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Item 4L Department of Planning & Development Services S T A F F R E P O R T April 30, 2008 ZA08-015 CASE NO: Plat Showing for Lots 3-6, W.W. Hall No. 687 Addition PROJECT: REQUEST: On behalf of Robert L. Stevenson, Civil Solutions, Inc. is requesting approval of a Plat Showing for four (4) office-commercial lots on 2.887 acres located at 310 E. Southlake Blvd. No variances are being requested. A variance to the Subdivision Ordinance requirement for street frontage was approved with this property’s zoning change and site plan (ZA07-129). Consider plat showing approval ACTION NEEDED: ATTACHMENTS: (A) Background Information (B) Vicinity Map (C) Plans and Support Information (D) Plat Review Summary No. 2, dated April 11, 2008 for Commission and Council Members Only (E) Full Size Plans () STAFF CONTACT: Ken Baker (817)748-8067 Clayton Comstock (817)748-8269 Case No. ZA08-015 BACKGROUND INFORMATION OWNER: Robert L. Stevenson APPLICANT: Civil Solutions, Inc. PROPERTY SITUATION: 310 E. Southlake Blvd. LEGAL DESCRIPTION: Tract 3, W.W. Hall Survey, Abstract No. 687 LAND USE CATEGORY: Office Commercial CURRENT ZONING: S-P-1 Detailed Site Plan District Southlake Villa Offices HISTORY: A Zoning Change & Site Plan for was approved by City Council on March 18, 2008 (ZA07-129). WATER & SEWER: There is an existing 12” water line along the north side of Southlake Blvd. to serve this property. There is an existing 8” sanitary sewer line along the north side of Southlake Blvd. to serve this property. DRAINAGE ANALYSIS: Drainage from this development will be to the detention pond in the southwest corner of the site. See Landscape Administrator’s comments in Plat Review Summary No. 2. TREE PRESERVATION: P&Z ACTION: April 17, 2008; Approved on Consent (6-0) STAFF COMMENTS: Attached is Plat Review Summary No. 2, dated April 11, 2008 N:\Community Development\MEMO\2008cases\015 -PS - Lots 3-6, WW Hall, No. 687 Addition\Staff Report\08-015PS.PZ 4-17.doc Case No. Attachment A ZA08-015 Page 1 Lots 3-6, W.W. Hall No. 687 Addition Case No. Attachment B ZA08-015 Page 1 APPROVED SITE PLAN Case No. Attachment C ZA08-015 Page 1 PLAT SHOWING Case No. Attachment C ZA08-015 Page 2 PLAT REVIEW SUMMARY ZA08-015Two04/11/08 Case No.: Review No.: Date of Review: Plat Showing – Lots 3—6, W.W. Hall No. 687 Addition Project Name: ENGINEER/SURVEYOR/PLANNER: SURVEYOR: Civil Solutions, Inc. Fulton Surveying Inc. P.O. Box 100247 115 St. Louis Avenue Fort Worth, TX 76185 Fort Worth, TX 76104 P: (817)423-0060 P: (817)335-3625 F: (817)346-0520 F: (817)335-3629 03/31/08 CITY STAFF HAS REVIEWED THE ABOVE REFERENCED PROJECT RECEIVED BY THE CITY ON AND WE OFFER THE FOLLOWING STIPULATIONS. THESE STIPULATIONS ARE HEREBY MADE CONDITIONS OF PLAT APPROVAL UNLESS SPECIFICALLY AMENDED BY THE CITY COUNCIL. IF YOU HAVE ANY QUESTIONS OR NEED FURTHER CLARIFICATION, CLAYTON COMSTOCK AT (817)748-8269 OR JONATHAN PICHA AT (817)748-8070 PLEASE CONTACT . 1. Provide a note that the detention pond easement is to be owned and maintained by owners association or by the owner of Lot 4 if no owners association exists. 2. A variance to the Subdivision Ordinance requirement for street frontage was approved with this property’s zoning change and site plan (ZA07-129). The common access easement must be built to street standards. 3. Provide a cross-access and reciprocal parking agreement prior to filing plat. Agreement must cover the maintenance and use of parking, trash enclosure, detention, etc. * Please submit a revised "check print" prior to submitting blackline mylars with original signatures. * A “Certificate of Taxes Paid” indicating that there are no delinquent taxes owed on the subject property from each taxing authority must be provided to the City prior to filing this plat in the County records. A copy of this information may be obtained from the Tarrant county Tax Assessor/Collector’s Office located at 100 E. Weatherford St. in Ft. Worth (across from the old red courthouse). There is a service charge of $10 per account for this certificate. For more information contact the Assessor/Collector’s office at (817) 884-1103. blackline * Original signatures and seals will be required three mylars prior to filing the plat. Also required are two sets of owner's dedications and notaries (8.5" x 11" or 14" paper) with original signatures and seals on each. Mylars will not be accepted if any erasures or original ink, other than signatures or seals, appear on the plat. * We recommend this plat not be filed until the construction plans have been substantially approved. This will ensure adequate easements and finish floor elevations. Minimum finish floor elevations may be required on the following lots pending review of construction plans: * A Developers Agreement is required prior to construction of any public infrastructure. The Developer's Agreement for this addition should consider streets, drainage, park dedication requirements and fees, off-site sewer extensions, off-site drainage and utility easements and impact fees. * Denotes Informational Comment Case No. Attachment D ZA08-015 Page 1 LANDSCAPE ADMINISTRATOR COMMENTS CONTACT: Keith Martin (817)748-8229) TREE CONSERVATION COMMENTS: 1. The submitted Grading Plan and Utility Plan does not match the previously submitted Site Plan and Tree Conservation Plan. Retaining walls are proposed throughout the development to attempt to preserve the existing trees as shown on the Tree Conservation Plan but the amount of cut across the property is too great and the amount of remaining area within the confines of the retaining walls proposed to preserve the trees is not enough to preserve an adequate amount of root area to successfully preserve the trees. Even with the construction of the retention walls, the proposed grading across the site will kill the existing trees proposed to be preserved within the interior of the development. A good example is the grading and retention wall around the 36” Oak on the northeast corner of Building #4; the tree will be sitting on a seven foot (7’) pedestal surrounded by a seven foot (7’) retaining wall located approximately three feet 3’ from the building and encasing approximately 340 square feet of surface root area. A 36” diameter trees would need a minimum of 432 square feet of surface root area maintained to preserve it if all the necessary measures were taken to properly preserve it, and it would most likely still die. The rest of the retained areas are approximately three feet above grade. 