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Hydraulics Report/Floodplain
REGENO SEP 13 2006 art ■ SILVERBROOK ESTATES HYDRAULICS REPORT FOR THE FLOODPLAIN OF THE STILLWATER RIVER Stillwater River Flathead County, Montana Prepared fog: DEB RoA TA LandWorks Group 10 18 o Cottonwood Road Bozeman, MT '1 Prepared Pj 10 Valley Commons Drive Bozeman, MT 59718 August 20 PB S &J Proj ect No. B2003 6.0 TABLE OF CONTENTS Section 1,0 INTRODUCTION......... he oloamseemmum #�**ii#■■mpass*iris...s4#oes@awomass*a*amsomsef; same @ONE 2.0 FIELDWORK fffafa**iffasff■sham sssfa;.DOME tons sea*#s#.sa w s#..aasomeasRide.i##asasa■..#afas*fae Boom spsebssafar 3.0 HYDROLOGY....... MIDAMMOD86100 on minsomamm*96-gm Mae* Dssy##i*.asfafssfa•aasllaassaf■#�.iarifa##asaasiis 4,0 HYDRAULIC MODELING............... rsss4###iiiisisafsa*#*•iRoss *;#dsoola+#aissffa■ 4 FLO ODPLAIN...........*a#*■ffaffa#bate ones soma##a6#}#aibas*was;aYfas##**#.■##haft f RESULTSsea■ sssass*asses#�fsaaf•�#�*■ssssssas�llssssa*�a•�*#iasses**#*ss#asta;.seas.;•�rf■*• 7.0 SUMMARY4af�sasiif# #*laasfia�!#s.mfaa+E* +f# s.effafffvassGo sesames me0 8.0 REER-EN CS asa.ayMlNoabof#M**ioa0f#9fiiloa**n gem; fi*iiioii\*@*seem same**e\faifm so asomif*d List of Figure,e Figure 1. Vienlity Map .Figure 2. Floodpla n Mappiiag List of Avinendices Appendix A. USGS Stream Flow Data for the Stillwater River near V/bitefish, MT Appendix B. Hydrology Appendix C. EEC-RAS Files 1.0 INTRODUCTION TA Landvors hired Ply SJ to determine the boundaes of the Stillwater River 1 oo-year lloodplain through the proposed Silverbrook Estates develo me rat in Flathead County, Montana. The project is generally located within Section 1 Township 28 ITT Range 22 W as shown on Figure I. This report presents hydrology and hydraulic methodologies, data, and results of the flood lax � study, 2.0 FIELD WORK site visit was performed on June 27, 2006 by Dan March of 1 S& . During this site visit river cross section locations were selected, photographs taken and hydraulic model parameters assessed. Proposed cross section locations were narked on a map and passed along to the project surveyor, F and H Land Surveying, Inc. (PLS)of Whitefish Montana. During the site visit, high water marks in the form of sediment lines on the vegetation were noted. These high water narks were the result of a high flow evert that peaked on June 20, 2006. This information was passed along to F and Land Surveying and elevations documented during their collection of river dross section data. Five channel l oodplain cross -sections weresurveyed as shown on Figure. In addition, F and H Land Surveying produced a two -foot y gp contour map of the entire project area (Figure . All survey data is based on the NAVD88 vertical datum, 390 HYDROLOGY The l 0-year design flow for the Stillwater River at the project site was developed in accordance with Guidelines for Determining Flood Flow Frequency (Revised)", l also no n as "Bullets l'7B (U.S. Interagency "' .Advisory Committee on Water Data, 1982). This was done using the data from the a in g g g station on the Stillwater liver near Witeb, MT (US GS Gaging Station � l 000 (US�S, oo (See Append and then transferring the data to the project location using the gaging transfer method in "'Analysis of the Magnitude and Frequency of Flood and the Peak -Flow Gaging Network in Montan , "' Hydrology computations are presented in Appendix B. 4.0 HYDRAULIC MODELING .hydraulic modeling was completed using the US Arm o of n `veers' River Analysis System IE - AS) (United States Array Corps of Engieers,, oo software. This software was used to perform one-dimensional stead flow rimier h y hydraulics calculations. The software is the industry standard tool for floodplain angysis. U STS .1 Hydr loav Hydrology computations'Yielded the following design flows for the given return intervals (See Appendix : Hydrology): eta Flow Rate at USGS Flow Rate at 1 000 Project Site Interval CS CFS yr 10 1650 yr 2510 2600 10 yr 3130 3240 25 r 3900 4040 o 4470 4625 100 yr 5030 5200 Soo yr 6290 6.2 Hydraulics The following table summarizes the flood elevations computed using the HE- R .S computer model for the Stillwater River at the project site. Cross Water Surface Section Elevation 1 2969.2 2 2969.8 0....+ 2970.9 2971.5 new Floodplain map was developed based on the computed water surface elevations above and the topographic map developed by F and H Land Surveying s shown on Figure 2. Appends : BEC-RAS Files present input/output data from the HE-RAS model. It includes water surface elevations at each surveyed cross section a plot of the water surface profile along the entire model, flow profile plot, and the output table showing grater surface elevations. 7.0 SUMMARY A detailed study of the floodplain of the Stillwater River at the ; ro proposed eet Project site was preformed using the HEC-RAS computer model. This detailed study was based on accurate data provided by licensed surveyors and hydraulic engineers. A floodplain map for the proposed project site is iiacluded as Figure 2. 