrub, Scrub, Herbaceous/Pond Bed SSHW 66.5 acres N/A Emergent/Marsh Wetlands Conversion Emergent/Marsh Wetland/Pond Bed EW 26.8 acres N/A Black River Conversion Perennial Black River 8,800 linear feet N/A UT -Black River lConversion lPerennial UT -Black River 11,971 linear feet N/A Open Water lConversion IShallow Pond I Rhodes Pond 18.9 acres N/A Open Waters, Streams and Wetlands in the Project Area The Rhodes Pond Dam (aka Rhodes Lake Dam) is located on the Black River in north Cumberland County, approximately six miles south of Dunn, North Carolina. The dam, owned and operated by NC Wildlife Resource Commission (WRC), consists of: • an earthen embankment east of the spillway separated from US 301 by a stormwater ditch; • a 107-foot main spillway located approximately 70 feet upstream of U.S. State Highway US 301 (Dunn Road) bridge over Black Creek (Bridge No. 145) • a gate structure housing the bottom drain adjacent to the main spillway's west end; • a roadway embankment (US 301) on the west side of the main spillway; • and a small spillway (30 feet long) located at the southwest end of the pond. Rhodes Pond (pond or reservoir) and its dam have existed in some form since the year 1770 and provides approximately 120 acres of open surface water for recreational use as documented in the North Carolina Department of Environmental Quality (NC DEQ) Division of Energy, Minerals and Land Resources (DEMLR) Dam Safety Program (NC Dam Safety) records, i.e., Dam Inventory Spreadsheet. The dam's ownership was transferred from the North Carolina Department of Transportation (NCDOT) to WRC in 2009 to preserve the pond. All proposed main spillway demolition and replacement construction work (temporary and permanent fills) will be conducted approximately 450 ft upstream of the Dunn Road bridge. All proposed small spillway demolition and replacement work will be conducted approximately 40 ft upstream and 100 ft downstream of the existing small spillway. The area to be re -flooded after construction will extend upstream along the Black River approximately 8,800 linear feet above the existing spillway to a point within and existing cleared utility right-of-way near Julian Road. Open Waters and Streams: Since the spillway failure in October 2016 the lake bed has remained mostly drained with pond levels dependent on seasonal rainfall events. Approximately 8,800 linear feet of the Rocky River and 1,971 linear feet of the UT -Rocky River have begun to channelize within the pond bed and reestablish natural flow. For the purposes of this permit, McGill has considered the majority (Approx. 8,4521f) of the Rocky River impacts and the entirety of the UT -Rocky River impacts to be considered conversion to Open Water once the pond is re -flooded. The Rocky River segment is perennial and generally 20 to 50 feet wide, and the UT -Rocky River is intermittent and generally 2 to 5 feet wide. Both contain a muddy -sand substratum, emergent and floating herbaceous aquatic plants, and riparian scrub/shrub plants and mature tree species previously listed. The majority of the waters within the proposed dam embankment and spillway construction areas are designated as "open waters" as their flow and ecological characteristics remain influenced by the dam. Based on observations made by McGill on several site visits, there are two relatively permanent