Lee's Summit

Street Name Sign for Innovation Pkwy shall be NW Innovation Pkwy.

Calculations must be provided for the special junction box and manhole design. The calculations should include the standard to which it is designed.

Sheet C502 and C503: The inner diameter of the manhole must be five (5) feet rather than four (4) feet. Please revise accordingly.

Please ensure that all design details, including steel reinforcing on the plan view (i.e., not just the section views), monolithically-poured barrel section/junction box top are included for the special-design junction box/manholes.

The stilling basin does not appear to be large enough to handle the anticipated stormwater flows, especially for a 66" pipe. It would appear this feature will be washed away during a normal storm event. Are there any other measures proposed downstream of the rip-rap check dam to stabilize the surface? It would seem that the stilling basin should be enlarged considerably, and at a minimum, rip-rap placed for a considerable length downstream of the check dam.

The plans show a significantly different alignment for the main trunk line storm sewer, and also a different material for the main trunk line storm sewer (i.e., RCP rather than a 5 x 5 foot box culvert). By substituting RCP for the RCB, junction boxes with manhole extensions on top are now proposed on top of large, buried junction boxes. The City's standard detail does not allow for any extension above a junction box of greater than a foot, nor does it allow for the placement of a manhole on top.

Why is the storm sewer so deep? As a public system, this raises considerable maintenance concerns.

Sheet C201: It does not appear that the junction box call-outs on this sheet match what is shown on the details.

Sheet C502: The boxes shown on this sheet do not appear to match the call-outs on Sheet C201.

Sheet C502: These junction box/manhole hybrids do not appear to meet any currently-accepted City standard detail.

Sheet C101: A considerable amount of stormwater will daylight at the end of the storm sewer trunk line. What is the grading plan after it daylights? Of particular concern is the existing sanitary sewer manhole which will be in the path of stormwater, assuming it is still in operation after the installation of the storm sewer trunk line.

Please note that the City standard detail for junction boxes are from the Kansas City Chapter of the APWA. These details do not allow for a junction box to be installed greater than 7' x 7' in width without a special design, or greater than 7' in the vertical dimension without a special design. All aspects of the design will need to be shown, including steel reinforcing bars in the plan and section views, thickness of concrete, etc.

Sheet C201: The rip rap at the end of the main storm sewer trunk line does not appear to be large enough to handle the stormwater flows. The profile view also shows a "bump", presumably for additional energy dissipation. If this is going to be maintained as a public storm line, then a more robust system should be provided for the long term maintenance at the end of pipe.

Sheet C201: After an evaluation of the depth (i.e., raising the stormwater trunk line to a more reasonable depth), it may be necessary to provide a short segment at the end of the pipe where the slope will be minimal. This will aid in reducing the velocity at the end of pipe. It will, however, require an additional junction box.

Add street name signs at the intersection of Ward and Innovation above the stop sign.

Add stop sign and street name signs at the intersection of Innovation and Tudor

Remove all thru arrows and thru/right combination arrows from the pavement markings with exception of the two thru/right combination arrows along northbound Ward Road (temporary).

Note 12 on the General Notes shall refer to Ward Road as an Arterial, not a Collector.

The southbound left turn lane along Ward Road at Innovation Pkwy must be at least 200' in length plus the taper shown on the plans.

Include a signing plan.

The marking arrows need to be located in accordance with the City's standard details.

Additional dimensioning or notes for the length or beginning/ending of each marking line (and radius if applicable) need to be provided on the plans.

Consider using 250W lighting fixtures; I am concerned the 400W fixtures and lighting levels designed will be too bright for the setting of Innovation Parkway. Refer to prior comments emailed on 4/13/15: "I would be comfortable with 250W HPS fixtures and even target an avg illumination between 1.3 and 1.7 since Innovation Pkwy is more of a commercial local/collector hybrid and the surrounding Ward and Tudor will be well lighted at the arterial standards." The design standard in the DCM has been met, so no change is required, however the suggestion to lower the avg. illumination is recommended. Tudor Road used 40' poles with 250W luminaires.

Please provide separate plans for the sanitary and the water line extension. These plans will need separate MDNR permits.

Please provide an overview sheet for the sanitary and the water line (i.e., on one sheet for each). It is difficult for our inspectors to determine their bearings without an overview sheet.

Provide a note stating that "...all construction shall follow the City of Lee's Summit Design and Construction Manual as adopted by Ordinance 5813. Where discrepancies exist between these plans and the Design and Construction Manual, the Design and Construction Manual shall prevail."

Please show a five (5) foot sidewalk on each side of Innovation Parkway.

Sheet C106: The profile view shows a "new 8" PVC San Sewer", but it is unclear where it is.

What is the plan for energy dissipation at the end of the reinforced concrete box? As shown, the RCB daylights in the middle of a slope which will likely erode in a severe manner. The City recommends that the box be extended to the toe of the slope, and appropriate energy dissipation measures installed.

Hydraulic grade lines for the design storm within the stormwater system should be shown on the profile view. If the system cannot manage the 100 year event without surcharging, then an overflow route will need to be established.

Sheet C501: The typical section for the road widening on Ward Road does not appear to be correct. Please check the Design and Construction Manual and revise as appropriate.

It would appear that turf reinforcement mat would be appropriate for the slope on the northeast portion of the project. Please specify the type of turf reinforcement mat and limits of installation.

There is a note on the erosion control plan (Drawing C102) stating Contractor shall submit his detailed erosion control plan for approval at the start of construction. A reviewable ESC plan shall be included with the Engineering Plans. To produce a reviewable ESC plan, significant improvements to the previous plan are necessary.

Use Lee’s Summit Design and Construction Manual 2150 and 5100 for guidance. Lee’s Summit’s Design and Construction Manual Sections 2150 and 5100 are virtually the same as APWA Kansas City Metropolitan Chapter Construction and Material Specifications Sections 2150 and Design Criteria Section 5100. Lee’s Summit has one amendment to Section 2150; the amendment prohibits the use of silt fence in swales, drainage ways, channels and other conduits, and it prohibits the use of silt fence to direct or divert water.

Four specific comments on the ESC plan sheet are: 1. The extent of the land disturbance area was not found on the ESC plan sheet. Include the size of the land disturbance area. 2. Include detail drawings for proposed ESC devices. 3. If there is a MDNR requirement for sediment basin(s) on a project the size of Summit Innovation Center, include sediment basin(s) in your ESC plans. Details including, but not limited to volume required and volume provided in the sediment basins will be required. 4. The ESC plan will need to be significantly upgraded.