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HomeMy WebLinkAbout1.01 Drainage & Stormwater ManagementDRAINAGE CALCULATIONS and DETENTION DESIGN For proposed FRAC TECH PARACHUTE, COLORADO December 11, 2006 2402-001 Prepared by: ATKINS AND ASSOCIATES, INC. 518 28 Road, Suite B-105 Grand Junction, Colorado 81501 P 970.245.6630 F 970.245.2355 +,3L�1titYTYLYPWj•y�rrP Lf w a a iJ: TABLE OF CONTENTS Design Summary Drainage Area Map Discharge Calculations 2 -Year Storm Event Analysis 25 -Year Storm Event Analysis Design Summary: Frac Tech is proposing to construct a maintenance facility on approximately 13.5 acres located near Parachute. Currently, the site is undeveloped and has 3-6% slopes. As part of the site development, detention ponds were designed to accommodate the 2 -year and 25 -year storm events. Discharge rates from the ponds were limited to existing flow conditions for both events. As depicted on the enclosed Drainage Area Map, current storm water enters one of two existing culverts under State Highway 6. Therefore, two detention ponds were necessary to restrict the discharge to less than existing flow conditions for each culvert. In addition, a substantial amount of flow passes through the site from north of Interstate 70. In an effort to reduce the flows of this storm water, a detention pond was designed north of the site as well. The reduced discharge from this pond travels alongside the site into the southwest detention pond, Methodology The first step of the detention analysis was to determine the allowable pond discharges by calculating the pre -developed flows. The next step was to delineate the areas contributing to each pond and subsequently create each area's hydrograph. These hydrographs were then routed through their respective detention pond using the software package Hydrographs 2004 by Intellisolve. The outflow hydrograph was then analyzed to confirm that existing flows had not been exceeded. All discharge calculations and software output files are included with this report. North Detention Pond The sole purpose of the north detention pond was to reduce the flow of the storm water entering the site from the north. Therefore, the pond outflow hydrograph was not limited to any particular flow. An outlet was chosen that would convey enough flow to not overtop the dam. To be conservative, the 100 -year storm was also modeled to ensure adequate storage was provided. The north detention pond has the following characteristics: • The top elevation of the detention pond is 5059.00 ft. • The bottom elevation of the detention pond is 5053.50 ft. • The flowline elevation of the detention outlet structure is 5053.50 ft. • The outlet structure for the detention pond is a 24 -inch HDPE pipe. • The flowline of the grass -lined emergency spillway is 5058.00 ft. Using these characteristics, the model suggests that the discharges for the 2 - year and 25 -year storm events were 12.0 cfs and 27.1 cfs, respectively. The outflow hydrograph for each storm event was then combined with the respective southwest detention pond inflow hydrograph. Southwest Detention Pond The proposed southwest detention pond has the following characteristics: • The top elevation of the detention pond is 5040.00 ft. • The bottom elevation of the detention pond is 5034.00 ft. • The flowline elevation of the outlet structure is 5034.00 ft. • The outlet structure for the detention pond is an 18 -inch HDPE pipe. • The flowline