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HomeMy WebLinkAboutSWP273205(9)Allen Quynn - I-405 drainage meeting Page 1 From: "Dale Anderson" <dale.anderson@i405.wsdot.wa.gov> To: <rstraka@ci.renton.wa.us>, <aquynn@ci.renton.wa.us> Date: 6/8/2005 3:44:19 PM Subject: 1-405 drainage meeting It was good to meet with you today. FYI - Here are some notes I wrote down in our meeting - this may help in your official comments on the NHC report to us - edit them as you see necessary. Do either of you recall providing David Masters with a copies of the Eastside Watershed Plan and EIS? I'd like to review them in the context of our discussion today. Are their any copies available for loan or on the web? Key points I wrote down from our meeting Ron does not see any fatal flaws, but we have several technical issues to investigate. Ron would like us: To encourage the MAPT staff to talk to Larry Fisher - the area habitat biologist that Ron works with. He believes the wetland impacts are a much greater challenge than the fish. To consider WSE for flood flows and slope stability on the east side of Panther Creek wetland. To consider the constraints for the 23rd channel expansion - utilities - potential soil contamination. He would like to eliminate the southern(34th st)outlet for fish habitat - counter point was that it may be helpful to keep for flow balancing. He would like to continue to use the 19th st outlet for flow balancing (he has this connected to a wetland, immediately west of SR 167). He would like to compare the northern tributary hydrology results to previous basin planning. He would like the stormdrain hydraulics checked to make sure flow increases in 23rd do not impact adjacent street drainage. 6(, i;, -a- Does the flow diversion into 23rd impact the EEI wetlands - particularly A & B - (we noted E was not affected). Eventually, he would like to know the projects impact to floodplain profile (pump station to 43rd) and apply FEQ to project. Section 3 Table 9 Simulated Peak Flows at Selected Locations 10-, 50-, and 100-Year Floods 10-Yr Flow 50-Yr Flow 50-Yr Flow 100-Yr Flow 100-Yr Flow Conveyance Conveyance Storage Conveyance Storage FEQ Flow Flow Flow Flow Flow Location/Description Node ID (cfs) (cfs) (cfs) (cfs) (cfs) SW 23rd Street Channel d/s of East Valley Road 4701 131 191 102 202 158 Springbrook Creek BRPS outflow 7223 942 1146 1360 1216 1700 BRPS inflow 7201 942 1147 863 1219 1312 Grady Way u/s 611+6402 835 1034 762 1104 1125 SW 16th Street 1015 831 1031 743 1100 1115 Confluence of Rolling Hills Creek 1301 819 1022 718 1092 1057 Confluence of SW 23rd St Channel 1601 779 971 667 1034 973 SW 27th d/s 1901 665 880 581 920 807 SW 27th u/s 2003 665 880 581 920 806 SW 34th d/s 2501 677 1042 578 1124 760 SW 34th A 2605 677 1042 578 1124 760 Oakesdale d/s 3001 684 1045 581 1127 769 Oakesdale u/s 3143 649 987 558 1069 743 SW 43rd d/s 3301 644 981 558 1060 746 3-2 R. W. BeckR:\Seattle\11-00781 Springbrook Creek FEMA remapping'ReportsTEMA Draft\SpringbrookCreekHydraulics2.doc 11/24/04 WSDOT I-405 Hydrologic Analysis of Panther Creek Diversion Questions What is the schedule for these improvements? 2. What is the difference in flows using the revised hydrology for this study and the FEMA floodplain update model for the South Renton Basin? 3. Diverting the South Renton Sub -basin (minus Renton Village) and Panther Creek into Panther Creek Wetland will result in substantial increase in flows in the SW 23tr Street Channel (P9). This will have a correspondingly large increase in the tailwater elevation at the EVR storm system outfall which will require mitigation to eliminate existing flooding on East Valley Road. Mitigation may entail increasing the capacity of Springbrook Creek downstream of 23`d St., P-9 channel improvements, upsizing of the pipe system in East Valley Road or a combination of all three. 4. The resulting increase in flows in Springbrook Creek from the diversion of Panther Creek between 23`d St. and 19`h St. may require channel improvements from SW 23`d Street to the new Oakesdale Bridge. 5. How will the hydrology in Wetlands A and B be impacted as a result of reducing the flows in Springbrook Creek between SW 34`h St. and SW 23`d St.? 6. Why was it decided not to include the coal mine discharge as a contribution to the South Renton sub -basin? 7. What is Panther Creek 100-yr floodplain elevation under this proposal and how will this elevation impact the slope stability along the eastside where Talbot Hill meets the wetland? 8. The FEQ model of Springbrook Creek should be revised to include the Panther Creek diversion. 9. What is the schedule for these improvements? 10. Any improvements to the 23`d Street channel will need to consider conflicts with the Olympic Pipeline and the City of Seattle 60" waterline that run east - west along the northside of the channel. There is also the Olympic Pipline culvert downstream of Lind Ave. that could have hydraulic impacts to the channel if flows are increased. MEMORANDUM northwest hydraulic consultants inc. 16300 christensen road, suite 350 tukwila, washington 98188-3418 (206) 241-6000 fax no. (206) 439-2420 DATE: May 19, 2005 TO: WSDOT I-405 Project Team FROM: Northwest Hydraulic Consultants, Inc. (nhc) SUBJECT: Part III of the South Renton Nickel Projects This memorandum describes hydrologic modeling and analyses of Springbrook Creek conducted by nhc for the I-405 Project Team's (STATE's) South Renton Nickel Projects. An HSPF model of Springbrook Creek, developed previously by nhc for a FEMA floodplain mapping study, was used as the starting point for evaluating various projects proposed by the STATE. The work conducted by nhc was separated into three parts. Part I, Support the Early Environmental Initiatives (EEI), involved adding conveyance improvenicniaJo, existing HSPF models of current and future land use. Part II, Support the Nickel Project Downstream Analyses, built upon Part I HSPF models by adding impervious area and detention facilities to represent additional traffic lanes and flow mitigation for I-405 and SR-167 improvements. Part III, Support the Basin Level Flow Control and Stream Restoration Projects, built upon Part I by modifying the current and future land use HSPF models to include new sub -basin delineations and proposed diversion alternatives to the Panther Creek Wetland. For each part of the project, duration, frequency, and other analyses were performed at specific locations to evaluate the hydrologic impacts of the proposed alternatives. This memorandum deals primarily with the efforts conducted under Part III and a presentation of the results of those efforts. Part III. Support the Basin Level Flow Control and Stream Restoration Concepts As noted above, the current and future land use HSPF models from Part I of this project were used as the basis for the models developed under Part III. For Part III, nhc modified these models to include four newly delineated subbasins (Thunder Hills, Renton Village, upper Rolling Hills, and unnamed trib sub- basins) which replaced what was previously modeled as a single sub -basin (called the Rolling Tills sub- tot basin). A map of the modeled sub -basins can be seen in Exhibit A. These HSPF models were then FOJ modified to represent three flow routing scenarios (baseline, proposed south diversion, and proposed north & south diversions) paired with the current and future land use scenarios. The models with the proposed south diversion were modified so that all of Panther Creek upstream of SR-167 was diverted to the Panther Creek Wetland, effectively removing the connection to the SW 34`h Street storm drainage system. Models with the proposed north and south diversions routed flow from sub -basins south of I-405 (Thunder Hills, Upper Rolling Hills, and unnamed trib), as well as Panther Creek, to the Panther Creek Wetland. Routing for the Renton Village sub -basin, north of I-405, was not modified in any of the scenarios, with flow from this sub -basin still directed to the SW 19t' Street culvert. A surface drainage basin contributing to mine discharge was not provided with the STATE's revised sub -basin delineations and thus this basin was not distinguished in the model. Current land use designations were based on 1999 aerial photos of the basin, and future (full build out) land use was taken as the maximum development allowed based on 2001 zoning. In addition to the model modifications described above, several unscoped changes were made to improve the model's representation of valley stage -storage -discharge relationships (HSPF FTABLEs). As previously modeled, the FTABLEs for the SW 19`h Street and SW 23`d Street outlets from the Panther Creek Wetland were developed based on limited site surveys conducted in the early 1990s. Since the hydraulic performance at these outlets is critical to developing accurate hydrologic information for the wetland, nhc refined the stage -discharge data for these outlets as follows: GVAO S,L-1'4 • An HY8 model of the box culvert inlet to the SW 19`h Street tributary was used to derive a new stage -storage -discharge table for the culvert. The new FTABLE also includes overflow to the 549*0,,, Panther Creek wetland when water surface elevations exceed 23.3 feet and crest the containing ./f;, d.4 Fw berm south of the culvert inlet. • A HEC-RAS model was built to represent the 23`d Street channel (P9 channel) from the outlet of Panther Creek Wetland to the confluence with Springbrook Creek. Cross section and culvert information were obtained from the Springbrook Creek FEQ model, topographic maps of the area, and site reconnaissance by nhc. The HEC-RAS model was used to develop new FTABLEs for reaches representing the SW 23`d Street channel and the outlet of the Panther Creek wetland. It should be noted that the HSPF models assume, and to the best of our knowledge it is true, that multiple cross culverts under SR 167 along the length of the Panther Creek Wetland have been plugged and do not If convey any flow. The FTABLE used for the Panther Creek Wetland in this study and in all previous analyses by nhc assumes this to be the case. The results of nhc's analyses are presented primarily as two types of plots (frequency plots and duration plots) and as tabular summaries. Hydrologic analyses were conducted for current and future flow conditions at various points in the basin, shown on Exhibit A. Work Element B involved defining the existing hydroperiod and discharge characteristics of the Panther Creek Wetland using the baseline routing/current land use condition HSPF model. The following information was developed: a. Flow duration analysis for each of the 3 wetland outlets (north, central, and south wetland outlets) (Figure 3B 1). b. Annual and monthly stage duration analyses (Panther Creek Wetland) (Figures 3B 2-14). c. Duration Analysis on the 3-, 7- and 14-day average flows (north, central, and south wetland outlets) (Figures 3B 15-17) Work Element D compared hydrologic conditions under the baseline routing to conditions with the proposed south diversion, which would route all of Panther Creek into the Panther Creek Wetland. Work Element E compared hydrologic conditions under the baseline routing to the conditions with both proposed diversions in place. These diversions would route all of Panther Creek, Upper Rolling Hills, Thunder Hills, and the unnamed trib directly to the Panther Creek Wetland. For Work Elements D and E, nhc compared baseline and proposed routing scenarios as follows: a. Change in peak flows and flow durations downstream of the southern Panther Creek Wetland outlet (SW 34th Street tributary) (Figures 3D 1 & 2) (Figures 3E 1 & 2). b. Change in peak flows and flow durations downstream of the central Panther Creek Wetland outlet (SW 23rd Street tributary) (Figures 3D 3 & 4) (Figures 3E 3 & 4). c. Change in peak flows and flow durations downstream of the north Panther Creek Wetland outlet (SW 19`h Street tributary) (Figures 3D 5 & 6) (Figures 3E 5 & 6). d. Change in peak flows and flow durations within Springbrook Creek downstream of the SW 23`d Street Channel (Figures 3D 7 & 8) (Figures 3E 7 & 8). 