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Home My WebLink About921516.tiff _ _ Industrial Compliance , €- === Incorporated 15955 West 5th Avenue Golden, Colorado 80401 (303)279-2636 (� • PACKER PERMEABILITY - DATA SHEET Boring No. Pk 4- Job No. .-2 - 37/(O Boring Radius (r) .4 ' - O•I(,(4,7 (ft) Engineer Vicar. Depth of Boring (d) 020 ' (ft) Date //6/c2 - ,rr - Depth to Static Water (A) N/A (ft) Flow Meter No. 3a3 6481S— Al kwt Depth to Center of Packer (B) /0.a (ft) Height of Gauge above _ Gauge Pressure IP) (psi ) Ground Surface (C) b•a-� ( (ft) Flory Data Notes • Cubic /•_.:151. • Time Gallons Feet Flow Rate 8s5�o 0 elanoo �-de .0 O / 8‘82.. to i 6)--r o i ai, 53.2-o a 3 CS-4.0 nett) 3 13406i- 0 4- 8 req. o �- S'`r,..�`` st' 4 06 819. oo 5- e / 5 ®t9 8 7.40 'S lv (50/. 2o O 8So3 ,/o . 1 85'65',70 • J. SC 108.4-o 3 • QS71 . t-0 4 8 S-7f-, tm 5— 8 S7(o.4c. riNi+,4.7 � cr wojr . Ic 8(0 os,,io 30 8( ,7a.. lo Average Q = ft3/min CALCULATIONS K a Q 1 n L : L≥10r L - d-B LH r • H • B + C + (L/2) + (P) (2.31 )-S K a 9 sink 1 L : 10r>Lr where S a B + L/2 - A 2rrLH 2r Note: If no free water is encountered, Sao 921516 • 9'11128,9 _= Industrial Compliance --- Incorporated 15955 West 5th Avenue Golden, Colorado 80401 (303)279-2636 • --- PACKER PERMEABILITY - DATA SHEET • / J1el Boring No. p4<— ( 31 ) Job No. 0? - 37/ 0 Boring Radius (r) 02 " r a /G(0,7 (ft) Engineer LLB ,...,.—, Depth of Boring (d) .- O� (ft) Date 7010/92 '0' lodt'ets. Depth to Static Water (A) - N/A (ft) Flow Mefer No?3898 , e.,(4aee Depth to Center of Packer (B) /3,C (ft) Height of Gauge above , „ Gauge Pressure fP) (psi ) Ground Surface (C) 6 •c3 = 3.a3J (ft) Flom Data Notes • Cubic Time Gallons Feet Flow Rate • /� o 3704.(,0 I 67 04.40 d s7 4• b0 3 $7c 4-.too ,( a la v'•U:7 - s 7c4 ,a - 67c�.t, 7- 0a 70 4.Csa s7 c, 3O 8-704-.40 E O . 87c4.LLo 704.Coc 3 - 3 S. 6 (, e7c4.(.o 7 8 - io A.7c lrs` . i — 7c (.J 30 2171.c.a Average Q ft3/min • CALCULATIONS K t Q In L : L?lOr Ltd-B LH I • H • B + C + (L/2) + (P)(2.31)-S K sinhl L : lOr>Lzr whereS B + L/2 - A ZirLH Zr Note: If no free water is encountered, S - 0 • • • • 9< 0389 _= Industrial Compliance € = Incorporated 15955 West 5th Avenue Golden, Colorado 80401 (303)279-2636 i n�/ PACKER PERMEABILITY - DATA SHEET Boring No. • PK r Job No. .o2- 3 7/(O Boring Radius (r) &" - O.r(,(.re7 (ft) Engin r ..rrv--- . Depth of Boring (d) 020' (ft) Date /&o� Depth to Static Water (A) nJ/A (ft) Flow Meter No. 3a3g98hs Reckwe Depth to Center of Packer (B) )3..r (ft) Height of Gauge above Gauge Pressure (P) (psi ) Ground Surface (C) 3.c .5 (ft) Flow Data Notes Lubec 1� • Time Gallons Feet Flow Rate o7C9t.lry 0)O vu o S•7c 4-,(oe+ .S 67.241.64, - S7C¢(so CIA; 0 7 ' f • 8 j 5- 870*Coo ro • . e¢GC c 3o • j ?c..Coo • -.S9s.: 0 3 7 Vern(iv z . 3 - • .r8 • a - B Jo�•c.c i-- b7cs.(iv x' 76 , vC • Average Q • ft3/min • CALCULATIONS K = � 1n L : L?lOr L t d-B LH F H • B + C + (L/2) + (P)(2.31 )-S K Q sinh 1 L : 10r>Lr where S B + L/2 - A LN 2r Note: If no free water is encountered. S - 0 • • • • pT R 9N�© mot _ lndustria/Compliance ZPo♦��ya SHEET / OF 3 JOB NO. o� - 57/(0 SP // 1746 Cole Blvd., Bldg. 21 #300 y E ' PROJECT- f Key&I£5 au E a' Golden, CO 80401 BY /J DATE i ,c0a 9z 303/277-1400 CHECKED BY DATE / /'LS /4 L t €t r G kllAte �-—G1- = c?$ `r )4, 5 fry- 10. 50 fr l- IOrr r z-A = O 1J0 fren h/Arna N= B - h- -1* P &.sa - s = 1', b + a. as r /c•sa/z t P(2,31)-0 = . 7gCr P(z,3/) 13= Q _ C) -j Y(o)J/io,so�/iav t 5 = crase� X711 r a,T( ro• v)CH5(0.467 l il, G4 I tr (0:441./i kl-rzav,41- (GQM� t (om is) (-Dmmett45 -- _ O2.7 a4q t wtes 1.8z4„, 145.10 1,7 x10 DID n.(07- (0 ro I Md) CodsiOEC (9.4 GAL] M In DATA-- k r-.7%_ C1 ro t Mi�I 5 (&1k 4_._ a SA N _ 85-64 as� cz 71) 3 "RA? -_ claw MEn_' 1.2 aaL/1 M. _ _ snt.e x_ (3r04 m/d D. aaL/1M• l�iv 1t Ml qi 5 15 a. 7 Gk.'i (00 5(a. (05 dm )4 -4 - (On 1 nv�JJ FrGALI wtt�G Li -rp z wti a� 02.7 Gaytn4\ taro 5rnIN.) a2.(Q GAL/ I Mill 13172 '1 nil&A) pr, D wok/ (LIDO 5 piiN 2./1GAt/1M l5iv!a titIrD 0. 5 eqc/mie 92033 39 (0 )7 .nAft! ezes emit Industrial Compliance z'�pyi SHEET 02 OF _3 JOB NO. el- 31/(p W SP - '..... - 1746 Cole Blvd., Bldg. 21 #300 ` 'E PROJECT V eenes um Golden, C080401 By DATE / / ZZ/ 9L 303/277-1400 CHECKi D BY DATE f /Z3/ q !, D ( 5 i LCn /fl£2ktit a A11) (F r f ) (cm& C_) mNt men i 15(cow? a,a 4,44.) I w (l iv t 4WJ (rrv9) a5&ALI I m 1a, a6,4-45xIN (10 (0/.6 All _ iI.Z GAL/541, - _ (15.ni_zo Ml _ _ _. 3l is- -- a (a-at_IIM1ki aai (Q�2 1,4 x10-4 - (0._T0 0 __a.I a4L/1Auk: __11T0L) (z 73) (3rag� a. a (41w2 a.3 (5 7V(C a'Gv7) (7 TO Zb a,4 (Troy a(4i n i o) iI.5c41.)5 (so -ry ISmkt g.7G4LI5 INI ()S 1v toI g.gaA-0541, I� 1Z0 -�,ZS) 9„ s£33 OF Industrial Compliance -IC Ay' SHEET OF .3 JOB NO. a - 817/10 sp r /, lIr 1746 Cole Blvd., Bldg. 21 #300 `STE�r' PROJECT � L kits 2.3U Golden, CO 80401 BY DATE 7Z 303,277-1400 L CHECKED BY 1- 1 DATE / IZ 3 i _— Presss5a►e A g ` a ht (p50 (aAL �cl lntika (GaMl\ T�C �rx�tl5-) Coot/nerds 6,44-// n„J a (,5 -a 75 L4x'io l (o-ro !_M/ _ __. _ _ 5,5GALl IMIJ £7 Czms 3• (3 roi0 - 2• z c >a q £3 Cs Tv _ 4 >a .73 as £lw.I) - c.‘f_ - _- a__ (F7D.9) - (977) io 11. s &A-1- ev1 (10 /54) o1.7GAi/5riIN (!5zD zal . 8, 8 C,q-L/5tit I (zo rn zs) 34,40 _ A = '1.1X1-4) +(a.o gib "145 0.4 ?cm-43r A Y/o".5 _ )I Po "461 IrKVG 9;.'0_789 'nous:had 1—— Compliance c�-�= Incorporated 15955 West 5th Avenue Golden, Colorado 80401 (303)279-2636 • - PACKER PERMEABILITY - DATA SHEET Boring No. . (O (v&.dr P? l4'� Job No. c2-37A0 Boring Radius Cr) 2" - 0. /(,4,(,7 (ft) Engineer tide,t t r' Depth of Boring (d) aS ( ft) Date )�,ti/9=-'ff �S=r--„ Depth to Static Water (A) N/A (ft) Flow Meter No. 3.1361/478n-- cAtal-P Depth to Center of Packer (8) /4„5— (ft) Height of Gauge above Gauge Pressure IP) (osi ) Ground Surface (C) x.01 S— • (ft) Flow Data Notes Cubic ricrsfE S iops:. ,ICisO4, Time Gallons Feet Flow Rate (cL4 ,„.t..) rowiCpsc.. aya_ f%.— )2 t0 04656:7 funrvwp .2*catfps,. D 2 ti4 � I 3 6901. D s -a a • AO a0 a1 i.r r�ra*• w t0%.( • rte 84(.5c (.8.z 73.7 3 --- dr8/• 8 87.o 5 ea• s .v &9 ,A.o it ',cock], ,l, 13 Average Q ft3/min CALCULATIONS K Q In L : L?lOr L d-B eirLH I • Hr B + C + (L/2) + (P) (2.31 )-S K r Q sinh'1 L : 1Or>L≥r where S I B + L/2 - A ZIrLH 2r Note: If no free water is encountered, S0 • 9 '99 Industrial s Compliance c —�= Incorporated P 15955 West 5th Avenue Golden, Colorado 80401 (303)279-2636 PACKER PERMEABILITY - DATA SHEET Boring No. .('-4— (F (Akar (Pi- 1¢0 Job No. -37J Boring Radius (r) ;2" = U./(.A,t,7 (ft) Enginee 'Pt'r''r"- Depth of Boring (d) (ft) Date l4iZ i s'-1 efs\ Depth to Static Water (A) /VA (ft) Flow Meter No. 14,436518/S- /? ...Jae Depth to Center of Packer (B) /4-.5- (ft) Height of Gauge above Gauge Pressure IP) (osi ) Ground Surface (C) o2•oTSJ (ft) Flow Data Notes Cubic • Time Gallons Feet Flow Rate S•7SLSo c4-do 2 S4.Lo 3 513' 5b ¢ (,O.7O s 87& .9o • 87 GS. 2o 8 (.7.(to (Rego 9 2.3a l0 6734.So is- 87$10.00 • .70 87y5.7o (- $pas 8804-So o 8ono 8I 3 2 88gg. a 70 S 862.5.;0 0 BBa9.ao g 3(.co . q 3q,(do 864310 ts- 8873.Co d0 8h'osgo • Average Q = ft3/min CALCULATIONS K = Q InL : L?10r L = d-B LH 17 r H = B + C + (L/2) + (P)(2.31 )-S K = Q sin1 h L : 10r>LZtr where' S = B + L/2 - A LH 2r Note: If no free water is encountered, S = 0 • • 912a • Protect KCCAks6ue____- r,,.ii Mw- i -- By 31Th1 Date t aligL Chk 'd ch� Date \ 1"T •7 IciZ. ,...tial water level (hmin) on cic r Units r= /a . 0,033 time= ce&- tfrr R= sin _ p.33 length= r-r .. .... •...\ \•.,. AI Iq 6. L= aoFr o Results m time h H/Ho To- ('d' Sec fill III :3 ei IH Hi a � _ —tallni L C7 )( = t2ln R . — t o o h 2Lt dh o"i e o ° C .. R =(I�z QH (64414) —t=0 FN., h c �a a(aoX/a)(LSf� C' m H h H0..'.r i.7 Da It Notes: 1) Isotropic •.• : I. . in m 2) L/r is >8 .4 I:•-I. o Vh : = I.3 Y 10"`'� /Dike!, • . R to 3.LY/0-`� �ISCC v V Y Datum 1.0 .. '' i— int , ri , I i i i ( 1 0.5 - - - -- - = O 0.37 •� - _ If .c r o r. I 5 ? li Otif .1 I r r 1 r r r 11 r 1 I I r r l r 1 r I r r r 1 r 1 r r lSi �•-_ �. _may ... -'- 0 .0 s r -- . -- r _ --_ _ _ I -__ -----L__=--r== f ( _ I 1— r- t t 1— 0 .01 I t , r —�— � I L _f 4 1 0 /0 020 3O `/0 50 tII Ito me 50 90 X0O �v is a 3®9 1 v Industrial ComplianceeLia SP 2� SHEET I OF o d2 JOB NO. - 37140 W SP 1 - 1746 Cole Blvd., Bldg. 21 #300 `v+el' PROJECT wn�t=+J�� EC= Golden, CO 80401 303277-1400 BY DATE 1 /071 / 91 CHECKED BY r ( DATE 1 / 21/an (I MW-{ *SLuP„ Tmsr (. u4 Ours . II WELL . D./& Z Fr co 4083 Pr tti r= 0.083 Fr VOL 134 I Lee: 3- Fr /,075 'er4 ✓., 7Tr as :5Fr X 0. /Oy c ✓- r(0,05Z 9(5i, _ jrY _ 0.05acr V/` 0. 0'3 Fr-3 , 1 1 I MA)L. EFFscr )s1 Wnw.L- - l7:-l7:- li ro 2.X �7 - L 0,043r4 = Tr(0, 013Z�X s - . .. 1= II Hyrax = .P4.4Z +/,4(0 = 3/, 38'lr _`h , - E -- - M p = c'19,'i2 t- TME ( -P --L. aAmax - - yL i o_ aq. z /44,, l_ - li 10 _ a0_ 30,i.io _ 0,48 o.a- - +It 30- 50.30 D,68 _. 0,46 ---- - �i7 3D.zs - 0.83 D. 4a _ _- -- j;-m 5D_ 30.z5 0,83 0, �ZE _1_ II I / 490 30,10 abg a.3.6- L _ 75 30.05 0.03 0.32 - 90 30,05 04_3 0.32. (0. _90.025 0.4 0.31 OD 0..OZa 0.G1 0.3! 130 .:0.0 0,5f 0,30 ! 140 30.D 0.65 0.30 'I 1105 30.0 0.5$' 0,3(0. ! i )?so af.915 o.5-4 0.aq I i _' l_ qm;✓i a9.96 0.5-3 c.a7 . 5nu X9.9;S o.S I 04o10 h,;4 a9,97E 0.171 o, 3 Irm%n a41.8a 0- 'l3 o.aa. &0rrn 49,10 0,38' 0,4 a6 m,n o94. 774 0, 30 Dig 30min a9.lit 0.3/ 0,IS 9: Q. r89 `QpN4lF Industrial Compliance Ea-A SHEET o7 OF JOB NO. c9-3 7/4' W SP r' 1746 Cole Blvd., Bldg. 21 #300 y 'E PROJECT .fE./�/�.S EM 2:7 Golden, CO 80401 BY Cl DATE I k:90, 9a 303/277-1400 a ' CHECKED BY .Q. L DATE / 7Z/ 'IZ MW-I &w ell 0,39 - . T= la X see- &sr r)-r- 1.4E. o J Ge-A-PSI - = . (,Soea, K r Zen (h L w l-(f,f:fi: r^ _ 1 ' a � T R = `� " z aolian = ao x a (ao)Ua)(Lye) x!Q -4 to/sec_ a5'4 r.rH _azio 4 cel c. 920; 89 P:ojecet r-�i,C- A.1y.-3� ti{s, n well r MW- � /.By E'ei lu Date 1lr9'/Q2 Chk 'd l/ Bate ‘ hl- \ 1Z I. _ial water level (hmin) = at • ja Units II r- _j___— time= 5CC- -II-r R. 4'n length= rt- .\\\'''ç ' ..... ... Il Ir L. 1DFf oResults III II O time h H/Ho To= 7() ryji/1 —t=c0 (and t<C U A III If n Z 2 (L\ — ftdt w U Kh= r in R •--f — t 'o Q 2LT o dh tr ail $ —t- # K = i z 6.V•• \ — 'v h o �d .0O0x/Q)(7D�tbD) V m H h Ho'I..' i7 -c Notes: 1) Isotropic L 4a m 2) L/r is > 8 .4 is m CI U in '.I-:I•'�R er— Y Datum _ `6.G y/D'` e' cam • 1.0 .. --r----'r r i rrr r 0.5 0.37 t = — ' Z t O J r3 tPo ®® 0 .l _ r r i 0 .0 s _ . 1 I I 1 i ` 1 ' --' ii i I 1 I I D /0 ,P0 t'ffie `/o a-0 1,0 920089 APPENDIX H WATER QUALITY RESULTS 9::; 0389 Laboratories, ba Environmental Monitoringaboratorias, lnr,. 2100 Cleanwater Drivenan ent A Waste Management Company Geneva. Illinois 60134 9 708l2Ccv10C Enclosed are the analytical results for samples received from your facility. The results in the Client Report are for a single ENS (Event Notification System) number only. The sampling event at your facility may include multiple ENS numbers . A separate Client Report will be generated for each one . It is the goal of WMI Environmental Monitoring Laboratories, Inc. to provide analytical data in a timely fashion, formatted in a way that our clients will find most useful . If you have any questions concerning the form or content of this report, please contact the WMI EML Customer Operations Department : Main Number ( 708 ) 208-3100 FAX Number (708) 208-1175 Note : Two designations may appear in the results column of your Client Report: NA or ND. The designation NA (for "Not Analyzed" ) is used to identify analytes which were requested in the monitoring program, but for which no suitable testing methodology exists . NA may also indicate a dry well, broken sample bottle, insufficient sample volume, or other condition which precludes analysis for a sample. The designation ND (for "Not Detected" ) is used to indicate that the analyte of interest was not found at or above the concentration listed under the EMLRL (EML Reporting Limit) heading. Unless otherwise indicated, all analytes meet the requirements of holding time as specified in the method. Bruce Warden Fra k Jark Assistant Director Manager Laboratory Operations Quality . grams 320383 As an additional service , the EML is introducing the DATA QUALIFIER REPORT. This report documents important additional analytical information. As defined in the EPA Contract Laboratory Program ( CLP) and numerous state regulatory programs, applicable data qualifiers (annotations or flags ) should be included with data reports to facilitate the appropriate interpretation and use of the data. These annotations will document to the client information such as dilution factors and matrix interferences that occurred during the analysis of a sample . The DATA QUALIFIER REPORT produced for each affected Event Notification System ( ENS ) number is divided into five sections : 1 ) Sample No.- The affected EML sample numbers under the given ENS number are listed here . Refer to the Client Report for the EML sample number which has been assigned for a given sample point . 2 ) Method ID - The EML method code that the sample was analyzed by is listed here . 3 ) Analyte - The analyte being affected by the qualifier is listed here . If the method contains multiple analytes that were affected, the phrase "Every analyte for this method" will appear. 4 ) Code - Two letter abbreviations for applicable data qualifiers appear in this column. Please consult the accompanying key for a brief description. Additional information may be obtained by contacting your Account. Representative . 5 ) Dilution Factor - This number is the factor by which your sample had to be diluted to bring the result into the working linear range of the instrument or to minimize an interferent . Examples : Sample No. Method ID. Analyte Code DF AB2345-L3 VOMSAAA301 2—Chloroethyl Vinyl Ether ST -- AB2345-L3 VOMSAAA301 Every analyte for this method DL 10 9`M983 The comments that may accompany the data are as follows : DL Sample diluted. Reporting limits have been adjusted when necessary. (This qualifier is the one that appears most frequently. This qualifier means that the sample was diluted to bring it within linear range of the instrument or to minimize an interferent. HS Headspace in the sample bottle exceeded allowable volume . II Isomeric identification is tentative due to co—elution of a compound with similar mass spectra . (The above qualifier indicates compounds that have tentative identification due to co—elution or lower quality matches with the spectral library. Results with these qualifiers are not quantitative. ) MI Recovery failed criteria for this compound: Quality Control Standard showed analytical system was in control . Result indicates a severe matrix interference , which could not be corrected for , and the results are semi—quantitative . MX This sample was used for matrix spike ; recovery failed criteria for this compound; Quality Control Standard showed analytical system was in control . Therefore , matrix interference is suspected and this may affect the result . RA Acid Surrogate recovery failed quality control criteria . Matrix interference is suspected. RB Base/Neutral Surrogate recovery failed quality control criteria. Matrix interference is suspected. (The above four qualifiers (MI , MX, RA, RB) are qualifiers used to show matrix interference which occurred during analysis and may affect the results. The matrix spike being out of normal range is the primary indicator of this type of interference . Accompanying quality control standards in range indicate that matrix interference (not an out-of-control situation) existed during the analysis . Efforts are made to eliminate matrix interference where possible. If the matrix interference is eliminated, no qualifier is noted. Both MI and MX are reported as per EPA methodology. ) NQ No standard qualifier code is in use for this qualification. See associated comment. PX This sample was not in the acceptable pH range at the time of analysis . SB Analysis of this sample was performed by an approved subcontract laboratory. SU Analysis failed surrogate criteria . BL Method Blank concentration for this parameter is greater than the maximum allowable concentration. (The above two qualifiers (SU,BL) denote failed quality criteria for the method blank and surrogate recovery. Where appropriate, analyses that have failed these criteria are repeated. ) TX Analysis was conducted after the holding time expired. ST This compound is not stable in acidic water . B Broken bottle D Dry well I Insufficient volume to perform test 10/15/90 9. 0:.: 89 Page: 1 1 NMI ENVIRONMENTAL MONITORING LABORATORIES, INC. IheJ CLIENT REPORT Si 464 - East Weld Landfill Sample Point: GWMW01 ENS: 91-12476 Sampled: 9-DEC-1991 Proposed Disposal Facilit Sample Type: . WELL MP: 464911 Received: 10-DEC-1991 Weld County CO 00000-0000 Sample Number: AE0981 REV: 00 Reported: 14-JAN-1992 Analyte Result EML RL Units Method FIELD DATA: ACTUAL VOLUME PURGED 12.5 GALLONS FDWPURINFO DEPTH TO WATER FROM TOP OF CASING 29.34 FT FDWDTWTC01 ELAPSED HOURS .6 HRS FDWPURINFO PH FIELD 7.01 PH UNITS FDPHQUADO1 PH FIELD - 7.01 PH UNITS FDPHQUADO1 PH FIELD 7.00 PH UNITS FDPHQUADO1 PH FIELD 6.99 PH UNITS FDPHQUADO1 PURGE DATE (YY/MM/DD) 91-12-09 YY/MM/DD FDWPURINFO PURGING DEVICE G FDWPURSAMP PURGING EQUIPMENT DEDICATED Y FDWPURSAMP PURGING MATERIAL D FDWPURSAMP SAMPLING DEVICE G FDWPURSAMP SAMPLING EQUIPMENT DEDICATED Y FDWPURSAMP SAMPLING MATERIAL D FDWPURSAMP SPECIFIC CONDUCTANCE FIELD 9110. UMHOS/CM FDSPCONDO4 SPECIFIC CONDUCTANCE FIELD 9150. UMHOS/CM FDSPCOND04 SPECIFIC CONDUCTANCE FIELD 9120. UMHOS/CM FDSPCOND04 SPECIFIC CONDUCTANCE FIELD 9140. UMHOS/CM FDSPCOND04 TUBING-PURGING C FDWPURSAMP TUBING-SAMPLING C/NYLON FDWPURSAMP WATER TEMPERATURE IN DEGREES CELSIUS 10.7 DEGREES C FDXTEMPC01 CHEMICAL METHODS & ROBOTICS: ALKALINITY,BICARBONATE 521 10.000 MG/L CRALKBIC01 ALKALINITY,CARBONATE ND 10.000 MG/L CRALKC0301 NITROGEN, AMMONIA ND 0.020 MG/L CRN2NH3X01 TOTAL ORGANIC CARBON 6.0 1.000 MG/L CRTOCDUP01 TOTAL ORGANIC CARBON 5.8 1.000 MG/L CRTOCDUP01 TOTAL ORGANIC HALOGEN 10 5.000 UG/L CRTOXDUP01 TOTAL ORGANIC HALOGEN 11 5.000 UG/L CRTOXDUP01 INORGANICS: ARSENIC-DISSOLVED ND 70.000 UG/L DL INGFAADIAS ARSENIC-TOTAL ND 70.000 UG/L DL INGFAATOAS BARIUM-DISSOLVED ND 200.000 UG/L INICPDISCA BARIUM-TOTAL ND 200.000 UG/L INICPTOTBA CADMIUM-DISSOLVED ND 5.000 UG/L INICPDISCD CADMIUM-TOTAL ND 5.000 UG/L INICPTOTCD CALCIUM-DISSOLVED 178000 5000.000 UG/L INICPDISCA CALCIUM-TOTAL 461000 5000.000 UG/L INICPTOTCA CHLORIDE 263.5 10.000 MG/L DL INICXXCLXX CHROMIUM-DISSOLVED ND 10.000 UG/L INICPDISCR CHROMIUM-TOTAL ND 10.000 UG/L INICPTOTCR IRON-DISSOLVED ND 100.000 UG/L INICPDISFE IRON-TOTAL 7050 100.000 UG/L INICPTOTFE LEAD-DISSOLVED ND 25.000 UG/L DL INGFAADIPB LEAD-TOTAL ND 25.000 UG/L DL INGFAATOPB MAGNESIUM-DISSOLVED 125000 5000.000 UG/L INICPDISMG MAGNESIUM-TOTAL 276000 5000.000 UG/L INICPTOTMG MANGANESE-DISSOLVED 260 15.000 UG/L INICPDISMN MANGANESE-TOTAL 518 15.000 UG/L INICPTOTMN MERCURY-DISSOLVED ND 0.200 UG/L INCVAADIHG MERCURY-TOTAL ND 0.200 UG/L INCVAATIHG NITROGEN-NITRATE - ND 1.000 MG/L INICXXNO3X POTASSIUM-DISSOLVED 22300 5000.000 UG/L INFAADISXK POTASSIUM-TOTAL 24000 5000.000 UG/L INFAATOTXK SELENIUM-DISSOLVED ND 50.000 UG/L DL INGFAADISE SELENIUM-TOTAL ND 50.000 UG/L DL INGFAATOSE SILVER-DISSOLVED ND 25.000 UG/L INICPDISAG SILVER-TOTAL ND 25.000 UG/L INICPTOTAG SODIUM-DISSOLVED 1750000 40000.000 UG/L DL INICPDISNA SODIUM-TOTAL 1860000 5000.000 UG/L INICPTOTNA SULFATE 5157.2 65.000 MG/L DL INICXXSO4X NA = Not Analyzed ND = Not Detected TBK = Trip Blank 3y;0,1- 83 II Page: 2 NMI ENVIRONMENTAL MONITORING LABORATORIES, INC. ‘e CLIENT REPORT Sit '.64 - East Weld Landfill Sample Point: GWMW01 ENS: 91-12476 Sampled: 9-DEC-1991 .roposed Disposal Facilit Sample Type: WELL MP: 464911 Received: 10-DEC-1991 Weld County CO 00000-0000 Sample Number: AE0981 REV: 00 Reported: 14-JAN-1992 Analyte Result EML RL Units Method SUB-CONTRACT DATA: GROSS ALPHA RADIATION ND 0.000 PCI/L +/- SBGABPADO1 GROSS BETA RADIATION ND 0.000 PCI/L +/- SBGABRADOI RADIUM 226 ND 0.000 PCI/L +/- SBRADIUM01 RADIUM 228 ND 0.000 PCI/L +/- SBRADIUM01 SEMI-VOLATILE ORGANICS: 2,4-DICHLOROPHENOXYACETIC ACID ND 1.000 UG/L SVGC2HRB01 2-(2, 4,5-TRICHLOROPHENOXY)PROPIONIC ACID ND 1.000 UG/L SVGC2HRB01 ENDRIN ND 0.100 UG/L -SVGC1OCP01 LINDANE (GAMMA-BHC) ND 0.050 UG/L SVGCIOCP01 METHOXYCHLOR ND 0.500 UG/L SVGC10CP01 TOXAPHENE ND 1.000 UG/L SVGC10CP01 VOLATILE ORGANICS: 1,1,1-TRICHLOROETHANE ND 5.000 UG/L VOMSAAN301 1,1,2,2-TETRACHLOROETHANE ND 5.000 UG/L VOMSAAN301 1,1,2-TRICHLOROETHANE ND 5.000 UG/L VOMSAAN301 1,1-DICHLOROETHANE ND 5.000 UG/L VOMSAAN301 1,1-DICHLOROETHENE ND 5.000 UG/L VOMSAAN301 1,2-DICHLOROBENZENE ND 10.000 UG/L VOMSAAN301 1,2-DICHLOROETHANE ND 5.000 UG/L VOMSAAN301 1,2-DICHLOROPROPANE ND 5.000 UG/L VOMSAAN301 1,3-DICHLOROBENZENE ND 10.000 UG/L VOMSAAN301 1,4-DICHLOROBENZENE ND 10.000 UG/L VOMSAAN301 2-CHLOROETHYLVINYL ETHER ND 20.000 UG/L VOMSAAN301 BENZENE ND 5.000 UG/L VOMSAAN301 BROMODICHLOROMETHANE ND 5.000 UG/L VOMSAAN301 BROMOFORM ND 5.000 UG/L VOMSAAN301 BROMOMETHANE ND 10.000 UG/L VOMSAAN301 CARBON TETRACHLORIDE ND 5.000 UG/L VOMSAAN301 CHLOROBENZENE ND 5.000 UG/L VOMSAAN301 CHLOROETHANE ND 10.000 UG/L VOMSAAN301 CHLOROFORM ND 5.000 UG/L VOMSAAN301 CHLOROMETHANE ND 10.000 UG/L VOMSAAN301 CIS-1,3-DICHLOROPROPENE ND 5.000 UG/L VOMSAAN301 DIBROMOCHLOROMETHANE ND 5.000 UG/L VOMSAAN301 ETHYLBENZENE ND 5.000 UG/L VOMSAAN301 METHYLENE CHLORIDE ND 5.000 UG/L VOMSAAN301 TETRACHLOROETHENE ND 5.000 UG/L VOMSAAN301 TOLUENE ND 5.000 UG/L VOMSAAN301 TRANS-1,2-DICHLOROETHENE ND 10.000 UG/L -VOMSAAN301 TRANS-1,3-DICHLOROPROPENE ND 5.000 UG/L -VOMSAAN301 TRICHLOROETHENE ND 5.000 UG/L VOMSAAN301 TRICHLOROFLUOROMETHANE ND 10.000 UG/L VOMSAAN301 VINYL CHLORIDE ND 10.000 UG/L VOMSAAN301 NA - Not Analyzed ND - Not Detected TBK - Trip Blank / Page: 3 NMI ENVIRONMENTAL MONITORING LABORATORIES, INC. le/ CLIENT REPORT Sit 164 - East Weld Landfill Sample Point: GWMW02 ENS: 91-12476 Sampled: 9-DEC-1991 froposed Disposal Facilit Sample Type: WELL MP: 464911 Received: 10-DEC-1991 Weld County CO 00000-0000 Sample Number: AE0980 REV: 00 Reported: 14-JAN-1992 Analyte Result EML RL Units Method FIELD DATA: ACTUAL VOLUME PURGED 8.5 GALLONS FDWPURINFO DEPTH TO WATER FROM TOP OF CASING 33.42 FT FDWDTWTC01 ELAPSED HOURS .5 HRS FDWPURINFO PH FIELD 7.14 PH UNITS FDPHQUADO1 PH FIELD - 7.14 PH UNITS FDPHQUADO1 PH FIELD 7.14 PH UNITS FDPHQUADO1 PH FIELD 7.10 PH UNITS FDPHQUADO1 PURGE DATE (YY/MM/DD) 91-12-09 YY/MM/DD FDWPURINFO PURGING DEVICE G FDWPURSAMP PURGING EQUIPMENT DEDICATED Y FDWPURSAMP PURGING MATERIAL D FDWPURSAMP SAMPLING DEVICE G FDWPURSAMP SAMPLING EQUIPMENT DEDICATED Y FDWPURSAMP SAMPLING MATERIAL D FDWPURSAMP SPECIFIC CONDUCTANCE FIELD 8600. UMHOS/CM FDSPCONDO4 SPECIFIC CONDUCTANCE FIELD 8570. UMHOS/CM FDSPCONDO4 SPECIFIC CONDUCTANCE FIELD 8560. UMHOS/CM FDSPCONDO4 SPECIFIC CONDUCTANCE FIELD 8590. UMHOS/CM FDSPCONDO4 TUBING-PURGING C FDWPURSAMP TUBING-SAMPLING C/NYLON FDWPURSAMP WATER TEMPERATURE IN DEGREES CELSIUS 12.2 DEGREES C FDXTEMPC01 CHEMICAL METHODS i ROBOTICS: ALKALINITY,BICARBONATE 352 10.000 MG/L CRALKBICO1 ALKALINITY,CARBONATE ND 10.000 MG/L CRALKC0301 NITROGEN, AMMONIA 0.027 0.020 MG/L CRN2NH3X01 TOTAL ORGANIC CARBON 6.0 1.000 MG/L CRTOCDUP01 TOTAL ORGANIC CARBON 5.5 1.000 MG/L CRTOCDUPO1 TOTAL