Lee's Summit

DE Engineers Estimate

The Engineer’s Estimate of Probable Construction Costs has been accepted for this project, and the Engineering Plan Review and Inspection Fee (which is calculated as 3% of the total infrastructure cost plus a flat $85 right of way fee) shall be paid prior to approval of the plans. These must be paid prior to the issuance of an infrastructure permit and/or the final processing of a building permit. $5,913.28

DE Commercial Detention Basin

The applicant shall submit and the City shall accept an “As-built / As-graded” detention basin plan prior to issuance of any Certificate of Substantial Completion or occupancy permit for the proposed development.

DE Contact Field Eng. Inspector

Prior to the commencement of any construction activities, the Contractor shall contact Field Engineering Inspections at (816) 969-1200 to coordinate a preconstruction meeting / conference with the assigned Field Engineering Inspector.

DE Future Repair Work

Please be aware that any future repair work to public infrastructure (e.g., water main repair, sanitary sewer repair, storm sewer repair, etc.) within public easements will not necessarily include the repair of pavement, curbing, landscaping, or other private improvements which are located within the easement.

DE Engineers Estimate

The Engineer’s Estimate of Probable Construction Costs has been accepted for this project, and the Engineering Plan Review and Inspection Fee (which is calculated as 3% of the total infrastructure cost plus a flat $85 right of way fee) shall be paid prior to approval of the plans. These must be paid prior to the issuance of an infrastructure permit and/or the final processing of a building permit. $5,913.28

DE Commercial Detention Basin

The applicant shall submit and the City shall accept an “As-built / As-graded” detention basin plan prior to issuance of any Certificate of Substantial Completion or occupancy permit for the proposed development.

DE Contact Field Eng. Inspector

Prior to the commencement of any construction activities, the Contractor shall contact Field Engineering Inspections at (816) 969-1200 to coordinate a preconstruction meeting / conference with the assigned Field Engineering Inspector.

DE Future Repair Work

Please be aware that any future repair work to public infrastructure (e.g., water main repair, sanitary sewer repair, storm sewer repair, etc.) within public easements will not necessarily include the repair of pavement, curbing, landscaping, or other private improvements which are located within the easement.

DE Engineers Estimate

The Engineer’s Estimate of Probable Construction Costs has been accepted for this project, and the Engineering Plan Review and Inspection Fee (which is calculated as 3% of the total infrastructure cost plus a flat $85 right of way fee) shall be paid prior to approval of the plans. These must be paid prior to the issuance of an infrastructure permit and/or the final processing of a building permit. $5,913.28

DE Commercial Detention Basin

The applicant shall submit and the City shall accept an “As-built / As-graded” detention basin plan prior to issuance of any Certificate of Substantial Completion or occupancy permit for the proposed development.

DE Contact Field Eng. Inspector

Prior to the commencement of any construction activities, the Contractor shall contact Field Engineering Inspections at (816) 969-1200 to coordinate a preconstruction meeting / conference with the assigned Field Engineering Inspector.

DE Future Repair Work

Please be aware that any future repair work to public infrastructure (e.g., water main repair, sanitary sewer repair, storm sewer repair, etc.) within public easements will not necessarily include the repair of pavement, curbing, landscaping, or other private improvements which are located within the easement.

Miscellaneous Correction

Provide complete site lighting design including all circuitry and light pole base detail. 7/1/22 - deferred per request 10/10/22 - Still deferred as circuitry not provided and light pole base does not have engineer's seal/signature. field verify.

Code Statement

All issues pertaining to life safety and property protection from the hazards of fire, explosion or dangerous conditions in new and existing buildings, structures and premises, and to the safety to fire fighters and emergency responders during emergency operations, shall be in accordance with the 2018 International Fire Code.

A SWPPP is required for any site with land disturbance greater than 1 acre. This appears to be the case, and a SWPPP appears warranted for the project. Please submit a SWPPP for review.

The cost estimate appeared to be missing the following items: 1) turf reinforcement mat.

The unit prices contained within the cost estimate appeared low for 1) asphalt paving, 2) geogrid, 3) curb and gutter, 4) silt fence, and 5) seeding/mulching and fertilizer. Please review and revise.

Miscellaneous Correction

Provide complete site lighting design including all circuitry and light pole base detail. 7/1/22 - deferred per request

OWNERSHIP AFFIDAVIT. Please upload an ownership affidavit application. The response letter states that it will be uploaded, but the required form has yet to be received.