1' 34 6, 5 t ' Cf.e. Change in peak flows and flow durations within Springbrook Creek downstream of the SW19`hStreet Channel (Figures 3D 9 & 10) (Figures 3E 9 & 10). Change in peak stages and stage durations within the Panther Creek Wetland (Figures 3D - 11 & 12) (Figures 3E 11 & 12). In addition to the analyses defined in nhc's scope (items a through f) an analysis point was added on Springbrook Creek downstream of SW 19`h Street (item e. above) and stage frequency analysis was performed on the Panther Creek Wetland (item f.). nhc also conducted an analysis to determine how close the simulated peak stages in the Panther Creek Wetland come to overtopping SR-167 as the STATE was interested in this information. Based on the available topographic mapping, nhc estimates that the road surface of SR-167 near the SW 23`d Street wetland outlet is at elevation 33 feet NAVD9fSince the simulated peak water surface elevation in the wetland never exceeded 23 feet NAVE under any of the modeled scenarios, there is approximately 10 feet of freeboard before road overtopping would become a concern at this location. The conclusions of Part I were also revisited to assure that the flow routing alternatives being considered in Part III do not impact the City of Renton and STATE wetland sites along Springbrook Creek between SW 27`h Street and SW 39`h Street. The HSPF reach on Springbrook Creek upstream of SW 34`h Street was used as a comparison location because it is the closest point to the Site E wetland. The results of the Part I analyses were compared to Part III D and Part III E using the following plots: • Annual stage duration analysis (Figures 3F 1 & 2). • Annual flow percent flow exceedance curves (Figures 3F 3 & 4). These figures demonstrate there are no significant changes at the City of Renton and STATE wetland sites along Springbrook Creek as a result of any of the proposed rerouting options considered in Part III. Brief descriptions of the hydrologic analyses conducted for Part III are provided below. Flow Frequency Analyses Frequency plots display the exceedance probability of maxima or minima data over a given analysis period (e.g. annual, seasonal, or monthly). For this analysis, the maximum annual values were extracted from the simulations and plotted on a probability scale using Gringorten's plotting position formula. Theoretical distributions were also fit to the data using the methods of Water Resources Council Bulletin vO1'�4 17B. The data was fit with mixed distributions instead of the Bulletin 17B when warranted by a physical irregularity, such as a control structure or overflow. These results are shown on the odd -numbered figures in Figures 3D 1-I I and 3E 1-11. Based on the fitted frequency distributions, it is possible to estimate the flow or stage that would be expected to be exceeded with a specific probability, e.g. the one percent chance exceedance flow, which has a one percent chance of being equaled or exceeded in any given year. The exceedance probability of a flow is often translated into a return period (with the return period equal to the reciprocal of the exceedance probability). The frequency plots include a secondary horizontal axis on the top of the plot that translates specific exceedance probabilities into return periods (expressed in years). Annual peak frequency plots are often used to estimate design discharges at various frequencies. To determine the x-year design flow, one would find the x-year mark on the top horizontal axis, then trace down until intersecting the theoretical distribution, then trace left to the vertical axis to determine flow corresponding to the x-year event. For example the 50-year flow on Springbrook Creek downstream of SW 19`h Street is 1062 cfs, assuming current land use and baseline routing. Tables 1 through 3 0 summarize the flows at various return periods at several locations of interest. " A16 {,�� �,�,�(,� rev, E Duration Analyses Duration plots display the cumulative percent of time that a given variable (e.g. discharge or stage) exceeds a pre -determined level. These are different from flow frequency plots in that all of the data, not just annual or seasonal extreme values, are used. The duration plots are shown in the even -numbered figures in Figures 3D 2-12 and 3E 2-12. These figures also include a secondary horizontal axis on the top of the plot that expresses the exceedance probability in terms of the average number of hours per year (Hrs/Yr) that the level is exceeded. Flow duration analyses were also conducted on data that were first averaged in a moving window over a desired period of time (e.g. 3-day, 7-day). These are the same as the plots described above with the exception that the data were first averaged over the stated period before performing the duration analysis. Event -Elevation -Duration Analyses At STATE's request, nhc produced current conditions and future conditions event -elevation -duration tables for the Panther Creek Wetland. These tables show the number of events of a given length that exceed the specified stage threshold, within a defined time period. Note that an event is defined as the time from when a stage first exceeds a given stage until the stage drops below that same stage again. Tabular summaries of the event -elevation -duration data are provided in Tables 4 through 15. Discussion of Results The analyses conducted under Part III provide an evaluation of the hydrology of the Panther Creek Wetland and the potential impacts of two proposed flow routing alternatives being considered by the STATE. Analyses were conducted for the wetland itself, for the conveyance systems downstream of the three main wetland outlets, and for Springbrook Creek at and near the location where these conveyance systems discharge to the creek. The six scenarios modeled include current and future (full build -out) land use conditions paired with 1) baseline routing conditions, 2) rerouting of Panther Creek to the Panther Creek Wetland, and 3) rerouting of Panther Creek and the Thunder Upper Rolling Hills, and unnamed trib sub -basins to the Panther Creek Wetland. The results, as presented in Figures 3B 1-17, Figures 3D 1-12, Figures 3E 1-12, Figures 3F 1-4 and Tables 1-15, provide a detailed picture of the hydrologic changes that would result from the proposed flow routing alternatives. The most relevant comparisons for the evaluation of the different flow routing alternatives are between data for the same land -use condition. Figures 3E 1&2, 3E 5&6, and 3E 3&4 respectively show that, under the proposed routing scenarios, flows could be reduced in the SW 34`h and SW 19`h Street systems but would be increased in the SW 23`d Street system. Furthermore, Figures 3E 11&12 show that the wetland water levels under the alternative routing scenarios would be markedly different from the current condition. Figures 3E 7 and 3E 9 shows that with the combined routing alternative there will be an increase in peak flows in Springbrook Creek between SW 23`d Street and SW 19`h Street but there will (' actuall decreas in peak flows in Springbrook Creek downstream of SW 19`h Streetx Tables 1 and 2 show the changes in simulated flow frequency quantiles resulting from the various land - use and flow routing scenarios. As shown in these tables flows will be reduced in the SW 19d' Street �^ system such that the 100-year flow under the combined diversion scenario (71.1 cfs Current, 82.1 cfs Future) will be less than the 2-year flow under the baseline condition (79.5 cfs Current, 98.9 cfs Future). At the same time, however, flows in the SW 23`d Street system will be increased so that the 10-year flow under the combined diversion scenario (97.4 cfs Current, 109.7 cfs Future) will exceed the baseline routing 100-year flow (8f.5 cfs Current, 92.3 cfs Future). As noted above, the main stem of Springbrook Creek will see increased flows 'in the reach between SW 23`d Street and SW 19`h Street and flow reductions downstream of SW 19d' Street. w h� G 1 44, _ -" - 011, u r ft.+yb Table 3 shows that higher stages in Panther Creek Wetland are likely to become more frequent under the proposed routing scenarios. For example the 2 year stage under the combined diversion scenario (18.3 feet Current, 18.8 feet Future) is approximately equal to the 50 year stage under baseline conditions. 1300000 w_ e it i r 3 F O t3 O O a E a i _ 9 E � E x. Y I�YLI�y�IY �•{ �• .. "_.> :°a...- £� ,Ifi 1 6 I iz 3. I III O R h 1300000 Legend WA Reference Map WSDOT I-405 Nickel Improvement Projects P� Hydrologic Output Locations Hydrologic Output Location — Fart 3 Support the Basin Level Flow Control and Streets Stream Restoration one is HSPF Sub Basins ® 0 os 1 Mlles Springbrook Ck and Tribs word. syst.: WA State Plane S horz. datum: NAD 83 horz. units: feet northwest hydraulic consultants project no. 21352 Exhibit A E 06 L r*-� LqC'i I� L > r Lo N 0 CO Z M Cl L O Cf) O CM co, OR M O 0 C() a) r C I- LO M N d ,,, N CM 00 O CD m N 06 L L CA CD � T O 00 'O 0 0 C0 N Cl) r r CD O O O C cz J C O L CA Lq LT I� M r- Lo 0 U) N Cl) O O O O U vi (D C LO N Lq co r C U co Ln M OD LO Q CND O U Cn �p C 06 L 7 co _ N 00 7 U) N M m C'7 cD CD coo (D rn Ir Z 0) c c L n CV O 0 CD CD M 0 N Cn M ao co CA U m C C`) O O in U (D co co0000 -t CC) V) � ccz m a) _O LL >, -C Y LO V' It N M (D I- O tf 0 O U) N M r-� 0) 6 LO CD 3 Z N LL LL -0 D � O L O Lo CD r CD I� co dt Cp d' It O r CA CC? 00 .