Lee's Summit

PLATTING. Platting of the subject property will not be required at this time for the parking lot improvement. Platting will be required for the future development of any portion of the parent tract and/or the dedication of right-of-way for future road extension through the property.

DE Engineers Estimate

The Engineer’s Estimate of Probable Construction Costs has been accepted for this project, and the Public Works Review and Inspection Fee of $30,130.77 (which is based on 3% of the total infrastructure cost) must be paid prior to the issuance of an infrastructure permit and/or the final processing of a building permit from the Codes Administration Department.

DE Contact Field Eng. Inspector

Contact Public Works Inspections at (816) 969-1800 at least 48 hours prior to the onset of construction.

DE Contact ROW Inspector

Contact a Right-of-Way Inspector at (816) 969-1800 prior to any land disturbance within the right-of-way. These activities may require a permit.

DE C&O #12 Cut & Fill

Any cut and / or fill operations, which cause public infrastructure to exceed the maximum / minimum depths of cover shall be mitigated by relocating the infrastructure vertically and / or horizontally to meet the specifications contained within the City’s Design and Construction Manual.

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.

The "Micro Stormwater Management Study" dated Oct. 10, 2016 (hereinafter referred to as the "stormwater report") did not appear to discuss the criteria for stormwater control. The City of Lee's Summit has adopted Kansas City APWA Section 5600 using the Comprehensive Control Strategy, and this requires a flat release rate per acre and 40 hour extended detention, neither which were shown in the report.

The stormwater report states that the downstream culvert at I-470 has a capacity of 720 cfs. What are the assumptions concerning this capacity? What is the resultant hydraulic grade line after development? Why is there an increase in the peak stormwater from the site after installing a detention basin? As previously discussed, the City of Lee's Summit has adopted the Kansas City APWA Section 5600 Comprehensive Control Strategy for control of stormwater, including peak flow attenuation, and 40 hour extended detention to achieve the water quality aspects of Section 5600. It appears the detention basin will not serve its intended purpose.

Sheet C2.05: The asphaltic concrete pavement section does not conform to the Unified Development Ordinance (UDO) Article 12 "Parking" requirements. Please see the UDO requirements for specific requirements in terms of aggregate base and subgrade stabilization.

Sheet C2.05: The curb detail should be updated to show the aggregate base and subgrade stabilization/geogrid a minimum of one (1) foot from the back of curb.

All Stormwater Profile Sheets: Please show the hydraulic grade line on the profile view, and please specify the design storm.

Sheet C3.01: An 8' by 10' outlet structure is specified on the plan view, but it does not appear a detail was provided. Please provide a detail, and please provide a reference to the detail on the plan view.

An itemized and sealed Engineer's Estimate of Probable Construction Costs should accompany your final submittal drawings. The Engineering Plan Review and Inspection Fee is based on this estimate, and calculated at 3% of the total site work. Items to include in the estimate are: 1) grading to establish proper drainage in accorance with the grading plan, 2) stormwater structures and pipe greater than 6 inches in diameter, 3) detention basin outlet structure, 4) rip rap, 5) flared end sections, 6) parking lot grading and compaction, 7) aggregate for parking lot, including the area one (1) foot beyond the back of curb, 8) subgrade stabilization or geogrid, including the area one (1) foot beyond the back of curb, 9) pavement, 10) curb and gutter, 11) erosion and sediment control devices and measures taken to conform to the erosion and sediment control plan, and 12) final restoration, including sodding, seeding, fertilizer, mulch, and topsoil.

DRIVE AISLES. The UDO requires all drive aisles serving two-way traffic to have a minimum 24' wide pavement width (excluding curb and gutter). Revise the following areas to meet the minimum 24' pavement width. - The north and center drive connections to the existing outer ring road have a pavement width of 20' (24' back-of-curb to back-of-curb). - The drive aisle pavement widths where the aisles are flanked by curbing on one side and striped parking spaces on the other side are 22' wide. - The drive aisle pavement widths where the aisles are flanked by curbed islands and/or a curbed parking lot boundary on both sides are 20' wide.

LIGHTING. Submit manufacturer specifications for all light fixutures for staff to review for compliance with Section 7.250 (Parking Lot Lighting) of the UDO.

PLATTING. The plans appear to show parcel lines different from that of the City's current parcel records. The property will need to be replatted under separate application to split it from the parent tract for the proposed parking lot addition.