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HomeMy WebLinkAboutStaff Review Comments (2) ENGINEERING REVIEW COMMENTS No. 1 These comments are in regard to the Water System Analysis provided for Shenandoah Ph. 10 -17. This report is required as part of the construction document submittal. The report is not accepted as submitted. 1. The analysis provided is inadequate. It only considers one fire scenario. The report does not address fire events in other areas. A fire event at the end of Beckley Court would require 1500 gpm from hydrant 59 because only one hydrant is within 500 feet. The same would be for all cul -de -sacs off Newport Lane. The required fire flow can be split between two hydrants if the fire event can be covered by two hydrants. In a residential area each hydrant would have to be within 500 feet of the event. If a hydrant is more than 500 feet from a fire event the flow to that hydrant cannot be considered in the analysis. The report can model all hydrants at 1500 gpm or show how each area is covered by what hydrant and how the flow was split accordingly. Reviewed by: Spencer Thompson Date: June 24, 2004 NOTE: Any changes made to the plans, that have not been requested by the City of College Station, must be explained in your next transmittal letter and "bubbled" on your plans. Any additional changes on these plans that have not been pointed out to the City of College Station will constitute a completely new review. Page 2 of 2 STAFF REVIEW COMMENTS NO. 2 Project: SHENANDOAH PH 13 (FP) - 04- 00500131 ENGINEERING 1. Provide public sidewalk along Waynesboro Court to greenway. 2. One concern has been that Waynesboro Court intrudes into the floodplain /creek channel too much. This can be addressed on the construction plans. 3. The Water, Sewer and Drainage Reports need to be approved and accepted for full compliance. 4. Provide off -site easements needed for construction. 5. Electrical comments provided again here for clarity. The off -site easement is necessary to serve this development with power. This easement is required as a condition of approval for this plat. Reviewed by: Spencer Thompson Date: June 22, 2004 ELECTRICAL 1. Developer installs conduit per city specs and design. 2. Developer provides 30' of rigid conduit for riser poles. Developer installs first 10'. City installs remainder. 3. Developer installs pull boxes and pour necessary concrete j -box pads or switchgear pads as per city specs and design.(pull boxes provided by the city). 4. Developer provides digital AutoCAD 14 version of plat and /or site plan. Email to tmichalsc cstx.gov 5. Developer provides easements for electric infrastructure as installed for electric lines (including street lights). Contact Tony Michalsky (979- 764 -3438) for a copy of electric design plan so additional easements can be added to Final Plat. 6. Will need PUE along future Newport Lane from Southern Plantation to Barron Rd to be able to provide electric service to this phase of the development. An electric power line will be extended along Newport Lane between proposed park and Phase 13. 7. Developer installs street lights per city design and specs. (Dark Bronze Pole with cobra head cutoff type fixtures.) 8. College Station Utilities will provide Electric Distribution design plan to developer for installation of electric infrastructure. Contact Tony Michalsky at (979- 764 -3438) for copies. Reviewed by: Tony Michalsky Date: 5 -26 -04 NOTE: Any changes made to the plans, that have not been requested by the City of College Station, must be explained in your next transmittal letter and "bubbled" on your plans. Any additional changes on these plans that have not been pointed out to the City, will constitute a completely new review. 2 of 2 STAFF REVIEW COMMENTS NO. 1 Project: SHENANDOAH PH 13 (FP) - 04- 00500131 Plat Comments: Comments pertaining to construction documents to be returned at a later date. Comments provided at this time are to help in ensuring the required infrastructure will comply with all City regulations. ENGINEERING 1. Construction documents show off -site construction of Southern Plantation on adjacent property. Provide required easement or ROW dedication information. 2. Construction documents show off -site construction of sewer line to future Phase 14. Provide required easement dedication information. 3. Numerous sewer lines are shown to be constructed deeper than 6 -ft. According to City Standards the easements covering these lines are required to be 20 -ft. Show easements on plat as such if lines are intended to be constructed deeper than 6 -ft. If easement provided is less than 20 -ft, line will be restricted to 6 -ft depth. 