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Home My WebLink AboutPreliminary Plat Oak Lake EstatesCity of College Station POST OFFICE BOX 9960 I IOI TEXAS AVENUE COLLEGE STATION, TEXAS 77840·2499 October 3, 1984 MEMORANDUM PRESUBMISSION CONFERENCE Attending: Al Mayo, Director of Planning ~ ~ Mark Smith, Ass•t. City Engineer~ Joe Guidry, Electrical Superintendent Jim McCord, Elec. Power Engrs. David Ri 1 ey, GTE Shirley Volk, Planning Technician Don Garrett, Garrett Engineering SUBJECT: Preliminary Plat -Oak Lake Estates (84-313) A Presubmission Conference was held on this date to review the above men- tioned plat, and staff recommends approval with the following conditions:'': 1. Show R.O.W. widths. 2. Include curve data. 3. Indicate lot dimensions, 4. Change Lots 11 & 12 to ''llR & 12R11 • *Any changes to an approved plat must be cleared through the off ice of the Director of Planning, SUBMIT 10 COPIES OF REVISED PLAT PLUS REPRODUCEABLE COPY TO PLANNING DEPART- MENT BY 5:00 P.M. OCTOBER 12th TO BE INCLUDED ON P&Z AGENDA OCTOBER 18th. sjv 1 April 18, 1985 Don Garrett Garrett Engineering P. 0. Box 4063 Bryan, Texas 77805 City of College Station POST OFFIC E BOX !J960 110 1 TC.XAS AVl"'.N l JC. COLLEGE ST1\T ION. TEXAS 77840-2499 RE: Paving and Drainage Plans for Oak Lake Estates Subdivision Dear Don: I have again reviewed the above plans and reiterate the following corrments made earlier after my first review: 1.A. The stonn drainage pipes appear to be too small to accorrmodate the five year design stonn required in Section 8-P of the Subdivision Regulations, Ordinance No. 690. The City requires a minimum 24" diameter for all stonnwater piping. Please sul:Jni t the drainage calculations you used to determine the size of your stonnwater culverts for my consideration. How will backwater caused by the restricted drainage channels affect upstream properties? How will the velocity of the water exiting the pipes be dissapated to prevent erosion at the discharge end? 2.A. The current policy standard for rural minor street cross-section configuration requires 4 ft. shoulders on each side and an all weather surface. The current ordinance requires 10 ft. wide shoulders on each side with a two course inverted penetration surface as a minimum. I have waived the 10 ft. shoulder requirement, however a minimum shoulder of 4 ft. is required to protect the edge of the roadway and provide some minimal space for parking. The following comnents must also be addressed: 1.B. The drainage easements at the ends of your culvert locations, required to provide construction and maintenance space, must be shown on the plat to be of any value to the public entity responsible for their maintenance. 2. B. The longitudinal slope you are showing along your roadway from 11+0 to near 15+0 and 40+0 to near 43+0 are much below the minimum 0. 4 per- cent permitted by the subdivision ordinance. I can only assume that your ditch grades are fol lowing a similar slope in which case the water wi 11 not flow but will stand in the ditches and become a maintenance problem. I cannot evaluate this situation, nor can a contractor build it without street cross- sections being a part of the contract documents. 3.8. The typical cross-section you are showing apparently has no crown in it. City streets carry a minimum two percent (2%) crown. I recorrmend you consider a little more · than that for rural situations, say two and one- hal f percent (2.5%) to three percent (3%). 