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HomeMy WebLinkAboutNHCo TRC Rev-HeronHill August 31, 2023 New Hanover County Engineering Department 230 Government Center Dr. Wilmington, NC 28403 Attn: Amy Doss Re: Heron Hill SUBPP-22-0007 TE 22016 Dear Amy: In response to the December 7, 2022 TRC Comments for Heron Hill (Motts Forest East), we offer the following: Planning, Amy Doss 1. Zoning: R-15 a. Use: Performance Residential. It appears that the proposal generally meets the requirements specified in UDO Sections 3.2.8 and 3.1.3.D, requiring performance residential dwellings in the R-15 districts to comply with the following standards specified in UDO. 2. General Comments: a. As a recommendation please clearly show ADA accessible connections and warning strips to the sidewalks in the required locations. • ADA accessible sidewalk connections have been added. b. Please label entry gates. • Entry gates have been labeled. c. Please show sight triangles for ingress/ egress at all access points. • Sight triangles have been added to the plan. d. Please clearly indicate the location for any proposed signage, if applicable, UDO Section 5.6. • Sign easements have been added. e. Will there be any mail kiosks? If so, please provide a paved area with ingress/ egress and parking as required by UDO Section 6.2.2.A.15. • Mail kiosk locations are shown. 3. Open space conforms with UDO Section 5.8.2.2, with the proposal showing slightly more than 20% of the design containing 23.85 acres of with a proposed 4.95 acres of open space. 4. Tree Retention: a. Please apply for a Tree Removal Permit. • Tree removal permit application is enclosed. b. Please be aware that a Tree Removal Permit is required prior to any land disturbance activities. Please provide the specific species (Loblolly Pine, Long Leaf Pine, etc.) of the trees to be removed or retained to determine required mitigation. • Species of trees to be removed are indicated on sheet T2. TRIPP ENGINEERING, P.C. 419 Chestnut Street Wilmington, North Carolina 28401 Phone: (910) 763-5100 • FAX: (910) 763-5631 c. Please clearly illustrate what trees are being preserved and what trees are proposed to remain. • Trees to be removed are illustrated with an “X” on sheet T1. d. All specimen trees located within subject tract are required to be illustrated as well. UDO Section 5.3.5.C The removal of any specimen tree is prohibited on any parcel unless exempt according to Section 10.3.11, Variance Zoning and Subdivision. If a specimen tree is removed without a permit, the penalty for this violation shall be twice the mitigation fee. • No specimen trees exist on site. e. Please be aware that there are optional incentives for retaining trees on site, UDO Section 5.3.8.A.2. • Noted. f. Please see the chart below indicating the documented, significant, and specimen trees regulated by the County. • Acknowledged. g. Per UDO Section 5.3.4.C, of the UDO requires a minimum of 15 trees at least 2” DBH must be retained or planted on the parcel where development occurs for each acre or proportionate area disturbed. Please add a note to the Landscape Plan showing has this requirement has been met. Please note that required landscaping for the project can be credited to meet this requirement, however, required landscaping does not count towards mitigation, if applicable. • Landscape plan to be provided by others. Note to be added to plan. h. Per UDO Section 5.3.6.B, please be aware that prior to any construction activity protection fencing is required around protected trees or tree stands. The fencing shall be a minimum of four feet and shall remain in place through completion of construction activities. • Tree protection fencing is shown on Tree Inventory Plan. i. Tree inventory plans are required to reflect the trees being retained and the trees being removed clearly. Please see the example below, which illustrate the trees with the X’ s being removed and the trees and the trees being preserved showing the protection in the correct placement. • Tree removal plan indicates trees to be removed with an X. Tree protection has been added. 5. Easements: a. UDO Section 6.2.2, please ensure all Storm Sewer, Sanitary Sewer, and Water Main Utility Easements are labeled. • Easements have been labeled. 6. Roadway Design: a. Please verify that the tangent lengths meet the code requirements specified by the County’ s private road standards. • Tangent lengths are adequate. 7. Lighting: a. Please note that with the latest update to the UDO, a lighting plan is not required at time of TRC Approval. See below excerpt from Section 5.5.3: i. Information about the exterior lighting for the site that demonstrates compliance with the standards in this section shall be submitted in conjunction with an application for site plan approval (Section 10.3.6, Site Plan) or zoning compliance approval (Section 10.3.8, Zoning Compliance Approval), whichever comes first, approved no later than at time of construction plan approval. b. The lighting plan should illustrate that street lighting, all exterior lighting, and indoor lighting visible from outside shall be designed and located so that the maximum illumination measured in foot candles at ground level at a residential lot line meet the UDO Section 5.5. Please refer to Table 5.5.4 of the UDO for additional standards. • Lighting plan to be provided by Duke Energy. 