large pools, one on each side of the existing inner berm and the main flow channel. These pools are designated Open Waters and total approximately 8.9- acres. Wetlands: Wetlands within the proposed full pool pond area can be divided into three general types: (1) forested wetlands, primarily in the northern upstream areas that make up approximately two-thirds of the total pond area, (2) scrub shrub and herbaceous early -successional wetland areas which are scattered Page 1 of 3 throughout the pond bed and were too deep to support trees when the lake was at full pond, and (3) emergent/marsh wetlands that have maintained water levels which limit the growth of herbaceous and woody species. Forested wetlands within the 278.5-acre historic pond area total approximately 169.3 acres, based on a combination of field delineation and photo -interpretation conducted by McGill during the fall and winter of 2019 and spring of 2020. They are somewhat extensive in the middle portions of the former lake bed and dominate the upper portions of the former lake bed and shoreline. The predominate species within these areas is bald cypress which has formed a mature stand with dense canopy restricting the growth of competing species such as black willow, sweetgum, and river birch. Shoreline areas and higher elevation sections contained sycamore, red maple, box elder, loblolly pine, and shortleaf pine. Scrub shrub/herbaceous wetlands within the 278.5-acre historic pond area total approximately 66.5- acres, based on a combination of field delineation and photo -interpretation conducted by McGill during the fall and winter of 2019 and spring of 2020. They are scattered throughout but most extensive in the lower two-thirds of the former pond bed where deeper water limited bald cypress proliferation when the lake was full. Predominant vegetation in these wetlands includes a mix of sedges, rushes, woolgrass, wax myrtle, and river birch and sweetgum saplings. Emergent/marsh wetlands within the 278.5-acre historic pond area total approximately 26.8-acres, based on a combination of field delineation and photo -interpretation conducted by McGill during the fall and winter of 2019 and spring of 2020.They are predominantly located just upstream of the existing main dam adjacent to the open water areas and Rocky River. These wetlands contained surface water at shallow depths which limited herbaceous and woody stem vegetation growth, but allowed for emergent species such as white waterlily and soft rush. Potential Impacts to Open Waters. Streams and Wetlands After the new spillway and lateral dam embankments on the main dam, and the improvements on the small spillway are complete, the drain gates will be closed and the pool refilled to 131-ft elevation, re - flooding approximately 278.5 acres of former lake bed area (including the stream channel area). This elevation matches the historic maintained pond level. Open Waters: Proposed improvements to the main dam and spillway will result in 0.50-acres of permanent and 0.49- acres of temporary impacts to open water. Flow diversion will be achieved by installing sheet piling and constructing an inner berm to allow for access and construction work to be completed in the dry, resulting in the temporary impacts. The installation of the labyrinth weir, concrete spillway, embankment repair, and rip rap