ORGANIC HALOGEN 12 5.000 UG/L CRTOXDUPO1 TOTAL ORGANIC HALOGEN ND 5.000 UG/L CRTOXDUP01 INORGANICS: ARSENIC-DISSOLVED ND 70.000 UG/L DL INGFAADIAS ARSENIC-TOTAL ND 70.000 UG/L DL INGFAATOAS BARIUM-DISSOLVED ND 200.000 UG/L INICPDISBA BARIUM-TOTAL 236 200.000 UG/L INICPTOTBA CADMIUM-DISSOLVED ND 5.000 UG/L INICPDISCD CADMIUM-TOTAL ND 5.000 UG/L INICPTOTCD CALCIUM-DISSOLVED 306000 5000.000 UG/L INICPDISCA CALCIUM-TOTAL 450000 5000.000 UG/L INICPTOTCA CHLORIDE 450.0 10.000 MG/L DL INICXXCLXX CHROMIUM-DISSOLVED ND 10.000 UG/L INICPDISCR CHROMIUM-TOTAL 17.5 10.000 UG/L INICPTOTCR IRON-DISSOLVED ND 100.000 UG/L INICPDISFE IRON-TOTAL 26100 100.000 UG/L INICPTOTFE LEAD-DISSOLVED ND 25.000 UG/L DL INGFAADIPB LEAD-TOTAL ND 50.000 UG/L DL INGFAATOPB MAGNESIUM-DISSOLVED 158000 5000.000 UG/L INICPDISMG MAGNESIUM-TOTAL 238000 14500.000 UG/L DL INICPTOTMG MANGANESE-DISSOLVED 170 15.000 UG/L INICPDISMN MANGANESE-TOTAL 525 15.000 UG/L INICPTOTMN MERCURY-DISSOLVED ND 0.200 UG/L INCVAADIHG MERCURY-TOTAL ND 0.200 UG/L INCVAATOHG NITROGEN-NITRATE 10.6 1.000 MG/L INICXXN03X POTASSIUM-DISSOLVED 17500 5000.000 UG/L INFAADISXK POTASSIUM-TOTAL 17900 5000.000 UG/L INFAATOTXK SELENIUM-DISSOLVED ND 50.000 UG/L DL INGFAADISE SELENIUM-TOTAL ND 50.000 UG/L DL INGFAATOSE SILVER-DISSOLVED ND 25.000 UG/L INICPD:SAG SILVER-TOTAL ND 25.000 UG/L INICPTOTAG SODIUM-DISSOLVED 1580000 40000.000 UG/L DL INICPDISNA SODIUM-TOTAL 1660000 5000.000 UG/L INICPTOTBA SULFATE 4236.2 65.000 MG/L DL INICXXS04X NA - Not Analyzed ND - Not Detected -TBK - Trip Blank 92;0389 Page: 4 1e 1 LdNI ENVIRONMENTAL MONITORING LABORATORIES, INC. CLIENT REPORT Sit 1 64 - East Weld Landfill Sample Point: GWMWO2 ENS: 91-12476 Sampled: 9-DEC-1991 ?reposed Disposal Facilit Sample Type: WELL MP: 464911 Received: 10-DEC-1991 Weld County CO 00000-0000 Sample Number: AE0980 REV: 00 Reported: 14-JAN-1992 Analyte Result EML RL Units Method SOB-CONTRACT DATA: GROSS ALPHA RADIATION ND 0.000 PCI/L +/- SBGABRADO1 GROSS BETA RADIATION ND 0.000 PCI/L +/- SBGABPADO1 RADIUM 226 ND 0.000 PCI/L +/- SBRADIUM01 RADIUM 228 ND 0.000 PCI/L +/- SBRADIUMO1 SEMI-VOLATILE ORGANICS: 2,4-DICHLOROPHENOXYACETIC ACID ND 1.000 UG/L SVGC2HRB01 2-(2,4,5-TRICHLOROPHENOXY)PROPIONIC ACID ND 1.000 UG/L SVGC2HRB01 ENDRIN ND 0.100 UG/L SVGC10CP01 LINDANE (GAMMA-BHC) ND 0.050 UG/L SVGC10CP01 METHOXYCHLOR ND 0.500 UG/L SVGC1OCP01 TOXAPHENE ND 1.000 UG/L -SVGC1OCP01 VOLATILE ORGANICS: 1,1,1-TRICHLOROETHANE ND 5.000 UG/L VOMSAAN301 1, 1,2,2-TETRACHLOROETHANE ND 5.000 UG/L VOMSAAN301 1,1,2-TRICHLOROETHANE ND 5.000 UG/L VOMSAAN301 1,1-DICHLOROETHANE ND 5.000 UG/L VOMSAAN301 1,1-DICHLOROETHENE ND 5.000 UG/L VOMSAAN301 1,2-DICHLOROBENZENE ND 10.000 UG/L VOMSAAN301 1,2-DICHLOROETHANE ND 5.000 UG/L VOMSAAN301 1,2-DICHLOROPROPANE ND 5.000 UG/L VOMSAAN301 1,3-DICHLOROBENZENE ND 10.000 UG/L VOMSAAN301 1,4-DICHLOROBENZENE ND 10.000 UG/L VOMSAAN301 2-CHLOROETHYLVINYL ETHER ND 20.000 UG/L VOMSAAN301 BENZENE ND 5.000 UG/L VOMSAAN301 BROMODICHLOROMETHANE ND 5.000 UG/L VOMSAAN301 BROMOFORM ND 5.000 UG/L VOMSAAN301 BROMOMETHANE ND 10.000 UG/L VOMSAAN301 CARBON TETRACHLORIDE ND 5.000 UG/L VOMSAAN301 CHLOROBENZENE ND 5.000 UG/L VOMSAAN301 CHLOROETHANE ND 10.000 UG/L VOMSAAN301 CHLOROFORM ND 5.000 UG/L VOMSAAN301 CHLOROMETHANE ND 10.000 UG/L VOMSAAN301 CIS-1,3-DICHLOROPROPENE ND 5.000 UG/L VOMSAAN301 DIBROMOCHLOROMETHANE ND 5.000 UG/L VOMSAAN301 ETHYLBENZENE ND 5.000 UG/L VOMSAAN301 METHYLENE CHLORIDE ND 5.000 UG/L VOMSAAN301 TETRACHLOROETHENE ND 5.000 UG/L VOMSAAN301 TOLUENE ND 5.000 UG/L VOMSAAN301 TRANS-1,2-DICHLOROETHENE ND 10.000 UG/L VOMSAAN301 TRANS-1,3-DICHLOROPROPENE ND 5.000 UG/L VOMSAAN301 TRICHLOROETHENE ND 5.000 UG/L VOMSAAN301 TRICHLOROFLUOROMETHANE ND 10.000 UG/L VOMSAAN301 VINYL CHLORIDE ND 10.000 UG/L VOMSAAN301 NA a Not Analyzed ND - Not Detected TEE = Trip Blank Page: 5 NMI ENVIRONMENTAL MONITORING LABORATORIES, INC. ‘e CLIENT REPORT Sit 64 - East Weld Landfill Sample Point: GWMWO3 ENS: 91-12476 Sampled: 9-DEC-1991 droposed Disposal Facilit Sample Type: WELL MP: 464911 Received: 10-DEC-1991 Weld County CO 00000-0000 Sample Number: AE0979 REV: 00 Reported: 14-JAN-1992 Analyte Result EML RI Units Method FIELD DATA: ACTUAL VOLUME PURGED 7.0 GALLONS FDWPURINFO DEPTH TO WATER FROM TOP OF CASING 44.45 FT FDWDTWTCO1 ELAPSED HOURS .5 HRS FDWPURINFO PH FIELD 7.14 PH UNITS FDPHQUADO1 PH FIELD 7.14 PH UNITS FDPHQUADO1 PH FIELD 7.14 PH UNITS FDPHQUADO1 PH FIELD 7.14 PH UNITS FDPHQUADO1 PURGE DATE (YY/MM/DD) 91-12-09 YY/MM/DD FDWPURINFO PURGING DEVICE G FDWPURSAMP PURGING EQUIPMENT DEDICATED Y FDWPURSAMP PURGING MATERIAL D FDWPURSAMP SAMPLING DEVICE G FDWPURSAMP SAMPLING EQUIPMENT DEDICATED Y FDWPURSAMP SAMPLING MATERIAL D FDWPURSAMP SPECIFIC CONDUCTANCE FIELD 4270. UMHOS/CM FDSPCONDO4 SPECIFIC CONDUCTANCE FIELD 4250. UMHOS/CM FDSPCONDO4 SPECIFIC CONDUCTANCE FIELD 4250. UMHOS/CM FDSPCCNDO4 SPECIFIC CONDUCTANCE FIELD 4220. UMHOS/CM FDSPCCNDO4 TUBING-PURGING C FDWPURSAMP TUBING-SAMPLING C/NYLON FDWPURSAMP WATER TEMPERATURE IN DEGREES CELSIUS 12.1 DEGREES C -FDXTEMPC01 CHEMICAL METHODS i ROBOTICS: ALKALINITY,BICARBONATE 293 10.000 MG/L CRALKBICO1 ALKALINITY,CARBONATE ND 10.000 MG/L CRALKC0301 NITROGEN, AMMONIA 0.023 0.020 MG/L CRN2NH3X01 TOTAL ORGANIC CARBON 5.0 1.000 MG/L CRTOCDUPO1 TOTAL ORGANIC CARBON 4.8 1.000 MG/L CRTOCDUPO1 TOTAL ORGANIC HALOGEN ND 5.000 UG/L CRTOXDUPO1 TOTAL ORGANIC HALOGEN ND 5.000 UG/L CRTOXDUP01 INORGANICS: ARSENIC-DISSOLVED ND 35.000 UG/L DL INGFAADIAS ARSENIC-TOTAL ND 10.000 UG/L INGFAATOAS BARIUM-DISSOLVED ND 200.000 UG/L INICPDISBA BARIUM-TOTAL 331 200.000 UG/L INICPTOTBA CADMIUM-DISSOLVED ND 5.000 UG/L INICPDISCD CADMIUM-TOTAL ND 5.000 UG/L INICPTOTCD CALCIUM-DISSOLVED 574000 5000.000 UG/L INICPDISCA CALCIUM-TOTAL 518000 5000.000 UG/L INICPTOTCA CHLORIDE 13.6 2.000 MG/L DL INICXXCLXX CHROMIUM-DISSOLVED ND 10.000 UG/L INICPDISCR CHROMIUM-TOTAL 17.7 10.000 UG/L INICPTOTCR IRON-DISSOLVED ND 100.000 UG/L INICPDISFE IRON-TOTAL 31700 100.000 UG/L INICPTOTFE LEAD-DISSOLVED ND 25.000 UG/L DL INGFAADIPB LEAD-TOTAL 44.0 25.000 UG/L DL INGFAATOPB MAGNESIUM-DISSOLVED 115000 5000.000 UG/L INICPDISMG MAGNESIUM-TOTAL 138000 5000.000 UG/L INICPTOTMG MANGANESE-DISSOLVED 42.7 15.000 UG/L INICPDISMN MANGANESE-TOTAL 10000 15.000 UG/L INICPTOTMN MERCURY-DISSOLVED ND 0.200 UG/L INCVAADIHG MERCURY-TOTAL ND 0.200 UG/L INCVAATOHG NITROGEN-NITRATE 15.8 1.000 MG/L INICXXN03X POTASSIUM-DISSOLVED 18800 5000.000 UG/L INFAADISXK POTASSIUM-TOTAL 23700 5000.000 UG/L INFAATOTXK SELENIUM-DISSOLVED ND 50.000 UG/L DL INGFAADISE SELENIUM-TOTAL ND 50.000 UG/L DL INGFAATOSE SILVER-DISSOLVED ND 25.000 UG/L INICPDISAG SILVER-TOTAL ND 25.000 UG/L INICPTOTAG SODIUM-DISSOLVED 436000 5000.000 UG/L INICPDISNA SODIUM-TOTAL 473000 5000.000 UG/L INICPTOTNA SULFATE 2677.6 65.000 MG/L pL INICXXSO4X NA - Not Analyzed ND = Not Detected TBK - Trip Blank 3.1,0:39 Page: 6 ■ NMI ENVIRONMENTAL MONITORING LABORATORIES, INC. `e CLIENT REPORT Sit 64 - East Weld Landfill Sample Point: GWMWO3 ENS: 91-12476 Sampled: 9-DEC-1991 roposed Disposal Facilit Sample Type: WELL MP: 464911 Received: 10-DEC-1991 Weld County CO 00000-0000 Sample Number: AE0979 REV: 00 Reported: 14-JAN-1992 Analyte Result EML RL Units Method SUB-CONTRACT DATA: GROSS ALPHA RADIATION ND 0.000 PCI/L +/- SBGABRADO1 GROSS BETA RADIATION ND 0.000 PCI/L +/- SBGABRADO1 . RADIUM 226 ND 0.000 PCI/L +/- SBRADIUMO1 RADIUM 228 ND 0.000 PCI/L +/- SBRADIUM01 SEMI-VOLATILE ORGANICS: 2,4-DICHLOROPHENOXYACETIC ACID ND 1.000 UG/L SVGC2HRB01 2-(2, 4,5-TRICHLOROPHENOXY)PROPIONIC ACID ND 1.000 UG/L SVGC2HRB01 ENDRIN ND 0.100 UG/L SVGC10CP01 LINDANE (GA[MMA-BHC) ND 0.050 UG/L SVGC10CP01 METHOXYCHLOR ND 0.500 UG/L SVGC10CP01 TOXAPHENE ND 1.000 UG/L SVGC10CP01 VOLATILE ORGANICS: 1,1,1-TRICHLOROETHANE ND 5.000 UG/L VOMSAAN301 1,1,2,2-TETRACHLOROETHANE ND 5.000 UG/L VOMSAAN301 1,1,2-TRICHLOROETHANE ND 5.000 UG/L VOMSAAN301 1,1-DICHLOROETHANE ND 5.000 UG/L VOMSAAN301 1,1-DICHLOROETHANE ND 5.000 UG/L VOMSAAN301 1,2-DICHLOROBENZENE ND 10.000 UG/L VOMSAAN301 1,2-DICHLOROETHANE ND 5.000 UG/L VOMSAAN301 1,2-DICHLOROPROPANE ND 5.000 UG/L VOMSAAN301 1,3-DICHLOROBENZENE ND 10.000 UG/L VOMSAAN301 1,4-DICHLOROBENZENE ND 10.000 UG/L VOMSAAN301 2-CHLOROETHYLVINYL ETHER ND 20.000 UG/L VOMSAAN301 BENZENE ND 5.000 UG/L VOMSAAN301 BROMODICHLOROMETHANE ND 5.000 UG/L VOMSAAN301 BROMOFORM ND 5.000 UG/L VOMSAAN301 BROMOMETHANE ND 10.000 UG/L VOMSAAN301 CARBON TETRACHLORIDE ND 5.000 UG/L VOMSAAN301 CHLOROBENZENE ND 5.000 UG/L VOMSAAN301 CHLOROETHANE ND 10.000 UG/L VOMSAAN301 CHLOROFORM ND 5.000 UG/L VOMSAAN301 CHLOROMETHANE ND 10.000 UG/L VOMSAAN301 CIS-1,3-DICHLOROPROPENE ND 5.000 UG/L VOMSAAN301 DIBROMOCHLOROMETHANE ND 5.000 UG/L VOMSAAN301 ETHYLBENZENE ND 5.000 UG/L VOMSAAN301 METHYLENE CHLORIDE ND 5.000 UG/L VOMSAAN301 TETRACHLOROETHENE ND 5.000 UG/L VOMSAAN301 TOLUENE ND 5.000 UG/L VOMSAAN301 TRANS-1,2-DICHLOROETHENE ND 10.000 UG/L VOMSAAN301 TRANS-1,3-DICHLOROPROPENE ND 5.000 UG/L VOMSAAN301 TRICHLOROETHENE ND 5.000 UG/L VOMSAAN301 TRICHLOROFLUOROMETHANE ND 10.000 UG/L VOMSAAN301 VINYL CHLORIDE ND 10.000 UG/L VOMSAAN301 NA - Not Analyzed ND - Not Detected TBE - Trip Blank 9.?,0 389 Page: 7 NMI ENVIRONMENTAL MONITORING LABORATORIES, INC. 11e1 CLIENT REPORT Si 464 - East Weld Landfill Sample Point: TBK-GWMW03 ENS: 91-12476 Sampled: 9-DEC-1991 Proposed Disposal Facilit Sample Type: WELL MP: 464911 Received: 10-DEC-1991 Weld County CO 00000-0000 Sample Number: AE0979 REV: 00 Reported: 14-JAN-1992 Analyte Result EML RL Units Method VOLATILE ORGANICS: 1,1,1-TRICHLOROETHANE ND 5.000 UG/L VOMSAAN301 1,1,2,2-TETRACHLOROETHANE ND 5.000 UG/L VOMSAAN301 1,1,2-TRICHL0R0ETHANE ND 5.000 UG/L VOMSAAN301 1,1-DICHLOROETHANE ND 5.000 UG/L VOMSAAN301 1,1-DICHLOROETHANE ND 5.000 UG/L VOMSAAN301 1,2-DICHLOROBENZENE ND 10.000 UG/L VOMSAAN301 • 1,2-DICHLOROETHANE ND 5.000 UG/L VOMSAAN301 1,2-DICHLOROPROPANE ND 5.000 UG/L VOMSAAN301 1,3-DICHLOROBENZENE ND 10.000 UG/L VOMSAAN301 1,4-DICHLOROBENZENE ND 10.000 UG/L VOMSAAN301 2-CHLOROETHYLVINYL ETHER ND 20.000 UG/L VOMSAAN301 BENZENE ND 5.000 UG/L VOMSAAN301 BROMODICHLOROMETHANE ND 5.000 UG/L VOMSAAN301 BROMOFORM ND 5.000 UG/L VOMSAAN301 BROMOMETHANE ND 10.000 UG/L VOMSAAN301 CARBON TETRACHLORIDE ND 5.000 UG/L VOMSAAN301 CHLOROBENZENE ND 5.000 UG/L VOMSAAN301 CHLOROETHANE ND 10.000 UG/L VOMSAAN301 CHLOROFORM ND 5.000 UG/L VOMSAAN301 CHLOROMETHANE ND 10.000 UG/L VOMSAAN301 CIS-1,3-DICHLOROPROPENE ND 5.000 UG/L VOMSAAN301 DIBROMOCHLOROMETHANE ND 5.000 UG/L VOMSAAN301 ETHYLBENZENE ND 5.000 UG/L VOMSAAN301 METHYLENE CHLORIDE ND 5.000 UG/L VOMSAAN301 TETRACHLOROETHENE ND 5.000 UG/L VOMSAAN301 TOLUENE ND 5.000 UG/L VOMSAAN301 TRANS-1,2-DICHLOROETHENE ND 10.000 UG/L VOMSAAN301 TRANS-I,3-DICHLOROPROPENE ND 5.000 UG/L VOMSAAN301 TRICHLOROETHENE ND 5.000 UG/L VOMSAAN301 TRICHLOROFLUOROMETHANE ND 10.000 UG/L VOMSAAN301 VINYL CHLORIDE ND 10.000 UG/L VOMSAAN301 NA - Not Analyzed ND = Not Detected TBK = Trip Blank 9/j1_.:32 buocontract To: • AquaPal" PREP W M I Environmental Monitoring Laboratories, Inc. AquaPak" it ZZ-- Date Sealed 171 /I mo/ I / al/L5-1 FIELD CHAIN-OF-CUSTODY RECORD 1.-Y1YI / MM 0D Seel# - p S. . L/FACILITY 01(14I I SITE NAME: East Weld Landfill By:fp in -,S 9/ Sample Point: w 6 u/M tt/ 0 I Souse Cad. SAMPLE DATE: - 19 I/ I ) 17-I0i `jI yY/MM/OD SAMPL TIME: I / I` I : I L/ISf MATRIX CODE: Water (w) Leachate . (C) Source Coees (MO Rat ' Soil (S) Other (9 Well . •>. (W) Leachate System . .(C) -Pretreatment Facility. .. (P) River/Stream/Brook . .IR) Soil (S) Gereration Pt . .(0) Dewatering/Pressure Relief. . . .(0) Gas Condensate. . .I hi) Influent (U) Lake or Ocean (Lt Bottom Sediment. . .(B) Other (X) Surface Water Impoundment . .. (I) Air (A) Effluent (T) Outfall (01 Noise .}p' (N) Specify ENS # 91- 12476 AquaPak" CONTENT SAMPLE. *OF BOTTLE PRESERVATIVE' FILTER FIELD *E.M.L. I.D. BOTTLES TYPE TYPE ANALYTES/LAB GROUPS Y_N COMMENTS COMMENTS AE0981-A 01 P Dui $g v-----IC AE0981-8 U1 P kN0.3 SS A80981-C 01 U 42SO4 CH AC0981-D 02 G .A!'LSU4 CR /CI f AE0981-E 01 G -RA2S03 CR v/ .AE0981-F 01 P SONE/COOL 4 DEG C CR AE0981-G 01 \ P HNO3 IN ( N AE0981-H 01 P HNO3 IN v N AE0981-I 01 p NO3 IN 2-1; ''0981-J 01 P NO3 IN N 4. )981-K 01 G ONE/COOL 4 DEG C 1N '" N A&U981-L - 01 P ONE/COOL 4 DEG C IN v N AE0981—M 02 G ONE/COOL 4 DEG C SV iilsi f... . AEOYU1—N- .OZ G ONE/COOL 4 DEG C SY vi-r1 A80901—P 04 G CL V0 X.-4 AE0981—Q 01 G CL V0 \-.><N1 9 s-9fS1 CHAIN OF CUSTODY CHRONICLE 1 AquaPak" Ope�pd Ry (print) f�(G h j �"5 j�=�l - Date: / 2/ 6 /9/ Time: �� . D 2400 HR. Signature: ��GL' ' /��ds Seal #: 2 a/6 Intact: 9E'-r I have received these materials in good condition from the above person. f; 2. Name: Signature: Date: / / Time: Remarks: 2400 Hf - ,, .,..,.,..- I have received these materials in good condition from the above person. 3. Name: - Signature: Date: / / Time: Remarks: — --- --,_ 2400 HR. // �J AquaPak"/Sub-Contr. # Sealed By9/ti. 1,1k7 7 e»+/lr7Date: L2 ICI "7I Time: A' 1 is— C7-1 -- /(Pnn') 2400 HR. Signature: , /://,:e ----=' Seal #:30y3� Intact:_ LAB USE ONLY .Opened By: 'signs' e s Date: /P//Q l '�//�9/Time: // `- r`� r A � 3 gt7 x400 HR. quaPak"/Sub. Contr # Temp Seal # Intact. : .,:,_ '.' � REGION 1 ' Site # Udaki W M I Environmental Monitoring Laboratories, Int. ' I r} ,-1 II Bottle Set: _7 _1ll)/ I "ELD INFORMATION FORM - Sample Point: IS 4 w Al w 0 / Source Code PURGING INFORMATION 9 / 1 2 0 , Laid 0,b 3.y r - PURGE DATE START PURGE ELAPSED FIRS WATER VOL.IN CASING ACTUAL VOLUME PURGED (YY MM DO) (2400 Hr CIoc4) (Gallons) (Gallons] \ _ PURGING AND SAMPLING EQUIPMENT Purging Equipment Dedicated 4° e one) I N l.f I Sampling Equipment Dedicated I N I 2ts o ) Purging Device I_6 I A-Submersible Pump D-Gas Lift Pump G-Bailer C PURGING OTHER(SPECIFY) Sampling Device I G I B-Peristaltic Pump E-Venturi Pump H-Scoop/Shovel X- SAMPLING OTHER(SPECIFY) C-Bladder Pump F-Dipper/Bottle I-Piston Pump Purging Material I P I ATeflon C-Polypropylene E-Polyethylene X- PURGING OTHER(SPECIFY) Sampling Material I P I B-Stainless Steel D-PVC X- SAMPLING OTHER(SPECIFY) Tubing-Purging I C I A-Teflon D-Polypropylene F-Silicon X- PURGING OTHER(SPECIFY) Tubing-Sampling B-Tygon E-Polyethylene G-Combination teflon/X- C-Rope X- /7r/en Polypropylene SAMPLING OTHER(SPECIFY) (SPECIE Filtering Devices 0.45 All I A-In-line Disposable B-Pressure C-Vacuum - FIELD MEASUREMENTS Well Elevation I III I (ft/msl) Land Surface Elevation (fVmsl) Depth to water Depth to water From top of well casing I I 1 ;4 ?j 3I`/I (It) From land surface - (ft) oundwater Elevation I L I I j—I--"(tthnsl) Groundwater Elevation (ft/msl) Well Depth I I 15- 10171,-/I (ft) Stickup (ft) 1st La (STD) 1st I IqI I I `_ bj t 25° C Sa le Temp. I I 1 IO j71(° C) ph spec.cond. 2nd I hjd01 (STD) 2nd 11911 IaI0j t 5°C IIIIII I _ I ph spec.cone). (PIMP punier) value ones 3rd I I7jDI /I (STD) 3rd I hI/ Is-IOj atn/cm25° C I I �1 u ph spec.cond. - (other parameter) vMu undo 4th I 17;01 II (STD) 4th I ICI I i Ir 14 at 25° C . I I I I I I I ( ph spec con°. (other pMMnew) wet units FIELD COMMENTS LL Sample Appearance: C 4.4 Odor: AA H C. Color: 1:.,141 17--of.,./in Turbidity: 4,4,,! Je Dt app( able) Cr- Weather Conditions: Wind Speed (&/hi Direction fill Precipitation Y/N Outlook an-•"- Specific Comments: t7 's' = a 9 39 1(-+id Urpi = 5-0.3 — / 3 1. oo <l- o f „,,,),-- 7e 4. ti =)_^ ) 160 ff (0 X i 5`11 3 -p(• / = '/23 3- 'di) = l0•,/./1.,/ 1.a cwjr I certify that samplingprocedures-were in.accordance with applicable EPA, State and WMI protocols. \2 / o/i/P I /u - Employer: £,/M ,] Metsl .- (Stgnartrel 1?89 a AquaPar PREP WMI Environmental Monitoring Laboratories, Inc. AquaPak� # „ � Date Sealed L ILl/l2IP' SI FIELD CHAIN-OF-CUSTODY RECORD W , 'MM / DO Seal# 309 E. /FACILITY #4041 1 I SITE NAME: East Weld Landfill By; ee is 5'`�I Sample Point: vi 6 '✓ IW1 ' w. 0 2 Source Code SAMPLE DATE: - i ii I ) I)-101ci1 TYIMM/OD SAMPLE TIME: I I I$ I : Id In I MATRIX CODE: 't' Water (eV) Leachate . (C) Source Coaes: (2400 RR) i Soil (S) Other (X) Well (W) Leachate S stem ' Dewatenn /Pressure Relief. . Y •ICI Influent Facility Riva/Stream/Brook . . (R) Soil (B) Generation th Pt.. . . .(X) 9 ..1(I) Gas Oonoensate. . .(A) Effluent ID) Outt I Ocean ILI Bottom SeCiment IN) )( Surface Water Impoundment. .. pl Air Al Effluent IT) Ou[MI (OI Noise IN) Specify ( ) ENS # 91-12476 AquaPalr CONTENT ' :'SAMPLE it OF BOTTLE PRESERVATIVE FILTER FIELD • E.M.L. LO. BOTTLES TYPE TYPE ANALYTES/LAG GROUPS Y_N COMMENTS COMMENTS AE0980-A 01 P' N03 SB `�k AE0980-B . 01 P :N03 SB Y`V AE0980-C - 01 G • 2504 CR Y N A80980-D '02 G 2504 CR • Y N AE0980-E 01 G A2503 CR ` r A '0980-F 01 P ONE/COOL 4 DEG C ' CR Y � A' r98. -G 01 P :N03 IN L e 0980-H 01 P :N03 IN Y`� A ' r980- 01 P N03 IN YJ N A ' '980-J 01 P : N03 IN 980-K 01 G ONE/COOL 4 DEG C IN Y N A.0900—L 01 P e . • r N A 0 80—M 02 G ONE/COOL 4 DEG C SV YC ' AE0980-N 02 G ONE/COOL 4 DEG C SV Y AE0980-P 04 G CL VO `G AE0980-Q 01 G CL VO T � - CHAIN OF CUSTODY CHRONICLE 1. AquaPakm 0 (prim) l�atic(� /�./o Date: /2- 1 t6 /9/ Time: /r' 'i� // 2400 HR. Signature: -trY,-i/l�/`- - ) Seal i1: •7/) 9 Intact: yg,f I have received these materials in good condition from the above person. 2. Name: Signature: Date: / / Time: - Remarks: 2400 HR. - -a.,�.: I have received these materials in good condition from the above person. 3. Name: Signature: Date: / / Time: Remarks: __ 2400 HR. / A uaPak' /Sub Contr. # ' -Sealed B : a4 i q � �,c / Y. ( � ��p��0 1.A,S Date: / )-/ 61/41/ Time: / .;` : � S P m 2400 HR. Signature. /%£� _�1) Seal #:706 yy Intact: LAB USE ONLY// Jd� Opened By is '" � � Date: / 9�Time: 47UV 2400 HR AquaPak'a/Sub. Contr # S9/7 1 Temp°C Seal # C901Intact. T REGION -. • i Site # LZ:=PI`i"I W M I Environmental Monitoring Laboratories, Inc. Bottle Set: I9 I1 L ?9 fl O nELD INFORMATION FORM Sample Point: H 4 n/I,h v]ola1 a Source Code PURGING INFORMATION I9 Ii Ii 1210171 I ► too o,sf • ?el giej PURGE DATE START PURGE ELAPSED HAS WATER VOL IN CASING ACTUAL VOLUME EJRGED (yy MM 00) (2100 Hr Clock) -(Gallons) (Gallons) PURGING AND SAMPLING EQUIPMENT Purging Equipment Dedicated° F N l Sampling Equipment Dedicated �Y I N °rcle anal 0 (circle one) i Purging Device L1 A-Submersible Pump D-Gas Lift Pump G-Bailer X- PURGING OTHER(SPECIFY) Sampling Device I a I B-Peristaltic Pump E-Venturi Pump H-Scoop/Shovel X- SAMPLING OTHER(SPECIFY) C-Bladder Pump F-Dipper/Bottle I-Piston Pump Purging Material _____I ATeflon C-Polypropylene E-Polyethylene X- PURGING CrHER(SPECIFY) Sampling Material LJ B-Stainless Steel D-PVC X- SAMPLING OTHER(SPECIFY) Tubing-Purging G C I A-Teflon D-Polypropylene F-Silicon X- - PURGING OTHER(SPECIFY) Tubing-Sampling I GJ BTygon E-Polyethylene G-Combination teflon/X- C-Rope X- NY/on Polypropylene S4IPLINGTYHER(SPECIFY) Filtering Devices 0.45 p:I a I A-In-line Disposable B(-SPressPECIFY)ure C-Vacuum FIELD MEASUREMENTS Well Elevation I I I I kJ__ (ft/msl) Land Surface Elevation (ft/msl) Depth to water Depth to water From top of well casing I I 131 314/1 d-•I (ft) From land surface on undwater Elevation +4-±-1-±:11-tft/msl) Groundwater Elevation (ft/msl) Well Depth I 11 SI Ol 91 aY (ft) Stickup I I I I l" (ft) n 1st I I71) 101 (sTD) 1st 1 I BIS19ID1 at 25° C Sample Temp. I I I alai (° C) ph spec.cone. 2nd I 1111 IT I (STD) 2nd I I $IS I6lol at 25° C U ph sPeC.C°na In.ParamNa,) value unrla 3rd I I7l I I`!l (STD) / 3rd I P 1517104 at 25° C I I L__ I ph spec.cond ' lather perimeter) you umN 4th I X71/ 19 I (STD) 4th I I I6 I0 I01 at 25° C I I ph spec cone. Ices eenanwer) "W. u FIELD COMMENTS Sample Appearance: C / Odor: i✓oke_ Color: /;9k4- 91-n.,M Turbidity: /✓IoL, z& bt ap cable) Weather Conditions: Wind Speed rr )Pa-1 Direction Cc. live Precipitation Y/N Outlook C/r'G-. Specific Comments: 1 T. W --- 7 3 5/z T 14 T),°e 4,/ - CO. V - ( 7.4/0 ' f! _✓,%r. re/ ) 7 1/4)re a?) = a c 5,.,t ,n wilt (64.-,,, x 3 = 8.s 9.i f0 p le t e I certify that incss"a_mpl procedures were in accordance with applicable EPA, State and WMI protocols. 12 /09/ul / ` ��,1 e — - Employer: l#1//11 r (DUO (Signature) 9:::#0239 EMT Fr-2A 4/20 AquaPak- PREP W M I Environmental Monitoring Laboratories, Inc. - AquaPak- # 3d • I FIELD CHAIN-OF-CUSTODY RECORD 0 Date Sealed gltl.1 M _ '/ _ MM / OD Y J DD F1� Seal# w�j(tf:,J( 'E/FACILITY #1404 III I I SITE NAME: East Weld Landfill By: FP- Sample Point: "± 4 k- 4^ V D I-3 source COee • SAMPLE DATE: - III/ I/ 12 10 1 71 , VV I MM 100 SAMPLE TIME: I U31I: 1/ IC-I MATRIX CODE: W • Water (W) Leachale (C) Source Codes-. Soil (S) Other PO Well • A.•• • • (WI Leachate S stem Dewalering/Pressure Relief. . Y •)M) Pretreatment Facility. . . (PI Liver or Ocm/6rook . . IRL) Soil (SI OtheraOon PL. . . . G.(G) Gas Condensate. . .(M) Influent IT) Lakeor Ocean (L1 Noiem Se-invent. . .(BI Specify eci ( )Surface Water Impoundment .'. . Ill Air IAI Effluent IT) Outfall 1O1 Noise (XI (N) ' ENS # 91-12476 AquaPak" CONTENT SAMPLE 0 OF BOTTLE PRESERVATIVE FILTER FIELD E.M.I.. I.D. BOTTLES TYPE TYPE ANALYTES/LAB GROUPS Y-N COMMENTS COMMENTS - A1{U9'/9-A 01 P HNU3 • SB AEO979-B 01 P RNO3 SB . \` AE0979-C 01 G 42304 LE !] N AE0979-D 02 G ¢hl,U4 LB• N AEO979-E 01 G 4A2S03 CR ��/ AE0979-F 01 P ,TONE/COOL 4 DEC C CR %1 AE0979-G 01 P JNO3 IN AE0979-R 01 P 3103 IN Y AE0979-I 01 P 103 IN N 4EO979-J 01 P 4103 IN Y N r,,•'-,e, ;09'/9-E 01 G IONE/COOL 4 DEG C I1 47 /W _ tu9/9-L 01 P SUN$/LOOL 4 DBb t. IN ANUV/9-N 04 U, YUAL/COOL 4 DEU C SV v o,lly✓da,ne4o-C:113.C. AE09/9-N 04 U MUNE/COOL 4 DEG C SV Y vlJio/urrdo4;f/3 AEU9'/9-P O4 G LL YO Y REU9/9-u, U1 G iaCla VO v 5S.e - S_c4e CHAIN OF CUSTODY CHRONICLE �+ AquaPaktOpened By: .(print) = Date: �� /o� k7/ Time: _/0 : ,D 1. Signature:/L�r Li/ F --t Seal #:-293(bn+�'e.. ) Intact:I GS 0 HR. I have received these materials in good condition from the above person. - 2. Name: Signature: Date: / / Time: � Remarks: 2400 HR. I have received these materials in good condition from the above person. 3. Name: "Signature: Date: / / Time: Remarks: %�� 2400 HR. l - AquaPak"'/Sub Contr..# Sealed By 74 /dn.41... , Date: `i 1 / 09 /q/ Time: / :27 / (Pont) 2400 HR. Signature. / (47---14•—•-j-t---s• Seal #: 765347 Intact: L LAB USE ONLY. /� 7f /`esS BP Opened By: (Sign'`"re) (((�� Date: -/D/ 9" 'Time: ?/ :SS W p 2400 HR. AquaPak"'/Sub Contr # /8.g Temp°C Seal # 50,59c-'" Intact. 9,i'e3 ..r..I a N tr I v. 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A a Z > Z F N O 0 O 0 O a O a o m CO I 11(N I Z 0 I 1 I I I I I 1 1 I O I W Cu �I a1 m Q U, ❑I t0 m1 EOj, EI w ] 0 0 Z 0 Q 0 O 0 0 O 0 O 0 O O O U O U 0 m W .H W H U, 'y w F.IX !, m on a m x m m m m m m m m m m co w m O m ON ON ON OZ m 0 0 o w c)E rn m rn m m rn m rn rn m m a rn Q 01 01 0% rn 0, rn o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 a Q W W W W Y.3 W w W W W W w W W W W w w a < a Q a a a a a a a a a a a a < a 930.339 o o 0 0 0 0 0 .i N el el .i in .i In In OI a N a a a N N N 4 d a E 2 ❑ ❑ a a a a O ❑ 0 2 2 CO 0 a CO O 0 Et w7 W N H £F X a 0 Z CO C N X N H Cal CO a 0 Ho H .4 N 0 a N 0 0 m 0 Z IllIA W > a w3 w > a0 a F 0 0 W oo w W a 404 N E-. a 0 CO CO a co r a r CO H F Q I H 0 0 CO ❑I Q H .4 W ro H I H c4 H Z 0 0 0 ❑I 0 H 0 0 F 4 ON 4 O O F a 2 I' Z 0 Z ❑I 2 p1 4 >I 2 >+ .4 4 W ❑ W H W a W 0 to P:F a N CO X co 1C a ❑ (m(yy Q a a a �.7 2 �W.7 U 14 41 0 0 2 Q a CO CO 4 N co 0 CO W OU W N m ts £ NNµ • 0 ^ CO o rC a do N a a to a y X X HF 0t' 0 H M 0 0 0 CO H H H a v, m Z Om`- M o H H �H H aq❑ �a ,0 0 CO Z H N ,Z # N 1 "� d RC 'C FC X X COHH X NE .C # 2 N 0 0 0H C 0 0 H H U w U H co # H Z Z Z Z Z Z Z Z 2 >H 00 >N # N 0 H H H H H H H H H CO H m a > F¢ co N Z Li o a °a w W W a a " w Z o m 0 0 0 O o 0 0 0 o ,-44.1 H a N O O 1 1 1 H h h h N N Z > 2 C 0 N _ I 1 I I I I L 04 I O I W Z RWC .i .i .i .co 4 .444444U '-40 N W 0 of E a co co co co co co co m m W MO O CO rn rn in m rn rn m rna m4 m # o 0 0 0 0 0 0 0 0 0 0 0 0 5 W W W CO W w co W CO W W W # a a 'C a a a a a a a 4 4 a # :-0 9. 