4.8 The culvert configuration you are showing at Station 14+50 and Section C-C will cause considerable problems. The super critical slope you show on the upper end will not increase the pipes carrying capacity. It will only cause backwater and partical sediment on the flat portion of the pipe, thereby greatly restricting the pipes capacity to carry any water. I recorrmend you consider a drop structure on the upstream end if necessary but do not break slope midway through the pipe. 5 .A. How do you intend to stabilize the side slopes of your cuts and fills that are greater than six percent (6%)? As evidenced fran the attempt of the SDHPT along State Highway 6 near Hearne, seeding alone will not hold on a slope as flat as 6 to 1. If seeding does not stay, the ditches will soon fill in and the roadway will deteriorate from lack of drainage. Items 1.A., 2.A., 1.8. and 4.8 must be revised before I can approve these drawings for construction of a public street. Sincerely, cc: Planning File (84-313) DJP: vw February 28, 1985 Garrett Engineering Mr. Don Garrett P. 0. Box 4063 Bryan, Texas 77805 City of College Station POST OFFICE BOX 9960 1101 TEXAS AVENUE COLLEGE STATION, TEXAS 77840-2499 RE: Paving and Drainage Plans for Oak Lake Estates Subdivision Dear Don: Since the street project you have submitted serves less than twenty-four residential units it is considered a residential street and must comply with the geometric standards of the subdivision ordinance of this City for such a street. The utility easements and lot line numbers must be added to the plan and profile sheets for clarity. Headwall details are required for pipe crossings. I suggest your engineer draw up street/cross sections at the ends of the cross pipes to help get a feel for the severity of the side slopes and how the headwalls match in. If corrogated metal pipe is used for cross pipe drainage, care should be taken with the backfill materials and the material the pipe sits on. Drainage pipe should have a fifty year service life. In our soils typically with resistivities from 500 to 1,000 ohm-cm. and ph values from 5.8 to 6.8, the minimum thickness of pipe should be 10 gauge unless protective coatings are used to increase the service life and decrease the thickness. There is a very large error margin between the elevations you submitted as contours on the preliminary plat and those shown on the profile, as much as 15 feet in one area near station 15. That magnitude of difference is not within reasonable limits and should be staunchly avoided on future submittals . I have returned the marked-up street project drawings. Please correct the problems I have outlined as well as those marked in red on the drawings and return the revised set as well as the marked up set to my office for reconsideration. Sincerely, yJ~ David J. Pullen, P.E. City Engineer Encl: 1 set 11 proposed street plans for Oak Lake Estates11 cc: Planning File (84-313) .. ' _ .... . ,,.. .... ..:.;.._· February 13, 1985 Garrett Engineering Mr. Don Garrett, P.E. P. 0. Box 4063 Bryan, Texas 77805 City of College Station POST OFFICE BOX 9960 110 1 TEXAS AVENUE COLLEGE STATION, TEXAS 77840·2499 RE: Oak Lake Estates Subdivision -s·treet Development Dear Don: ·As a .result of our telephone conversation yesterday, I have reviewed the -presubmission notes for the abov~ subdivision which was held Oct. 18,. 1984. ,A~. _that time the project was approved by this office with a 60 ft. right-of-way :"arid .. 16 ft. utility easement -t~e.x'_1 county ·standard 11 • The "standard :roadway section"-in use . at that time consi.sted of a 12 ft. travel lane and 4 ft. wide _··shoulder on each side with a L 1/.2,'·inch .HMAC surface. In some ·areas of the ·'ETJ, with a leJter of agreemen1:~~from thetounty Commissioner's, we have ··.'.