protection will result in the permanent impacts. The restoration of the inner berm will result in approximately 0.23-acres of permanent open water impacts as fill will be placed, compacted, and stabilized to reestablish the berm and existing walking trail. Lastly, the proposed improvements to the small spillway will result in approximately 0.06-acres of permanent impacts and 0.18 acres of temporary impacts. Permanent impacts will be contributed to the new earthen spillway, riser structure, and rip rap bank protection. Temporary impacts will occur due to the installation of flow diversion dikes and equipment access. Page 2 of 3 The approximately 8.9-acres of existing open water area is proposed to be re -flooded changing from shallow pond habitats (suitable for amphibians, small fish species, aquatic avian species) to deep impoundment habitats (suitable for alligator, large game fish species). In addition, the 8,452 linear feet of the Rocky River, and 1,971 linear feet of the UT -Rocky River located upstream of the main dam construction area will be re -flooded changing from shallow, sand/silt bottomed low gradient streams to moderately deep impoundment habitats. The streams in this area appear to be braided and lose stream bed and bank structure throughout the reach. Riffle, run, and pool sequences were not observed within these areas which would provide habitat for flow -dependent species. No benthic invertebrates or fish species were observed during site visits. It appears that the conversion from stream habitat to moderately deep impoundment habitat throughout the reach should not significantly impact stream - dependent species, and would restore suitable habitat for historic reservoir species. Lastly, pond shoreline and littoral zone habitat will be reestablished providing access for species such as snakes, frogs, turtles, raccoon, whitetail deer, and black bear. Reservoir game fish populations will certainly benefit from the pond restoration and return the pond to a recreational destination for sportsmen. Streams: The approximate 3481f section of the Rocky River just upstream of the existing dam is a single channel that ranges from 15 to 25-ft in width. Stream depth in this area appeared to be in the 2 to 3-ft range limiting vegetative growth to the stream banks. While this section of the river did contain a few areas with riffle run characteristics and a substratum of sand and small gravel, no benthic invertebrates or fish species were observed during site visits. Like the upstream reach previously mentioned, proposed impacts or the conversion of this area to a moderately deep impoundment habitat should not significantly impact stream -dependent species. Proposed improvements to the main dam and spillway will result in 75 If of permanent and 348 If of temporary impacts to this section of the Rocky River. Flow diversion will be achieved by installing sheet piling and constructing an inner berm to allow for access and construction work to be completed in the dry resulting in the temporary impacts. The installation of the labyrinth weir, concrete spillway, embankment repair, and rip rap protection will result in the permanent impacts. Wetlands: The Scrub shrub/herbaceous wetlands and emergent/marsh wetlands are located primarily in areas of the pond bed that were unvegetated when the lake was full, or