4. Construction documents show Waynesboro Court to exceed slope minimum requirements. In addition, the earthen slope at the end of cul -de -sac is not sufficiently shown in order to approve it's proximity near the creek channel. If this affects the plat, ROW location or other, make adjustments on plat accordingly. Why is cul -de -sac being constructed so close to the creek channel? It appears the ROW can be pulled back from creek channel and stick out into it. 5. It is the Applicants responsibility to ensure this plat and required infrastructure comply with all City regulations. Reviewed by: Spencer Thompson Date: June 7, 2004 ELECTRICAL 1. Developer installs conduit per city specs and design. 2. Developer provides 30' of rigid conduit for riser poles. Developer installs first 10'. City installs remainder. 3. Developer installs pull boxes and pour necessary concrete j -box pads or switchgear pads as per city specs and design.(pull boxes provided by the city). 4. Developer provides digital AutoCAD 14 version of plat and /or site plan. Email to tmichals(a�cstx.gov 5. Developer provides easements for electric infrastructure as installed for electric lines (including street lights). Contact Tony Michalsky (979- 764 -3438) for a copy of electric design plan so additional easements can be added to Final Plat. 6. Will need PUE along future Newport Lane from Southern Plantation to Barron Rd to be able to provide electric service to this phase of the development. An electric power line will be extended along Newport Lane between proposed park and Phase 13. 7. Developer installs street lights per city design and specs. (Dark Bronze Pole with cobra head cutoff type fixtures.) 8. College Station Utilities will provide Electric Distribution design plan to developer for installation of electric infrastructure. Contact Tony Michalsky at (979- 764 -3438) for copies. Reviewed by: Tony Michalsky Date: 5 -26 -04 NOTE: Any changes made to the plans, that have not been requested by the City of College Station, must be explained in your next transmittal letter and "bubbled" on your plans. Any additional changes on these plans that have not been pointed out to the City, will constitute a completely new review. Page 2 of 2 STAFF REVIEW COMMENTS NO. 2 Project: SHENANDOAH PH 13 (FP) - 04- 00500131 ENGINEERING 1. Provide public sidewalk along Waynesboro Court to greenway. 2. One concern has been that Waynesboro Court intrudes into the floodplain/ creek channel too much. This can be addressed on the construction plans. 3. Address other construction comments. 4. The Water, Sewer and Drainage Reports need to be approved and accepted for full compliance. 5. Provide off -site easements needed for construction. 6. Electrical comments provided again here for clarity. The off -site easement is necessary to serve this development with power. This easement is required as a condition of approval for this plat. Reviewed by: Spencer Thompson Date: June 22, 2004 ELECTRICAL 1. Developer installs conduit per city specs and design. 2. Developer provides 30' of rigid conduit for riser poles. Developer installs first 10'. City installs remainder. 3. Developer installs pull boxes and pour necessary concrete j -box pads or switchgear pads as per city specs and design.(pull boxes provided by the city). 4. Developer provides digital AutoCAD 14 version of plat and /or site plan. Email to tmichals a@,cstx.gov 5. Developer provides easements for electric infrastructure as installed for electric lines (including street lights). Contact Tony Michalsky (979- 764 -3438) for a copy of electric design plan so additional easements can be added to Final Plat. 6. Will need PUE along future Newport Lane from Southern Plantation to Barron Rd to be able to provide electric service to this phase of the development. An electric power line will be extended along Newport Lane between proposed park and Phase 13. 7. Developer installs street lights per city design and specs. (Dark Bronze Pole with cobra head cutoff type fixtures.) 8. College Station Utilities will provide Electric Distribution design plan to developer for installation of electric infrastructure. Contact Tony Michalsky at (979- 764 -3438) for copies. Reviewed by: Tony Michalsky Date: 5 -26 -04 1 . 1 \ . . 1 VIS McCLURE & BROWNE �r i . ENGINEERING /SURVEYING, INC. �. , �� 1008 Woodcreek Drive, Suite 103 •College Station, Texas 77845 O (979) 693 -3838 • Fax (979) 693 -2554 • Email: mcclure@tca.net ( b/ ' \3 July 6, 2004 Bridgette George Assistant Development Manager Development Services, City of College Station College Station, TX 77840 Re.: Shenandoah Subdivision, Phase 12 & 13 Construction Documents Revisions per City's Staff Comments #1 dated June 15, 2004. Dear Ms. George: Below is the summary of the revisions made per the staffs comments. ENGINEERING: Comment #1: Note: Subdivision regulations require submittal of construction documents as follows: "When filed (with the city), the plat shall be accompanied by the construction documents as prescribed below, in duplicate, and bearing the seal and signature of a registered professional engineer. All shall be in accordance with city engineering standards ACTION: Duly noted. Comment #2: Note. One Development Permit has been requested for these two phases. The City's issuance of a Letter of Completion /Acceptance will be dependant