- I, OD LL CU C M N r M d O L ca N M vi f� O w h M OO m 06 L L N M r Lq _ 0 U) N M CA CD Cn M � LL') LO z L N CO LO 0o CD N Cn CCU LO r- 01 LO CD N C O LC) CD O M m LO m � H �S L !n U 0 0CA 0 0 > ? L -2 i L a co a M M N o n c r co UH UH coo Cn0 �� 3= - s w a - � 9 w & \ / \ = 5 a = @ n 9 p 0 % / y r a 2 w Q \ 2 p 2 \ m Cl? m f \ \ \ \ $ % a y a g e m � Cl)\ m \ \ U) � 2 \ / \ Cl) \ / U) ± » / 2 # w g m \ $ \ / \ / ^ © a w = c \ \� @ 9 \ \ E a / \ » 9 ƒ F \ 0 m - / ± w m m z \ \ \ \ e co ® = e w r R o \ \ � LO \ \ / LL 7 C z \ � m & 7 9 % m / 2 m co® = e ± w _ o c o o f R c 5 \ a r w co J & \ / f n 06 = - e m ® g / \ / / \ Cl) \ � \ g \ m (6 o / o o g \ a E m o c = m \ Cl) \ \ \ \ co 3 / v/ c 3 3 a / _ a � / ± _»?»=»2m33 @&@R@&@e22 /a R 9 // G \ w a; m \ CD\ o / > a ) a a ¢ I � � 06 0 ® \ ) § b 22 G m Cl) E % \ m 7 - o r g c 0)\ I r = E \ a a o I O q � a\ ® e // \ G & \ g f \ 0 m m c 2 7 S� o # 2 \ a a § m I /\ R » \ % \ ° � \ \ e ® O % \ = 0 y = m a g f \ e c \ \ R & e / 3 \ a m co// c a \ / $ C Cl) # m \ 3 a $ Table 4. Panther Creek Wetiand (mar -May), Current Land Use, Baseline Routing r4me Series fi-.e.o.\21352- z-«oo oruzmsBu000 cuoEo\aaeF ocmzuoouoou\aroou.woM onm xou za Sran -Panther ok ntla-Basel ne-Current Values Greater than or equal Critical Total uoo=o Aua-iv"od.117024. Total Events aualvoeu.1170e4 Event Time Window: pe,iuu of aualrnia.10/01/1e48 - 9/30/2001 using mnrtun.Mamcu to MAY c=jt4cal Value 15.000 15.500 16.000 16.500 17.000 17.500 %t>~ cc���caz 3-.195 2.563 o.*ou 0.197 0.065 0.026 uc>~ Critical 36506.000 2999.000 «n.nuu 231.000 76.000 30.000 Total o~e"t" uou 70 e 7 z � ouzatiou(hz) Events 2.00 znu ---- ----- r ---- ---- 4.00 ------- 70 ------- ------- 3 _-__ 5.ou ---- oe ---- 6 ---- ---- x.00 ------- oo ___- ------- ------- _-__ zo.00 ---- 66 ---- ----- ---- ---- 1e.00 zs* 65 ----- ---- ---- ---- 13.00 ---- az ---- ---- ---- ---- -:4.00 ---- ou ----- ----- ---- ---- �s�on 1vu 61 ---- ---- ----- ----- za.00 ---- ao ---- ----- ---- ---- m.00 1e7 ---- ----- ---- ---- ---- 19.00 ---- so ----- ------ ---- ---- zo.00 ---- sa y ----- ---- ---- m.00 ---- ss a ---- ---- ---- ze.00 zyo so ----- ----- ---- ---- o.00 ---- 52 ---- ----- ---- ---- e4.00 ---- ov ----- ----- ---- ---- xs.00 ---- 46 ---- ----- ---- ---- os.00 1*4 m ----- n c ---- 27.00 zoa ----- ----- ----- ---- ---- oy.00 ---- 42 ----- ---- ---- ---- zo.on ---- z* ----- ------ ---- z 31.00 zou ---- ---- ----- ---- 32.00 1*1 ---- ---- ----- ---- us.00 ---- n ----- ------ ---- s«.ou 189 sa ------ ----- ---- ys.00 187 uo ---- ----- ---- sa.uu zoo ---- 7 ----- ---- 37.00 185 32 ----- ------ ---- s*.00 184 31 ----- ----- ---- «o.uo ---- xo ---- ---- ---- «a.00 183 ---- ----- « ---- oz.00 179 ---- ---- o ---- 44.00 zm uu ---- ----- ---- *s.ou ---- ez ---- ---- ---- «s.00 zn 21 ---- z � 48.00 175 zo ---- ---- «y.00 174 ____ ___- uu.00 172 ---- ---- ---- 51.00 171 ---- s ---- 52.00 on 1* ---- ---- ss.00 ---- zo ---- ----- se�ou 169 zo ---- ---- 57.00 167 ----- s ---- su.ou zou ----- ---- ---- sy.ou za« ----- ---- ---- «o.ou zos ---- ---- ----- sz.00 zau zs ---- ------ ou.uo zso z« ----- ------ az.uu ---- zs ----- ----- s«.00 157 ----- ----- ------ oo.00 zss ---- u ------ 67.00 154 ---- z 1 68.00 15e ---- ------ ov.00 150 ---- e 73.00 z«o ---- ----- 74.00 146 ------- --__- 75.00 144 ---- ---- 76.00 ---- zu ---- n.00 143 11 ---- 7*.00 z«u ---- ---- oz.00 140 ---- ----- 82.00 139 ---- ---- 83.00 zsa ---- ---- os.00 135 ---- ---- ue.00 zzs ---- ---- n».un ---- 10 ---- vo.00 ---- ---- z 91.00 132 ---- m.uon 0.009 10.000 ` I 94.00 130------- 95.00 129------- 96.00 128------- 97.00 127 9 99.00 125------- 100.00 124------- 102.00 123 8 103.00 7 104.00 122 6 105.00 ----- - 5 106.00 120------- 107.00 119------- 108.00 1_8------- 109.00 117------- 110.00 114------- 111.00 113 4 112.00 112------- 113.00 1'-------- 114.00 108------- 116.00 106 3 120.00 105 ----- - 121.00 104------- 122.00 103------- 124.00 102------- 127.00 101------- 128.00 100------- 136.00 ------- 138.00 99 141.00 98 142.00 97 146.00 95 150.00 94 151.00 93 152.00 90 155.00 88 159.00 86 166.00 85 167.00 84 167.00 83 2 Table 5. Panther Creek Wetland (Mar -May), Future land Use, Baseline Routing Time Series file:D:\21352- I-405 SPRINGBROOK CREEK\HSPF SPRINGBROOK\SPRBK.WDM DSN 1600 lH STAG -Panther Ck Wtld-Baseline-Future Values Greater than or equal Critical Total Hours Analysed:117024. Total Events Analysed:117024 Event Time Window: Period of Analysis:1.0/01./1948 - 9/30/2001 using months:MARCH to MAY Critical Value 15.000 15.500 16.000 16.500 17.000 17.500 %t>= Critical 32.431 3.564 0.520 0.249 0.116 0.048 hr>= Critical 37952.000 4171.000 609.000 291.000 136.000 56.000 Total Events 235 109 18 8 5 2 Duration(hr) Events 4.00------- 109------- 8------- 5.00------- 108 18------- ------- 6.00------- 106------- ------- ------- ------- 7.00 ----- 105 16------- ------- - --- - 8.00------- 102 14------- 5------- 9.00------- 99------- ------- ------- ------- i0.00-------------- 13------- ------- ------- 11.00------- 98------- ------- ------- ------- 12.00------- 96------- 7------- ------- 13.00------- 95 12------- 4------- 14.00------- 90 11------- ------- ------- 15.00 235 89------- ------- 16.00------- 87 10------- ------- ------- 17.00 234 85------- ------- ------- 2 18.00 231 83------- ------- ------- ------- 19.00 230 80------- 6------- ------- 20.00 229 77------- ------- ------- ------- 21.00------- 75 9------- ------- ------- 22.00 227 73------- ------- ------- ------- 23.00 226 71------- ------- ------- ------- 24.00 225 70------- ------- ------- ------- 25.00 221 67------- ------- ------- ------- 26.00 220 66------- ------- ------- ------- 27.00------- 62------- ------- ------- ------- 28.00------- 60------- ------- 3------- 29.00 ---- 56------- ------- ------•- ------- 30.00 219 53------- ------- ----- -------- 31.00 217------- 8------- ------- ------- 32.00 216 52------- ------- ------- - 33.00 214 50------- 5 ------- - 34.00------- 46------- ------- 2------- 35.00 213-------- ------- ------- ------- 36.00------- 43------- ------- ------- ------- 37.00 212------- ------- ------- ------- 38.00 211------- ------- ------- ------- ------- 39.00 210 40------- ------- ------- 40.00 207------- ------- ------- ------- 41.00 206 39 ------- --- --------- 42.00 205 36------- ------- ------- 45.00 202 35------- ------- ------- 46.00 201 34------- ------- ------- 47.00 199 31------- ------- ------- 48.00 197 29------- ------- ------- 49.00------- 27------- 4------- 50.00------- 25 7------- ------- 51.00 196 24------- 2------- 52.00------- 23------- ------- ------- 53.00 193------- ------- ------- 1 55.00------- 21-------- -•------ 56.00------- 20 6------- 57.00 192 19------- ------- 58.00 191------- ------- ------- 59.00 190------- ------- ------- 60.00 187 18------- ------- 62.00 183------- ------- ------- 63.00 182------- ------- ------- 64.00 181------- 5------- 65.00 180------- ------- ------- 66.00 178------- ------- ------- 67.00 175------- ----_.__. ------- 68.00 173 15 4------- 69.00 171 14 3------- 70.00 170------- ------- ------- 71.00 169------- 2------- 73.00 167------- ------- ------- 74.00 165------- ------- 1 75.00------- 13------- 77.00 163------- ------- 78.00 162 12------- 18.000 18.500 0.019 0.000 22.000 0.000 0 79.00 159 11------- 80.00 156 -------------- 82.00 155 -------------- 83.00 154 _..._.... .___ _..--__-- 84.00 152 -------------- 87.00 151 -------------- 88.00 150 -------------- 89.00 147 -------------- 90.00 146 - - ---------- 91.00 144 ------------- 92.00 141 -------------- 93.00 140 -------------- 94.00 139 1 96.00 138 10 97.00 137 ------- 98.00 136 ------- 99.00 133 9 100.00 131 101.00 130 ------- 102.00 ------- 8 104.00 128 ------- 105.00 127 ------- 107.00 125 7 108.00 124 ------- 109.00 123 ------- 110.00 122 5 112.00 119 ------- 113.00 118 ------- 114.00 117 ------- 116.00 115 4 117.00 114 ------- 118.00 113 ------- 119.00 112 3 120.00 111 ------- 121.00 110 ------- 124.00 109 ------- 125.00 107 ------- 126.00 106 ------- 127.00 105 ------- 129.00 104 ------- 134.00 103 ------- 135.00 ------- 2 136.00 102 ------- 137.00 101 ------- 138.00 100 ------- 142.00 99 ------- 145.00 98 ------- 148.00 97 ------- 149.00 95 ------- 150.00 94 _ 152.00 92 154.00 91 155.00 90 159.00 89 161.00 87 162.00 86 164.00 85 167.00 84 167.00 83 2 Table s. Panther creek Wetiaou (xaz-aay)' Current Land Use, Southern oi.ecoiu" Time Series cil.e.o:\21352- 1-405 Semzmnau000 cuoo^\aacF arRzxaomOnn\avaau.woM oam uwu za yzxs -evutuez c: *tld+paot.uer Ck Div --Current Values Greater than or equal Critical Total Hours ^=a-.rseu:117024. Total Events uualrnau.117024 Event Time w'cuow. Period of *nalyni`.10/01/1948 - o/zn/zooz using uootxo.aaoca to MAY Critical value 15.500 16.000 16.500 17.000 17.500 xt`~ Critical 82.684 17.215 2.819 0.e78 0.356 0.195 hc,~ Critical 967e0.000 20146.000 3299,000 793.000 417.000 228.000 Total Events zoz e79 ro 14 y o ouratio"m,> Events 2.00 ---- 279 -.'o ---- ----- ---- 5.0e ---- xm ---- ---- ----- ---- o.00 ---- ---- e* ---- ----- ---- 7.00 ---- 277 ---- w ----- -.... -- o.uo ---- e75 ---- ---- ----- ---- o.00 ---- zm ao ---- ----- ---- 10.00 ---- 273 ---- ---- ----- 6 11.00 ---- um 67 ---- ---- ---- 12.00 ---- uus os ---- ----- ---- za.on ---- uo« ---- 13 ----- ---- -:o.uo ---- 26-1 sz ---- ----- ---- zs.no ---- zsy up ---- ------ ---- 16.00 ---- 254 57 ---- ---- ---- o.00 ---- 251 ----- ---- u ---- io.00 ---- u«r 56 ---- ---- ---- 19.00 ---- 243 s« ----- ---- ---- zo.00 ---- 237 sz ---- ---- s e1.00 ---- zsz 51 ---- o ---- uu.oe ----- euo su ----- ------ ---- uu.00 ----- uus oo ---- ----- ---- 24.00 ---- zuo 46 ----- r ---- uu.00 ---- oz* os ----- ----- ---- zo.no ---- 213 42 ----- ----- ---- 27.00 ---- 203 40 ---- ----- ---- oo.uo ---- uuz ---- zz ---- ---- u*.ou ---- 194 ------ ----- ---- ---- xo.uo ---- 191 ao ---- ---- ----- az.00 ---- zov ----- zz ----- ----- az.no ---- 184 ---- ---- s ----- 33.00 ---- 1e1 sr ---- ----- ---- 34.00 ---- 179 ---- ---- ----- ---- 35.00 ---- zrr ---- ____ _____ ____ sx.00 ---' 174 zo zo ----- ----- 37.00 ---- 172 ss ---- ---- ---- m.00 ---- zoy ------ ---- ----- ---- 39.00 ---- zs^ ---- ---- ----- ---- 40.00 ---- zaz ---- ---- ---- ---- «z.00 ---- zaz uu y ----- ^ 43.00 zoo zsz 31 o ---- z *4.e0 ---- 150 e9 ---- ----- ---- «s.ov ---- 143 on ----- 5 ---- «e.00 zoo ---- uo ---- ---- ---- *7.00 ---- 142 24 ----- ---- e 48.00 oy 139 ---- ----- ---- ---- 4y.uu ---- zo o ----- ----- ---- 50.00 ----- 132 uc ---- ---- ---- 51.00 ---- 131 ---- ---- ---- ---- se.00 ------ 128 21 ---- ---- ---- a.uo yo 125 zo ---- ---- ---- s«.uo ------ 12* ---- ---- ----- ---- 55.00 _____ oz ---- ---- ---- ----- so.uo ----- ---- 19 ---- ----- ---- 57.00 ------- 121 ------- ------- ------- ____ so.uo ---- ---- zo ---- ---- ---- sy.ou 97 ---- zr ---- ----- ---- xo.00 ---- 120 ---- ---- ---- ---- oz.ou ---- 117 16 ---- ----- ---- 62.00 ---- oo ---- ---- ---- ---- na.ou ---- 112 ---- ---- * ---- 64.00 ---- Ill ---- ---- s ---- xs.uo ---- 108 15 ---- ---- ---- 66.00 ---- zoa ---- ---- z ---- 67.00 ---- ---- ---- ------ ------- � xo.ou ---- mz 14 ----- ----- oy.00 ys zou 13 ---- ---- m.uo ---- mz ---- ----- ---- 71.00 ---- zoo ---- ---- ---- 72.00 ---- 99 ---- ---- ---- m.uo ---- 98 12 ---- ---- zo.uoo 18.500 19.000 0.079 0.028 0.000 93.000 33.000 0.000 s 1 o ------- ------- ------- ______ ____ ____ ____ _____ ____ ____ ----- ------- ----- ------- ------- _____ z------ ____ ____ ____ ____ ____ _____ ____ ____ _____ ____ ____ _____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ _____ _____ _____ ____ _____ ____ ____ z------- ------- ____ ____ ____ ---- z 76.00------- 97 ------- 7------- 77.00------- 95 -------------- ------- 78.00------- 94 ------- 6------- 79.00 --- 93 ------- 5 -....