3 List of Figures FIGURE 1. VICINITY MAP FIGURE 2. FLOODPLAIN MAPPING Silverbrook Estates Hydraulics)?e port forthe Floodplain of the Stillwater River Flathead County, Montana Appendix A USGS STREAM FLOW MEASUREMENTS FOR THE STILLWATER RIVER NEAR WHITEFISH, MONTANA Silverhrook Estates Hydraulics Reportfor the Floodplain of the Stillwater River Flathead County, Montana USGS Real -Time Water Data for t,_T GS 12365000 Stillwater Rive- rear NVhitefish MT Page I of. Water National Water- Information System: Dacia afego.r .: - - .. eoq pa r : .urcesWeb Interface Surface Waterllnta USGS 12365000 Stillwater River near Whitefish MT PROVISIONAL DATA SUBJECT TO .REVISION Available data for this site Tim -- er'e : Daily data This streamgage station is scheduled to be converted to seasonal operations on November 1, 2006. If you are concerned about this channa and interested in providing funding,for this station, please contact Wayne rkas at r roc @,.0 g,,gy, Station operated in cooperation with the Montana Department of Naturai Resources ources and Conservation., Stati- lfrrin WS Flood Stage w 16.0 't. Flood.Trackino for this site. lffl$_River Forecast r thi -Current Conditions i t 1 i ��. _. _ � a p �_.... F1Qocj:-FoQquencv andi CFr T r rt tr _ r this site Gage height, feet L, Output format @`1 Graph . Graph w tats ._.#Graph wmeas Table "-Tab-separated Begin date 00 -04 -01 End date '2006-08-14.' Ll �-y y t t t# rt 't � F+ +m-p-A � L+e, t * r, r, � * n . +.+� , � � is n 1.4-1 r /rah �..-. r. r r+�-. - S S Real -Time ` Water Data r USG 1 tUlwat r River rear Whitefish USGS 12365000 St i l l4a er River near Nhitef ish HT 'age 2 o ID'wO *0 6*0 M Cm cc 4.0 0 Apr 81 Apr 15 Apr 29 May 13 hay 27 Jun 10 Jun 24 Jul 00 Jul 22 Dug 0 2095 200600 OD 2096 2006 2006 2806 2006 200 Provisional Data Subject to Revision Createpresentation-QualilyUanh Pnrameter 000 ; IUD 01 Discharge, cubic feet per second .v_.. USGS 12365900 StMwater Riwer npAr� uh ti #- iml* �h wT 001 10D0 a ■rq 7 i • - r ' 4 � I . i 1 � t 2 t _ - Apr 01 FIpr 15 Apr 29 tlay 13 Hay 27 Jun 10 .Jun 24 Jul 00 ,Jul 22 Bug 0 "PP w.� Provisional Data subject to Revision ---_ C.r P..q f n I- )Ia1 , A Famm a ter 00060; DD 03 Wsiono� dad` `end � t,....:... �- ' .iou bl ors t site no-ft erms SGS Surface --Water ]ail Data for Montane ..._ � �� � ftp://waterdata.usgs.gov/mt/nwis/dv? -1 -I fI V AI ! fi 1'11 i t� T � 3 rt Tl # � i !^I R ! i'► Y1 1 � i - r � r� xf h ...-. � ❑_ �....�t ._. i-� _ # L _! f' . y . r7 7 y .-. . , . - - USGS Real -Time Water Data for USGS 12365000 Stillwater River near Whitefish MT Page 3 of. Retrieved on 00 -0 -1 17:06:15 EDT en rtm ent f the Interior, J� .4 i u = USG Water Resou rc or Mon t n a � mm _ ate pti Disclaimer 11 Access dews Automnted Retrievals 69 nd vOl ♦ `ice■ % t-4 *tiI10S-rr+ r*r%-gr/rr +lin -g -zr -j, ri/ wir9rr i'lnn P,r*1, USGS Real -Time Water Data for US GS" 123 6 5 0 0 0 Sti 11water River near Wlifterlsh MT Page I of National Water InformationAhaterSystemr: 4rai .Area: u Surface Water R ' Montana na web .-_ ,GO USGS 12365000 Stillwater River near Whitefish MT PROVISIONAL DATA SUBJECT TO REVISION Available data for this site Tl e-series: Daily data rGO This streamgage station is scheduled to be converted to seasonal operations on November 1, 2006. If you are concerned about this change and interested in providing funding for this station, please contact Wayne Berkas at wr era @ ,.,g Station operated in cooperation with the Montana rtmont of Natural R r os and Conservation - Station In rm ti n NWS Flood Stage � 16.0 tw ____-. blood. ..... Trackinci for th Is , WS River Forecast Page for this site. ----r Current Conditions ''.... Flood-Freauenc and airy Characteristics for thsite Dutput format 0 Graph ,) Graph w tats 0 Graph w a Coo Table OTab-separated • Gage Stream - height, flaw Date feet (ft3/S) (Mean) (Mean) 104/01/200611 3.342 P 104/02/2 006 3.89P 387 p 04/03/200fl64.22 P 431 P 04/04/2006 4.45 P 468 fl {}4/05/2006 E.83 p11 517 P 04/06/2006 5�24�P-15�� Begin date 0_--0-01 End date 0O --08.1 •/ *"i# U7 re YY TIR+^�/*+1-"%l-wfy ri IArr r.l-. S xS Real -Time Water Data for USGS 12365000 Stillwater River near Whitefish MT Pa ge L 104/07/200616.40 p 756 F 04/08/2006 7.69 p 970 p 104/09/200611 8,64 P 1,140 P 104/10/2006; 9.37 P 1,270 P 104/11"/200611 9.89 �' 115380,11 104112/2006110.18 p 1 1,440 P 04/13/2006 1p.Z1ip 1,440 P 104/14/2 0 0 6 10.02 F 11 1,410 p 104/15/200611 9.80 fli 12360 p 104/16/200611 9.74 p 13350 P 04/I7/2006 9.84 p 15364 p 04/18/2006g,7$ F 13360 p 04/19/2006 19.55 P 1,32� F 104/20/2006] 9.12 �' 113240 � 104/21/200611 8.71 �' 13I60 � 104/22/200611 8.54 P 13130 ' 04/23/20068.74 p 11 13170 1 04/24J2006 9.48 P 1 1,230 1 04/25/20069.39 P 1,290 1 04/26/2005 9.52 p 11 11320 F 04/27/2006 9.52 P L320 p 04/28/2006 9.49 P 13310 p D4/29/2006 9.51 1 12320 P )4/30/2006 9.73 p 1,360 p )5/01/2006 10.14 p 1,450 P }5/02/2006 10.63 P 1,560 p )5/0312006 10.97 p 1,640 P 15/04/2006 11.05 P 1,660 p I5/05/2006 10.79 P 13600 P 15106/2006 10.25 ]' 1,470 p 15/07/2046 9.66 p 11 1,350 p 5/08/200fl69.24 P 1,270 p 5/09I2006 9.04 p 13230 p 5/10i2006 s.�o p a,200P 5i11/20061 IF I #i-rti * t'►1 It r; s't 1119 If n + r%.+A n + n I MN r+ r. n .-r e-. t r I.y.. + I rj -j t" I+ A A � P()-.V- .. A.�..