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HomeMy WebLinkAboutLot Certifications - 04/16/200104/16/01 MON 14:43 FAX 970 491 9984 JR ENGINEERING IM008 April 16, 2001 To Whom It May Concern: J•R ENGINEERING A Subsidiary of Westrian The Property described as Lot 11, Huntington Hills PUD, Filing No. 4, City of Fort Collins, County of Larimer, State of Colorado (Per Client) Address: 901 Fossil Creek Parkway Drainage Certificate The attached drawing shows the elevations and drainage patterns that are the Registered Professional Engineer's certified findings of the finished ground grades for the above described property. It is hereby noted elevations at the rear property corners are lower than those shown on the approved plans. However, as a result of the review of this information by City Stormwater Staff it was determined that this condition was not significant enough to warrant additional work. The overall drainage patterns are in general conformance to the approved drainage and grading plan. The elevations as depicted hereon may change subsequent to the date of the survey due to natural and/or artificial actions. 4.3-o1 Date of Survey For and On Behalf of JR X:V I85021LOT6FLG4.DOC 2620 E= huv= Rind. Suite 190, Fort Collins. CO 80525 970491-9898 • F= 970.491-9984 • sswsvj[c�criug.cumt } 3 Y a�N 0_� W YN FLU M oaf ?Up (X N 0 JJYOO� li N J ti wi O NaZ0DCVO] Jw� O I m . 00, Z 2 o u) M N ZWW W i=�wO0�� ZOO J=a�aacc uuIpj VNldddNIVNd dr 7955 LK9 OL6 XVd 99:9T NOW T0/9T/f0 i� o u a)LL o: cw LL LL N v DWI:Z. . ui.I I.Uacv LL J� N 1 in, N N LL N o L (V co c~iv /pCti er rei= M '�v u1f) u 'b N r- f U- o h 90HRa II9HH Hf M6 T66 OL6 %Vd tt: VT NOR TO/9T/60 04/05/01 THU 13:46 FAX 970 491 9984 JR ENGINEERING IM 001 facsimile TRANSMITTAL J•R ENGINEERING A Subsidiary of Westrian TO: Mr. Jay Barber COMPANY: City of Fort Collins — Stormwater Department RE: Lot 11, Huntington Hills 4`s — Floodplain Information FAX NO. 970-221-6619 DATE: April 5, 2001 PAGES: 4, including this sheet Jay: Please find attached a copy of the grading plan for the above referenced area in Huntington Hills f Filing. As we have discussed, the area at the rear of the lot was filled, but not as much as shown on the approved grading plan. I have also attached the portion of the HEC-2 output that was included in the Preliminary Drainage Report for Huntington Hills PUD Filing No. 5, prepared by Ayres Associates, that shows the 100-yearWSEL's for this reach as shown in said report utilizing a Q-100 of 680 cfs. This report included the revised sections adjacent to Huntington Hills Filing No. 4. Subsequent to that report and the approval of Filing 4 Greg Koch at Lidstone and Anderson, was contracted by JR to revise the flows as part of JR's work completing the 0 Filing. As a result of this work, the flow was increased for this reach from 680 cfs to 1151 cfs and the HEC-2 was updated for the Filing 5 report, but only the sections adjacent to Filing 5 were considered. (It was our understanding that this number was conservative as based on the actual development and imperviousness that was in the actual basin.) As a result of all of this information, the conditions that exist on this lot and the adjacent lots are that the grading was never completed per the approved drawings. This is our first Drainage Certification for this area, so when