of the grass -lined emergency spillway is 5039.00 ft. Using these parameters, a detention model was created and yielded the results found in Table 1. Please note that a small portion of the storm water does not flow through the detention pond. Therefore, this by-pass flow is added to the pond discharge to calculate the total flow released. Table 1 Description Storm Event 2 -Year 25 -Year Allowable Release Rate (cfs) 13.9 57.4 Pond Discharge (cfs) 9.8 16.4 By -Pass Flow (cfs) 0.5 1.9 Total Discharge (cfs) 10.3 18.3 Maximum Elevation (ft) 5036.57 5038.96 Southeast Detention Pond The proposed southeast detention pond has the following characteristics: • The top elevation of the detention pond is 5035.00 ft. • The bottom elevation of the detention pond is 5030.50 ft. • The flowline elevation of the outlet structure is 5030.50 ft. • The outlet structure for the detention pond is a 10 -inch HDPE pipe. • The flowline of the grass -lined emergency spillway is 5034.00 ft. Another detention model was created for the southeast detention pond and the results can be found in Table 2. Dote that all flow in this watershed passed through the detention pond, thus eliminating a by-pass flow. Table 2 Deseripliarr Storm Event 2 -Year 25 -Year Allowable Release Rate (cfs) 2.7 11.3 Pond Discharge (cfs) 2.4 3.8 By -Pass Flow (cfs) - - Total Discharge (cfs) 2.4 3.8 Maximum Elevation (ft) 5031.74 5033.57 Conclusions Three detention ponds were modeled to determine the developed discharge rates to existing culverts. The findings of this report suggest that existing flows were not exceeded. Drainage Area Map Discharge Calculations 2 -Year Storm Event Analysis Table 2 Description Allowable Release Rate (cfs) Storni Event 2 -Year 25 -Year Pond Discharge (cfs) By -Pass Flow (cfs) Total Discharge (cfs) 2.7 2.3 11.2 4.0 2.3 4.0 Maximum Elevation (ft) Conclusions I 5031.78 5033.72 Three detention ponds were modeled to determine the developed discharge rates to existing culverts. The findings of this report suggest that existing flows were not exceeded. Description Allowable Release Rate (cfs) Pond Discharge (cfs) B -Pass Flow (cfs) Tota! Discharge (cfs) Storm Event 2 -Year 13.9 25 -Year 57.4 9.7 0.5 16.4 1.7 10.2 Maximum Elevation (ft) Description Allowable Release Rate (cfs) Pond Discharge (cfs) B -Pass Flow cfs) 18.1 5036.54 5038.98 Storm Event 2 -Year 25 -Year 2.7 11.2 2.3 4.0 2.3 4.0 Maximum Elevation (ft) 5031.78 Time (min) 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 2 -Year Intensity (in/hr) 1.11 1.07 1.03 0.99 0.95 0.92 0.89 0.86 0.83 0.81 0.79 0.76 0.74 0.72 0.70 0.68 0.67 0.65 0.64 0.62 0.61 0.59 0.58 0.57 0.56 0.54 0.53 0.52 1DF DATA Modified from Mesa County* 100 -Year Intensity (in/hr) 4.41 4.23 4.07 3.92 3.77 3.64 3.52 3.41 3.30 3.20 3.10 3.02 2.93 2.85 2.78 2.70 2.64 2.57 2.51 2.45 2.40 2.34 2.29 2.24 2.20 2.15 2.11 2.07 Time (min) 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 2 -Yea r Intensity (in/hr) 0.51 0.50 0.49 0.49 0.48 0.47 0.46 0.45 0.45 0.44 0.43 0.42 0.42 0.41 0.40 0.40 0.39 0.39 0.38 0.38 0.37 0.37 0.36 0.36 0.35 0.35 0.34 0.34 100 -Year intensity (in/hr) 2.03 1.99 1.95 1.91 1.88 1.85 1.82 1.78 1.75 1.73 1.70 1.67 1.64 1.62 1.59 1.57 1.55 1.53 1.50 1.48 1.46 1.44 1.42 1.40 1.38 1.37 1.35 1.33 Source: Mesa County 1992 (modified) Adjustments made from NOAA Atlas Precipitation Maps for Parachute, CO to relate rainfall intensities to those from Grand Junction, CO area 2 -Year Multiplier = 1.2 