`J_ L,..r f 1 0_ 1_ .. _ : .. -1 t j e11N n r% 1 -1 r- lrti rt r, �M USGS Real -`dime Water Data for USGS 12365000 Stillwater fiver near Whitefish MT Page 3 of t l 8.68 1,Z60 P 1 05/12/2006 8.42 � 1,110 P 105/13/-2006118.19 P L070 P 105/14/2006118.03 P 11 1,040 p 105/15/200611 7.89 p 1,010 P 105/16/200611 7.84 P 1 12040 P 105/17/200611 7.96 p I2020 p 05/18/2006 8.27 1 1,084 P 105/19/20061 5.68 111150 p 05/20/2005 9.15 p 1,230 p 05/21t2006 9.65 13320 P 105/22/200611 9.97 fli 13350 P [0:5/23/200611 9.99 1,390 P [0:5/:2:4,/200611 9.84 1,360 p [05:/:25/20061 9.65 �' 1,320 P 05/26/2006 9.50 1,290 P [05=/27i/200611 9.28 �' 11,240 p 105/28/200611 9.03 fli 1,200 P 05/29/2046 8.76 p 1, 140 P 105/30/20061 8.53 p 13100 p 105/31/20061 8.22 P 12050 P [06/01/200611 7.88 p 985 P =06/02/.2040061[ 7.58 p 931 P 06/03/2006 7.33 p 88$ P 076/04 7 ago � 06/05/2006 7.19 p]1 .862 P 06/06I2006 7.26 P 872 p 06107/200:6 7.36 �' 888 p 05/08/2006 7.44 P 11 940 F a6/09/2006 7.43 p 897 P )6/10/2006 7.48 p 903 P )6/11/200d 7.59 P 1 924 p )6/12/200611 7.50 P 904 p 16/I3/2006 7.30 p 11 870 p 16/14/2006 11 1 US S Real -Time Water Data for USGS 12 3 65000 Still vat r River near Whitefish 11T 'age 4 of i L IL_ 1 7.17 P 845 p 06/15/2006 7.53 p 905 p 06/16/2005 8.05 p 11 991 P EO6/177/2"006119.21 P 12200 � E06/� 8/2QQ6 1 q.91 P 1,54d1 106/19/20061112.04jp[:1,820 � FG/?p/200G 1?.1 l P 1,830 P EO6:/2:1/2006.111.53 P 112680 P [0:67/22 110.66 P 117480 p 06/23/2006 9.73 p E1,2190 p rb/24/2006 g,gg P 1,130 p =06/25/.200611 8.19 P11 1,010 P 106/2 6/20 06 7.66 p 918 p 106/27/200611 7.21 p 844 p =06/28,/2006.1 6.83 p11 781 p 06/29/2006 6.48 � 727 p 106/30/20 066,1g p 679 P 107/01/200611 5.96 p 646 p L07/02/20061 5.9 6 p 07/03/2006 5.74 P 612 P 107/04/2,00611 5.49 p 575 p 07/0s/2006 s.�a � 54s p 07/{}6/2006 5.16 527 P 07I07/2006 5.25 P 541. P 07l08l2005 s.l� � 525 p 07/09/2005 q-.S9 p 489 P 07/10/20Q6 4,70 p 463 p )7/11/2006 4..53 P]l 440 P 37/1212406 14.35 � 416 p )7/13/2046 4.72 p 398 F 17/14/2006 4.08 F 381 P 17/15/2006 3.95 P] 363 7/16/200611 3.83 P11 348 P 7/17/2a05 3.72 p 334 P 7/18/2006 r��� �' r��xr� ����tr�rr���'� �w�rrc� r•xr��r�a-r,t�rw�ari�+���r��� �IC�f�=-}-�.4fr•1-► f'J�If�ll��,�-.1�.�.,.-�...�.�--�-.�-.-.,1�+��-,�-.�;.-. .-�.�+���1� �� c1��r� U GS Real -Time Water Data ;for US S 12365000 Stillwater River rear WUtefish MT Page 5 of 1 113.59 P 31$P 107/19/20061. 3.46 P 302 P [077/20,/2006 3.38 F 292 P 47/21/2006 3.30 P 283 p 07/22/200611 3.22 �' 274 P b7/23/20061 3.17 fli 268 P 07/24/2006 3.12 P 2G2 P 07/25/2006 3.03 p 251 p 071262.96 p 243 P 07/27/2006 2.89 P 235 P 07/28/20062.82 p 2:27 P 07i29i20062.74 !]1 219 p D7/30/2006 2.66 P 210 P D7/31i2006 2.58 P 202 P }8/01/2046 2.57 F JE200 P )8/02 12.55 p 198 P )8/03/2006 2.48 P 191 p )8/04/2006 2.43 p 1$6 P )$l05/200b 2.40 �' 182 P W46/2046 235 p 1 17$ P 18/07/2006 2.34 P 175 P 18/48I200b 2.30 p 172 P 8/09I2006 12.28 P 171 F 8/l 0/2006 2.�� p 168 P 108/11/200611 2„27 P 169 P 08/12/2005 2.30 P 172 n 108/13/200611 Z.?g P 171 p 108/14/200611 2.25 p 167 p Explanation Provisional data subject to revision. Omens To -j. this web site nis J G Su r•f c -water Daily Data for MontanaExp-1—a--n-a--tion �.... - ttp://waterdata.usgs.gov/mtlnwis/dv.? f f'n * //-n'tAri c ixrgfArd eafa Z 7v ryL, rTn-tI Ty7 1,InI-X?i 0 M T-1 Rrr+1-% n n tl 4 A, Fmw-r" n+-I-%+wg,, I A,1% r%,4 A4,,-9 /? r Inn r' I USGS Real -Time Water Data for USGS 12365000 Stillwater River near Whitefish MT Page 6 of Retrieved on 00 0 -I 17:06:58 EDT e rtru1_cqt of the -Interior, U.S.. eoip lc l Survey LJWaterResources gLMgqta .. �. �. PHv4e y t1tenten �� I]I .1.'7'7 r�ud{� 1 sel imer 11 Access�l�illt t �� � �� I ��� �� Automated Retrievals Is ffT% T"I T7Q Al I M f FWA1 af03 11clrrCl rr^1r/t'Mt/T-1-t-1TtiC+I 'sl 9 r+b 1a'Z rr,� J-% fl A n K n -I, r r �-rran4-i-► .v�� � r-x�-.ors r �'n n l USGS Site Map for USGS 12365000 Stillwater River rear %itefish MT Page T of WaterNational Water Information System: ata ateg.r:,.......__ t rev rqI ..... rc !'Site Information ' Montana � � 0 Site Map for Montana USGS 12365000 Stillwater River near Whitefish MT Available data for this site Site mad _... R......_..__" `fathead County, Montana - + HYdrologic Emit Code 1701021 Latitude ° 1 ' ", Longitude 11 ° ' 11 " NAD2 Drainage area 556.00 square des Page dam 2,953.26 Feet above sea level NGVD29 Location of the site In Montana. Site map. 't "%i7P•!t''?P 'for V,V, y� a}�.. r.'s l •7 5 ,� r7 Mimi Y5 7r' R' S is S �•l ' .. F. J �r � •+� ..� �«� �. e •� �f LPG= �� { � � � _ w It w 4 4r a i�f._ •i�` r �'` ���,y�,�� r �+' � � � _ ir�_ 4F �ti �.+c.• #ice � '� �-�•'� f +15 � ��� � •'�.. rL }: s� t,} + k6 -a • *„+�T*L' Sri` `•!, f . i V. Ln4 c t• 'Lir x k 4 .y' '+ us tt n USGS St tion Fir T � Ott +. 4• 7P •' 4 I i 1 4 1[400M IN 2X, 4X, 5X,,aX, Or ZOOM OUT 2X, 4X. 6X. 8X Maps are generated by US CcususBureau TIGER -Mapr--e. Nfts- —fiQ n aAb-0v1--,dAt,-q.? P.eedback on-1 5-W-T.-b site 7-7`-Site Inventory for Montana: Site Map. aterda n.usgs.gov/mt/n i n lsm 'Lietrieved on 00 -D --1 17: : EDP' MePPIJMIP21jt Of file Interior, U., l g�c I q -GgQISGS Water Respurces of Montana Tot) j�xplanafion term ti , • ,� r C+ � r r +� ` � � n n r rrx l � : * 1, z r+ rr3 f+ ; # rw r► 1 0)j) j) � .. .•. .•.. � , A -T I r:+, SGS Site Map for US S 12365000 Stillwater River rear Whitefish MT Privacy hatent fit ffisclahner Ac-c-e-s-s ib Ijty F' ,1 A I Ngvvas I I igLpm ted� -ri d 1.37 1.37 nad �vOl - ��.�R. _... �... 