supported only aquatic vegetation. These areas will be converted from wetlands to open waters when the pond is refilled. Forested wetland areas with mature bald cypress trees that were historically present will likely remain forested, as these trees grew successfully for decades in permanent standing water. However, herbs and shrubs that may have colonized the understory in recent years will likely die out after refilling. Proposed improvements to the main dam and spillway will result in 0.38-acres of temporary impacts to emergent/marsh wetlands. Flow diversion will be achieved by installing sheet piling and constructing an inner berm to allow for access and construction work to be completed in the dry resulting in the temporary impacts. Proposed improvements to the small spillway will result in approximately 0.20-acres of temporary impacts to scrub shrub/herbaceous wetlands. Temporary impacts will occur due to the installation of flow diversion dikes and equipment access. Page 3 of 3 BLOCK 23. DESCRIPTION OF AVOIDANCE, MINIMIZATION, AND COMPENSATION Additional Information While we understand that the impacts associated with this permit application exceed the regulated threshold for replacing a failed structure in -kind under NWP-3, McGill Associates, PA feels it would be appropriate to waive the requirement for compensatory mitigation for stream and wetland impacts due to circumstances beyond the NC Wildlife Resources Commission's control (multiple extreme weather events, dated impoundment structures) and the fact that the naturalized shrub, herb, and marsh wetlands in the drained pond bed are young and sparsely vegetated with early successional species. Furthermore, re -flooding is not expected to adversely affect canopy trees in forested wetlands that have been present for many years. See the attached descriptive assessment of stream and wetland impacts in the project area. Page 1 of 1 G 0 w w a OW — 2, W2, S1 _ _TEMPORARY IMP) FLOW DIVERSION EQUIPMENT ACCE &=ffw,6, OW-2 — 0.49—P W2 — 0.38—ACR S1 — 348LF OW — 5 TEMPORARY IMPACT FLOW DIVERSION AND EQUIPMENT ACCESS 0.18—ACRES OW — 3 W3 PERMANENTIMPAC TEMPORARY IMPACT LABRYRINTH WEIR FLOW DIVERSION SPILLWAY AND RIP EQUIPMENT ACCESS PROTECTION 0 02—ACRES 0.50—ACRES / SECONDARY 'SMALL' SPILLWAY t � t ` OW-4 ♦ �♦ PERMANENT IMPACT ♦♦ SMALL SPILLWAY REPLACEMENT AND IMPROVEMENTS 0.06—ACRES I Legend � Project Limits ITemporary Impacts Permanent Impacts - , DATE 6/10/2020 1013 State Farm Road OFFICE MANAGER Boone, .1 McglU 28607 MC NC Firm License # C-0459 PROJECT MANAGER mcgillassociates.com DS PROJECT# 14.00135 DESIGNER AL REVIEWER JS INNER BERM/WALKING TRAIL I , OW — 1 / PERMANENTIMPACT EARTHEN FILL TO RESTORE / AND IMPROVE INNER BERM 1 0.23—ACRES 1 of I IL 00-- i T n (� r RAP'' I I I I I I � Jr ooi .� � y � EXISTING DAM/MAIN DAV— kt i i00 i0. oo PERMANENTIMPACT LABRYRINTH WEIR SPILLWAY AND RIP RAP PROTECTION 75LF t :. _ Id RHODES POND DAM REPAIR NORTH WON NR W TU E RESOURCE CORM ON CUMBERLAND COUNTY, NORTH CAROLINA W1 PERMANENT IMPACT SAND FILTER AND RIP RAP PROTECTION 0.09—ACRES i i i I i r � ♦ I �JJ* I I / I � I � I � *� 'r rA '�♦ - 7.. 