25 -Year Multiplier = 1.0 (factored against GJ area 100 -year rainfall intensity) NOAA 24-HOUR PRECIPITATION FOR Parachute, CO 2 -Year = 1.2 inches 25 -Year = 2.2 inches 1(2) = 1.2 *26.711 (Tc + 19.01) 1(25) = 104.94 / (Tc + 18.80) TN'r F:SI r DURATION' FREQUENCY D;VF, EXHIBIT 6.0 2 -Year Storm Event Analysis s' s Table of Contents Hydraflow Hydrographs by intelia°lve 2 - Year Hydrograph Reports Hydrograph No. 1, Hydrograph No. 2, Pond Report Hydrograph No. 3, Hydrograph No. 4, Hydrograph No. 5, Pond Report Hydrograph No. 6, Hydrograph No. 7, Pond Report TEST2_Site Developed Detention 10-26-06.gpw Thursday, Oct 26 2006, 5:4 PM Rational, 2 -Yr Developed to N 1 Reservoir, 2 -Yr N Pond 2 3 Rational, 2 -Yr Developed to SW 4 Combine, 2 -Yr Combined to SW 54 Reservoir, 2 -Yr SW Pond 6 6 7 Rational, 2 -Yr Developed to SE 8 Reservoir, 2 -Yr SE Pond 9 9 10 Hydrograph Plot Hydraflow Hydrographs by intelisolve Hyd. No. 1 2 -Yr Developed to N Hydrograph type Storm frequency Drainage area Intensity IDF Curve Q (cfs) 115.00 = Rational = 2 yrs = 87.020 ac 1.105 in/hr = ParachuteCalDF Thursday, Oct 26 2006. 5:4 PM Peak discharge Time interval Runoff coeff. Tc by User Asc/Rec limb fact = 14.81 cfs 1 min 0.2 10.00 min = 1/1.67 2 -Yr Developed to N Hyd. No. 1 -- 2 Yr Hydrograph Volume = 11,862 cuft Hyd No. 1 Q (cfs) 15.00 12.00 9.00 6.00 3.00 0.00 0.5 Time (hrs) 1 Hydrograph Piot Hydraflow Hydrographs by Intelisolve Hyd. No. 2 2 -Yr N Pond Hydrograph type = Reservoir Storm frequency = 2 yrs inflow hyd. No. = 1 Reservoir name = N Pond Storage Indication method used. Q (cfs) 15.00 12.00 9.00 6.00 3.00 0,00 Thursday, Oct 26 2006, 5:4 PM Peak discharge = 12.26 cfs Time interval = 1 min Max. Elevation = 5055.16 ft Max. Storage = 1,745 cuft 2 -Yr N Pond Hyd. No. 2-2Yr Hydrograph Volume = 11,550 cuft 0.0 0.1 Hyd No. 2 0.2 0.3 Hyd No. 1 0.3 0.4 Q (cfs) 15.00 12.00 9.00 6.00 3.00 0.00 0.5 0.6 0.7 Time (hrs) Pond Report Hydraflow Hydrographs by Intefisotve Pond No. 3 - N Pond Pond Data Pond storage is based on known contour areas. Average end area method used. Stage / Storage Table Stage (ft) 0.00 1,50 2.50 3.50 4.50 5.50 Elevation (ft) 5053.50 5055.00 5056.00 5057.00 5058.00 5059.00 Contour area (soft) Incr. Storage (cuft) Total storage (cuft) 00 1,640 4,680 6,960 9,620 12,815 Culvert / Orifice Structures [A] [B] [C] [D] Rise (In) Span (in) No. Barrels Invert El. (ft) Length (ft) Slope (%) N -Value Orif. Coeff. Multi -Stage = 24.00 = 24.00 =1 = 5053.50 = 55.00 = 4.50 =.011 = 0.60 nla 0.00 0.00 0.00 0.00 0.00 0.00 0 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 .000 .000 .000 0.00 0.00 0.00 No No No 0 1.230 3,160 5,820 8,290 11,218 0 1,230 4,390 10,210 18,500 29,718 Weir Structures Crest Len (ft) Crest Ei. (ft) Weir Coeff, Weir Type Multi -Stage Thursday, Oct 26 2006, 5:4 PM [A] [B] [C] [01 = 0.00 = 0.00 = 0.00 = No 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 No No No Exfiltration = 0.000 in/hr (Contour) Tailwater Elev. = 0.00 ft Stage (ft) 6.00 5.00 - 4.00 3.00 2.00 1.00 0.00 0.00 3.00 Total 0 Stage 1 Discharge Note. CulvertJOrifice outflows have been analyzed under inlet and outlet oontrol. 