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HomeMy WebLinkAbout16-0817 Weston Heights North Utility I Comments (2)H:\CED\Planning\Development Engineering\_Ian\2016\Utility Permit\U16-003996 Weston Heights North Short Plat\Review Comments\16-0817 Weston Heights North Utility I Comments.docx DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT M E M O R A N D U M DATE: August 17, 2016 TO: Scott Mesic, SDA FROM: Ian Fitz-James, Civil Plan Reviewer SUBJECT: Utility Permit Review I Comments Weston Heights North Short Plat - 702 Nile Avenue NE City of Renton Permit #U16-003996 I have reviewed the first utility permit plan submittal for Weston Heights North Short Plat located at 702 Nile Avenue NE and my comments are listed below. Please feel free to contact me if you have any questions or would like to schedule a meeting to review project concerns. My phone number is 425- 430-7288 and my email address is ifitz-james@rentonwa.gov. GENERAL COMMENTS 1. There is a digital set of redlined plans and a digital redlined TIR. 2. Include a letter with responses to all of the comments with your plan resubmittal. 3. Please have approved water plans from King County Water District 90 routed to the City for final review prior to permit issuance. 4. A Construction Stormwater General Permit from the Washington Department of Ecology is required as clearing and grading of the site exceeds one acre. A Utility Permit cannot be issued until the NPDES permit is obtained. TITLE SHEET COMMENTS – SHEET C1.0 1. The project utility permit number is #U16-003996. Add this to the cover sheet. There are no building permits associated with this utility permit so you can remove the building permit line. 2. Add the utility permit number to each sheet in the bottom right hand corner (TYP). Weston Heights North Short Plat – U16-003474 Page 2 of 6 August 17, 2016 H:\CED\Planning\Development Engineering\_Ian\2016\Utility Permit\U16-003996 Weston Heights North Short Plat\Review Comments\16-0817 Weston Heights North Utility I Comments.docx 3. Provide survey control map with monuments used to establish basis of bearings. 4. Fill in drawing scale on all sheets (TYP). GENERAL NOTES COMMENTS – SHEET C1.1 1. Add an erosion control note stating that all ESC measures must be removed after construction activity is complete. T.E.S.C PLAN COMMENTS – SHEET C2.0 1. Adjust the clearing / grading limits to show that the majority of Lot 1 is undisturbed (TYP). 2. See Sheet C3.0 for review clearing limits along NE 7th Place. 3. Show rock construction entrance per COR Std. Plan 215.10 or wheel wash station per COR Std. Plan 215.00. 4. Per the sizing calculations in the TIR, the required surface area for the sediment trap is 428 SF. 5. Label the emergency spillway for the sediment trap. 6. Demolition of the existing shop shall be under a separate permit. 7. Correct the misspelling of the word disturbed in Construction Sequence #14. T.E.S.C. DETAILS COMMENTS – SHEET C2.1 1. Add COR Std. Plan 215.00 – Wheel Wash or COR Std. Plan 215.10 – Stabilized Construction Entrance to the plan. SITE PLAN COMMENTS – SHEET C3.0 1. NE 7th Place shall have a crown along the centerline of the roadway that is consistent with what was built from Sta. 36+73.00 to Pasco Place NE and from Nile Avenue NE to Sta. 31+21.08 as part of the Olympus Villa Plat. Add note to grind back pavement to roadway centerline so that the southern half of NE 7th Place drains to the southern curb line at 2%. No portion of NE 7th Place shall be superelevated. Revise all NE 7th Place roadway sections. 2. Move curb ramp at the intersection of NE 7th Place and Nile Avenue NE so that it matches the layout of the companion ramp across NE 7th Place. Show the perpendicular curb ramp with wings. 3. All new driveway wings shall be triangular. We are in the process of revising COR Std. Plan 104.3 to show this. Continue to reference COR Std. Plan 104.3 on the plans. 4. Add a note to the plan to remove ramps at the southern and eastern project edges. Provide a blow up detail with existing spot elevations for sidewalk and curb connections. Weston Heights North Short Plat – U16-003474 Page 3 of 6 August 17, 2016 H:\CED\Planning\Development Engineering\_Ian\2016\Utility Permit\U16-003996 Weston Heights North Short Plat\Review Comments\16-0817 Weston Heights North Utility I Comments.docx 5. Station PC and PT of roadway centerline so that transitions in the curb line can be established. 