Lee's Summit

Misc

Stream power is going to increase with the proposed re-channelization of the stream. Peak flows are likely going to increase with the proposed re-channelization. There are already downstream drainage issues, and this plan provides no detention like the previous plan proposed from a few years ago with The Grove project. This stream appears to have a drainage area in excess of 40 acres, and would not be in compliance with the stream buffer requirement for streams greater than 40 acres which prohibit grading activities within the stream buffer. It is for these reasons that the plan cannot be approved at this time. Recommend a Zoom meeting to discuss.

It appears the United States Army Corps of Engineers (USACE) permit expired in December 2020. It appears an extension was not filed. This will need to be addressed prior to approval of the plan.

The stream buffer issue was not addressed. If a waiver is being sought for the stream buffer requirement, it shall be submitted on forms provided by the City, along with a signed and sealed summary and exhibit(s) showing the proposed activity to be waived, and citations of the Design and Construction Manual which reference the stream buffer requirements. Please contact me for the templatel for the waiver is this is desired.

A cover sheet with title, index, and location map was missing from the plans. Please provide a cover sheet, index, and location map.

CORRIDOR 1ST FLOOR

It appears the swale along the north side of Maddox Acres (i.e., the portion of the swale running east/west) is operating as a detention basin based on the grading shown on the swale A-A plan. The slope is shown at approximately 0.5% to a low spot, then approximately 0.5% in the negative direction to the east. This appears to contradict what is discussed in the "Stormwater Summary" dated Nov. 17, 2023. Please evaluate and revise plans and/or the Stormwater Summary as appropriate.

CORRIDOR 2ND FLOOR

Is a rock check dam an appropriate control structure to limit stormwater migration to the south at the low point along the north property line of Maddox Acres? It would appear this plan resembles a detention basin in terms of functionality, and it would appear a more robust design is warranted.

CORRIDOR 3RD FLOOR

It is not clear how the swale will drain along the east side of the project limits. For instance, the plans show the swale connecting to the existing stream to the east, but that stream appears to drain across Lot 11 Maddox Acres.

CORRIDOR 4TH FLOOR

Is the intent to direct all stormwater from the stream and associated tributaries between Lot 8 and 9 Maddox Acres?

Misc

A specific erosion and sediment control plan is required. Please provide a specific erosion and sediment control plan on one (1) or more separate sheets.

Misc

What is the intent of this application? Are you proposing to construct a swale along the north to south portion, and then a bioswale? It is not clear from the plans what is being proposed.

MISC

There are no details concerning the off-site conveyance of stormwater on the plans. Is the intent to direct stormwater from the swale and/or bioswale to the south, in bettween the buildings to the south?

Miscellaneous Correction

The plans are pixelated when zooming into details, especially off-site areas. Please provide a clean copy which can be read when zooming into specific details.

Miscellaneous Correction

A stormwater report should be prepared for this application. The stormwater report should describe what and why this grading plan is being proposed, and should also include calculations of flow rates and depths of flow. It should also include exhibits.

Miscellaneous Correction

It is likely additional comments will be forthcoming on subsequent resubmittal. The existing plan is incomplete, and portions of the plan are illegible. Off-site buildings should be identified and shown clearly on the plans, along with any overland flow routes of stormwater.