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HomeMy WebLinkAboutP_Civil_Construction_Plans_Bilti_181128_v1_SummaryP_Civil_Construction_Plans_Bilti_181128_v1.pdf Markup Summary Subject: Cloud+ Page Label: 1 Date: 12/5/2018 5:43:08 PM Status: Color: Layer: Space: unable to find the ties to the renton control monuments in the construction portion of the plan set. They are shown on the topographic survey from 2007, but unable to confirm bearings and distances for construction set. 1 (5) Subject: Callout Page Label: 1 Date: 12/5/2018 7:36:06 AM Status: Color: Layer: Space: NOTE THESE NUMBERS TO BE INPUT ON THE COR TITLE BLOCK. SEE TITLE BLOCK EXAMPLE SHEET PROVIDED Subject: Text Box Page Label: 1 Date: 12/5/2018 7:37:33 AM Status: Color: Layer: Space: TED-40-4040 Subject: Text Box Page Label: 1 Date: 12/5/2018 7:39:10 AM Status: Color: Layer: Space: R-404001 Subject: Callout Page Label: 1 Date: 12/5/2018 7:46:44 AM Status: Color: Layer: Space: NOTE THESE NUMBERS TO BE INPUT ON THE COR TITLE BLOCK. SEE TITLE BLOCK EXAMPLE SHEET PROVIDED Subject: Text Box Page Label: 2 Date: 1/2/2019 1:35:08 PM Status: Color: Layer: Space: provide horizontal control plan 2 (3) unable to find theties to the rentoncontrol monumentsin the constructionportion of the planset. They are shownon the topographicsurvey from 2007,but unable toconfirm bearingsand distances forconstruction set. NOTE THESE NUMBERSTO BE INPUT ON THECOR TITLE BLOCK. SEETITLE BLOCK EXAMPLESHEET PROVIDED TED-40-4040R-404001 NOTE THESE NUMBERSTO BE INPUT ON THECOR TITLE BLOCK. SEETITLE BLOCK EXAMPLESHEET PROVIDED provide horizontal control plan Subject: Text Box Page Label: 2 Date: 12/5/2018 7:37:36 AM Status: Color: Layer: Space: TED-40-4040 Subject: Text Box Page Label: 2 Date: 12/5/2018 7:39:26 AM Status: Color: Layer: Space: R-404002 Subject: Callout Page Label: 3 Date: 1/4/2019 10:21:30 AM Status: Color: Layer: Space: Use CIty's updated erosion control notes found on Surface Water Standard Plan 268.00. 3 (3) Subject: Text Box Page Label: 3 Date: 12/5/2018 7:37:36 AM Status: Color: Layer: Space: TED-40-4040 Subject: Text Box Page Label: 3 Date: 12/5/2018 7:39:31 AM Status: Color: Layer: Space: R-404003 Subject: Callout Page Label: 4 Date: 1/4/2019 12:19:11 PM Status: Color: Layer: Space: Must be removed by developer after construction is complete 4 (4) Subject: Text Box Page Label: 4 Date: 12/31/2018 1:31:42 PM Status: Color: Layer: Space: update all details to current details.TED-40-4040R-404002 Use CIty's updated erosion control notes foundon Surface Water Standard Plan 268.00.TED-40-4040R-404003 Must be removed bydeveloper afterconstruction iscomplete update all details to currentdetails. Subject: Text Box Page Label: 4 Date: 12/5/2018 7:37:36 AM Status: Color: Layer: Space: TED-40-4040 Subject: Text Box Page Label: 4 Date: 12/5/2018 7:39:42 AM Status: Color: Layer: Space: R-404004 Subject: Text Box Page Label: 5 Date: 1/2/2019 4:11:20 PM Status: Color: Layer: Space: provide composite utility plan showing location of all proposed utilities. 5 (21) Subject: Callout Page Label: 5 Date: 1/2/2019 4:13:42 PM Status: Color: Layer: Space: provide triangular wings at driveway entrance. Subject: Callout Page Label: 5 Date: 1/2/2019 4:14:26 PM Status: Color: Layer: Space: 1.5% Subject: Callout Page Label: 5 Date: 1/3/2019 10:13:14 AM Status: Color: Layer: Space: Private Subject: Callout Page Label: 5 Date: 1/3/2019 10:19:46 AM Status: Color: Layer: Space: PrivateTED-40-4040R-404004 provide composite utility plan showinglocation of all proposed utilities. provide triangularwings at drivewayentrance. 