I saw the issue I immediately notified Sanford Homes. It is my opinion that the structures are safe as they are well above thel00 year WSEL of approximately 4917.00. However, there may be some encroachment onto these lots from Stone Creek as the proposed and modeled channel was not fully constructed and the current cross -sections do not confine the flow as much as modeled, therefore probably lowering the WSEL by some amount. I'm sure that this may not be perfectly clear to you. I would be happy to meet with you to discuss this in person. If you have any questions or co ts, or Hasa aaarnunar uuUu„au.,u,- 9888. Thank you. Davi ckeman, PE Division Manager email: dklockeman(a),irengineering.com Attachment The information contained in this facsimile is confidential and intended only for the use of the individual or entity to whom this cover sheet is addressed. If the reader of this message is not the intended recipient or the employee or agent responsible to deliver it to the intended recipient, you are hereby notified that use, dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the transmitter by telephone. 04/05/01 THU 13:46 FAX 970 491 9984 JR ENGINEERING @ 002 0 = 3.17 cfs Cd. 192 cfs u• amobft I Now �•-•.-._..,_ E Pow ti ; .`........ ©SS.rL CREEK PARKWAY • •CM►F CULVERT ' '�•: .. ..mot �.�.. 0=L82cFs.... 'mods 6.73 cfs „ ...... ... �t'�''' FF 240 1.4 13 I I 1 a• ' I' I I � 4924 �FF•25.0� `FF 25.5� •1.2.� .11 .t0. .. . ..................... ..........fib .• � � • • a9zo _• •• ,....._, 4919 I , - I I �.. 'jTqNE ...... J :'.: _ 0• ° 1� .I1 . 12.5 12.2 12132...o..''....... .................' :........ ............... ............... .. :.............: 1 29 ...........I 28 I 27 I: 26 , 25 I :�24•.•••..:j�••. -----�•—--=--y-- - -----L---- •--�---- ----- ass` 1 NOTE: AREA SOLI'►4 JF LOTS 8 TO 14 / SHALL HL RLVEGETAIEC WITH NATIVE GRASS SELO AFTER E ~ i COMPLETION OF SANITARY Z W m s SEWER CONSTRUCTION W • W W Oroe 19.65 CF3 W _ Y- 1.07, :. a V = 3.23 fps .. 04/05/01 THU 13:47 FAX 970 491 9984 JR ENGINEERING IM 003 4 a \ 4 4 it it 1 aStARri t0.t0.n lets now, naCWM GUAM 10.10.44 uia SWIMM siorue ••••••• ao-3 .............. ........... I045- ASStstfs 1.1 AT Sm 01 cam-SSCT10s Nam= SmI01Y 105sas IS 50010R a/ mms Llss ns00RCs Wmmomers a 4400YQ MMTW5 IMPOl area W MI Wm TOMD la•n nJ¢I 0 SIC" 1.000 4902.90 001.E 1.1% 4.29 12.eo 1.54 4019.10 480.00 .YC 1.000 Still." 04S." 3.11 1.06 IS.0 1.01 4190.19 400.00 41.00 ).On 4401.01 0tl.11 1.54 3.01 13.45 R.S7 405.30 sOSAO SO." 1.50E 00.45 41".47 1." 1.8 103.64 17.10 4900.50 M.n It." 4.004 4101.E 003.11 4.05 1.25 134.11 44.04 4901.10 440.00 71.40 ' S.100 4001.51 4901A1 1.16 1.11 105.01 $5.74 003.10 soon 120.00 ' *.no 49n.21 4204.45 3.33 .n V4.41 $1.11 4"31.40 4.0.0E u1.00 • 1.000 4905.04 49n.15 4.46 A4 1u.14 115.13 4/04.68 e90.00 111.0E /.009 4904aP 4106.94 3.15 .41 194.91 15.0 4105.90 410.0E lit." 0.50E 4901.11 4901_11 3.43 .SI 170.10 18A4 004.1E goo." 44.00 9.400 4901.6s 4140.64 3.44 .sS 17/.54 110.01 Good." 410.00 15.0E • 9.35E 4M.45 4908.17 4.90 1.7s ns.59 141.1E 040.1E 400.40 40.n - 10.000 4990.51 4900.70 1a9 5.11 116.04 0.00 490.30 410.00 les.00 • n.On 4011.11 4913.21 9.0e tat 115AP 110.00 015.00 WAS 114.0E 11.00 4119.34 oPls.le 1.12 5.0s 54.34 62.56 4911.40 990.00 140.60 11.10E 451S.15 4914.30 S.14 2.95 0.41 50.41 4011.40 400.00 1$.n 13.3n 4114.05 