Lee's Summit

Unit costs are very low compared to other projects I have reviewed for pipe, valves, connection to existing, and fire hydrants. I can send an example from a project with 5 times the scope, and 8 inch C900 pipe in 2022 was estimated at $45 a foot at that time. In 2025 dollars, it would be even higher. None of the unit costs shown in your estimate appear realistic, and instead appear to be based on very old data. Correction required.

Estimate appears to be identical to the one prepared 3 years ago. There has been approximately 20% inflation since that time. Correction required.

Please refer to comment #2 in the previous applicant letter. Although you have shown a valve on the south side of Dick Howser, it is in the middle of a sidewalk with no justification for placing within a sidewalk. Please move the valve to the north within the greenspace between the sidewalk and Dick Howser Dr. For clarity purposes, it may be beneficial to remove the rectangular symbol around the water main, because this appears to be a casing carrier pipe which is not needed or desired by Water Utilities for water mains. Please revise.

Sheet C.501 has been altered since the last submittal to include dashed circles. Please remove these circles, as they do not appear to serve any purpose.

Please refer to previous applicant letter. Details are provided for the connection to the existing 12 inch line on the north side of Dick Howser Dr., but we are now allowing 12 inch gate valves on 12 inch lines rather than butterfly valves. However, there is already an existing valve on the 12 inch leg near the connection point, so no additional valve is desired on the 12 inch line. We will require 1) one (1) 8 inch gate valve on the 8 inch line on the north side of Dick Howser, and 2) one (1) gate valve on the south side of Dick Howser Dr. This is required to isolate the line beneath the roadway in the event of repair. Please review and revise as appropriate.

Troon Dr. Fire Hydrant Relocation: Please refer to previous applicant letter comment #3. I requested you show the location of the relocated fire hydrant. The note states it will be made permanent, with no indication of where they are to be installed other than "2 feet behind the back of curb". This is not sufficient. Please show the location where this will be placed on the plan view. Please use bold linetype since this is a proposed feature. Please review and revise as appropriate.

Independence Ave. Fire Hydrant Relocation: Although the relocated fire hydrant has been notated, the location on the plan view is vague. It appears greyed-out, and would imply an existing feature. Please make this bold, and include a label showing in no uncertain terms this is the location of the relocated fire hydrant. Please revew and revise as appropriate.

Connection Point on Troon Dr. and Independence Ave: The linework is not accurate on the existing water main to the new water line connection points for both connections. The connection points appear to be connected to the fire hydrants to be relocated rather than the main. Please use standard drafting standards to show a clear indication of where the proposed line will be connected to the existing main. Please review and revise as appropriate.

The location of the existing valves on the existing 12 inch water line on the north side of Dick Howser Dr. are not accurate, and are also not shown on the water main itself. Please ensure the location of these existing valves are accurate and located on the line itself, and ensure there is adequate clearance between these valves and the new connection point. Please review, evlauate, and revise.

The note concerning shut-down of the water main implies the City shall be responsible for notification of residents. Please revise this note. In addition to what has already been shown on this note, please add the following: "Contractor shall be responsible for notification of affected water customers in accordance with the City of Lee's Summit Design and Construction Manual" or equivalent language.

General Loyout sheet is missing the connection to the water main on the north side of Dick Howser Dr. Please show the general location of the connection point on the General Layout sheet.

Sheet C.503: The conection to the 12 inch water main on the north side of Dick Howser Dr. is not shown. All details concerning this connection shall be shown, and boring beneath Dick Howser Dr. shall be required. Please revise as appropriate.

Show the location where the existing fire hydrants will be relocated. The note says to make them permanent, with no corresponding notes or location showing where they are to be installed. Please revise as appropriate.

Informational Comment: Casing pipe for the connection beneath Dick Howser Dr. is not desired.

A trenching and backfill detail was missing. Please ensure the new standard of 12 inch aggregate over the top of pipe is shown on the detail.

Ensure a note is provided stating that a cut-in tee is required on the 12 inch connection point on the north side of Dick Howser Dr.

It appears an additional fire hydrant is warranted along Line 1. Please review and revise as appropriate.

It appeears a 45 degree bend fitting is required at station 0+00 on line 2.