LIGHTING. - Please show the lighting specification for the pole and the head light fixture. Parking lot lighting shall meet the requirements of UDO Section 8.250. - Please indicate the foot-candle level at the property line shared with the residential property to the west. A max of 0.5 fc is allowed. Provide a revised photometric plan. The FDP response states that the required information above will be provided under separate cover. Staff has yet to received said plans.

Please refer to the previous applicant letter. Although the swale slopes have been modified, there are issues with the calculations for velocity. The calculations for velocity appear to be based on uniform normal depth flow, which is not the case for these slopes. A preliminary glance at the slopes indicate the flow is supercritical. This will lead to excessive flow velocities for all storm events, and will lead to significant back-cutting of the swale towards the parking lot. It would appear a better system is required such as an undergound pipe and inlet system. Please revise as appropriate.

100 year water surface elevations shown on the plan view were not changed after revisions to the swale entering the basin. This shall be required since the outline of the 100 year WSEs for both the nominal and clogged condition do not make sense in relation to the proposed contour elevations. However, please see comment above since it appears a different system for conveying stormwater to the basin is needed. Please evaluate and revise as appropriate.

Please see previous applicant letter concerning the new point source of stormwater directed towards the east. The response to comments letter stated that a berm is being proposed to capture more of the stormwater around the field inlet to the north of the basin, but the grading plan is not clear in this respect. Perhaps additional contours tying into the 1014 elevation contour just north of the inlet are needed to specify a berm is to be installed at this location to prevent bypassing the field inlet? Additional notes on the plan view would also appear warranted. Please review, evaluate, and revise as appropriate.

In lieu of an underground stormwater collection system to convey stormwater to the detention basin, it may be possible to design a system utilizing specialized turf reinforcement mat - such as the ones developed for higher velocity flows in the supercritical flow regime. If such a system is desired, it shall be based on manufacturers recommendations for design, and calculations shall be provided. Please be aware these calculations cannot be based on Mannings equation unless it can be proven that flow is within the subcritical flow regime. Please review and evaluate, and revise as appropriate.

OWNERSHIP AFFIDAVIT. Please upload an ownership affidavit application. The required form has yet to be received.

LIGHTING. - Please show the lighting specification for the pole and the head light fixture. Parking lot lighting shall meet the requirements of UDO Section 8.250. - Please indicate the foot-candle level at the property line shared with the residential property to the west. A max of 0.5 fc is allowed. Provide a revised photometric plan. The FDP response states that the required information above will be provided under separate cover. Staff has yet to received said plans.

Miscellaneous Correction

Provide complete site lighting design including all circuitry and light pole base detail. 7/1/22 - deferred per request

Both swales entering the detention basin abruptly enter at a 3:1 slope, which will lead to rilling and erosion and subsequent backcutting of the swales. A better design is required to manage the stormwater flows from both swales entering the detention basin. Please evaluate, review, and revise the design as appropriate.

Index on the cover sheet does not match what is shown in the plan set. Please review and revise as appropriate.

A spillway is called-out on Sheet C.202, but this appears to be an emergency spillway. Please correct the callout.

Are steps being provided for the outlet structure? If so, where are they located?

As built note on Sheet C.202 only listed as built storage. Other aspects of the as built conditon shall be required, such as top of dam elevation, spillway elevation, weir/orifice elevations, top of structure, bottom of detention basin, and other as built information for the detention basin. Please revise as appropriate.

Addtiional off-site elevation contours are required showing how the discharge of the detention basin will be directed off-site. As shown, it is impossible to determine the impact of this new point source discharge. Please review, and if negative impacts are shown, a redesign of this discharge point is required.

Is the 24 inch HDPE flared end section connected to the outlet structure with the trash rack going to be RCP rather than HDPE? It appears RCP is better suited for this design. Please review and revise as appropriate.

Would RCP be better suited for the incoming pipe connected to the outlet structure?

Incomiong swales may need to be eliminated, and an underground storm line system installed in their place. With the excessive slope in a portion of one of the swales (i.e., 10% on a portion of the southern swale), and the abrupt discharge into the detention basin, it appears this is warranted. Please review and revise as appropriate.

Longitudinal slope callout for a portion of the southern swale was missing. It appears to be 10%, which is too steep for a swale. Please see previous comments concerning the applicability of an underground pipe system from the parking lot to the detention basin. It appears this is warranted.

Grading along the northeast side of the detention basin appears to show a small swale directed towards the adjacent property to the east, and existing drainage in this area appears to sheetflow. This new point discharge has the potential to create an adverse impact to adjacent property owner to the east, and mitigation is warranted. Please evaluate, and revise as appropriate.

