Lee's Summit

Please refer to comment #3 in the previous applicant letter. Although slope callouts were provided, there are several instances on Sheet 12 and 13 where the running slope exceeds the City of Lee's Summit design standards of 7.5% maximum design running slope. Please provide a re-design which utilizes the 7.5% maximum running slope standard. This standard is used to allow for construction tolerance. Please evaluate and revise.

Plans include a Master Drainage Plan which is not required for this project. Although an overall mass grading and drainage plan is required, the Master Drainage Plan is defined in a different context. Suggest changing the title of the sheet and index on the cover sheet to "overall drainage plan" or equivalent language.

A SWPPP is required due to the size being larger than 1 acre.

ADA-accessible ramp details: Please include slope callouts for 1) running slope at ramps, 2) cross-slope of sidewalk and ramps, and 3) cross-slope, and diagonal slope at all turning spaces within ADA-accessible ramps. The latter includes all turning spaces at the Type B curb ramps, where the area between the ramps must be flat (i.e., no more than 1.50% design slope in any direction, including the diagonal direction). Please revise.

Sheet 12 and 13: A total of 4 of the curb ramps show truncated domes that are greater than 5 feet to the back of curb. A maximum of 5.0 feet to the back of curb is required, so the truncated domes will either need to be skewed, or a different design shown. Please evaluate and revise as appropriate.

Riley St., Wildflower Ln., Wildflower Ct., and Riley Ln. enter Heritage St. in a stop-controlled situation. ADA-accessible routes with a minimum of 5.0 feet across the entire route shall be established at these stop-controlled intersections with a design cross-slope no greater than 1.50%. Please show this on the ADA-accessible ramp design sheets.

The hydraulic grade line shall be shown on the profile view for all storm lines greater than 6 inches diameter. The design storm shall also be included on the hydraulic grade line callout. If the 100 year event cannot be contained within the pipe without surcharging as defined in the Design and Construction Manual, a suitable overflow route shall be established. Please evaluate and revise as appropriate.

In regard to above comment, if the 10 year event can be contained at or below the crown of the pipe, it is typical the 100 year event will still be within the pipe without surcharging. Recommend evaluating this approach to eliminate flooding concerns.

All cross-pipes beneath Collector roads (i.e., Heritage St.) shall either be RCP or CPP as specified in the Design and Construction Manual. Please revise as appropriate, since HDPE is not allowed beneath Collector streets.

A trenching and backfill detail for the storm lines appeared to be missing. Please provide a trenching and backfill detail with the updated 12 inch aggregate over the top of pipe which was adopted in July 2020. Please update.

Please see Traffiic comments related to the temporary turnaround on Heritage St. If you desire to end the street at Riley St. rather than completing Heritage St. to the east of Riley Place, recommend a meeting be set up with Development Services concerning the effects to the platting process, and other effects to storm design, etc. It is recommended a temporary cul-de-sac be constructed at the end of Heritage St. east of Riley Place which may take the form of a bulb extended to the north rather than a symmetrical cul-de-sac.

Sheet 3: Heritage St. - Minimum horizontal curve for a Residential Collector is 335’.

Sheet 22: Street name signs need to be a mix of upper- and lower-case letters (first letter capitalized) with directional suffix.

Sheet 21: Stop signs and street name signs on the side streets along Heritage do not have to be installed with this phase. If installed this phase, they should be covered.

Sheet 21: Add additional "No Parking" signs, one at each end of the stretch being designated. Add additional if needed around curve with double arrow.

Sheet 21/22: The end of road object markers should be the solid red diamond (no reflective buttons - OM4-3), spaced 6' OC, and 4' from the ground to the bottom of the diamond.

General: Constructing Heritage St. in its entirety with this phase creates a long deadend street. Without any side streets, this street will need a temporary turn around at the end. Alternatively, the street could be constructed to the northmost entrance/Riley St. with this phase and be extended with future phases.