on completion of both phases. ACTION: Duly noted. Comment #3: Comments concerning utility easements have been previously returned with plat. Comments not repeated here. ACTION: Utility easements shown in the plans have been adjusted as requested with final plats. Comment #4: General Note. Water line sizes 6 -in thru 12 -in are required to be AWWA C -909. ACTION: One note in the plans was found to show AWWA C -900. The note has been updated to show AWWA C -909. T Comment #5: General Note. Remove all references to yp Type-I and/or Type-II Fire Hydrant. ACTION: All references to Type I and Type 11 Fire Hydrants have been removed. Comment #6: General Note. Provide full sidewalk width wherever recessed stormwater inlets reduce full 6 -ft sidewalk clear width. ACTION: The plans have been revised to show the extra width at the inlets. Comment #7: Sheet 1. Change reference in Construction Notes to read "BCS Unified Design Manual" when referring to water and wastewater construction. ACTION: The plans have been revised to show this change. Comment #8: Sheet 1. Strike Note 7. All construction must comply with City design requirements, details and specifications. No relief of this requirement has been granted at this time. It is the responsibility of the Engineer to ensure plans meet City requirements. ACTION: The plans have been revised to show this change. Comment #9: Sheet 1. In order to meet City design criteria for the entire subdivision, the water line along Halifax Drive should be an 8 -in line. See BCSUDGM, Maximum Lengths of Water Lines concerning 6 -in lines. ACTION: The water line has been changed to an 8 -in. Comment #10: Sheet 1. Proved turnaround at end of Martinsville Lane. ACTION: The plans have been revised to show this change. Comment #11: Sheet 2. Sheet shows items off -site. No construction easement submitted with plans. Remove or relocate silt fence and Southern Plantation Drive intersection as shown. ACTION: Southern Plantation Drive has been revised to stop short of the property line. Silt Fence around Waynesboro Court has been moved inside of the Phase 13 boundary. Comment #12: Sheet 2. Show sidewalk down Waynesboro Court from Hallifax Drive to Proposed Greenway Dedication area. This requirement will be addressed at the P &Z meeting when the Final Plat is presented. ACTION: The sidewalk has been added to the plans. Comment #13: Sheet 4. Show slope of terrain at end of Petersburg Court ACTION: Existing ground contours have been added to the sheet near the cul- de -sac of Petersburg Court. Comment #14: Sheet 4. Slope of Waynesboro Court cul -de -sac at end exceeds maximum allowed. ACTION: The slope of the Waynesboro Court near the end of the cul -de -sac is approximately 5.5 %. This less than the maximum slope allowed by the Subdivision Regulations for residential streets (8 %). The profile of the street is distorted because it is drawn based on centerline stations. The plan view of Waynesboro Court shows contour grading which shows the true slope of the cul -de -sac. Comment #15: Sheet 4. Show slope of terrain at end of Waynesboro Court cul -de- sac beyond ROW. ACTION: A detailed grading plan has been added to this sheet showing the proposed grading and existing contour data at the end of the cul- de -sac. Comment #16: Sheet 5. Provide full sidewalk width where recessed stormwater inlet reduces full 6 -ft sidewalk clear width. ACTION: See Comment #6. Comment #17: Sheet 6. Provide additional sidewalk width where recessed stormwater inlet reduces full 6 -ft sidewalk clear width. ACTION: See Comment #6. Comment #18: Sheet 6. Remove off -site roadway construction or provide easement. ACTION: See Comment #11. Comment #19: Sheet 7. Provide construction easement for construction of stormwater line along property boundary. ACTION: The storm drain along the west property line is in a 15' PUE and PDE. The adjoining property is a City Park so no construction easement is necessary. Comment #20: Sheet 8. Plan view shows Ex. 8" W/L inaccurately. ACTION: The Ex. 8" W/L is labeled correctly. The linetype has been changed per your request. Comment #21: Provide additional information showing how construction of manhole in existing sewer line will meet City and State standards. PUE on adjacent lot in process of being completed. ACTION: A note has been added to the plans that the contractor shall verify depth/location of pipe prior to construction. If a conflict arises the contractor will notify the engineer. Comment #22: Sheet 9. Slope on sewer does not meet City standards. Minimum slope on 6 -in sewer is 0.8 %. ACTION: The plans have been revised to show this revision. Comment #23: Sheet 10. Provide survey information for all sewer lines in and out of existing manhole at Sta 123 +68.79. ACTION: The plans have been revised to show this revision. Comment #24: Sheet 10. Slope on sewer does not meet City standards. Minimum slope on 6 -in sewer is 0.8 %. ACTION: See Comment #22. Comment #25: Provide sidewalk along Waynesboro Court to comply with