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Home My WebLink AboutSDP000000023 Action Letter 1975-04-18 N.c.( OF ALBE-Mq Goes OF,AGy4y %ir� E Office of County Engineer 411 EAST HIGH STREET CHARLOTTESVILLE, VIRGINIA 22901 J. HARVEY BAILEY J. ASHLEY WILLIAMS COUNTY ENGINEER ASSISTANT ENGINEER April 18, 1975 Rivanna Water & Sewer Authority P. 0. Box 18 Charlottesville, Virginia 22902 Attn: Mr. George Williams Re: Bridge over Moore ' s Creek Dear Mr. Williams : The County has satisfied itself that the bridge proposed to be built by the Rivanna Water and Sewer Authority for access to its A.W.T. plant site, spanning Moore ' s Creek, will not adversely affect flooding. The road for application for a building permit is therefore open. A copy of a letter from the Corps of Engineers, stating their judgment in this matter, is attached. Very truly yours, • J. Harvey Bailey /CC: John L. Humphrey 4.�4T Op ( .6 � �� DEPARTMENT OF THE ARMY /`P NORFOLK DISTRICT, CORPS OF ENGINEERS Ca M FORT NORFOLK, 803 FRONT STREET NORFOLK, VIRGINIA 23510 c •GyTfo v. �f�,P STAreso+P IN REPLY REFER TO NAOEN-F 11 April 1975 Mr. John L. Humphrey Pianr,!ng Department Director of Planning County of Albemarle APR411 East High Street 5 Reed Charlottesville, Virginia 22901 Dear Mr. Humphrey: Reference is made to your letter of 26 March 1975 concerning the effect the proposed access bridge to the planned advanced waste water treat- ment plant would have on the 100-Year Flood on Moores Creek, Albemarle County, Virginia. The infoLulation you requested is contained herein. Our calculations indicate the proposed structure, as shown on the General Layout and Profile (Incl 1) , would not significantly increase the upstream water surface or the velocity in the immediate vicinity of the structure. Our preliminary floodway calculations computed in October 1972 indicated that encroachment on the 100-Year Flood plain at this location would be undesirable. However, a more detailed analysis at the location of the bridge indicates that encroachments to the degree proposed by the bridge would be acceptable. Therefore, we feel the bridge would have no noticeable adverse effects during flooding on Moores Creek. If we may be of further assistance in this matter, please call on us. Sincerely yours, 1-dc)tr7T-11114/14 1 Incl W. H. TAMM As stated Chief, Engineering Division N.�•l OF AL,9 GO� ��of wLe (F ey ��RG1N�N Office of County Engineer 411 EAST HIGH STREET CHARLOTTESVILLE, VIRGINIA 22901 J. HARVEY BAILEY J. ASHLEY WILLIAMS COUNTY ENGINEER ASSISTANT ENGINEER October 25 , 1974 Mr. William Roudabush, Inc . 914 Monticello Road Charlottesville , Virginia Re : Study for Rivanna Water { Sewer Service Board Dear Mr. Roudabush: We offer the following comments on the study for a certain parcel of land located between Moores Creek and highway I-64 , relative to its use as a trailer park: 1 . Flooding - This property begins approximately 2400 ' upstream from the confluence of Moores Creek and Rivanna River and continues up Moores Creek to a point approximately 6350 ' . from the confluence. According to flood information on Moores Creek, published by the U. S. Corps of Engineers , September 1971 , the 100-year (intermediate) flood plain would reach an elevation of 327 . 4 (MSL) at the lower end of this property and would rise to an elevation of 332 at its upper end. Embankments that are found in the proposed grading must not impede the flood flow so as to significantly increase the height of the flooding up stream. ' They must also be stabilized so as not to severely erode in the course of such flood. The bridge site at the upper end of the property must be set at such an elevation as will bring the'bridge superstructure above the predicted flood elevation at this point . 