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HomeMy WebLinkAboutFile Documents.209 E Bleeker St.0320.2017 (204).ARBK0007.2018.ARBK_Engineering1_209 E Bleeker Page: 3 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf Is there an existing encroachment license for this gate? PlanSet.209EBleeker.2017.12.pdf (47) Page: 3 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf Show more existing grading on the survey for within the property boundary and in the ROW adjacent to Bleeker. Page: 3 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf Call out monuments, reference monument or witness to the corners at all property corners. Page: 6 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf Is the CMU retaining wall and fence property of 209 E Bleeker? It straddles the property line, verify that this development has the right to remove. Page: 6 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf Water main will need to be located prior to permit issuance to determine sawcut and patching extents. Is there an existing encroachment license for this gate? Show more existing grading on the survey for within the property boundary and in the ROW adjacent to Bleeker. Call out monuments, reference monument or witness to the corners at all property corners. Is the CMU retaining wall and fence property of 209 E Bleeker? It straddles the property line, verify that this development has the right to remove. Water main will need to be located prior to permit issuance to determine sawcut and patching extents. Page: 6 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf What extent into Bleeker St will the sawcut need to go? The joint will need to be out of the wheel path. Page: 6 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf Call out existing water service line to be abandoned at the main per COA Water Department standards vs. capped at the main. Page: 7 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf If Parks requires this to be a floating sidewalk, please call out length required for the floating sidewalk. Page: 7 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf Is curb and gutter planned to be replaced along property front? If not a C&G replacement agreement will need to be signed by property owner which COA Engineering can provide. Page: 10 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf Drainage is not permitted to be directed to alley unless there is adequate infrastructure to route runoff to the curb and gutter at the end of the alley. What extent into Bleeker St will the sawcut need to go? The joint will need to be out of the wheel path. Call out existing water service line to be abandoned at the main per COA Water Department standards vs. capped at the main. If Parks requires this to be a floating sidewalk, please call out length required for the floating sidewalk. YA R N CI TH E D E S I G N S S H O W N H E R E I N I N C L U D I N G AL L T E C H N I C A L D R A W I N G S , G R A P H I C EP R E S E N T A T I O N & M O D E L S T H E R E O F , A R E Is curb and gutter planned to be replaced along property front? If not a C&G replacement agreement will need to be signed by property owner which COA Engineering can provide. Drainage is not permitted to be directed to alley unless there is adequate infrastructure to route runoff to the curb and gutter at the end of the alley. Page: 10 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf Verify the utility and alley work will not require regrading and that the post construction conditions will match existing. Page: 10 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf Drainage report calls out the site to be raised 3', survey compared to grading sheet shows roughly 1' grade change. Clearly show where the 3' change occurs. Drainage report calls out 59% imperviousness for the site on page 9, based on the site plan it appears that more than 59% of the site is impervious, (roughly 79% imperviousness). Please revise the calculations and drainage report to reflect this. Page: 10 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf Page: 10 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf Ensure asphalt patch meets requirements of the COA Engineering Construction and Excavation standards. Page: 10 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf Is this curb proposed to protect the property from alley drainage? A curb is not required in the alley. Is this catch or spill curb? Specify Type A or type B. Verify the utility and alley work will not require regrading and that the post construction conditions will match existing. 12/08/2017 Drainage report calls out the site to be raised 3', survey compared to grading sheet shows roughly 1' grade change. Clearly show where the 3' change occurs. Drainage report calls out 59% imperviousness for the site on page 9, based on the site plan it appears that more than 59% of the site is impervious, (roughly 79% imperviousness). Please revise the calculations and drainage report to reflect this. Ensure asphalt patch meets requirements of the COA Engineering Construction and Excavation standards. Is this curb proposed to protect the property from alley drainage? A curb is not required in the alley. Is this catch or spill curb? Specify Type A or type B. Page: 10 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf With a 1.5' transition from TOW to tree well, how will runoff from the tree well be