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Home My WebLink AboutCorrespondenceErika Bridges From: Erika Bridges Sent: Monday, October 01, 2012 9:24 AM To: 'Rabon Metcalf; Morgan Hester Cc: 'Chris Rhodes'; 'Travis Nance' Subject: RE: Staff Comments for Creek Meadows Sec 4 Ph 3A & 4 (FP) Rabon, I just discussed the access issue with Eric Dotson, and he agreed that secondary fire access can be taken through the recently completed Sec. 4, Ph. 2C. Hopefully that helps! Thanks, Erika Erika Bridges, EIT, CFM Graduate Civil Engineer Planning & Development Services 1101 Texas Avenue, College Station, TX 77842 1979)764-3570 City of College Station Home of Texas A&M University From: Rabon Metcalf [mailto:rabon(o)rmenaineer.com] Sent: Thursday, September 27, 2012 7:24 PM To: Erika Bridges; Morgan Hester Cc: 'Chris Rhodes'; 'Travis Nance' Subject: FW: Staff Comments for Creek Meadows Sec 4 Ph 3A & 4 (FP) Erika & Morgan, I received these comments. Two (2) items real quick jump out as follows: 1. Planning Comment #2: Morgan, if it is agreeable with staff please extend the application of S3/P1 till 12/31/12. The developer is hoping to cut the contractor loss on S3/P1 along with these phases once the Castlegate sewer alignments have been nailed down. However, the extra time would definitely be beneficial; 2. Engineering Comment #4 (Construction Drawings) —This is a BIG surprise. Please see the email attached. The developer moved forward based on this information. Thanks for your help and response to the two comments above. Rabon A. Metcalf, P.E. Erika Bridges From: Rabon Metcalf [rabon@rmengineer.com] Sent: Thursday, February 28, 2013 9:05 AM To: Erika Bridges Cc: Morgan Hester Subject: RE: Creek Meadows Sec.4, Ph.3A & 4 See comments below in red. Rabon A. Metcalf, P.E. k c� 7607 Eastmark Drive, Suite 252 <77840> P.O. Box 9253 College Station, TX 77842 Off: (979) 764-0704 Fax: (979) 764-0704 The information transmitted, by RME Consulting Engineers (RME), for the above referenced project is considered by RME to be confidential. This material is intended ONLYfor the use of the recipient named above and permission is not granted to the recipientfor distribution of these documents in any form orfashion. The recipient understands and agrees to RME that upon release of these documents is no longer responsible for their use or modification. The user and recipient of the documents accept full responsibility and liability for any consequences arising out of the use of these documents. From: Erika Bridges [mailto:ebridaes(@cstx.gov] Sent: Wednesday, February 27, 2013 5:58 PM To: 'Rabon Metcalf Cc: Morgan Hester Subject: RE: Creek Meadows Sec.4, Ph.3A & 4 Rabon, Those private drains are a little difficult to find on GP-01, but that will work. I do need a detail showing how the private drains will tie into the public J-boxes. This will need to be inserted into each set. Detail already shown on sheet MD-01. Also, there needs to be a note referencing how cross -lot drainage on Lots 52-63 is being handled. Let me know if you would like me to put the sets up front for you to make those revisions. Can you add a note to this sheet as follows "Building construction on Lots 52-63, Block 2 shall be graded to accommodate positive rear yard drainage to the future alley of Section 1A, Phase 4B. The revised sewer report sheet is fine. Thanks, Erika From: Rabon Metcalf [mailto:rabon@rmengineer.com] Sent: Tuesday, February 26, 2013 9:04 AM To: Erika Bridges Cc: Morgan Hester Subject: RE: Creek Meadows Sec.4, Ph.3A & 4 Ericka, Please see sheet GP-01. The private drainage system is illustrated on this sheet in plan view. Let me know if this will suffice. Also attached are the updated sheets of the water/sewer report illustrating the lift station capacity. Rabon A. Metcalf, P.E. k t r+ 7607 Eastmark Drive, Suite 252 <77840> P.O. Box 9253 College Station, TX 77842 Off: (979) 764-0704 Fax: (979) 764-0704 The information transmitted, by RME Consulting Engineers (RME), for the above referenced project is considered by RME to be confidential. This material is intended ONLY for the use of the recipient named above and permission is not granted to the recipient for distribution of these documents in any form or fashion. The recipient understands and agrees to RME that upon release of these documents is no longer responsible for their use or modification. The user and recipient of the documents accept full responsibility and liabilityfor any consequences arising out of the use of these documents. From: Erika Bridges [mailto:ebridges(atcstx.govj Sent: Monday, February 25, 2013 5:56 PM To: 'Rabon Metcalf Cc. Morgan Hester Subject: Creek Meadows Sec.4, Ph.3A & 4 Rabon, I still have a couple of comments that hopefully can get cleared up quickly. In the sets of