----- 80.00------- 90 11------- ------- 81.00 - ----- 88 10------- ------- 82.00------- 85 -------------- ------- 83.00------- 84 -------------- ------- 84.00 -- ---- ------- ------- 4 -- --- 85.00 95 ------- ------- ------- 86.00-------- 83 ------- 3 89.00 - 82 -------------- 90.00------- 81 -------------- 91.00------- 79 -------------- 92.00------- 78 -------------- 93.00 ------- 77 -------------- 95.00------- 76 -------------- 96.00------- 75 -------------- 97.00------- 72 -------------- 98.00 94 ------- -------------- 101.00------- ------- 9------- 104.00 93 ------- -------------- 105.00------- 71 ------- 1 106.00------- 69 ------- 107.00 91 67 8 108.00------- 66 ------- 109.00------- 64 ---- -- 111.00------- 62 ------- 112.00------- 61 ------- 113.00------- 60 ------- 114.00------- 59 7 115.00------- 58 6 116.00------- 57 5 118.00 ------- 55 ------- 120.00------- 54 ------- 121.00------- 53 ------- 125.00 ------- 51 4 127.00 __.____._ 50 ---_--- 128.00 ------- 49 ------- 129.00------- 48 ------- 131.00 ------- 47 ------- 132.00 ------- 45 ------- 134.00------- 44 ------- 135.00 -------- 43 ------- 136.00 90 ------- ------- 137.00 88 42 ------- 139.00 ------- 41 ------- 142.00 ------- 39 ------- 144.00 ------- 38 ------- 147.00 ------- 36 ------- 148.00 87 ------- ------- 150.00------- 34 ------- 151.00 86 33 ------- 154.00 ------- 32 ------- 155.00------- 30 3 156.00 84 ------- ------- 162.00 _______ ------- 2 163.00------- 28 ------- 164.00------- 27 ------- 165.00 83 ------- ------- 166.00 ------- 26 ------- 167.00------- 25 ------- 167.00 82 24 1 2 Table 7. Panther Creek Wetland (Mar -May), Future Tand Use, Southern Diversion Time Series file:D:\21352- I-405 SPRINGBROOK CREEK\HSPF SPRINGBROOK\SPRBK.WDM DSN 3600 1H STAG -Panther Ck Wtld-Panther Ck Div -Future Values Greater than or equal Critical Total Hours Analysed:11_7024. Total Events Analysed:117024 Event Time Window: Period of Analysis:10/01/1948 - 9/30/2001 using months:MARCH to MAY Critical Value 15.000 15.500 16.000 16.500 17.000 17.500 %t>= Critical 73.847 18.789 3.802 1.000 0.414 0.244 hr>= Critical 86419.000 21988.000 4449.000 1170.000 485.000 286.000 Total Events 159 328 109 33 10 7 Duration(hr) Events 2.00-------------- ------- 33------- ------- 3.00-------------- ------- ------- ------- 5.00------- 328 109------- ------- ------- 6.00------- 326 ---- - 32------- ------- 7.00-------------- 106 31------- ------- 8.00------- 325 104 30------- ------- 9.00------- 321 99 27------- ------- 10.00------- 316 98 26------- ------- ------- ------- 314 97 25------- 7 -2.00------- 307 94------- ------- ------- 13.00------- 301 92 24------- ------- 14.G0 297 90 23------- ------- 15.00------- 293------- 22------- ------- 16.00------- 290 89 21------- ------- ------- ------- 284 86 -------- ------- ------- 18.00------- 278 83 19------- 6 19.00------- 274 79 18 10------- 20.00------- 270 74 17------- ------- 21.00------- 264 71------- ------- ------- 22.00------- 258------- 16------- ------- 23.00------- 252------- ---------- ------- 24.00------- 248 67 14------- ------- 25.00------- 245 65------- 9------- 26.00 159 240 63------- 8------- 27.00------- 236 59------- ------- ------- 28.00------- 232 56 ------- ------- ------- 29.00------- 229 --- --- -------- ------- ------- 30.00------- 221 54------- ------- ------- 31.00------- 219 52------- 7 5 32.00------- 215 49------- ------- ------- 33.00------- 207------- ------- ------- ------- 34.00 158 203 43------- ------- ------- 35.00------- 197------- ------- ------- ------- 36.00 157 189------- ------- ------- ------- 37.00------- 42------- ------- ------- 38.00 ------- 180------- ------- ------- ------- 39.00------- 176------- ------- 6------- 40.00------- 174 41------- ------- ------- 41.00------- 172 40------- ------- ------- 42.00------- 170------- 13------- ------- 43.00------- 168 39 12------- ------- 44.00------- 165 38 11------- ------- 45.00------- 162 ----- -------- ------- ------- 46.00------- 154------- ------- ------- ------- 47.00------- 152------- ------- ------- ------- 48.00 156 150------- 10------- ------- 49.00------- 147 36------- ------- 4 50.00------- 145 31 ------- 5------- 51.00 155 143 29------- ------- 3 52.00-------------- 26------- ------- ------- 53.00------- 138------- ------- ------- 2 54.00------- 133 25 8------- ------- 55.00------- 130 23------- ------- ------- 56.00------- 127------- ------- ------- ------- 57.00-------------- 21 --- ---------- ------- 58.00------- 125------- ------- ------- ------- 59.00------- 124------- ------- ------- ------- 60.00------- 122 20------- ------- ------- 61.00------- 120------- ------- ------- ------- 62.00------- 119 19------- ------- ------- 63.00------- 117 17--------- ------- ------- 64.00------- 116 ------- ------- ------- ------- 65.00------- 115 16------- ------- ------- 66.00 154 114------- ------- ------- ------- 67.00------- 113------- ------- ------- ------- 68.00------- 109------- - ----- 4------- 69.00-------------- ------- ------- 3------- 70.00------- 108------- ------- ------- ------- 71.00 106------- ------- ------- ------- 18.000 18.500 19.000 0.104 0.046 0.021 122.000 54.000 24.000 4 2 1 4 3 2 1 2 72.00 ------- 104 -------------- ------- 73.00 ------- 102 15------- ------- 74.00 153 101 14------- ------- 75.00 100 -------------- ------- 76.00 152 ------- -------------- ------- 77.00 ------- 98 -------------- ------- 78.00 ------- 97 -------------- ------- 79.00 ------- 95 ------- 7------- 80.00 ------- 94 -------------- ------- 82.00 151. 93 ------- 6------- 83.00 150 92 13------- ------- 84.00 148 - -------------- ------- 85.00 ------- 89 10------- ------- 86.00 ------- 88 ------- 5------- 87.00 -------- 86 ------- 4------- 88.00 147 84 ------- ----- - ------ 89.00 ------- ------- -------------- ' 90.00 ------- 83 -------------- 91.00 146 ------- -------------- 9.3.00 ------- 82 -------------- 94.00 - - --- 80 ------- 2 95.00 144 ------- -------------- 96.00 142 79 -------------- 97.00 141 77 -------------- 99.00 140 76 -------------- 102.00 ------- 75 -------------- 103.00 ------- 73 ----- - --- --- 105.00 ------- 70 -------------- 106.00 139 69 -------------- 107.00 ------- 68 9------- 108.00 ------- ------- 8 1 109.00 ------- 66 ------- 110.00 ------- 63 ------- 112.00 ------- 62 ------- 113.00 ------- 61 ------- 114.00 138 60 ------- 116.00 137 ------- 7 117.00 ------ 58 ------- 118.00 ------- 57 6 119.00 - 56 ------- 120.00 ------- ------- 5 121.00 ------- 55 ------- 122.00 136 ------- ------- 124.00 ---- -- 54 ------- 125.00 135 52 ------- 127.00 ------- 51 4 128.00 ------- 50 ------- 129.00 134 ------- ------- 130.00 133 ------- ------- 132.00 ------- 47 ------- 133.00 132 ------- ------- 134.00 ------- 46 ------- 137.00 ------- 44 ------- 138.00 131 ------- ------- 139.00 ------- 43 ------- 141.00 129 42 ------- 142.00 ------- 40 ------- 144.00 128 39 ------- 145.00 127 ------- ------- 147.00 ------- 38 - - -- 148.00 ------- 37 ------ 149.00 125 ------- -------- 151.00 124 36 ------- 152.00 ------- 33 ------- 154.00 123 ------- ------- 156.00 122 -------- ------- 1 7.00 121 ------- ------- 159.00 118 32 ------- 161.00 ------- 3 162.00 ------- 30 ------- 163.00 - 29 ------- 165.00 ------- 28 ------- 166.00 ------- 27 2 167.00 117 26 1 a 2 Table 8. Panther Creek Wetland (Mar -May), Current-, Land Use, Northern and Southern Diversions Time Series fi--,°.o.\21352- 1-405 oruzmunaooK Cuooa\ayrr opmzmnomCou\sroas.wox nam 4600 zo szas -Panther ck wtlu-pa=t.xez&m^lzio«ualo oi.-oo=re" Values Greater than or equal czitio^z Total an"zs v"a'vaeu:117024. Total o"eota uoal'roeu.117024 Event Time Window: eez.ioa of xnazvnia.m/ol'/zn«u - 9/30/2001 uvInw uootus.aascu to MAY Critical Value 16.500 17.000 17.500 18.000 18.500 z*.00u 19.500 ^t,~ Critical 2.093 o.a«o 0.516 0.3*7 0.212 o.ziz 0.058 hr`~ Critical 2449.000 983.000 oo«.000 406.000 z«o.uoo 1,30.000 68.000 rotal u,euto 48 xo 11 o « s c ou=ation(ur) o.e"t, 2.00 ---- 20 ---- ---- ---- ---- ---- x.00 ---- ----- ----- ---- ----- s ---- 5.00 «o ------- li ------- ------- ------- ___- o.ou 47 zy ----- ----- ---- * ----- o.ov ----- zu ---- ----- ----- ---- ---- o.00 os ----- ----- ----- ------ ---- ---- 10.00 «s 17 ---- ---- ---- ---- ---- 11.00 ---- ----- ---- o ----- ---- ---- 12.00 o« ----- ----- ---- a ---- ----- za.na ----- za ----- ------ ---- ----- ---- z«.00 43 ----- ----- ---- ---- ---- ---- is.00 «z 14 ----- ---- ----- ---- ___- 16.00 ----- ----- 10 ----- ---- ---- ---- 17.00 41: ---- ----- ---- ----- ---- ---- zo.on ao ----- ----- ------ ---- ---- ----- uu.00 38 ----- ----- ---- ------ ---- ---- e1.00 ----- ----- ----- ----- ---- ---- 2 22.00 ----- 13 ----- n ---- ---- ----- 23.00 37 ------- ------- 7 ------- ------- _--_- 25.00 ao ----- ----- ----- s ---- ----- ua.00 35 ----- v ----- ----- ---- ----- e7.00 a« ----- ----- ----- ---- 3 ----- eu.00 sa ----- ----- ----- ---- ---- ----- uy.00 »11 ---- ----- ----- ---- ---- ------ 31.00 co ---- ----- x ---- ---- ----- ac.00 zu ----- ------ ----- ---- ---- ------ 33.00 27 ----- ----- ---- ---- ----- ------ so.00 26 ----- ----- ------- ---- ------ ----- 35.00 ----- ----- o ---- ---- ---- ----- zo.00 ----- 12 ---- ----- ---- z ---- 37.00 zs ----- ------ ----- ----- ----- ---- zu.00 uu ------ ----- ------ ----- ------ ---- ^u.uo uz ----- ----- ------ ----- ---- ---- 42.00 z� ----- ----- ------ ---- ------ ---- «o.uu -.n ----- ----- s ----- ---- ---- «x.uu ----- zz ----- ---- o ---- ---- 47.00 ---- zo ----- ----- a ---- � su.00 ------ ----- ------- ----- c ---- uz.nn ----- 9 r ----- ---- ---- su.00 zr ----- ---- ---- ---- ---- no.on ----- ------- ____ ____ ____ � a2.ou z� ---- ---- ---- ---- 63.00 14 ------- -------- « --__- 64.00 ----- ------ ----- z ---- os.uu zs ----- ----- ------ ----- 67.00 zz ----- ----- ----- ----- oo.00 ---- ----- a ----- � r1.00 ----- ----- s ----- rc.00 ----- ----- ----- 7ti.00 10 ------- ------- ___- 77.00 ------- ------- « --__- 78.00 ----- ----- 3 ---- oo.00 ------ ----- 2 ---- a«.00 ----- ----- ---- � os.00 ---- 7 ----- 90.00 ------ s ----- 92.00 ----- s ---- 93.00 p u ---- 97.00 ---- ----- z 1os.ou u ----- lzo.00 7 ----- 111.00 s ----- zzo.00 « ----- z-:o.00 3 ----- 119.00 ---- z z42.00 2 167.00 z Table 9. Panther Creek Wetland (Mar -May), Future Land Use, Northern and Southern Diversions Time Series file:D:\21352- I-405 SP'RINGBROOK CREEK\HSPF SPRINGBROOK\SPRBK.WDM DSN 5600 1H STAG -Panther Ck Wtld-Panther&RollingHills Div -Future Values Greater than or equal Critical Total Hours Analvsed:117024. Total Events Analysed:117024 Event Time W: ndow: Period of Anaiys.s:10/01/1948 - 9/30/2001 using months:NLARCH to MAY Critical Value 17.000 17.500 18.000 18.500 19.000 19.500 20.000 %t>= Critical 1.259 0.632 0.408 0.261 O.i68 0.085 0.048 hr>= Critical. 