| Review Type |
Outcome |
Est. Completion Date |
Completed |
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Engineering Review
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No Comments
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10/09/2018
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Gene Williams, P.E.
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Traffic Review
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No Comments
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06/21/2018
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06/22/2018
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Michael Park
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Engineering Review
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No Comments
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06/21/2018
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06/21/2018
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Gene Williams, P.E.
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Engineering Review
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Corrections
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05/09/2018
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05/17/2018
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Gene Williams, P.E.
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Corrective Action Required
Please refer to comment #2 of the previous applicant letter dated Oct. 6, 2017 (hereinafter referred to as the applicant letter). We had requested that additional consideration be given to a different geometry for the water line which would not require future relocation of the water main. This relocation would be necessary because the City will not allow a water main to be installed beneath a box culvert. Since no consideration was given to other routes, we are assuming that the applicant is accepting of the fact that the water line must be relocated in the future. This will become a condition of approval of the plans.
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Corrective Action Required
Please refer to comment #14 contained in the previous applicant letter. Concrete encasement is required for stream crossings, and the valves should be placed 20 feet from the top of bank on either side. As shown, concrete encasement is missing, and the valves should be shown further away from the top of bank. Approximate stationing should be sta 6+70 to sta 7+80?
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Corrective Action Required
The encasement for the stream crossing discussed above should show the proposed stationing.
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Corrective Action Required
The flowline of the creek discussed in the above comment was ill-defined. Please see the profile view at the stream crossing. The linework is vague in terms of the stream bottom at this location. In accordance with the Design and Construction Manual, the top of water mains at stream crossings should be a minimum of 42 inches below the bottom of the stream bed.
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Corrective Action Required
Please refer to comment #15 contained in the previous applicant letter. A trenching and backfill detail was not provided. Please be aware that a "Trench Check" is not a trenching and backfill detail. These are only used on sanitary sewer laterals (i.e., the private sewer stubs), and not on water lines or sanitary sewer mains.
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Corrective Action Required
Please refer to comment #17 contained in the previous applicant letter. The nearest in-line valve is shown, but our records indicate this is a valve which cannot be located. It appears a new butterfly valve is required.
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Corrective Action Required
A note is provided on Sheet 2 (i.e., note 18) indicating that open-cut across Pryor Rd. may be necessary to install the water main. This connection must be bored across Pryor Rd. unless there are extenuating circumstances. Is the water line beneath pavement? Our records indicate the water line is not beneath pavement, and hence, boring will be required to make the connection. Provide sufficient notes on the plans indicating that the water line will be bored, but not cased.
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Corrective Action Required
Please refer to comment #19 of the previous applicant letter. The locations of valves should be shown in graphic format, as well as noted on the plans. A note on the plans is not sufficient. Please show the location of all valves on the plan view.
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Corrective Action Required
Please be aware that no further review of this project will take place until the off-site water line plans and the off-site sanitary sewer plans have been submitted.
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Engineering Review
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Corrections
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10/05/2017
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10/06/2017
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Gene Williams, P.E.
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Corrective Action Required
Title block on all sheets reads "Sanitary Sewer Plans". Please correct.
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Corrective Action Required
Sheet 3 of 8: The geometry of the northern loop water line connection shows the water main installed beneath the creek, with no consideration of the future box culvert. This geometry will require moving the water line in the future when the box culvert is installed. As an alternative, it may be beneficial to review a geometry that eliminates the need to move the water line in when the box culvert is installed.
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Corrective Action Required
The fire hydrant near the east end of SW 27th St. should be installed at the end of the line, as a temporary fire hydrant in-line with the water main. As shown, this fire hydrant is shown in the offset fashion.
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Corrective Action Required
The same comment applies to the fire hydrant on the north end of SW River Run Dr.
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Corrective Action Required
The same comment pertains to the fire hydrant on the east end of SW 26th Terr.
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Corrective Action Required
No fire hydrants were shown on Water Line B (i.e., on SW 26th Terr.).
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Corrective Action Required
Three (3) valves are shown at tees. Only two (2) valves are needed at tees, and the City does not want any more than two (2) valves due to maintenance issues. Please revise as appropriate throughout the plans.
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Corrective Action Required
Ductile iron pipe is specified throughout the project, but C900 should be specified except at stream crossings. Please revise as appropriate.
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Corrective Action Required
There appear to be numerous instances where the water line will exceed the minimum radius of deflection as specified by the manufacturer. Please show the locations of all bends on the water line to eliminate this issue, and to specify to the contractor where bends will be located. Please show the location of the bend, and the magnitude of the bend.
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Corrective Action Required
Please add a note stating that the minimum depth of cover over the water line is 42 inches, and the maximum depth of cover is 7 feet.
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Corrective Action Required
Sheet 4 of 8: It appears an additional gate valve is required along SW River Run Dr., perhaps near station 5+50?
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Corrective Action Required
Sheet 6 of 8: Stationing along SW 26th Terr. appeared to be missing.
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Corrective Action Required
Sheet 6 of 8: The location of the stream was not shown on the plan view.
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Corrective Action Required
Sheet 6 of 8: Ductile iron pipe with restrained joints should be specified for the stream crossing, with two (2) valves on each side of the stream to isolate the segment from the balance of the system. Valves should be located approximately 20 feet into the bank on each side of the stream. The water main should be located 42" below the natural stream bottom, and encased in concrete. Please ensure the water main is not installed with a depth of cover greater than 7 feet. The encasement should be called-out in terms of stationing.
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Corrective Action Required
A trenching and backfill detail was missing.
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Corrective Action Required
The note on Sheet 2 of 8 specifies polywrap for ductile iron pipe greater than 12 inches. This is not correct. All ductile iron pipe requires polywrap, regardless of size.
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Corrective Action Required
Please call-out the size of the water main along Pryor Rd. Show the locations of the nearest in-line valves on this line.
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Corrective Action Required
Add notes concerning the connections to the water line on Pryor Rd. Night work will be required to make this connection. A cut-in tee will also be required (i.e., not a wet tap). The maximum shut-down of the line will be no longer than 8 hours. Coordination between the City and the contractor shall be necessary to make these connections.
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Corrective Action Required
Show the locations of all new butterfly valves on the water main along Pryor Rd. Two (2) valves are required at every tee, so one (1) valve is required on the north/south leg, and one (1) valve on the east/west leg serving the subdivision.
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Corrective Action Required
Sheet 4 of 8: The water line plans at the box culvert are incomplete. No box culvert is shown in the profile view, and it is unclear where the water line will be installed in relation to it. It is for this reason that no further comments can be made at this time. Please be aware that the water line will not be allowed beneath the box culvert. If insufficient clearance is available above the box culvert, the geometry may need to be adjusted around the box culvert.
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