'age 2 of `ir►'f -n-1-1 ` v xuatrmrr4rafn -i,PnrTo rrr Ott/� +/n-tsr;C.IV%-tsFyr*"nT-k r+;+Am A-T TC' C' Innn Page 1 -of ] L clm cl 7 I v ry-% r Ir. y . rw rn + ,^ r /9 A -' r i 11 f l l � l n #� A 0 '3 1 O D CD �l D� � �, w, . ,r. 1 .t 7 O'7' -Il o�.t_1 f1l1 jr11 USGS Surface- Wafer for Montana: Peak Streamflow Page 1 of 01 Water National Water Information System: Data Categary� _ Geographlc,Arear urces Web Interface 'Surface Water Montana . Y. E r o Peak Streamflow for Montana USGS 12365000 Stillwater River near Whitefish MT _-- + Available �a a for this site Surface-wat r: + Peak tr amflo� 1GO Flathead County, Montana yroloe Unit Code 17010210 Latitude 8° 19'08", Longitude 114'23' 11 " NAD 7 Drainage area 556.00 square miles Sage datum 2,953.26 feet above sea level NGD Water Year ��e 1931 May 09,1931 1932 May 17, 193 1933 Jun. 3, 1933 1934 Apr. 28, 193 1935 May 26, 1935 1936 Apr. 28,1936 1937 May 10, 1937 1938 May 30, 1938 1939 Jul. 07, 1939 1940 May 16, 19 0 191 May 0 8, 1941 1942 May 31, 194 1943 Apr. 2, 1943 1944 My 23,1 1945 May 18, 194 196 May 1, 196 197 May 12, 1947 198 May 26,198 199 May 17, 199 1950 May 19, 1950 1964 Jtn. 09,, 1964 1973 May 22, 173 1974 May 11, 197 Gage Stream - Height flow (feet) WS) 6.17 85 11.54 1,93 11.63 13950 14.7 2fi40 12.49 2J70 10-70 1.175 7.79 1.14 8.67 12280 8.7'5 11300 5.62 688 3.81 408 9.63 1,7 1.79 2,61 3.56 345 7.27 948 11.9 1,710 17.22 31200 0.90 4,330 216501 15.57 21700 1.98 1,8 8..1 88 15.78 2D650 Output formats (Table � I.Graph. Tab-separatec! ale WATSTQRE formatted Me Reselect_o utput_ farrna t Water Date Year 1979 May 10, 199 1980 May o, 1980 1981 May 27, 1981 1982 May 29, 1982 1983 May 30, 1983 1984 Jun. 5, 198{4 1985 Apr. 20, 198 1986 May 09, 1986 1987 May 04,, 1987 1988 Apr. 21, 1988 1989 May 1, 1989 1990 Jun.05,1990 1991 May 22, 1991 1992 Apr. 21, 199 1993 May 19, 1993 1994 Apr. 24,1994 1995 Jun. 257 1995 1996 Apr. 14, 1996 1997 May 18, 1997 1998 Jun. 01, 1998 1999 May 29,1999 2000 Apr. 25, 2000 2001 May 02,2001 02 May 26, 2002 Gage Stream - Height flow (feet) es 13. 5 1,940 1 -78 12300 1 .33 12660 13.70 13940 10.98 1,1450 8.15 91 1.16 1,8 10.20 1,3 0 10.33 15320 7.79 89 12.74 13870 15.62 25560 15.96 23950 5.74 598 9.8 1:8 9.66 1,6 11.66 1269 18.6 3,68 20.20 4,57 10.87 11460 10.61 1,3 10.94 13480 6.66 734 12-72 21010 ti 0 %i rr,+at•x- n� rr . r �+rxr+ rrr►19 r 11r-e.#- %.-►�, r+ �+ /vmr."I . Q1 F) #2 SGS Surface Water for Montana: Peals Streamflow Page 2 of Z 195 May 21, 1975 13-04 r 1976 May 15, 1976 14.60 1977 1978 May 14,1977 May 26, 1978 5.4 12.22 } Peals Stroarlow Qualification Codes. 12940 2003 Apr. 27, 2003 6.23711 25330 2004 Apr. 11, 2004 7. 5 8961 50 2005 Jun.11,2005 8.68 12090 L680 w 1 -- Discharge is a Maximum Daily Average Questions..010-ut-data9 Top Feedback ont1li � site E4• Surface water for Montana: Pak treamflo_of terms http,.-//waterdata.usgs.gov/mt/nwis/pelllc? Retrieved on 00 -o94 17:08:52 EDT e artment of the fnterior. -U. . Geological Syry USGS-Vater resources of Mantana .... Pri a y t em nt 11 Disclaimer taimer 11 a sibiii Q11 Views Autom ted I etrie a 1.4 1.4 nadwwol L. t /1M 191 Til C* 11 rr3+j3j-rj n + " , . r, 9'r91T rTr.-.IT r ,-.-. - ., s, r: r, Appendix B HYDROLOGY Silverbrook EstatesHydraulics Reportfor the Floodplain of the Stillwater River Flathead County, Montana L Stillwater River USGS Regression Equations (Methods for EstIrnatrng Flood Frequency In Montana based on Data through Water Year 1998, WRI R 0 -4305 Gage Transfer T,u"'4T,e(DALj/DAc}APT T,u-The T year Mood at the engaged site (cfs) T,o =The T year flow at the gaged site (cfs) DAu=Drainage area at the engaged site rni DAo=Drainage area at the gaged site I } expT_regression coefficient for a simple OLS regression relatingthe log of T- ear flood t g o log of drainage area within each region (see Table 13 page 4 Equation for West Legion ,U,-T,G DAU/IDA 0.851 Q5,U=QT,a DAu/ Ae O.Bte 1 [}, QT,G DALj/DAe (3,798 Q 5,U 'QT,G DACj/[)AG 0.775 Q50,U=QT, DAu/DAo 11.761 Q100iU` T,o DAulDA 0.747 0D,Ur QT,s DAuJDAe -0.734 QBIIO,uT,oDAuDAo.7 17 Region = Hest IAu= 548 mi4 DA = 524 i' DAu/DAc= 1.05 Ratio should be between 0.5 and 1.5 otherwise this method is unreliable Gaging Station 12365000 Stillwater river near Whitefish Q2,c� 1 500 cfs Q5,o= 2510 cfs Q10,e= 3130 cfs Q,c` 3000 cfs SO,e�- 4470 cfs I CIQ.G," 5030 cfs 00, ' 5580 cfs Q500, " 6290 cfs Q,11" 1 6 52 cfs Q5,u` 2604 cfs Q1O,U= 84 cfs s,u- 4038 cfs 50,u` 4625 cfs Q10D.U= 5201 cfs Q1)0,u= 588 cfs Q51)01u= 6405 cfs .................................. ........,..—.. M,.rtt.,...t,.1,fw.... *+.-...t..w.i.......r... ...w.t..,..,,..r..,..rit.... . f..l4*..........i..,.,.,...... i-*. ........ P. ... W-.t .,,y..z.ttf.a--.,.,.- .,. i. . t � ..r....................................................... ..,..r.,.,............,r......... .....,,.,.r.......................r........ greet h m be r r.......r...,.......rr.... ,,,.... r, ,... ,.... r .... C)�-- !0 wV, rActTv\l t„�,� �v� a- W Appendix C HEC-RAS FILES Silverbrook Estates HydraulicsReportfor the Floodplain of the StillwaterRiver Flathead County, Montana 1-iEDRA5 Plan: Plan U4 River. St1Ilwater River ends, SIIYerbtcnke Pr�61 Iobi '-Rhl - ,_Ptaflle 7 1�+1iri Ih i 1N.I;lev ._.. �. -.m. ,..,.�- ,.'. �... .__. ...�..�_ EILVV _ w s -FiCG =Eiev i= 1 �-. '.�uil R4 A ' � Tap lr�l E � �Fr�niciea w .r :.: _- .�. �._..:. � .:� �..� ���- : :� . `, _ I is � s Cm I w # liv r'oaks S :.. :. 1 .yr � ai.aa 40,Bi . 