1473.000 740.000 478.000 306.000 197.000 100.000 56.000 Total Events 35 16 10 7 7 3 2 Duration(hr) Events 3.00--------------------- ------- 7------- ------- 5.00------- 16 ------- ------- ------- ------- 7.00 35 15------- ------- ------- ------- ------- 8.00------- 14------- ------- ------- ------- ------- 9.00 34-------------- ------- ------- ------- 1o.eo 32-------------- ------- ------- ------- 12.00 31------- 7 6------- 14.00 30-------------- ------- ------- ------- - 15.00 29 13------- ------- ------- ------- 2 16.00 27-------------- ------- ------- ------- 17.00 26-------------- ------- ------- ------- ------- 18.00-------------- 10------- ------- ------- ------- 19.00--------------------- ------- 5------- ------- 20.00 25-------------- ------- ------- ------- ------- 21.00 ---- -- 12 -- - -------- ------- 3------- 22.00 24-------------- ------- 4------- -------- 23.00 21------- 9------- ------- ------- ---- -- 24.00 20-------------- 6------- ------- ------- 25.00 -.9------- 8------- ------- ------- ------- 26.00------- 11------- ------- ------- ------- ------- 27.e0 18 ------------- ------- ------- ------..... ------- 28.00 17 10------- ------- ------- 2------- 30.00 16-------------- ------- ------- ------- ------- 31.00 '- 32.00-------------- 7------- ------- ------- ------- 35.00 -- - -------- ------- 5------- ------- ------- 36.00--......--- 9------- ------- ------- ------- ------- 37.00------- 8------- ------- ------- ------- ------- 38.00--------------------- ------- 3------- ------- 40.00-------------- 6------- ------- ------- ------- 41.00--------------------- ------- 2------- 47.00 14-------------- ------- ------- ------- 50.00-------------- 5------- ------- ------- 51.00 13-------------- ------- ------- 52.00 12-------------- ------- ------- 53.00 11-------------- 4 ------- 54.00--------------------- 2------- 55.00 10-------------- ------- ------- 62.00--------------------- ------- 66.00 9------- 4------- 67.00-------------- 3------- 69.00-------------- 2------- 71.00------- ' -- _-------- 72.00------- 6-------- ------- 75.00------- 5------- - 76.00 8-------------- 79.00------- 4------- 81.00------- 2------- 88.00 7 _.__.__ 1 92.00 6 - ----- 93.00 4------- 94.00 3------- 100.00 _ 103.00 2 113.00 7 20.500 0.026 30.000 21.000 0.016 19.000 1 Table 10. Panther Creek Wetland (Jun -Aug), Current Land Use, Baseline Routing Time Series file:D:\21352- I-405 SPRINGBROOK CREEK\HSPF SPRINGBROOK\SPRBK.WDM DSN 600 1H STAG -Panther Ck Wtld-Baseline-Current Values Greater than or equal Critical Total Hours Analvsed:117024. Total Events Analysed:117024 Event Time Window: Period of Analysis:1.0/01/.1.948 - 9/30/2001 using months:JUNE to AUGUST Critical Value 14.500 15.000 15.500 %t>- Critical 31.112 1.903 0.061 hr>= Critical 36409.000 2227.000 71.000 Total Events 87 25 4 Duration(hr) Events 5.00 87-------------- 6.00-------------- 4 11.00------- 25------- 12.00 3 21.00------- 24------- 22.00 86-------------- 24.00------- - 2 28.00------- 23------- 29.00------- 22 1 32.00------- 21 34.00------- 20 40.00 85------- 45.00------- 19 48.00 84 ------- 50.00 -- ---- 18 58.00------- 17 62.00------- 16 63.00------- 15 66.00 83------- 71.00 13 76.00 82 ------ 79.00 81------- 83.00------- 12 86.00 - 11 88.00 79------- 90.00 - ---- 10 91..00 78 9 96.00 76------- 98.00 73------- 99.00 72------- 101.00------- 8 107.00 71 7 108.00 70------- 11L00 69------- 113.00 68------- 125.00 67------- 137.00------- 6 143.00 66------- 144.00 65------- 148.00 64------- 157.00------- 5 158.00 63------- 162.00 -- --- 4 164.00 61.------- 167.00------- 3 167.00 60 2 Table 11. Panther Creek Wetland (Jun -Aug), Future Land Use, Baseline Routing Time Series file:D:\21352- 1-405 SPRINGBROOK CREEK\HSPF SPRINGBROOK\SPRBK.WDM DSN 1600 1H STAG -Panther Ck Wt.ld--Baseline-Future Values Greater than or equal Critical Total Hours Ana'_ysed:117024. Total Events Analysed:117024 Event Time Window: Period of Analysis:10/01/1948 - 9/30/2001 using months:JUNE to AUGUST Critical Value 14.500 15.000 15.500 ;t>= Critical 31.528 4.030 0.355 hr>= Critical 36895.000 4716.000 415.000 'Total Events 103 52 23 Duration(hr) Events 6.00------- ------- 23 8.00------- ------- 21 9.00------- ------- 20 11.00 ------ ------- 17 12.00 -- ----------- 15 13.00------- ------- 12 14.00------- 52------- 16.00------- ------- 11 17.00------- 50 9 18.00------- 49 _..--- 19.00------- ------- 8 20.00------- ------- 7 21.00------- 47------- 26.00------- ------- 6 27.00 103 46------- 28.00------- ------- 5 29.00------- ------- 3 36.00 102------- ------- 41.00 101------- ------- 43.00------- 45------- 44.00 100 ----- -------- 45.00------- 44------- 46.00------- 43 2 47.00 99------- ------- 50.00------- 42------- 51.00 98------- ------- 52.00 97------- 1 56.00 96------- 57.00 95 41 63.00 94 40 64.00------- 39 65.00 93 ------ 66.00 92------- 67.00------- 38 68.00------- 34 71.00------- 33 73.00------- 32 76.00------- 29 79.00------- 28 80.00------- 27 81.00 91------- 82.00------- 26 84.00------- 24 86.00 90 23 87.00------- 22 90.00 89 21 94.00------- 20 97.00------- 19 98.00 88------- 99.00 86------- 101.00------- 18 104.00------- 17 105.00 85 14 112.00------- 13 115.00 84------- 118.00------- 12 121.00 83------- 129.00 82------- 130.00------- li 133.00------- 10 137.00 80------- 141.00 79------- 142.00------- 9 144.00------- 8 148.00 78------- 150.00------- 7 154.00 77 6 156.00 76------- 164.00------- 5 16.000 16.500 0.008 0.000 9.000 0.000 1 0 165.00 4 166.00 75------- 167.00 74 3 Time Series file:D:\21352- I-405 SPRINGBRCOK CREEK\HSPF SPRINGBROOK\SPRBK.WDM DSN 2600 1H STAG -Panther Ck Wtld-Panther Ck Div -Current Values Greater than or equal Critical Table 1_2. Panther Creek Wetland (Jun -Aug), Current :and Use, Southern Diversion Total Hours Analvsed:117024. Total Events Analysed-117024 Event Time Window: Period of Analysis:10/0111948 - 9/30/2001 using months:JUNE to AUGUST Critical Value i4.500 15.000 15.500 16.000 16.500 %t>= Critical 99.117 21.698 1.754 0.085 0.000 hr>= Critical 115991.000 25392,000 2053.000 99.000 0.000 Total Events 6 162 62 6 0 Duration(hr) Events 4.00-------------- 62 6 5.00--------------------- 5 6.00-------------- 60------- 8.00 - ------ -- ---- 59------- 9.00-------------- 56------- 11.00-------------- 53 3 12.00------- 162 52------- 13.00------- - 50------- 14.00------- 161___.._...-- 15.00------- ------- 160 ---......- -------- 16.00-------------- 48------- 17.00-------------- 47------- ------- -------------- 44------- 19.00-------------- 42 - 20.00-------------- 40------- 21.00------- 159 39------- 22.00------- ------- 38------- 23.00------- 156 36 - 24.00-------------- 34------- 25.00-------------- 33------- 26.00-------------- 32------- 27.00------- 1.54 31------- 28.00------- 153------- 29.00------- 152 28------- 30.00-------------- 26------- 32.00 ----- 151 24 ----- -- 33.00-------------- 22------- 34.00-------------- 21 2 35.00-------------- 19------- 36.00------- 149------- ------- 38.00------- 148------- ------- 40.00------- 146 18 1 41.00-------------- 17 45.00 ----- - 145------- 47.00------- 143------- 48.00------- 142 14 49.00------- 141 12 50.00-------------- 11 51.00------- 140 10 53.00------- 139------- 54.00------- 138------- 56.00-------------- 9 57.00------- 137------- 58.00 ----- - 136------- 60.00 ---- -- 134------- 63.00-------------- 8 66.00------- 133------- 67.00------- 131 7 71.00------- 129 72.00------- 128-------- 74.00------- 127------- 75.00------- 126------- 77.00------- 125------- 79.00------- 124 6 80.00---._....--------- 5 81.00------- 123------- 82.00------- 122------- 86.00------- 121 87.00------- 120------- 91.00------- 119------- 93.00 --------------- 4 94.00 ------- 118------- 95.00------- 117------- 97.00------- 115------- 98.00------- 114 3 99.00--__.___ 113------- 100.00------- 112 2 101.00------- 110------- 106.00------- 109------- 108.00 6 110.00------- 111.00------- 112.00------- 113.00------- 115.00------- 117.00------- 118.00------- 119.00------- 120.00 --- --- 121.00------- 122.00------- 123.00------- 126.00------- 127.00------- 129.00------- 130.00------- 131.00------- 132.00------- 135.00------- 136.00 - --- 137.00------- 139.00------- 143.00------- 145.00------- 150.00------- 156.00------- 157.00------- 167.00------- 167.00 5 108 106 104 103 101 98 97 96 95 94 93 92 90 88 86 84 83 80 79 78 76 73 70 68 66 65 64 63 61 2 Table 13. Panther Creek Wetland (Jan -Aug), Future Land Use, Southern Diversion Time Series file:D:\21352- I-405 SPRINGBROOK CREEK\HSPF SPRINGBRCOK\SPRBK.WDM USN 3600 1H STAG -Panther Ck Wtld-Panther C.k Div -Future Values Greater than or equal Critical Total 'lours Analv3ed:117024. Total Events Analysed:117024 Event Time Window: Period of Analysis:10/01/1948 - 9/30/2001 using months:JUNE to AUGUST Critical Value 14.500 15.000 15.500 16.000 16.500 17.000 `fit>= Critical 92.063 20.451 2.707 0.414 0.036 0.000 hr>= Critical 107736.000 23932.000 3168.000 485.000 42.000 0.000 Total Events 30 161 91 27 2 0 Duration(hr) Events 2.00------- 161 - ------- ------- 3.00--------------------- 27------- 4.00--------------------- 26------- 5.00 - ........._..