plans for stamping, I still don't see how the private cross -lot drainage is being handled. I thought ADS pipe was going to be added and tie into junction boxes. Also, in order to approve this set up plans prior to the lift station improvements, we will need an addendum to the sewer report. It is my understanding that the proposed flows are acceptable based on use of a lower peaking factor, so that needs to be stated in the revised report, as well. Please let me know if you have any questions. Thanks, Erika Bridges, EIT, CFM Graduate Civil Engineer Planning & Development Services 1101 Texas Avenue, College Station, TX 77842 (979)764-3570 City of College Station Home of Texas A&M University City of College Station Home of Texas A&M University City of College Station Home of Texas A&M University Creek Meadows Subdivision — Section 4, Phase 3A & 4 Water & Sanitary Sewer Report RME Consulting Engineers September 5, 2012 TABLE #3 - SANITARY SEWER FLOWS Average Average 2-Hour Daily Flow Dwelling Daily Flow Peak Flow Peak Flow Section/Phase (gpd/cap) Units (gpd) (gph) (efs) Sec, 1A, Ph. 1 & 2 100 96 25,632 4,272 0.16 Sec. IB, Phase 1-4 100 112 29,904 4,984 0.19 Sec. 2, Ph IA, 1B, & 3 100 89 23,763 3,961 0.15 Sec. 4, Ph 3A & 4 100 39 10,413 1,736 0.06 Sec, 5, Ph 100 32 8,544 1,424 0.05 Sec, 4, Ph 1, 2A, 2C 1 100 73 19,491 3,249 0.12 TOTAL EXPECTED FLOWS = 117,747 19,625 0.73 Flow Determination Notes: 1) Residential density is at 2.67 capita/Dwelling Unit; 2) Commercial uses were estimated at 30 capita/acre; 3) Average Daily flows, for each use, were assigned per Table III -"Average Wastewater Generations" per the UTSDS; 4) Peaking factor of 4.0 was applied to the Average Daily Flows to determine the Peak Flow which is used for line sizing; 3.3 Hydraulic Modeling & Methodology: As allowed in the UTSDG, a hydraulic computer model was used to determined flow results for the proposed sanitary sewer collection lines. The hydraulic analysis and corresponding results were determined by using the WINSTORM hydraulic program, for stormwater modeling. Though this TxDOT program's typical use is for modeling gravity stormwater systems it can easily be applied for hydraulic modeling of gravity sewer systems. Peak sewer flows were directly inputted at manholes in lieu of flows being generated by hydrological equations at logical locations along the proposed sewer lines. 3.4 Modeling Results & Conclusions: Using the original WINSTORM model and expanding it to include Creek Meadows — Section 4, Phase 3A & 4, sanitary sewer flows were input into the proposed sewer system and it was determined that the proposed expanded system has adequate capacity. WINSTORM Hydraulic Analysis Data, as resulting from sanitary sewer analysis, is contained in this report in the "Attachment" portion. Resulting summary information is illustrated below in Table #4 — Sanitary Sewer Summary. As report above in Table #3 there are 371 dwelling units either Dlatted or nermitted for platting (which includes Section 4, Phase 3A & 4). These dwelling units will be the equivalent of 0.73 cfs (327 gpm) at Peak Flow (PF=4). Utilizing a PF=3 (PeakingFactor actor for design capacity of the lift station system) the flows are reduced to 245 gpm. The subdivision Lift Station has a firm pumping capacity of 315 gpm (and receiving s sy tem of Castle Gate) which illustrates that this flow will be acceptable for the current pumnine system. 260-0471 Water -Sewer Report-S4P3A-4 Page -6 Erika Bridges From: Stephen A. Maldonado Jr. Sent: Tuesday, March 05, 2013 4:12 PM To: Erika Bridges Subject: RE: Creek Meadows Erika, Per the 2010 Creek Meadows Lift Station Report performed by Mitchell and Morgan, a peaking factor of 3 is acceptable for the existing and proposed Creek Meadows lift station. All sanitary sewer mains within the Creek Meadows subdivision, however, should be designed to convey peak flow using a B/CS Unified Design Guideline peaking factor of 4. Thanks, Stephen A. Maldonado Jr., P.E. Utility Engineer The City of College Station Water Services Department PHONE: 979.764.5011 EMAIL: SaMaldonado@cstx.aov From: Erika Bridges Sent: Monday, March 04, 2013 5:28 PM To: Stephen A. Maldonado Jr. Subject: RE: Creek Meadows Stephen, Were you still thinking about these questions? I don't know if I heard a definitive answer on Friday. Thanks, Erika From: Erika Bridges Sent: Thursday, February 28, 2013 12:51 PM To: Stephen A. Maldonado Jr. Subject: Creek Meadows Stephen, Attached is the revision that Rabon made to the sanitary sewer report for Sec.4, Ph.3A & 4. Are we interpreting the reduced peaking factor of 3 to apply to the capacity in the downstream line, the existing & proposed lift station, and existing & future development in Creek Meadows? In short, is this an across the board