routed to the ROW and City's infrastructure? Page: 10 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf Call out more grading in this area to ensure it is constructed properly. Page: 10 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf Show spot elevations along TBOC to show 2%% slope of the buffer are Page: 10 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf How will the swale FL be maintained below the vegetation and near the window well? Swales are LID routing technique, not a WQCV treatment option. Page: 10 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf To clarify, what does FGW stand for? It is not called out in this note. Final grade of wall? With a 1.5' transition from TOW to tree well, how will runoff from the tree well be routed to the ROW and City's infrastructure? Call out more grading in this area to ensure it is constructed properly. Show spot elevations along TBOC to show 2%% slope of the buffer are How will the swale FL be maintained below the vegetation and near the window well? Swales are LID routing technique, not a WQCV treatment option. To clarify, what does FGW stand for? It is not called out in this note. Final grade of wall? Page: 10 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf What is the flow path for drainage leaving this gravel bed? Show that neighboring property is not impacted and that there is a clear drainage path to the end of the alley. Page: 10 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf No steps in the ROW per Engineering Design Standards. Page: 10 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf Swale capacity (open channel flow) calcs in the drainage report call out a slope of 0.02, should this be 2? A top width of 4 is called out, how will that be accommodated? Page: 10 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf Due to maintenance and mechanical issues that are introduced when pumps are used in a private system, Engineering prefers alternate solutions to be explored. Could a planter or gravel bed type BMP be used to treat runoff in this basin? Page: 10 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf Clearly show what grading is required to accomplish this task. Grading within the dripline of the existing trees will not be permitted What is the flow path for drainage leaving this gravel bed? Show that neighboring property is not impacted and that there is a clear drainage path to the end of the alley. No steps in the ROW per Engineering Design Standards. Swale capacity (open channel flow) calcs in the drainage report call out a slope of 0.02, should this be 2? A top width of 4 is called out, how will that be accommodated? Due to maintenance and mechanical issues that are introduced when pumps are used in a private system, Engineering prefers alternate solutions to be explored. Could a planter or gravel bed type BMP be used to treat runoff in this basin? Clearly show what grading is required to accomplish this task. Grading within the dripline of the existing trees will not be permitted Page: 11 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf Is this sized for WQCV treatment for basin 3? Calculations need to be provided. If this is intended to function as a pervious paver sub base (gravel bed) for treatment, it shall follow the the spec in the URMP. Page: 11 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf How will a 2' pan be installed in a 1.17' setback? Page: 11 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf What is the WQ treatment on basin 3? The drainage report calls out a green roof does this treat the WQCV for this basin? Runoff is only permitted to drain to alley if there is adequate conveyance to the City's infrastructure (c&g or storm inlet). Page: 11 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf Provide a cross section of what the 2' concrete pan, property line and edge of building. The grading for this needs to be determined prior to issuance of permit. Coordination with project engineer shall be done prior to building permit issuance. Page: 11 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf Show the swale for upper level of basin 3 routing. WQCV treatment is required. Is this sized for WQCV treatment for basin 3? Calculations need to be provided. If this is intended to function as a pervious paver sub base (gravel bed) for treatment, it shall follow the the spec in the URMP. How will a 2' pan be installed in a 1.17' setback? What is the WQ treatment on basin 3? The drainage report calls out a green roof does this treat the WQCV for this basin? Runoff is only permitted to drain to alley if there is adequate conveyance to the City's infrastructure (c&g or storm inlet). Provide a cross section of what the 2' concrete pan, property line and edge of building. The grading for this needs to be determined prior to issuance of permit. Coordination with project engineer shall be done prior to building permit issuance. Show the swale for upper level of basin 3 routing. WQCV treatment is required. Page: 11 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf Can pervious pavers be used onsite to reduce impervious area and treat WQCV? Page: 11 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf Westerly property limit not easterly. Page: 11 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf Tree wells are not an approved WQCV technique per the COA URMP. Please provide a design that