1999-12-13 Regular Meeting, Workshop Meeting, and Public Hearing

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e e Street, will be upgraded and replaced with a 8' x 4' box culvert storm sewer. This combination of larger storm sewer and detention will mitigate the impact from the additional impervious area created by this project. All storm water runoff east of the UPRR will be directed into Little Cedar Bayou. No analysis was performed to determine the impact a future overpass would have on the proposed Fairmont Parkway drainage system. That analysis should be performed in conjunction with this Preliminary Engineering Report to identify additional drainage improvements, if needed, to accommodate a future overpass. Pipelines - There is a potential conflict between proposed underground storm sewer improvements and the two 8" Exxon pipelines which are located along the west side of 16th Street north and south of Fairmont Parkway. The storm sewer facility will have less than a foot of clearance from the two 8" pipelines. More accurate field probings of the pipelines and minor adjustments to the storm sewer system may eliminate this potential conflict. Utilities - Entex has existing 8" and 2" gas lines within the Fairmont Parkway and 16th Street right-of-way which will have to be relocated. Reliant Energy(HL&P) has aerial power lines. Power poles along the north side of Fairmont Parkway and along 16th Street will require relocation. Southwestern Bell has underground cable along Fairmont Parkway and 16th Street which will require relocation. City water and sewer lines along Fairmont Parkway will not be in conflict with any roadway improvements. However, an 8" water line along 16th Street north of Fairmont Parkway, and a 16" LPAWA line south of Fairmont Parkway will be under proposed pavement and their relocation should be considered. Railroad - When a future grade separation is constructed at the UPRR, the Fairmont Parkway median ditch detention capacity will be reduced. This will impact the function of the Fairmont Parkway drainage system. Traffic Signal - Klotz Associates performed traffic signal warrant studies for 16th Street and for 14th Street. Installation of a new traffic signal at 16th Street is proposed for this project. However, no warrants were met at the 14th Street intersection so no signal is proposed at this time. Future growth in the 14th Street area along with increased vehicle volumes may warrant a signal sometime in the future. The 16th Street traffic signal will be interconnected with the traffic signal at SH 146 to provide for optimal timing. At a project kick-off meeting with representatives from the engineering firms, Planning Dept. staff requested that mast arm type signals be considered in lieu of the typical span wire configuration. Although identical in function, the mast arm signal has a cleaner appearance without the clutter associated with span wire signals. Page 4 of 5