89 APPENDIX I SOIL BALANCE DATA 33 EAST WELD LANDFILL SANITARY LANDFILL REVISED SOIL BALANCE 6/8/92 Area of Fill = 700 acres 700 ac * 43,560 ft2 = 30,492,000 ft2 Liner Material Needed (3' liner + 2' cap) = 5,646,667 CY (say 5,650,000 CY) Liner Material Available:** Phase 1: 726,805 CY Phase 2: 2,232,227 CY Phase 3: 641,527 CY Phase 4: 521,170 CY Phase 5: 1,517,479 CY Phase 6: 769,372 CY TOTAL 6,408,580 CY (say 6,410,000 CY) ** - DCA Earthwork Software Generated x'..;:'39 APPENDIX J HELP MODEL RESULTS 9: 0239 EWSL-HELP MODEL The HELP model has been revised to reflect the modifications of the final cover and drainage layer permeability. An open landfill was also simulated using the model. Case 1 Case 1 represents a closed landfill using the proposed design. The cap was modeled as having a top 21-inch evaporative root zone depth as specified by the model for areas similar to the site with fair grass conditions. This evaporative root zone depth may be effected by root penetration, evaporation and desiccation. This 21 inch layer, as it is designed, will consist of a 6 inch seed bed layer and 15 inches of the root and frost protection layer. These soils are assumed to have similar soil properties due to the availability of this type of material at the site (ie. sandy material). As a conservative estimate, initial soil moisture was set equal to the field capacity. The remaining portion of the root and frost protection layer (9 inches) was modeled as the same sandy material with a lower permeability because it will not be effected by roots and/or desiccation. Initial soil moisture content was set equal to the field capacity. The barrier soil cap was modeled with the design permeability of 1x1O cm/sec. The initial soil moisture content was set equal to the porosity. This is a conservative estimate due to the fact that the cap will be placed at near optimum moisture content conditions which is typically less than porosity. The foundation layer was modeled with a permeability of 1x10-5 cm/sec because it will not be considered a part of the barrier layer and will be compacted over refuse. It was assumed that a sandy soil will be used for this layer. The initial soil moisture content was set equal to porosity because, in order to achieve suitable compaction, moisture may need to be added. The refuse layer was modeled with a hydraulic conductivity of 1x10' cm/sec, and approximately 140 thick. The initial soil moisture content was set equal to the field capacity for a conservative estimate. The 12-inch drainage layer was modeled with the design permeability of 2x10= cm/sec. As a conservative estimate, the initial soil moisture content was set equal to field capacity. The minimum slope of the collection system design of 1 percent and the longest drainage path of 1600 feet were input into the model. 1 9a0.:39 The 3-foot barrier soil liner was modeled in the same manner as the barrier layer cap, but with the specified design permeability of 1x1O7 cm/sec. Climate data was synthetically generated by the model. Data was used for Denver, Colorado, and average monthly temperature and precipitation data was entered for years 1973-1990 from Brighton, Colorado to generate site specific climate data. Soil parameters were taken from the model using information for site specific soil types. The HELP model output is included with this response document as Attachment 3. The results show that the design will function as an efficient system for controlling the generation of landfill liquids. Also, the output shows that the design will prove to effectively collect any liquids that are generated. A peak daily value of landfill liquid expected on the barrier layer is 0.9 inches. Case 2 Case 2 represents the landfill as open using the proposed design. It was assumed that 15 acres may be open at one time as a worse case scenario of operations. The minimum slope of the leachate collection system of the landfill, 1%, was used over a drainage length of 654 feet. The top 6 inches was modeled as daily cover material. The daily cover layer was assumed to be bare ground. As a conservative estimate, initial soil moisture was set equal to the field capacity. The refuse layer was modeled with a hydraulic conductivity of 1x1O3 cm/sec, and approximately 15 feet thick. The initial soil moisture content was set equal to the field capacity for a conservative estimate. The 3-foot barrier soil liner was modeled with the design permeability of lx10"' cm/sec. The initial soil moisture content was set equal to the porosity. This is a conservative estimate due to the fact that the cap will be placed at near optimum moisture content conditions which is typically less than porosity. The 12-inch drainage layer was modeled with the design permeability of 2x1O2 cm/sec. As a conservative estimate, the initial soil moisture content was set equal to field capacity. Climate data was synthetically generated by the model. Data was used for Denver, Colorado, and average monthly temperature and precipitation data was entered for years 2 92089 1973-1990 from Brighton, Colorado to generate site specific climate data. Soil parameters were taken from the model using information for site specific soil types as in Case 1. The results show that the design will function as an efficient system for controlling the generation of landfill liquids during open phases of operation. Also, the output shows that the design will prove to effectively collect any liquids that are generated. A peak daily value of landfill liquid expected on the barrier layer during operations is 0.3 inches. The output for Case 1 and Case 2 are attached as EWSL - CLOSED and EWSL - OPEN, respectively. 3 30:0 83 *********************************************************************** *********************************************************************** EWSL - CLOSED 8/5/92 *********************************************************************** *********************************************************************** LAYER 1 VERTICAL PERCOLATION LAYER THICKNESS = 21. 00 INCHES EVAPORATION COEFFICIENT = 5. 100 MM/DAY**0. 5 POROSITY = 0. 4370 VOL/VOL FIELD CAPACITY = 0. 1050 VOL/VOL WILTING POINT = 0. 0470 VOL/VOL INITIAL SOIL WATER CONTENT = 0. 1050 VOL/VOL SATURATED HYDRAULIC CONDUCTIVITY = 0. 0010000000475 CM/SEC LAYER 2 VERTICAL PERCOLATION LAYER THICKNESS = 9 . 00 INCHES EVAPORATION COEFFICIENT = 3 . 327 MM/DAY**0. 5 POROSITY = 0. 4370 VOL/VOL FIELD CAPACITY = 0. 1050 VOL/VOL WILTING POINT = 0. 0470 VOL/VOL INITIAL SOIL WATER CONTENT = 0. 1050 VOL/VOL SATURATED HYDRAULIC CONDUCTIVITY = 0. 0000999999975 CM/SEC LAYER 3 BARRIER SOIL LINER THICKNESS = 18 . 00 INCHES EVAPORATION COEFFICIENT = 3 . 300 -MM/DAY**0. 5 POROSITY = 0 . 4640 VOL/VOL FIELD CAPACITY = 0 . 3100 VOL/VOL WILTING POINT = 0 . 1870 VOL/VOL INITIAL SOIL WATER CONTENT = 0. 4640 VOL/VOL SATURATED HYDRAULIC CONDUCTIVITY = 0. 0000010000000 CM/SEC LAYER 4 VERTICAL PERCOLATION LAYER THICKNESS = 6. 00 INCHES EVAPORATION COEFFICIENT = 3 . 327 MM/DAY**0. 5 POROSITY = 0.4370 VOL/VOL FIELD CAPACITY = 0. 1050 VOL/VOL WILTING POINT = 0. 0470 VOL/VOL INITIAL SOIL WATER CONTENT = 0. 4370 VOL/VOL SATURATED HYDRAULIC CONDUCTIVITY = 0. 0000999999975 CM/SEC LAYER 5 VERTICAL PERCOLATION LAYER THICKNESS = 1680. 00 INCHES EVAPORATION COEFFICIENT = 5. 100 MM/DAY**0. 5 POROSITY = 0. 5200 VOL/VOL FIELD CAPACITY = 0. 2940 VOL/VOL WILTING POINT = 0. 1400 VOL/VOL INITIAL SOIL WATER CONTENT = 0. 2940 VOL/VOL SATURATED HYDRAULIC CONDUCTIVITY = 0. 0010000000475 CM/SEC SiZeD89 LAYER 6 LATERAL DRAINAGE LAYER THICKNESS = 12 . 00 INCHES EVAPORATION COEFFICIENT = 3 . 300 MM/DAY**0 . 5 POROSITY = 0. 4170 VOL/VOL FIELD CAPACITY = 0. 0450 VOL/VOL WILTING POINT = 0. 0200 VOL/VOL INITIAL SOIL WATER CONTENT = 0. 0450 VOL/VOL SATURATED HYDRAULIC CONDUCTIVITY = 0. 0199999995530 CM/SEC SLOPE = 1. 00 PERCENT DRAINAGE LENGTH = 1600. 0 FEET LAYER 7 BARRIER SOIL LINER THICKNESS = 36. 00 INCHES EVAPORATION COEFFICIENT = 3 . 300 MM/DAY**0. 5 POROSITY = 0. 4640 VOL/VOL FIELD CAPACITY = 0. 3100 VOL/VOL WILTING POINT = 0. 1870 VOL/VOL INITIAL SOIL WATER CONTENT = 0 . 4640 VOL/VOL SATURATED HYDRAULIC CONDUCTIVITY = 0. 0000001000000 CM/SEC GENERAL SIMULATION DATA SCS RUNOFF CURVE NUMBER = 79 . 00 TOTAL AREA OF COVER =30500000. SQ FT EVAPORATIVE ZONE DEPTH = 21. 00 INCHES EFFECTIVE EVAPORATION COEFFICIENT = 5 . 100 MM/DAY**0. 5 UPPER LIMIT VEG. STORAGE = 9. 1770 INCHES INITIAL VEG. STORAGE = 2 . 2050 INCHES SOIL WATER CONTENT INITIALIZED BY USER. 92,0---'39 CLIMATOLOGICAL DATA SYNTHETIC RAINFALL WITH SYNTHETIC DAILY TEMPERATURES AND SOLAR RADIATION FOR DENVER COLORADO MAXIMUM LEAF AREA INDEX = 2 . 00 START OF GROWING SEASON (JULIAN DATE) = 128 END OF GROWING SEASON (JULIAN DATE) = 284 NORMAL MEAN MONTHLY TEMPERATURES, DEGREES FAHRENHEIT JAN/JUL FEB/AUG MAR/SEP APR/OCT MAY/NOV JUN/DEC 27 . 90 33 . 00 40. 50 48 . 90 57 .50 68 . 10 73 . 20 70. 50 62 . 60 51. 50 37 . 80 29 . 50 AVERAGE MONTHLY VALUES IN INCHES FOR 1 THROUGH 10 JAN/JUL FEB/AUG MAR/SEP APR/OCT MAY/NOV JUN/DEC PRECIPITATION TOTALS 0. 50 0. 31 1. 03 0. 86 2 . 05 1 . 85 1. 27 1. 30 0. 85 0. 53 0. 99 0. 73 STD. DEVIATIONS 0. 33 0. 25 0.42 0. 69 1. 10 0 .70 0. 77 0. 73 0. 30 0. 45 0. 60 0 . 50 RUNOFF TOTALS 0. 000 0. 000 0. 000 0. 000 0. 000 0 . 000 0. 000 0. 000 0. 000 0. 000 0. 000 0 . 000 STD. DEVIATIONS 0. 000 0. 000 0. 000 0. 000 0. 000 0 . 000 0 . 000 0. 000 0. 000 0. 000 0. 000 0 . 000 98095 EVAPOTRANSPIRATION TOTALS 0. 565 0. 533 0 . 699 0 . 869 1. 487 2 . 993 1 . 371 1. 184 0. 855 0. 399 0. 518 0 . 686 STD. DEVIATIONS 0. 356 0. 306 0 . 226 0 . 767 0 . 582 0. 913 0 . 784 0. 686 0. 584 0 . 221 0. 194 0. 346 PERCOLATION FROM LAYER 3 TOTALS 0 . 0000 0 . 0000 0 . 0000 0 . 0000 0 . 0000 0. 0000 0. 0000 0 . 0000 0. 0000 0. 0000 0. 0000 0. 0000 STD. DEVIATIONS 0. 0002 0. 0000 0. 0000 0. 0000 0. 0000 0 . 0000 0. 0000 0. 0000 0. 0000 0. 0000 0 . 0000 0 . 0000 LATERAL DRAINAGE FROM LAYER 6 TOTALS 0. 3519 0. 3442 0. 3727 0. 3532 0. 3578 0. 3383 0. 3430 0. 3366 0. 3198 0. 3245 0. 3085 0. 3131 STD. DEVIATIONS 0. 1799 0. 2162 0.2353 0. 2200 0. 2204 0. 2040 0. 2051 0. 1996 0. 1880 0. 1893 0. 1785 0. 1798 PERCOLATION FROM LAYER 7 TOTALS 0. 1066 0. 0973 0. 1070 0. 1035 0. 1070 0 . 1042 0. 1077 0. 1077 0. 1042 0. 1077 0 . 1042 0. 1077 STD. DEVIATIONS 0. 0033 0. 0028 0. 0021 0. 0022 0. 0022 0 . 0000 0. 0000 0. 0000 0. 0000 0. 0000 0. 0000 0 . 0000 *********************************************************************** 920989 AVERAGE ANNUAL TOTALS (AND STD. DEVIATIONS) FOR 1 THROUGH 10 (INCHES) (CU. FT. ) PERCENT PRECIPITATION 12 . 26 ( 2 . 366) 31150670. 100 . 00 RUNOFF 0. 000 ( 0. 000) 49 . 0 . 00 EVAPOTRANSPIRATION 12 . 158 ( 2 . 284) 30902764 . 99 . 20 PERCOLATION FROM LAYER 3 0 . 0000 ( 0 . 0002) 127 . 0. 00 LATERAL DRAINAGE FROM 4 . 0638 ( 2 . 4033) 10328718. 33 . 16 LAYER 6 PERCOLATION FROM LAYER 7 1.2650 ( 2 . 4033) 3215124 . 10. 32 *********************************************************************** *********************************************************************** PEAK DAILY VALUES FOR 1 THROUGH 10 (INCHES) (CU. FT. ) PRECIPITATION 1. 21 3075416. 7 RUNOFF 0. 000 490.9 PERCOLATION FROM LAYER 3 0. 0000 46 . 2 HEAD ON LAYER 3 0. 1 LATERAL DRAINAGE FROM LAYER 6 0. 0330 83964 . 0 PERCOLATION FROM LAYER 7 0. 0035 8868 . 6 HEAD ON LAYER 7 0. 9 SNOW WATER 0. 82 2079415. 2 MAXIMUM VEG. SOIL WATER (VOL/VOL) 0. 1584 MINIMUM VEG. SOIL WATER (VOL/VOL) 0. 0470 *********************************************************************** *********************************************************************** 920989 *********************************************************************** *********************************************************************** EWSL - OPEN 8/5/92 *********************************************************************** *********************************************************************** LAYER 1 VERTICAL PERCOLATION LAYER THICKNESS = 6. 00 INCHES EVAPORATION COEFFICIENT = 3 . 327 MM/DAY**0. 5 POROSITY = 0. 4370 VOL/VOL FIELD CAPACITY = 0. 1050 VOL/VOL WILTING POINT = 0. 0470 VOL/VOL INITIAL SOIL WATER CONTENT = 0. 1050 VOL/VOL SATURATED HYDRAULIC CONDUCTIVITY = 0. 0000999999975 CM/SEC LAYER 2 VERTICAL PERCOLATION LAYER THICKNESS = 180. 00 INCHES EVAPORATION COEFFICIENT = 5. 100 MM/DAY**0. 5 POROSITY = 0 . 5200 VOL/VOL FIELD CAPACITY = 0. 2940 VOL/VOL WILTING POINT = 0 . 1400 VOL/VOL INITIAL SOIL WATER CONTENT = 0 . 2940 VOL/VOL SATURATED HYDRAULIC CONDUCTIVITY = 0. 0010000000475 CM/SEC 920989 LAYER 3 LATERAL DRAINAGE LAYER THICKNESS = 12 . 00 INCHES EVAPORATION COEFFICIENT = 3 . 300 MM/DAY**0. 5 POROSITY = 0. 4170 VOL/VOL FIELD CAPACITY = 0. 0450 VOL/VOL WILTING POINT = 0. 0200 VOL/VOL INITIAL SOIL WATER CONTENT = 0. 0450 VOL/VOL SATURATED HYDRAULIC CONDUCTIVITY = 0. 0199999995530 CM/SEC SLOPE = 1. 00 PERCENT DRAINAGE LENGTH = 654 . 0 FEET LAYER 4 BARRIER SOIL LINER THICKNESS = 36. 00 INCHES EVAPORATION COEFFICIENT = 3 . 300 MM/DAY**0.5 POROSITY = 0.4640 VOL/VOL FIELD CAPACITY = 0. 3100 VOL/VOL WILTING POINT = 0. 1870 VOL/VOL INITIAL SOIL WATER CONTENT = 0. 4640 VOL/VOL SATURATED HYDRAULIC CONDUCTIVITY = 0. 0000001000000 CM/SEC GENERAL SIMULATION DATA SCS RUNOFF CURVE NUMBER = 79 . 00 TOTAL AREA OF COVER = 654000. SQ FT EVAPORATIVE ZONE DEPTH = 14. 00 INCHES POTENTIAL RUNOFF FRACTION = 1. 000000 EFFECTIVE EVAPORATION COEFFICIENT = 3 .757 MM/DAY**0. 5 UPPER LIMIT VEG. STORAGE = 6.7820 INCHES INITIAL VEG. STORAGE = 2 . 9820 INCHES SOIL WATER CONTENT INITIALIZED BY USER. 920989 CLIMATOLOGICAL DATA SYNTHETIC RAINFALL WITH SYNTHETIC DAILY TEMPERATURES AND SOLAR RADIATION FOR DENVER COLORADO MAXIMUM LEAF AREA INDEX = 0. 00 START OF GROWING SEASON (JULIAN DATE) = 128 END OF GROWING SEASON (JULIAN DATE) = 284 NORMAL MEAN MONTHLY TEMPERATURES, DEGREES FAHRENHEIT JAN/JUL FEB/AUG MAR/SEP APR/OCT MAY/NOV JUN/DEC 27 . 90 33 . 00 40 . 50 48 . 90 57 . 50 68 . 10 73 . 20 70. 50 62 . 60 51. 50 37 . 80 29 . 50 *********************************************************************** AVERAGE MONTHLY VALUES IN INCHES FOR 1 THROUGH 2 JAN/JUL FEB/AUG MAR/SEP APR/OCT MAY/NOV JUN/DEC PRECIPITATION TOTALS 0 . 29 0. 34 1. 31 0 . 30 1. 90 1. 61 1. 98 1. 59 1. 24 0 . 90 1. 00 0. 44 STD. DEVIATIONS 0. 13 0. 35 0. 11 0. 18 0. 85 1. 52 0. 07 0. 64 0. 16 0. 39 0. 33 0 . 39 RUNOFF TOTALS 0. 000 0. 000 0. 000 0. 000 0 . 001 0 . 000 0 . 000 0. 000 0. 000 0. 000 0 . 000 0 . 000 STD. DEVIATIONS 0. 000 0 . 000 0 . 000 0. 000 0 . 001 0. 000 0. 000 0. 000 0 . 000 0. 000 0 . 000 0 . 000 942O989 920989 N m pp ✓• u N In P P N m a Q N M O 0 M M N- N. O IA N M '0 O . VVVV N V in in N N N N N Y • tlN 0 0 0 0 0 0 0 0 0 0 0 •O •-r N M N N N II > N N Q • •• N 0 0 0 0 0 0 0 0 0 0 N ' 0 0 in WI in M > u Y u u sr tl CO• � a 0 0 0 0 0 0 0 0 0 O r r .O y p ' ' •- A. N II N • N G > II 0 0 0 0 0 0 N A .O .O N .p .O in V M M N -- II Y N ✓ Y on O r N ' M ��{{ M N. M O ' P CO N. ' ' Y N M M M N N N II III I at II O N A N N COO P N. J M M N N N N 0 II I• II I p� pp. p CO MI MI I II in N ' d N A N Z 'O M N N ' A .O ' ^ ' WN Y M .0 A .O Y1 V M N N II II 0 0 0 0 0 0 0 0 0 0 0 .O r N M N N Al N r > II II '• II IL Ia O II 0 0 0 0 0 0 0 0 0 0 O 0 0 0 0 0 0 0 u z II II N Y m •• II 0 0 0 0 0 0 0 0 0 0 CO ' A V M M N N > II W O II 44 Z A II 0 0 0 0 0 0 0 0 0 0 O - M C N N r r to II 0L 3 II O O II g• IS,En j II 0 0 0 0 0 0 0 0 0 O r r N M N N N r Y 11 • II J Y II a II 3: d II 0 0 0 0 0 0 0 0 0 0 0 0 r M A ' A in O m I r ,_ 13 I a I K > > I O O O O O O N A .O N M M MN N NN I- I N N "2 I 2 I V 1 U 0 0 0 0 0 0 0 0 0 0 r N M M in N r .- Ill I Y. I d 1 •• I O O r v1 ' M V in V 0 ' 10 ' O P co A I N M M M 01 N 1 M I 0 0 0 0 0 0 0 0 0 r M V C A co co A .O 1 1 I p O N A N N Cop P CO A its V M N N N N 0. A I r I N I O O O O O O O O r N V In V V in N V M I I E N 11 O r N M 't v1 .O A CO Q O r N M VIA .0 A CO O O r• CO in V In .O A CO P O U N N N N N N N N N N M M M M M M M M M M V V V V V V V V V V Yl H II U 920989 N pp p N• Y O O N ^ ry p CO N N N ^ '0 V' C P I41 N II 03� ry01 OA_ N O a O O O �t ^ in N 1� ^ %� v M Al N Al 0 1L 0 N N N N a • 4 O O O M P M v 0 O N MV M M N N 0 CO N VV OO V It Pi IA II CI N 1� 0 1 O O O O O M A 0 N J P P CO A a C V N V N N IV N O O N A ' C A 0 W II Al M .t • M N N •- w II II A II 000000l000 A in O II w M J Y M N N N A in CV II II II r II 0 0 0 0 0 0 w M 0 IA N P A d '0 N > 11 ^ N X II II O N- II 0 0 0 0 0 0 0 0 0 w N N Al W II r II Z II N in m > II 0 0 0 0 0 N .0 4-' P A N J J M M Al N X ll V II 0 II S N ` m 1 O O O O O O N r r r r 0 0 0 0 0 1' 3 II o o II N. ^ II 0 0 0 N .0 0 g P 0 V .t .t 0 M 0 N MI J N N .5 M N N Al 3 0 0 II C m II W OI I Z > II 0 0 0 ., M N 0 P O 0. A v0 .t M M M N N o m X ii L. p a > > ' 11 0 000400000 — M v .t d M Al N N K II H In g II II 0 ii O M II 0 0 0 0 M .0 ' N M N 0 1�IN W II N M in A A .p 0 -N v 0 M CC °' II • a II II > II 0 0 0 0 0 w M <0 O ' O ^ ' a 0 A .0 X II N II II II II A II II 0 0 0 0 0 0 0 0 0 N- w 0 0 0 0 0 0 0 II II - II 0 0 0 0 0 0 0 .- N N Al01 IIr r n r - I X II II II WI N 0 0 0 0 0 0 0 0 0 0 0 w 01 M M 0 0 .0 II p II II E II O .- N M .t N .0 A CO P O w N M d N d A CO P O w N M d In .O A CO P O II N N N N N N N N N N M PI WI WI M M M A M In b .t d J .t .t J d .t .t in W 11 N r r r 920959 II • II N N M P P N p S. CO A in in in O Om v V A m n M •O poi A 90.. PO •O .mt v in N 0 N CO N N II II M 0 0 0 0 0 0 0 0 0 0 0 •O ' ' ' in V r b > b 0 II 3 — II 00 0 0 0 0 0 0 0 0 N ' 0 In ou. > II N 0 N in Y II 1 > Y 0 0 0 0 0 0 0 0 0 0 4- N 0 0 N N V N O. I II II 0 b O > II O O O O O O N m N V V N 0 N 0 CO N d H II N is UA II▪ 00 Y1 ' MI fV N .O M M V WI N A II ff VV M M M M M M M M N N m II II - II O N A V N N I1/n� V P f� .O in .O P N _ II N N m P P m 1` O N .4 M In N in N n bii mp p - II N N N •O N A N •O it; N 0 ' A C Y In M W U M •O A U30 V In N Nre m H II II II 0 0 0 0 0 0 0 0 0 0 0 V N M N N N A II I > II II CO II 0 0 0 0 0 0 0 0 0 0 0 0 N N N N N II y II Oa A n 0 0 0 0 0 0 0 0 0 0 0 0 M N V N Z n r II N s II CO — II 0 0 0 0 0 0 0 0 0 0 N ' A V In M N N W > p C m II •O a 0 0 0 0 0 0 0 0 0 0 0 0 In N C inPI 11 N N N o n o a Cl' 1 O I. ; " 0 0 0 0 0 0 0 0 0 0 •- N In N N N 0 11 o b 0. II 0 _ V II 0 0 0 0 0 0 0 0 0 0 O 0- V .O In M N .- N 11 u 9 II n N > > u in O a O O O N A •O in in M M N N N N N U II M II 00000 ,00 .- m V P P O .O N V y in M N le O 11 a II II O O r O I' M A V 1n •O O <6 In N 0 0. CO A A II 0.11•11•11.1 N N A II II II II N II n 0 0 0 0 0 0 •r •— M A ^ CO 0 N 0 W II N II II II O N A V V O .O .O In N .4 P •O V N •^ II N N m car. d A in V In N N N N I1 II II m 11 O O O O . N V m ^ NNII N N N r O m .O in PI it- tiII 11 0 III I O .- N M V in a A m P O . N M00 .0 N 0300 N M V N •O N CO 0. 0 a • • • • • • . • • • . • II N N N N N N N N N N M M in in in M in in M in .t of -t • -if -it .t • .f v 0 H 0 lli- 9209139 Y pp mm N N O O N O N 'O O ' 0 in n MP co 0. N. ' e- P t] N N N N N N 4- W Y CO II IN. 111 00 O O O d ' .f IN M0.73 $ N J a MM N N 11 II N▪ •- N O O O M P N ' MN P 'C In in M 0 P. N N O, CO Y V 11 N O "} p O m N O O O CO M A N V A N O ' P' 0 N .Im- p CO F. 0 P Y N N 11 O O N A �O N M .Of �t M N N r r 0 W 11 II N Y A 11 O O O O O N CO CO O A 0 m II e- M d v M a N N r CV 11 11 U 000000R- 04- '0 ' N 0 A d d in N X5 It N .- N a II IL ' 11 0 0 0 0 0 0 0 0 e- .} '0 IN1' tel l—' z CO N .' M II U NIn CO II O O O O O N NO e' N P A N .T -} in M N N W X II r t N M< Y K q ' N 010 000000s— N N e- e- O a co a O ] II 11 CC1� ' 11 O O O N NO CO -4P CO 41 �f d 03 M CD Y m 11 M V 1n N Y M N N ;,—,, O O N O. N _ > N O O O e� M N CO P O P A WI .f M M M N N r X 11 U 1 11 11 K > ' II 0 0 0 0 0 0 0 0 e- M N 41 IA J M N N I- g ii N 3 11 N CO F M 11 0010 O MI CO In 010 In 0 M a0 O M .f CO N N III I1 I N M in A %0 C CO in .f M co 0 II a 11 11 X 11 000004- 10430 N. a ' ' ' 0 ID A d N up- II 11 11 11 st II I1 0 0 0 0 0 0 0 0 0 0 e- N M J v M N 4- U u Y u MI 11 0 0 0 0 0 0 0 0 0 0 0 r N M M M N 11 11 11 II 0 0 0 0 0 0 0 e- N N N N e- e- e- r ^ e •-• Y Y X II II ni I1 0 0 0 0 0 0 0 0 0 0 N A ' CO ' ' A 11 11 11 II O e- N M g N 4O A CO P O e- N E • • • MS in ...3A CO P O N M44 in NO A CO P O i 11 N N N N N Al N N N N M M M MI 101 M M M M M d J d .1 .f d .1 .f .