~lessened .the. surface requiremen:~,·l~1t.You or your client should vi.sit with the .. ::·.county if you wish to reduce ·the?'fuinimum surface requirement by this City in -. its ETJ. . ·-;;;.;', ... ,._ ... ~ r ln quickly looking over the final plat you have presented, I notice you have . -~-1".not met w.ith the minimum centerline radius dimensions or tangent length between the curbs:·· Some alterations to meet the prescribed minimums for residential streets will need to be made irf ·order for my office to consider the final plat. A more detailed review of the. proposed project will take place fo the next week and you will be contacted regarding any required alterations. Of course your client does have the option to request a .variance to any requirements of the ordinance as described in Section 5. Variances. Sincerely, ~£4J City Engineer DJP: vw February 28, 1985 Garrett Engineering Mr. Don Garrett P. 0. Box 4063 Bryan, Texas 77805 City of College Station POST OFFICE BOX 9960 110 1 TEXAS AVENUE COLLEGE STATION, TEXAS 77840-2499 RE: Paving and Drainage Plans for Oak Lake Estates Subdivision Dear Don: Since the street project you have submitted serves less than twenty-four residential units it is considered a residential street and must comply with the geometric standards of the subdivision ordinance of this City for such a street. The utility easements and lot line numbers must be added to the plan and profile sheets for clarity. Headwall details are required for pipe crossings. I suggest your engineer draw up street/cross sections at the ends of the cross pipes to help get a feel for the severity of the side slopes and how the headwalls match in. If corrogated metal pipe is used for cross pipe drainage, care should be taken with the backfill materials and the material the pipe sits on. Drainage pipe should have a fifty year service life. In our soils typically with resistivities from 500 to 1,000 ohm-cm. and ph values from 5.8 to 6.8, the minimum thickness of pipe should be 10 gauge unless protective coatings are used to increase the service life and decrease the thickness. There is a very large error margin between the elevations you submitted as contours on the preliminary plat and those shown on the profile, as much as 15 feet in one area near station 15. That magnitude of difference is not within reasonable limits and should be staunchly avoided on future submittals. I have returned the marked-up street project drawings. Please correct the problems I have outlined as well as those marked in red on the drawings and return the revised set as well as the marked up set to my office for reconsideration. Sincerely, y,.,.J~ David J. Pullen, P.E. City Engineer Encl : 1 set "proposed street plans for Oak Lake Estates" cc : Planning File (84-313) TO GARRETT ENGINEERING 1520 Cavitt Avenue P. 0. Box 4063 BRYAN,TEXAS77805 (713) 822-5387 822-5487 CITY DF ATTENTION RE: WE ARE SENDING YOU d' Attached O Under separate cover via ___ ~ _____ the following items: O Prints O Plans · 0 Samples D Specifications 0 Shop drawings 0 Copy of letter O Change order o _____________________ _ COPIES DATE NO. DESCRIPTION 1/<91;sl'n O/J K L/J /::!.c €.STAT€S %t:L/ M'I N.4 ~ l( PLJqy-, /13. 619. Nr ....S / / l t:::: €,,,cJ J A , / , THESE ARE TRANSMITTED as checked below: ~ For approval O For your use O As requested 0 Approved as submitted 0 Approved as noted 0 Returned for corrections 0 Resubmit __ copies for approval 0 Submit __ copies for distribution 0 Return __ corrected prints O For review and comment 0 ------------------------ O FOR BIDS DUE _________ 19 ___ 0 PRINTS RETURNED AFTER LOAN TO US - REMARKS--------------------------------------- PRODUCT 140-1 (NE:iiSJ Inc., GnAon. Mm. 01'11 If enclosures ere not es noted, lcindly notify us et once. P&Z CASE NO. 1'1 -.3 /3 DATE RECEIVED CJ/e:<,t /fl , I APPLICATION FOR REVIEW AND APPROVAL MASTER PRELIMINARY PLAT x PRELIMINARY PLAT ------- SUBMISSION OF THIS APPLICATION IS NOT COMPLETE UNTIL PLATTING FEES ARE PAID AND ALL REQUIREMENTS OF ORDINANCE NO. 690, SUBDIVISION REGULATIONS, HAVE BEEN MET. MINIMUM REQUIREMENTS: 1. Filing fee: $1U.OO per plat plus $0.25 per lot ; or $2.00 per acre for multiple dwell Ing areas, commercial, and/or Industrial districts and other areas not subdivided Into lots. (Payable at Tax Office; receipt to accompany application. 