1.5% Private Private Subject: Callout Page Label: 5 Date: 1/3/2019 10:20:00 AM Status: Color: Layer: Space: Private Subject: Callout Page Label: 5 Date: 1/3/2019 10:20:25 AM Status: Color: Layer: Space: Private Subject: Callout Page Label: 5 Date: 1/4/2019 1:04:36 PM Status: Color: Layer: Space: Label these structures. (TYP.) Subject: Callout Page Label: 5 Date: 1/4/2019 11:35:56 AM Status: Color: Layer: Space: Label roof drain collector pipes. Ensure pipes are 6" dia min, and have 0.5% min slope, and have 2' min cover. (TYP.) Subject: Callout Page Label: 5 Date: 1/4/2019 11:54:44 AM Status: Color: Layer: Space: Provide minimum 5' setback between cleanout and lot line. (TYP.) Subject: Callout Page Label: 5 Date: 1/4/2019 11:56:39 AM Status: Color: Layer: Space: Add arrows on all storm pipes to show flow direction. (TYP.) Subject: Callout Page Label: 5 Date: 1/4/2019 12:23:38 PM Status: Color: Layer: Space: eliminate this cb Private Private Label these structures. (TYP.) Label roof drain collector pipes.Ensure pipes are 6" dia min, and have 0.5%min slope, and have 2' min cover. (TYP.) Provide minimum 5' setbackbetween cleanout and lotline. (TYP.) Add arrows on allstorm pipes to showflow direction. (TYP.) eliminate this cb Subject: Callout Page Label: 5 Date: 1/4/2019 12:25:45 PM Status: Color: Layer: Space: Solid Locking Lid If Not Collecting Water Subject: Cloud+ Page Label: 5 Date: 1/7/2019 1:38:22 PM Status: Color: Layer: Space: The City of Kent approval is required for the storm improvements in SE 192nd Street, prior to City approval of construction plans - There is an existing storm system in SE 192nd Street Subject: Text Box Page Label: 5 Date: 1/7/2019 2:41:54 PM Status: Color: Layer: Space: Access openings shall be placed so no location within the vault is more than 50' away from an access opening. Subject: Callout Page Label: 5 Date: 1/7/2019 3:49:57 PM Status: Color: Layer: Space: Provide a minimum 5'x5' vented grate over cell #2 outside of curb line. Subject: Callout Page Label: 5 Date: 1/7/2019 3:50:56 PM Status: Color: Layer: Space: Provide a minimum 5'x5' vented grate over cell #3 outside of roadway. Subject: Callout Page Label: 5 Date: 1/7/2019 3:59:46 PM Status: Color: Layer: Space: Ensure access road provides access to at least one access point in each cell. Subject: Length Measurement Page Label: 5 Date: 12/17/2018 1:28:57 PM Status: Color: Layer: Space: 20'-3" Solid Locking Lid IfNot CollectingWater The City of Kentapproval is requiredfor the stormimprovements in SE192nd Street, priorto City approval ofconstruction plans -There is an existingstorm system in SE192nd Street Access openings shall be placed so nolocation within the vault is more than50' away from an access opening. Provide a minimum 5'x5' vented grateover cell #2 outside of curb line. Provide a minimum 5'x5' vented grateover cell #3 outside of roadway. Ensure access roadprovides access to atleast one accesspoint in each cell. 20'-3" Subject: Text Box Page Label: 5 Date: 12/5/2018 7:37:36 AM Status: Color: Layer: Space: TED-40-4040 Subject: Text Box Page Label: 5 Date: 12/5/2018 7:39:48 AM Status: Color: Layer: Space: R-404005 Subject: Callout Page Label: 6 Date: 1/2/2019 1:45:39 PM Status: Color: Layer: Space: 1.5% 6 (6) Subject: Callout Page Label: 6 Date: 1/2/2019 3:07:16 PM Status: Color: Layer: Space: provide prior to permit issuance Subject: Callout Page Label: 6 Date: 1/4/2019 10:24:21 AM Status: Color: Layer: Space: Use City's updated Surface Water Standard notes found on Surface Water Standard Plans 267.00 and 267.10. Subject: Callout Page Label: 6 Date: 12/31/2018 1:43:56 PM Status: Color: Layer: Space: replace surface water notes with standard details. Subject: Text Box Page Label: 6 Date: 12/5/2018 7:37:36 AM Status: Color: Layer: Space: TED-40-4040TED-40-4040R-404005 1.5% provide prior topermit issuance Use City's updated Surface WaterStandard notes found on Surface WaterStandard Plans 267.00 and 267.10. replace surfacewater notes withstandard details.TED-40-4040 Subject: Text Box Page Label: 6 Date: 12/5/2018 7:39:54 AM Status: Color: Layer: Space: R-404006 Subject: Callout Page Label: 7 Date: 1/2/2019 4:10:31 PM Status: Color: Layer: Space: need to have a minimum of 12 inch ventilation pipes at all 4 corners of the vault. 