} 'S n I- u Y 920989 78-55 TABULAR DISCHARGE METHOD VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: Date: Subtitle: Pre-Construction Peak and Total Flaws Total watershed area: 0.811 sq mi Rainfall type: II Frequency: 10 ' years Subareas lA lB 2 3 4 Area(sq mi) 0.11* 0.16* 0.08* 0.12* 0.03* Rainfall(in) 2.6 2.6 2.6 2.6 2.6 Curve number 55* 55* 55* 55* 55* Runoff(in) 0.10 0.10 0.10 0.10 0.10 Tc (hrs) 1.05* 0.86* 1.17* 1.70* 0.69* (Used) 1.00 0.75 1.25 1.50 0.75 TimelbOutlet 0.00 0.00 0.00 0.00 0.00 Ia/P 0.63 0.63 0.63 0.63 0.63 (Used) 0.50 0.50 0.50 0.50 0.50 T Total Subarea Contribution to Total Flow (cfs) (hr) Flaw lA 1B 2 3 4 12.2 0 0 0 0 0 0 12.3 1 0 0 0 0 0 12.4 2 0 1 0 0 0 12.5 2 0 1 0 0 0 12.6 4 1 2 0 0 0 12.7 8 1 3P 1P 1 1P 12.8 8 1 3 1 1 1 13.0 10 2P 3 1 1 1 13.2 10 2 2 1 1 0 13.4 11P 2 2 1 2P 0 13.6 9 1 2 1 2 0 13.8 8 1 2 1 1 0 14.0 7 1 1 1 1 0 14.3 6 1 1 1 1 0 14.6 6 1 1 1 1 0 15.0 6 1 1 1 1 0 15.5 6 1 1 1 1 0 16.0 4 1 1 0 1 0 16.5 4 1 1 0 1 0 17.0 4 1 1 0 1 0 17.5 3 0 1 0 1 0 18.0 3 0 1 0 1 0 19.0 2 0 1 0 0 0 20.0 2 0 1 0 0 0 22.0 1 0 0 0 0 0 26.0 0 0 0 0 0 0 P - Peak Flaw * - value(s) provided from TR-55 system routines 920989 TR-55 TABULAR DISCHARGE METHOD VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: Date: _ Subtitle: Pre-Construction Peak and Total Flows Continuation of subarea information Subareas 5 6 7 8 9 Area(sq mi) 0.01* 0.23* 0.03* 0.00* 0.03* Rainfall(in) 2.6 2.6 2.6 2.6 2.6 Curve number 55* 55* 55* 55* 55* Runoff(in) 0.10 0.10 0.10 0.10 0.10 TO (hrs) 1.18* 1.47* 0.34* 0.27* 1.33* (Used) 1.25 1.50 0.30 0.30 1.25 TimeToOutlet 0.00 0.00 0.00 0.00 0.00 Ia/P 0.63 0.63 0.63 0.63 0.63 (Used) 0.50 0.50 0.50 0.50 0.50 Time Subarea Contribution to Total Flow (cfs) (hr) 5 6 7 8 9 12.2 0 0 0 0 0 12.3 0 0 1P 0 0 12.4 0 0 1 0 0 12.5 0 0 1 0 0 12.6 0 1 0 0 0 12.7 0 1 0 0 0 12.8 0 1 0 0 0 13.0 0 2 0 0 0 13.2 0 3P 0 0 1P 13.4 0 3 0 0 1 13.6 0 3 0 0 0 13.8 0 3 0 0 0 14.0 0 3 0 0 0 14.3 0 2 0 0 0 14.6 0 2 0 0 0 15.0 0 2 0 0 0 15.5 0 2 0 0 0 16.0 0 1 0 0 0 16.5 0 1 0 0 0 17.0 0 1 0 0 0 17.5 0 1 0 0 0 18.0 0 1 0 0 0 19.0 0 1 0 0 0 20.0 0 1 0 0 0 22.0 0 1 0 0 0 26.0 0 0 0 0 0 P - Peak Flow * - value(s) provided from TR--55 system routines • 920999 TR-55 CURVE NUMBER MUTATION VERSION 1.11 Project : E. -Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: Date: Subtitle: Pre-Construction Peak and Total Flows SUbarea : lA Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 69.7(55) - - - Total Area (by Hydrologic Soil Group) 69.7 SUBAREA: lA TOTAL DRAINAGE AREA: 69.7 Acres WEIGHTED CURVE NUMBER:55 TR-55 CURVE NUMBER OaMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: _ Date: Subtitle: Pre-Construction Peak and Total Floras Subarea : lB Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 102(55) - - - Total Area (by Hydrologic Soil Group) 102 SUBAREA: lB TOTAL DRAINAGE AREA: 102 Acres WEIGHTED CURVE NUMBER:55 920989 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: Date: Subtitle: Pre-Construction Peak and Total Flows Subarea : 2 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert Shrub fair 51.8(55) - - - Total Area (by Hydrologic Soil Group) 51.8 SUBAREA: 2 TOTAL DRAINAGE AREA: 51.8 Acres WEIGHED CURVE NUMBER:55 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: Date: _ Subtitle: Pre-Construction Peak and Total Flaws Subarea : 3 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Desert shrub fair 77.8(55) - - - Tbtal Area (by Hydrologic Soil Group) 77.8 SUBAREA: 3 TOTAL DRAINAGE AREA: 77.8 Acres WEIGHTED CURVE NUMBER:55 920959 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: _ Date: Subtitle: won Peak and Total Flows Subarea : 4 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 19.7(55) - - - Total Area (by Hydrologic Soil Group) 19.7 SUBAREA: 4 TOTAL DRAINAGE AREA: 19.7 Acres WEIGHTED CURVE NUMBER:55 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: _ Date: Subtitle: Pre-Construction Peak and Total Flows . Subarea : 5 Hydrologic Soil Grouup COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 9.4(55) - - - Total Area (by Hydrologic Soil Group) 9.4 SUBAREA: 5 TOTAL DRAINAGE AREA: 9.4 Acres WEIGHTED CURVE NUMBER:55 92O989 TR-55 CURVE NUMBER PUPATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: Date: _ Subtitle: Pre-Construction Peak and Total Flows Subarea : 6 Hydrologic Soil Group COVER DESCRIPTION A C D Acres (CN) ARID AND SEMIARID RANG Desert shrub fair 149(55) - - - Total Area (by Hydrologic Soil Group) 149 SUBAREA: 6 TOTAL DRAINAGE AREA: 149 Acres WEIGHTED CURVE NUMBER:55 TR-55 CURVE NUMBER CavIPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: _ Date: Subtitle: Pre-Construction Peak and Total Flaws Subarea : 7 Hydrologic B Soil C Croug COVER DESCRIPTION A D Acres ((N) ARID AND SEMIARID RANGELANDS Desert shrub fair 16.3(55) - - - Total Area (by Hydrologic Soil Group) 16.3 SUBAREA: 7 TOTAL DRAINAGE AREA: 16.3 Acres WEIGHTED CURVE NUMBER:55 9209139 TR-55 CURVE NUMBER MUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: _ Date: Subtitle: Pre-Construction Peak and Total Flows Subarea : 8 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 1.4(55) - - - Total Area (by Hydrologic Soil Group) 1.4 SUBAREA: 8 TOTAL DRAINAGE AREA: 1.4 Acres WEIGHTED CURVE NUMBER:55 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: _ Date: Subtitle: Pre-Construction Peak and Total Flows Subarea : 9 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RAND Desert shrub fair 22.2(55) - - - Total Area (by Hydrologic Soil Group) 22.2 SUBAREA: 9 TOTAL DRAINAGE AREA: 22.2 Acres WEIGHTED CURVE NUMBER:55 920989 TR-55 TO and Tt THRU SUBAREA MUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: Date: _ Subtitle: Pre-Construction Peak and Total Flows Subarea lA Flora Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) rnle (sa/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .013 E 0.590 Shallow Concent'd 900 .007 U 0.185 Open Channel 1400 4 0.097 Open Channel 2600 4 0.181 Time of Concentration = 1.05* Subarea lB Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 200 .025 E 0.328 Shallow Concent'd 1070 .011 U 0.176 Shallow Concent'd 520 .005 U 0.127 Open Channel 2380 4 0.165 Open Channel 900 0.063 Time of Concentration = 0.86* Subarea 2 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (br) Sheet 1.8 300 .015 E 0.557 Shallow Concent'd 720 .007 U 0.148 Shallow Concent'd 1810 .006 U 0.402 Open Channel 900 4 0.063 Time of Concentration = 1.17* Subarea 3 Flaw Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .002 E 1.246 Shallow Concent'd 700 .002 U 0.269 Open Channel 1700 4 0.118 Open Channel 1200 5 0.067 Time of Concentration = 1.70* * - Generated for use by TABULAR method 9 TR-55 To and Tt THRU SUBAREA COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: Date: _ Subtitle: Pre-Construction Peak and Total Flows Subarea 4 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .017 E 0.530 Shallow Concent'd 350 .003 U 0.110 Open Channel 700 4 0.049 Time of Concentration = 0.69* Subarea 5 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .003 E 1.060 Shallow Concent'd 750 .011 U 0.123 Time of Concentration = 1.18* Subarea 6 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) rod- (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .006 E 0.803 Shallow Concent'd 1350 .003 U 0.424 Shallow Concent'd 300 .006 U 0.067 Open Channel 1100 4 0.076 Open Channel 1450 4 0.101 Time of Concentration = 1.47* Subarea 7 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) rnl- (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 200 .035 E 0.287 Shallow Concent'd 100 .05 U 0.008 Shallow Concent'd 150 .013 U 0.023 Open Channel 150 5 0.008 Open Channel 350 5 0.019 Time of Concentration = 0.34* * - Generated for use by TABULAR method 92O989 • TR-55 Tc and Tt 'IHRU SUBAREA COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: _ Date: Subtitle: Pre-Construction Peak and Total Flows Subarea 8 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 200 .04 E 0.272 Time of Concentration = 0.27* Subarea 9 Flora Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .002 E 1.246 Shallow Concent'd 150 .002 U 0.058 Open Channel 400 4 0.028 Time of Concentration = 1.33* — Sheet Flow Surface Codes — A Smooth Surface F Grass, Dense — Shallow Concentrated — B Fallow (No Res.) G Grass, Burmuda — Surface Codes — C Cultivated < 20 % Res. H Woods, Light P Paved D Cultivated > 20 % Res. I Woods, Dense U Unpaved E Grass Range, Short * - Generated for use by TABULAR method • 920989 TR-55 TABULAR DISCHARGE METHOD VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked Subtitle: Date: Pre-Construction Peak and Total Flows Dotal watershed area: 0.### sq mi Rainfall type: II Frequency: 100 years Subareas lA 1B 2 3 4 Area(sq mi) 0.11* 0.16* 0.08* 0.12* 0.03* Rainfall(in) 3.8 3.8 3.8 3.8 3.8 Curve number 55* 55* 55* 55* 55* Runoff(in) 0.45 0.45 0.45 0.45 0.45 To (irs) 1.05* 0.86* 1.17* 1.70* 0.69* (Used) 1.00 0.75 1.25 1.50 0.75 Timerlb0utlet 0.00 0.00 0.00 0.00 0.00 Ia/P 0.43 0.43 0.43 0.43 0.43 Time Total Subarea Peak Flaw (cfs) (hr) Flow lA 1B 2 3 4 12.0 0 0 0 0 0 0 12.1 1 0 0 0 0 0 12.2 4 0 1 0 0 0 12.3 11 1 3 0 0 1 12.4 17 2 6 1 1 1 12.5 28 4 11 2 2 2 12.6 37 6 15 . 3 2 3P 12.7 47 7 17P 4 4 3 12.8 53 9 17 5 5 3 13.0 58P l0P 14 6P 7 3 13.2 57 9 11 6 8 2 13.4 54 7 9 6 9P 2 13.6 49 6 8 5 8 2 13.8 44 6 7 5 7 1 14.0 40 5 6 4 7 1 14.3 33 4 5 3 6 1 14.6 30 4 • 5 3 5 1 15.0 24 3 4 2 4 1 15.5 22 3 4 2 3 1 16.0 19 2 3 2 3 1 16.5 17 2 3 2 3 1 17.0 16 2 3 2 2 1 17.5 14 2 3 1 2 1 18.0 14 2 3 1 2 1 19.0 12 2 2 1 2 0 20.0 9 1 2 1 2 0 22.0 8 1 2 1 1 0 26.0 0 0 0 0 0 0 P - Peak Flow * - value(s) provided from TR-55 system routines 920989 TR-55 TABULAR DISCHARGE METHOD VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: Date: _ Subtitle: Pre-Construction Peak and Total Flows Continuation of subarea information Subareas 5 6 7 8 9 Area(sq mi) 0.01* 0.23* 0.03* 0.00* 0.03* Rainfall(in) 3.8 3.8 3.8 3.8 3.8 Clove number 55* 55* 55* 55* 55* Runoff(in) 0.45 0.45 0.45 0.45 0.45 Tc airs) 1.18* 1.47* 0.34* 0.27* 1.33* (Used) 1.25 1.50 0.30 0.30 1.25 TimeToOutlet 0.00 0.00 0.00 0.00 0.00 Ia/P 0.43 0.43 0.43 0.43 0.43 Time Subarea Contribution to Total Flaw (cfs) (hr) 5 6 7 8 9 12.0 0 0 0 0 0 12.1 0 0 1 0 0 12.2 0 0 3 0 0 12.3 0 1 5P 0 0 12.4 0 2 4 0 0 12.5 0 3 3 0 1 12.6 0 5 2 0 1 12.7 1P 7 2 0 2 12.8 1 9 2 0 2 13.0 1 13 1 0 3P 13.2 1 16P 1 0 3 13.4 1 16 1 0 3 13.6 1 16 1 0 2 13.8 1 14 1 0 2 14.0 1 13 1 0 2 14.3 1 11 1 0 1 14.6 1 9 1 0 1 15.0 0 8 1 0 1 15.5 0 7 1 0 1 16.0 0 6 1 0 1 16.5 0 5 0 0 1 17.0 0 5 0 0 1 17.5 0 4 0 0 1 18.0 0 4 0 0 1 19.0 0 4 0 0 1 20.0 0 3 0 0 0 22.0 0 3 0 0 0 26.0 0 0 0 0 0 P - Peak Flaw * - value(s) provided from ?R-55 system routines 920989 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: Date: _ Subtitle: Pre-Construction Peak and Total Floras Subarea : lA Hydrologic Soil Group COVER DESCRIPflCM A B C D Acres (CN) ARID AND SEMIARID REDS Desert Shrub fair 69.7(55) - - - Total Area (by Hydrologic Soil Group) 69.7 SUBAREA: lA TOTAL DRAIIh,GE AREA: 69.7 Acres WEIGHTED CURVE NUMBER:55 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: Date: _ Subtitle: Pre-Construction Peak and Total Flows Subarea : 1B Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 102(55) - - - Total Area (by Hydrologic Soil Group) 102 SUBAREA: 1B TOTAL DRAINAGE AREA: 102 Acres WEIGHTED CURVE NUMBER:55 920999 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: _ Date: Subtitle: Pre-Construction Peak and Total Flows Subarea : 2 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Dccort shrub fair 51.8(55) - - - Total Area (by Hydrologic Soil Group) 51.8 SUBAREA: 2 TOTAL DRAINAGE AREA: 51.8 Acres WEIGHTED CURVE NUMBER:55 78-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: Date: _ Subtitle: Pre-Construction Peak and Total Flows Subarea : 3 Hydrologic B Soil Group COVER DESCRIPTION A C D Acres (Cl) ARID AND SEMIARID RANGELANDS Desert shrub fair 77.8(55) - - - Total Area (by Hydrologic Soil Group) 77.8 SUBAREA: 3 TOTAL DRAINAGE AREA: 77.8 Acres WEIGHTED CURVE NUMBER:55 92O989 TR-55 CURVE NUMBER CUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: _ Date: Subtitle: Pre-Construction Peak and Total Flaws Subarea : 4 Hydrologic Soil Group COVER DESCRIPI'ICN A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 19.7(55) - - - Total Area (by Hydrologic Soil Group) 19.7 SUBAREA.: 4 TOTAL DRAINAGE AREA: 19.7 Acres WEIGHTED CURVE NU MBER:55 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: _ Date: Subtitle: Pre-Construction Peak and Total Flows Subarea : 5 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 9.4(55) - - - Total Area (by Hydrologic Soil Group) 9.4 SUBAREA: 5 TOTAL DRAINAGE AREA: 9.4 Acres WEIGHTED CURVE NUMBER:55 920989 `1R-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: Date: ____ Subtitle: Pre-Construction Peak and Total Flows Subarea : 6 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 149(55) - - - Total Area (by Hydrologic Soil Group) 149 SUBAREA: 6 TOTAL DRAINAGE AREA: 149 Acres WEIGHTED CURVE NUlBER:55 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: _ Date: Subtitle: Pre-Construction Peak and Total Flaws Subarea : 7 Hydrologic COVER DESCRIPTION A Soil C Group D Acres (IN) ARID AND SEMIARID RANGELANDS Desert shrub fair 16.3(55) - - - Total Area (by Hydrologic Soil Group) 16.3 SUBAREA: 7 TOTAL DRAINAGE AREA: 16.3 Acres WEIGHTED CURVE NUMBER:55 920989 TR-55 CURVE NUMBER CATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: Date: Subtitle: Pion Peak and Total Flows Subarea : 8 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Dczcrt Shrub fair 1.4(55) - - - Total Area (by Hydrologic Soil Group) 1.4 SUBAREA: 8 TOTAL DRAINAGE AREA: 1.4 Acres WEIGHTED CURVE NUMBER:55 TR-55 CURVE NUMBER CCL4PUPATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: _ Date: Subtitle: Pre-Construction Peak and Total Flows Subarea : 9 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Dc crt shrub fair 22.2(55) - - - Total Area (by Hydrologic Soil Group) 22.2 SUBAREA: 9 TOTAL DRAINAGE AREA: 22.2 Acres WEIGHPID CURVE NUMBER:55 920989 TR-55 To and Tt T1 J SUBAREA COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: Date: ___ Subtitle: Pre-Construction Peak and Total Flows Subarea lA Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .013 E 0.590 Shallow Cancent'd 900 .007 U 0.185 Open Channel 1400 4 0.097 Open Channel 2600 4 0.181 Time of Concentration = 1.05* Subarea lB Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) . (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 200 .025 E 0.328 Shallow Concent'd 1070 .011 U 0.176 Shallow Concent'd 520 .005 U 0.127 Open Channel 2380 4 0.165 Open Channel 900 0.063 Time of Concentration = 0.86* Subarea 2 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) rode (sq/ft) (ft) (ft/sec) (Er) Sheet 1.8 300 .015 E 0.557 Shallow Concent'd 720 .007 U 0.148 Shallow Concent'd 1810 .006 U 0.402 Open Channel 900 4 0.063 Time of Concentration = 1.17* Subarea 3 Flaw Type 2 year Length Slope Surface n Area Wp Velocity Time _ rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .002 E 1.246 Shallow Concent'd 700 .002 U 0.269 Open Channel 1700 4 0.118 Open Channel 1200 5 0.067 Time of Concentration = 1.70* * - Generated for use by TABULAR method 920989 TR-55 Tb and Tt THRU SUBAREA COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: Date: _ Subtitle: Pre-Construction Peak and Total Flows Subarea 4 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .017 E 0.530 Shallow Concent'd 350 .003 U 0.110 Open Channel 700 4 0.049 Time of Concentration = 0.69* Subarea 5 Flaw Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .003 E 1.060 Shallow Concent'd 750 .011 U 0.123 Time of Concentration = 1.18* Subarea 6 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .006 E 0.803 Shallow Concent'd 1350 .003 U 0.424 Shallow Concent'd 300 .006 U 0.067 Open Channel 1100 4 0.076 Open Channel 1450 4 0.101 Time of Concentration = 1.47* Subarea 7 Flaw Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 200 .035 E 0.287 Shallow Concent'd 100 .05 U 0.008 Shallow Concent'd 150 .013 U 0.023 Open Channel 150 5 0.008 Open Channel 350 5 0.019 Time of Concentration = 0.34* * - Generated for use by TABULAR method 920989 TR-55 Tc and Tt THRU SUBAREA COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: Date: Subtitle: Pre-Construction Peak and Total Flows Subarea 8 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) air) Sheet 1.8 200 .04 E 0.272 Time of Concentration = 0.27* Subarea 9 Flora Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .002 E 1.246 Shallow Concent'd 150 .002 U 0.058 Open Channel 400 4 0.028 Time of Concentration = 1.33* — Sheet Flow Surface Codes — A Smooth Surface F Grass, Dense — Shallow Concentrated — B Fallow (No Res.) G Grass, Burmuda — Surface Codes — C Cultivated < 20 % Res. H-Woods, Light P Paved D Cultivated > 20 % Res. I Woods, Dense U Unpaved E Grass-Range, Short * - Generated for use by TABULAR method • 92098'9 TR-55 TABULAR DISCHARGE METHOD VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: Date: _ Subtitle: Pre-Construction Peak and Total Flows Total watershed area: 0.348 sq mi Rainfall type: II Frequency: 10 years Subareas 10 11 12 13 14 15 16 17 • Area(sq mi) 0.01* 0.02* 0.12* 0.11* 0.05* 0.01* 0.01* 0.02* Rainfall(in) 2.6 2.6 2.6 2.6 2.6 2.6 2.6 2.6 Curve number 55* 55* 55* 55* 55* 55* 55* 55* Runoff(in) 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 To (hrs) 0.39* 0.07* 2.00* 1.16* 0.60* 0.03* 0.03* 0.33* (Used) 0.40 0.10 2.00 1.25 0.50 0.10 0.10 0.30 TimeIb0utlet 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Ia/P 0.63 0.63 0.63 0.63 0.63 0.63 0.63 0.63 (Used) 0.50 0.50 0.50 0.50 0.50 0.50 0.50 0.50 Time Total Subarea Contribution to Total Flora (cfs) (hr) Flaw 10 11 .12 13 14 15 16 17 12.0 0 0 0 0 0 0 0 0 0 12.1 2 0 IP 0 0 0 0 1P 0 12.2 1 0 1 0 0 0 0 0 0 12.3 0 0 0 0 0 0 0 0 0 12.4 1 0 0 0 0 1P 0 0 0 12.5 1 0 0 0 0 1 0 0 0 12.6 1 0 0 0 0 1 0 0 0 12.7 2 0 0 0 1 1 0 0 0 12.8 2 0 0 0 1 1 0 0 0 13.0 3 0 0 1P 1 1 0 0 0 13.2 4P 0 0 1 2P 1 0 0 0 13.4 3 0 0 1 2 0 0 0 0 13.6 2 0 0 1 1 0 0 0 0 13.8 2 0 0 1 1 0 0 0 0 14.0 2 0 0 1 1 0 0 0 0 14.3 2 0 0 1 1 0 0 0 0 14.6 2 0 0 1 1 0 0 0 0 15.0 2 0 0 1 1 0 0 0 0 15.5 2 0 0 1 1 0 0 0 0 16.0 2 0 0 1 1 0 0 0 0 16.5 2 0 0 1 1 0 0 0 0 17.0 2 0 0 1 1 0 0 0 0 17.5 1 0 0 1 0 0 0 0 0 18.0 1 0 0 1 0 0 0 0 0 19.0 1 0 0 1 0 0 0 0 0 20.0 0 0 0 0 0 0 0 0 0 P - Peak Flow * - value(s) provided from TR-55 system routines TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: _ Date: Subtitle: Pre-Construction Peak and Total Flows Subarea : 10 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 08.9(55) - - - Total Area (by Hydrologic Soil Group) 8.9 SUBAREA: 10 TOTAL DRAINAGE AREA: 8.9 Acres WEIGHTED CURVE NUMBER:55 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: _ Date: Subtitle: Pre-Construction Peak and Total Flows Subarea : U Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 14.7(55) - - - Total Area (by Hydrologic Soil Group) 14.7 SUBAREA: 11 TOTAL DRAINAGE AREA: 14.7 Acres WEIGHTED CURVE NUMBER:55 920989 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: _ Date: Subtitle: Pre-Construction Peak and Total Flows Subarea : 12 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Desert shrub fair 79.6(55) - - - Total Area (by Hydrologic Soil Group) 79.6 SUBAREA: 12 TOTAL DRAINAGE AREA: 79.6 Acres WEIGHTED CURVE NUMBER:55 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: _ Date: Subtitle: Pre-Construction Peak and Total F1aas Subarea : 13 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 68.7(55) - - - Total Area (by Hydrologic Soil Group) 68.7 SUBAREA: 13 TOTAL DRAINAGE AREA: 68.7 Acres WEIGHTED CURVE NUMBER:55 920989 TR-55 CURVE NUMBER COMPTTAT'I0N VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: _ Date: Subtitle: Pre-Construction Peak and Total Flows Subarea : 14 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 30(55) - - - Total Area (by Hydrologic Soil Group) 30 SUBAREA: 14 TOTAL DRAINAGE AREA: 30 Acres WEIGHTED CURVE NUMBER:55 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: _ Date: Subtitle: Pre-Construction Peak and Total Flows Subarea : 15 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Desert shrub fair 3.4(55) - - - Total Area (by Hydrologic Soil Group) 3.4 SUBAREA: 15 TOTAL DRAINAGE AREA: 3.4 Acres WEIGHTED CURVE NUMBER:55 9.4989 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: Date: Subtitle: Pre-Construction Peak and Total Flows Subarea : 16 Hydrologic Soil croup COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 6.9(55) - - - Total Area (by Hydrologic Soil Group) 6.9 SUBAREA: 16 TOTAL DRAINAGE AREA: 6.9 Acres WEIGHTED CURVE NUMBER:55 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: Date: Subtitle: Pre-Construction Peak and Total Flows Subarea : 17 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 10.4(55) - - - Total Area (by Hydrologic Soil Group) 10.4 SUBAREA: 17 TOTAL DRAINAGE AREA: 10.4 Acres WEIGHTED CURVE NUMBER:55 Mgr-55 Tic and Tt TBRU SUBAREA COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: _ Date: Subtitle: Pre-Construction Peak and Total Flows Subarea 10 Flora Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (1w) Sheet 1.8 200 .025 E 0.328 Shallow Concent'd 150 .04 U 0.013 Open Channel 280 6 0.013 Open Channel 350 3 0.032 Time of Concentration = 0.39* Subarea 11 Flow Type Length Slope Surface n Area Wp Velocity Time (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) Shallow Concent'd 250 .021 U 0.030 Open Channel 250 3 0.023 Open Channel 300 5 0.017 Time of Concentration = 0.07* Subarea 12 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .001 E 1.645 Shallow Concent'd 200 .007 U 0.041 Shallow Concent'd 600 .002 U 0.231 Open Channel 900 5 0.050 Open Channel 500 4 0.035 Time of Concentration = 2.00* Subarea 13 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) rrrip (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .01 E 0.655 Shallow Concent'd 700 .007 U 0.144 Shallow Concent'd 750 .01 U 0.129 Open Channel 770 2 0.107 Open Channel 1870 4 0.130 Time of Concentration = 1.16* * - Generated for use by TABULAR method .370989 TR-55 To and Tt THRU SUBAREA 024PC7TATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: _ Date: Subtitle: Pre-Construction Peak and Total Flows Subarea #5 - 14 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) rode (sq/ft) (ft) (ft/SeC) (hr) Sheet 1.8 300 .02 E 0.496 Shallow Concent'd 200 .01 U 0.034 Shallow Concent'd 150 .04 U 0.013 Open Channel 300 5 0.017 Open Channel 620 4.5 0.038 Time of Concentration = 0.60* Subarea 15 Flow Type Length Slope Surface n Area Wp Velocity Time (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) Open Channel 500 5 0.028 Time of Concentration = 0.03* Subarea 16 Flow Type Length Slope Surface n Area Wp Velocity Time (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) Shallow Concent'd 300 .03 U 0.030 Time of Concentration = 0.03* Subarea 17 Flora Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) rrria (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 200 .045 E 0.259 Shallow Concent'd 400 .025 U 0.044 Open Channel 300 3 0.028 Time of Concentration = 0.33* — Sheet Flow Surface Codes — A Smooth Surface F Grass, Dense — Shallow Concentrated — B Fallow (No Res.) G Grass, Burnam — Surface Codes — C Cultivated < 20 % Res. H Woods, Light P Paved D Cultivated > 20 % Res. I Woods, Dense U Unpaved E Grass-Range, Short * - Generated for use by TABULAR method 370989 TR-55 TABULAR DISCHARGE METHOD VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: _ Date: Subtitle: Pre-domstructian Peak Flaws 4btal watershed area: 0.348 mild Rainfall type: II Frequency: 100 years Subareas 10 11 12 13 14 15 16 17 Area(sq mi) 0.01* 0.02* 0.12* 0.11* 0.05* 0.01* 0.01* 0.02* Rainfall(in) 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 Curve number 55* 55* 55* 55* 55* 55* 55* 55* Runoff(in) 0.45 0.45 0.45 0.45 0.45 0.45 0.45 0.45 It (hrs) 0.39* 0.07* 2.00* 1.16* 0.60* 0.03* 0.03* 0.33* (Used) 0.40 0.10 2.00 1.25 0.50 0.10 0.10 0.30 Time'ib0utlet 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Ia/P 0.43 0.43 0.43 0.43 0.43 0.43 0.43 0.43 Time Total Subarea Contribution to 'Tbtal Flow (cfs) (hr) Flow 10 11 12 13 14 15 16 17 11.9 1 0 1 0 0 0 0 0 0 12.0 5 0 3 0 0 0 1 1 0 12.1 13 0 7P 0 0 0 2P 3P 1 12.2 12 1 4 0 0 2 1 2 2 12.3 13 2P 2 0 1 4 0 1 3P 12.4 14 2 2 0 1 6P 0 1 2 12.5 16 2 2 1 2 6 0 1 2 12.6 16 2 1 1 4 6 0 1 1 12.7 16 1 1 2 5 5 0 1 1 12.8 16 1 1 2 6 4 0 1 1 13.0 18 1 1 4 8P 3 0 0 1 13.2 20P 1 1 6 8 3 0 0 1 13.4 20 1 1 7P 8 2 0 0 1 13.6 19 1 1 7 7 2 0 0 1 13.8 17 0 1 7 6 2 0 0 1 14.0 15 0 1 7 5 2 0 0 0 14.3 13 0 1 6 5 1 0 0 0 14.6 12 0 1 6 4 1 0 0 0 15.0 10 0 1 5 3 1 0 0 0 15.5 8 0 0 4 3 1 0 0 0 16.0 8 0 0 4 3 1 0 0 0 16.5 6 0 0 3 2 1 0 0 0 17.0 6 0 0 3 2 1 0 0 0 17.5 6 0 0 3 2 1 0 0 0 18.0 5 0 0 2 2 1 0 0 0 19.0 5 0 0 2 2 1 0 0 0 20.0 5 0 0 2 2 1 0 0 0 22.0 4 0 0 2 1 1 0 0 0 P - Peak Flow * - value(s) provided from TR-55 system routines 9241989 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: _ Date: Subtitle: Pre-Construction Peak Flows Subarea : 10 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 08.9(55) - - - 'total Area (by Hydrologic Soil Group) 8.9 SUBAREA: 10 TOTAL DRAINAGE AREA: 8.9 Acres WEIGHTED CURVE NCMBER:55 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: CB Date: 01-18-92 County : Weld State: Co Checked: _ Date: Subtitle: Pre-Construction Peak Flows Subarea : 11 Hydrologic Soil Group COVER DESfRIPTICti A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Desert shrub fair 14.7(55) - - - Total Area (by Hydrologic Soil Group) 14.7 SUBAREA: 11 TOTAL DRAINAGE AREA: 14.7 Acres WEIGHTED CURVE NUMBER:55 920989 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co thedked: _ Date: Subtitle: Pre-Constriction Peak Flows Subarea : 12 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 79.6(55) - - - Total Area (by Hydrologic Soil Grasp) 79.6 SUBAREA: 12 TOTAL DRAINAGE AREA: 79.6 Acres WEIGHTED CURVE NUMBER:55 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: _ Date: Subtitle: Pre-Construction Peak Flows Subarea . 