9.00 9.00 12.00 15.00 18.00 21.00 24.00 Stage (ft) 6.00 5.00 4.00 3.00 2.00 1.00 f. 0.00 27.00 30.00 33.00 Discharge (cfs) Hydrograph Prot Hydraflow Hydrographs by Intelisolve Hyd. No. 3 2 -Yr Developed to SW Hydrograph type Storm frequency Drainage area intensity IDF Curve Q = Rational = 2 yrs 13.620 ac = 1.001 in/hr = ParachuteCO.IDF (cfs) 8.00 6.00 4.00 2.00 0.00 - 2 -Yr Developed to SW Hyd. No. 3 -- 2 Yr Thursday, Oct 26 2006, 5:4 PM Peak discharge = 7.50 cfs Time interval = 1 min Runoff coeff. = 0.55 Tc by User = 13.00 min Asc/Rec limb fact = 1/1.67 Hydrograph Volume = 7,810 cuft 0.0 0.1 Hyd No. 3 0.2 0.3 0.3 0.4 0.5 Q (cfs) 8.00 6.00 4.00 2,00 0.00 0.6 Time (hrs) Hydrograph Piot Hydraflow Hydrographs by Intelisolve Hyd. No. 4 2 -Yr Combined to SW Hydrograph type = Combine Storm frequency = 2 yrs Inflow hyds. = 2, 3 Q (cfs) 21.00 18.00 15.00 12.00 9.00 6.00 - 3.00 0.00 Thursday, Oct 26 2006, 5:4 PM Peak discharge Time interval 2 -Yr Combined to SW Hyd. No. 4 -- 2 Yr 19.76 cfs = 1 min Hydrograph Volume o 10200 cuft 0.0 0.1 Hyd No. 4 0.2 0.3 0.3 Hyd No. 2 Hyd No. 3 0.4 0.5 Q (cfs) 21.00 18.00 15.00 12.00 9.00 6.00 3.00 0.00 0.6 Time (hrs) 5 Hydrograph Prot Hydrafiow Hydrographs by Intelisolve Hyd. No. 5 2 -Yr SW Pond Hydrograph type = Reservoir Storm frequency = 2 yrs Inflow hyd. No. = 4 Reservoir name = SW Pond Storage Indication method used. 2 -Yr SW Pond Hyd. No. 5 - 2 Yr Thursday, Oct 26 2006, 5:4 PM Peak discharge = 9.67 cfs Time interval = 1 min Max. Elevation = 5036.54 ft Max. Storage = 9,503 cuft Hydrograph Volume = 19,193 cuft 0.0 0.2 0.3 0.5 Hyd No. 5 Hyd No. 4 0.7 0.8 1.0 1.2 1.3 1.5 Time (hrs) 6 Pond Report Hydraflow Hydrographs by lntelisolve Pond No. 1 - SW Pond Pond Data Pond storage is based on known contour areas. Average end area method used. Stage / Storage Table Stage (ft) Elevation (ft) Contour area (sqft) Incr. Storage (cuft) Total storage (cuft) 0.00 5034,50 00 0.25 5034.75 2,000 0.50 5035.00 3,650 1.50 5036.00 4,840 2.50 5037.00 11,005 3.50 5038.00 17,075 4.50 5039.00 24,075 5.50 5040.00 32,500 Culvert / Orifice Structures [Al [B] [C] [D] [A] Rise (in) = 18.00 0-00 0.00 0.00 Crest Len (ft) = 0.00 0.00 0.00 0.00 Span (in) = 18.00 0.00 0.00 0.00 Crest El. (ft) = 0.00 0.00 0.00 0.00 No. Barrels = 1 0 0 0 Weir Coeff. = 3.33 0.00 0.00 0.00 Invert El. (ft) = 5034.50 0.00 0.00 0.00 Weir Type _ Length (ft) = 45.00 0.00 0.00 0.00 Multi -Stage = No No No No Slope (%) = 1.00 0.00 0.00 0.00 N -Value _ .011 .013 .000 .000 Orif. Coeff. = 0.60 0.60 0.00 0.00 Multi -Stage = nfa No No No Exfiltration = 0.000 infhr (Contour) Taliwater Elev. = 0.00 ft 0 250 706 4,245 7,923 14,040 20,575 28,288 Weir Structures 0 250 956 5,201 13,124 27,164 47,739 76,026 Thursday, Oct 26 2006, 5.4 PM [B] [C] [D] Stage (ft) 6.00 5.00 4.00 3.00 2,00 1.00 0.00 0 00 r Note; Culvert/Orifice outflows have been analyzed under infat and outlet control. Stage 1 Discharge 2.00 -- - Total 0 4.00 6.00 8.00 10.00 12.00 14.00 16.00 18.00 Stage (ft) 6.00 5.00 4.00 3.00 - 1 2.00 1.00 0.00 20.00 Discharge (cfs) 7 Hydrograph Plot Hydraflow I iydrographs by Intelisolve Hyd. No. 6 2 -Yr Developed to SE Hydrograph type Storm frequency Drainage area intensity IDF Curve = Rational = 2 yrs = 15.740 ac = 1.008 in/hr ParachuteC0.1DF Thursday, Oct 26 2006, 5:4 PM Peak discharge Time interval Runoff coeff. Tc by User Asc/Rec limb fact = 5.72 cfs = 1 min 0.34 = 11.00 min = 1/1.67 Hydrograph Voiurne = 5,036 cult Q (cfs) 6.00 5.00 4.00 3.00 2.00 1,00 0.00 2 -Yr Developed to SE Hyd. No. 6 -- 2 Yr 0.0 0.1 Hyd No. 6 0.2 0.3 0.3 0.4 Q (cfs) 6.00 5.00 4.00 3.00 2.00 11,00 0.00 0.5 Time (hrs) 8 Hydrograph Piot Hydraflow Hydrographs by Intel solve Hyd. No. 7 2 -Yr SE Pond Hydrograph type = Reservoir Storm frequency = 2 yrs Inflow hyd. No. = 6 Reservoir name = SE Pond