8. Please note that no building permit for any structure shall be issued which requires NCDOT approval for a Driveway Permit until NCDOT has issued the approval. Evidence of approval shall accompany the application for building permit. • Noted Fire Services, David Stone 1. Roads and driveways: a. All-weather, hard surface access is required during construction to accommodate fire apparatus weighing at least 85,000 pounds. (NCFC D102. 1) • Acknowledged b. Minimum road width with fire hydrants is 26 feet with no on-street parking. (NCFC D103.1) • Road width is 28’. No parking to be allowed on street (see notes 8 and 10.) c. Vertical clearance of 13' 6" is required over the full width of all roads. (NCFC 503.2.1) • Noted. d. Road grade shall not exceed 10%. (NCFC: D103.2) • Road grades do not exceed 10%. e. Dead-end roads exceeding 150 feet in length require an approved turnaround. (NCFC: 503.1.1; D103.4; Table D103.4) • Cul-de-sacs meet fire code requirements. f. Clarification needed: shaded area from the cul-de-sac, between lots 55, 56, and 62 leading to lot 63. • Shaded area is 30’ access and utility easement. g. Cul-de-sacs must have a minimum diameter of 96 feet. (NCFC D103.4 & Table D103.4) Minimum turning radius for fire apparatus is 45 feet within the curbs with no on-street parking. (NCFC 103.3) • Cul-de-sacs meet fire code requirements. h. Gates: If not continuously attended, electric gates must have a Knox key override switch and a siren activated opener for emergency vehicle access. Manual gates must have a Knox padlock to allow for Fire Department access. Gates must be able to be opened in the event of a power outage. • Note has been added to the plan. 2. Traffic Calming Devices: Highly discouraged as they delay emergency response of all types and cause damage. Speed bumps or humps are prohibited. Other traffic calming devices must be submitted and evaluated during the Technical Review process. (NCFC 503.4.1) • No traffic calming devices are proposed. 3. Other Considerations: a. The NCFC requires a viable water supply at time of construction. 1. Options: install water mains and hydrants or use a nearby existing hydrant system. A temporary water tank is a suggestion in the NCFC, but is discouraged. o Noted 1. Approved hydrant locations: 1. between lots 7/8 2. between lots 28/29 3. on lot 43 • Hydrants have been located on approved lots. b. Hydrants must meet CFPUA standards and be free from obstructions within a 3' radius minimum. (Examples: streetlights, utility boxes or equipment, transformers, substantial landscaping that could obscure they hydrant at maturity, etc.) • Acknowledged. b. Street or road signs: Temporary signage is required at each intersection once construction of roadways allow for passage of any vehicles and shall be maintained until they are replaced with permanent signage. • Acknowledged. c. Address identification: premises identification is required with a minimum of 6 inches in height and a ¾ inch brush stroke. • Acknowledged. NHC Engineering (Stormwater), Galen Jamison 1. A land disturbing and a stormwater permit issued by the County are required for this project in addition to the State stormwater permit. Please submit for permits as the design is completed. • State and County stormwater permits and land disturbing permit have been applied for. 2. The existing ditches located in lots 30-33 may require additional tree removal. Please coordinate proposed grading with the tree removal plan as the design is completed. • Additional trees have been marked for removal on lots 30-33. 3. Please ensure via a lot grading plan or proposed contours the all impervious surfaces for the perimeter lots are directed to the proposed stormwater control measures. • Typical lot grading plan detail and note have been added to plan. 4. Please indicate the proposed well site by Aqua on the existing conditions mapping. • Well site has been added to the plan. 5. The wetland mapping note indicates a date of 2011 which is outside the 5 year timeframe for wetlands determination. Please verify with the authorities having jurisdiction. • Updated wetland determination is has been approved. 6. The discharge from the pond appears to result in stormwater turning greater than 90 degrees and doesn’t appear to connect to the existing conveyance system. It is recommended the pond outfall piping be aligned better with the existing discharge pattern to the south and additional survey be obtained to verify existing elevations and contours. • Pond outfall has been relocated to the south. Cape Fear Public Utility Authority, Bernice Johnson 1. CFPUA TRC Comments provided are preliminary comments only. Noted. 