reduction in the peaking factor for Creek Meadows (existing and future)? Thanks, Erika Bridges, EIT, CFM Graduate Civil Engineer Erika Bridges From: rabon@rmengineer.com Sent: Tuesday, March 05, 2013 12:55 PM To: Erika Bridges Cc: Morgan Hester Subject: RE: Creek Meadows SecA Ph.3A & 4 Yes please add the notes. Thanks. Sent from my Verizon Wireless 4G LTE Smartphone -------- Original message -------- From: Erika Bridges <ebrid es cstx.gov> Date: To: 'Rabon Metcalf <rabon c@rmengineer.com> Cc: Morgan Hester <mhester e cstx.gov> Subject: RE: Creek Meadows Sec.4, Ph.3A & 4 Hi Rabon! I received your message and just wanted to confirm that I will be able to add those notes and approve the plans this week. Please let me know if you have any questions. Thanks, Erika From: Rabon Metcalf [mailto:rabon@rmenaineer.com] Sent: Thursday, February 28, 2013 9:05 AM To: Erika Bridges Cc: Morgan Hester Subject: RE: Creek Meadows Sec.4, Ph.3A & 4 See comments below in red. Rabon A. Metcalf, P.E. 0 7607 Eastmark Drive, Suite 252 <77840> P.O. Box 9253 College Station, TX 77842 Off: (979) 764-0704 Fax: (979) 764-0704 The information transmitted, by RME Consulting Engineers (RME), for the above referenced project is considered by RUE to be cot fdential. This material is intended ONLYfor the use of the recipient named above and permission is not granted to the recipient for distribution of these documents in anyform or fashion. The recipient understands and agrees to RME that upon release of these documents is no longer responsible for their use or modification. The user and recipient of the documents accept full responsibility and liability for any consequences arising out of the use of these documents. From: Erika Bridges [mailto:ebridaes(dcstx.gov] Sent: Wednesday, February 27, 2013 5:58 PM To: 'Rabon Metcalf Cc: Morgan Hester Subject: RE: Creek Meadows Sec.4, PUA & 4 Rabon, Those private drains are a little difficult to find on GP-01, but that will work. I do need a detail showing how the private drains will tie into the public J-boxes. This will need to be inserted into each set. Detail already shown on sheet MD-01. Also, there needs to be a note referencing how cross -lot drainage on Lots 52-63 is being handled. Let me know if you would like me to put the sets up front for you to make those revisions. Can you add a note to this sheet as follows `Building construction on Lots 52-63, Block 2 shall be graded to accommodate positive rear yard drainage to the The revised sewer report sheet is fine. Thanks, Erika From: Rabon Metcalf [mailto:rabombrmengineer.com] Sent: Tuesday, February 26, 2013 9:04 AM To: Erika Bridges Cc: Morgan Hester Subject: RE: Creek Meadows Sec.4, PUA & 4 Ericka, Please see sheet GP-01. The private drainage system is illustrated on this sheet in plan view. Let me know if this will suffice. Also attached are the updated sheets of the water/sewer report illustrating the lift station capacity. Rabon A. Metcalf, P.E. 7607 Eastmark Drive, Suite 252 <77840> P.O. Box 9253 College Station, TX 77842 Off: (979) 764-0704 Fax: (979) 764-0704 The information transmitted, by RMF, Consulting Engineers (RME), for the above referenced project is considered by RMF to be confidential This malarial is intended ONLYfor the use of the recipient named above and permission is not granted to the recipient for distribution of these documents in any form or fashion. The recipient understands and agrees to RMF, that upon release of these documents is no longer responsible for their use or modification. The user and recipient of the documents accept fill responsibility and liabilityfor any consequences arising out of the use of these documents. From: Erika Bridges [mailto:ebridges(d)cstx.gov] Sent: Monday, February 25, 2013 5:56 PM To: 'Rabon Metcalf Cc: Morgan Hester Subject: Creek Meadows Sec.4, Ph,3A & 4 Rabon, I still have a couple of comments that hopefully can get cleared up quickly. In the sets of plans for stamping, I still don't see how the private cross -lot drainage is being handled. I thought ADS pipe was going to be added and tie into junction boxes. Also, in order to approve this set up plans prior to the lift station improvements, we will need an addendum to the sewer report. It is my understanding that the proposed flows are acceptable based on use of a lower peaking factor, so that needs to be stated in the revised report, as well. Please let me know if you have any questions. Thanks, Erika Bridges, EIT, CFM Graduate Civil Engineer Planning & Development Services 1101 Texas Avenue, College Station, TX 77842 (979)764-3570 City of College Station Home of Texas A&M University City of College Station Home of Texas A&M University City of College Station Home of Texas A&M University City of College Station Home of Texas A&M University