7 (21) Subject: Callout Page Label: 7 Date: 1/2/2019 7:48:02 AM Status: Color: Layer: Space: Per section 6.4.4.2 The Minimum sediment storage depth in the first cell shall average 1 foot. Subject: Callout Page Label: 7 Date: 1/2/2019 7:54:29 AM Status: Color: Layer: Space: provide elevation. Subject: Callout Page Label: 7 Date: 1/2/2019 7:55:37 AM Status: Color: Layer: Space: specify pipe size Subject: Text Box Page Label: 7 Date: 1/4/2019 10:51:34 AM Status: Color: Layer: Space: Update to current City of Renton Surface Water Standard Plans. Subject: Callout Page Label: 7 Date: 1/7/2019 1:49:18 PM Status: Color: Layer: Space: Notch connecting cell #3 to Cell #4 invert elevation needs to match wetpool elevation of 504.60 R-404006 need to have a minimumof 12 inch ventilationpipes at all 4 cornersof the vault. Per section 6.4.4.2The Minimum sedimentstorage depth in thefirst cell shallaverage 1 foot. provide elevation. specify pipe size Update to current City of RentonSurface Water Standard Plans. Notch connectingcell #3 to Cell #4invert elevationneeds to matchwetpool elevation of504.60 Subject: Cloud+ Page Label: 7 Date: 1/7/2019 1:50:32 PM Status: Color: Layer: Space: Check elevation should be 503.41? Subject: Text Box Page Label: 7 Date: 1/7/2019 10:00:22 AM Status: Color: Layer: Space: Access openings shall be placed so no location within the vault is more than 50' away from an access opening. Subject: Callout Page Label: 7 Date: 1/7/2019 10:02:48 AM Status: Color: Layer: Space: Also install ventilation pipes at these two "corners" created by the wall. Subject: Callout Page Label: 7 Date: 1/7/2019 12:56:57 PM Status: Color: Layer: Space: 5'x10' Removable locking solid panel with traffic bearing lid Subject: Callout Page Label: 7 Date: 1/7/2019 3:35:37 PM Status: Color: Layer: Space: Provide and call out an average sediment storage of 1 foot for cell #1. Subject: Callout Page Label: 7 Date: 1/7/2019 3:36:24 PM Status: Color: Layer: Space: Provide and call out an average sediment storage of 6 inches for cell #2. Subject: Callout Page Label: 7 Date: 1/7/2019 3:37:01 PM Status: Color: Layer: Space: Provide and call out an average sediment storage of 6 inches for cell #3. Check elevation should be 503.41? Access openings shall be placed so nolocation within the vault is more than50' away from an access opening. Also install ventilation pipes at thesetwo "corners" created by the wall. 5'x10' Removable locking solidpanel with traffic bearing lid Provide and call outan average sedimentstorage of 1 foot forcell #1. Provide and call outan average sedimentstorage of 6 inchesfor cell #2. Provide and call outan average sedimentstorage of 6 inchesfor cell #3. Subject: Callout Page Label: 7 Date: 1/7/2019 3:42:27 PM Status: Color: Layer: Space: removable Subject: Callout Page Label: 7 Date: 1/7/2019 3:42:34 PM Status: Color: Layer: Space: removable Subject: Callout Page Label: 7 Date: 1/7/2019 3:47:36 PM Status: Color: Layer: Space: Provide a minimum 5'x5' vented grate over cell #2 outside of curb line. Subject: Callout Page Label: 7 Date: 1/7/2019 3:48:08 PM Status: Color: Layer: Space: Provide a minimum 5'x5' vented grate over cell #3 outside of curb line. Subject: Callout Page Label: 7 Date: 12/31/2018 2:10:15 PM Status: Color: Layer: Space: recommend adjusting elevations to allow for more than 0.5. field constructibility will make it this elevation difficult to achieve. Subject: Callout Page Label: 7 Date: 12/31/2018 3:13:39 PM Status: Color: Layer: Space: Elevation difference is 5.56 feet Subject: Text Box Page Label: 7 Date: 12/5/2018 7:37:36 AM Status: Color: Layer: Space: TED-40-4040 removable removable Provide a minimum 5'x5' vented grateover cell #2 outside of curb line. Provide a minimum 5'x5' vented grateover cell #3 outside of curb line. recommend adjustingelevations to allowfor more than 0.5.field constructibilitywill make it thiselevation difficult toachieve. Elevation differenceis 5.56 feet TED-40-4040 Subject: Text Box Page Label: 7 Date: 12/5/2018 7:40:02 AM Status: Color: Layer: Space: R-404007 Subject: Text Box Page Label: 8 Date: 1/4/2019 10:51:43 AM Status: Color: Layer: Space: Update to current City of Renton Surface Water Standard Plans. 