2. A water line and fire hydrant is proposed within the median on the north side of Building #3 where an existing tree is shown to be preserved. Not only can the water line not be placed through a tree but the fire hydrant would be four feet (4’) above grade. The area of 78 square feet shown to contain the existing tree within the median is also not sufficient. Please relocate the water line and the fire hydrant to another location and it is suggested that if the grade around the tree is going to change, that a sufficient amount of root zone area be maintained to properly preserve it.  Please be aware that all existing trees shown to be preserved on the City Council approved Tree Conservation Plan must be preserved and protected during all phases and construction of the development. Alteration or removal of any of the existing trees shown to be preserved on the approved Tree Conservation Plan is a violation of the Tree Preservation Ordinance and the zoning as approved by the Southlake City Council. Please ensure that the layout of all structures, easements, utilities, structures grading, and any other structure proposed to be constructed do not conflict with existing trees intended to be preserved. ENGINEERING COMMENTS CONTACT: Michelle Speaker (817)748-8274 GENERAL COMMENTS: 1. A ROW permit shall be obtained from the Public Works Operations Department for connections with the City’s sewer, water or storm drain inlets. Contact Public Works Operations at (817) 748-8082. 2. The driveways ingress and egress lanes must be 18’ in width maximum. 3. Show proposed sidewalks per the Master Pathways Plan if applicable. * Use the City of Southlake GPS monuments whenever possible. EASEMENTS: 1. Provide all necessary easements the sanitary sewer line. Easements shall be 15’ minimum. A 10 foot easement on one lot and a 5 foot easement on the second lot was to be provided for the sanitary sewer line per the meeting with the City. 2. There is an enclosure for a dumpster as well as a retaining wall shown on the utility plan to be constructed over the proposed utilities within the proposed utility easement. Case No. Attachment D ZA08-015 Page 2 WATER COMMENTS: 1. The minimum size for water lines is 8”. 2. Although the waterline easement is shown to be looped throughout the development, 45 degree bends are preferred over 90 degree bends. 3. For all commercial and industrial uses, fire hydrant shall be spaced a maximum of 300 linear feet apart, or 600 linear feet if buildings are sprinklered. * There is a 12” diameter waterline located on the north side of Southlake Blvd to serve this development. * The water meters must be located in an easement or right-of-way. * The size of the public water line tap and the size of the water meter must be the same. SANITARY SEWER COMMENTS: 1. The minimum size for sanitary sewer lines is 8”. All sanitary service lines must connect to a public sanitary system line that is built to City standards. * All sewer lines in easements or ROW must be constructed to City standards. * There is an 8” diameter sewer line located on the north side of Southlake Blvd to serve this development. DRAINAGE COMMENTS: 1. The difference between pre and post development runoff shall be captured in the detention pond(s). The proposed detention pond shall control the discharge of the 2, 10 and 100 year storm events when detailed plans are prepared . Detention may be required with any new proposed building construction. Describe how increased runoff from site is being detained. Access easements are needed for maintenance of the detention pond. * Provide a grading plan which includes drainage arrows and 2’ or 5’ contours. Contours may be obtained from the City of Southlake. * This property drains into a Critical Drainage Structure and requires a fee to be paid prior to beginning construction. * The drainage from this development is generally to the south west. There is an existing 30” storm sewer pipe located on the south west corner to serve this development. * The discharge of post development runoff must have no adverse impact on downstream properties and meet the provisions of Ordinance # 605. INFORMATIONAL COMMENTS: * Submit civil construction plans (22” X 34” full size sheets) and a completed Construction Plan Checklist directly to the Public Works Administration Department for review. The plans shall conform to the most recent construction plan checklist, standard details and general notes which are located on the City’s website. * An access permit from TxDOT is required prior to construction of a driveway on FM 1709, FM 1938 or SH 114. Submit application and plans directly to TxDOT for review. * A ROW permit shall be obtained from the Public Works Operations Department (817) 748-8082 to connect to the City’s sewer, water or storm sewer system. * A Developer’s Agreement may be required for this development and may need to be approved by the City Council prior to any construction of public infrastructure. Construction plans for these improvements must be acceptable to Public Works prior to placing the Developer’s Agreement on the City Council agenda for consideration. * Any hazardous waste being discharged must be pretreated Ordinance No. 836. * This review is preliminary. Additional requirements may be necessary with the review of construction plans. Case No. Attachment D ZA08-015 Page 3