4934.44 6.41 3.35 51.01 71.65 4111.1E 680.00 30.00 1 oslAos 14,10,03 SWIM2 OCI6 10 ICK mm sm 1MRs slo411 0 1Iu Ulm Md." 01/.10 5_30 1.10 11.41 91.41 4113.00 M.n SOM 11.00E 4019.14 4514.42 4.34 3.14 101.11 IMP 4914.40 606.00 111.0E • MASS 4116.44 4111.99 1.31 3.14 414.4E 0.04 4I1S.14 440.00 1E0.00 16.040 4111.0 OIS.n 9-91 1.1E 307o0 11.55 4921J0 00.00 M1.00 50.000 010.3E 010Ae 4.43 .64 1SS.50 31624 4111.50 00.00 111." • 100.000 4114.44 4935.SS 1.45 $.es 110.11 S1.11 4214.06 410.00 440.44 • 115.00E 4114.10 4424.E4 1.25 .70 344.15 111.33 4510.00 641.00 310.00 • %)O.000 010J3 4936.11 SAS 1.33 435.13 39.0 4111.00 440.00 105.00 • 140.000 4111.41 49)4.15 4.0 .91 334.10 440.10 011.00 00.n 340.00 • 150.440 4934.14 014. PI 1.13 1.14 111.5E 24/_14 4931.0 4n." 106.00 ) OSAonS 10.10.02 SWMASP or 2MRS AIR Smm wm ORIIIQ ssc o 7An 44IO 1 CRMChL Dom AS== 11IR100 fi l 1.00E 01DP)Y• a Milit51 SPICIIIC MISS 4 Zcxm fla 1.15E 1e0IliA- 1 4>a1aeAA E4PII A1W W SPCl/IC ann SAQsaaS sSOW. 1.150 Plowrl1. 1 1411131134 'INSs1S0 svca 10.408 PROM& I COLNWVA C1 OIaOCS oalEmS AocSPn.EI.E EAAaE 47AliC• SS40. 11.000 mrm. I On1 nm As1u4W CAOItOO SIM. 11.00E mon". I I)SI404 SPICIPIC llR SMAK011G sz 1 11.000 P00I11i. I SV051NCS CLUM MEZI S ARTOOIIM RAPES 40MSIS0 sa4110. 10.000 ramus• I Ca1PRAICS CRAMPS OMIDS ALQnAOY ROOM amilm I[Oq. n.na 1sc1 . I t1<MCAL elm ALSIs® avnal xzcp . n.00e PWOI)J- 1 IIIa4o4 SICInO 130 RARSIIO 15010- In.I00 141OItL5- 1 CLM11ICS CLIu o as KC2n YS0 RARSIM 1SOW 115.0» IROPII.S- I cam"fams C1I1Rn MYSI'E 1N.)R01S ANIGS IWSM svO 130.440 mwxj[ 1 /11NSCNCs CIA" O01sI05 AGCSInOL ■0105 GO1fOS sMO. 140.00E PWIILt• I CRITIM MM ASMW CAVnOE sgcpI I40. Pat 14WnL5. 1 SIII404 SPSQno 2:I13u04 4 m Js 150.000 I"=. 1 COnR1Asa 4fIWs OMIOS AGCEPIAAL SAILS 2 PAGE I1 n01 tI POP,; CA v Pe---5) 04/05/01 THU 13:47 FAX 970 491 9984 JR ENGINEERING @ 004 ute: 20JUL95 Run Time: 10:50.58 HMyersion: 6.51 Data File: STCK dv4.Ae2 Page 11 THIS RUN EXECUTED 20JUL95 10:51:00 KMfMM'�MMMf/fffM+MMf RTER SURFACE PROFILES 4.6.2; May 1991 RM�y*M•MIM���N�M3MfAfM TERISK (*) AT LEFT OF CROSS-SECTION NUMBER INDICATES MESSAGE IN SUMMARY OF ERRORS LIST RY THROUGHOUT PRINTOUT CMO CNSEL EG VCH DEPTH TOPYID 10'KS ELMIN 0 XLCH .000 4902.50 4902.94 5.34 4.20 77.00 21.65 4898.30 1151.00 0.00 ' !.000 4902.68 4903.08 5.D6 3.98 76.12 19.56 4898.70 1151.00 65.00 1.000 4902.62 4903.14 5.79 3.32 74.17 32.44 4899.30 1151.00 10.00 1.500 4903.00 4903.43 5.26 2.50 107.07 38.14 4900.50 1151.00 79.00 1.000 4903.35 4903.72 4.89 2.25 142.69 42.84 4901.10 1151.00 71.00 1.000 4903.97 4904.24 4.12 1.77 209.73 41.19 4902.20 1151.00 120.00 5.000 4904.57 4904.83 4.09 1.17 279.63 56.02 4903.40 1151.00 124.00 7.000 4905.72 4906.12 5.04 1.12 286.64 122.32 4904.60 1151.00 125.00 8.000 4907.06 4907.29 3.84 1.16 321.41 79.43 4905.90 1151.00 119.00 8.500 4907.41 4907.67 4.14 1.21 289.31 69.30 4906.20 115l.00 44.00 9.000 4908.13 4908.43 4.36 1.23 302.93 110.91 4906.90 1151.00 75.00 9.250 4908.71 4909.18 5.47 2.01 256.65 166.53 4906.70 1151.D0 40.00 0.000 4909.88 4910.OB 3.58 2.58 282.04 50.13 4907.30 1151.00 105.00 1.000 4912.27 4912.91 6.70 2.27 178.60 102.38 4910.00 1151.00 194.00 2.000 4915.98 4917.21 9.21 3.58 62.40 100.59 4912.40 1151.00 360.00 12.200 4916.96 4917.50 5.96 3.96 92.13 38.96 4913.00 1151.00 38.00 12.300 4916.98 4917.74 7.30 4.28 87.28 57.98 4912.70 1151.00 38.00 �lo:,cJ