8 (4) Subject: Callout Page Label: 8 Date: 1/4/2019 12:29:03 PM Status: Color: Layer: Space: no city of renton logo in private syatem Subject: Text Box Page Label: 8 Date: 12/5/2018 7:37:36 AM Status: Color: Layer: Space: TED-40-4040 Subject: Text Box Page Label: 8 Date: 12/5/2018 7:40:12 AM Status: Color: Layer: Space: R-404008 Subject: Text Box Page Label: 9 Date: 1/2/2019 2:36:40 PM Status: Color: Layer: Space: update all details to current details. 9 (3) Subject: Text Box Page Label: 9 Date: 12/5/2018 7:37:36 AM Status: Color: Layer: Space: TED-40-4040 R-404007 Update to current City of RentonSurface Water Standard Plans. no city of rentonlogo in private syatem TED-40-4040R-404008 update all details to current details.TED-40-4040 Subject: Text Box Page Label: 9 Date: 12/5/2018 7:40:21 AM Status: Color: Layer: Space: R-404009 Subject: Text Box Page Label: 10 Date: 12/5/2018 7:37:36 AM Status: Color: Layer: Space: TED-40-4040 10 (2) Subject: Text Box Page Label: 10 Date: 12/5/2018 7:40:26 AM Status: Color: Layer: Space: R-404010 Subject: Callout Page Label: 11 Date: 1/2/2019 3:09:16 PM Status: Color: Layer: Space: adjust sheet index 11 (3) Subject: Text Box Page Label: 11 Date: 12/5/2018 7:37:36 AM Status: Color: Layer: Space: TED-40-4040 Subject: Text Box Page Label: 11 Date: 12/5/2018 7:40:35 AM Status: Color: Layer: Space: R-404011 Subject: Text Box Page Label: 12 Date: 12/5/2018 7:40:58 AM Status: Color: Layer: Space: TED-40-4040 12 (2) R-404009 TED-40-4040R-404010 SHORT PLAT adjust sheet index 7ÄTED-40-4040ENTON STANDARDS R-404011 TED-40-4040 Subject: Text Box Page Label: 12 Date: 12/5/2018 7:41:28 AM Status: Color: Layer: Space: R-404012 Subject: Cloud+ Page Label: 15 Date: 1/3/2019 8:35:59 AM Status: Color: Layer: Space: parcel 15 (1) Subject: Callout Page Label: 28 Date: 1/4/2019 10:47:59 AM Status: Color: Layer: Space: The public storm systems identified by the utility permit plans within the Kent city limits will be maintained by the City of Kent. The private storm systems located within the private drainage easement or Tract A will be maintained by the homeowner's association. 28 (4) Subject: Cloud+ Page Label: 28 Date: 1/4/2019 10:48:15 AM Status: Color: Layer: Space: within private lots Subject: Callout Page Label: 28 Date: 1/4/2019 10:48:37 AM Status: Color: Layer: Space: within the Renton city limits Subject: Cloud+ Page Label: 28 Date: 1/7/2019 1:12:23 PM Status: Color: Layer: Space: The stormwater vault will be owned and maintained by the homeowner's association. Subject: Callout Page Label: 52 Date: 1/7/2019 4:18:08 PM Status: Color: Layer: Space: Ensure assumptions and calculations comply with requirements within section C.2.9 of the manual. 52 (1) R-404012 ill be retained after on of the project to ll be reviewed for he City of Renton orner to provide storm cross a particle to the tch on SE 192nd Street. nd sewer services. oject tom the west. d to be Alderwood parcel Core Requirement #6: Maintenance and Operations The utility permit plans have identified the public and private storm systems on the project. The stormwater vault will be owned by the homeowner’s association. The maintenance and operation of the internal portion of the stormwater vault will be provide by the City of Renton. The public storm systems identified by the utility permit plans will be maintained by the City of Renton. The private storm systems located on private property will be maintained by the individual home