Storage Indication method used. 0.0 0.2 0.3 Hyd No. 7 2 -Yr SE Pond Hyd. No. 7 -- 2 Yr Thursday, Oct 26 2006, 5.4 PM Peak discharge = 2.29 cfs Time interval = 1 min Max. Elevation = 5031.78 ft Max. Storage = 2,564 cuft Hydrograph Volume = 4,969 cuft 0.5 Hyd No. 6 0.7 0.8 1.0 1.2 1.3 Q (cfs) 6.00 5.00 4.00 3.00 2.00 1.00 0.00 1.5 Time (hrs) Pond Report Hydrafiow Hydrographs by Intefisolve Pond No. 2 - SE Pond Pond Data Pond storage is based on known contour areas. Average end area method used. Stage/Storage Table Stage (ft) 0.00 0.50 1.00 1.50 2.50 3.50 4.50 Elevation (ft) Contour area (sgft) Incr. Storage (cult) Total storage (cuft) 5030.50 00 0 0 5031.00 1,500 375 375 5031.50 3,000 1,125 1,500 5032.00 4,530 1,883 3,383 5033.00 6,320 5.425 8,808 5034.00 8,290 7,305 16,113 5035.00 10,150 9,220 25,333 Thursday, Oct 26 2006, 5:4 PM Culvert ! Orifice Structures Weir Structures [A] [B] [C] [D] [A] [B] [C] [D] Rise (in) = 10.00 0.00 0.00 0.00 Crest Len (ft) = 0.00 0.00 0.00 0.00 Span (in) = 10.00 0.00 0.00 0.00 Crest El. (ft) = 0.00 0.00 0.00 0.00 No. Barrels = 1 0 0 0 Weir Coeff. = 3.33 0.00 0.00 0.00 Invert El. (ft) = 5030.50 0.00 0.00 0.00 Weir Type _ _ Length (ft) = 105.00 0.00 0.00 0.00 Multi -Stage = No No No No Slope (%) = 1.00 0.00 0.00 0.00 N -Value = .011 .013 .000 .000 Orif. Coeff. = 0.60 0.60 0.00 0.00 Multi -Stage = nla No No No Exfiltration = 0.000 in/hr (Contour) Tailwater Elev. = 0.00 ft Stage (ft) Stage / Discharge 5.00 4.00 3.00 2.00 1.00 - 0.00 0.00 Note: Culvert/Orifice outflows have been analyzed under inlet and cutlet control. 0.50 1.00 Total 0 Stage (Ft) 5.00 4.00 3.00 2 00 1.00 1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00 0.00 Discharge (cfs) 10 25 -Year Storm Event Analysis Table of Contents Hydraflow Hydrographs by Intelisolve 25 - Year Hydrograph Reports Hydrograph No. 11, Hydrograph No. 12, Pond Report Hydrograph No. 13, Hydrograph No. 14, Hydrograph No. 15, Pond Report Hydrograph No. 16, Hydrograph No. 17, Pond Report TEST2_Site Developed Detention 10-26-06.gpw Thursday, Oct 26 2006. 5:5 PM 1 Rational, 25 -Yr Developed to N 1 Reservoir, 25 -Yr N Pond 2 3 Rational, 25 -Yr Developed to SW 4 Combine, 25 -Yr Combined to SW 5 Reservoir, 25 -Yr SW Pond 6 7 Rational, 25 -Yr Developed to SE 8 Reservoir, 25 -Yr SE Pond 9 10 Hydrograph Piot Hydraflow Hydrographs by Intelisolve Hyd. No. 11 25 -Yr Developed to N Hydrograph type Storm frequency Drainage area Intensity IDF Curve = Rational = 25 yrs = 67.020 ac 3.644 in/hr ti ParachuteCO.IDF Q (cfs) 70.00 60.00 50.00 40.00 30.00 20.00 10.00 25 -Yr Developed to N Hyd. No. 11 --25 Yr Thursday, Oct 26 2006, 5:4 PM Peak discharge = 61.05 cfs Time interval = 1 min Runoff coeff. = 0.25 Tc by User = 10.00 min Asc/Rec limb fact = 1/1.67 Hydrograph Volume = 48,902 cuft Q (cfs) 70.00 0.0 0.1 Hyd No. 11 0.4 0.00 0.5 Time (firs) 1 Hydrograph Piot Hydraflow Hydrographs by Intefisolve Hyd. No. 12 25 -Yr N Pond Hydrograph type Storm frequency Inflow hyd. No. Reservoir name = Reservoir = 25 yrs = 11 = N Pond Storage Indication method used. Thursday, Oct 26 2006, 5:4 PM Peak discharge Time interval Max. Elevation Max. Storage = 28.61 cfs = 1 min = 5058.08 ft = 19,386 cuft 25 -Yr N Pond Hyd. No. 12 -- 25 Yr Hydrograph Volume = 47,619 cuft 0.0 0.1 Hyd No. 12 0.2 0.3 0.3 Hyd No. 11 0.4 0.5 0.6 0.7 0.8 O (cfs) 70.00 60.00 50.00 40.00 30.00 20.00 10.00 0.00 0.8 Time (hrs) 2 Pond Report Hydrafiow Hydrographs by Intelisolve Pond No. 3 - N Pond Pond Data Pond