971.45 •......... .51� �.ppla�Ei6 � .97 2063.59 2.5# �.13 tSjly TaQka QO�yr. .. 2Of.0 2950.92 970,a6 1 70. i3.C}I�0 73 .47 13.7 �al� 14 0.13 S Oi. l 9AE�,01 970.5a 57.20 970.09 0.000297 E 311.54 .454.E � 0,13 5201.00 2946ESA3 2GE9.115 0.0=16 �..48 32M.34 593.137 0.11 5 01.DDI . 5.01 59 4 2a55.119 2959. 7 a.M01 07 .8 _ 31 ,69 0.15 tillwater River Plan: Plarl OS E1/17/ 000 .07 — .. 010 .07 3000 299D 98 0- 970 2960 ;: 295Q_ 2 94 0- -1200 -1000 -600 -600 -400 -200 0 200� 60 600 801 Station (ft) St! lfwater R We Plan Man 05 8 171 00 301 0 � .07 3 �70 D 2090 OB 0 m 2070 960_ 9501- -Toni Station eft) . Stillwater R Ive r- flan: Plan 05 8 17/ 0 06 ... - .07 Legend EG IDa-yr VVs i 00-yr Ground W Bank to Legend EG 10 yr s 't 0 0 r Ground Bank 5ta 3010 Legend 3000. 10 0 -yr 2 99 0- , WS 1 0 0 err 90 Ground 2970± Levee 2960 = Sank ,eta 2950 29 0 -1200 -160❑ -800 -500 --400 -200 0 200 400 600 a00 Station (n) Stillwater River Plan: Plan 05 El/ 171 00 n 3 010 3000- 2 29 0- 29�D ID 07 0 2960 2950 2940 -15 0 0 3040 y 3 02 iA 2 98 2960 2940 -5 0 0 F-ond 0-�yr VVS h00-yr Ground a Bank Sta -1000 -500 0 SOD 1 000 1300 IS to tton (ft Stillwater Fier Plan: Plan 05 8/ 17 OD6 .07 .07 I 5 Logo o EG 9 0❑- r y1 Y Y 1 D y Ground Sanii t9 �1000 -500 0 500 1000' 1500 Station 00 . • := AM 80 9 Stillwater River Plan: Mart 00 17r 006 SUIlwater fiver herbroeke _ L a{'; L' i,� ; �-ir LL7�y,LL`:eT. j4si':'.'a�.-L.�y'. .y Y�•".-,--- ,-s:-;+"-,.- .�--� _1+- ,:�;"4, t*!',.r.i. [: rA';jy'h_:''' _:''''4-'y ,,-,: ,-,-7,., sky- k:.,�, k�-- r - 1 Y - '. :..,5 ,- -;i_ "i f +L.rwA, `! 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'-'�: s' - - , _'.i:A r"_I - k:, 5r:,1 .L'= x rx,L 9 } 5-_ - _^k -'r_ . '*' v ,!t 'r'1-L., Y 'k', �'�'1.. - - , .a L _, -.ram ' ;�, •k' S ,. i'.','* ii; r,,4'r }5!'..y,S.Y??t`.`.. r; 5.i L•ry,:- h - - - ,� 4....1 ii•k+T"',�, ' k' _ - `,,k''.F :-, '-5=, .'+�',, .'X!.�s rk.+.� �Y � lY "r 1M1 Yt'i.`!S.'. ;, Y- i- ''I''1::'},' -��:; ,.w{' +;tir +-}fi:: -sti Lk •,4',r1T.; tit.", .iiK'�.'• _ 1' - L - t' . t . s. f'.' - ; 1 1 . - i _ _ - - _ '. a-. 00D Main Channel DI tarn ce (ft) BOOR '10000 Legend E 1OD-err 1 S I00-yr Grit I00- r Ground Right Levee Plan: Plan 04 t1ll rater River Sherbrooke f : 5 Profile; 10- r _...., . _,_.� _ �.. _ .. � E.G. Fte . 2968.2 . - Elp' Ment Left OBE_ Channel' Right OB ........... e dead (ft) 0.09 1 1 ti -Val �; 0.070 0.050 W.S. t 2968.16 1 i each:: Len. ()_-�_.._ 1 2194.00 2211.90 2222.00 _ rit- . .- M) # Flo r.Area ('o70.59 1313.69 'Er r 10 li. =..� 0.00024E _ 70.59 1313.69 Total fs 3244.00 1. Flow. WS) r 0#37 17.64 ''Width.� �16 1.4 Top WIdt (ft} t 60.24 101.25 V Lrl # Lli��7� •t7 f .e#.r ;� 7�+..17 -:Max Chi. DptJ� 19.55 Depth (ft) � � 1.17 198 Cony# .T0 1. MS). 206106.6 Con 1675.1 , *#J Wn u 1 s (it i l� i •- �..r RJ* 9s6 1141n Ch`El. 948.6 he . I q ft - 0 0.19 t3rearri{-Po r r:(lblft S � 9401 0.45 l~rotn Loss () 0,60 e (a*fty. 5.47258.64 14.61 Plan: Plan 04 Sflllwater Eiger Sherbrooke RS: 5 PrafJle: a-yr I'S .G. E1ev �f t - 2970.75 1'. "Ele' en' : . L� . , flannel l igh CAB _ ` . i,'EIe (ft).: 2970.63 ,.'F aoh.ta.er�i. eft} ; .. "19�4.00} 2'i'1,90 _. -� +0[ ` rat F7QW.-Ar .: sq .ft . { 98.46 1567.14 E. *',: ope ft/ft . l 0.000275 2913.46 1567.14 ' .Total (dfs) ' �_ _4__ P46 .00 J.,mbw � 187.41 4437.59 TO Width' � 229.37 ,1. Top. Wid 124.80 104.57 } lvl9 x Ohl. Dpih:� 22.021 l' dr: 'Depth . ) a30 '14.99 ......'' # on:;dotal ' _ '8926.6 orr':. .' -- �. � 11302.4 26623, Len-- Wtd. � � �} • � 2211.49 r' wed � Perk. �fi� � 125a80 113.77 � l., ft 2940i91 h QI' i ' q •j 0. o.2 Lph.R��_ �# .26 �� 6 rat' Po m r- (lb/ft.. : 0.08 # 0.67 ' l r i s. ft 0.61 u 7.Volurt 6: cre=ft) i 31.07 '19.18 63.65 E l:.o - 0#01 i - arm :.. t 2.82 25 25.20 Plan: Plan 04 Stillwater River S it er_b_ rooke I r 5 Profile: 109- r___ y le -, (t -� 971.68 -pl ant , _ � � --� F- � � * . ~ l�annol �. _.Rl lit 8 1lel Head.. f# _ W.'Elev 0%'J'■E . 1 3 r � 1� Y �# Y.al, 2971.4 Re' ' �} r �•�7L! j''��.y.,�.]� kJ.�iJLf ��• . MY I h'.L' '194.00 21'1.90 222.00 Grit 1 • .. ff _- 1.''Fidw-Arda (sq ft) . 409.98 1653.60 : :-S1bpe (f# ft : 1 0.000286 1 - rea.k ) 409.98 1653.60 +£ ' LJta l {ifs 5201.00 r 1' lOw ... �ti.�__ _ 9 , 48 4909.52 Top 1 tdth eft) 252.04 # .Top 11' td#.( 146.36 105.68 el TOf'1. 2.52 ' erg. �♦ ��. 0.71 +7 'M Chi'- D . �� TConv. . B H dr; Depth _ 2.0 2 80 ToW �( fs307575.7 Caner. o1~s 1723 .3 f4'�j1�{� `f�'� 2i_r43V8i4 0 Length Wtd. ( .:: 2211.30 Wetted Per. f#} 147.61 11. lA ch El � _ 948.61 i Shea r'(lb sq ft) : � :. � � 0.06 0.26 I-Ilpha _ 1. 1 " freh , POWer.(l /1t s) . .,0.62 R 0.04 0. 6 Fiott lass (ft) 4. 1 umn.l,alu"nri acre- 1.2 339.83 80,86 E Loss ( _ 0.01 Cur' SA, (acm__ �J1 25.59 4,8 29.74 Plan: Plan 04 SMIwater River Silverbrooke RS: 5 Profile: 900-err le'vi". 2973.16 1 Element 1. _... _.. t 'Vel,H'e'ad r LeA OB Channel i g (fl) 0.15 1 -VV��_N-Val. Elev.� .,..� 973.0 Reach Len. ft 194.00 2211.90 2222.00. # cdt W.S. (ft) '. l =low Area q ft - r-.._...�� ] .. E.G. slope (ftlfi# 0.000 30 t Aroa 670.90 1820.50 Total (ifs) 6495.00 flow e S 584.44 5910.56 Top F 'wt L.W # is (f i). .' ; 187. 107.78 -Max ["HAr..Ddp..4.0 3.58 16.89 LJn r T t l' 3091 .8 Conv. 33196.0 335720.8 Lsr1g_'Iltd. (ft) 2210.84 .'f ettd: lei-:: (ft):. '! 117.77 11�ir . ti # :: , 948.61 ,F4 lbJsq � 5 0.07 0.30 ' Alpha -, : '.' 