owner. TIR Section 10 of this Report provides routine maintenance requirements for the new facilities on this project. Core Requirement # 7: Financial Guarantees and Liability Financial Guarantees and Liabilities will be provided to the City of Renton as part of the issuance of the utility construction permit to construct the flow control facilities, storm conveyance systems, erosion control measures, and road improvements. A Bond Quantity worksheet has been provided within TIR Section 9 to provide support information to the City of Renton to determine financial requirements for bonds, fees, and sureties. Core Requirement No. 8 – Water Quality The subject project is required to provide water quality treatment. The water quality sizing is provided within TIR Section 4 of this Report. The water quality (dead storage) and sedimentation will be provided in the lower portion of the proposed stormwater vault. Section 1.3 Special Requirements Special Requirement #1: Other Adopted Area-Specific Requirements This project is not in a designated area included in an adopted master drainage plan, basin plan, salmon conservation plan, stormwater compliance plan, flood hazard reduction plan, or shared facilities drainage plan as identified under the City of Renton amendments to the King County Surface Water Design Manual dated February 2010. The public storm systems identified by the utility permit plans within the Kent city limitswill be maintained by the City of Kent. The private storm systems located within theprivate drainage easement or Tract A will be maintained by the homeowner's association. uirement #6: Maintenance and Operations utility permit plans have identified the public and private storm systems on the project stormwater vault will be owned by the homeowner’s association. The maintenance operation of the internal portion of the stormwater vault will be provide by the City of ton. The public storm systems identified by the utility permit plans will be maintained he City of Renton. The private storm systems located on private property will be ntained by the individual home owner. TIR Section 10 of this Report provides routine ntenance requirements for the new facilities on this project. uirement # 7: Financial Guarantees and Liability ancial Guarantees and Liabilities will be provided to the City of Renton as part of the ance of the utility construction permit to construct the flow control facilities, storm veyance systems, erosion control measures, and road improvements. ond Quantity worksheet has been provided within TIR Section 9 to provide support within private lots ons c and private storm systems on the project. eowner’s association. The maintenance mwater vault will be provide by the City of the utility permit plans will be maintained ms located on private property will be Section 10 of this Report provides routine on this project. d Liability ded to the City of Renton as part of the nstruct the flow control facilities, storm and road improvements. within the Renton city limits Core Requirement #6: Maintenance and Operations The utility permit plans have identified the public and private storm systems on the project. The stormwater vault will be owned by the homeowner’s association. The maintenance and operation of the internal portion of the stormwater vault will be provide by the City of Renton. The public storm systems identified by the utility permit plans will be maintained by the City of Renton. The private storm systems located on private property will be maintained by the individual home owner. TIR Section 10 of this Report provides routine maintenance requirements for the new facilities on this project. Core Requirement # 7: Financial Guarantees and Liability Financial Guarantees and Liabilities will be provided to the City of Renton as part of the issuance of the utility construction permit to construct the flow control facilities, storm conveyance systems, erosion control measures, and road improvements. A Bond Quantity worksheet has been provided within TIR Section 9 to provide support information to the City of Renton to determine financial requirements for bonds, fees, and sureties. Core Requirement No. 8 – Water Quality The subject project is required to provide water quality treatment. The water quality sizing The stormwater vault will beowned and maintained by thehomeowner's association. 