13 Hydrologic Soil Grasp COVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Desert shrub fair 68.7(55) - - - Total Area (by Hydrologic Soil Grasp) 68.7 SUBAREA: 13 TOTAL DRAINAGE AREA: 68.7 Acres WEIGHTED CURVE NUMBER:55 920989 TF-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: CO Checked: _ Date: Subtitle: Pre-Construction Peak Floras Subarea : 14 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 30(55) - - - Total Area (by Hydrologic Soil Group) 30 SUBAREA: 14 OPAL DRAINAGE AREA: 30 Acres WEIGHTED CURVE NUMBER:55 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: _ Date: Subtitle: Pre-Construction Peak Flows Subarea : 15 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Desert shrub fair 3.4(55) - - - Total Area (by Hydrologic Soil Group) 3.4 SUBAREA: 15 TOTAL DRAINAGE AREA: 3.4 Acres WEIGHTED CURVE NUMBER:55 926989 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: _ Date: Subtitle: Pre-Oonstruction Peak Flows Subarea : 16 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 6.9(55) - - - Total Area (by Hydrologic Soil Group) 6.9 SUBAREA: 16 TOTAL DRAINAGE AREA: 6.9 Acres WEIGHTED CURVE NUMBER:55 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: _ Date: Subtitle: Pion Peak Flows Subarea : 17 Hydrologic Soil Group COVER DESQUPIZCN A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Desert shrub fair 10.4(55) - - - Total Area (by Hydrologic Soil Group) 10.4 SUBAREA: 17 TOTAL DRAINAGE AREA: 10.4 Acres WEIGHTED CURVE NUMBER:55 920983 • TR-55 To and Tt IEMJ SUBAREA COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: _ Date: Subtitle: Pre-Construction Peak Flows Subarea 10 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sg/ft) (ft) (ft/sec) (hr) Sheet 1.8 200 .025 E 0.328 Shallow Concent'd 150 .04 U 0.013 Open Channel 280 6 0.013 Open Channel 350 3 0.032 Time of Concentration = 0.39* Subarea 11 Flow Type Length Slope Surface n Area Wp Velocity Time (ft) (ft/ft) rrde (sg/ft) (ft) (ft/sec) (hr) Shallow Concent'd 250 .021 U 0.030 Open Channel 250 3 0.023 Open Channel 300 5 0.017 Time of Concentration = 0.07* Subarea 12 Flow Type t year Length Slope Surface Area Wp Velocity Time rain (ft/ n ft) code (sg/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .001 E 1.645 Shallow Concent'd 200 .007 U 0.041 Shallow Concent'd 600 .002 U 0.231 Open Channel 900 5 0.050 Open Channel 500 4 0.035 Time of Concentration = 2.00* Subarea 13 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sg/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .01 E 0.655 Shallow Concent'd 700 .007 U 0.144 Shallow Concent'd 750 .01 U 0.129 Open Channel 770 2 0.107 Open Channel 1870 4 0.130 Time of Concentration = 1.16* * - Generated for use by TABULAR method 92O989 7.8-55 To and Tt THRU SUBAREA COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-18-92 County : Weld State: Co Checked: ___ Date: Subtitle: Pre-Construction Peak Flows Subarea 14 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sg/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .02 E 0.496 Shallow COncent'd 200 .01 U 0.034 Shallow Concent'd 150 .04 U 0.013 Open channel 300 5 0.017 Open Channel 620 4.5 0.038 Time of Concentration = 0.60* Subarea 15 Flow Type Length Slope Surface n Area Wp Velocity Time (ft) (ft/ft) code (sg/ft) (ft) (ft/sec) (hr) Open Channel 500 5 0.028 Time of Concentration = 0.03* Subarea 16 Flow Type Length Slope Surface n Area Wp Velocity Time (ft) (ft/ft) code (s4/ft) (ft) (ft/sec) (hr) Shallow Concent'd 300 .03 U 0.030 Time of Concentration = 0.03* Subarea 17 Flora Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sg/ft) (ft) (ft/sec) (hr) Sheet 1.8 200 .045 E 0.259 Shallow Concent'd 400 .025 U 0.044 Open Channel 300 3 0.028 Time of Concentration = 0.33* — Sheet Flow Surface Codes — A Smooth Surface F Grass, Dense — Shallow Concentrated — B Fallow (No Res.) G Grass, Burma — Surface rndes — C Cultivated < 20 % Res. H Woods, Light P Paved D Cultivated > 20 % Res. I Woods, Dense U Unpaved E Crass Range, Short * - Generated for use by TABULAR method 90989 -55 TABULAR DISCHARGE METHOD VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak and Total Flaws Drainage Area I 'Dotal watershed area: 1.038 sq mi Rainfall type: II Frequency: 100 years Subareas 1 I Area(sq mi) 0.27* 0.77* Rainfall(in) 3.8 3.8 curve number 55* 63* Runoff(in) 0.45 0.81 TO (hrs) 1.05 0.99 (Used) 1.00 1.00 Time abaft-let 0.99 0.00 (Used) 1.00 0.00 Ia/P 0.43 0.31 Time Total Subarea Contribution to Total Flow (cfs) (hr) Flow 1 I 12.1 2 0 2 12.2 9 0 9 12.3 25 0 25 12.4 50 0 50 12.5 83 0 83 12.6 118 0 118 12.7 148 0 148 12.8 165 0 165 13.0 179P 1 178P 13.2 144 4 140 13.4 119 9 110 13.6 104 15 89 13.8 92 19 73 14.0 82 21P 61 14.3 68 19 49 14.6 58 16 42 15.0 47 12 35 15.5 39 9 30 16.0 35 8 27 16.5 31 7 24 17.0 28 6 22 17.5 25 5 20 18.0 24 5 19 19.0 21 4 17 20.0 19 4 15 22.0 15 3 12 26.0 1 1 0 P - Peak Flow * - value(s) provided from TR-55 system routines 920963 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO) Checked: Date: Subtitle: Pre-Construction Peak and Total Flows Drainage Area I Subarea : 1 Hydrologic Soil Group COVER DESC2IPUICJ A B C D Acres (CN) ARID AND SEMIARID RAC Desert shrub fair 172(55) - - - Total Area (by Hydrologic Soil Group) 172 SUBAREA: 1 TOTAL DRAINAGE AREA: 172 Acres WEIGHTED CURVE NUMBER:55 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill itcar: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre ctiou Peak and Total Floras Drainage Area I Subarea : I Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 274(55) 218(72) - - Total Area (by Hydrologic Soil Group) 274 218 SUBAREA: I TOTAL DRAINAGE AREA: 492 Acres WEIG I D CURVE NUMBER:63 9 ,0989 TR-55 TABULAR DISCHARGE METHOD VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: _ Date: Subtitle: Pre-fiction Peak Flows Drainage Areas II, III and BE-1 Total watershed area: 6.207 sq mi Rainfall type: II Frequency: 100 years Subareas 2 II 3 III BE-1 Area(sq mi) 0.08* 0.70* 0.12* 0.29* 5.02* Rainfall(in) 3.8 3.8 3.8 3.8 3.8 Curve number 55* 55* 55* 55* 55* Runoff(in) 0.45 0.45 0.45 0.45 0.45 TC (hrs) 1.17 0.44 1.70 0.48 2.67* (Used) 1.25 0.40 1.50 0.50 0.30 TimeToOutlet 0.62 0.19 0.66 0.19 0.00 (Used) 0.50 0.20 0.75 0.20 0.20 Ia/P 0.43 0.43 0.43 0.43 0.43 Time natal Subarea Contribution to Total Flow (cfs) (hr) Flow 2 II 3 III BE-1 12.0 5 0 0 0 0 5 12.1 27 0 2 0 0 25 12.2 131 0 7 0 1 123 12.3 390 0 24 0 5 361 12.4 694 0 54 0 13 627 12.5 820P 0 80 0 23 717P 12.6 780 0 91P 0 31 658 12.7 681 0 86 0 34P 561 12.8 578 1 76 0 33 468 13.0 415 2 55 1 26 331 13.2 328 4 42 3 20 259 13.4 279 5 34 4 16 220 13.6 249 6P 29 6 13 195 13.8 230 6 26 7 12 179 14.0 213 5 24 8P 10 166 14.3 191 5 21 8 9 148 14.6 170 4 19 7 8 132 15.0 156 3 17 6 7 123 15.5 144 3 16 4 7 114 16.0 131 2 15 4 6 104 16.5 117 2 13 3 6 93 17.0 111 2 12 3 5 89 17.5 106 2 12 3 5 84 18.0 101 1 11 2 5 82 19.0 90 1 10 2 4 73 20.0 80 1 9 2 4 64 22.0 70 1 8 1 3 57 P - Peak Flaw * - value(s) provided from TR-55 system routines 920989 78-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak Flows Drainage Areas II, III and BE-1 Subarea : 2 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 51.8(55) - - - Total Area (by Hydrologic Soil Group) 51.8 SUBAREA: 2 TOTAL DRAINAGE AREA: 51.8 Acres WEIGHTED CURVE NUMBER:55 TR-55 CURVE NUMBER CCMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak Flaws Drainage Areas II,III and BE-1 Subarea : II Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Desert shrub fair 448(55) - - - Total Area (by Hydrologic Soil Group) 448 SUBAREA: II TOTAL DRAINAGE AREA: 448 Acres WEIGHTED CURVE NUMBER:55 92O989 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked' Date: Subtitle: Pre-Construction Peak Flows Drainage Areas II, III and BE-1 Subarea : 3 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 77.8(55) - - - Total Area (by Hydrologic Soil Group) 77.8 SUBAREA: 3 TOTAL DRAINAGE AREA: 77.8 Acres WEIGHTED CURVE NUMBER:55 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak Flows Drainage Areas II,III and BE-1 Subarea : III Hydrologic Soil Group AVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Desert shrub fair 184(55) - - - Total Area (by Hydrologic Soil Group) 184 SUBAREA: III TOTAL DRAINAGE AREA: 184 Acres WEIGHTED CURVE NUMBER:55 320989 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: pre-construction Peak Flows Drainage Areas II, III and BE-1 Subarea : BE-1 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Desert shrub fair 3211(55) - - - Total Area (by Hydrologic Soil Group) 3211 SUBAREA: BE-1 TOTAL DRAINAGE AREA: 3211 Acres WEIGHTED CURVE NUMBER:55 TR-55 Tc and Tt THRU SUBAREA COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak Flows Drainage Areas II,III and BE-1 Subarea #5 - BE-1 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (s4/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 0.1 E 0.261 Shallow Concent'd 1000 .013 U 0.151 Open Channel 5000 4 0.347 Open Channel 20600 3 1.907 Time of Concentration = 2.67* — Sheet Flow Surface rrr3Pc — A Smooth Surface F Grass, Dense — Shallow Concentrated — B Fallow (No Res.) G Grass, Bur mida — Surface Codes — C Cultivated < 20 % Rz. H We s, Light P Paved D Cultivated > 20 % Res. I Woods, Dense U Unpaved E Grass Range, Short * - Generated for use by TABULAR method 920989 TR-55 TABULAR DISCHARGE METHOD VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak Flows Drainage Areas IV, VI, VII and VIII Total watershed area: 0.517 sq mi Rainfall type: II Frequency: 100 years Subareas 4 IV 6 VI 7 VII 8 VIII Area(sq mi.) 0.03* 0.07* 0.23* 0.04* 0.03* 0.06* 0.00* 0.05* Rainfall(in) 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 Curve number 55* 55* 55* 55* 55* 55* 55* 55* Runoff(in) 0.45 0:45 0.45 0.45 0.45 0.45 0.45 0.45 Td (ht's) 0.69 0.13 1.47 0.17 0.34 0.19 0.27 0.15 (Used) 0.75 0.10 1.50 0.20 0.30 0.20 0.30 0.20 TimeToOutlet 0.12 0.00 0.16 0.00 0.18 0.00 0.14 0.00 (Used) 0.10 0.00 0.10 0.00 0.20 0.00 0.10 0.00 Ia/P 0.43 0.43 0.43 0.43 0.43 0.43 0.43 0.43 Time Total Subarea Contribution to Total Flaw (cfs) (hr) Flow 4 IV 6 VI 7 VII 8 VIII 11.9 2 0 2 0 0 0 0 0 0 12.0 12 0 7 0 1 0 2 0 2 12.1 39 0 21P 0 5 0 7 0 6 12.2 49P 0 13 0 10P 1 14P 0 11P 12.3 36 0 6 0 8 2 11 0 9 12.4 27 0 5 1 5 3 7 0 6 12.5 25 1 5 2 4 4P 5 0 4 12.6 23 2 4 3 3 3 4 0 4 12.7 23 2 3 5 3 3 4 0 3 12.8 23 3P 3 7 2 2 3 0 3 13.0 26 3 3 11 2 2 3 0 2 13.2 28 3 3 15 2 1 2 0 2 13.4 28 2 2 17P 2 1 2 0 2 13.6 27 2 2 16 2 1 2 0 2 13.8 24 1 2 15 1 1 2 0 2 14.0 21 1 2 13 1 1 2 0 1 14.3 19 1 2 11 1 1 2 0 1 14.6 18 1 2 10 1 1 2 0 1 15.0 15 1 2 8 1 1 1 0 1 15.5 13 1 1 7 1 1 1 0 1 16.0 12 1 1 6 1 1 1 0 1 16.5 10 1 1 5 1 0 1 0 1 17.0 10 1 1 5 1 0 1 0 1 17.5 9 1 1 4 1 0 1 0 1 18.0 9 1 1 4 1 0 1 0 1 19.0 8 0 1 4 1 0 1 0 1 20.0 7 0 1 3 1 0 1 0 1 P - Peak Flaw * - value(s) provided from TR-55 system routines 920989 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak Flaws Drainage Areas IV, VI, VII and VIII Subarea : 4 Hydrologic Soil Group COVER DESCRIPTION A D Acres (CN) ARID AND SEMIARID RANGE[ANDS Desert shrub fair 19.7(55) - - - Total Area (by Hydrologic Soil Group) 19.7 SUBAREA: 4 TOTAL DRAINAGE AREA: 19.7 Acres WEIGHTED CURVE NUMBER:55 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak Flows Drainage Areas IV, VI, VII and VIII Subarea : IV Hydrologic Soil Group COVER DESCRIITICN A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 43.2(55) - - - Total Area (by Hydrologic Soil Group) 43.2 SUBAREA: IV TOTAL DRAINAGE AREA: 43.2 Acres WEIGHTED CURVE NUMBER:55 920989 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak Flows Drainage Areas IV, VI, VII and VIII Subarea : 6 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANCTIANDS Desert shrub fair 149(55) - - - Total Area (by Hydrologic Soil Group) 149 SUBAREA: 6 TOTAL DRAINAGE AREA: 149 Acres WEIGHTED CURVE NUMBER:55 . TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Ccnstruction Peak Flows Drainage Areas IV,VI, VII and VIII Subarea : VI Hydrologic Soil Group CLOVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 28.5(55) - - - Total Area (by Hydrologic Soil Graff) 28.5 SUBAREA: VI TOTAL DRAINAGE AREA: 28.5 Acres WEIGHTED CURVE NUMBER:55 920959 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak Flows Drainage Areas IV, VI, VII and VIII Subarea : 7 Hydrologic Soil Group OVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 16.3(55) - - - Tbtal Area (by Hydrologic Soil Group) 16.3 SUBAREA: 7 TOTAL DRAINAGE AREA: 16.3 Acres WEIGHTED CURVE NUMBER:55 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak Floras Drainage Areas IV,VI, VII and VIII Subarea : VII Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 39.5(55) - - - Total Area (by Hydrologic Soil Group) 39.5 SUBAREA: VII TOTAL DRAINAGE AREA: 39.5 Acres WEIGHTED CURVE NUMBER:55 920989 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak Flows Drainage Areas IV, VI, VII and VIII Subarea : 8 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 1.4(55) - - - Total Area (by Hydrologic Soil Group) 1.4 SUBAREA: 8 ¶IVThL DRAINAGE AREA: 1.4 Acres WEIGHTED CURVE NUMBER:55 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak Flows Drainage Areas IV, VI, VII and VIII Subarea : VIII Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Desert shrub fair 33.1(55) - - - Total Area (by Hydrologic Soil Group) 33.1 SUBAREA: VIII TOTAL DRAINAGE AREA: 33.1 Acres WEIGHT CURVE NUMBER:55 920989 TR-55 TABULAR DISCHARGE METHOD VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak Flows Drainage Area ED-1 Total watershed area: 1.542 sq mi Rainfall type: II Frequency: 100 years Subareas 9 IX 10 X 12 XII ED-1A ED--1 Area(sq mi) 0.03* 0.21* 0.01* 0.12* 0.12* 0.32* 0.42* 0.29* Rainfall(in) 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 Curve number 55* 55* 55* 55* 55* 55* 55* 55* Runoff(in) 0.45 0.45 0.45 0.45 0.45 0.45 0.45 0.45 To (hrs) 1.33 0.34 0.39 0.26 2.00 0.39 1.28* 0.54 (Used) 1.25 0.40 0.40 0.30 2.00 0.40 1.25 0.50 TimeT0Outlet 0.84 0.53 0.78 0.53 0.91 0.53 0.53 0.00 (Used) 1.00 0.50 0.75 0.50 1.00 0.50 0.50 0.00 Ia/P 0.43 0.43 0.43 0.43 0.43 0.43 0.43 0.43 Time Total Subarea Contribution to Total Flow (cfs) (hr) Flow 9 IX 10 X 12 XII ED-IA ED-1 12.1 3 0 0 0 0 0 0 0 3 12.2 9 0 0 0 0 0 0 0 9 12.3 22 0 0 0 0 0 0 0 22 12.4 39 0 1 0 2 0 2 0 34 12.5 56 0 5 0 6 0 7 0 38P 12.6 74 0 10 0 10 0 16 1 37 12.7 90 0 17 0 14 0 26 2 31 12.8 102 0 22 1P 15P 0 34 4 26 13.0 105P 0 24P 1 13 0 37P 11 19 13.2 97 0 20 1 10 0 30 20 16 13.4 89 1 15 1 7 1 23 28 13 13.6 83 1 12 1 6 2 18 31P 12 13.8 77 2P 10 1 5 3 15 31 10 14.0 72 2 8 1 5 4 13 29 10 14.3 64 2 7 1 4 6 11 24 9 14.6 57 2 6 0 4 7P 10 20 8 15.0 50 2 6 0 3 7 9 16 7 15.5 43 1 5 0 3 6 8 13 7 16.0 38 1 5 0 3 5 7 11 6 16.5 33 1 4 0 2 4 7 10 5 17.0 31 1 4 0 2 4 6 9 5 17.5 29 1 4 0 2 3 6 8 5 18.0 28 1 4 0 2 3 5 8 5 19.0 24 1 3 0 2 2 5 7 4 20.0 22 1 3 0 2 2 4 6 4 22.0 17 0 2 0 1 2 4 5 3 26.0 2 0 0 0 0 1 0 1 0 P - Peak Flow * - value(s) provided from TR-55 system routines 920983 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre--Construction peak Flaws Drainage Area ED-1 Subarea : 9 COVER DESCRIPTION A Hydrologic Bogic Soil C Group D Acres (CN) ARID AND SEMIARID RANGELANDS Desert.Shrub fair 22.2(55) - - - Total Area (by Hydrologic Soil Group) 22.2 SUBAREA: 9 TOTAL DRAINAGE AREA: 22.2 Acres WEIGHTED CURVE NUMBER:55 TR-55 CURVE NUMBER MUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak Flows Drainage Area ED-1 Subarea : •IX Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Desert shrub fair 135(55) - - - Tbtal Area (by Hydrologic Soil Group) 135 SUBAREA: IX TOTAL DRAINAGE AREA: 135 Acres WEIGHTED CURVE NUMBER:55 920989 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak Flows Drainage Area ED-1 Subarea : 10 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 8.9(55) - - - Total Area (by Hydrologic Soil Group) 8.9 SUBAREA: 10 TOTAL DRAINAGE AREA: 8.9 Acres WEIGHTED CURVE NUMBER:55 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak Flows Drainage Area ED-1 Subarea : X Hydrologic Soil Croup COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 79.0(55) - - - Total Area (by Hydrologic Soil Group) 79 SUBAREA: X TOTAL DRAINAGE AREA: 79 Acres WEIGHTED CURVE NUMBER:55 920989 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre Construction Peak Flows Drainage ge Area 1 Subarea : 12 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 79.6(55) - - - Total Area (by Hydrologic Soil Group) 79.6 SUBAREA: 12 TOTAL DRAINAGE AREA: 79.6 Acres WEIGHTED CURVE NUMBER:55 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak Flows Drainage Area ED-1 Subarea : XII Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 208(55) - - - Total Area (by Hydrologic Soil Group) 208 SUBAREA: XII TOTAL DRAINAGE AREA: 208 Acres WEIGHTED CURVE NUMBER:55 920989 TR-55 CURVE NUMBER OCMPUTATTom VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Constructian Peak Flows Drainage Area ED-1 tiubarea : ED-1A COVER DESCRIPTION A HydroBogic So Cil Group D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 269(55) - - - Total Area (by Hydrologic Soil Group) 269 SUBAREA: ED-1A TOTAL DRAINAGE AREA: 269 Acres WEIGHTED CURVE NUMBER:55 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: won Peak Flows Drainage Area ED-1 Subarea : ED-1 COVER DESCRIPTION A A . HydroBogic Soil C Group D Acres (IN) ARID AND SEMIARID RANGELANDS Desert shrub fair 185(55) - - - Tatal Area (by Hydrologic Soil Crotp) 185 SUBAREA: FD-1 TOTAL DRAINAGE AREA: 185 Acres WEI(HU'ID CURVE NUMBER:55 920989 TR-55 To and Tt THRU SUBAREA COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Chedced• Date: Subtitle: Pre-Construction Peak Flows Drainage Area ED-1 Subarea #7 - ED-IA Flow Type 2 roar Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sg/ft) (ft) (ft/Sec) (hr) Sheet 1.8 300 .007 E 0.755 Shallow Concent'd 900 .014 U 0.131 Open Channel 2300 4.2 0.152 Open Channel 3500 4 0.243 Time of Concentration = 1.28* — Sheet Flow Surface Codes — A Smooth Surface F Grass, Dense — Shallow Concentrated — B Fallow (No Ras.) G Grass, Burmuda — Surface Codes — C Cultivated < 20 % Res. H Woods, Light P Paved D Cultivated > 20 % Res. I Woods, Dense U Unpaved E Grass Range, Short * - Generated for use by TABULAR method 920989 • TR-55 TABULAR DISCHARGE NOD VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak Flows Drainage Areas B13, B14 and ED-2 Total watershed area: 2.316 sq mi Rainfall type: II Frequency: 100 years Subareas 13 XIII 15 XV B13 Area(sq mi) 0.11* 0.02* 0.01* 0.21* 0.94* Rainfall(in) 3.8 3.8 3.8 3.8 3.8 Glarus number 55* 55* 55* 55* 55* Runoff(in) 0.45 0.45 0.45 0.45 0.45 To (hrs) 1.16 0.08 0.03 0.41 1.19* (Used) 1.00 0.10 0.10 0.50 1.25 TimeTtCutlet 1.35 1.27 1.27 0.88 0.30 (Used) 1.50 1.00 1.00 0.75 0.20 Ia/P 0.43 0.43 0.43 0.43 0.43 Time Total Subarea Contribution to Total Flow (cfs) (hr) Flow 13 XIII 15 XV B13 12.1 0 0 0 0 0 0 12.2 2 0 0 0 0 0 12.3 10 0 0 0 0 0 12.4 28 0 0 0 0 3 12.5 56 0 0 0 1 6 12.6 93 0 0 0 3 13 12.7 127 0 1 0 6 22 12.8 154 0 2P 0 10 33 13.0 175P 0 2 1P 17 55 13.2 174 0 2 1 20P 70 13.4 160 1 2 0 19 73P 13.6 142 2 1 0 16 68 13.8 124 3 1 0 13 60 14.0 111 5 1 0 10 53 14.3 97 8P 1 0 8 44 14.6 85 8 1 0 7 38 15.0 73 6 1 0 6 32 15.5 62 5 1 0 5 26 16.0 55 4 0 0 5 23 16.5 49 3 0 0 4 21 17.0 45 3 0 0 4 19 17.5 42 2 0 0 4 18 18.0 40 2 0 0 4 17 19.0 36 2 0 0 3 15 20.0 33 2 0 0 3 14 22.0 26 1 0 0 2 11 26.0 2 1 0 0 0 1 P - Peak Flaw * - value(s) provided fran TR-55 system routines 920989 TR-55 TABULAR DISCHARGE NFUCD VEPSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak Flows Drainage Areas B13, B14 and ED-2 Continuation of subarea information Subareas 14 XIV B14 ED-2 Area(sq mi) 0.05* 0.08* 0.52* 0.38* Rainfall(in) 3.8 3.8 3.8 3.8 Curve number 55* 55* 55* 55* Runoff(in) 0.45 0.45 0.45 0.45 Tc (hrs) 0.60 0.11 0.48 0.86* (Used) 0.50 0.10 0.50 0.75 TimeTdOutlet 0.88 0.77 0.30 0.00 (Used) 1.00 0.75 0.30 0.00 Ia/P 0.43 0.43 0.43 0.43 Time Subarea Contribution to Total Flow (cfs) (hr) 14 XIV B14 ED-2 12.1 0 0 0 0 12.2 0 0 0 2 12.3 0 1 2 7 12.4 0 3 6 16 12.5 0 5 18 26 12.6 0 8 34 35 12.7 0 9 49 40 12.8 0 10P 58P 41P 13.0 1 9 56 34 13.2 3 7 44 27 13.4 4P 5 34 22 13.6 4 4 28 19 13.8 4 3 23 17 14.0 3 3 21 15 14.3 2 3 18 13 14.6 2 2 16 11 15.0 2 2 14 10 15.5 1 2 13 9 16.0 1 2 12 8 16.5 1 2 10 8 17.0 1 1 10 7 17.5 1 1 9 7 18.0 1 1 9 6 19.0 1 1 8 6 20.0 1 1 7 5 22.0 1 1 6 4 26.0 0 0 0 0 P - Peak Flow * - value(s) provided from 28-55 system routines 320389 TR-55 CURVE NUMBER COMPUTATIQJ VERSION 1.11 Project : E. Weld Sanitary Landfill LLcnr: GB Date:County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak Flows Drainage Areas B13, B14 and ED-2 Subarea : 13 Hydrologic Soil Group COVER DE.SCRIPTICN A B C D Awes (CVO ARID AND SEMIARID RANGELANDS Desert shrub fair 68.7(55) - - - Total Area (by Hydrologic Soil Grasp) 68.7 SUBAREA: 13 TOTAL DRAINAGE AREA: 68.7 Acres WEIGHTED CURVE NUMBER:55 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 Canty : Weld State: CO Checked: Date: Subtitle: Pre-nstruction Peak Flows Drainage Areas B13,B14 and ED-2 Subarea : XIII Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 12.9(55) - - - Total Area (by Hydrologic Soil Group) 12.9 SUBAREA: XIII TOTAL DRAINAGE AREA.: 12.9 Acres WEIGHTED CURVE NUMBER:55 9213989 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak Flows Drainage Areas B13, B14 and ED-2 Subarea : 15 Hydrologic Soil Group COVER DESCRIPTION A D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 3.4(55) - - - Tbtal Area (by Hydrologic Soil Group) 3.4 SUBAREA: 15 TOTAL DRAINAGE AREA: 3.4 Acres WEIGHTED CURVE NUMBER:55 28-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak Flows Drainage Areas B13,B14 and ED-2 Subarea : XV Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 133(55) - - - Total Area (by Hydrologic Soil Group) 133 SUBAREA: XV TOTAL DRAINAGE AREA: 133 Acres WEIGHTED CURVE NUIBER:55 920999 'II2-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak Flows Drainage Areas B13, B14 and ED-2 Subarea : B13 COVER DESCRIPTION A HydroBogic Soil C Grog D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 604(55) - - - Tbtal Area (by Hydrologic Soil Group) 604 SUBAREA: B13 TC1LAL DRAINAGE AREA: 604 Acres WEIGHTED CURVE NUMBER:55 78-55 CURVE NUMBER OOMPUUATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak Flans Drainage Areas 813,B14 and ED-2 Subarea : 14 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Desert shrub fair 30(55) - - - Total Area (by Hydrologic Soil Group) 30 SUBAREA: 14 TOTAL DRAINAGE AREA: 30 Acres WEIGHTED CURVE NUMBER:55 • TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak Flows Drainage Areas B13, B14 and ED-2 Subarea : XIV Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RAC Desert shrub fair 51.4(55) - - - Total Area (by Hydrologic Soil Group) 51.4 SUBAREA: XIV TOTAL DRAINAGE AREA: 51.4 Acres WEIGHTED CURVE NUMBER:55 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak Flows Drainage Areas B13, B14 and ED-2 Subarea : B14 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 335(55) - - - Total Area (by Hydrologic Soil Group) 335 SUBAREA: B14 TOTAL DRAINAGE AREA: 335 Acres WEIGHTED CURVE NUMBER:55 92,0333 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak Flaws Drainage Areas B13, B14 and ED-2 Subarea : ED-2 