7 �p1 ' NR R * Impact Totals OW 0.79 PERMANENT Acres OW 0.67 TEMPORARY Acres WETLAND 0.09 PERMANENT Acres WETLAND 0.40 TEMPORARY Acres STREAM 75 LF PERMANENT STREAM 348 LF TEMPORARY 200 0 175 350 GRAPHIC SCALE DIVISION VALUE = 175 FEET Impact Table OW - 1 0.23 PERMANENT Acres OW-2 0.49 TEMPORARY Acres OW-3 0.50 PERMANENT Acres OW-4 0.06 PERMANENT Acres OW-5 0.18 TEMPORARY Acres W1 0.09 PERMANENT Acres W2 0.38 TEMPORARY Acres W3 0.02 TEMPORARY Acres S1 348 LF TEMPORARY S2 75 LF PERMANENT PROJECT AREA I M PACT MAP FIGURE PROJECT# 14.00135 DESIGNER AL REVIEWER JS INNER BERM/WALKING TRAIL I , OW — 1 / PERMANENTIMPACT EARTHEN FILL TO RESTORE / AND IMPROVE INNER BERM 1 0.23—ACRES 1 of I IL 00-- i T n (� r RAP'' I I I I I I � Jr ooi .� � y � EXISTING DAM/MAIN DAV— kt i i00 i0. oo PERMANENTIMPACT LABRYRINTH WEIR SPILLWAY AND RIP RAP PROTECTION 75LF t :. _ Id RHODES POND DAM REPAIR NORTH WON NR W TU E RESOURCE CORM ON CUMBERLAND COUNTY, NORTH CAROLINA W1 PERMANENT IMPACT SAND FILTER AND RIP RAP PROTECTION 0.09—ACRES i i i I i r � ♦ I �JJ* I I / I � I � I � *� 'r rA '�♦ - 7.. 7 �p1 ' NR R * Impact Totals OW 0.79 PERMANENT Acres OW 0.67 TEMPORARY Acres WETLAND 0.09 PERMANENT Acres WETLAND 0.40 TEMPORARY Acres STREAM 75 LF PERMANENT STREAM 348 LF TEMPORARY 200 0 175 350 GRAPHIC SCALE DIVISION VALUE = 175 FEET Impact Table OW - 1 0.23 PERMANENT Acres OW-2 0.49 TEMPORARY Acres OW-3 0.50 PERMANENT Acres OW-4 0.06 PERMANENT Acres OW-5 0.18 TEMPORARY Acres W1 0.09 PERMANENT Acres W2 0.38 TEMPORARY Acres W3 0.02 TEMPORARY Acres S1 348 LF TEMPORARY S2 75 LF PERMANENT PROJECT AREA I M PACT MAP FIGURE 200 0 175 350 GRAPHIC SCALE DIVISION VALUE = 175 FEET Impact Table OW - 1 0.23 PERMANENT Acres OW-2 0.49 TEMPORARY Acres OW-3 0.50 PERMANENT Acres OW-4 0.06 PERMANENT Acres OW-5 0.18 TEMPORARY Acres W1 0.09 PERMANENT Acres W2 0.38 TEMPORARY Acres W3 0.02 TEMPORARY Acres S1 348 LF TEMPORARY S2 75 LF PERMANENT PROJECT AREA I M PACT MAP FIGURE PROJECT AREA I M PACT MAP FIGURE art.....dt IMPACT W1 — FILL CONSISTING OF = § PROPOSED SHEET PILING FOR FLOW DIVERSION SAND FILTER AND RIP —RAP DURING WEIR CONSTRUCTION. SEE PLAN SHEE- PROTECTION. FOR CONSTRUCTION SEQUENCE. APPROX. 0.09—ACRES SEE SHEET CD-101 FOR WORK BOUNDARY LEGEND TIE TO E70S71ND GRADES IMPACT S2 — CONSTRUCTION LABYRINTH WEIR STRUCTURE. APPROX. 75 LF - OF Impact FLOATING BARRIER, TYP. Table�-���DETAILS) N NOTES AND - Table OW -1 0.23 PERMANENT Acres OW-2 0.49 TEMPORARY Acres [RESTORE PACT OW1 —EARTHEN FILL TO EXISTING INNER BERM AND ALKWAY TO FISHING PIER. OW-3 0.50 PPROX. 0.23—ACRES PERMANENT Acres W1 0.09 PERMANENT Acres W2 1 0.38 TEMPORARY I Acres IMPACT S1 — CONSTRUCTION OF S1 348 LF FLOW DIVERSION BERM SYSTEM, TEMPORARY EQUIPMENT ACCESS FOR WEIR CONSTRUCTION. APPROX. 348 LF S2. PERMANENT 75 LF PERMIT DRAWINGS FOR REVIEW PURPOSES ONLY - NOT RELEASED FOR CONSTRUCTION 18EFGRFYO 5400 Trinity RoadI Fri Suite 107 McgIII Raleigh, NC 27607 NC Firm License # C-0459 � mcgillassociates.Com OGING 9 DUNN ROAD IMPACT OW3 — CONSTRUCTION OF LABYRINTH WEIR STRUCTURE, SPILLWAY AND RIP RAP PROTECTION. APPROX. 0.50—ACRES 01 ..4 EXISTING DAM STRUCTURE TO BE REMOVED. APPROXIMATELY 0.10—ACRES PROPOSED INNER BERM FOR FLOW DIVERSION DURING WEIR CONSTRUCTION. SEE PLAN SHEETS FOR CONSTRUCTION SEQUENCE. LABYRINTH WEIR SEE STRUCTURAL SHEETS FOR DETAILS 'ACT OW2 — CONSTRUCTION OF )W DIVERSION BERM SYSTEM, JIPMENT ACCESS FOR WEIR NSTRUCTION. PROX. 0.49—ACRES — CONSTRUCTION OF FLOW DIVERSION BERM SYSTEM, EQUIPMENT ACCESS FOR WEIR CONSTRUCTION. APPROX. 