6. Provide a cross section for the trail. 7. Half street grind and overlay is required for NE 7th Place. 8. Square up grind and overlay limits as relined at the intersection of NE 7th Place Nile Avenue NE. 9. Provide postmaster approval for mailbox. 10. Add wetland perimeter fence linetype to the legend. SITE PLAN DETAILS COMMENTS – SHEET C3.1 1. Move curb ramp at the intersection of NE 7th Place and Nile Avenue NE so that it matches the layout of the companion ramp across NE 7th Place. Show the perpendicular curb ramp with wings. SITE PLAN DETAILS COMMENTS– SHEET C3.2 1. Improve legibility of COR Std. Plan 104.2. 2. We are in the process of updating COR Std. Plan 104.3. We hope to have a new detail in place prior to construction. DRAINAGE & GRADING PLAN COMMENTS – SHEET C4.0 1. There is too much space between the catch basins on NE 7th Place. Spacing between catch basins is required to meet the standards found in Section 4.2 of the 2009 KCSWDM. 2. Add a 6” perforated pipe at 0.5% minimum to the gravel trench. Provide spot elevations of the ground surface of the trench. Show how the trench is discharging to the wetland. Provide the overflow elevation. Add note on the plan to field locate the discharge point so there is a clear downstream drainage path. 3. Label IE in of new drain from the French drain on Lot 1. 4. Cleanout #1 shall be a yard drain per COR Std. Plan 225.10. 5. The rim of Yard Drain #3 appears to be incorrect. 6. Label the private roof drain collection per COR 225.10 (TYP). 7. Add a note to the plan stating that reduced impervious surface credit is proposed flow control BMP for each lot. 8. Add a note to the plan stating that the wetvault and detention pond were designed under the Weston Heights Plat Utility Permit U15-006162. Reference drawing number R-389512. Weston Heights North Short Plat – U16-003474 Page 4 of 6 August 17, 2016 H:\CED\Planning\Development Engineering\_Ian\2016\Utility Permit\U16-003996 Weston Heights North Short Plat\Review Comments\16-0817 Weston Heights North Utility I Comments.docx DRAINAGE AND GRADING PROFILE COMMENTS – SHEET C4.1 1. NE 7th Place shall not be superelevated. Adjust proposed flowline grade as necessary. 2. Adjust rim elevation for CB #1 as necessary for new flowline. 3. Show new storm drainage structures as necessary. DRAINAGE DETAILS COMMENTS – SHEET C4.2 1. Remove COR Std. Plan 224.00 – 50 Foot Dispersion Trench with Notched Board from plan if it is not being proposed as part of this permit. 2. Add any other details that will be used with the storm drain extension along NE 7th Place such as COR Std. Plan 204.20 – Rectangular Vaned Grate. DRAINAGE DETAILS COMMENTS – SHEET C4.3 1. Accurately show existing inlets and outlets to pond. Existing control structure appears to be located west of where it is drawn. See plan redlines. 2. Show pertinent existing structure elevations. 3. Show plan view of existing control structure layout. Show pipes in and out. 4. Add a note to the plan stating that the Olympus Villa Pond was designed under the Olympus Villa Plat Utility Permit U10-042. Reference drawing number R-358714. 5. Show the 6” perforated pipe in the gravel trench section detail. SEWER PLAN & DETAILS COMMENTS – SHEET C5.0 1. Show sewer cleanouts behind the sidewalk. 2. Add a note to the plan stating that sewer cleanouts behind sidewalk shall be located in 2’x2’ concrete pad adjacent to the back of walk. 3. Add COR Std. Plan 403.1 – 8” or 6” Cleanout for Sanitary Sewer Main to plan. 4. Add a note to the plan stating that Lot 1 is served by an existing on-site septic system. Lot 1 shall connect to the new sewer stub. The existing on-site septic system shall be abandoned in accordance with King County Department of Health regulations and Renton Municipal Code. 5. Add a note to the plan stating that new sewer mains in Nile Avenue NE and Private Road C were designed and permitted under the Weston Heights Plat Utility Permit U15-006162. Reference drawing number S-389501. 