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 244(55) - - - Total Area (by Hydrologic Soil Group) 244 SUBAREA: ED-2 TOTAL DRAINAGE AREA: 244 Acres WEIGHTED CURVE NUMBER:55 920959 TR-55 Tc and Tt TBRU SUBAREA COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill Ttaar: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak Flows Drainage Areas B13, B14 and ED-2 Subarea B13 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (saJft) (ft) (ft/sec) (hr) Sheet 1.8 300 .03 E 0.422 Shallow Concent'd 1050 .017 U 0.139 Open Charnel 600 5 0.033 Open Channel 8600 4 0.597 Time of Concentration = 1.19* Subarea ED-2 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sg/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .1 E 0.261 Shallow Concent'd 1600 .006 U 0.356 Open Charnel 2700 5 0.150 Open Channel 1300 4 0.090 Time of Concentration = 0.86* — Sheet Flow Surface Codes — A Smooth Surface F Gass, Dense — Shallow Concentrated — B Fallow (No Res.) G Grass, Burmuda — Surface Codes — C Cultivated < 20 % Res. H Woods, Light P Paved D Cultivated > 20 % Res. I Woods, Dense U Unpaved E Crass-Range, Short * - Generated for use by TABULAR method 920989 TR-55 TABULAR DISCHARGE METHOD VERSION 1.11 Project : East Weld Sanitary Landfill User: GB Date: 01-24-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak Flows Drainage Basins 16, 17 and ED-2 natal watershed area: 0.721 sq mi Rainfall type: II Frequency: 100 years Subareas 16 XVI 17 XVII B17 Area(sq mi) 0.01* 0.08* 0.02* 0.17* 0.44* Rainfall(in) 3.8 3.8 3.8 3.8 3.8 Cave number 55* 55* 55* 55* 55* Runoff(in) 0.45 0.45 0.45 0.45 0.45 TO (hrs) 0.03 0.17 0.33 0.36 0.86* (Used) 0.10 0.20 0.30 0.40 0.75 TimeTOOuutlet 0.48 0.32 0.67 0.32 0.00 (Used) 0.40 0.30 0.75 0.30 0.00 Ia/P 0.43 0.43 0.43 0.43 0.43 Time Total Subarea Contribution to Total Flaw (cfs) (hr) Flow 16 XVI 17 XVII B17 12.1 0 0 0 0 0 0 12.2 4 0 2 0 0 2 12.3 16 1 6 0 1 8 12.4 35 1 11 0 5 18 12.5 55 2P 12P 0 11 30 12.6 71 2 11 1 17 40 12.7 77 1 9 1 21P 45 12.8 78P 1 8 1 21 47P 13.0 64 1 5 2P 17 39 13.2 51 1 4 2 13 31 13.4 41 0 4 1 10 26 13.6 34 0 3 1 8 22 13.8 30 0 3 1 7 19 14.0 27 0 3 1 6 17 14.3 24 0 2 1 6 15 14.6 21 0 2 1 5 13 15.0 18 0 2 0 5 11 15.5 16 0 2 0 4 10 16.0 16 0 2 0 4 10 16.5 14 0 2 0 3 9 17.0 12 0 1 0 3 8 17.5 12 0 1 0 3 8 18.0 11 0 1 0 3 7 19.0 11 0 1 0 3 7 20.0 9 0 1 0 2 6 22.0 8 0 1 0 2 5 26.0 0 0 0 0 0 0 P - Peak Flow * - value(s) provided from TR-55 system routines 920989 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : East Weld Sanitary Landfill User: GB Date: 01-24-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak Flows Drainage Basins 16, 17 and ED-2 Subarea : 16 Hydrologic Soil Group COVER DESCRIPTION A D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 6.9(55) - - - Total Area (by Hydrologic Soil Group) 6.9 SUBAREA: 16 TOTAL DRAINAGE AREA: 6.9 Acres WEIGHTED CURVE NUMBER:55 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : Fast Weld Sanitary Landfill User: GB Date: 01-24-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Ccnstruction Peak Flows Drainage Basins 16, and ED-2 Subarea : XVI Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Desert shrub fair 52.3(55) - - - Tbtal Area (by Hydrologic Soil Group) 52.3 SUBAREA: XVI TOTAL DRAINAGE AREA: 52.3 Acres WEIGHTED CURVE NUMBER:55 920959 • TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : East Weld Sanitary Landfill User: GB Date: 01-24-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak Flows Drainage Basins 16, 17 and ED-2 Subarea : 17 Hydrologic Soil Group COVER DESCRIPTION A D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 10.4(55) - - - Total Area (by Hydrologic Soil Group) 10.4 SUBAREA: 17 TOTAL DRAINAGE AREA: 10.4 Acres WEIGHTED CURVE NUMBER:55 TR-55 CURVE NUMBER CCMPUTATION VERSION 1.11 Project : East Weld Sanitary Landfill User: GB Date: 01-24-92 County : Weld State: CO checked: Date: Subtitle: Pre-Construction Peak Flows Drainage Basins 16, and ED-2 Subarea : XVII Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 112(55) - - - Total Area (by Hydrologic Soil Group) 112 SUBAREA: XVII TOTAL DRAINAGE AREA: 112 Acres WEIGHTED CURVE NUMBER:55 920989 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : Fast Weld Sanitary Landfill User: GB Date: 01-24-92 County : Weld State: CO Checked: Date: Subtitle: Pre-Construction Peak Floras Drainage Basins 16, 17 and ED-2 Subarea : 817 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (GN) ARID AND SEMIARID RANGELANDS Desert shrub fair 280(55) - - - Total Area (by Hydrologic Soil Group) 280 SUBAREA: B17 TOTAL DRAINAGE AREA: 280 Acres WEIGHTED CURVE NUMBER:55 920989 TR-55 TC and Tt THRU SUBAREA MUTATION VERSION 1.11 Project : Fast Weld Sanitary Landfill User: GB Date: 01-24-92 County : Weld State: CO Checked: Date: Subtitle: Pre--Construction Peak Flows Drainage Basins 16, 17 and ED-2 Subarea B17 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) rule (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .06 E 0.320 Shallow Concent'd 850 .012 U 0.134 Open Channel 1400 5.5 0.071 Open Channel 6100 5 0.339 Time of Concentration = 0.86* — Sheet Flow Surface Codes — A Smooth Surface F Grass, Dense — Shallow Concentrated — B Fallow (No Res.) G Grass, Burmuda — Surface C hdPs — C Cultivated < 20 % Res. H Woods, Light P Paved D Cultivated > 20 % Res. I Woods, Dense U Unpaved E Grass Range, Short * - Generated for use by TABULAR method 920989 28-55 TABULAR DISCHARGE METHOD VERSION 1.11 Project : Fast Weld Sanitary Landfill User: GB Date: 01-24-92 County : Weld State: CO Checked: _ Date: Subtitle: Pre-Construction Flows Drainage Area XVIII Total watershed area: 1.058 sq mi Rainfall type: II Frequency: 100 years Subareas 18 XVIII Area(sq mi) 0.04* 1.02* Rainfall(in) 3.8 3.8 Curve number 55* 55* Runoff(in) 0.45 0.45 Id (hrs) 0.66* 2.12* (Used) 0.50 0.30 TimeTtCutlet 1.25 0.00 (Used) 1.50 0.20 Ia/P 0.43 0.43 Time natal Subarea Contribution to Total Flow (cfs) (hr) Flora 18 XVIII 12.0 1 0 1 12.1 5 0 5 12.2 25 0 25 12.3 74 0 74 12.4 128 0 128 12.5 146P 0 146P 12.6 134 0 134 12.7 114 0 114 12.8 95 0 95 13.0 68 0 68 13.2 53 0 53 13.4 46 1 45 13.6 42 2 40 13.8 40 3P 37 14.0 37 3 34 14.3 33 3 30 14.6 29 2 27 15.0 27 2 25 15.5 24 1 23 16.0 22 1 21 16.5 20 1 19 17.0 19 1 18 17.5 18 1 17 18.0 18 1 17 19.0 16 1 15 20.0 14 1 13 22.0 12 0 12 P - Peak Flaw * - value(s) provided from TR-55 system routines 920989 TR-55 CURVE NUMBER CCMPUTATION VERSION 1.11 Project : East Weld Sanitary Landfill User: GB Date: 01-24-92 County : Weld State: CO Checked: _ Date: Subtitle: Pre-Construction Floras Drainage Area XVIII Subarea : 18 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 23.4(55) - - Total Area (by Hydrologic Soil Group) 23.4 SUBAREA: 18 TOTAL DRAINAGE AREA: 23.4 Acres WEIGHTED CURVE NUMBER:55 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : East Weld Sanitary Landfill User: GB Date: 01-24-92 County : Weld State: CO Checked: _ Date: Subtitle: Pre-Construction Flows Drainage Area XVIII Subarea : XVIII Hydrologic Soil Group DOVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Desert shrub fair 654(55) - - - Total Area (by Hydrologic Soil Group) 654 SUBAREA: XVIII TOTAL DRAINAGE AREA: 654 Acres WEIGHTED CURVE NUMBER:55 TR-55 Tc and Tt THRU SUBAREA COMPUTATION VERSION 1.11 Project : East Weld Sanitary landfill User: GB Date: 01-24-92 County : Weld State: CO Checked: _ Date: Subtitle: Pre-Construction Flows Drainage Area XVIII Subarea 18 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .03 E 0.422 Shallow Concent'd 200 .01 U 0.034 Open Channel 3000 4 0.208 Time of Concentration = 0.66* Subarea XVIII Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sg/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .006 E 0.803 Shallow Concent'd 300 .006 U 0.067 Open Channel 18000 4 1.250 Time of Concentration = 2.12* — Sheet Flow Surface Codes — A Smooth Surface F Grass, Dense — Shallow Concentrated — B Fallow (No Res.) G Grass, Burmuda — Surface Codes — C Cultivated < 20 % Res. H Woods, Light P Paved D Cultivated > 20 % Res. I Woods, Dense U Unpaved E Grass Range, Short * - Generated for use by TABUTAR method 9:7,07,33 TR-55 TABULAR DISCHARGE METHOD VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak and Tbtal Floras Total watershed area: 0.629 mini Rainfall type: II Frequency: 10 years Subareas Area(sq mi) 0.05* 0.10* 0.11* 0.10* 0.02* Rainfall(in) 2.6 2.6 2.6 2.6 2.6 Curve number 63* 63* 63* 63* 63* Runoff(in) 0.28 0.28 0.28 0.28 0.28 To (hrs) 0.47* 0.65* 0.40* 0.48* 0.47* (Used) 0.50 0.75 0.40 0.50 0.50 TimeTtCutlet 0.00 0.00 0.00 0.00 0.00 Ia/P 0.45 0.45 0.45 0.45 0.45 Time Total Subarea Contribution to Total Flow (cfs) (hr) Flow 1A lB 2 3 4 12.0 0 0 0 0 0 0 12.1 1 0 0 1 0 0 12.2 9 1 0 4 2 0 12.3 20 2 1 7 4 1P 12.4 30 3 2 9P 6 1 12.5 38P 4P 4 9 7P 1 12.6 38 4 5 7 7 1 12.7 37 3 6P 6 6 1 12.8 35 3 6 5 5 1 13.0 29 2 5 4 4 1 13.2 22 2 4 3 3 1 13.4 19 1 4 3 3 1 13.6 16 1 3 3 2 0 13.8 13 1 3 2 2 0 14.0 13 1 3 2 2 0 14.3 12 1 2 2 2 0 14.6 11 1 2 2 2 0 15.0 11 1 2 2 2 0 15.5 10 1 2 2 1 0 16.0 8 1 1 1 1 0 16.5 8 1 1 1 1 0 17.0 7 1 1 1 1 0 17.5 6 1 1 1 1 0 18.0 6 1 1 1 1 0 19.0 4 0 1 1 1 0 20.0 4 0 1 1 1 0 22.0 4 0 1 1 1 0 26.0 0 0 0 0 0 0 P - Peak Flow * - value(s) provided from TR-55 system routines 9;7O989 TR-55 TABULAR DISCHARGE METHOD VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked: Date: _ Subtitle: Post-Construction Peak and Total Flows Continuation of subarea information Subareas 5 6 7 8 9 Area(sq mi) 0.05* 0.12* 0.01* 0.02* 0.05* Rainfall(in) 2.6 2.6 2.6 2.6 2.6 Curve number 63* 63* 63* 63* 63* Runoff(in) 0.28 0.28 0.28 0.28 0.28 To (hrs) 0.46* 0.87* 0.41* 0.44* 0.77* (Used) 0.50 0.75 0.40 0.40 0.75 Time1b0utlet 0.00 0.00 0.00 0.00 0.00 Ia/P 0.45 0.45 0.45 0.45 0.45 Time Subarea Contribution to Total Flaw (cfs) (hr) 5 6 7 8 9 12.0 0 0 0 0 0 12.1 0 0 0 0 0 12.2 1 0 0 IP 0 12.3 2 1 1P 1 0 12.4 3 3 1 1 1 12.5 4P 5 1 1 2 12.6 3 6 1 1 3P 12.7 3 7P 1 1 3 12.8 3 7 1 1 3 13.0 2 6 1 1 3 13.2 2 5 0 0 2 13.4 1 4 0 0 2 13.6 1 4 0 0 2 13.8 1 3 0 0 1 14.0 1 3 0 0 1 14.3 1 3 0 0 1 14.6 1 2 0 0 1 15.0 1 2 0 0 1 15.5 1 2 0 0 1 16.0 1 2 0 0 1 16.5 1 2 0 0 1 17.0 1 1 0 0 1 17.5 0 1 0 0 1 18.0 0 1 0 0 1 19.0 0 1 0 0 0 20.0 0 1 0 0 0 22.0 0 1 0 0 0 26.0 0 0 0 0 0 P - Peak Flow * - value(s) provided from TR-55 system routines 920989 TR-55 CURVE NUMBER CCMPUPATICN VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Cb checked: _ Date: Subtitle: Post-Construction Peak and Total Flows Subarea : 1A Hydrologic Soil Group COVER DESCRIPTION A C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass urderstory) fair - - 32.4(63) - Total Area (by Hydrologic Soil Group) 32.4 SUBAREA: lA TOTAL DRAINAGE AREA: 32.4 Acres WEIGHTED CURVE NUMBER:63 T1-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked: Date: Subtitle: Post-Construction Peak and Total Flows SUbarea : 1B Hydrologic Soil Grow COVER DESCRIPTION A Acres (IN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass urderstory) fair - - 67.1(63) - Total Area (by Hydrologic Soil Group) 67.1 SUBAREA: 1B WEAL DRAINAGE AREA: 67.1 Acres WEIGHTED CURVE NUMBER:63 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 Canty : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak and Total Flows Subarea : 2 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass understory) fair - - 70.2(63) - Total Area (by Hydrologic Soil Group) 70.2 SUBAREA: 2 TOTAL DRAINAGE AREA: 70.2 Acres WEIGHTED CURVE NUMBER:63 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 Cournty : Weld State: Co Checked: _ Date: Subtitle: Postction Peak and Total Flows Subarea : 3 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass u nderstory) fair - - 62.2(63) - Total Area (by Hydrologic Soil Group) 62.2 SUBAREA: 3 TOTAL DRAINAGE AREA: 62.2 Acres WEIGHTED CURVE NUMBER:63 9Z)O383 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak and Total Flaws Subarea : 4 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (C VD ARID AND SEMIARID RANGELANDS Sagebrush (W/ grass urdersto y) fair - - 11.9(63) - Total Area (by Hydrologic Soil Group) 11.9 SUBAREA: 4 TOTAL DRAINAGE AREA: 11.9 Acres WEIGHTED CURVE NUMBER:63 TR-55 CURVE NUMBER COMPUTATION N VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld .State: Co Checked: _ Date: Subtitle: Post-Construction Peak and Total Flows Subarea : 5 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Sagebrush (W/ grass understory) fair - - 29.8(63) - Total Area (by Hydrologic Soil Group) 29.8 SUBAREA: 5 TOTAL DRAINAGE AREA: 29.8 Acres WEIQU'ID CURVE NUMBER:63 320989 2R-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak and Total Flows Subarea : 6 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass urxlerstory) fair - - 77.5(63) - Total Area (by Hydrologic Soil Group) 77.5 SUBAREA: 6 TOTAL DRAINAGE AREA: 77.5 Acres WEIGHTED CURVE NUBER:63 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked: Date: Subtitle: Post- Construction Peak and Total Flows Subarea : 7 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass urderstory) fair - - 9.3(63) - Total Area (by Hydrologic Soil Group) 9.3 SUBAREA: 7 TOTAL DRAINAGE AREA: 9.3 Acres WEIGHTED CURVE NUMBER:63 920389 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak and Total Flows Subarea : 8 Hydrologic Soil Group COVERDESCRIPTION A D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass understory) fair - - 10.1(63) - Total Area (by Hydrologic Soil Group) 10.1 SUBAREA: 8 TOTAL DRAINAGE AREA: 10.1 Acres WEIGHTED CURVE NUMBER:63 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak and Total Flows Subarea : 9 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass understory) fair - - 32.2(63) - Total Area (by Hydrologic Soil Group) 32.2 SUBAREA: 9 TOTAL DRAINAGE AREA: 32.2 Acres WEIGHTED CURVE NUMBER:63 92O389 TR-55 'It and Tt THRU SUBAREA COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked: Date: _ Subtitle: Post-Construction Peak and Total Flows Subarea lA Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) Sheet 3.8 300 .023 E 0.323 Shallow Concent'd 620 .053 U 0.046 Shallow Concent'd 400 .105 U 0.021 Open Channel 1200 4 0.083 Time of Concentration = 0.47* Subarea lB Flora Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (s4/ft) (ft) (ft/sec) (br) Sheet 1.8 300 .033 E 0.406 Shallow Concent'd 1450 .05 U 0.112 Shallow Concent'd 700 .091 U 0.040 Open Channel 1400 4 0.097 Time of Concentration = 0.65* Subarea 2 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (saJft) (ft) (ft/sec) (hr) Sheet 1.8 300 .08 E 0.285 Shallow Concent'd 1150 .052 U 0.087 Shallow Concent'd 600 .100 U 0.033 Time of Concentration = 0.40* Subarea 3 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (s4/ft) (ft) (ft/sec) (br) Sheet 1.8 300 .050 E 0.344 Shallow Concent'd 1300 .054 U 0.096 Shallow Concent'd 700 .100 U 0.038 Time of Concentration = 0.48* * - Generated for use by TABULAR method 920389 TR-55 To and Tt ThRU SUBAREA COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked _ Date: Subtitle: Post-Construction Peak and Total Flows Subarea 4 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .050 E 0.344 Shallow Concent'd 1250 .056 U 0.091 Shallow Concent'd 650 .100 U 0.035 Time of Concentration = 0.47* Subarea 5 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .050 E 0.344 Shallow Concent'd 1250 .056 U 0.091 Shallow Concent'd " 500 .13 U 0.024 Time of Concentration = 0.46* Subarea 6 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .010 E 0.655 Shallow Concent'd 1570 .051 U 0.120 Shallow Concent'd 650 .102 U 0.035 Open Channel 350 4.5 0.022 Open Channel 600 4 0.042 Time of Concentration = 0.87* Subarea 7 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .050 E 0.344 Shallow Concent'd 1000 .07 U 0.065 Time of Concentration = 0.41* * - Generated for use by TABULAR method 92O383 TR-55 Tc and Tt TH U SUBAREA COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak and Total Flows Subarea 8 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .05 E 0.344 Shallow Concent'd 1200 .05 U 0.092 Time of Concentration = 0.44* Subarea 9 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .010 E 0.655 Shallow Concent'd 750 .060 U 0.053 Shallow Concent'd 850 .06 U 0.060 Time of Concentration = 0.77* — Sheet Flow Surface Codes — A Smooth Surface F Grass, Dense — Shallow Concentrated — B Fallow (No Res.) G Grass, Burmuda — Surface Codes — C Cultivated < 20 % Res. H Woods, Light P Paved D Cultivated > 20 % Res. I Woods, Dense U Unpaved E Grass Range, Short * - Generated for use by TABULAR method 92O983 TR-55 TABULAR DISCHARGE METHOD VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak and Total Flows Total watershed area: 0.629 sq mi Rainfall type: II Frequency: 100 years Subareas 1A 1B 2 3 4 Area(sq mi) 0.05* 0.10* 0.11* 0.10* 0.02* Rainfall(in) 3.8 3.8 3.8 3.8 3.8 Curve number 63* 63* 63* 63* 63* Runoff(in) 0.81 0.81 0.81 0.81 0.81 To (hrs) 0.47* 0.65* 0.40* 0.48* 0.47* (Used) 0.50 0.75 0.40 0.50 0.50 TimeTaOutlet 0.00 0.00 0.00 0.00 0.00 Ia/P 0.31 0.31 0.31 0.31 0.31 Time Total Subarea Contribution to Total Flow (cfs) (hr) Flow IA 1B 2 3 4 11.9 0 0 0 0 0 0 12.0 3 0 0 2 1 0 12.1 23 2 1 10 4 1 12.2 64 6 2 25 12 2 12.3 122 12 7 41 24 5 12.4 164 17 14 43P 33 6P 12.5 178P 18P 22 36 34P 6 12.6 170 15 27 27 29 6 12.7 153 12 29P 21 23 4 12.8 133 10 27 16 18 4 13.0 95 6 21 11 12 2 13.2 71 5 15 9 9 2 13.4 57 4 12 8 7 1 13.6 46 3 9 7 6 1 13.8 42 3 8 6 6 1 14.0 37 3 7 6 5 1 14.3 32 2 6 5 4 1 14.6 28 2 5 4 4 1 15.0 26 2 4 4 4 1 15.5 23 2 4 4 3 1 16.0 19 2 3 3 3 1 16.5 18 1 3 3 3 1 17.0 15 1 3 3 3 0 17.5 14 1 3 3 2 0 18.0 14 1 3 3 2 0 19.0 12 1 2 2 2 0 20.0 11 1 2 2 2 0 22.0 10 1 2 2 1 0 26.0 0 0 0 0 0 0 P - Peak Flaw * - value(s) provided from TR-55 system routines 920353 TR-55 TABULAR DISCHARGE METHOD VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked: Date: _ Subtitle: Post-Construction Peak and Total Flows Continuation of subarea information Subareas 5 6 7 8 9 Area(sqmi) 0.05* 0.12* 0.01* 0.02* 0.05* Rainfall(in) 3.8 3.8 3.8 3.8 3.8 Curve number 63* 63* 63* 63* 63* Runoff(in) 0.81 0.81 0.81 0.81 0.81 ' TO (irs) 0.46* 0.87* 0.41* 0.44* 0.77* (Used) 0.50 0.75 0.40 0.40 0.75 Time'IbOutlet 0.00 0.00 0.00 0.00 0.00 Ia/P 0.31 0.31 0.31 0.31 0.31 Time Subarea Contribution to Total Flow (cfs) (hr) 5 6 7 8 9 11.9 0 0 0 0 0 12.0 0 0 0 0 0 12.1 2 1 1 1 0 12.2 6 3 3 4 1 12.3 11 8 5 6P 3 12.4 16P 16 6P 6 7 12.5 16 25 5 5 11 12.6 14 31 4 4 13 12.7 11 33P 3 3 14P 12.8 9 32 2 2 13 13.0 6 24 1 2 10 13.2 4 18 1 1 7 13.4 4 13 1 1 6 13.6 3 11 1 1 4 13.8 3 9 1 1 4 14.0 2 8 1 1 3 14.3 2 7 1 1 3 14.6 2 6 1 1 2 15.0 2 5 1 1 2 15.5 2 4 0 1 2 16.0 1 4 0 0 2 16.5 1 4 0 0 2 17.0 1 3 0 0 1 17.5 1 3 0 0 1 18.0 1 3 0 0 1 19.0 1 3 0 0 1 20.0 1 2 0 0 1 22.0 1 2 0 0 1 26.0 0 0 0 0 0 P - Peak Flaw * - value(s) provided from TR-55 system routines 920389 TR-55 CURVE NUMBER COMPITPATICN VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 Canty : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak and Total Flows Subarea : lA Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass uaderstory) fair - - 32.4(63) - Total Area (by Hydrologic Soil Group) 32.4 SUBAREA: lA TOTAL DRAINAGE AREA: 32.4 Acres WEURIPID CURVE NUMBER:63 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 Canty : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak and Total Flows Subarea : lB Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass rnderstory) fair - - 67.1(63) - Total Area (by Hydrologic Soil Group) 67.1 SUBAREA: lB TOTAL DRAINAGE AREA: 67.1 Acres WEIGHTED CURVE NUMBER:63 92;0389 TR-55 CURVE NUMBER C MPUPATICN VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 Canty : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak and Total Flows Subarea : 2 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass understory) fair - - 70.2(63) - Total Area (by Hydrologic Soil Group) 70.2 SUBAREA: 2 TOTAL DRAINAGE AREA: 70.2 Acres WEIGHTED CURVE NUMBER:63 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co thedked: _ Date: Subtitle: Post-Construction Peak and Total Flows Subarea : 3 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass understory) fair - - 62.2(63) - Total Area (by Hydrologic Soil Group) 62.2 SUBAREA: 3 TOTAL DRAINAGE AREA: 62.2 Acres WEIGHTED CURVE NUMBER:63 92989 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak and Total Flows Subarea : 4 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass iuderstory) fair - - 11.9(63) - Total Area (by Hydrologic Soil Group) 11.9 SUBAREA: 4 TOTAL DRAINAGE AREA: 11.9 Acres WEIGHTED CURVE NUMBER:63 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak and Total Flows Subarea : 5 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass iuderstory) fair - - 29.8(63) - Total Area (by Hydrologic Soil Group) 29.8 SUBAREA: 5 TOTAL DRAINAGE AREA: 29.8 Acres WEIGHTED CURVE NUMBER:63 9Z0aj TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak and Total Flows Subarea : 6 Hydrologic Soil Group DOVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass understory) fair - - 77.5(63) - Total Area (by Hydrologic Soil Group) 77.5 SUBAREA: 6 TOTAL DRAINAGE AREA: 77.5 Acres WEIGHTED CURVE NUMBER:63 TR-55 CURVE NUMBER OZMPUIATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak and Total Flows Subarea : 7 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass understory) fair - - 9.3(63) - Total Area (by Hydrologic Soil Group) 9.3 SUBAREA: 7 TOTAL DRAINAGE AREA: 9.3 Acres WEIGHTED CURVE NUMBER:63 92;0989 2R-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak and Total Flaws Subarea : 8 Hydrologic Soil Group COVER DESC122PTICk4 A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass unierstory) fair - - 10.1(63) - Total Area (by Hydrologic Soil Croup) 10.1 SUBAREA: 8 TOTAL DRAINAGE AREA: 10.1 Acres WEIGHTED CURVE NUMBER:63 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill Timm" GB Date: 01-20-92 County : Weld State: Co Checked: Date: Subtitle: Post-Construction Peak and Total Flows Subarea : 9 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass unierstory) fair - - 32.2(63) - Total Area (by Hydrologic Soil Croup) 32.2 SUBAREA: 9 TOTAL DRAINAGE AREA: 32.2 Acres WEIGHTED CURVE NUMBER:63 92O389 TR-55 Tc and Tt T RU SUBAREA CXt4PUPATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak and Total Flaws Subarea lA Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sg/ft) (ft) (ft/sec) (hr) Sheet 3.8 300 .023 E 0.323 Shallow Concent'd 620 .053 U 0.046 Shallow Concent'd 400 .105 U 0.021 Open Channel 1200 4 0.083 Time of Concentration = 0.47* Subarea 1B Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sg/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .033 E 0.406 Shallow Concent'd 1450 .05 U 0.112 Shallow Concent'd 700 .091 U 0.040 Open Channel 1400 4 0.097 Time of Concentration = 0.65* Subarea 2 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sg/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .08 E 0.285 Shallow Concent'd 1150 .052 U 0.087 Shallow COncent'd 600 .100 U 0.033 Time of Concentration = 0.40* Subarea 3 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sg/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .050 E 0.344 Shallow COncerrt'd 1300 .054 U 0.096 Shallow Concent'd 700 .100 U 0.038 Time of Concentration = 0.48* * - Generated for use by TABULAR method 920383 222-55 To and Tt THRU SUBAREA COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 