incorporates a BMP outlined in Chapter 8 of the URMP or demonstrate how all of those options cannot be used on this site. Page: 11 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf What is the WQCV treatment in basin 4? Drainage report calls out that runoff drains to Bleeker St, required WQCV treatment first. Page: 11 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf This storm line was sized at 100% full, per the URMP it shall be sized for 80% full conditions to determine diameter. In this case the size of the pipe is adequate but for future reference please use 80%. Can pervious pavers be used onsite to reduce impervious area and treat WQCV? Westerly property limit not easterly. B Tree wells are not an approved WQCV technique per the COA URMP. Please provide a design that incorporates a BMP outlined in Chapter 8 of the URMP or demonstrate how all of those options cannot be used on this site. What is the WQCV treatment in basin 4? Drainage report calls out that runoff drains to Bleeker St, required WQCV treatment first. This storm line was sized at 100% full, per the URMP it shall be sized for 80% full conditions to determine diameter. In this case the size of the pipe is adequate but for future reference please use 80%. Page: 11 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf If the green roof is treating WQCV for basin 3 provide cals for sizing per URMP. Provide a detail to ensure treatment is met. Page: 11 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf Drainage report calls out under section 1.7 that Lot B also may contribute offsite drainage to 209 E Bleeker, show this in the basin delineation. Page: 13 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf This needs to be worked out prior to issuance of permit, all exterior routing shall be shown on the utlitity plan. Any in field changes will require a change order. Page: 13 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf Is one water service line to serve both buildings? Water Department recommends one service line per residence to prevent future access and maintenance issues with separate owners. Page: 13 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf How will the force main be installed so close to the property? What is preventing the force main from eroding the soils inside the retaining wall? If the green roof is treating WQCV for basin 3 provide cals for sizing per URMP. Provide a detail to ensure treatment is met. Drainage report calls out under section 1.7 that Lot B also may contribute offsite drainage to 209 E Bleeker, show this in the basin delineation. This needs to be worked out prior to issuance of permit, all exterior routing shall be shown on the utlitity plan. Any in field changes will require a change order. Is one water service line to serve both buildings? Water Department recommends one service line per residence to prevent future access and maintenance issues with separate owners. How will the force main be installed so close to the property? What is preventing the force main from eroding the soils inside the retaining wall? Page: 13 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf How does the water service line connect to the mechanical room? It appears that an uncontrolled line will be routed through the interior of the building prior to reaching the mechanical room in the basement. Page: 13 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf Provide fire flow calculations that support that a 4" water service line is needed. Residential properties typically require a 1.5" or 2" lines at max. Page: 13 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf How will the 90 degree vertical bend be kept clean of debris build up? Page: 13 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf Since extensive alley and utility work is required for this property can the cable and telephone connections be installed without the added infrastructure of a splice vault and to limit future conflicts and needs for this alley? The routing currently shown does not appear to be the most efficient use of the ROW. Page: 14 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf How will the foundation drain be installed with out impacting neighboring property? How does the water service line connect to the mechanical room? It appears that an uncontrolled line will be routed through the interior of the building prior to reaching the mechanical room in the basement. Provide fire flow calculations that support that a 4" water service line is needed. Residential properties typically require a 1.5" or 2" lines at max. How will the 90 degree vertical bend be kept clean of debris build up? Since extensive alley and utility work is required for this property can the cable and telephone connections be installed without the added infrastructure of a splice vault and to limit future conflicts and needs for this alley? The routing currently shown does not appear to be the most efficient use of the ROW. How will the foundation drain be installed with out impacting neighboring property? Page: 16 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf Provide a swale detail for both swales onsite. Page: 101 Author: pjm File Name: PlanSet.209EBleeker.2017.12.pdf Snowmelt in ROW shall be on a separate zone. Provide a swale detail for both swales onsite. VER CONCRETE- ELT; RE: 6/L.5.01 ARDEN Snowmelt in ROW shall be on a separate zone.