Lee's Summit

Please label the existing City manhole 14-043 on Jones Industrial Dr. (i.e., the manhole being utilized as the receiving manhole for the new alignment). This is needed for our GIS technicians to update the GIS maps.

Sheet 411: The scale does not appear accurate. Please evaluate and revise as appropriate.

Manhole AA4 and AA2 shall be designed with a minimum 0.50 feet fall between the incoming pipe and the outgoing pipe for deflection angles greater than 45 degrees. Please revise as appropriate, but please keep the 1.0% slope as a minimum for this line at all locations.

Please provide the wall thickness of the casing pipe on the plans. In addition, please show the location of the casing pipe in graphical format on the profile view, with clear indications of the start and stop point of the casing pipe for the sanitary sewer crossing on Hagan Dr. Please revise.

Wall thickness described above shall follow the Design and Construction Manual specifications for wall thickness. For this application (i.e., a 16 inch casing pipe), the wall thickness shall be no less than 0.188 inches or 3/16". Please revise on the notes provided on the plan view.

Standard details for the sanitary sewer frame and lid shall be provided in the plans, as these were missing. Please provide these standard details.

A trenching and backfill detail was not included in the plans. Please provide a trenching and backfill detail for the sanitary sewer, and ensure it meets the new July 2020 standard of 12 inches of aggregate over the top of pipe. The City does not have a standard detail for trenching and backfill, so it will need to be produced by your firm. Please update and revise as appropriate.

Please provide a note on the plan view for manhole AA5 to be constructed as shown on the detail on Sheet 452. In addition, it is acceptable to bring the concrete to the surface rather than provide a 2 inch asphalt cap at this location, and it may be beneficial to clarify this on the notes. Please update as appropriate.

Table of Wye Connections: Lots are specified as F2 and F3, and this does not match the plat or the plans. Please show the correct lot numbers, and please show in graphical format on the same sheet the lot numbers.

Provide a note on the plans stating the following: "All construction activities conducted on the Lee's Summit Airport site shall be coordinated with the Development Services inspector and the Airport Manager. Excavation equipment may require the issuance of a Notice to Airmen (NOTAM) for the duration of the excavation equipment being present on the airport property." or equivalent language.

The alignment of the sanitary sewer still does not follow what was shown in the approved Preliminary Plat in terms of serving future lots. The Preliminary Plat proposed to place the sanitary sewer beneath Maguire north of Lot 3, and proceeding to the east under Maguire. There was additional line to be installed beneath Cargo Dr. Please see the approved Preliminary Plat for the approved alignment. Although changes or revisions may be allowed, this will require further discussions with Water Utilities, and the proposal to place the sanitary sewer between Lots 3 and 4 and Lots 2 and 5 was not approved by Water Utilities and would not be desired by Water Utilities.

Manhole AA1 is shown connecting to the existing manhole to the northeast. This existing manhole shall be labeled with the City manhole number 14-041. The line and its associated easement appears to encroach-upon an existing Southwestern Bell easement, which is not acceptable. There shall be no overlap of existing easements in this instance.

Manhole locations within pavement are shown in the center, which is not feasible. Recommend an offset to account for crown, and placement of the frame and lid within the middle of either driving lane to avoid wheel contact. Please revise.

Manhole locations within pavement are missing the concrete collar design. Please contact this office for an example to utilize, as the collar is required to be installed around the manhole frame and lid with KCMMB concrete and 2 inch asphaltic-concrete cap on top. Please update and revise as appropriate, and provide sufficient details on the concrete collar.

Sheet 422: Manhole AA5 is showing a future extension with flowline elevations. This implies a stub and hole will be provided. As discussed in previous comment letter, this is not allowed. Please provide bold notes stating "flowlines shown for reference only: future connections to be core-drilled" or equivalent language at dead end manholes with the intent to be extended in the future. However, please see comments concerning the placement of manhole AA5, as this is not desireable nor was approved at the Preliminary Plat phase of the project.

A trenching and backfill detail was missing from the details section. Please provide a trenching and backfill detail, and ensure it includes the new standard of providing a minimum of 12 inches aggregate cover over the top of pipe. Please update and revise.