------- 91 25------- 6.00 ---- -------- 88------- ------- 7.00--------------- 87 24------- 8.00-------------- 86 23------- 9.00-------------- 85 21------- 10.00-------------- 81 20------- ------- ------- - 74 19 - 12.00-------------- 73 18------- 13.00-------------- 72 16------- 14.00------- 160 70------- - 15.00--------------------- 15------- 16.00--------- ------- 68------- ------- 17.00-------------- 66------- ------- 18.00-------------- 64------- ------- 19.00------- 159 63 12------- 20.00-------------- 61------- ------- 21.00------- 157 59------- 2 22.00-------------- 57 10 23.00-------------- 56------- 24.00-------------- 54 7 25.00------- 155 53------- 26.00-------------- 51 5 27.00 ------------- 50 3 may. l ------- _______ 7 y_____-_ 30.00------- 154 45------- 31.00------- 152 43------- 32.00------- 150 41------- 33.00-------------- 40------- 36.00 ------ 149 36 ------- 38.00-------------- 34------- 39.00 ------------- 33------- 40.00------- 147 30------- 41.00------- 146 28------- 42.00-------------- 26------- 43.00 ------- ------- 20 __....__.__. 45.00------- 145 24------- 46.00-------------- 23------- 47.00------- 144 ------- ------- 48.00------- 143 21------- 49.00 ------ 142------- 2 50.00 _____._.... 140 19 _______ 52.00------- 139------- ------- 53.00-------------- 17------- 54.00------- 138 16------- 56.00------- 137------- ------- 57.00-------------- 15------- 58.00------- ------- 14 60.00-------------- 13 62.00 136 12 63.00------- 135------- 67.00 ------- ------- 11 68.00---•--- 134 10 69.00------- 133 9 70.00------- 132------- 72.00-------------- 8 73.00------- 130 7 77.00------- 12.9 ------ 80.00------- 128--._...-- 81.00------- 125------- 83.00------- 124------- 86.00------- 123------- 87.00------- 121------- 89.00 30 119------- 90.00-------------- 6 92.00------- 118------- 94.00 ------- 116------- 98.00------- 115------- 99.00------- 114 5 100.00------- 113 4 101.00------- 111------- 104.00------- 110------- 105.00------- 109 3 107.00------- 108------- 108.00------- 107------- 109.00------- 105 - ----- 110.00------- 104 ------ 113.00------- 102------- 114.00------- 100 2 115.00------- 99------- 116.00------- 98------- 117.00 ------- 97------- 118.00------- 96------- 119.00 ------- 94------- 120.00 ------- 93------- 121.00 ------- 92------- 123.00 ------- 90------- 124.00------- 87------- 125.00 ------- 84------- 126.00------- 83------- 127.00 ------- 81------- 128.00 ------- 80------- 129.00------- 79------- 130.00 ------- 78------- 133.00 ------- 74------- 135.00 - 73------- 136.00------- 70------- 138.00 ------- 68------- 142.00 ------- 67------- 144.00 ------- 65 1 146.00 ------- 64 147.00 ------- 63 149.00 ------- 62 151.00 ------- 61 152.00 ------- 60 156.00 ------- 58 160.00 ------- 57 161.00 ------- 56 166.00 ------- 53 167.00 29 52 2 Table 14. Panther Creek Wetland (Jun -Aug), Current -land Use, Norther^. and Southern Diversions Time Series file:D:\21352- I-405 SPRINGBROOK CREEK\HSPF SPRINGBROOK\SPRBK.WDM DSN 4600 1H STAG -=anther Ck Wtld-Panther&RollingHills Div -Curren Values Greater than or equal Critical Total Hours Analysed:117024. Total Events Analysed:117024 Event Time Window: Period of Anaiysis:10/01/1948 - 9/30/2001 using months:JUNE to AUGUST Critical Value 14.500 15.000 15.500 16.000 16.500 17.000 %t>= Critical 100.000 48.219 3.310 0.567 0.054 0.000 hr>= Critical 117024.000 56428.000 3874.000 664.000 63.000 0.000 Total Events i135 109 29 2 0 Duration(hr) Events 1.00-------------- 109------- 5.00-------------- 108------- ------- 6.00-------------- 107 29 7.00------- - 106 28------- 8.00-------------- 102 26------- 9 n0--------------------- 25------- 10.00-------------- 98 24------- 11.00-------------- 94 23------- 12.00-------------- 93 22------- 13.00-------------- 91 21------- 14.00-------------- 89 20------- 15.00-------------- 85 18------- 16.00-------------- 83 17------- 17.00-------------- 78 16------- 18.00-------------- 75 15------- 19.00--------------------- 14 ------- 20.00-------------- 72------- ------- 21.00-------------- "70------- ------- 22.00-------------- 69------- ------- 23.00-------------- 65 12------- 24.00 ------------ 63 11 -----___ 25.00-------------- 60 10------- 26.00-------------- 58------- 27.00-------------- 56 8 - 29.00-------------- 55 6------- 30.00-------------- 50------- 2 31.00------- - - --- 49 5------- 32.00------- ------ 48------- ------- 33.00--------------------- ------- 34.00------- 135 43------- 35.00-------------- 42------- 36.00------- -- ..-...__, 41------- 37.00-------------- 40------- 38.00-------------- 38 4 39.00-------------- 36------- 41.00-------------- 34------- 42.00-------------- 33------- 43.00-------------- 3'.------- 44.00-------------- 30------- 45.00-------------- 29------- 46.00-------------- 28------- 47.00-------------- 27------- 49.00-------------- 25 ------ 50.00------- 134 24------- 51.00-------------- 23------- 53.00------- 132------- ------- 54.00-------------- 19------- 55.00-------------- 18------- 56.00 -------------- 17------- 57.00--------------------- 3 58.00------- 131------- ------- 59.00-------------- 16------- 61.00------- 130------- ------- 62.00------- 129 15------- 64.00 -- ----------- 14 ------- 66.00-------------- 13------- 69.00------- 128------- ------- 70.00------- 127------- 2 72.00-------------- 12------- 73.00--------------------- 1 74.00-------------- 11 75.00-------------- 10 79.00 80.00-------------- 8 81.00------- 126------- 91.00------- 124 ---- -- 94.00------- 123------- 97.00-------------- 7 99.00------- 122------- 17.500 0.000 0.000 0 101.00------- ------- 6 102.00------- 121------- 103.00------- 120------- 105.00------- 118------- 107.00------- 117------- 108.00------- 116------- 109.00------- 115------- 110.00------- 114------- 112.00------- ------- 5 1 .4. 00------- 113-- 116.00------- 112----•___ 117.00------- 111 4 118.00------- 110------- 127.00------- 109------- 128.00------- 108 ------ 129.00------- 107------- 132.00------- 106------- 133.00------- 105------- 137.00------- 104------- 140.00------- 102------- 141.00------- 100 ---- - 142.00------- ------- 2 143.00------- 99------- 150.00------- 98------- 152.00------- 97------- 153.00------- ------- 1 154.00------- 95 160.00------- 93 161.00------- 92 162.00 - 90 165.00------- 89 166.00------- 88 167.00------- 87 167.00 1 86 2 Table 15. Panther Creek Wetland (Jun -Aug), Future Land Use, Northern and Southern Diversions Time Series file:D:\21352- I-405 SPRINGBROOK CREEK\HSPF SPRINGBRCOK\SPRBK.WDM DSN 5600 11H STAG -Panther Ck Wtld-Pant.):er&RollingHills Div -Future Values Greater than or equal Critical Total Hours Analvsed:117024. Total Events Analysed:117024 Event Time Window: Period of Anaiysis:10/01/1948 - 9/30/2001 using months:JUNE to AUGUST Critical Value 14.500 15.000 15.500 16.000 16.500 17.000 17.500 18.000 %t>= Critical 100.000 31.016 4.898 1.247 0.324 0.067 0.015 0.000 hr>= Critical 117024.000 36296.000 5732.000 1-459.000 379.000 78.000 17.000 0.000 Total Events 181 153 53 22 6 2 0 Duration(hr) Events 1.00-------------- 153 ------- 22------- ------- 2.00-------------- 152 -------------- ------- ------- 4.00-------------- 151 53 21 6------- 5.00 --- - - ---- 150 51------- 4 2 6.00------- 181------- 48------- 3------- 7.00 -------------- 149 45 19------- ------- 8.00-------------- 145 41------- ------- ------- 9.00-------------- 144 ------- 18------- ------- 10.00-------------- 1.40 -------------- ------- ------- 11.00-------------- 136 --------------- ------- ------ 12.00-------------- 131 ------- 16------- 1 13.00-------------- 129 39 14 ------- 14.00-------------- 124 38 13------- 15.00-------------- 123 36 12------- 16.00-------------- 117 35 10------- 17.00 -------------- 115 34------- ------- 18.00-------------- 110 30 9------- 19.00-------------- 107 28 8------- 20.00 -------- 105 ------- 7------- 21.00------- 102 27 6------- 22.00-------------- 98 -------------- ------- 23.00--------------------- 24 4------- 24.00-------------- 94 23------- ------- 25.00-------------- 88 21------- ------- 26.00------- 180 87 20 3------- 27.00 ---- -- 179 83 19 --- -------- 28.00------- 80 -------------- ------- 29.00-------------- 18 -------------- 2 30.00-------------- 74 18------- + 31.00-------------- 73 15------- 32.00-------------- 71 14------- 33.00------- ---- -- 67 -------------- 34.00------- 178 64 -------------- 35.00------- 177 61 -------------- 36.00-------------- 60 -------------- 37.00------- 176 56 -------------- 38.00-------------- 55 13------- 39.00-------------- --- --- 12------- 40.00-------------- 54 .------------- 41.00------- 175 53 11------- 42.00-------------- 51 -------------- 43.00-------------- 50 -------------- 44.00------- _._....--- 48 10------- 45.00------- -- ---- 47 9------- 46.00------- 174 45 ------- 2 47.00-------------- 44 -------- 48.00------- 173 42 8------- 50.00-------------- 41 -------------- 51.00-------------- 40 7------- 52.00 ------- 171 39 -------------- 53.00------- 169 37 -------------- 54.00------- 168 35 - 1 55.00-------------- 34 ------- 56.00-------------- 33 ------- 57.00---------------- 32 ------- 58.00-------------- 31 ------- 59.00-------------- 30 ------- 60.00------- 167 29 ------- 61.00------- 165 28 ------- 62.00-------------- 26 -- --- 63.00-------------- 25 ------- 65.00-------------- 24 ------- 66.00-------------- 23 ------- 67.00--------------------- 6 68.00-------------- 21 ------- 69.00------- 164------- ------- 70.00------- 162 20 ------- 71.00-------------- 19 ------- 72.00-------------- 18 ------- 73.00 ------- ------- 5 75.00------- ------- 16 4 76.00------- ------- 15------- 79.00- - - - - - - - - - - - - - 19 ---- ..... 80.00------- 161 -------------- 81.00------- ------- 13------- 82.00------- ------- 12 3 83.00------- 160 -------------- 84.00------- 159 11------- 85.00------- 1.58 -- ----------- 86.00------- ------- 10------- 88.00 157 9------- 89.00------- 155 -------------- 90.00------- 154 -------------- 92.00------- 153 ---------....