10-03-1985 Public Hearing and Regular Meeting

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• • • CITY OF LA PORTE INTER-OFFICE MEMORANDUM • T0: Planning & Zoning Commission FROM: Bob Speake ~ City Engineer2~ DATE: September 26, 1985 SUBJECT: Dana Tank Container, Inc. Variance Request City of La Porte File Number 85-4403 Staff has reviewed the letter submitted September 11, 1985 by Dana's Engineer, SIP Engineer, Inc. We have advised both Dana and SIP that the statements made in their letter in support of their request may require further explanation. We have recommended that the applicant make a presentation at your October 3 meeting. • Staff has evaluated this request and has the following observations to make at this time: 1. Roadside drainage for this North "K" Street extension will empty into the roadside ditch on North Broadway. That ditch is not deep enough and can't be feasibly deepened enough for curb and gutter drainage on North "K". Roadside ditches do provide an acceptable • solution. 2. The applicant wishes to construct a roadway consisting of 6" of lime stabilized subgrade, 12" of calcium sulfate base material, and 3" of hot-mix asphalt concrete surfacing. The Development Ordinance calls for a reinforced concrete roadway structure (local soil conditions dictate lime stabilized subgrade as well). A. In the past year, the City has experimented with a similar type construction to upgrade a number of our residential and commercial streets. This past winter, severe cracking was experienced in several of the streets. Some of the more serious cracks are believed to be due to problems with shrinkage of the calcium sulfate base. To solve the problem, a special repair procedure has worked out and the contractor extended his warranty an additional • year. If problems with the calcium sulfate can be eliminated by the developer, the roadway structure proposed is strong enough for the type traffic contemplated.