0.38—ACRES Legend Project i ' Limits Proposed Grading & Structure Permanent Impacts Temporary Impacts Forested Wetland Emergent Wetland Open Water 0 0 15 30 6L RHODES POND DAM REPAIR EXISTING DAM AREA GRAPHIC SCALE DIVISION VALUE = 30 FEET NORTH CRROLINR WILDL FE RESOURCE CO�MISS ON OFFICE MANAGER PAPERRSRIZEDE,PSIGNXGN ER AL IMPACT MAP CUMBERLAND COUNTY, NORTH CAROLINA PROJECT MANAGER DS REVIEWER is. DATE PROJECT FUNDINGM DESCRIPTION 6/8/2020 REV 14.00135 SHEET A-10 0 0 A / O ROAD ( / pUNN - - - - - - - - - - - / PROP. ETAIL 4 S CONSTRUCTION ENTRANCE (24•W x 50•L x B'D) (SEE DETAIL 4 N. C-505) YARD J vr i _- STAGE I TEMP. IMPERVIOUS DIVERSION DIKE _ / 1 / TEMP. FLOATING e i\I TURBIDITY BARRIER (SEE DETAIL 3 SM. C--,YARL \ ' ` \ / ��M - I • `Jr / /�—\ /� LAMP SEE SHEET CD-101 FOR \ ' WORK BOUNDARY LEGEND1120 20 IMPACT OW4 — EXCAVATION, RISER / ' / P STRUCTURE, NEW SPILLWAY, RIP RAP BANK PROTECTION. s o --- ��,\\`\ k� °oy - APPROX. 0.06—ACRES ��(�°� o NEW SPILLWAY - m(SF SEE �uLLSHEET C-504) REMOVE ESL SPILLWAY O� AND ENDWNIS (APPROK 3211 SF) h 0 Impact Table OW-4 0.06 PERMANENT Acres OW-5 0.18 TEMPORARY Acres W - 3 0.02 TEMPORARY Acres io-- /' PERMIT DRAWINGS FOR REVIEW PURPOSES ONLY NOT RELEASED FOR CONSTRUCTION 'IMPACT W3 —EXCAVATION, FLOW VvvvA�v�v xti 'tixti�`� __ DIVERSION DIKES, EQUIPMENT ACCESS. ' " v v vv APPROX. 0.02—ACRES \`=---_—�� / j STAGE TEMP. IMPERVIOUS ! ,�•�•�l DIVERSION DIKE 771 ✓ — _ / 46 ! :��IMPACT OW5 — EXCAVATION, FLOW --DIVERSION DIKES, EQUIPMENT ACCESS. APPROX. 0.18—ACRES I , a 0 O 0 6 Legend Project Limits < 000 Proposed Grading & Structure Permanent Impacts Temporary Impacts Open Water �'•,_.,._,.._,.,� J Shrub/Herb Wetland Forested Wetland 'w gEFORF Z. ° °° SHEET ro RHODES POND DAM REPAIR I Fri 540e107tyRoad �� �a SMALL SPILLWAY Q GRAPHIC SCALE DIVISION VALUE = 2° FEET Raleegh0, NC 27607 c NORTH CRROLINRW LDL FE RESOURCE COMM SSION OFFICE MANAGER PAPER SIZE DESIGN ER IMPACT MAP A' 11 mcgiII NC Fir Lice m BR AL NC Firm License It C-0459 9F6 ��� mcg Ilassociates.com GAGGING QPP CUMBERLAND COUNTY, NORTH CAROLINA PROJECT MANAGER IDS REVIEWER JS DATE PROJECT# FUNDING# U. DATE Uv o �criiF �n 6/8/2020 REV 14.00135 ut WETLAND TABLE FORESTED 169.3 WETLAND ACRES SHRUB HERB 66.5 WETLAND ACRES EMERGENT 26•8 WETLAND ACRES OPEN 8.9 WATER ACRES 7.0 STREAMS ACRES HISTORIC 278.5 POND ACRES AREA �,�gEFGRFY�G 0 GING PPe� NO, DATE BY OESG2iV :. I _. vf Legend FORESTED WETLAND SHRUB AND HERBACEOUS WETLAND EMERGENT WETLAND x ! lii1 K OPEN WATER HISTORIC POND Sl ELEVATION (131 FT) C:D EXISTING DAM STRUCTURE ' APPROX. 0.10 —ACRES"', "5 ° 175 35° SHEET RHODES POND DAM REPAIR CONVERSION OF WATERS GRAPHIC SCALE DIVISION VALUE = 115 FEET NORTH WON WILDLIFE RESOURCE CO�� SS ON OFFICE MANAGER MC PAPERSIZEDESIGNER AL I M PACT MAP 1 A 12 CUMBERLAND COUNTY, NORTH CAROLINA PROJECT MANAGER DS REVIEWER JS, DATE PROJECT* FUNDING* 6/9/2020 14.00135 Fl. .T ?C.. .y,.�F 1Aq i'.... ., r y4•. ;,' _'•: Ss '!e Sr �A_,"-;.. r }G `ie* t. r: fir.: eyfmt. i • }•d .�. !Y-. -b,. d :,A ` .+ •u IP+. '� - do 'rf t'�� I • �Y� JA' ..r .;l ¢' 1$ "''�' s q"k9• . yy; , ''i.:t',:` Y'• 1.+ •sl f. tIF -'.4.� WETLAND TABLEND + a � �.' ". ` .- y •' i • S # wit.. J�*`' _ � ' tY'''r �'i .y, � ,r eC • • . •Ts • a !f .i,. � -1; ,� I 1 '-� �.;.. ..F a!v' ,* aµ. '� � ; s r "•� ;� <.'• .f. Y '1.`"t„s; s y. FORESTED 9SHRUB �� t er yN r r e• tt !iF•.# � �� � .