2. Utility Plan review required by CFPUA. CFPUA is moving toward becoming paperless. When ready to submit plan review package, upload all documents to https://www.cfpua.org/FormCenter/Engineering- 3/Engineering-Plan-Review-103. Noted. 3. CFPUA sewer available through a mainline extension to serve the subdivision. Acknowledged 4. NC Aqua water. Noted. 5. At this time capacity is available. Acknowledged 6. Capacity is also dependent on the analysis of the pipe collection system (gravity and force mains). • Sewer plans have been submitted for review. 7. A capacity determination can be provided upon submittal of the NC DWQ FTA/FTSE Application Form and a Preliminary Plan, this determination does not guarantee capacity. • Review application and plans have been submitted for approval. 8. Capacity is issued to projects on a first come, first serve basis, when capacity is available, the plans meet Authority requirements, and the NC DWQ FTA/FTSE forms are signed by the Authority. • Acknowledged. Environmental Health, Dustin Fenske 1. Proposed public sewer force mains and manholes must maintain setbacks to existing wells at 5700 and 5704 Carolina Beach Rd. along with wells of properties on Grand Champion Rd. Setbacks are 50 feet from a force main and 100 feet from a manhole to existing well. • Sewer setbacks have been met. NCDOT, Nick Drees/Mike Frank 1. These preliminary comments and are based on the plans as submitted for the proposed site and are subject to further review upon receipt of any additional information. Subsequently, additional comments and/ or requirements may be necessary for this site. Noted. 2. NCDOT Driveway Permits, and Encroachments are submitted through the NCDOT Online Portal. Noted. 3. A NCDOT Driveway Permit is required. Submit a plan in accordance with pages 14 and 15 of the Policy on Street and Driveway Access to North Carolina Highways to include access locations within 500’ of the proposed access on both sides of the State Road. Submit to the local NCDOT District Engineer’ s Office. a. This section of Jacob Mott Drive is not currently state maintained; however, a petition has been received to add and is currently under review. • NCDOT Driveway Permit application will be submitted upon state acceptance of Jacob Mott Drive. b. Landscaped islands will need to be labeled and designed according to NCDOT policy. • No landscaped islands are proposed within the NCDOT right of way. c. Per Note 3 “ALL ROADS SHALL BE BUILT PRIVATE”, the subject roads will not be eligible to be added to the state system at any time. i. Subsequently notes 13 and 14 are obsolete unless NHC is making this a requirement. • Notes have been removed. ii. The “typical” should show private r/w and should meet the construction requirements of NHC. “A” mix would not meet NCDOT’s current requirements either. • Road cross-section detail has been updated. 4. Driveway connections for lots 1, 38, 39 and, 60 should be located as far from Jacob Mott Drive as possible. • Noted. 5. What are the proposed access points for lots 61-63? • 30’ access easement is proposed. 6. An NCDOT Encroachment Agreement is required for any utility connections or installation within NCDOT right- of-way. • Encroachment Agreement will be submitted. US Army Corps of Engineers Brad Shaver 1. A wetland delineation has been approved by the Corps that included both jurisdictional wetland and non- jurisdictional wetland (regulated by the State). It appears that the federally regulated jurisdictional wetlands may be avoided in the submitted plan. • Acknowledged. Addressing, Katherine May 1. Parcel address is 551 Jacob Mott Drive ( PID: R07600- 006- 012-000). • Parcel address has been updated in the site data table. 2. Mark mail kiosks. New subdivisions do not get individual mailboxes. • Mail kiosk locations are shown. 3. Please contact me with the final plat, following TRC approval, to start the addressing process. • Acknowledged. 4. Subdivision name of Heron Hill is approved. Noted. 5. Street Names: 4 will be required. a. Heron Hill – Approved. b. Motts Village East – No directionals, too close to “Motts Village Road”, not approved. c. Douglas - Approved. d. Negley – Approved. e. Northumberland – No directionals, not approved. f. Wessex – Approved. g. Blue Heron – Taken, not approved. h. Squirrel Hill – Approved. 6. Street suffixes ( Rd, St, Dr, etc.) are chosen based on the physical characteristics of the street. a. Red: Lane, Place, Row, Run, Way b. Green: Lane, Place, Row, Run, Way c. Blue: Lane, Row, Run, Way d. Yellow: Lane, Place, Row, Run, Way • Heron Hill Road, Orly Lane, Ellen Dale Road, and Yellow Finch Lane will be utilized and have been approved. WMPO, Jamar Johnson 1. No comments. Please review for approval and contact us with any questions, comments or if you need additional information. Thank you. Sincerely, Tripp Engineering, P.C. Phillip G. Tripp, P.E. PGT:dcb Enc.