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HomeMy WebLinkAboutBlue Woods Creek Report P. I). Box 279 Noblesville, Indiana JAI* 6, 1971 J Hamilton County iVainage Board John Hartle$, hairman Courthouse Indiana SUBJECTI Blue 'aooda Creek Preliminary eport Dear Board Members: Being that this sa preliminary report, it must be understood that this report is thefirst step in -ta. e eclution to this problem. linanary report deals with the overall aspect of the situation and provides alter-natives toward the total solution. Therefore, it further mast be understood that more, detail wore is needed before a contract can be let. The cost estimate is exactly at the two wards Ilean. The costs are estineWm and 'me final or contractual -oasts can only be det7eifem.aed a-tor17.41 design and final coestruction plans are prepared. The report is very well written; however, there are a couple of things that have been overlooked. There is a =all creek that drains the south part of Jordon '7ooci and aleasood sabdivisions that is not included in theplan or on the map This is a tributary streask--but an important one. This stream definitely needs iv,ITN emelt, es pecialliy at the lowe r and. A corrugated metal pipe of sufficitet size re ode to be installed under 106th. Street, and the ditch itself needs to be reconstructed at its lowerend. This ne ads to be part of the final plan. In the design they state, "the design frequency is 10 years for the channel with the stipulation that ail habitable buildings are above the loo, year stage.” I agree with the design criteria, but has this 130 year stage been deternined? I see nothing in the report that shows these high water elevations. The Indiana Department of Natural Resources, Division or Water, has these high water elevations. It appears to me that these elevations are necessary before the 100 year stage can be determined. comrend tne en$neering firm for takingan overall look at this stream in terms of reconstruction, but more importantly, in terms of people protection and future maintenance of the stream. In my opinion, the aediment Oheck Sams are a must. As pointed out in the report, this area will undoubtedly become all urban in the future and that erosion is a serious proble -while construction is taking place. These three (beck dame will be a tremendous help in mintainin , this stream. If these are not inetalled, chances are tue stream will have to be reconstructed again in a few years. 'under the cost estimate items on page 21, I feel that the quantity for some of the items is too high. iranted these are estimates, but I want to make a couple paints here. Clearin of trees, briars, bashes, etc., must be removed from the bottom, side slepes, and 10 ft. of the berm on each side of the ditch. Jowever, this is not enough room to get the heavy equipment through, but only enough additional clearing should be done to were the equipment and level them -Al. Unnecessary clearing is costly and a detriment to the beauty along the streams. The renort shows 32 acres of clearing. I a- sure this can be significantly reduced. the report states that the sharp curves shoald be rip-rapped. )er ex- perience has nroven that a mach better job is done and also less costly by rounding these corners to a 60 degree curve rather than a 90 degree bend. This approach sianificantly reduces the amount of erosion in the stream and provides a more even flow. As was stated in the report, the proposed lake a the Dawson farm is a significant factor in this whole solution. The design and capacity of this stream is based upon the fact that the lake will be constructed. There has been some talk that thelandowners along this stream would go ahead and reconstruct this ditch without going through the ehole Drainage 3card routine. If this is the case, this does not preclude the fact that a final design is not necessary. A final design and final construction plans are necessary. Further, it is my recommendation that all parties involved have a joint meeting and draw up a ccetract stating who, What, Weere, when, etc. Furtner, that the cost inveled be put into an escrow account before the construction begins. :n addition, the construction would have to be according to the findings of this report. aincerely, Tom Schellenberger District Conservationist IS:bs cc: ,3armel Flan Commission Bldg. Come. eerveyor John E. Asner Ken Thompson