For planning and revision purposes, future lots 4, 5, 8, 7, and 6 as identified on the approved Preliminary Plat are intended to be served from sanitary sewer lines installed along future Leinweber Rd., and future Cargo Dr. There were no plans at that time to serve any of those lots via a sidelot sanitary sewer as you are proposing. The City made an allowance to allow the installation of a sideyard sanitary sewer to the west of Lot 1 if proper procedures were followed, but we did not agree to allow for the continuation of this policy for the future lots discussed above. Please review, evaluate, and revise as appropriate. This may require a meeting to to discuss further with City staff, including Water Utilities.

Private sanitary sewer laterals were not shown on the plans. Please show their location either on the plan view with appropriate notation and stationing, or in table format. Please revise as appropriate.

The crossing at Jones Industrial Dr. shall be bored and cased. Provide a plan for the boring with appropriate notes, and provide the casing pipe material, the diameter, wall thickness, and all other information specified in the standard detail that is also required (and missing) from the plans. Please be aware this is not required at Maguire, as this is a new road and not an existing road. Please revise and update as appropriate.

Are there sufficient easements needed to connect to sanitary sewer manhole 14-041? There were none shown on the plans, and there are doubts there is a continuous easement needed to make the connection. It is possible that additional easement(s) shall be required. Please evaluate and revise as appropriate, and show all existing and proposed easements.

According to our limited research, there are no platted easements for sanitary sewer in the vicinity of manhole 14-041 either to the east or west. It appears the only easements are for electric in the vicinity of this manhole and sanitary sewer line. Do you have additional information from your ownership and encumbrance records which indicate the existence of additional easements? If so, please provide them and show them on the plans. Please review, update, and revise as appropriate.

It would appear there are significant issues with this plan. The connection point appears to be absent the required easement(s), the line and proposed easement encroaches into an existing Southwestern Bell easement which is not allowed, and the geometry and layout continues to show significant issues when compared to what was approved during the Preliminary Plat phase of this project. Therefore, no further review shall be conducted at this time.

The future sanitary sewer extension along west side of Lot 1 should be constructed during this phase rather than later. The City requires the sanitary sewer to be extended to plat boundary, and this does not meet the Ordinance requirement for extending the sanitary sewer to the plat boundary. Please review and revise as appropriate.

The sanitary sewer along the west side of Lot 1 shall be placed within an exclusive sanitary sewer easement rather than a general utility easement. The language shall be as follows "Sanitary Sewer Easement: A permanent and exclusive easement is hereby granted to the City of Lee’s Summit to patrol, alter, conduct surveys, construct, erect, inspect, install, maintain, operate, rebuild, reconstruct, relocate, remove, renew, repair and replace sewer pipe lines, manholes, and appurtenances thereto, including the right and privilege at any time and from time to time to enter upon, over, under, through, across, in, and upon those areas outlined or designated upon this plat at “Sanitary Sewer Easement” or within any street or thoroughfare dedicated to the public use on this plat. Grantor, its successors and assigns, shall not obstruct or interfere with Grantee’s use and enjoyment of the easement granted hereunder by any means, including, without limitation, obstructing or interfering with the operation, maintenance, or access to such pipe lines, manholes, and appurtenances thereto, by erecting, or causing or allowing to be erected, any building, structure, or other improvements on said easement. Grantor, its successors and assigns, to the fullest extent allowed by law, including, without limitation, section 527.188, RSMo., hereby waives any right to request vacation of the easements herein granted. All easements shall, at all times, be deemed to be and shall be a continuing covenant running with the land and shall be binding upon the successors and assigns of the Grantor."

Please ensure this easement is reflected on the final plat, and ensure the easement language is shown in the dedication portion of the plat.

Please revise the above-referenced sanitary sewer location so it is contained wholly-within Lot 1.

Ensure proper separation is provided between the storm line and the new sanitary sewer line.

Casing installation will not be required since the sanitary sewer along the west side of Lot 1 should be installed at this time rather than during phase 2. Please delete the casing pipe and associated notation.

Sanitary sewer along the west side of Lot 1 should be installed to the south of Maguire. The manhole shall not be allowed to have a pre-drilled stub, but rather, all subsequent connections shall be core-drilled.