1.42 1#6anPlblf= O_D8 .07 Fran Ldss'00 0.65 ..CUM' Vb1.0 1 ecre-ft ' . 95.49 379.16 143.46 j. s e E`Losft .:. 0.01 ;:.. ern SAJ�L��� 30.74 25.271 43.621 Plan: Plan 04 Sflllw2ter River Silverbmoke FPS: 5 Profile; calibrate E. Eloir ft) 064. t ror� : - .. � �-~--`L eft OB 96.2 F l lilpc n.:.IR t'ma�yy.;; ii ++ .. - f1l . lope. t1ft 0.000 40 `[ 4r a: sq i`a#a1' f 1907.00 ;: FI (c f i) Top Width ft 1 91.21 . T6p W1 TOW.-OVS). 2.06 .(f�s)". ' •Max, Chl Dpt ( . ' 15059 ; ydr. -Depth :(ft) ... � o 1y. Te t .(6fi) 123063.5 1 Con v. ,( l Length l td. f t ;. 2211.90 I " etted. Per. fk . WC h _�l ft _ g 6 51 f Shear. Ib/sq �.,,._._ • _.�� Alpha . 1.60 !.Stram Parer (lb/ft s) . 1 rc;h Loss (ft) 0.65 1CUM" l oliarhe a re-ft� • . 0.00 .hum SA (acres.. *1 Plant Plan 04 Stillwater river SlIverbrooke RS: 4 Profile: I O-err Channel ; V RIght 8 0.0,90_.f, 2194.00 2211.90 2222.00 926.60 96.50 1907.00 91.21 2.06 10.16 123063.5 98}L.f8 0.1 04 9 171.51 � 09 E.G. Elev M 2967.65 * Etetheht: Lei Ve1_�-1 aff fff)- .- 0.07 I.-WL' -Val.- .�.. . # Efev L+►U + 1G6• ft k1019.00 Flo, �+ e ( q4 , Ei. Slope (eft . 0.00097 Aa`sq ] }Q Total (f :.. '. 3244.00 ;. Plow (cf ) . Top WidthIp 189.05 + Tep'WldW_(ft). ��...-.r._���--,� del Total ftfs 2.15 t el. #t S x Max. hl Dpth .. 16.661, H dr. Depth ( 1 on. Total tt _ _ 188358.7 .ong.o� Len th .1I td. (ft) 965.53 lWetted Min Ch El () 950. hear (Ih s ..- _�..� 4 q ! j Alpha 1.00 ' ,.Stream Power 1bI ) : . y Frcto LOSS (M. 0. 7 urr� l�olurne acre '-ft 310 CA ,.� E Loss Ift) 0.00 Cum-SA.-aaic--r-e �•fi h ni 1. Rlgl t OB 0.050 965.54 923.00 1509.27 1509.27 3.00 169.05 8.93 .{ I a835a. 175.38 IJ. 0a.34 18/.87 14.61 16,91 12.24 Plan: Plan 04 Stillwater River Silverbrooke 1 : Profile: 50-err G E.G. -fig..{4 970.1 jtfle'ment i. Deft 013 ChannelW Right OB W.S. Ele -(ft)' . 970.04 Rea; 6 _'erg, ) 101 9.GO 965.54 +00 rrt W.S. 00 l Flow Area. sg ft) 85.73 1938.14 ' E.G.•Slope (f#1ft) 0.000 75 Area { q, : .� �.� 66.78 1938.1 T TTtal � • } L 1 6 i00 F 16 f 3 $ 4601.43 Top W.idth .(ft) 242.25 Tod WIdt,b 00 1 66.85 175.8 1 el Tofal O . 2.31 1 Avg. Vql.. {fff ~� 0.35 2.37 . Max: h# Dpthlft) : _ 19.12 H r: Deli -'.J � 1.01 11.02 V... o#al 1 . 895iY $ ' a�'1ir. � _ 4 )-'S .. 1421.6 277541.0 .Length: td. ft) 965.38 � btted P r. 00:., .. ' 66.38 18 . 4 r'. IlrtiT -. t ..' tiJOL. F � : h ea 15 e. ft f 0.02 0.18 1phe1.05 Cream -Obw' r (IbIf ' ' � 0.01 0.43 _l+rcth toss' MY .. 0i 5 � 1�� llol+uM arr�- t '1.87 0.18 63.65 . Eos ft_ '�-..-,-�...��.. ' _ ., „M,..0.00ufT]cf .. _ _ - -..-...ter,• - - 18 01 - ; ... ; 17' 53 5.0 Plan: Plan 04 Stillwater River ilverbrool e 1 . Profile_ 100- r E.G.' E.'fi�' - .J7s9i.! r EIT-i+11117 �..k:rs L#1 -^Il deaVal T .1J �J W; Lr-Y�f'akJ0 ■TL ■■■■....__ 6 V 9o 6 a e}y=}ram' d n \y/ 1019.00 9 'Cdf 1J f. ..(ft 131.81 2081.92 i a T twI*) 7�r 5201.01) I=l_W �cfs 5Bl10 5142.81 100 Width _Ot269 .99-Top .1 idt { } 93.25 176.74 I.Vel Total ft1 ) . .35 044 2.47 l :. px' l ptf } . 19,9 � +H dti D�p#� � }� . 1.41 11.75 I ' Conv. Totbl . (ct) 314889.1 1, _onv# ... ..+ 52248 311366.3 LLenOffi _ 95.85 93.00 184.41 Min'..th-El {�# ::: : � 950.9 (,:,.Shear. lblq � .:. -:� � 0.02 0!19 1. 9 tr ai''r v r 1 # l 0.01 0.47 Frta ' a :� 0. :..-11 : r 1t urn lc n are- .' l 37.81 244.99 86.85 .- ° 1E -Los's,-A: 0.00 urn A ( ores :., 9.55 17.69 29.74 Plam Plan 04 Stillwater River Silverbrooke IDS: 4 Profile- 50 -yr fit#} 97.50 EIein. deft OB Ch2nnesRight 01.1 VI l'� 0.1 �t.1. ... 0.070 1J . . El } 2972.40 ; Reach Len. t� F 1019.00 965.54 923.00 Flow Are q. 314.19 2354.89 +... Z4. _ Slope ftlfif) . 0.000 77 1.' reap (! A) # 314.19 2354.89 T��t. G`f� 5495.00 l'lclik►'�.__,-_. ' . �;-^--� 186.56 5308.44 "TOO Wdih�rt 822.31 ; Top . Width.. f 43l97 178.33_ Vel Tot:40s) 2.43 �. Avg.1 et. �(fttsl 0.59 2.68 WX I Dpih f# i lttr. Depth (ft ,18 13+1 [-C66v, T6fai. of ._ �_ 390527.0 11217.3 379309.7 l ength Ltd. 966.5 [-M�ftd PerR (ft) 1 -4rQ�4 6 .63 Min h .EI (ft _ 950.9 1 Shear lb� �. �._ � 0.04 0#22 A a � 1.18 r . S, trea '._Power IbIft s) 0.0 0.58 Frctn toss ft) 0.26 um' Volu e a r&f.t 70.68 273.15 143.46.�. -C & E. 0.00 j Curb SA {acres ;22.39 18.00 43.62 Plan: Plan 04 Stillwater River SlIverbrooke Profile: mllbrate I Val Read . ' . 0.07 , w.L 1 40.050 1J1 i .. EfEiy A 963.55 Reach I n..() 9.00 965.54 923.00 ' .Flew Area'scl}+ 914.39 _ E. ; Slope fVftj6. k o.600366+ . rea 914.39 ` OWI (fs)- �� � 1907.00 Flo a 1907.00 F 'Top Il l d ft, (ft) k �•� 125.63 + c P:- d-tff . ft .:.• 125.63 ' Vb 1 Totbl , Lf 37 i .0 E :1F el • `' E # Max� t �1� 1L fLi Hot.... De�th.'_ #L jCp'n_:,'T6tal �. F99693#7 .darer,. : , H i Q 1�+y��7y +{} 99693.7 9a�6 . # Lend---Wtd.:. ftY. .965.54 :1 $ ed 1 er 130.13 # h EI 2950.192 a: Shear_(Ib/ fit) ' 0.16 AlPi #1 ., -� 0 1 FLU FJ M1!',1#J1 4i 1J i �i7 Frc[. '..Loss ; . ' 0. 9 , �m-1 1u rte;'acrefl 124.77 � Vw7 'TM) VaO , L+tli1., 13.791 Plan:Plan 04 SUIlwater Av❑e�-ry+/� lIve�rr.br}o�oke f ; Profile: 10_-yr 4rY�iY1 .��'' � iJ1Jf i� i F��� Il�i.l�' +'• •••� -..�.-:ram ,! _ �--'--`�""-' - Le1 Channel .�+,: Right 0.050 0.070 '1 i . ,• Elea. f _ 96 .30 E'.'F cl�:.e �. { 340 i00 343 a8 3461.99 Cat .; Y. : -:' slope_ ft1f# 955. [.'F' 16'v' ree.{sr1428.79 04000668.79 6,08 6.08 IrJ N . 0495 Jop Width 150.7" I_Top.W101b . my, fi 0.81 19,92 4. To ) _ . i AI .. 2,27 0.16 =: Max. hl- of (ft) 10429 # Hydr.: Dep. eft): Q. 0.30 °% ..... t or vr.:Toial ( s) 198845.1 - or' . 