1022 acres) acres) es) ed impervious surface BMP: feet feet feet feet .2388 acres) 034 acres) es) ) Ensure assumptionsand calculationscomply withrequirements withinsection C.2.9 of themanual. Subject: Text Box Page Label: 57 Date: 1/4/2019 2:35:11 PM Status: Color: Layer: Space: Include full model report in appendix. 57 (1) Subject: Text Box Page Label: 65 Date: 1/2/2019 7:50:00 AM Status: Color: Layer: Space: elevations listed above differ from the elevations on the plan set. 65 (7) Subject: Callout Page Label: 65 Date: 1/4/2019 10:03:30 AM Status: Color: Layer: Space: Infiltration/permeability rate is not provided in geotech reports. Subject: Callout Page Label: 65 Date: 1/4/2019 10:04:24 AM Status: Color: Layer: Space: This soil description does not match geotech reports, which define soil as silty sands with gravel, not fine loamy sands or alderwood soils. Subject: Callout Page Label: 65 Date: 1/4/2019 10:05:46 AM Status: Color: Layer: Space: No groundwater was present in attached geotech reports. Subject: Callout Page Label: 65 Date: 1/4/2019 10:17:18 AM Status: Color: Layer: Space: Assess feasibility of soil amendment. Subject: Cloud+ Page Label: 65 Date: 1/4/2019 9:20:39 AM Status: Color: Layer: Space: Basic Include full model report in appendix. gations have been account for and shown. oject area breakdown, the KCRTS model was used to compute the existing from the project. To meet the performance standard and allow for the ge, the storm water detention volume was calculated at 10,692 cubic feet. ithin the active (detention) portion) is 509.30’ overflow – 504.90’ outlet The detention portion of the vault would be 108’ x 22.50’ (wide) x 4.40’ 0,692 cubic feet. The proposed vault is adequately sized for flow control fo ment. elevations listed above differ from theelevations on the plan set. n Drainage Manual, the following steps are required to determine the off of the developed project: G (no good) – The property does not have adequate flow path l dispersion; G – The soils have been classified by the Geotechnical Engineer as h a low permeability rate; Alderwood Series soils w/ high ground soils are not adequate for full infiltration per the Drainage Manual. neer does not recommend infiltration or retention of onsite runoff d water table and poor draining soils. – N/G- With the presents of a high ground water table, the use of t recommended by the geotechnical Engineer or allowed by the City – N/G – The soils, the high ground water table and the lack of Infiltration/permeability rate isnot provided in geotech reports. Flow Control System (Part D): Based upon the City of Renton Drainage Manual, the following steps are required to determine the mitigation of storm water runoff of the developed project: Full Dispersion – N/G (no good) – The property does not have adequate flow path lengths to allow for full dispersion; Full Infiltration – N/G – The soils have been classified by the Geotechnical Engineer as “fine loamy sands” with a low permeability rate; Alderwood Series soils w/ high ground water present. These soils are not adequate for full infiltration per the Drainage Manual. The Geotechnical Engineer does not recommend infiltration or retention of onsite runoff due to the high ground water table and poor draining soils. Limited Infiltration – N/G- With the presents of a high ground water table, the use of infiltration BMP’s is not recommended