� WETLAND ACRES s �` ; . `r„ -.w '-etc �. p:' r. + ,�`.,.,t ` I _ n, ,* HERB WETLAND �f .! r Y .,9:- � WO�mLj �j�y '%^,�'t$� �R�.2" ♦t '�,� 3 .s'pn � ?#. �t �tv T .,.".°'4,ti' „,✓jd''y.fLrt9j. vyafdt.2�.')xl - �;t :,:"a&..F''..,i EMERGENT Ir WETLAND .r dY• � ���`� �'' � fir. ,_.*� '+.)rA _ , r ,� �' ° J ".y ;e ry. f � �. T� �. �' � ',t' �-"Rl�� y}''. r� ,tic, '.o° v.,i _�� � ['�.^� •.o W 5,r,� _I f w ,y} .1' °p� ;d • t:J! "r" . -IC�_; a. �r y' �:d �'�f.i Tt,• =V iQ ♦ •�''1�',� 1 r �'. /' :{'%,{'�. ', lip, V.�.;. 3� j7 f �' '„�.. :1,2`' ,- •: "r+ .. �I: .,,. .� � .y . � ., . �' 'fib - < id-sGS�,� � `'� Y �1w 'p '...b �s;A {i ,�j{�,[ �.p; j,♦�.,�'.. �d� r, e ,� +i.f: '� 'ai` + c�t,,l". ? %•+'�'.tq,� • i. +Y o�'•,, ' � i,, � "[ / r '*-..r!, :+ ti., `:. � ��' �,'y. �y �+ 'F.. ,•�'' ii" _.:�# - �w � �Y'„�. +' .. �. t'.+r: ,Wtt# ,� F4+"�»i `;: �.r, rf_, ,� 'i't'':Ct.:;' ..✓ +z . '"!. �r,.3i° "}f_T+, 5k ty'?�ti',p e+ 1 . ;:4�b 9. 't� i`.•,+: .r A*�.�. �� y� ` r Ury r 5;. • .i+g:.. - i .�•.,...�'�.73 �r 1 s . �, „��:sY{ �� r�Ki: �' �•;s ! ar'.:. jq � :'"; J . ��; u,�'� .+�y,,#1 t< �i••. '�'.,i v. u�r sa �. +} � � dRr. , r } !' .!.' tdS ,,�<,r'.,�' }:, • \� {{ % 'n , 4 ,'Rr i;•i^ �� t _ ;i',`Ik4 + t 'tiw .- { .; Jl r % N • +r�9�'' ''�' ' �` > 7 '�-' �". �;�•��� b'" 7'a.,ti� ` a wa � �., M �rvx..t. � ���r';.,�' +� HISTORIC 278.5 f1 `. ,'rf s2 •y "' 'k.+>�JAA, # ;`°•, +�u ,:x`p,^� ,* t `T '°' kF y,�'. 't _ • x �+r 41rACRES POND '( a AREA 1 .>' ,fi � _� r . / >r a., �,7,. •ram' !.'�• ' r'- m" ,T;. a ,; d'r`` <^.� r' <� .?t 't. � H.. .� 4 '1w a y `, ."tt ' T �'i.•> yy � •�4W. " f4F t; •''fit•- a: .. ,. �„ ;� '"ti� y..-r` .`�T'4t. v 5F i �}♦ 1. d ,� . 'w �.'�; �/,� �'." �45 •tf, #�4'':7 �''+, ^. �7/ \" I ', All,{ fI7" %� «.( !•� ". ���RY i' �af.ryi }ti �,�a5f 'p.II �'97 ! \'_\•� O FORESTED WETLAND '� � � .• ,k� � �t ? 7 �.,, T �f•,�'7�1`y^�"•�j!�(�JJi' ,7{�"''V: '�. • ' % \ :� 1 • t r.'� • P+L � + � , �� ,t♦ s SHRUB AND WETLAND f, EMERGENT WETLAND Tt �� ! 1 f 7WE�TL D e. ELEVATION�1 11 • , , ��'. i�i� Block 25. Adjoining Property Owners Name (first and last) Mailing Address City St Zip PATTERSON, JOHN B & WIFE 3565 BEARD RD EASTOVER EASTOVER NC 28312 MCLELLAN, LINDA C 5468 MCLELLAN RD DUNN NC 28334 DUNK NC 28334 DRL PROPERTIES LLC PO BOX 1152 DUNK NC 28335 DUNK NC 28335 HEADWATERS TIMBER LLC 3700 GLENWOOD AVE 400 RALEIGH NC 27612 RALEIGH NC 27612 CURRIN, HELEN B 2324 41 ST ST 225 WILMINGTON NC 28403 WILMINGTON NC 28403 BASS, JOHN R PO BOX 238 SPRING HOPE NC 27882 HOPE NC 27882 N C DEPT OF TRANSPORTATION 1546 MAIL SERVICE CTR RALEIGH NC 27699-1549 RALEIGH NC 27699-1549 FULCHER, LOUIS A JR & WIFE 11179 DUNK RD DUNN NC 28334 DUNK NC 28334 HEADWATERS TIMBER LLC 3700 GLENWOOD AVE 400 RALEIGH NC 27612 RALEIGH NC 27612 MICHAEL, THOMAS R PO BOX 311 GODWIN NC 28344 GODWIN NC 28344 COLLIER, LINDA MCLELLAN 5468 MCLELLAN RD DUNN NC 28334 DUNK NC 28334 WEEKS FARMS INC 163 RUFFIN RD DUNN NC 28334 DUNK NC 28334 128342 FALCON CHILDRENS HOME PO BOX 39 FALCON NC 28342 FALCON NC FULCHER, LOUIS A IV & WIFE PO BOX 85 GODWIN NC 28344 GODWIN NC 28344 GUIN, SUE PARRISH PO BOX 535 BENSON NC 27504 BENSON NC 27504 FALLEN BROTHERHOOD MOTORCYCLE PO BOX 220 GODWIN NC 28344 GODWIN NC 28344 LUCAS, SYBIL T 816 SAGE CREEK LN 4 FAYETTEVILLE NC 28305 FAYETTEVILLE NC 28305 H & J FARMS INC 2324 41 ST ST 225 WILMINGTON NC 28403 WILMINGTON NC 28403 HEADWATERS TIMBER LLC 13724 NATIONAL DR STE 130 IRALEIGH INC 27612-4070