--- 94.00------- ------- ------- 2 95.00------- 152 -------------- 96.00------- 151 -------------- 101.00------- 148 8------- 106.00------- ------- 7------- 107.00 - ---- 147 -------------- 108.00------- 145 -------------- 111.00------- ------- 6------- 112.00------- 144 -------------- 115.00------- 143 -------------- 117.00------- 142 5 1 1i8.00------- 140 ---- -- 119.00------- 138 ------- 120.00 - 135 ------- 121.00------- 134 4 124.00------- 131 ------- 125.00------- 129 ------- 126.00------- 128 ------- 127.00------- 125 --_---- 128.00------- 124 3 130.00------- 123 ------- 131.00------- 122 ------- 132.00------- 121 ----- - 133.00------- 118 ------- 139.00------- 117 ------- 140.00------- 116 ------- 143.00------- 114 ------- 1.44.00 -- --- 112 2 145.00------- ill ------- 146.00------- 110 ------- 149.00------- 107 ------- 150.00------- 106 ------- 151.00------- 105 ------- 152.00------- 103 ------- 153.00------- 102 ------- 154.00------- loi ------- 156.00------- 99 ------- 158.00------- 98 ------- 159.00------- 97 ------- 160.00------- 96 i 162.00------- 95 164.00------- 92 165.00------- 91 167.00 1 90 2 U) _A C 70 O CZ ) a> pa� U s cc3 � C cz C n C o < o 0 r I T T N tf) O O O CO CQ CO ' � I i I UUU I cua>m I c c c I U) U) V) c0 cts co m m m I 0 O U�� I � I M M � Z (n I I � I I I I I I I I I I I I I I I I I I I I I I I ~' I I � I + I 1 T I I o 0 0 6 o co 0 0 0 d N C7 00 CO N n u L V: i` V^l 4 O ai U �w cis U) c�rz Wt0- LS � o C: o Q O O O T O T LO Y T T T T T (4) a6els (or) N rn oi m rn C'M N L Q) oi LL oi O • • C) a) CM W V ^0^` ^W W LO X W N U C cv r U c o aw N N a ig C>> rn CO u C) T n ■ ao r co cn Cr T T Tftis T T rn m co ai rn CD 0) LL O W 0 rn 0 00 O ce) H U O 0) 0 L O i F- U O O cu U N 0 U X W O T U cu L U c � U L LL f 17 C) u (D O CD C Q) U w w cTJ m U m c cz m S2 _>1 c� <x -U c c .019 �J Y �U N m O � O Z O O ti L T T T T T tl�) a6alS rn � rn Co rn CY) N O � O L.L O O ai 00 of rn m m cs> rn 0 m o O rn Z CD 0 0 w s T O Z O N ci c v U X W O (U) N C cz U o T U i U CL O .1F 0 C6o O O Eel L U ai N CO m a - 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(Z cz a_ n cooc�Cl) (Y) U) cn C) Q) cn -0 -0 -0 -2 0- caasZ U) U) CO r- p- t-- -6 1-- C\j N C\j N LO LO U-) .2 LO — C\J CO + CD 6 b b (D CD C) C) C) CD C) C) (D C) CD C) It co cq CD m 00 (SID) abieqoslc) CY) U— CY) LL O cz 70 x w CD Q) LO 0 m m m CY) m C:> C5 C:5 C5 0 C� C) C) C) C) CD LO It CY) N ei 0 t C) LL C) Z, Lon CY) E CO cz 0) 6) 06 ui cr- rr- cl) W Q) Q CY) U) CO YIN O U) U) Cl) D Cl) C) OF D q 0- Cl CL )L (1) U) w r-- N N CN N LO LO LO O LO - 44- LO q Z, LL CY) m M, m M. C) C; c; O C) C) O O O 6 C5 6 C CD 0 0 C) C> C) C) CD CD C) CD C) C) ,It CV) N CD 0) 00 rl- (D LO d CY) C\j (SIO) ableqOSI(] • • m CD n CD n 0 � n C CD y m X 0 CD CD 0- CD N O 1 Discharge (cfs) W Q p p Q 0 p p p Q I TT 1 mT i C) CD CL \ •I-+ W \ + `'' V CD (D I \ � � p p + x. 00 cn + CD co I I C) Purpose and Need In 1997, the City of Renton completed the Final Plan and Environmental Impact Statement (FEIS) for the proposed East Side Green River Watershed Project (ESGRWP) (R. W. Beck, 1997). The ESGRWP is a multi -benefit, comprehensive public improvement project intended to solve existing flooding problems, prevent future flooding problems, and restore environmental resources in the Renton portion of the East Side Green River Watershed. As part of the FEMA remapping study, R. W. Beck has been retained by the City to update the previous ESGRWP hydrologic and hydraulic models to reflect current land use and current conveyance conditions and to re -assess the proposed 1997 ESGRWP flood control improvements. The 1-405 Team is in the process of evaluating stormwater and environmental impact mitigation measures for the South Renton Project section. Data gathering efforts have identified the R. W. Beck hydraulic models as being the starting point for evaluating mitigation alternatives. Most efficient use of funds and time toward this end is to contract R. W. Beck (CONSULTANT) to support the 1-405 Project Team (STATE). This work will provide hydraulic model support and documentation to evaluate proposed improvements along the 1-405 and SR-167 corridors. Scope Elements Part I. Support the Early Environmental Initiatives (EEI) The EEI effort is in the process of evaluating wetland mitigation sites along Springbrook Creek. One of the sites is located at the SW 27th bridge crossing of Springbrook Creek (also known as Sites 6, 7a and 7b by RW Beck). The second site, referred to as "Site E", is located on the left bank of Springbrook Creek. This 9.9 acre area is bounded by Oakesdale Avenue S. to the west, S. 34th Street to the North, and Springbrook Creek to the east. Assumptions The scope under this work would generally use the existing HSPF models to extract information to support these work elements. The prior HSPF model will be modified to include recent survey data that was done to support the floodplain model work. This work will require a revision to the current HECRAS model sections as required to define new stage/storage/discharge relationships for the effected channel segments. Two flow conditions will be modeled: • Existing land use with existing channel storage modified to include the City's proposed 2006 culvert replacement improvements at SW 23rd Street. • Future land use with full channel improvements as modeled in the floodplain model work. Page 1 of 7 2/10/20052/zT /��5 Work Elements The CONSULTANT shall provide the STATE existing condition hydrologic model output as required to provide the following hydrologic information: A. Flow duration analysis B. Annual and monthly stage duration analyses C. Annual and monthly percent flow exceedance curves D. Durations Analysis on the 3-, 7- and 14-day average flow conditions E. Percent of years that a given elevation is exceeded during growing season where elevations are defined in 0.5 foot increments. F. Lowest flow during the highest period using 14-day averages Deliverables Draft Letter Report (3 copies) Final Letter Report (3 copies) CD containing Letter Report text, tables and figures in Word format Part 11. Support the Nickel Project Downstream Analyses This work will support the downstream analyses as required to assess the potential downstream impacts to the Springbrook Creek tributary systems that will be influenced by the Nickel Project improvements. The roadway improvements propose one new southbound and one new northbound 1-405 lane through the Springbrook Creek basin (MP 1.3 to 3.0) plus one new southbound SR-167 lane from 1-405 to SE 41st Street off - ramp (MP 24.44 — 25.8). Additionally, the Benson Road Bridge over 1-405 and the City street approach from the north will be reconstructed as part of the project. The STATE has evaluated land cover changes with this project and has proposed flow control treatment facilities that will use an equivalent catchment area approach to mitigate flow increases from the highway corridor. The objective of this downstream analysis is to review changes in flow peaks and durations in the receiving City drainage systems, culverts, and channels for a distance of at least 1/4 mile downstream of the project to ensure that these facilities are not impacted. Three Springbrook Creek tributaries will be investigated with this effort: a. The Rolling Hills Creek tributary drainage system that extends east from Springbrook Creek under SW 19th Street and East Valley Road to a culvert under SR167; in a channel and wetland along the east side of SR- 167 to the 1-405 interchange with-SR167; and through two culverts under 1-405 to the Rolling Hills Creek channel, as modeled in the previous R.W. Beck study. Under existing conditions the tributary drains 29.5 acres of Page 2 of 7 2/10/200524,2005 highway pavement. This basin will experience increased runoff from approximately 2.9 acres of new impervious area added in the basin. The STATE has designed flow control using three ponds that are located just upstream of Talbot Road. Each of these connects to the Rolling Hills tributary at different locations. With this equivalent flow control located at the upstream end of the City's drainage system, higher flows would be allowed from a portion of the widened highway without flow control (1-405 between Talbot and SR-167). Additionally, the SR-167 widening is proposed without flow control within this tributary system. b. The SW 23rd Street tributary channel extends east from Springbrook Creek to a fish passable culvert under SR-167 and includes the City drainage system that collects flows from the south along the East Valley Road. This tributary currently drains 19.3 acres of SR-167 highway pavement. Runoff in the basin will be increased by approximately 2.3 acres of new impervious area. The STATE has designed flow control using one pond that is located in a vacant property between the East Valley Road and SR-167 roughly half way between the SW 23rd Street channel and SW 34th Street. This pond would collect runoff from a 2.3 acre portion of SR-167 and provide flow control before discharging to the East Valley Road drainage system. With this equivalent flow control in place, higher flows would be allowed from other parts of SR-167. c. City storm drainage systems extend from Springbrook Creek east along SW 34th Street, under East Valley Road and SR-167 to eventually connect into Panther Creek. The STATE proposes to divert a portion of the SR-167 flow control facility to mitigate any increased impervious area in this basin. In addition to the increase impervious areas along 1-405 and SR-167, the proposed improvements will include bridge widening at the 1-405 crossing of Springbrook Creek. This includes addition of new columns being added to the south, and in line, with the existing columns. The existing culvert will also be extended using the same cross section as in the existing condition. Assumptions: The hydraulic model work is limited to Springbrook Creek and its tributary systems. Assessment of potential changes in flow peaks and durations will rely on the HSPF model only. Change in flow peaks and durations will be evaluated Future Land Use with Future Channel Improvements Condition for the full range of flows from 50 percent of the 2-year recurrent storm through the 50-vear recurrent storm. Assessment of potential changes in floodplain elevation will be based on an FE-Q-HSPF and HECRAS models of the 100-year design storm. Page 3 of 7 2/10/2005 „2005 The STATE will provide the revised hydrology, as -built information, and survey as required to define model input for developemt of the three new tributaries of the Rolling Hills Creek sub basin. Refer to Work Element A for additional detail. The STATE will provide catchment areas, land cover changes, and stage -storage - discharge relationships for the preferred flow control alternative for the proposed 1-405 and SR-167 widening project.. The STATE will subdivide existing subbasins as required to establish new subbasin that will be modified for flow control along the corridor. The landuse/soil type information for these new subbasins will be provided for both existing and proposed conditions. The STATE will schedule, lead and prepare meeting minutes for all meetings. The revised model in Work Element A is subject to City of Renton approval. Letter Reports will include documentation of available data, methods used for the study, summary of findings in the downstream conveyance systems, and other data pertaining to the report conclusions. Work Elements: A. The CONSULTANT shall extend the hydrae HSPF model to further define the SW 19th Street tributary through the full length of the 1-405 project influence. This work will build on the Part I work that modified the prior Existing Conveyance model to