Cost estimate shall be required prior to final approval.

OWNERSHIP AFFIDAVIT. Please upload an ownership affidavit application.

STREETS. Label the centerline and ROW width for SW Hook Rd.

LIGHTING. - Please show the lighting specification for the pole and the head light fixture. Parking lot lighting shall meet the requirements of UDO Section 8.250. - Please indicate the foot-candle level at the property line shared with the residential property to the west. A max of 0.5 fc is allowed. Provide a revised photometric plan.

Miscellaneous Correction

Provide complete site lighting design including all circuitry and light pole base detail. 7/1/22 - deferred per request

Ownership affidavit. Please upload an ownership affidavit application.

Parking lot spaces. Please show the width of the parking lot space.

Center line. Please label the center line.

ROW. Please label the ROW width.

Required parking. Please show the required parking numbers.

Setback lines. Please show all parking and building setback lines.

Drive aisle entrance. Please show the dimensions of the drive aisle entrance into the new parking lot.

Lighting specs. Please show the lighting specification for the pole and the head light fixture. Please indicate the foot-candle level at the property line shared with the residential property to the west. A max of 0.5 fc is allowed.

Building expansion. The building expansion is not being reviewed right now, please remove the expansion.

Landscape. Based on the square footage of the disturbed are for the expansion you will need to apply the open yard trees and shrubs that are required. Please refer to UDO Sec 8.790

Curbing. Identify the proposed curb type. CG-1 curbing is required along the entire parking lot boundary.

Plans were incomplete for the reasons specified below. Subsequent rebsubmittal reviews will be assigned a ten (10) business day review schedule rather than the normal five (5) business day review schedule.

The "Macro Storm Water Drainage Study" darted Jun. 2, 2022 (hereinafter referred to as "the stormwater report") discussed within the "General Information" section the existing parking lot, and enclosed drainage system. However, there is no discussion of the modifications to the existing detention basin. Wouldn't it be appropriate to discuss the existing basin, and the reason why this new basin is being constructed? Please review and revise as appropriate.

Section 5 "Existing Conditions Analysis" in the stormwater report discusses that stormwater detention was not required in the past. However, we are showing the existence of a detention basin at the discharge end of the pipe serving the parking lot and existing building. Do you have documentation stating that detention was not required in the past? Please evaluate and revise as appropriate. If detention was required in the past, the existing development shall be included in the detention basin calculations for purposes of determining the allowable release rate. This may change the allowables discussed within the report, and may change the overall storage of the detention basin.

Detention basin plans were not included within the Final Development Plan. No review was conducted. Please ensure all information is included on this plan sheet(s), including 1) 100 year WSE, 2) 100 year WSE clogged/zero available storage, 3) emergency spillway elevation, 4) top of dam, 5) graphical representation of the 100 year WSE both nominal and clogged, with dimensions to closest property lines, and buildings to ensure minimum 20 foot separation is maintained, 6) 100 year storage nominal, 7) 10 year storage nominal, 8) 2 year storage nominal, 9) water quality volume nominal, 10) aloowables for each event. This will enable a quick review of the required "as-built" detention basin plan prior to acceptance.

Detention basin plan sheet(s) and erosion and sediment control plan sheets shall include notation specifying the detention basin to be constructed with the erosion and sediment control measures.

Detention basin plan sheet(s) shall include notation that an as-built be prepared prior to acceptance.

Rip rap dimensions and materials were not specified. In addition, calculations were not provided to support the above. Please analyze, review, and revise as appropriate.

Sheet C601: The sidewalk reference at bottom of sheet is illegible and contains a reference to "missing or invalid reference". Please cleanup and revise as appropriate.

Profile view of storm lines greater than 6 inches were missing. The roof drains were not labeled as to size, so it is not clear if applicable. However, the detention basin outlet structure includes a pipe greater than 6 inches in diameter, and a profile view shall be provided.

Underdrain detail was provided with no such underdrains called-out on the plan view elsewhere in the plan set. If not needed, please remove.

Sheet C103: ADA-spaces were not shown and were not detailed. A complete detail is required of all ADA spaces. Please revise as appropriate.

Flumes are called-out, but no detail is shown. Please revise as appropriate.

Swale cross-sections shall be required from the discharge of the parking lot to the detention basin. Spacing for the swales shall be at the discretion of the engineer.

Slope call-outs shall be provided for the swales discussed above.

Miscellaneous Correction

Provide complete site lighting design including all circuitry and light pole base detail.