2. Appl I cation completed In full. 3.· Ten (10) copies of Plat plus sepia of same drawn to a scale of not less than 100 feet per Inch. The words 11PRELIMINARY PLAT -NOT FOR RECORD" shal 1 appear on the plat in letters 1/2" high. Date of plat and dates of any revisions shall legibly appear on plat. DEADLINE: Received In Planning Department 20 days prior to Planning and Zoning Commission (P&Z) meeting. Regular meetings held first and third Thursdays of each month. PLEASE PRINT OR TYPE. NAME OF SUBDIVISION Oak Lake Estates OWNER Ch a r 1 es E . Arno 1 d AGE NT Garre t t Engine e r i n g ADDRESS Arli n gton , Texas ADDRESS 444 4 Carter Creek Pk wy . Suite 108 Brya n , Texas 77801 PHONE ( 409) 846 -2688 LICENSED SURVEYOR OR ENGINEER Donald D . Ga r rett -----------------~-------- ADDRESS 4444 Carter Cr eek Pa r kway Suite 108 B r yan~Tx . PHONE ( 409) 846 -2688 SPECIFIC LOCATION OF PROPOSED SUBDIVISION Block 1 Lots 1 -9 , and ~---~--------------- Block 2 , L ots 1 , 2 , 11 , and 12 . behind Quail Run Estates REQUESTED VARIANCES TO ORDINANCE NO. 690 No ne ---'-------------------- THE UNDERSIGNED HEREBY REQUESTS STATION OF THE ABOVE IDENTIFIED PLAT: Tit le ---'E""'"n__.g....__i _n"""'e-'e_r _____________ Date q I 2 8 I 8 4 Rev .8/84 City of College Station POST OFFICE BOX 9960 1101 TEXAS AVENUE COLLEGE STATION. TEXAS 77840·2499 October 3, 1984 MEMORANDUM PRESUBMISSION CONFERENCE Attending: Al Mayo, Director of Planning ~ ~ Mark Smith, Ass•t. City Engineer~ Joe Guidry, Electrical Superintendent Jim McCord, Elec. Power Engrs. David R i 1 ey, GTE Shirley Volk, Plannrng Technicran Don Garrett, Garrett Engineering SUBJECT: Preliminary Plat -Oak Lake Estates (84-313) A Presubmission Conference was held on this date to review the above men- tioned plat, and staff recommends approval with the following conditions:* 1. Show R.O.W . widths . 2. Include curve data. 3. Indicate lot dimensions, 4. Change Lots 11 & 12 to 11 11R & 12R11 • *Any changes to an approved plat must be cleared through the office of the Director of Planning , SUBMIT 10 COPIES OF REVISED PLAT PLUS REPRODUCEABLE COPY TO PLANNING DEPART- MENT BY 5:00 P.M. OCTOBER 12th TO BE INCLUDED ON P&Z AGENDA OCTOBER 18th. sjv ASTERWOOD \ r-.J AIRPORT ~-$ -LPCATID-9! D • ~ ( l ! ?"( ( ~ i (~ ~ ~ . " I '---.. < ~ /-51'~-~ . i . I \ ~ ~I •ITEM NUMBER •CASI! NUMBER 84-313 •SCAL& 1 11 :2000 1 •TYPE OF CASE PRELIMINARY '\ F. ) . . M. 21 ('--.J ( City of College Station POST OFFICE BOX 9960 1101 TEXAS AVENUE COLLEGE STATION, TEXAS 77840·2499 October 3, 1984 MEMORANDUM PRESUBMISSION CONFERENCE Attending: Al Mayo, Director of Planning ~ Mark Smith, Ass't. City Engineer SUBJECT: Joe Guidry, Electrical Superintendent Jim McCord, Elec. Power Engrs. David Riley, GTE Shirley Volk, Planning Technician Don Garrett, Garrett Engineering Preliminary Plat -Oak Lake Estates (84-313) A Presubmission Conference was held on this date to review the above men- tioned plat, and staff recommends approval with the following conditions :* 1. Show R.0 .W. widths. 2. Include curve data. 3. Indicate lot dimensions, 4. Change Lots 11 & 12 to 1111R & 12R11 • *Any changes to an approved plat must be cleared through the off ice of the Director of Planning , SUBMIT 10 COPIES OF REVISED PLAT PLUS REPRODUCEABLE COPY TO PLANNING DEPART- MENT BY 5:00 P.M. OCTOBER 12th TO BE INCLUDED ON P&Z AGENDA OCTOBER 18th. sjv