The drainage sub-watershed along the Turkey Creek Tributary north of Shawnee Mission Parkway and beneath Nieman Road has a history of flooding businesses and threatening infrastructure including retaining walls and utilities. The Northeast Johnson County Watershed Study completed by Johnson County in 2006 identified two businesses and Nieman Road flooding on this tributary. The existing double box culvert is undersized and inadequate and is contributing to the flooding of two businesses and inundation of Nieman Road. The proposed project will include replacement of box culverts, vertical walls east to Nieman South project (P.N. 3400), relocation of sanitary sewers and reconstruction of the undermined retaining wall adjacent to commercial enterprises.
Cynthia Moeller-Krass, P.E.
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The design contract was awarded to George Butler Associates (GBA) on October 10, 2016. Mega Industries LLC was awarded the contraction project on June 6, 2017. Construction is about 45% complete. Traffic on Nieman was shifted last week to put all traffic in the east lanes.
Concrete walls east of Nieman have been installed. Once walls have obtained full strength, they will be backfilled. This work is expected to be completed by December 1st . Mega will then begin installing handrails along the top of the walls and replacing curbs, pavements and landscaping at Commerce Bank and Shawnee Security Storage.
Mega is transitioning most wall construction activities to the west side of Nieman. Wall construction is expected to be nearly done by the end of December. Replacement of the culverts under the west half of Nieman will begin soon. Once culvert and wall construction is complete, handrails on the walls will be installed, and then the adjacent 6230 Nieman parking lot will be restored.
Additional work associated with this project includes replacement of a sanitary manhole on W. 62nd Terrace and a culvert wingwall and hand railing near the new Stag's Creek Development on Shawnee Mission Parkway north frontage road. The remainder of the parking lot by the former strip mall will be removed, this lot graded to drain to the channel and curb and gutter installed along the north side of the frontage road.
Construction is expected to be completed in late spring 2018. Traffic patterns on Nieman Road will vary throughout the project but it is our intent to keep 2-way traffic open at all times through this project area.