Canty : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak and Total Flows Subarea 4 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (s4/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .050 E 0.344 Shallow Concent'd 1250 .056 U 0.091 Shallow Concent'd 650 .100 U 0.035 Time of Concentration = 0.47* Subarea 5 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .050 E 0.344 Shallow Concent'd 1250 .056 U 0.091 Shallow Concent'd 500 .13 U 0.024 Time of Concentration = 0.46* Subarea 6 Flaw Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sg/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .010 E 0.655 Shallow Concent'd 1570 .051 U 0.120 Shallow Concent'd 650 .102 U 0.035 Open Channel 350 4.5 0.022 Open Channel 600 4 0.042 Time of Concentration = 0.87* Subarea 7 Flaw Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .050 E 0.344 Shallow Concent'd 1000 .07 U 0.065 Time of Concentration = 0.41* * - Generated for use by TABULAR method 9383 • TR-55 Td and Tt THRU SUBAREA COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak and Total Flows Subarea 8 Flow Type 2 year length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .05 E 0.344 Shallow Concent'd 1200 .05 U 0.092 Time of Concentration = 0.44* Subarea #10 - 9 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .010 E 0.655 Shallow Concent'd 750 .060 U 0.053 Shallow Concent'd 850 .06 U 0.060 Time of Concentration = 0.77* — Sheet Flow Surface Codes — A Smooth Surface F Grass, Dense — Shallow Concentrated — B Fallow (No Res.) G Grass, B unuda — Surface Codes — C Cultivated < 20 % Res. H Woods, Light P Paved D Cultivated > 20 % Res. I Woods, Dense U Unpaved E Grass-Range, Short * - Generated for use by TABULAR method • 920389 TR-55 TABULAR DISCHARGE METHOD VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak Flows Total watershed area: 0.569 sq mi Rainfall type: II Frequency: 10 years Subareas 10 11 12 13 14 Area(sq mi) 0.03* 0.21* 0.09* 0.01* 0.02* Rainfall(in) 2.6 2.6 2.6 2.6 2.6 Qnrve number 63* 63* 63* 63* 63* Runoff(in) 0.28 0.28 0.28 0.28 0.28 Tc (hrs) 0.66* 0.57* 0.70* 0.66* 0.40* (Used) 0.75 0.50 0.75 0.75 0.40 TimeTc0utlet 0.00 0.00 0.00 0.00 0.00 Ia/P 0.45 0.45 0.45 0.45 0.45 Time Total Subarea Contribution to Total Flow (cfs) (hr) Flow 10 11 12 13 14 12.0 0 0 0 0 0 0 12.1 1 0 1 0 0 0 12.2 5 0 3 0 0 1 12.3 15 0 8 1 0 1 12.4 28 1 14 2 0 2P 12.5 34 1 16P 3 1P 2 12.6 35P 1 15 5P 1 1 12.7 34 2P 13 5 1 1 12.8 32 2 11 5 1 1 13.0 27 1 9 5 1 1 13.2 22 1 7 4 1 1 13.4 18 1 6 3 1 0 13.6 15 1 5 3 0 0 13.8 13 1 5 2 0 0 14.0 12 1 4 2 0 0 14.3 11 1 4 2 0 0 14.6 10 1 4 2 0 0 15.0 7 0 3 1 0 0 15.5 7 0 3 1 0 0 16.0 7 0 3 1 0 0 16.5 7 0 3 1 0 0 17.0 5 0 2 1 0 0 17.5 5 0 2 1 0 0 18.0 5 0 2 1 0 0 19.0 5 0 2 1 0 0 20.0 4 0 2 1 0 0 22.0 4 0 2 1 0 0 26.0 0 0 0 0 0 0 P - Peak Flow * - value(s) provided frr TR-55 system routines 920389 TRr-55 TABULAR DISCHARGE METHOD VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked: Date: Subtitle: Post-Construction Peak Floras Continuation of subarea information Subareas 15 16 17 18 Area(sq mi) 0.03* 0.01* 0.06* 0.12* Rainfall(in) 2.6 2.6 2.6 2.6 Curve number 63* 63* 63* 63* Runoff(in) 0.28 0.28 0.28 0.28 TO (hrs) 0.46* 0.28* 0.54* 0.80* (Used) 0.50 0.30 0.50 0.75 TimeTb0utlet 0.00 0.00 0.00 0.00 Ia/P 0.45 0.45 0.45 0.45 Time Subarea Contribution to Total Flow (cfs) (hr) 15 16 17 18 12.1 0 0 0 0 12.2 0 0 1 0 12.3 1 IP 2 1 12.4 2P 0 4P 3 12.5 2 0 4 5 12.6 2 0 4 6 12.7 2 0 3 7 12.8 1 0 3 8P 13.0 1 0 2 7 13.2 1 0 2 5 13.4 1 0 2 4 13.6 1 0 1 4 13.8 1 0 1 3 14.0 1 0 1 3 14.3 0 0 1 3 14.6 0 0 1 2 15.0 0 0 1 2 15.5 0 0 1 2 16.0 0 0 1 2 16.5 0 0 1 2 17.0 0 0 1 1 17.5 0 0 1 1 18.0 0 0 1 1 19.0 0 0 1 1 20.0 0 0 0 1 22.0 0 0 0 1 26.0 0 0 0 0 P - Peak Flora * - value(s) provided from TR-55 system routines 9Z0389 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak Flows Subarea : 10 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS SSaagebr„Sh (w/ grass understory)y) fair - - 17.2(63) - Total Area (by Hydrologic Soil Group) 17.2 SUBAREA: 10 TOTAL DRAIN AREA: 17.2 Acres WEIGHTED CURVE NUMBER:63 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 C unty : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak Flows Subarea : 11 Hydrologic Soil Group COVER DESCRIPTICN A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass ur erstory) fair - - 134(63) - Total Area (by Hydrologic Soil Group) 134 SUBAREA: 11 TOTAL DRAINAGE AREA: 134 Acres WEIGHTED CURVE NUMBER:63 9;t O389 T1-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 Qxnty : Weld State: CO Checked: _ Date: Subtitle: Post-Construction Peak Flows Subarea : 12 Hydrologic Soil Group COVER DESCRIPTION A D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass unierstory) fair - - 56.6(63) - Total Area (by Hydrologic Soil Group) 56.6 SUBAREA: 12 TOTAL DRAINAGE AREA: 56.6 Acres WEIGHTED CURVE NUMBER:63 RR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked: Date: Subtitle: Post-Construction Peak Flows Subarea : 13 Hydrologic Soil Group CLOVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Sagelsh (w/ grass understory) fair - - 9.4(63) - Total Area (by Hydrologic Soil Group) 9.4 SUBAREA: 13 TOTAL DRAINAGE AREA: 9.4 Acres WEIGHTED CURVE NUMBER:63 920389 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak Flaws Subarea : 14 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass uhderstory) fair - - 12.1(63) - Total Area (by Hydrologic Soil Group) 12.1 SUBAREA: 14 TOTAL DRAINAGE AREA: 12.1 Acres WEIGHTED CURVE NUMBER:63 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak Flows Subarea : 15 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass understory) fair - - 16.2(63) - Total Area (by Hydrologic Soil Group) 16.2 SUBAREA: 15 TOTAL DRAINAGE AREA: 16.2 Acres WEIGHTED CURVE NUMBER:63 92',0389 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 Camty : Weld State: Co Checked: _ Date: Subtitle: Pre-Construction Peak Flows Subarea : 16 Hydrologic Soil Group OVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass understory) fair - - 3.5(63) - Total Area (by Hydrologic Soil Group) 3.5 SUBAREA: 16 TOTAL DRAINAGE AREA: 3.5 Acres WEIGHTED CURVE NUMBER:63 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 Camty : Weld State: CO Checked: _ Date: Subtitle: Post-Construction Peak Flows Subarea : 17 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Sagebrush .(w/ grass understory) fair - - 35.6(63) - Total Area (by Hydrologic Soil Group) 35.6 SUBAREA: 17 TOTAL DRAINAGE AREA: 35.6 Acres WEIGHTED CURVE NUMBER:63 92'09r TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak Flows Subarea : 18 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass understory) fair - - 79.8(63) - Total Area (by Hydrologic Soil Group) 79.8 SUBAREA: 18 TOTAL DRAINAGE AREA: 79.8 Acres WEIGHTED CURVE NUMBER:63 920389 TR-55 Tt and Tt TBRU SUBAREA COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 aunty : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak Flows Subarea 10 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sg/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .013 E 0.590 Shallow Con nt'd 580 .086 U 0.034 Shallow COncent'd 520 .077 U 0.032 Time of Concentration = 0.66* Subarea 11 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (scx/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .027 E 0.440 Shallow Concent'd 250 .030 U 0.025 Shallow Concent'd 1550 .071 U 0.100 Time of Concentration = 0.57* Subarea 12 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (mg/ft) (ft) (ft/sec) (hr) Sheet 1.8 150 .010 E 0.376 Sheet 150 .050 E 0.198 Shallow Cencent'd 415 .055 U 0.030 Shallow Concent'd 1420 .070 U 0.092 Time of Concentration = 0.70* Subarea 13 Flaw Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) (Ind- (sa/ft) (ft) (ft/sec) (hr) Sheet 1.8 150 .01 E 0.376 Sheet 150 .05 E 0.198 Shallow Concent'd 300 .070 U 0.020 Shallow tt'd 950 .063 U 0.065 Time of Concentration = 0.66* * - Generated for use by TABULAR method 32O3233 TR-55 To and Tt THRU SUBAREA COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked: Date: _ Subtitle: Post-Construction Peak Flows Subarea 14 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sg/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .06 E 0.320 Shallow Concent'd 500 .064 U 0.034 Shallow Concent'd 780 .077 U 0.048 Tine of Concentration = 0.40* Subarea 15 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sg/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .043 E 0.365 Shallow Cancent'd 1000 .058 U 0.071 Shallow Concent'd 350 .089 U 0.020 Time of Concentration = 0.46* Subarea 16 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sg/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .09 E 0.272 Shallow Cancent'd 200 .11 U 0.010 Time of Concentration = 0.28* Subarea 17 Flaw Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sg/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .050 E 0.344 Shallow Concent'd 600 .027 U 0.063 Shallow Concent'd 1900 .063 U 0.130 Time of Concentration = 0.54* * - Generated far use by TABULAR method 920389 TR-55 Tc and Tt THRU SUBAREA COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak Flows Subarea 18 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (s4/ft) (ft) (ft/sec) (1w) Sheet 1.8 300 .02 E 0.496 Shallow C0ncent'd 400 .018 U 0.051 Shallow Concent'd 1300 .085 U 0.077 Open Charnel 450 4.5 0.028 Open Channel 2200 4 0.153 Time of Concentration = 0.80* — Sheet Flow Surface Codes --- A Smooth Surface F Grass, Dense — Shallow Concentrated — B Fallow (No Res.) G Grass, Burmuda — Surface Codes — C Cultivated < 20 % Res. H Woods, Light P Paved D Cultivated > 20 % Res. I Woods, Dense U Unpaved E Grass Range, Short * - Generated for use by TABULAR method 92'0389 TR-55 TABULAR DISCHARGE METHOD VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak Flows Total watershed area: 0.569 sq mi Rainfall type: II Frequency: 100 years Subareas 10 11 12 13 14 Area(sqmi) 0.03* 0.21* 0.09* 0.01* 0.02* Rainfall(in) 3.8 3.8 3.8 3.8 3.8 Curve number 63* 63* 63* 63* 63* Runoff(in) 0.81 0.81 0.81 0.81 0.81 TO Ctrs) 0.66* 0.57* 0.70* 0.66* 0.40* (Used) 0.75 0.50 0.75 0.75 0.40 TimeToOutlet 0.00 0.00 0.00 0.00 0.00 Ia/P 0.31 0.31 0.31 0.31 0.31 Time Total Subarea Contribution to Total Flow (cfs) (hr) Flow 10 11 12 13 14 12.0 2 0 2 0 0 0 12.1 16 0 9 0 0 2 12.2 48 1 26 2 0 4 12.3 98 2 52 6 1 7P 12.4 143 4 71 12 2 7 12.5 162P 6 73P 19 3 6 12.6 160 7P 63 23 4P 5 12.7 143 7 50 24P 4 4 12.8 126 7 40 23 4 3 ' 13.0 89 5 27 17 3 2 13.2 66 4 20 13 2 2 13.4 52 3 16 10 2 1 13.6 43 2 14 8 1 1 13.8 36 2 12 7 1 1 14.0 33 2 11 6 1 1 14.3 29 1 10 5 1 1 14.6 25 1 9 4 1 1 15.0 23 1 8 4 1 1 15.5 21 1 7 3 1 1 16.0 19 1 7 3 0 1 16.5 18 1 6 3 0 1 17.0 13 1 5 2 0 0 17.5 13 1 5 2 0 0 18.0 13 1 5 2 0 0 19.0 12 1 4 2 0 0 20.0 10 1 4 2 0 0 22.0 7 0 3 1 0 0 26.0 0 0 0 0 0 0 P - Peak Flow * - value(s) provided fran TR-55 system routines 920389 TR-55 TABULAR DISCHARGE METHOD VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 Dainty : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak Flows Continuation of subarea information Subareas 15 16 17 18 Area(sq mi) 0.03* 0.01* 0.06* 0.12* Rainfall(in) 3.8 3.8 3.8 3.8 Curve number 63* 63* 63* 63* Runoff(in) 0.81 0.81 0.81 0.81 TO (hrs) 0.46* 0.28* 0.54* 0.80* (Used) 0.50 0.30 0.50 0.75 TimeToOutlet 0.00 0.00 0.00 0.00 Ia/P 0.31 0.31 0.31 0.31 Time Subarea Contribution to Total Flora (cfs) (hr) 15 16 17 18 12.1 1 1 2 1 12.2 3 2P 7 3 12.3 6 2 14 8 12.4 9P 2 19P 17 12.5 9 1 19 26 12.6 8 1 17 32 12.7 6 1 13 34P 12.8 5 1 11 32 13.0 3 0 7 25 13.2 2 0 5 18 13.4 2 0 4 14 13.6 2 0 4 11 13.8 1 0 3 9 14.0 1 0 3 8 14.3 1 0 3 7 14.6 1 0 2 6 15.0 1 0 2 5 15.5 1 0 2 5 16.0 1 0 2 4 16.5 1 0 2 4 17.0 1 0 1 3 17.5 1 0 1 3 18.0 1 0 1 3 19.0 1 0 1 3 20.0 0 0 1 2 22.0 0 0 1 2 26.0 0 0 0 0 P - Peak Flaw * - value(s) provided from TR-55 system routines 9?"09£ 9. TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak Flows Subarea : 10 Hydrologic Soil Group COVER DFSC RIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass urderstory) fair - - 17.2(63) - 'Dotal Area (by Hydrologic Soil Group) 17.2 SUBAREA: 10 TOTAL DRAINAGE AREA: 17.2 Acres WEIGHTED CURVE NUMBER:63 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 Canty : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak Flows Subarea : 11 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass ur derstory) fair - - 134(63) - Total Area (by Hydrologic Soil Group) 134 SUBAREA: 11 OPAL DRAINAGE AREA: 134 Acres WEIGHTED CURVE NUMBER:63 9z€38-c TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked: _ Date: Subtitle: Post-struction Peak Flows Subarea : 12 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Sagebrush (W/ grass understory) fair - - 56.6(63) - Total Area (by Hydrologic Soil Croup) 56.6 SUBAREA: 12 TOTAL DRAINAGE AREA: 56.6 Acres WEIGHTED CURVE NUMBER:63 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 Canty : Weld • State: Co Checked: _ Date: Subtitle: Post-Construction Peak Flows Subarea : 13 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass understory) fair - - 9.4(63) - Total Area (by Hydrologic Soil Group) 9.4 SUBAREA: 13 TOTAL DRAINAGE AREA: 9.4 Acres WEIGHTED CURVE NUMBER:63 920383 28-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 aunty : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak Flows Subarea : 14 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass uundersto y) fair - - 12.1(63) - Total Area (by Hydrologic Soil Grasp) 12.1 SUBAREA: 14 TOTAL DRAINAGE AREA: 12.1 Acres WEIGHTED CURVE NUMBER:63 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co checked: _ Date: Subtitle: Post-Construction Peak Flaws Subarea : 15 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrugh (w/ grass ur dersto y) fair - - 16.2(63) - Total Area (by Hydrologic Soil Group) 16.2 SUBAREA: 15 TOTAL DRAINAGE AREA: 16.2 Acres WEIGHTED CURVE NUMBER:63 920:359 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 Canty : Weld State: Co Ciecked: T Date: Subtitle: Post-Construction Peak Flows Subarea : 16 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass urderstory) fair - - 3.5(63) - Total Area (by Hydrologic Soil Group) 3.5 SUBAREA 16 TOTAL DRAINAGE AREA: 3.5 Acres WEIGHTED CURVE NUMBER:63 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 Canty : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak Flows Subarea : 17 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebmish (w/ grass understory) fair - - 35.6(63) - Total Area (by Hydrologic Soil Group) 35.6 SUBAREA: 17 TOTAL DRAINAGE AREA: 35.6 Acres WEIGHTED CURVE NUMBER:63 920389 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Chedced: _ Date: Subtitle: Post-Construction Peak Flows Subarea : 18 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass ur derstory) fair - - 79.8(63) - Tatal Area (by Hydrologic Soil Grasp) 79.8 SUBAREA: 18 TOTAL DRAINAGE AREA: 79.8 Acres WEIGHTED CURVE NUMBER:63 920383 TR-55 To and Tt THRU SUBAREA COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 County : Weld State: Co Checked: _ Date: Subtitle: Post-Ccalstruction Peak Flaws Subarea 10 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) ( ') Sheet 1.8 300 .013 E 0.590 Shallow Concent'd 580 .086 U 0.034 Shallow Concent'd 520 .077 U 0.032 Time of Concentration = 0.66* Subarea 11 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sqjft) (ft) (ft/sec) (hr) Sheet 1.8 300 .027 E 0.440 Shallow Concent'd 250 .030 U 0.025 Shallow Concent'd 1550 .071 U 0.100 Time of Concentration = 0.57* Subarea 12 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 150 .010 E 0.376 Sheet 150 .050 E 0.198 Shallow C ncent'd 415 .055 U 0.030 Shallow Concent'd 1420 .070 U 0.092 Time of Concentration = 0.70* Subarea 13 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) rnd (sq/ft) (ft) (ft/sec) (hr) Sheet 1.8 150 .01 E 0.376 Sheet 150 .05 E 0.198 Shallow Concent'd 300 .070 U 0.020 Shallow Concent'd 950 .063 U 0.065 Time of Concentration = 0.66* * - Generated for use by TABULAR method 920389 TR-55 To and Tt TBRU SUBAREA COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-20-92 Ommty : Weld State: Co Checked: _ Date: Subtitle: Post-Construction Peak Flaws Subarea 14 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sg/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .06 E 0.320 Shallow oaioent'd 500 .064 U 0.034 Shallow COncent'd 780 .077 U 0.048 Time of Concentration = 0.40* Subarea 15 Flaw Type 2 year Leith Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sg/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .043 E 0.365 Shallow Concent'd 1000 .058 U 0.071 Shallow Concent'd 350 .089 U 0.020 Time of Concentration = 0.46* Subarea 16 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sg/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .09 E 0.272 Shallow Concent'd 200 .11 U 0.010 Time of Concentration = 0.28* Subarea 17 Flaw Type 2 pent- Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sg/ft) (ft) (ft/sec) (1r) Sheet 1.8 300 .050 E 0.344 Shallow Ooncent'd 600 .027 U 0.063 Shallow Concent'd 1900 .063 U 0.130 Time of Concentration = 0.54* * - Generated for use by TABULAR method 920359 TR-55 'It and Tt THRU SUBAREA COMPUTATION VERSION 1.11 Subarea 18 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (sg/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .02 E 0.496 Shallow COncent'd 400 .018 U 0.051 Shallow Concent'd 1300 .085 U 0.077 Open Channel 450 4.5 0.028 Open Channel 2200 4 0.153 Time of Concentration = 0.80* — Sheet Flaw Surface Codes — A Smooth Surface F Grass, Dense — Shallow Concentrated — B Fallow (No Res.) G Grass, Burmuda — Surface Codes — C Cultivated < 20 % Res. H Woods, Light P Paved D Cultivated > 20 % Res. I Woods, Dense U Unpaved E Crass Range, Short * - Generated for use by TABULAR method 920389 TR-55 TABULAR DISCHARGE METHOD VERSION 1.11 • Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak and Total Flows Drainage Area I Total watershed area: 0.819 sq mi Rainfall type: II Frequency: 100 years Subareas 1 I Area(sq mi) 0.05* 0.77* Rainfall(in) 3.8 3.8 Curve number 63* 63* Runoff(in) 0.81 0.81 To (hrs) 0.47 0.99 (Used) 0.50 1.00 TimeTcOutlet 0.99 0.00 (Used) 1.00 0.00 Ia/P 0.31 0.31 Time Total Subarea Contribution to Total Flow (cfs) (hr) Flow 1 I 12.1 2 0 2 12.2 9 0 9 12.3 25 0 25 12.4 50 0 50 12.5 83 0 83 12.6 118 0 118 12.7 148 0 148 12.8 166 1 165 13.0 182P 4 178P 13.2 148 8 140 13.4 122 12P 110 13.6 100 11 89 13.8 83 10 73 14.0 68 7 61 14.3 54 5 49 14.6 46 4 42 15.0 38 3 35 15.5 32 2 30 16.0 29 2 27 16.5 26 2 24 17.0 24 2 22 17.5 21 1 20 18.0 20 1 19 19.0 18 1 17 20.0 16 1 15 22.0 13 1 12 26.0 0 0 0 P - Peak Flow * - value(s) provided from TR-55 system routines 920389 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill Ucar: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak and Total Flaws Drainage Area I Subarea : 1 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass unierstory) fair - - 32.4(63) - Total Area (by Hydrologic Soil Group) 32.4 SUBAREA: 1 TOTAL DRAINAGE AREA: 32.4 Acres WEIGHTED CURVE NU44BER:63 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak and Total Flows Drainage Area I Subarea : I Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Desert shrub fair 274(55) 218(72) - - Total Area (by Hydrologic Soil Group) 274 218 SUBAREA: I TOTAL DRAINAGE AREA: 492 Acres WEIGHTED CURVE NUMBER:63 92038,.9 TR-55 TABULAR DISCHARGE METHOD VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Areas II, III and BE-1 Total watershed area: 6.219 sq mi Rainfall type: II Frequency: 100 years Subareas 1B II 2 III BE-1 Area(sq mi) 0.10* 0.70* 0.11* 0.29* 5.02* Rainfall(in) 3.8 3.8 3.8 3.8 3.8 Curve number 63* 55* 63* 55* 55* Runoff(in) 0.81 0.45 0.81 0.45 0.45 To (hrs) 0.65 0.44 1.17 0.48 2.67* (Used) 0.75 0.40 1.50 0.50 0.30 TimeToOutlet 0.62 0.19 0.66 0.19 0.00 (Used) 0.50 0.20 0.75 0.20 0.20 Ia/P 0.31 0.43 0.31 0.43 0.43 Time Total Subarea Contribution to Total Flow (cfs) (hr) Flow 1B II 2 III BE-1 12.0 5 0 0 0 0 5 12.1 27 0 2 0 0 25 12.2 131 0 7 0 1 123 12.3 390 0 24 0 5 361 12.4 695 1 54 0 13 627 12.5 822P 2 80 0 23 717P 12.6 785 4 91P 1 31 658 12.7 690 8 86 1 34P 561 12.8 593 13 76 3 33 468 13.0 441 22 55 7 26 331 13.2 358 24P 42 13 20 259 13.4 309 21 34 18 16 220 13.6 274 17 29 20P 13 195 13.8 249 13 26 19 12 179 14.0 227 10 24 17 10 166 14.3 199 8 21 13 9 148 14.6 175 6 19 10 8 132 15.0 160 5 17 8 7 123 15.5 147 4 16 6 7 114 16.0 134 4 15 5 6 104 16.5 119 3 13 4 6 93 17.0 113 3 12 4 5 89 17.5 107 3 12 3 5 84 18.0 104 3 11 3 5 82 19.0 92 2 10 3 4 73 20.0 81 2 9 2 4 64 22.0 72 2 8 2 3 57 P - Peak Flow * - value(s) provided from TR-55 system routines 9k1)38,9 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flaws Drainage Areas II, III and BE-1 Subarea : lB Hydrologic Soil Group COVER DESCRIPtt ION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass urderstary) fair - - 67.1(63) - Total Area (by Hydrologic Soil Group) 67.1 SUBAREA: IB TOTAL DRAINAGE AREA: 67.1 Acres WEIGHTED CURVE NUMB R:63 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Areas II, III and BE-1 Subarea : II Hydrologic Soil Group COVER DESCRIPTICN A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 448(55) - - - Total Area (by Hydrologic Soil Group) 448 SUBAREA: II TOTAL DRAINAGE AREA: 448 Acres WEIGHTED CURVE N MBER:55 92'90389 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Areas II, III and BE-1 Subarea : 2 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass understory) fair - - 70.2(63) - Total Area (by Hydrologic Soil Group) 70.2 SUBAREA: 2 TOTAL DRAINAGE AREA: 70.2 Acres WEIGHTED CURVE NUMBER:63 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill •User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Areas II,III and BE-1 Subarea : III Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Douert shrub fair 184(55) - - - Total Area (by Hydrologic Soil Group) 184 SUBAREA: III TOTAL DRAINAGE AREA: 184 Acres WEIGHTED CURVE NUMBER:55 920389 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post- Construction Peak Flows Drainage Areas II, III and BE-1 Subarea : BE-1 A COVER DESCRIPTION HydroBogic Soil Group C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 3211(55) - - - Total Area (by Hydrologic Soil Group) 3211 SUBAREA: BE-1 TOTAL DRAINAGE AREA: 3211 Acres WEIGHTED CURVE NUMBER:55 TR-55 Tc and Tt THRU SUBAREA CQ PUTATTON VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Constriction Peak Flaws Drainage Areas II, III and BE-1 Subarea #5 - BE-1 Flaw Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (s4/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 0.1 E 0.261 Shallow Concent'd 1000 .013 U 0.151 Open Channel 5000 4 0.347 Open Channel 20600 3 1.907 Time of Concentration = 2.67* — Sheet Flow Surface Codes — A gnnoth Surface F Grass, Dense — Shallow Concentrated — B Fallow (No Res.) G Grass, Burmuda — Surface Codes — C Cultivated < 20 % Res. H Woods, Light P Paved D Cultivated > 20 % Res. I W^rriq, Dense U Unpaved E Grass Range, Short * - Generated for use by TABULAR method 9;;;O389 91X 55 TABULAR DISCHARGE METHOD VERSION 1.11 Project : E. Weld Sanitary landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flaws Drainage Areas IV, VI, VII and VIII Total watershed area: 0.493 sq mi Rainfall type: II Frequency: 100 years Subareas 3 IV 4 VI 6 Area(sq mi) 0.10* 0.07* 0.02* 0.04* 0.12* Rainfall(in) 