Subdivision Regulations 8.M.1. It is City staffs opinion the sidewalk requirement in this location applicable. ACTION: See comment #12. Comment #26: Sheet 10. How is manhole lid in cul -de -sac to be constructed with extreme slope in pavement shown on Sheet 4? ACTION: As noted in the Action for Comment #14, the slope Waynesboro Court near the manhole is only 5 %. The difference in pavement elevation across the manhole will only be 0.12'. The pavement can easily be "warped" by the contractor around the manhole top to be level and smooth. Comment #27: Sheet 11. Easement for S -6 off -site portion not provided to date. Remove or provide easement dedication information. ACTION: The easement dedication was submitted with the final plat revisions. Comment #28: Sheet 11. Slope on sewer does not meet City standards. Minimum slope on 6 -in sewer is 0.8 %. ACTION: See Comment #22. Comment #29: Sheet 12. Show S -8 conflict on W -3 waterline profile. ACTION: The plans have been revised to show this change. Comment #30: Sheet S -1. Type 4 curb not approved. ACTION: The plans have been revised to show the curb as a monolithic pour. Comment #31: Remove W/WW details not City approved. Provide City details from BCS Unified Design Manual or refer to City details in plan set. ACTION: The water and wastewater details have been removed from the construction plans and a note has been added to refer to BCS Unified Details. Comment #32: Sheet S -2. Utility Crossing Detail. Revise detail for TCEQ compliance. Provide note for pressure sewer pipe as required. ACTION: The detail has been revised to show appropriate notation. Comment #33: Sheet S -3. Blow -off Assembly. See Note 26. Blow -off pipe size differs with water main size. ACTION: This detail has been removed from the plans since it is a standard BCS Unified Detail. (See Comment #32). Comment #34: FYI to Design Engineer for contractor. See page 6 of BCSUDGM. "All bends and fittings producing a change in alignment greater than the deflection allowance of this manual shall be restrained to the pipe and blocked to undisturbed soil. In addition, the pipe itself shall be restrained for a minimum of 2 joints on either side of the alignment change." This may affect contractor costs. You may wish to add a note. City inspectors are required to inspect for compliance. ACTION: Duly noted. Comment #35: Water Report, Sewer Report and Drainage Report have not been reviewed for compliance. All reports are sealed by an Engineer as being in compliance. Reports will be checked as soon as time allows. If you know any reason these reports are not in compliance with the International Fire Code, TCEQ, BCS Unified Design Manual or other government agency, please notify City staff as soon as possible. Subsequent Comment #1 regarding the Water Report (June 24, 2004) The analysis provided is inadequate. It only considers one fire scenario. The report does not address fire events in other areas. A fire event at the end of Beckley Court would require 1500 gpm from hydrant 59 because only one hydrant is within 500 feet. The same would be for all cul -de -sacs off Newport Lane. The required fire flow can be split between two hydrants if the fire event can be covered by two hydrants. In a residential area each hydrant would have to be within 500 feet of the event. If a hydrant is more than 500 feet from a fire event the flow to that hydrant cannot be considered in the analysis. The report can model all hydrants at 1500 gpm or show how each area is covered by what hydrant and how the flow was split accordingly. ACTION: The comments by the staff refer to future phases of Shenandoah that are not being constructed at this time. The scope of the water analysis has been reduced to only cover the system in Phases 12 & 13. This abbreviated report is being resubmitted for analysis. In it, the fire hydrants on dead end lines have been modeled at 1500 gpm and the water line sizes adjusted to accommodate that flowrate. Sincerel —� Jeff ob rtson, E.I.T. Gr uate Engineer McCLURE & BROWNE ENGINEERING /SURVEYING, INC. 031kt McCLURE & BROWNE /A-U ENGINEERING /SURVEYING, INC. 0' 43 ` 1008 Woodcreek Drive, Suite 103 • College Station, Texas 77845 (979) 693 -3838 • Fax (979) 693 -2554 • Email: mcclure@tca.net LIA July 6, 2004 Bridgette George Assistant Development Manager Development Services, City of College Station College Station, TX 77840 Re.: Shenandoah Subdivision, Phase 13 Final Plat Revisions per City Staff Comments #1 & #2 Dear Ms. George: The final plat for Phase 13 was revised per the Staff Review Comments #1 dated June 8, 2004. Two revised copies of the final plat were submitted on June 9, 2004. Staff Review Comments #2 dated June 22, 2004 was received on June 23, 2004. It has been determined that the plat is not effected by Staff Review Comments #2. Below is a response to the staffs comment letter. ENGINEERING COMMENTS NO. 1: COMMENT #1: Construction documents show off -site construction of Southern Plantation on adjacent property. Provide required