6. Check the image quality of the sewer PDF details shown on this sheet. The image quality is much worse than that of the storm standard plans shown on Sheet C4.2. Weston Heights North Short Plat – U16-003474 Page 5 of 6 August 17, 2016 H:\CED\Planning\Development Engineering\_Ian\2016\Utility Permit\U16-003996 Weston Heights North Short Plat\Review Comments\16-0817 Weston Heights North Utility I Comments.docx TIR COMMENTS 1. Update conveyance calculations to account for new catch basins along the southern frontage of NE 7th Place. 2. Update TIR sections as necessary per redlines. 3. Update bond quantity worksheet as necessary. STREETLIGHT PLAN COMMENTS 1. Revised lighting layout as redlined. 2. Provide updated lighting calculations. LANDSCAPE PLAN COMMENTS 1. Please submit a sign detail for the public access signs. In addition to notifying the public of the trail and noting that it is for public use, please note that the trail users should stay on the trail (so that they don’t walk into the wetland buffer enhancement area). 2. Please add the following tree protection measures to the Tree Retention Plan: Protection Measures During Construction: Protection measures in this subsection apply for all trees that are to be retained. All of the following tree protection measures shall apply: a. Construction Storage Prohibited: The applicant may not fill, excavate, stack or store equipment, dispose of any materials, supplies or fluids, operate any equipment, install impervious surfaces, or compact the earth in any way within the area defined by the drip line of any tree to be retained. b. Fenced Protection Area Required: Prior to development activities, the applicant shall erect and maintain six foot (6’) high chain link temporary construction fencing around the drip lines of all retained trees or at a distance surrounding the tree equal to one and one quarter feet (1.25’) for every one inch (1”) of trunk caliper, whichever is greater, or along the perimeter of a tree protection tract. Placards shall be placed on fencing every fifty feet (50') indicating the words, “NO TRESPASSING – Protected Trees,” or on each side of the fencing if less than fifty feet (50'). Site access to individually protected trees or groups of trees shall be fenced and signed. Individual trees shall be fenced on four (4) sides. In addition, the applicant shall provide supervision whenever equipment or trucks are moving near trees. c. Protection from Grade Changes: If the grade level adjoining to a tree to be retained is to be raised, the applicant shall construct a dry rock wall or rock well around the tree. The diameter of this wall or well must be equal to the tree’s drip line. d. Impervious Surfaces Prohibited within the Drip Line: The applicant may not install impervious surface material within the area defined by the drip line of any tree to be retained. Weston Heights North Short Plat – U16-003474 Page 6 of 6 August 17, 2016 H:\CED\Planning\Development Engineering\_Ian\2016\Utility Permit\U16-003996 Weston Heights North Short Plat\Review Comments\16-0817 Weston Heights North Utility I Comments.docx e. Restrictions on Grading within the Drip Lines of Retained Trees: The grade level around any tree to be retained may not be lowered within the greater of the following areas: (i) the area defined by the drip line of the tree, or (ii) an area around the tree equal to one and one half feet (1 1/2') in diameter for each one inch (1") of tree caliper. A larger tree protection zone based on tree size, species, soil, or other conditions may be required. (Ord. 5676, 12 3 2012) f. Mulch Layer Required: All areas within the required fencing shall be covered completely and evenly with a minimum of three inches (3") of bark mulch prior to installation of the protective fencing. Exceptions may be approved if the mulch will adversely affect protected ground cover plants. (Ord. 5676, 12 3 2012) g. Monitoring Required during Construction: The applicant shall retain a certified arborist or licensed landscape architect to ensure trees are protected from development activities and/or to prune branches and roots, fertilize, and water as appropriate for any trees and ground cover that are to be retained.