by the geotechnical Engineer or allowed by the City manual. Limited Dispersion – N/G – The soils, the high ground water table and the lack of available flow path do not allow for these types of BMP’s. Perforated Pipe Connection – This BMP will be used on the lots as each house connects to the onsite stormwater facility. The project will be sized for a storm water facility (vault) to provide runoff control. The facility izing calculations can be found attached to this section. The existing historic conditions of the site are required to be analyzed as “Forested Site Conditions” Developed Project Area breakdown has been attached to indicate the developed conditions of the project after BMP mitigations have been account for and shown. From the developed project area breakdown, the KCRTS model was used to compute the existing and developed runoffs from the project. To meet the performance standard and allow for the This soil description does not match geotech reports, which define soilas silty sands with gravel, not fine loamy sands or alderwood soils. s not have adequate flow path d by the Geotechnical Engineer as wood Series soils w/ high ground filtration per the Drainage Manual. ation or retention of onsite runoff soils. gh ground water table, the use of ical Engineer or allowed by the City nd water table and the lack of P’s. d on the lots as each house connects ovide runoff control. The facility No groundwaterwas present inattached geotechreports. Limited Infiltration – N/G- With the presents of a high g infiltration BMP’s is not recommended by the geotechnical manual. Limited Dispersion – N/G – The soils, the high ground w available flow path do not allow for these types of BMP’s. Perforated Pipe Connection – This BMP will be used on to the onsite stormwater facility. The project will be sized for a storm water facility (vault) to provid sizing calculations can be found attached to this section. The existing historic conditions of the site are required to be analy Conditions” Developed Project Area breakdown has been attached to indicate project after BMP mitigations have been account for and shown. From the developed project area breakdown, the KCRTS model wa Assess feasibility of soil amendment. The Geotechnica due to the high Limited Infiltr infiltration BMP’ manual. Limited Dispe available flow p Perforated Pip to the onsite sto The project will be size Basic Subject: Text Box Page Label: 65 Date: 1/8/2019 8:31:03 AM Status: Color: Layer: Space: State that lot development will utilize reduced impervious surface credit. Ensure assumptions and calculations comply with requirements within section C.2.9 of the manual. For the lots, any recorded limit on total impervious surface less than a norm of 4,000 sf or the maximum allowed by the lot's zoning, whichever is smaller, qualifies for a restricted footprint credit equal to the difference in sf. Must provide covenant that states restricted impervious area amount for each lot. Subject: Callout Page Label: 68 Date: 1/2/2019 11:54:57 AM Status: Color: Layer: Space: plans show sediment volume of 94.09 cubic feet. 68 (6) Subject: Text Box Page Label: 68 Date: 1/2/2019 11:57:21 AM Status: Color: Layer: Space: dimensions from the plan set give a west cross section of 1.575 sq ft and at the east end 1.18125 sq ft with a rectangular section of 3.2625 sq ft. Subject: Text Box Page Label: 68 Date: 1/2/2019 11:59:21 AM Status: Color: Layer: Space: 15' x [((1.575 sq ft + 1.18125 sq ft) / 2) + 3.2625 sq ft] = 48.9375 cubic feet Subject: Text Box Page Label: 68 Date: 1/2/2019 3:42:05 PM Status: Color: Layer: Space: recommend lowering the bottom elevation in order to achieve required depth. Subject: Callout Page Label: 68 Date: 1/2/2019 4:07:41 PM Status: Color: Layer: Space: please revise the elevations to match the plans and developed runoffs from the project. To meet the performance