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HomeMy WebLinkAboutCENTRE AVENUE EXTENSION - Filed CS-COMMENT SHEETS - 2003-11-04Current Planning DATE• Juiv 14 1998 PROJECT COMMENT SHEET DEPT: TO PROJECT: Center Avenue (extension of existing Centre Avenue) PLANNER: ENGINEER: Dave Stringer All comments must be received by: August 4, 1998 TO of Ft Collins ,wontld look at doing some kind of joint trench with Ft. Collins Light and Power if they are doing a trench. Date: Signature-4 /'� CHECK HERE IF, YOU WISH TO RECEIVE COPIES OF REVISIONS Plat -'�tiite _Drainage Report _Other ,�FItility _Redline Utility -- :kkandscape M City of Fort Collins Current Planning DATE: July 14, 1998 PROJECT COMMENT SHEET DEPT: PSCO PROJECT: Center Avenue (extension of existing Centre Avenue) PLANNER: ENGINEER: Dave Stringer A11 comments must be received by: August 4, 1998 Aw tj GA? EXtEnrrtonl Wow Tn gE CoonDtr.lA7Ed gY �i.K- T(LFtynto2� PS6o PLA,J�jE2 Z2S--7S2% STt-&,,) C-res Ti{-� pKoPosc� ExT€�lonl c�F C�� 7�vC A� �P�oXlvr��t.y �}-� t�U Ti+ls LtN>< MAY %�QU(,Q.+✓ (gut r a I jv R, l o�hi zowl f-T,(, IF 4� flA I E-S oa sf € ItJSTA-U-pT1onI )Z%Q�tV2 S INE NOT•= ©N (ZcS?EtPVE --,f4e�r, /.rpTE rN L'x�. NOrLs Date: a Signature: CHECK HERE IF YOU WISH TO RECEIVE COPIES OF REVISIONS Plat Site _Drainage Report _Other _Utility _Redline Utility _Landscape 0 PROJECT _� COMMENT SHEET City of Fort Collins Current Planning DATE: August 3, 1998 DEPT: Engineering PROJECT: Centre avenue extension at CSURF PLANNER: ENGINEER: Dave Stringer c�� SIB 98 All comments must be received by: 814198 ® No Problems Problems or Concerns (see below or attached) 1. Dedicate ri hts- of - way and easements with thisplat- c-swKe Dmi inic-, rYs .no 2. Remove HOA from general notes - W-er.+wm. 3. Show roadwa and R.O.W. widths on street plans - ALznQE=> 4. Manholes appe:ar to be in curb and gutter - Fv.�ED Aexl*%vl, Zb DA-e S 13 99. see Aiczo SH. i 5. Lessen contrast of under round utilities on street plans TYP - aeoum K,o• 6. Sow storm sewer pipes in profile section when crossing the roadway prism - 5e 7. Reference stonrn sewer plans on roadway plans - I�ooED . 8. Whit are slop es and widths of bike trail connections do they meet ADA standards? lo' zs 9. Is let turn bav needed at Bay Street? - FokHo4sAN& RVARTMBN75 NeEatm Fbm- silzmD.s pbvx 10. Show R.O.W., slo e and utili easements in cross sections TYP - Apa � 11. Maxiinum s o le is 4:1 TYP - Aoom tn6eZS (-Trv) 12. Note to use Georgetown brick on parapet walls - cF ntUev . 13. Sheet 28,29 and 30 of 48 see notes - s z�esioNs . 14. Veri F de th cf cover on storm sewer boxes, pipe crossin s etc.- Aou� un _. I any S low water air Te le Va V8S i❑ etai Ut ocations are not i❑ icate on an view- A vogm 16. Address additional comments as noted on plans 17. Submit redline blue lines with next submittal - o-K . Date: 7-30 Signature: 5 PLEASE Sr-`dD COPIES OF MARKED REVISIONS: PLAT ITE ITY SCAPE 0 PROJECT COMMENT SHEET City of Fort Collins ENGINEERING DATE: September 16, 1998 DEPT: ENGINEERING PROJECT: CENTRE AVE EXTENSION PLANNER: Ted Shepard ENGINEER: Dave Stringer Plat: Is the right - of- way from the existing Research Bldv. to the East Line of the southwest quarter been recorded as access easement? If so this needs to platted as right - of- way. -rq wvb RE7CtR0ED AS I+T- bF-WRy. 1. Storm sewer crossing at Sherwood Laterial as shown is not acceptable. Manholes are in the pavement section. If the storm sewer cannot be relocated then the section of pavement from approximately station 31+00 to 32+50 shall be concrete pavement. ENE 204 o was ,2aIsEp xN oR0c2. 10 Keap zee SYoRM S[wC'F N�Anr V4e�fc5 vvT of �L�a P4'rQ-AAEN' SECTTOIVV 2. See other minor redline comments on plan sheets. Date. Signature: PLEASE tEND COPIES OF MARKED REVISIONS: ❑ PLAT ❑ SITE ❑ UTILITY ❑ LANDSCAPE `' PROJECT COMMENT SHEET Citv of Fort Collins ENGINEERING DATE: November 2, 1998 DEPT: ENGINEERING PROJECT: CENTRE AVE EXTENSION PLANNER: Ted Shepard ENGINEER: Dave Stringer 1. Show driveway grades at NRRC site with percent slope from Centre Ave. to their parking lot. pavement. 2. Are driveway grades at Green houses ok with CSU ? 10% is steep 3. Need to add weep hole locations and details to wing walls. 4. See other minor redline comments on plan sheets. Date: t I — 2- ^ � Signature: r.� 1�s PLEASE SEND COPIES OF MARKED REVISIONS: ❑ PLAT ❑ SITE ❑ UTILITY ❑ LANDSCAPE Utilities light & power • stormwater • wastewater • water City of Fort Collins Greg Koch, Project Manager Lidstone and Anderson, Inc. 760 Whalers Way, Suite B-200 Fort Collins, Colorado 80525 November 20, 1998 Dear Greg The City of Fort Collins Stormwater Department (the City) has completed a review of your report entitled "Hydraulic Evaluation and Design of the Centre Avenue Bridge at Spring Creek, Fort Collins, Colorado (Based on the City of Fort Collins Fully -Developed Condition Hydrology)" dated November 3, 1998. The following comments are presented for your review. To save time and effort, it is suggested that you only submit the modified pages. We will incorporate these pages in the report we currently have. The comments are presented according to report section. REPORT 1. Section 1.1, Please include a brief description of the 1997 flood (Precip — 14.5 inches in 31 hours, Q at this site was 8,250 efs based on USGS indirect measurements — more than twice as large as 500- year existing condition flows, overtopping of BNRR and flooding of trailer court) Please also describe how this project was designed (blockage, worst -case scenario analysis) based on the knowledge of what occurred at this site during the 1997 flood and the heightened public awareness of flooding potential in this area. This information is critical for long-term documentation of the planning by both the City and the developer regarding this site. 2. Please provide a north arrow and scale on Figure 2.2, page 9. 