include recent Springbrook Creek survey data and 2006 culvert improvements at 34th Street. This effort will include -additional channel and pipe branches to reflect existing conveyance of three tributar-+ebranches from salong the SW 19th Street/Rolling Hills Creek tributary : • The channel and pipe branches for Rolling Hills Tributary will be extended to a location that is on the east side of Talbot Road and south of 1-405 • The channel and pipe for the mine discharge conveyance to the south of 1-405 • The pipe conveyance for Thunder Creek will be extended to the south side of 1-405 Each of these three tributaries will require new hydrograph input locations that replace Subbasin P5 in the existing model. Letter Report will include an evaluation of the differences between the new t=€Q-model results feF the 100- year design storm and those of the prior floodplain modeling for the City. B. The CONSULTANT shall incorporate prior R. W. Beck floodplain project channel surveys and the City's proposed 2006 culvert replacement at SW 34th Street in Springbrook Creek to establish an existing condition HSPF hydraulic model. C. The CONSULTANT shall input the STATE provided modification to subdivide the existing HSPF basins as needed to define the 1-405 and SR-167 highway corridor subbasins bosom on oinn ground Gover Gonditions Page 4 of 7 2/10/2005''%2 05 D. The CONSULTANT shall evaluate the downstream influence of the preferred flow control alternative to address the new impervious areas as proposed for the South Renton Nickel Project. The Letter report will assess the following: a. Change in flow peaks within the City storm drainage systems along the SW 19th Street tributary including the 1-405 interchange culverts and City drainage systems up to Talbot Road'. b. Change in flow peaks within the City storm drainage systems in SW 34th Street and the East Valley Road. c. Change in flow peaks and durations within Springbrook Creek and the SW 23rd Street channel. d. Change in backwater conditions in the SR 167 culvert crossings that potentially influence the hydrologic period in the Panther Creek wetlands. Deliverables One Draft Letter Report describing the work and results for each Work Element (3 copies each) One Final Letter Report describing the work and results for each Work Element (3 copies each) CD containing Letter Report text, tables and figures in Word format Part Ill. Support the Basin Level Flow Control and Stream Restoration Concepts The STATE is exploring redevelopment of the Panther Creek wetland on the east side of SR-167 between 1-405 and Panther Creek. The current vision includes two parts: Closed conveyance of the Mine, Thunder Creek, and Rolling Hills Creek flows in a new system along the 1-405 corridor. This new conveyance will relieve the City's SW 19th Street and Rolling Hills Creek tributary system by diverting the flows to a new stream, wetland, and wetland buffer system that will be located to the east of SR-167 between the 1-405 Corridor and the SW 23rd channel. • Redevelop Panther Creek discharges to the wetland for improved stream, wetland, and wetland buffer systems that will be located to the east of SR-167 roughly between SW 38th Street and the SW 23rd channel. Assumptions The STATE will provide the new channel alignments, profile, and typical section for the new channel and wetland systems to be evaluated in Work Elements A and B. Page 5 of 7 2/10/20052/9�5 Once the initial results are available, the STATE will provide a revised channel and wetland alternative as required to address any downstream impacts that are identified in the hydraulic model of the initial runs. Work Elements: A. The CONSULTANT shall expand the Work Elements A and B from Part 4 modeling to evaluate up to 2 alternatives for a new Thunder Creek and Rolling Hills Creek diversion pipe system to route flows to a proposed new channel and wetland system in the Panther Creek wetland between the 1-405/SR-167 interchange and the SW 23rd Street culvert. The Letter report will assess the following: a. Change in flow peaks within the City storm drainage systems along SW 19th Street. b. Change in flow peaks and durations within Springbrook Creek and the SW 23rd Street channel. c. Change in backwater conditions in the SR 167 culvert crossings that potentially influence the hydrologic period in the Panther Creek wetlands. B. The CONSULTANT shall expand the Work Element A modeling to evaluate up to 2 alternatives for a new Panther Creek channel and wetland system in the Panther Creek wetland between the existing channel in the vicinity of SW 37th Street and the SW 23rd Street culvert. ,T second titter a#ivr ► .IiKelv.tc rear ire 23rd Stroet dratnac channeI for sforage and flt5liv �apat ity.'; This effort will also investigate the need for irovisions to maintain existing hydrologic periods in the City of Renton and State wetland site(s) along Springbrook Creek between SW 27th Street and SW 39th Street. The Letter report will assess the following: d. Change in flow peaks within the City storm drainage systems along SW 34th Street. e. Change in flow peaks and durations within Springbrook Creek and the SW 23rd Street channel. f. Change in backwater conditions in the SR 167 culvert crossings that potentially influence the hydrologic period in the Panther Creek wetlands. Deliverables One Draft Letter Report describing the work and results for each Work Element (3 copies each) One Final Letter Report describing the work and results for each Work Element (3 copies each) CD containing Letter Report text, tables and figures in Word format Page 6 of 7 2/10/2005 9,12005 Part IV. Project Management • Weekly labor and progress reports on Phase II work elements. • Monthly Invoicing • Quality Assurance • Meetings Page 7 of 7 2/10/2005''/°��5 PROJECT REQUEST FORM PLANNING/BUILDING/PUBLIC WORKS SOME SECTIONS APPLY TO CIP AND SOME APPLY TO DEVELOPER PROJECTS DATE: r r r i *' CONTACT:WO# FILE STATUS EXISTING OR NEW_) FILE CODE (PRi-xx-xxxx): LOCATION My Work Space: File Bay Shelf #: Other: PROJECT NAME: r`{� «=rc'+', �t( (label line one) (70 characters max) Allowable Folder Title (CIP ONLY): SEE ATTATCI IED ALLOWABLE FOLDER CHECKLIST pg. 2 (label line two) DESCRIPTION OF PROJECT: S (L — t405 t✓, ,• �' i rk0 ���✓cr+� 3 firs-vi Z+I��, �� h-, T 1 h Sri- r sSz 10 5�, t-t, i2c ,., +r „ ADDRESS/STREET NAME(S): S iZ DEV/CNTR/OWN/CNSLT: w s o c) i OTHER ALIASES: Circle Size of Waterlline: 8" 10" 12" Circle One: New / Replace / Extension Circle Size of Sewerline: 8" 10" 12" Circle One: New / Replace / Extension Circle Size of Stormline: 12" 18" 24" Circle One New / Replace / Extension CHECK EACH DISCIPLINE INVOLVED IN PROJECT Ltr!g of sheets TED (roadway/drainage) (off site improvements) (include TESC) TRO (Signalization, Channelization, Lighting) WWP (wastewater) (sanitary scwcr main) WTR (water) (Mains, Valves, Hydrants) (inc. composite & HorizontalCtrl) (SWP (surface water imp.) �- (CIP onlyxinclude basin name) '>' PLR (plan review) (Neccessary for developer files) _ (letter only) PL' El`E CHECKb �CH NEED TO SIGN WATER WASTEWATER S[J12I;' . TRANSPORAT>f MA, FOR FILE MAINTAINANCE USE ONLY File Codes: Date Entered and Labels Made: (.o— 47 _ 3c� — r RgtformNEWPROJ.doc CIP PROJECT F1LEPICKLIST " UTILITIES FILE TITLE FOLDER SIZE* QUANTITY> CORRESPONDENCE................................................................. General............................................................................. Consultant......................................................................... City.................................................................................... 5 OtherAgencies.................................................................. " 5 Contractor......................................................................... Grants/Loans...................................................................... DESIGN/PLANNING.................................................................... �i S Design............................................................................... Consultant Selection.......................................................... Contracts........................................................................... Reports/Studies/Calculations (Geotech, Surveying, etc).... S Consultant Payments......................................................... AGREEMENTS (Interlocal, Cost Sharing, MOA's, etc) ................ SEPA.......................................................................................... PERMITS/PLAN REVIEW........................................................... EASEMENTS/DEEDS................................................................. CONSTRUCTION....................................................................... Bid Info (Bid Tab, Agenda Bill, Committee Reports).......... Insurance & Legal Review ................................................. Contract Document (inc. Specs, Contract ,& Bid docs)....... Submittals.......................................................................... Materials Shop Drawings Schedules Traffic Control Plan PayEstimates................................................................... Prevailing Wages ChangeOrders................................................................... Inspection/Progress Reports .............................................. Photos, Site Condition Reports Construction Management Services (Consultant) .............. Contract Invoices Operations & Maintainance................................................ General Information Manual As-built/Survey Notes LITIGATION................................................................................ LID.............................................................................................. Public Notification.............................................................. PublicMeetings................................................................. Final Assessment Roll ....................................................... Miscellaneous.................................................................... SAD............................................................................................ Public Notification.............................................................. PublicMeetings................................................................. Final Assessment Roll ....................................................... Miscellaneous.................................................................... *FOLDER SIZE CHOICES: — 1", 2", or 4" side tab for shelf storage (1 S, 2S, or 4S). 1" top & side tab for files kept at desks/file cabinets prior to shelves (1TS). RgtformUTLT.doc