| Review Type |
Outcome |
Est. Completion Date |
Completed |
|
Record Drawings Review
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No Comments
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11/14/2022
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11/14/2022
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|
Gene Williams, P.E.
|
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Engineering Review
|
No Comments
|
12/17/2021
|
12/17/2021
|
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|
Karen Quackenbush
|
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Engineering Review
|
Corrections
|
12/22/2021
|
12/16/2021
|
|
|
Karen Quackenbush
|
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|
Corrective Action Required
Please see comment 3 in previous applicant letter. It will be necessary to adjust the flowline elevation of the 8" proposed main. If you take the 80% depth of the existing 18" main, you should get an elevation of 968.26'. Then that would place the 80% depth of the 8" proposed main at 967.73'. Please adjust.
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Engineering Review
|
Corrections
|
10/12/2021
|
10/12/2021
|
|
|
Gene Williams, P.E.
|
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Corrective Action Required
Please see applicant letter for the Final Plat - Napa Valley 5th. The easement between Lots 178 and 179 is too narrow. Additional easment width is necessary based on the comments provided in the applicant letter. Please revise as appropriate.
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Corrective Action Required
It appears a 14 foot deep sanitary sewer between Lots 178 and 179 is proposed, and hence, a 30 foot general utility easement is required, assuming the line is centered within the easement and an allowance for pipe width. The easement width shall be a minimum of 15 feet on each side of the lot in order to meet minimum easement widths, assuming the sanitary sewer line is centered within this overall 30 foot wide easement.
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Corrective Action Required
Please see comment 6 in previous applicant letter. The 8 inch pipe is entering the existing manhole below the the minimum elevation (it appears to be entering with the crown of the 8 inch pipe below the crown of the receiving sanitary sewer line). Please see previous comment letter for details.
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|
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|
Engineering Review
|
Corrections
|
08/16/2021
|
08/17/2021
|
|
|
Gene Williams, P.E.
|
|
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Corrective Action Required
Please remove the blue radius circles from the general layout sheet and other sheets in the plan set. It is not clear what they represent, and are distracting.
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Corrective Action Required
Sanitary sewer line A is a dead end, and the City has new standards for slope towards the end of these lines. Please see the Design and Construction Manual for specific slope requirements. It is based on the number of upstream lots at a given point. In general, 1 to 14 connections require a minimum slope of 1.00%, and 15 to 30 connections require 0.80%, while 31 or more connections requires a minimum slope of 0.60%.
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Corrective Action Required
Please label the existing manhole connection point as #60-160.
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Corrective Action Required
Sheet C.403: Storm line is too close to the sanitary sewer line. A minimum separation of 18 inches is required, unless structural support is provided between the bottom of the storm line and the top of the sanitary sewer line. It would appear the simplest solution is to raise the storm line.
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Corrective Action Required
C.404: Trenching and backfill detail shows 6 inches of aggregate on top of the pipe. Standards have changed, and this should be shown as 12 inches rather than 6 inches.
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Corrective Action Required
Connection point shows an 8 inch sanitary sewer below the crown of the existing 18 inch sanitary sewer line. Please see Design and Construction Manual for specific information regarding the incoming flowline in relation to larger pipe diameter connections. When a smaller sewer joins a large one, the invert of the larger sewer should be lowered sufficiently to maintain the same energy
gradient. An approximate method for accomplishing this is to place the 0.8 depth point of both sewers at the same elevation.
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