storage is based on known contou Stage / Storage Table Stage (ft) 0.00 1.50 2.50 3.50 4.50 5.50 Elevation (ft) 5053.50 5055.00 5056.00 5057.00 5058.00 5059.00 yeas. Average end area method used. Contour area (sqft) incr. Storage (cuft) Total storage (cuft) 00 1,640 4,680 6,960 9,620 12,815 Culvert / Orifice Structures [A] [s] [C] [D] Rise (in) Span (In) No. Barrels Invert El. (ft) Length (ft) Slope (%) N -Value Orif. Coeff. Multi -Stage 24.00 = 24.00 =1 = 5053.50 = 55.00 4.50 = .011 = 0.60 = nla 0 1,230 3,160 5,820 8,290 11,218 0 1,230 4,390 10,210 18,500 29,718 Thursday, Oct 26 2006, 5:4 PM 0.00 0.00 0.00 0.00 0.00 0.00 0 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 .000 .000 .000 0.00 0.00 0.00 No No No Weir Structures Crest Len (ft) Crest El. (ft) Weir Coeff. Weir Type Multistage [A] [B] [C] [D] = 0.00 = 0.00 = 0.00 = 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 No No No Exfiltration = 0.000 inlhr (Contour) Tailwater Elev. = 0.00 ft Stage (ft) 6.00 5.00 4.00 3.00 2.00 1.00 0.00 0.00 Note: CulvertfOrdfce outflows have been analyzed under hist and outlet Control', Stage 1 Discharge 3.00 Total Q 6.00 9,00 Stage ((t) 6.00 5.00 4.00 3.00 200 1.00 12.00 15.00 18.00 21 00 24.00 27.00 30 00 33.000.00 Discharge (cfs) Hydrograph Piot Hydraflow Hydrographs by Intelisolve Hyd. No. 13 25 -Yr Developed to SW Hydrograph type Storm frequency Drainage area Intensity IDF Curve Q (cfs) 28.00 24.00 20.00 16.00 12.00 8.00 4.00 - 0.00 — 0.0 Rational = 25 yrs = 13.620 ac 3.300 in/hr = ParachutecO.IDF 25 -Yr Developed to SW Hyd. No. 13 -- 25 Yr Thursday, Oct 26 2006, 5:4 PM Peak discharge Time interval Runoff coeff. Tc by User Asc/Rec limb fact = 26.07 cfs = 1 min 0.58 = 13.00 min = 1/1.67 Hydrograph Volume = 27,145 cuft 0.1 Hyd No. 13 0.2 0.3 0.3 0.4 0.5 Q (cfs) 28.00 24.00 20.00 16.00 12.00 8.00 4.00 ' 0.00 0.6 Time (hrs) Hydrograph Piot Hydraflow Hydrographs by Intelisolve Hyd. No. 14 25 -Yr Combined to SW Hydrograph type = Combine Storm frequency = 25 yrs Inflow hyds. = 12, 13 Q (cfs) 60.00 50.00 40.00 30.00 20.00 Thursday, Oct 26 2006, 5.4 PM Peak discharge Time interval = 53.01 cfs = 1 min Hydrograph Volume = 74,209 tuft 25 -Yr Combined to SW Hyd. No. 14 -- 25 Yr 0.0 0.1 Hyd No. 14 0.2 0.3 Hyd No. 12 Hyd No. 13 0.6 0.7 Q (cfs) 60.00 50.00 40.00 30.00 20.00 10.00 0.00 0.8 Time (hrs) 5 Hydrograph Piot Hydrattow Hydrographs by Intelisolve Hyd. No, 15 25 -Yr SW Pond Hydrograph type = Reservoir Storm frequency = 25 yrs Inflow hyd. No. = 14 Reservoir name = SW Pond Storage Indication method used. Q (cfs) 60.00 50.00 40.00 30.00 20.00 10.00 Thursday, Oct 26 2006, 5.4 PM Peak discharge Time interval Max. Elevation Max. Storage = 16.42 cfs 1 min = 5038.98 ft 47,240 tuft 25 -Yr SW Pond Hyd. Na. 15 - 25 Yr Hydrograph Volume = 74,202 cuft 0.0 0.2 0.3 0.5 0.7 Hyd No. 15 0.8 1.0 Hyd No. 14 1.2 1.3 1.5 Q (cfs) 60.00 50.00 40.00 30.00 20.00 10.00 0.00 1.7 1.8 2.0 2.2 2.3 Time (hrs) 6 Pond Report Hydraflow Hydrographs by Intelisoive Pond No. 1 - SW Pond Pond Data Pond storage is based on known contour areas. Average end area method used. Stage 1 Storage Table Stage (ft) Elevation (ft) 0.00 0.25 0.50 1.50 2.50 3.50 4.50 5.50 5034.50 5034.75 5035.00 5036.00 5037.00 5038,00 5039.00 5040.00 Contour area (sqft) Incr. Storage (cuft) Total storage (cuft) 00 2,000 3,650 4,840 11,005 17,075 24,075 32,500 0 250 706 4,245 7,923 14,040 20,575 28,288 0 250 956 5,201 13,124 27,164 47,739 76,026 Thursday, Oct 26 2006, 5:4 PM Culvert / Orifice Structures Rise (in) Span (in) No. Barrels invert El. (ft) Length (ft) Slope (%) N -Value Orif. Coeff. Multi -Stage [A] [B] [C] [D] • 18.00 • 18.00 = 5034.50 = 45.00 1.00 = .011 = 0.60 ▪ nla 0.00 0.00 0 0.00 0.00 0.00 .013 0.60 No 0.00 0.00 0 0.00 0.00 0.00 .000 0.00 No 0.00 0.00 0 0.00 0.00 0.00 .000 0.00 No Weir Structures Crest Len (ft) Crest El. (ft) Weir Coeff. Weir Type Multi -Stage [A] [B] [C] [0] = 0.00 0.00 3.33 No 0.00 0.00 0.00 No 0.00 0.00 0.00 No 0.00 0.00 0.00 No Exfiltratlon = 0.000 infhr (Contour) Tallwater Elev. = 0.00 ft Stage / Discharge Nate: Culvert/Orifice ouU lows have been analyzed under inlet and curial control. 0.00 2.00 Total 0 4.00 6.00 8.00 10 00 12.00 1400 16 00 18 00 Stage (ft) 6.00 5.00 4.00 3.00 2.00 1.00 0.00 20 00 Discharge (cfs) 7 Hydrograph Plot Hydraflow Hydrographs by Intelisolve Hyd. No. 16 25 -Yr Developed to SE Hydrograph type Storm frequency Drainage area Intensity IDF Curve = Rational = 25 yrs = 15.740 ac 3.521 in/hr = ParachuteCalDF Thursday, Oct 26 2006, 5:4 PM Peak discharge = 21.62 cfs Time interval = 1 min Runoff coeff. = 0.39 Tc by User=11.00min Asc/Rec limb fact = 1/1.67 25 -Yr Developed to SE Hyd. No. 16 — 25 Yr Hydrograph Volume = 19,047 cuft 0.0 0.1 Hyd No. 16 0.3 0.3 0.4 Q (cfs) 24.00 20.00 16.00 12.00 8.00 4.00 0.00 0.5 Time (hrs) 8 Hydrograph Plot Hydra{low Hydrographs by Iritelisolve Hyd, No. 17 25 -Yr SE Pond Hydrograph type = Reservoir Storm frequency = 25 yrs Inflow hyd. No. = 16 Reservoir name = SE Pond Storage Indication method used. 25 -Yr SE Pond Hyd. No, 17 25 Yr Thursday, Oct 25 2006, 5:4 PM Peak discharge = 3.99 cfs Time interval = 1 min Max. Elevation = 5033.72 ft Max. Storage = 14,046 cuft Hydrograph Volume = 18,603 cult 0.0 0.2 0.3 0.5 0.7 Hyd No. 17 0.8 1.0 Hyd No. 16 1.2 1.3 1.5 1.7 1.8 2.0 2.2 2.3 Time (hrs) 9 Pond Report Hydraflow Hydrographs by lntellsolve Pond No. 2 - SE Pond Pond Data Pond storage is based on known contour areas. Average end area method used. Stage / Storage Table Stage (ft) Elevation (ft) 0,00 0.50 1.00 1.50 2.50 3.50 4.50 5030.50 5031.00 5031.50 5032.00 5033.00 5034.00 5035.00 Contour area (sqft) 00 1,500 3,000 4,530 6,320 8,290 10,150 Incr. Storage (cuft) Total storage (cuft) 0 375 1,125 1,883 5,425 7,305 9,220 Culvert / Orifice Structures [Al [B] [C] [DJ Rise (In) Span (In) No. Barrels Invert El. (ft) L ength (ft) S lope (%) N -Value Orif. Coeff. Multi -Stage Stage (ft) 5.00 4.00 3.00 2.00 1.00 = 10.00 = 10.00 =1 5030.50 105.00 =1.00 = .011 = 0.60 = nla 0.00 - 0.00 0.50 Total Q 1.00 0.00 0.00 0.00 0,00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 .013 .000 0.60 0.00 No No 0.00 0'00 0 0.00 0.00 0.00 .000 0.00 No Weir Structures Crest Len (ft) Crest El. (ft) Weir Coeff. Weir Type Multi -Stage 0 375 1,500 3,383 8,808 16,113 25,333 Thursday, Oct 26 2006, 5:4 PM [Al [B] [D] [D] 0.00 = 0.00 = 3.33 = No 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 No No No Exfiltration = 0.000 inthr (Contour) Tailwater Elev. = 0.00 ft Note- CulverUQrirce outflows haVe bean analyzed underinlet and outlet control. Stage 1 Discharge 1.50 2.00 2.50 3.00 3.50 4.00 4.50 Stage (ft) 5.00 4.00 3.00 2.00 1,00 0.00 5.00 Discharge (efs) MSDS Sheets 1+ FRAC TECH SERVICES 268 SCARROW RD./FRONTAGE RD. PARACHUTE, C'O. 81635 PACE 111F3 MATERIAL SAFETY DATA SHEET 1. PRODUCT NAME : KCLS-2, KCL SUBSTITUTE DOT PROPER SHIPPING NAME: COMBUSTIBLE LIQUID N.O,S, NA1993,PGIII,(GLYCOL ETHER EB) DOT HAZARD CLASSIFICATION:COMBUSTIBLE