standard and allow for the bypass area to discharge, the storm water detention volume was calculated at 10,692 cubic feet. The proposed vault (within the active (detention) portion) is 509.30’ overflow – 504.90’ outlet (4.40’ active storage). The detention portion of the vault would be 108’ x 22.50’ (wide) x 4.40’ deep (detention) OR 10,692 cubic feet. The proposed vault is adequately sized for flow control for the proposed development. State that lot development will utilize reduced impervious surfacecredit. Ensure assumptions and calculations comply with requirementswithin section C.2.9 of the manual. For the lots, any recorded limit ontotal impervious surface less than a norm of 4,000 sf or the maximumallowed by the lot's zoning, whichever is smaller, qualifies for arestricted footprint credit equal to the difference in sf. Must providecovenant that states restricted impervious area amount for each lot. Calculation o 15’*(13.725+ Cell #1 contains an Remainder of vault (Cell #2 plans show sedimentvolume of 94.09 cubicfeet. 5’ * 15’ = 168.75 cubic feet of q. feet feet OKAY ev. 500.90 ment storage dimensions fromthe plan set give awest cross sectionof 1.575 sq ft andat the east end1.18125 sq ft witha rectangularsection of 3.2625sq ft. lculate average sediment volume for 12”: 12” (1’) * 11.25’ * 15’ = 168.75 cubic feet of orage to obtain 12” average sediment storage ovided sediment volume within Cell #1: Cross sectional area at west end of Cell #1: 13.725 sq. feet Cross sectional area at east end of Cell #1: 12.82 sq. feet Calculation of provided sediment volume in Cell #1: 15’*(13.725+12.82)/2 = 199.09 cubic feet > 168.75 OKAY ll #1 contains an average of 12” of sediment storage @ elev. 500.90 r of vault (Cell #2 and Cell #3) will have 6” (0.5’) of sediment storage 15' x [((1.575 sq ft + 1.18125 sq ft) / 2) + 3.2625 sq ft] =48.9375 cubic feet Cross sectional area at west end of Cell #1: 13.725 sq. feet Cross sectional area at east end of Cell #1: 12.82 sq. feet Calculation of provided sediment volume in Cell #1: 15’*(13.725+12.82)/2 = 199.09 cubic feet > 168.75 OKAY Cell #1 contains an average of 12” of sediment storage @ elev. 500.90 Remainder of vault (Cell #2 and Cell #3) will have 6” (0.5’) of sediment storage recommend lowering the bottom elevation in order to achieve requireddepth. sq. feet eet s: quare feet of new PGIS (6,250 sq. feet proposed ed driveways. Therefore, water quality treatment is ater quality volume are attached to this section. The et of dead storage. The northerly half of the vault will he first portion of this area will be Cell #1. Cell #1 water quality. 5’ wide x 15’ long x (504.90-500.90) – volume 33.12%<35% OKAY please revise the elevations tomatch the plans Subject: Callout Page Label: 68 Date: 1/7/2019 1:14:56 PM Status: Color: Layer: Space: West x-section = Rectangle + Triangle = 11.25*(499.04-498.75) + 0.5*11.25*(498.75-498.47) = 3.2625 + 1.575 = 4.8375 SF EAst x-section = Rectangle + Triangle = 11.25*(499.04-498.82) + 0.5*11.25*(498.82-498.54) = 2.475 + 1.575 = 4.05 SF Average x-section = 0.5 * (4.8375+4.05) = 4.44375 SF First Cell Volume = 15' * 4.44375 SF = 66.66 CF First cell sediment storage volume is deficient. Subject: Text Box Page Label: 100 Date: 1/2/2019 12:11:23 PM Status: Color: Layer: Space: update to new form on city's website 100 (1) y half of the vault will be Cell #1. Cell #1 0.90) – volume 75 cu. feet = 168.75 cubic feet of 90 age West x-section = Rectangle + Triangle =11.25*(499.04-498.75) + 0.5*11.25*(498.75-498.47) =3.2625 + 1.575 = 4.8375 SFEAst x-section = Rectangle + Triangle =11.25*(499.04-498.82) + 0.5*11.25*(498.82-498.54) =2.475 + 1.575 = 4.05 SF Average x-section = 0.5 * (4.8375+4.05) = 4.44375 SFFirst Cell Volume = 15' * 4.44375 SF = 66.66 CF First cell sediment storage volume is deficient. 7 ON OF COVENANT AND EASEMENT FOR INSPECTION update to new form on city's website