3. Page 12, Sect. 3.3, last sentence, The FIS omitted a backwater area for the "500-year" not the "100- year" as stated in the text. Please verify and revise text as needed. See additional suggested wording as clarification in the text. 4. Page 13, third paragraph, last sentence, please review and modify as necessary the peak discharge into the downstream portion of the pond. Our review has the discharge at 731.5 efs. 5. Page 14, third paragraph, second to last sentence, please review and modify as necessary the calculations for the equivalent Manning's n value. Our review has the value at 0.0504. 6. Page 17, fourth paragraph, second paragraph, please review and modify as necessary the Centre Avenue embankment water surface elevation of "4994.6 ft". The Extran output has it at "4995.6 ft". 7. Page 18, Table 4.2, Return Period 10-years, Centre Avenue, Baseline, please review and modify as necessary the value 4991.6. Extran has the value at 4991.5. 8. Page 19, please expand on the reasoning behind our decision to not run a "Post -Project" SWMM with the Extran "Post -Project" results for the two ponds. It will be helpful for future reference. 9. Page 22, Table 4.6, HEC-2 Cross -Section, Channel Velocity, please review and modify as necessary the Post -Project condition for cross-section 18770, and the Baseline condition, Post -Project condition, and Change in Channel Velocity for cross-section 19337. These values do not appear to agree with the HEC-2 output. 10. Page 24, Table 4.7, HEC-2 cross-section, please replace number "18700" with "18770". 700 Wood St. • P.O. Box 580 • Fort Collins, CO 80522-0580 • (970) 22116700 • FAX (970) 221-6619 • FAX (970) 221-6593 • TDD (970) 224-6003 e-mail: utilities Ceti.fort-collins.co.us • www.ciJort-collins.co.us/UIILITIES 11. Please provide a copy of the referenced report "Spring Creek Floodplain Management Study, L&A, 1998". We still need to have the write-up on this previous work for our files. SHEET 1 — Baseline Condition Floodplain and Floodway Map 12. Please review and modify as necessary the northern portion of the area between cross -sections 17380 and 18075. The floodplain/floodway boundary/line does not appear to follow the water surface elevation 4994.7 feet. SHEET 2 and 4 13. Please adjust floodplain mapping on south side of pond to ignore the small berm in order to be consistent with the FEMA mapping (per phone conversation 11-18-98). Also please adjust the same area on Sheet 4 TECHNICAL ADDENDUM 14. Please include documentation of the calculations for the equivalent orifices representing the orifice on the southern 84" RCP at the BNRR. 15. Please explain how the initial two points on the "D/S Pond Stage -Area -Storage Curve" were developed in Section A.1 'Background Information and Calculations" (i.e., 0.06 and 0.86 ac-ft, when there is nothing under the "Sum Area" columns). 16. Please review and modify as necessary the element numbers for the orifice openings to element 12 on the `Extran Schematic Diagram —Pre-Project Condition Calibration Model" in Section A.1 "Background Information and Calculations". 17. Please show calculations/documentation of stage -discharge for the southern 84" RCP with the new grate and the bike trail culvert which were included in the stage -storage -discharge table in Section A.1 "Background Information and Calculations". 18. Please include depth -area documentation for the baseline condition for the upstream and downstream (split) ponds. 19. Please provide documentation for cross-section 18700 utilized in the Extran Baseline conditions. 20. Please provide documentation for cross-section 18770 utilized in the HEC-2 Post -project runs. 21. Please review and modify as necessary the hydrologic status of Arthur's Ditch in the current SWMM. In reviewing the material submitted by the Sear -Brown Group for Centre Avenue, it appears their design of the irrigation canals includes stormwater — which may be different from the hydrologic assumptions in your submittal. Please coordinate with the Sear -Brown Group to ascertain the specifics on this issue, and make any necessary modifications. As always, the City appreciates the time and effort put forth to prepare a report such as this. Your dedication to quality work is greatly appreciated. If you wish to discuss the above comments, please do not hesitate to call us at 221-6700. Sincerely, ,�%n Sincerely, Vt,�Gltq'1 d. Susan Duba Hayes Marsha Hilmes Senior Stormwater Engineer, Master Planning Floodplain Administrator CC: Kathleen Byington, CSURF