easement or ROW dedication information. ACTION: The limits of construction on Southern Plantation have been revised to eliminate construction on adjoining property. COMMENT #2: Construction documents show off -site construction of sewer line to future Phase 14. Provide required easement dedication information. ACTION: The easement dedication was submitted to the City on July 2, 2004. COMMENT #3: Numerous sewer lines are shown to be constructed deeper than 6 -ft. According to City Standards the easements covering these lines are required to be 20 -ft. Show easements on plat as such if lines are intended to be constructed deeper than 6 -ft. If easement provided is less than 20 -ft, line will be restricted to 6 -ft depth. ACTION: The easements have been increased to 20 -ft where necessary. The Unified Design Guidelines require a 20'PUE for all sewer lines deeper than 4 -ft. COMMENT #4: Construction documents show Waynesboro Court to exceed slope minimum requirements. In addition, the earthen slope at the end of cul -de -sac is not sufficiently shown in order to approve it's proximity near the creek channel. If this affects the plat, ROW location or other, make adjustments on plat accordingly. Why is cul -de -sac being constructed so close to the creek channel? It appears the ROW can be pulled back from creek channel and stick out into it. ACTION: The City's current Subdivision Regulations set the minimum and maximum slopes for local roads at 0.6% and 8.0 %, respectively. No slopes on Waynesboro Court exceed these values. A grading plan for the end of the cul -de -sac has been added to the plans to show that the construction will not effect the creek. The street is being constructed as shown in order to provide minimum lot depth on Lot 7, Block 38. COMMENT #5: It is the Applicants responsibility to ensure this plat and required infrastructure comply with all City regulations. ACTION: Duly noted. ENGINEERING COMMENTS NO. 2: COMMENT #1: Provide sidewalk along Waynesboro Court to greenway. ACTION: The plans have been updated to show sidewalk in this location. COMMENT #2: One concern has been that Waynesboro Ct. intrudes into the floodplain /creek channel too much. This can be addressed on the construction plans. ACTION: This has been addressed with the construction document review response. COMMENT #3: The Water, Sewer and Drainage Reports need to be approved and accepted for full compliance. ACTION: See construction plan comment response. COMMENT #4: Proved off -site easements needed for construction. ACTION: The easement dedication was submitted to the City on July 2, 2004. COMMENT #5: Electrical comments provided here again for clarity. The off -site easement is necessary to serve this development with power. This easement is required as a condition of approval for this plat. ACTION: The easement dedication was submitted to the City on July 2, 2004. ELECTRICAL: COMMENT #1: Developer installs conduit per city specs and design. ACTION: The electrical infrastructure installation will comply with this requirement. COMMENT #2: Developer provides 30' of rigid conduit for riser poles. Developer installs first 10'. City installs remainder. ACTION: The electrical infrastructure installation will comply with this requirement. COMMENT #3: Developer installs pull boxes and pour necessary concrete j -box pads or switchgear pads as per city specs and design.(pull boxes provided by the city). ACTION: The electrical infrastructure installation will comply with this requirement. COMMENT #4: Developer provides digital AutoCAD 14 version of plat and /or site plan. email to tmichals @cstx.gov ACTION: A copy of the final plat will be sent once the requested revisions have been made. COMMENT #5: Developer provides easements for electric infrastructure as installed for electric lines (including street lights). Contact Tony Michalsky (979- 690 -3438) for a copy of electric design plan so additional easements can be added to Final Plat. ACTION: The plat has been adjusted to show all required easements for electrical installation. COMMENT #6: Will need PUE along future Newport Lane from Southern Plantation to Barron Rd to be able to provide electric service to this phase of the development. An electric power line will be extended along Newport Lane between proposed park and Phase 13. ACTION: The easement dedication was submitted to the City on July 2, 2004. COMMENT #7: Developer to install street lighting per city design and specs. (Dark Bronze Pole w/ cobra head cutoff type fixtures.) ACTION: The electrical infrastructure installation will comply with this requirement. COMMENT #8: College Station Utilities will provide Electric Distribution design plan to developer for installation of electric infrastructure. Contact Tony Michalsky at (979- 764 -3438) for copies. ACTION: Tony Michalsky was contacted on June 8, 2004 for a copy of the electrical design. It was sent on June 8, 2004. Sincerely, Je obertson, E.I.T. Graduate Engineer McCLURE & BROWNE ENGINEERING /SURVEYING, INC.