198786.7 58.4 . Lengtl .: td: ,. f • _ 343 .33 . he ed Per.. fft ..141.05 19.93 MI h;' l .. ft ' 948.01 i 8l .r b/s 'ft} . 0.17 0.01 1,01#I'7fl=t 0.00 ess'(f , 0�0 '_ Um0.38 me.acre- . ' 3.70 154. 114.54 C, a t. E. �,6%�. ( _1 0-00 � . Llf17 }*{ Oc ` ' + F •.71� . 1 . 12.03 Plan. Plan 04 SUllwater River Silverbrooke S: 3 Profile: 50-yr FV-61 lead : 0.10 W L,n- Val... � . _. 0.070 �! � 2969.76 Reach: 340 .00 956. [-_:FIdw-Area'qq 44,00 F t E+ ., 160a (ftl r 0.000271 1'Area .q 44.00 5.73 p Width' ft 425.2E ToO Width } I e1.Teta1 ftl .3 I v k 0.13 Max Chi .Dpth ft � +1 i 5 -Hor.-` bepth , f. Gong# T6ta1 �.. i.r� #S.U]1Ji'•#� j Length YLtd - ty• _ �_ 3433.70 Wetted Per t I A iry . h Ell (ft) 2948.01 hear d8 q i . ,._1pt --iDWD Llbft Fretnss, f0.86 1 OM V616me (ao t - + CA E Lass (ft). ._._ ••_n 0.01 ; um SA (acres) 0.23 348.6 192.92 0.00 0.00 0.5 14.98 Channel. PJ'gh.t B 0X5g ' 0.0 j'� 3431.8../ 3461.99 1 5Z66 154.06 1752,66 154.06 y 1547.70 1.57 13+/.07 100.33 ,59 0.46 76498.7 4351.31 143.30 100.38 0.21 0.03 0.54 0.01 14.11 .14 Plan: Plan 04 Stillwater River ilverbrooke . 3 Profile. 1 ❑0-yr -. - i Element- ,nN61. OB t. Channel lei : ht: F31 I e'a (ff) Y F. ` El 0.11 il w ,..eft ! 0.070 i# 0+050 0. 070 � . .: eV (ff � 97 0. 8 . Reach LerM, f t - 3402.00 3431.89 3461.99 6t.w. . t2957.201 1�'y Slope , Flow ree s ) _, �� 03. 4 �,.�� 1860.97 s3 247.32 ■ (� _��ULLJ\If"i �,.� 37 t .' (' q f 203.24 1860-97 247.32 { . .Tofalcfs 01.007.34 49rt94+ 133.71 TO 454.69 ` 6p' . ildth ( ) ' *.. 195 .50 132.07 127.12 f �y + # # 2.25 Avg f� 0.36 .68 0.54 fax CrhI: pt. (ft) 22.57 ..l":l d�rt D"th 1.04 14.09 1.95 .Corer. "i"ctal (. c)' 318'163. 1 1 bhp .- , F .....: � 4425. 305558.0 8179. .en ih wt , (l } 3434.09 e'' 6 Per, ff .:. 195.66 143.30 17.18 1' l it E _ 948.01 Shear (161 -ft) 4t - .! 0.02 rt2-2 03 rt Fr Fn Lo1 s & ELoss'. eft} t___ t69 �J.13� �� "Vol m � r6- i C ,�f 0.01 201.29 U +G ' . UBacres ..._��. 15.17 14. 28.40 Plan. Plan 04 Stillwater River Silverbrooke , 3 Profile. 00-err k l� rt J.01al ( S).. � �y y f Len Wtdi,. ) Plan; Plan 04 Stillwater River Sherbrooke f ; 3 Profile: calibrate #wVi 11 iL fr 29433 .".'E'lem'ent ei lead ff 0.06 1 • A-VaI; W. . ley (ft2963.27 . ..__} ' _ j -F east L-6n_ ff 3402.00 I 2953.85 Flow -Mea, 50AY TM # _ k E.G.. Cope . fftli`t 0.000247 l .Ares' (q ft.) { --co l: ( fs)- ' „ 1907,00 FI'D f . , : { Tajo :Wldth 103.10 T 11i .(f#):..:., -., 1el..T'otel ff 1 a#I 4J � .fj�;+, � �/} r.,el.rr�:..-.�.. fft/s t i max C hl..t pth F . l l. t i orklr,cal �1137i8 o :\ (�' f }- den � , { + 34 1.39 1 i often Per. (ft) -Min h.- ( 948.01 Shear (1W6q. ft).r .. Alpha _ FFe to Lo ( 1.00 J,$treaT po r~r.(lb/ft.s . - I 0.9 !'.Cum V {,/jl. me p T$-ft {CAE floss ( . � - - � �.., 0.00 Cum • Cadres) hannel lght OB 0.050 3431.89 3461.99 964.74 _.. 964.74 1907.00 10. �''1y 0 1.../ 8 9i31 i 121372.8 110.76 0.1 0.27 103.94 11.5 k. Plana Plan; 04 Stillwater River Bilverbrooke 1 # 2 Profile. 10-r � EfeV{ # �� 2966. 4 ' Eleme �; .....�__.:�..��: L � B � .. ha�rrrer �. � l l h. { t' B ' `�-y_ F1 1 1e'_' 0a W• . r.� t ...._r! 4�!+�..r +++���--f��� ��y� +.+ rt U.f _+may, +f L1TV# .. l .:_. 966.37 -. ri: ft t 698t00 �1676# 0 rC n It W.S, r(f#.) .: : Flow Ares (sq A). �` � _ 24.18 1290.01 243.28 I E. # lope' ;# ft} ' 0.000 73 I .Ares (sq ft)_.. l 24.18 �1 90.243.28 a (Crs), 3244.00 6.31 3137.54 +8tal f�f ,1 ' T60 width (ft):_ . 338.16 p 'Il dth: i ...:' _"' . •` 37.6 100#33 191.21 2.08 ..11ax. hl .Do#1�: my 20.14 1 '.l dfrd Del' ().:. l o.64 11.80 1.27 196339.5 1. b* (01.:... � � 381.7 100806.1 6061.7 i Le. hgth.Wfd_ 1678.56 Ile d P r.'.. } :f 7.71 117.02 101.30 Min .. h .Efeft) 2946,22shear �ib�aq-ft '.._� 0.01 0.19 0#0 Alpha.' ' . trea Power 16/ft' }, OD 0.46 0.01 3.641 Plan. Plan 04 StillwaterRIver SlIverbrooke IRS: 2 Profile. 60-r l�i�F' l�iJ 69a El eme 4 .. . 4' Channel ;'. Ight.' B 0.08 ; L rx�11 1 +- . j 0.070 +! 0.000 0.070 w: 1 ��f .. 968#9 !' I e oh er : ' . 098a00 1678.54 1659.00 Dr1t 111Ir i f :'Flow- A . { q'.1 .. 19 .88 1575.28 951.00 irt7..1#' O,OQQ 3�i ="fires r,- 19 .88 1575.28 951.00 4625.00 Flow. _ .8 3905.54 4aJLJ # a 'TOP idt .(ft) 3 t , Top;l Id -(ft)''r ' .,..� 8.86 113.98 342,79 1.70 Ls . 0.64 2.77 �.....' I Derr .:TbWi ds :. 30 38 r0 1 CO, �s .., { . 7539.0 257202.430 4 #8 1�'t � .-... .�.:.. +.I! Vf 8 +��T7ate et..(ft .22 122.33 TVriJ 1i Dh El. ' - 0i2-2 Shribe 0.04 Oa 6s0 alpha ' 1.82 L t#dM 1�� . -. 1 ' #02 0.46 0.03 r tr L ,. D#60 1 Dunn u C.T - 1.25 58.18 13. Plan: Plan (14 SHIlwater River Bilverbreoke 1 : 2 Profile.- 100- r 060.8 :. le i ht-_ b fit B .' Dhanne'l Bight B-) Vl Head 1 [ t#LT �� + GII • ++li 1 L1.41tLl W.S. Elev 96 2%.#1..A9q, Re':ar.'A:L& l .Drtt 1'I r .. li I Fldv rea . : ft.). 263.53 1670r88 1265.93 3 a. ... iepe ( ft' 0+000 11--ke"a'eq ft) ' :. i 63.5 1673.88 1265.93 T.6tal 5201.00 FID . of .: i 179.94 41 5.01 870.0 Top ..11 dth+ # 593.67 ' -T6p .: xdth; 'l 80.06 115.55 397.18 ftl.'� 1.62 I:"1feCr ftl 0.68 2.48 0.69 'Max Chi_DO#h, ft) r 23.86 Hdrr.Depth. 3.26 14.49 3.19 °'n ..Total (eft). 353658s bnv... �.. ± 12235.5 281853.1 9569" Length. Md. (). 16 8,2 W tted Pei'.. � . 81.47 124.11 397.64 Alpha 1.139 l tr6 M kiv r iblft ) 0.03 0,45 0.03 ��-++�. } l } 4Q rb}''��;..� r�1r die jury a_�...a�t��..n.-.�.. 