Agenda - Council - 12/16/2003 - Laserfiche WebLink

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Final Plat Highlands at River Park 4th Addition December 12, 2003 Page 2 of 5 The minimum horizontal curve radius on a minor street is 100 feet. The current plans' show curves with 70 and 80 radii. Please revise the street plan accordingly. There is no vertical curve shown at station 100+15 where the algebraic difference in grades is 7.35%. The minimum is smaller of 100 feet or 20 x the algebraic difference. o Lot Size, Dimensions, and Setbacks: All of the lots meet the 10,800 square foot lot area requirement and 80 foot lot width, 90 foot lot width for comer lots, requirement measured at the building setback. The final plat is consistent with the approved preliminary plat. 6. Grading and Drainage: These comments are based on the Grading, Drainage and Erosion control plan dated March 21, 2003. Grading is shown off the plat on Highlands at River Park 1st Addition, Block 4, Lots 11, 12 and 13. Currently these lots are empty and presumed to be owned by the developer. A written agreement should be prepared that will allow grading on these lots to achieve final grade in the event that the lots are sold prior to construction of this project. · The proposed drainage and utility easements shown on the plat should be added to the construction plans. Drainage arrows must be shown on all lots. Lot 4 is shown as a custom lot. There is 4 feet of grade change across the front of the house pad and the proposed house elevation is shown at the highest elevation. Location of the garage on the north side of the house may require retaining walls. The proposed pad elevation for lot 4 is 4 feet lower than lot 3. Additional detail regarding the house elevations in lots 3 and 4 is required even though they are custom lots since the existing drainage from lot 3 flows across lot 4. · Please provide drainage calculations to support the HWL elevation shown on the grading plans. · The lowest floor elevation for lot 10 in the lot tabulation does not match the lowest floor elevation shown on the plans. Easements. The standard 10 foot drainage and utility easements (5 feet on common property lines) are shown on the preliminary plat and must be provided on the final plat. Any wetlands located on the property must als0 be delineated and dedicated as drainage easements. Utilities. These comments are based on the Preliminary Utilities Plan dated August 5, 2002. Staff has the following comments: