Lee's Summit

Engineer's Estimate appeared to be missing the following items: 1) construction entrances, 2) final restoration, and 3) sediment basin construction. If possible, please break out the estimate according to erosion and sediment control and mass grading covered by these plans.

Please remove the phrase "Not for Construction".

Please refer to comments on Street, Stormwater and Master Drainage Plan dated Feb. 14, 2022. It would appear the outlet pipe for the detention basin /sediment basin is in direct conflict with the preliminary design for the box culvert at Cape Dr. and the creek. Please review the preliminary design, and revise as appropriate.

Please add the words "and Mass Grading Plan" to the title of the plans.

Please refer to previous comments related to construction of the sediment basin as the first step in the project. I did not see anywhere in the construction staging table where the sediment basin is called-out for construction. It would appear this should be completed at step 1 in the process.

Sheet 11: The note on the bottom states the basin shall be built prior to any infrastructure being constructed. Please revise the note to state "prior to any work being performed", or simply remove the note and revise the table as described earlier in these comments (see comment 3 above).

Sheet 11: The faircloth skimmer is connected to an outlet structure with no references to its construction. Provide all necessary notation specifying where these construction details are located (i.e., within separate plan set, or alternatively, elsewhere within this plan set). In any case, the outlet structure and all appurtenances such is incoming pipe, trash rack, orifices, weirs, etc. shall require detailing in some fashion, whether in these plans or elsewhere. Proper referencing within this plan set shall be provided so there is no confusion within the field. It is also recommended that sufficient detailing be provided for the emergency spillway, the grading for the detention basin, and the 100 year WSE for the clogged condition in graphic format since these items are critical for easy conversion of the basin into a permanent detention basin at a later date.

Sheet 11: The design table located in upper right presents a "Time to Drain" as 2. What are the units for "Time to Drain"?

Sheet 11: No notes were provided on this sheet or elsewhere within the plan set regarding silt removal during construction activities. This shall be noted in the plans, with a target depth of silt when silt removal is required by the contractor. Silt shall be disposed properly off-site.

Sheet 11: Sufficient notation and diagrams are required showing how the faircloth skimmer will be attached to the trash rack of the 15 inch RCP. If this is not the intent (i.e., if the faircloth skimmer is being attached differently), then please be specific how it is being attached.

Sheet 11: Farcloth skimmer detail does not match the grading contours shown on this sheet. The skimmer detail shows a depression at the skimmer end of the assembly. Please be specific on the plan view by showing this depressed area, with separate notation as necesary.

All Sheets with Erosion and Sediment Control Staging Chart: Please add the sediment basin and installation of the faircloth skimmer details into this chart. Revise as appropriate, with suitable refernces to the details and sheet number contained within this plan set.

Please remove the easements for the incoming and outgoing pipes serving the detention basin. These lines are private, and no easement is desired by the City. Please ensure this comment is carried-through to the final plat.

Note 2 under Site Specific Notes: It is our understanding that wetlands do exist on this site. Is this correct, or am I misunderstanding? The note should be revised if this is correct.

All Sheets with Erosion and Sediment Control Staging Chart: Please add notes concerning the removal of silt within the sediment basin. The note shall be specific as to the depth of silt when removal is warranted. Notes shall be specific as to the disposal of silt, since this cannot be used as structural fill anywhere on the project site, and proper disposal is required.

A Stormater Pollution Prevention Plan (SWPPP) was missing from the submittal package. This shall be required prior to approval of any plans for this project.

It is our understanding that wetlands exist on this project. Please submit all required documentation concerning this issue from the U.S. Fish and Wildlife Service. This shall be required prior to approval of any plans.

A cost estimate was requested in previous applicant letter, and the response to comments states this was included in the resubmittal package. I did not see any cost estimate included with the package. This shall be required prior to approval of these plans.

A SWPPP shall be required prior to approval of the erosion and sediment control plan.

A Master Drainage Plan was included within the erosion and sediment control plan. Please remove. This should be included within the Stret, Stormwater, and Master Drainage Plan set.

Will the detention basin be utilized as a sediment basin? If not, why not?

If utilizing the detention basin for a sediment basin, then appropriate design shall be shown for the sediment basin, and sufficient notes stating this shall be the constructed along with all other erosion and sediment control devices on the project.