#13 - Royal Golf Club 6th Addition Final Plat and PUD

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\\barr.com\projects\Mpls\23 MN\82\2382020\_MovedFromMpls_P\2023\Permit 2023-12 Royal Golf Club 5th and 6th Additions, Lake Elmo\Permit Ltr_2023- 12_RoyalGolfClub_5th and 6th Additions_Lake Elmo.docx 1. Prior to work over the VBWD’s Project 1007 pipe: a. The plans shall be revised and submitted for approval, including: i. Replace the pipe with a higher-class pipe that can accommodate the proposed fill depths, or ii. Redesign the site or fill material (e.g., lightweight fill) to reduce the loading on the pipe to meet the structural load requirements of the existing pipe and bedding. b. The developer shall conduct and provide recordings of pre- and post-construction video inspections of the entire VBWD Project 1007 pipe and structures with the site’s construction limits. c. The developer shall submit details on how the two existing VBWD catch basins will be reconstructed to accommodate the fill (including the proposed castings) for approval by the VBWD Managers. d. The plans shall be revised to show VBWD’s Project 1007 Catch Basin 30, which is approximately 229 feet downstream of the flared-end section at a bend in the pipe. 2. Details of how stormwater runoff will be managed at the transition from curb and gutter to a rural section at the proposed entrance from Manning Trail shall be provided for VBWD approval and designed to minimize erosion and provide water quality treatment, as feasible. The developer is responsible for obtaining the necessary permissions from West Lakeland Township for the work in this area. 3. The following changes, as previously accepted by the developer, shall be made to the plans so that the stormwater runoff from all proposed new and fully reconstructed impervious surfaces is better managed: a. Wetland 15 shall be protected by a drainage easement b. As much water quality treatment as possible shall be provided north of the trail, near lots 245 and 246 c. Grasses alongside the trail and between the road the trail near Rose Lake shall only be mowed two times per year d. The proposed infiltration basin upstream of Wetland 2 shall be revised to be no deeper than 1.5 feet 4. The number of soil borings at proposed infiltration basin IB52 shall be listed on the plans. The number of soil borings shall be as listed in the Minnesota Stormwater Manual. 5. The extra 908 contour closest to the proposed house pads shall be removed from the plans in Lots 266–268. 6. The VBWD shall be granted drainage easement to the land south of Outlet E up to the 100-year flood elevation. 7. The required surety shall be submitted prior to construction. 8. Annual monitoring reports shall be submitted for Wetland 2. The reports shall report water levels and vegetation and include photographs taken immediately after rainstorms and, again, after 48 hours. If the wetland does not act as an infiltration basin, other stormwater management practices shall be constructed that meet the VBWD Rules. 9. The owner shall remove all downed trees, debris, and an abandoned bridge within the banks of the Lake Elmo outlet channel between Lake Elmo Avenue to the west and the flared-end section near the former archery range on the east. The owner shall agree to maintain the conveyance of the channel, remove all trees and debris within the channel, and keep the flared-end section open and free of debris. 10. Wetland buffer signage must be installed as required by the VBWD Rules and Regulations. Specifications for the buffer vegetation and signs shall be submitted to and approved by the VBWD prior to installation and planting. 11. This permit is not transferable. 12. This permit is subject to obtaining all other permits required by governmental agencies having jurisdiction (including but not limited to an NPDES permit). 13. The VBWD Engineer and Inspector shall be notified at least 3 days prior to commencement of work. 14. Erosion controls shall be installed prior to the commencement of grading operations and must be maintained throughout the construction period until turf is established. Additional erosion controls may be required, as directed by the VBWD Inspector or VBWD Engineer. 15. The following additional erosion controls shall be implemented on the site: a. All proposed slopes 3-feet horizontal to 1-foot vertical (3H:1V) should be covered with an erosion-control blanket. b. Silt fence should follow existing contours as closely as feasible to limit the potential for gully erosion along the edges. c. Any sediment that collects in storm sewers, ponds, or other water-management features shall be removed. d. Street sweeping shall be performed if sediment collects on the streets. e. If erosion occurs at the outlets of the storm sewer pipes, the applicant will be responsible for correcting the problem to the satisfaction of the VBWD. 16. To prevent soil compaction, the proposed infiltration area shall be staked off and marked during construction to prevent heavy equipment and traffic from traveling over it. If the infiltration facility is in place during construction activities, sediment and runoff shall be kept away from the facility, using practices such as diversion berms and vegetation around the facility’s perimeter. The infiltration facility shall not be excavated to final grade until the contributing drainage area has been constructed and fully stabilized. The final phase of excavation shall remove all accumulated sediment and be done by light, tracked equipment to avoid compaction of the basin floor. To provide a well-aerated, highly porous surface, the soils of the basin floor shall be loosened to a depth of at least 24 inches to a maximum compaction of 85% standard proctor density prior to planting. 17. All disturbed areas shall be vegetated within 14 days of final grading. 18. The applicant is responsible for removal of all temporary erosion-control measures, including silt fence, upon establishment of permanent vegetation at the project site, as determined by the VBWD Engineer and/or Inspector. 19. The minimum floor elevations for all buildable lots in the development shall be recorded in a Declaration of Covenants and Restrictions or on the final plat. 20. The VBWD shall be granted drainage easements which cover (a.) land adjacent to stormwater management facilities and lowlands up to their 100-year flood elevations and (b.) all ditches, storm sewers, and maintenance access to the stormwater management facilities. 21. The required drainage and access easements shall be recorded with the Washington County Recorder’s Office. 22. Return or allowed expiration of any remaining surety and permit closeout is dependent on the permit holder providing proof that all required documents have been recorded (including but not limited to easements) and providing as-built drawings that show that the project was constructed as approved by the Managers and in conformance with the VBWD Rules and Regulations. 23. Valley Branch Watershed District’s pipe shall not be relocated until both the Valley Branch Watershed District and the permitholder fully execute an agreement listing the terms of conditions for the relocation. 24. Minimum floor elevations must be approved by the VBWD Engineer prior to being recorded in a Declaration of Covenants and Restrictions or on the final plat. Approved: March 9, 2023 President Signature Valley Branch Watershed District Title Note: The grant of this permit in no way purports to permit acts, which may be prohibited by other governmental agencies.