3.8 3.8 3.8 3.8 3.8 Curve nutter 63* 55* 63* 55* 63* Runoff(in) 0.81 0.45 0.81 0.45 0.81 Tc (brs) 0.28 0.13 0.47 0.17 0.87 (Used) 0.30 0.10 1.50 0.20 1.00 TimeToOutlet 0.12 0.00 0.16 0.00 0.18 (Used) 0.10 0.00 0.10 0.00 0.10 Ia/P 0.31 0.43 0.31 0.43 0.31 Time Total Subarea Contribution to Total Flow (cfs) (hr) Flow 3 IV 4 VI 6 11.9 2 0 2 0 0 0 12.0 13 1 7 0 1 0 12.1 42 3 21P 0 5 0 12.2 65 14 13 1 10P 0 12.3 74 32 6 2 8 1 12.4 79P 40P 5 4 5 3 12.5 76 37 5 5 4 6 12.6 70 28 4 6P 3 11 12.7 65 21 3 6 3 16 12.8 60 16 3 5 2 21 13.0 54 10 3 3 2 27P 13.2 47 8 3 2 2 25 13.4 40 7 2 2 2 21 13.6 33 6 2 1 2 16 13.8 28 5 2 1 1 13 14.0 25 5 2 1 1 11 14.3 22 4 2 1 1 9 14.6 20 4 2 1 1 7 15.0 18 4 2 1 1 6 15.5 15 3 1 1 1 5 16.0 13 3 1 1 1 4 16.5 12 3 1 1 1 4 17.0 11 3 1 0 1 4 17.5 9 2 1 0 1 3 18.0 9 2 1 0 1 3 19.0 9 2 1 0 1 3 20.0 8 2 1 0 1 2 P - Peak Flow * - value(s) provided IL a TR-55 system routines 920389 TR755 TABULAR DISCHARGE METHOD VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Areas IV, VI, VII and VIII Continuation of subarea information Subareas VII 7 VIII 8 Area(sq mi) 0.06* 0.01* 0.05* 0.02* Rainfall(in) 3.8 3.8 3.8 3.8 Curve number 55* 63* 55* 63* Runoff(in) 0.45 0.81 0.45 0.81 TO (hrs) 0.19 0.41 0.15 0.44 (Used) 0.20 0.40 0.20 0.40 TimeTo0utlet 0.00 0.14 0.00 0.14 (Used) 0.00 0.10 0.00 0.20 Ia/P 0.43 0.31 0.43 0.31 Time Subarea Contribution to Total Flow (cfs) (hr) VII 7 VIII 8 12.0 2 0 2 0 12.1 7 0 6 0 12.2 14P 1 liP 1 12.3 11 3 9 2 12.4 7 5P 6 4 12.5 5 5 4 5P 12.6 4 5 4 5 12.7 4 4 3 5 12.8 3 3 3 4 13.0 3 2 2 2 13.2 2 1 2 2 13.4 2 1 2 1 13.6 2 1 2 1 13.8 2 1 2 1 14.0 2 1 1 1 14.3 2 1 1 1 14.6 2 1 1 1 15.0 1 1 1 1 15.5 1 1 1 1 16.0 1 0 1 1 16.5 1 0 1 0 17.0 1 0 1 0 17.5 1 0 1 0 18.0 1 0 1 0 19.0 1 0 1 0 20.0 1 0 1 0 22.0 1 0 1 0 P - Peak Flow * - value(s) provided fran TR-55 system routines at e389 89 T -55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Areas IV, VI, VII and VIII Subarea : 3 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grates understary) fair - - 62.2(63) - Dotal Area (by Hydrologic Soil Croup) 62.2 SUBAREA: 3 TOTAL DRAINAGE AREA: 62.2 Acres WEIGHTED CURVE NUMBER:63 'IR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked• Date: Subtitle: Post-Construction Peak Flows Drainage Areas IV, VI, VII aid VIII Subarea : IV Hydrologic Soil Croup COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 43.2(55) - - - Total Area (by Hydrologic Soil Group) 43.2 SUBAREA: IV TOTAL DRAINAGE AREA: 43.2 Acres WEIGHTED CURVE NUMBER:55 'IR-55 CURVE NUMBER CUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Areas IV, VI, VII and VIII Subarea : 4 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass understory) fair - - 11.9(63) - Total Area (by Hydrologic Soil Group) 11.9 SUBAREA: 4 TOTAL DRAINAGE AREA: 11.9 Acres WEIGHTED CURVE NUMBER:63 TR-55 CURVE NUMBER CCMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Floras Drainage Areas IV,VI, VII and VIII Subarea : VI Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Desert shrub fair 28.5(55) - - - Total Area (by Hydrologic Soil Group) 28.5 SUBAREA: VI TOTAL DRAINAGE AREA: 28.5 Acres WEIGHTED CURVE NUMBER:55 92;0389 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. WeldSanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Areas IV, VI, VII and VIII Subarea : 6 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass understory) fair - - 77.5(63) - Total Area (by Hydrologic Soil Group) 77.5 SUBAREA: 6 TOTAL DRAINAGE AREA: 77.5 Acres WEIGHTED CURVE NUMBER:63 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Veld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Areas IV,VI, VII and VIII Subarea : VII Hydrologic Soil Group COVER DESCRIPTICFI A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Desert shrub fair 39.5(55) - - - Total Area (by Hydrologic Soil Group) 39.5 SUBAREA: VII TOTAL DRAINAGE AREA: 39.5 Acres WEIGHTED CURVE NUMBER:55 • 970289 TR-55 CURVE NUMBER MUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Areas IV, VI, VII and VIII Subarea : 7 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass understory) fair - - 9.3(63) - Total Area (by Hydrologic Soil Group) 9.3 SUBAREA: 7 TOTAL DRAINAGE AREA: 9.3 Acres WEIGHTED CURVE NUMBER:63 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Areas IV,VI, VII and VIII Subarea : VIII Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Desert shrub fair 33.1(55) - - - Total Area (by Hydrologic Soil Group) 33.1 SUBAREA: VIII TOTAL DRAINAGE AREA: 33.1 Acres WEIGHTED CURVE NUMBER:55 920389 TR-55 CURVE NUMBER CCMPL=TON VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Areas IV, VI, VII and VIII Subarea : 8 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass understory) fair - - 10.1(63) - Total Area (by Hydrologic Soil Group) 10.1 SUBAREA: 8 TOTAL DRAINAGE AREA: 10.1 Acres WEIGHTED CURVE NUMBER:63 9Z,0389 TR-55 TABULAR DISCHARGE METHOD VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 C7amty : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Area ED-1 Total watershed area: 1.655 sq mi Rainfall type: II Frequency: 100 years Subareas 9 IX 10 X 11 XII ED-1A ED-1 Area(sq mi) 0.05* 0.21* 0.03* 0.12* 0.21* 0.32* 0.42* 0.29* Rainfall(in) 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 Curve number 63* 55* 63* 55* 63* 55* 55* 55* Runoff(in) 0.81 0.45 0.81 0.45 0.81 0.45 0.45 0.45 To (hrs) 0.77 0.34 0.66 0.26 0.57 0.39 1.28* 0.54 (Used) 0.75 0.40 0.75 0.30 0.50 0.40 1.25 0.50 TimeToOutlet 0.84 0.53 0.78 0.53 0.91 0.53 0.53 0.00 (Used) 0.75 0.50 0.75 0.50 1.00 0.50 0.50 0.00 Ia/P 0.31 0.43 0.31 0.43 0.31 0.43 0.43 0.43 Time Total Subarea Contribution to Total Flow (cfs) (hr) Flow 9 IX 10 X 11 XII ED-1A ED-1 12.1 3 0 0 0 0 0 0 0 3 12.2 9 0 0 0 0 0 0 0 9 12.3 22 0 0 0 0 0 0 0 22 12.4 39 0 1 0 2 0 2 0 34 12.5 56 0 5 0 6 0 7 0 38P 12.6 74 0 10 0 10 0 16 1 37 12.7 92 1 17 0 14 1 26 2 31 12.8 108 2 22 1 15P 4 34 4 26 13.0 129 6 24P 3 13 16 37P 11 19 13.2 145 9 20 5 10 35 30 20 16 13.4 152P 11P 15 6P 7 49P 23 28 13 13.6 142 10 12 5 6 48 18 31P 12 13.8 124 8 10 5 5 40 15 31 10 14.0 106 7 8 4 5 30 13 29 10 14.3 83 5 7 3 4 20 11 24 9 14.6 69 4 6 2 4 15 10 20 8 15.0 57 3 6 2 3 11 9 16 7 15.5 48 2 5 1 3 9 8 13 7 16.0 43 2 5 1 3 8 7 11 6 16.5 38 2 4 1 2 7 7 10 5 17.0 36 2 4 1 2 7 6 9 5 17.5 33 1 4 1 2 6 6 8 5 18.0 31 1 4 1 2 5 5 8 5 19.0 28 1 3 1 2 5 5 7 4 20.0 25 1 3 1 2 4 4 6 4 22.0 19 1 2 0 1 3 4 5 3 26.0 1 0 0 0 0 0 0 1 0 P - rook Flaw * - value(s) provided from TR-55 system routines 92O399 TR-55 CURVE NUMBER MUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Area ED-1 Subarea : 9 Hydrologic Soil Group COVER DE SC RIPTICtI A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass urderstory) fair - - 32.2(63) - Total Area (by Hydrologic Soil Group) 32.2 SUBAREA: 9 TOTAL DRAINAGE AREA: 32.2 Acres WEIGHTED CURVE NUMBER:63 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Area ED-1 Subarea : IX Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 135(55) - - - Total Area (by Hydrologic Soil Group) 135 SUBAREA: IX TOTAL DRAINAGE AREA: 135 Acres WEIGHTED CURVE NUMBER:55 920389 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Chedced: Date: Subtitle: Post-Construction Peak Flows Drainage Area ED-1 Subarea : 10 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass urxlerstory) fair - - 17.2(63) - Total Area (by Hydrologic Soil Croup) 17.2 SUBAREA: 10 TOTAL D AINAGE AREA: 17.2 Acres WEIGHTED CURVE NUMBER:63 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 COunty : Weld State: CO Ciedced: Date: Subtitle: Post-Construction Peak Flows Drainage Area ED-1 Subarea : X Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Desert shrub fair 79.0(55) - - - Total Area (by Hydrologic Soil Group) 79 SUBAREA: X TOTAL DRAINAGE AREA: 79 Acres WEIGHTED CURVE NUMBER:55 90389 T -55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Area ED-1 Subarea : 11 Hydrologic Soil Group COVER DFSCRIPPICN A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass understory) fair - - 134(63) - Total Area (by Hydrologic Soil Group) 134 SUBAREA: 11 'IUTAL DRAINAGE AREA: 134 Acres WEIGHTED CURVE NUMBER:63 IR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Area ED-1 Subarea : XII Hydrologic Soil Group COVER DES( IPTIC N A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Desert shrub fair 208(55) - - - Total Area (by Hydrologic Soil Group) 208 SUBAREA: XII TOTAL DRAINAGE AREA: 208 Acres WEIGHTED CURVE NUMBER:55 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Area ED-1 Subarea : ED-1A Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RAND Desert shrub fair 269(55) - - - Total Area (by Hydrologic Soil Group) 269 SUBAREA: ED-1A TOTAL DRAINAGE AREA: 269 Acres WEIGHTED CURVE NUMBER:55 TR-55 CURVE NUMBER C14PU2ATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 Canty : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Area ED-1 Subarea : ED-1 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 185(55) - - - Total Area (by Hydrologic Soil Grasp) 185 SUBAREA: ED-1 TOTAL DRAINAGE AREA: 185 Acres WEIGHTED CURVE NUMBER:55 920359 TR-55 TO and Tt THRU SUBAREA COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Area ED-1 Subarea ED-1A Flow Type 2 year Length Sloe Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (s9/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .007 E 0.755 Shallow Concent'd 900 .014 U 0.131 Open Channel 2300 4.2 0.152 Open Charnel 3500 4 0.243 Time of Concentration = 1.28* — Sheet Flow Surface Codes — A Smooth Surface F Grass, Dense — Shallow Concentrated — B Fallow (No Res.) G Grass, Burnuda — Surface Codes — C Cultivated < 20 % Res. H Woods, Light P Paved D Cultivated > 20 % Res. I Woods, Dense U Unpaved E Grass Range, Short * - Generated for use by TABULAR method 920383 18-55 TABULAR DISCHARGE METHOD VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked• Date: Subtitle: Post-Construction Peak Flaws Drainage Areas B13, B14 and ED-2 Total watershed area: 2.304 mini Rainfall type: II Frequency: 100 years Subareas 12 XIII 13 XV B13 Area(sqmi) 0.09* 0.02* 0.01* 0.21* 0.94* Rainfall(in) 3.8 3.8 3.8 3.8 3.8 Ozve number 63* 55* 63* 55* 55* Runoff(in) 0.81 0.45 0.81 0.45 0.45 To (hrs) 0.70 0.08 0.66 0.41 1.19* (Used) 0.50 0.10 0.50 0.50 1.25 TimeltOutlet 1.35 1.27 1.27 0.88 0.30 (Used) 1.50 1.00 1.50 0.75 0.20 Ia/P 0.31 0.43 0.31 0.43 0.43 Time Total Subarea Contribution to Total Flaw (cfs) (hr) Flow 12 XIII 13 XV B13 12.1 0 0 0 0 0 0 12.2 2 0 0 0 0 0 12.3 10 0 0 0 0 0 12.4 28 0 0 0 0 3 12.5 56 0 0 0 1 6 12.6 93 0 0 0 3 13 12.7 127 0 1 0 6 22 12.8 155 0 2P 0 10 33 13.0 176 0 2 0 17 55 13.2 178P 2 2 0 20P 70 13.4 171 7 2 1 19 73P 13.6 159 13 1 2 16 68 13.8 146 18 1 3P 13 60 14.0 132 19P 1 3 10 53 14.3 110 15 1 3 8 44 14.6 92 11 1 2 7 38 15.0 75 7 1 1 6 32 15.5 64 5 1 1 5 26 16.0 57 4 0 1 5 23 16.5 51 3 0 1 4 21 17.0 47 3 0 1 4 19 17.5 44 3 0 0 4 18 18.0 42 3 0 0 4 17 19.0 36 2 0 0 3 15 20.0 33 2 0 0 3 14 22.0 25 1 0 0 2 11 26.0 2 1 0 0 0 1 P - Peak Flaw * - value(s) provided from TR-55 system routines 9203&3 TR-55 TABULAR DISCHARGE METHOD VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Areas B13, 814 and ED-2 Continuation of subarea information Subareas 15 XIV B14 ED-2 14 Area(sq mi) 0.03* 0.08* 0.52* 0.38* 0.02* Rainfall(in) 3.8 3.8 3.8 3.8 3.8 Curve number 63* 55* 55* 55* 63* Runoff(in) 0.81 0.45 0.45 0.45 0.81 TO (hrs) 0.46 0.11 0.48 0.86* 0.40 (Used) 0.40 0.10 0.50 0.75 0.40 TimeTcOutlet 0.88 0.77 0.30 0.00 1.27 (Used) 1.00 0.75 0.30 0.00 1.50 Ia/P 0.31 0.43 0.43 0.43 0.31 Time Subarea Contribution to Total Flow (cfs) (hr) 15 XIV B14 ED-2 14 12.1 0 0 0 0 0 12.2 0 0 0 2 0 12.3 0 1 2 7 0 12.4 0 3 6 16 0 12.5 0 5 18 26 0 12.6 0 8 34 35 0 12.7 0 9 49 40 0 12.8 1 10P 58P 41P 0 13.0 3 9 56 34 0 13.2 5 7 44 27 1 13.4 6P 5 34 22 2 13.6 5 4 28 19 3 13.8 4 3 23 17 4P 14.0 3 3 21 15 4 14.3 2 3 18 13 3 14.6 2 2 16 11 2 15.0 1 2 14 10 1 15.5 1 2 13 9 1 16.0 1 2 12 8 1 16.5 1 2 10 8 1 17.0 1 1 10 7 1 17.5 1 1 9 7 1 18.0 1 1 9 6 1 19.0 1 1 8 6 0 20.0 1 1 7 5 0 22.0 0 1 6 4 0 26.0 0 0 0 0 0 P - Peak Flow * - value(s) provided from TR-55 system routines 9,1Psn TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill Uses: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Areas B13, B14 and ED-2 Subarea : 12 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CZ) ARID AND SEMIARID RANGELANDS Sagebrush (wf grass hmderstory) fair - - 56.6(63) - Tbtal Area (by Hydrologic Soil Group) 56.6 SUBAREA: 12 TOTAL DRAINAGE AREA: 56.6 Acres WEIGHTED CURVE NUMBER:63 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Areas B13, B14 and ED-2 Subarea : XIII Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Desert shrub fair 12.9(55) - - - Tbtal Area (by Hydrologic Soil Group) 12.9 SUBAREA: XIII TOTAL DRAINAGE AREA: 12.9 Acres WEIGHTED CURVE NUMBER:55 920389 TR-55 CURVE NUMBER C MPUPATICN VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Canstruction Peak Flows Drainage Areas B13, B14 and ED-2 Subarea : 13 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass to erstaoy) fair - - 9.4(63) - Total Area (by Hydrologic Soil Group) 9.4 SUBAREA: 13 'It/PAL DRAINAGE AREA: 9.4 Acres WEIGHTED CURVE NUMBER:63 TR-55 CURVE NUMBER CQ4PUTATION VERSION 1.11 Project : E. Weld Sanitary landfill User: GB Date: 01-22-92 • Canty : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Areas B13, B14 and ED-2 Subarea : XV Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 133(55) - - - Total Area (by Hydrologic Soil Group) 133 SUBAREA: XV TOTAL DRAINAGE AREA: 133 Acres WEIGHTED CURVE NUMBER:55 920389 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 Canty : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Areas 813, 814 and ED-2 Subarea : 813 Hydrologic Soil GroupCOVER DESCTICN A D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 604(55) - - - Total Area (by Hydrologic Soil Group) 604 SUBAREA: 813 TOTAL DRAINAGE AREA: 604 Acres WEIGHTED CURVE NUMBER:55 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Areas 813, B14 and ED-2 Subarea : 15 Hydrologic Soil Group COVER DESC2IPTICN A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass unierstory) fair - - 16.2(63) - Total Area (by Hydrologic Soil Group) 16.2 SUBAREA: 15 TOTAL DRAINAGE AREA: 16.2 Acres WEIGHTED CURVE NUMBER:63 920383 TR-55 CURVE NUMBER CCMPUTATTON VERSION 1.11 Project : E. Weld Sanitary Landfill near: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Areas B13, B14 and ED-2 Subarea : XIV Hydrologic Soil croup COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 51.4(55) - - - Total Area (by Hydrologic Soil Group) 51.4 SUBAREA,: XIV IVIAL DRAINAGE AREA: 51.4 Acres WEIGHTED CURVE NUMBER:55 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flaws Drainage Areas B13, B14 and ED-2 Subarea : B14 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Desert shrub fair 335(55) - - - Total Area (by Hydrologic Soil Group) 335 SUBAREA: B14 TOTAL DRAINAGE AREA: 335 Acres WEIGHTED CURVE NUMBER:55 90299 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Areas B13, B14 and ED-2 Subarea : ED-2 Hydrologic Soil Grwp COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 244(55) - - - Total Area (by Hydrologic Soil Group) 244 SUBAREA: ED-2 TOTAL DRAINAGE AREA: 244 Acres WIIQIrED CURVE NUMBER:55 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked• Date: Subtitle: Post-Cnstruction Peak Flows Drainage Areas B13, B14 and ED-2 Subarea : 14 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass urdersta y) fair - - 12.1(63) - Tbtal Area (by Hydrologic Soil Group) 12.1 SUBAREA: 14 TOTAL DRAINAGE AREA: 12.1 Acres WEIGHTED CURVE NUMBER:63 92O389 TR-55 Tc and Tt THRU SUBAREA COMPUTATION VERSION 1.11 Project : E. Weld Sanitary Landfill User: GB Date: 01-22-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Floras Drainage Areas B13, B14 and EO-2 Subarea B13 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (s4/ft) (ft) (ft/sec) (1w) Sheet 1.8 300 .03 E 0.422 Shallow Concerht'd 1050 .017 U 0.139 Open Charnel 600 5 0.033 Open Channel 8600 4 0.597 Time of Concentration = 1.19* Subarea EO-2 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) at (sg/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .1 E 0.261 Shallow Conoent'd 1600 .006 U 0.356 Open Channel 2700 5 0.150 Open Channel 1300 4 0.090 Time of Concentration = 0.86* — Sheet Flow Surface Codes — A Smooth Surface F Grass, Dense — Shallow Concentrated — B Fallow (No Res.) G Grass, Burmuda — Surface Codes — C Cultivated < 20 % Res. H Woods, Light P Paved D Cultivated > 20 % Res. I Woods, Dense U Unpaved E Grass Range, Short * - Generated far use by TABULAR method 9. :0383 TR-55 TABULAR DISCHAR E METHOD VERSION 1.11 Project : East Weld Sanitary Landfill hear: GB Date: 01-24-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Basins 16, 17 and ED-2 Total watershed area: 0.755 sq mi Rainfall type: II Frequency: 100 years Subareas 16 XVI 17 XVII 817 Area(sq mi) 0.01* 0.08* 0.06* 0.17* 0.44* Rainfall(in) 3.8 3.8 3.8 3.8 3.8 Curve number 63* 55* 63* 55* 55* Runoff(in) 0.81 0.45 0.81 0.45 0.45 Tc (his) 0.28 0.17 0.54 0.36 0.86* (Used) 0.30 0.20 0.50 0.40 0.75 TimeTaOutlet 0.48 0.32 0.67 0.32 0.00 (Used) 0.50 0.30 0.75 0.30 0.00 Ia/P 0.31 0.43 0.31 0.43 0.43 Time Total Subarea Contribution to Total Flora (cfs) (hr) Flow 16 XVI 17 XVII B17 12.1 0 0 0 0 0 0 12.2 4 0 2 0 0 2 12.3 15 0 6 0 1 8 12.4 34 0 11 0 5 18 12.5 55 1 12P 1 11 30 12.6 71 1 11 2 17 40 12.7 81 2P 9 4 21P 45 12.8 85P 2 8 7 21 47P 13.0 74 1 5 12 17 39 13.2 62 1 4 13P 13 31 13.4 53 1 4 12 10 26 13.6 42 0 3 9 8 22 13.8 36 0 3 7 7 19 14.0 31 0 3 5 6 17 14.3 27 0 2 4 6 15 14.6 23 0 2 3 5 13 15.0 21 0 2 3 5 11 15.5 18 0 2 2 4 10 16.0 18 0 2 2 4 10 16.5 16 0 2 2 3 9 17.0 14 0 1 2 3 8 17.5 13 0 1 1 3 8 18.0 12 0 1 1 3 7 19.0 12 0 1 1 3 7 20.0 10 0 1 1 2 6 22.0 9 0 1 1 2 5 26.0 0 0 0 0 0 0 P - Peak Flaw * - value(s) provided from TR-55 system routines 9;T:O389 'ZR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : East Weld Sanitary Landfill User: GB Date: 01-24-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Basins 16, 17 and ED-2 Subarea : 16 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrudh (w/ grass urterstory) fair - - 3.5(63) - Total Area (by Hydrologic Soil Group) 3.5 SUBAREA: 16 TOTAL DRAINAGE AREA,: 3.5 Acres WEIGHTED CURVE NUMBER:63 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : Fast Weld Sanitary Landfill User: GB Date: 01-24-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Basins 16, 17 and ED-2 Subarea : XVI Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (IN) ARID AND SEMIARID RANGELANDS Desert shrub fair 52.3(55) - - - Tbtal Area (by Hydrologic Soil Group) 52.3 SUBAREA: XVI 'NIPS, DRAINAGE AREA: 52.3 Acres WEIGHTED CURVE NUMBER:55 9. 29 TR-55 CURVE NUMBER OQ4PUTATI0N VERSION 1.11 Project : East Weld Sanitary Landfill User: GB Date: 01-24-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Basins 16, 17 and ED-2 Subarea : 17 Hydrologic Soil Group DOVER DESCRIPITCN A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (W/ grass understo y) fair - - 35.6(63) - Total Area (by Hydrologic Soil Group) 35.6 SUBAREA: 17 TOTAL DRAINAGE AREA: 35.6 Acres WEIGHTED CURVE NUMBER:63 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : East Weld Sanitary Landfill User: GB Date: 01-24-92 COunty : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Basins 16, 17 and ED-2 Subarea : XVII Hydrologic Soil Group COVER DESCRIPTION • A B C D Acres (CN) ARID AND SEMIARID RAC Desert shrub fair 112(55) - - - Total Area (by Hydrologic Soil Group) 112 SUBAREA: XVII TOTAL DRAINAGE AREA,: 112 Acres WEIGHTED CURVE NUMBER:55 9.1)✓89 ZR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : Fast Weld Sanitary Landfill User: GB Date: 01-24-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Basins 16, 17 and ED-2 Subarea : B17 Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 280(55) - - - Total Area (by Hydrologic Soil Group) 280 SUBAREA: B17 TOThL DRAINAGE AREA: 280 Acres WEIGHTED CURVE NUMBER:55 9`0389 TR-55 To and Tt !XH 4J SUBAREA COMPUTATION VERSION 1.11 Project : East Weld Sanitary Landfill User: GB Date: 01-24-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Peak Flows Drainage Basins 16, 17 and ED-2 Subarea B17 Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (s4/ft) (ft) (ft/sec) (hr) Sheet 1.8 300 .06 E 0.320 Shallow Ci tent'd 850 .012 U 0.134 Open Channel 1400 5.5 0.071 Open channel 6100 5 0.339 Time of Concentration = 0.86* — Sheet Flow Surface Codes --- A Smooth Surface F Grass, Dense — Shallow Concentrated — B Fallow (No Res.) G Grass, Burnuda — Surface Codes — C Cultivated < 20 % Res. H Woods, Light P Paved D Cultivated > 20 % Res. I Woods, Dense U Unpaved E Cass Range, Short * - Generated for use by TABULAR method 9 "x389 TR-55 TABULAR DISCHARGE METHOD VERSION 1.11 Project : East Weld Sanitary Landfill User: GB Date: 01-24-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Flows Drainage Area XVIII Total watershed area: 1.147 sq mi Rainfall type: II Frequency: 100 years Subareas 18 XVIII Area(sqmi) 0.12* 1.02* Rainfall(in) 3.8 3.8 Curve number 63* 55* Runoff(in) 0.81 0.45 To (hrs) 0.80 2.12* (Used) 1.00 0.30 Time1bOutlet 1.25 0.00 (Used) 1.00 0.20 Ia/P 0.31 0.43 Time Total Subarea Contribution to Tbtal Flow (cfs) (hr) Flow 18 XVIII 12.1 5 0 5 12.2 25 0 25 12.3 74 0 74 12.4 128 0 128 12.5 146P 0 146P 12.6 134 0 134 12.7 114 0 114 12.8 95 0 95 13.0 70 2 68 13.2 58 5 53 13.4 56 11 45 13.6 58 18 40 13.8 59 22 37 14.0 57 23P 34 14.3 50 20 30 14.6 42 15 27 15.0 36 11 25 15.5 30 7 23 16.0 27 6 21 16.5 24 5 19 17.0 22 4 18 17.5 21 4 17 18.0 21 4 17 19.0 18 3 15 20.0 16 3 13 22.0 14 2 12 26.0 1 1 0 P - Peak Flow * - value(s) provided from TR-55 system routines 92'0289 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : East Weld Sanitary Landfill User: GB Date: 01-24-92 County : Weld State: CO Checked: Date: Subtitle: Post-Construction Flows Drainage Area XVIII Subarea : 18 COVER DESCRIPTION A Hydrologic Soil Group Acres (CN) ARID AND SEMIARID RANGELANDS Sagebrush (w/ grass unaerstory) fair - - 79.8(63) - Total Area (by Hydrologic Soil Group) 79.8 SUBAREA: 18 TOTAL DRAINAGE AREA: 79.8 Acres WEIGH'T'ED CURVE NUMBER:63 TR-55 CURVE NUMBER COMPUTATION VERSION 1.11 Project : Fast Weld Sanitary Landfill User: GB Date: 01-24-92 County : Weld State: CO Checked: _ Date: Subtitle: Post-Construction Flows Drainage Area XVIII Subarea : NVIII Hydrologic Soil Group COVER DESCRIPTION A B C D Acres (CN) ARID AND SEMIARID RANGELANDS Desert shrub fair 654(55) - - - Total Area (by Hydrologic Soil Group) 654 SUBAREA: XVIII TOTAL DRAINAGE AREA: 654 Acres WEIGHTED CURVE NUMBER:55 9 TR-55 To and Tt THRU SUBAREA COMPUTATION VERSION 1.11 Project : East Weld Sanitary Landfill User: GB Date: 01-24-92 County : Weld State: CO Checked: _ Date: Subtitle: Post-Construction Flows Drainage Area XVIII Subarea XVIII Flow Type 2 year Length Slope Surface n Area Wp Velocity Time rain (ft) (ft/ft) code (s4/ft) (ft) (ft/sec) (1r) Sheet 1.8 300 .006 E 0.803 Shallow Concent'd 300 .006 U 0.067 Open Channel 18000 4 1.250 Time of Concentration = 2.12* — Sheet Flaw Surface Codes — A S nooth Surface F Grass, Dense — Shallow Concentrated — B Fallow (No Res.) G Grass, Bermuda — Surface Codes — C Cultivated < 20 % Res. H Woods, Light P Paved D Cultivated > 20 % Res. I Woods, Dense U Unpaved E Grass Range, Short * - Generated for use by TABULAR method 92O 389 Hello