2 . Roadway - There appears .to be a 30 ' right-of-way on Linden Street, which is evidently the only right-of-way of record by which this area may have access to an existing public road system. The traffic projected from the 172 residential sites shown is 1104 vehicles per day, as computed by the Virginia Department of Highways (see letter of Highway Dept . dated October 3 , 1968) . Since Linden Street is within the City of Charlottesville, we believe the Highway Department ' s geometric standards will not apply. We would expect the road- way within the County from the City line to the first inter- Mr. William Roudabush, Inc . October 25 , 1974 Page 2 section within the trailer court to have a minimum pavement of 22 ' and be paved in accordance with the design standards of Category IV of the Virginia Department of Highways . Water - There is 1800± feet between the existing 6" main in Nassau Street and the first fire hydrant in the trailer court . The existing 6" City main will limit the fire-fighting capabilities of. the water system. This will be compounded if a 6" pipe is used to connect the trailer court. This should be done with an 8" water main so that if the water main within the City is improved , the trailer court will benefit also. A 6" system may be used within the court , beginning with the first street intersection, where fire hydrants are served. Sewer - Sewer lines shall be laid straight from man- hole to man-hole . Trailer connections are to be extended to the sewer mains . Where the upper end of a line coincides with a trailer connection, a cleanout may be provided in lieu of a man-hole. A 4" pipe may be used from the upper end of a. line to the first man-hole. Thereafter , the pipe shall he 8" . The section which crosses Moores Creek shall be of cast iron and shall be adequately supported and protected against breakage or washout. The foregoing comments are of a general nature , to be used as a guide . We will , of course, review and comment on detail plans and profiles as they are presented. It is hoped the above is sufficient to enable you to make a rough estimate of probable development costs . Very truly yours , J. Harvey Bailey County Engineer JHB/plf cc : Mr. John Humphrey Mr. Robert W. Tucker , Jr. Mrs Ruth Miller s. Mary Joy Scala vV4IY OF ALE3E7ti� ( 4. 42. '�kGIN�P Planning Department 411 EAST HIGH STREET JOHN L.HUMPHREY CHARLOTTESVILLE. VIRGINIA 22901 A.RUTH MILLER COUNTY PLANNER ZONING ADMINISTRATOR ROBERT W.TUCKER,JR MARY JOY SCALA ASSISTANT COUNTY PLANNER SENIOR PLANNER Memo to: William Roudabush From: Mary J. Scala, Senior Planner Date: October 24, 1974 Subject: Proposed Mobile Home Park at AWT Plant Site The planning staff has reviewed your site plan and makes the following comments: 172 mobile home sites Density: 172 mobile homes/49. 52 gross acres = 3 . 5 units/gross acre or 172 mobile homes/34 . 81 usable acres = 4 . 9 units/usable acre Parking required: 2 spaces/unit (10 'x20 ' ) or 344 spaces. Parking provided (approximate) : 166 spaces. The correct size and number of spaces according to the latest off-street parking requirements must be provided. Staff recommends that the bridge be constructed above the 100 year or intermediate regional flood level as established in the Moores Creek study by the Corps of $ngineers. A Special Permit must be obtained from the Board of• Supervisors for a mobile home park in the A-1 Agricultural zone. Site plan approval would probably be a condition of approval of the Special Permit. Staff would recomme- .d that the existing trees be retained wherever possible, and that a landscaping plan be prepared to show additional plantings. It is likely that the Planning Commission would require screening where mobile homes would be visible from the Interstate. Staff would recommend sidewalks on at least one side of all access - roads, The access roads must be of a dust proof material and maintained as such. (Gravelled with dust proof treatment or paved. ) The intersection located at the westernmost side of the property should be constructed at a 90 degree angle, rather than 45 degrees as shown. Staff would recommend that a community facilities building be in- cluded, to house a laundromat, office, community center or other activities. According to the proposed Mobile Home Park district in the proposed zoning ordinance, at least 200 square feet per unit should be de- veloped play and recreation area, or in this case, 34, 400 square feet. This area should be located above the flood plain. The steep slopes as shown (1: 1 to 11:1) should be stabilized with masonry. Public water and sewer facilities .must be provided. cc: J. Humphrey B. Tucker R. Miller J. H. Bailey