0.48 62.04 1 A..t.V R { VaFr Plan: Plan 04 Stillwater Diver Silverbrooke R : 2 ProOle.- 00- r � �-Left E. EleV : ( . 2971.46 l m' ant DS ! Channel ■ Right, B -�--el head_ �- 0.07 I t,:.n 1 1: 070 0.050 0.070 A sq 8iv- ).. 97r1 rt88 F each Len'.. ft) :.. 1608.00 _ 1678.64 1659.00 r' t rt Flog- Area q , � �� _1 � 96.43 1861.48 2026.49 [E.G. Slope NftY� 0.000199 . ea (q, '' 396.43 1861.48 2026.49 i 076tal (cf -'. 1. 6495.00 _ 329.98 466 .99 1497.04 TO1 1 idth .eft). 793.2TD-:Wid -(- t)- 84.83 11 a.47 589.91 el T6WI (Ws):'I....,..-... j 1 q52 i Avg.1Iel, ttls) � 0.83 2.51 0.741 {�li ax Dhl Dpth- 6.16 i ..1•` ydr' Dept {# 4.67 1.7f 3.44 1 6n . Total c% 459928.9 - 599 28.9 1','C ti/nVt (61�) 2,9366.5 056 .9 10 009.5 Length.-Md. fft) 1070. t Metted Per. E 0 .66 127.45 590.75 Min . h : left) . 2940.E ear (lb sq fl .• 0.06 1,Jrt 0«04 1phe . - .0eatn" Pier (lbft 0.08 0.45.08 l=r Li . #t ;' 0.46 ;. burn �olurr� ' ar 'e-l�# :. +64 69rt46 a rt *& E Lib#t 0.0'1 1 Um -SA (a r } - - L 4.69 11.23 Plan: Plan 04 Stillwater Fiver SlIverbrooke FPS. Profile: calibrate__ E. 96 . 8 l Me rter t�....� ... �f.,eff'.''Channel! _ yD am eli - �* l ht B �� 1e l ead fW:. Ln1a . rtL l - 0.050 i�- 2962.31 � beach Le- n.:.(ft) 1698.00 1678,64 1659.00 " rat VV's . ) # Flow Area. E.G.- l6pe l`U t - 0.000 13 s Area. q..f1 . Q Total M , 1907,00 r Flo `('fs A 1907.00 Tbp Wdth... ft 95.95 1 b, l Width. 98■9 llel Tot M.{ s) .19 Avg. l el.,(fvg), . F .�19 c .Dhl Dpth . (9) 16■08 -. - H r_: De th ( , - . .906 r....... i onv. • To l {LIs) 107821.8 } Con . qt107821.8 1 78.64 'V1 eited Per}' 102.03 �.11nDh El 946■22 . lea," rlbsq ft 0.17 1+00 str,eam Pow t- lb/fit. . - 0rt37 Fro{# ...:. Ort59: burn 1ftrria nacre-f# 31.68 i--.D E Los 0.00 1 CUM" SA. a res) 3.41 Plan: Plan 04 Stillwater River Silverbrooke 1 : 1 profile: 10-yr 1 E; , Elev MY, 968,90 ['Ele'ent.:Left 013Channel'-_..._Rlght OB Vel Mead ft . 0.11 1 Wt n-V61 ■ ; t 0 07D 0.060a leis. 80V { _ 2965.79 beach Len . ft rt + } � Drif W. . M 953-17 1 Flo Area sq ft y ; '1 7,O 00.06 :. Sloe -- D.009400 reaq t1. 117.06 1160.06 {0 Total: 3244.00 PI uv: s 68.�13 3'175.8 17'7.48 -6IO . dth ( Q4.9 l 1lel Total s ,.. S .54 : Avg: Deli (ftls):. y 0.582.74 Mbx Chi-Doth ( )_..�� 0.78 Hyrlr."._Depth (). .6 ■06 on, w "foul {Cfs 162125.2 Donor. (ofs)' 3404.9 1087 0.3 Length Wtd.' ft : .Wetted Per. MY 72.98 117.43 a in Dh El.(1 } 946,01 1 Shear..:OWSO.10 0.04 0. Alpha _ _ 1.'14 1. t am Pager lbIft . 0.0 0.68 Prntn Lass (ft} -- - burn 1 olurne {acre~ft � D & E Loss. #t Cum .A .a`e Plan: Plan 04 _ Stillwater Fiver Sliverbroake IDS: I Profile: 0-err ' E. G E1' h) 08. 0 `Element .. deft ` # annel Ili ?t 03 el Head . eft - v 3 ° W Val t 0 ....� 0.050 Grit W.S. (ft) 954+04 (s.q- ft) �..a4 3a2.15 1444.29 x E. Iap - fUft) T F 0.00040�1 Area' sq �. ' 382.15 1444.29 I To LS 'TU+VLIW+J +'T 'T+G Top Width ( t 60.5 ; Top -Width (ft :. * , 145.14 115.37 . l ,Ptb . a F+J eph ) 63 12.52 '.onvr+ Total.'(o .. 31041:3 1 ,Obh- V. 16337.0 214704.3 W 145.95 129.10 I Min. h` .14) 2945.01 1.Shear (lb sq ft) 0.07 0.28 Alpha _ 1.29 s ' traarn:. Power. Ihlft 1 0.06 0.8 I..Fr 'Loss ft ., i M.: lc lui"ilo',` aor - i Plan: Plan 04 SHIlwater River 511verbrooke , 1 Profile. 1 00-r 969.3 f E'tent:' " "�--- •-- . : t.eft . 8 Channel!'. Fight 13 + + 969+4 Reaoh :..MY 2955.19 � ..Fl +v' � .�sq'ft 529.84 1546.00 : ' tape ftf#t -: '. 0.00040 re s ft :529.84 1546.00 1, ,T10tal L 5201.00 Fl iixr. s i 482.63 4718.37 I To Width.;-(ft)_ A _Top. 13+80 : " Width,. (ft)195.01 113.89 1lel 'otal. ftl2.51t AVM."11e ,.' f 0.91 3,05 Max hl Dpth (ft I 4. 3 F .I �+'iJ - `�-i Vi 4I I-. b' hV" ,'Tota1:(�t) 2598511.3 Cbn' v. ( s)_' - 4113.3 235738.0 I t.ength . td.•.:(ff) hefted .PEE•::195.99 133.02 MI. 945+0 ` it ea '- ih s 0.07 0.29 11 .. .V t.: LI ry.#'_wYe1's 1 �[y' 0.06 .0 0.89, . r tj'I Lass l rll 611.�171e 1 �.+-ft " 4+-l L L#' # G7 res P12n Plan 04 SUIIW2ter tier SlIverbrooke IRS: +1 Profile: 00- r E. .' 1'ev. ft - -_-- - -_� -- 970.99 1 Element -' - -�-- .eft o8 ��. trann i I Ighi H !e! Hea'd' ft- 0.14 ' WL n -INlal* 0.070 R L ,0 0 _ w. * Kiev ft.t. ` _2970.85Re'ij:ch rit, , # ft) -�. 9 6.3 Fl tr a { 919.22 1743.12 ;i . lope ftlft O.00Q 00 A►re q f :.:. T Total • (e%) 6495.00 now 9 9,E 1743.1 923.90 5571.10 7p�llllydth eft} . 4"IO.9'I Top 1dthft)' 8.89 10.0 l el Total f#Is ... +44 M M. V61- ft/0 - 1.01 3.20 'Wx Ch"LE)p1h (ft) . 4 t H rdri depth-.�..+.�.�_-«..._ 3.22 13.94 onV.-76tai (ifs) . 324505.3 Gong. dfs_ 46174.6 278430.7 Length Wtd. ft)• 1 t 'Wet#_ed-,Pbr. (ft) 287.19 139,89 ` Min h .El (fit) 945+01 1 hea I ,ft Alpha } 1.50 x Strewn Pbwer-(1b1`ft S 0.08 1.00 '• Frbtn Less (ft) # Cum olu Fie (acta- 4 I ;E La+. S (ft) i_ k Curs SA (acres) { Flan: Plan 04 911water River SlIverbrooke R : 1 Profile: calibrate E.G. El 'l . 1 :.... ! e l Head. ( •' :�Le B F `I --i amig Vvn- li fF bar�r� i Right B Y V*V 0 774.76 Total cf 1907.0V �� 1 io' � _ ,� � � # 190 roG I Top Wid77tf�., ft �'I.� f Tbp�WId't (� .. � '� �_ l ei Tow 8�.� (f )., ' .. .40 !-., vo Ve] f ... O . mU' bl Dp , _ 18.68 Hydr.' Depth MY i 9 . '. onv..55 Total RCN) 88.8 ' Cony: (� . ' :. ' . r 9808.8 Deng td.. # !_ etted Per. (ft) t yy �}7 92.0 1 92.01 Min Cis .El: tt _. 2945.01 # hoar flb/sq.ft I 8. 21 AIph--_ 1.08 Stream, Power. Ibl s � 0.8 *1H 1klr7 _ {tum.l Ol lme cre*�t . I..0 & E L : (k) ;. ��� ; Cum SA (acres)