LIQUIDS MATERIALS GLYCOL ETHER EB % WIW HAZARD DATA (TI.V. ETC.) 3-8% 1 25 ppm TELEPHONE NUMBER:I-800-349-9355 EMERGENCY NUMBER:1-800-535-5053 II. PHYSICAL DATA/ PRODUCT CHARACTERISTICS BOILING POINT: 212degF SPECIFIC GRAVITY: 1.124 PH: 3.5-5.5 MELTING POINT: SOLUBILITY IN WATER: COMPLETE COLOR: DARK BROWN ODOR: MILD ORGANIC III. FIRE & EXPLOSION INFORMATION FLASH POINT: 198 DEG F EXTINGUISHING MEDIA:CO2,DRY CHEMICAL, FOAM, WATER FOG OR SPRAY UNUSUAL FIRE OR EXPLOSION HAZARDS: NONE DETERMINED IV. REACTIVITY INFORMATION STABILITY:STABLE HAZARDOUS DECOMPOSITION PRODUCTS: ELEMENTAL OXIDES INCOMPATIBILITY: STRONG ACIDS: STRONG ALKALIS: X STRONG OXIDIZERS: X OTIIER: CONDITIONS TO AVOID: HEAT: OPEN FLAME: SPARKS: IGNITION SOURCES: OTHER: ., V. HEALTH HAZARD INFORMATION MCI: 2 IIF 3 PRIMARY ROUTES OF ENTRY FOR INJURY CAUSING; EXPOSURE: SYMPTOMS OF EXPOSURE: EYES: SEVERE IRRITATION SKIN: MAY CAUSE IRRITATION AND POSSIBLE DERMATITIS INGESTION: MAY CAUSE IRRITATION INHALATION: MAY CAUSE NOSE, THROAT AND RESPIRATORY IRRITATION CARCINOGENICITY: NONE LISTED MEDICAL CONDITIONS AGGRAVATED BY EXPOSURE: VI. FIRST AID RECOMMENDATIONS EYES: FLUSH EYES WITH WATER OF AT LEAST 15 MINUTES, HOLDING EYELIDS APART. CALL PHYSICIAN SKIN: WASH AFFECTED AREA WITH SOAP AND WATER, WASH AFFECTED CLOTHING BEFORE REUSE. INGESTION : SEEK MESDICAL ATTENTION INHALATION: REMOVE VICTIM TO FRESH AIR, IF SYMPTOMS PERSIST CALL PHYSICIAN. VII. PERSONAL PROTECTIVE INFORMATION VENTILATION REQUIREMENTS: GENERAL ARE EXHAUST: LOCAL EXHAUST: NO EXHAUST NECESSARY: PERSONAL PROTECTIVE EQUIPMENT: EVE PROTECTION: GOGGLES OR FACE SHIELD SKIN PROTECTION: RUBBER GLOVES, BOOTS, AND SPLASH APRON RESPIRATORY PROTECTION: DUST OR VAPOR MASK OTHER REQUIRED EQUIPMENT: VIII. SPILL PROCEDURES & WASTE TREATMENT SPILL PROCEDURES: ABSORB SPILL AND CONTAINERIZE FOR DISPOSAL WASTE TREATMENT: DISPOSE OF ACCORDING TO FEDERAL STATE, AND LOCAL I.A4%'S. PAGE 3 OF 3 IX. TOXIC SUBSTANCE CONTROL ACT INFORMATION I'.f' �''..1•: 11 !.I ''ll'()N1 \ Is 01"I ITIS PROM (1 AM' IIF(;Nu EKED 1 .N1}I:I( 111E RI (:I 1.11 11 /Ns (1E 111I. 10\11.S1 1141.1\1 1. (1)S1 1((N. A("1 :AS 14E01 IRF:II. S.ti1.R.A.: (1IEMICAI. COMPONENTS SIIBJF:(`I TO 'DIE REPORTING RE(KIRF:.►IEN'IS OF SECTION 313 O1 TITLE 111 OF TIIE SI'PERFUND AMENDMENTS AND REM IT1I0RIZATION ACT OF 1986 AND 3 0 CFR PART 372 ARE AS FOLLOWS: CHEMICAL, NAME GLYCOL ETHER EB 3-8% % BY WEIGHT CAS REG. # 111-76-2 CONDITIONS: THE ABOVE INFORMATION IS ACCURATE TO THE BEST OF OUR KNOWLEDGE. HOWEVER, SINCE DATA, SAFETY STANDARDS, AND GOVERNMENT REGULATIONS ARE SUBJECT TO CHANGE AND THE CONDITIONS OF HANDLING AND USE, OR MISUSE ARE BEYOND OUR CONTROL, WE MAKE NO WARRANTY, EITHER EXPRESS OR IMPLIED, WI'T'H RESPECT TO THE COMPLETENESS OR CONTINUING ACCURACY OF THE INFORMATION CONTAINED IIEREIN AND DISCLAIM ALL LIABILITY FOR RELIANCE THEREON. USER SHOULD SATISFY HIMSELF THAT HE HAS ALL CURRENT DATA RELEVANT TO HIS PARTICULAR USE. PREPARED: DATE:07/25/06 BY: D. HARVELL HMIS RATING: HEALTH -2, FLAMMABILITY -I, REACTIVITY -O J FRAC TECH SERVICES 268 SCARROW RD./FRONTAGE RD. PARACHUTE, CO. 81635 1':'ICE 1111-3 MATERIAL SAFETY DATA SI-IEET 1. PRODUCT NAME : FRW-25 FORMULA: Polymeric Mixture CHEMICAL FAMILY: Polymeric Mixture I)OT HAZARD CLASSIFICATION:D.O.T. NON-REGULATED MATERIALS % WI XY ANIONIC COPOLYMER N11NERAI..01L >35 >25% HAZARD DATA 1 111,1, E rc .1 TELEPHONE NUMBER1-800-349-9355 EMERGENCY NUMBER: 800-535-5053 II. PHYSICAL DATA/ PRODUCT CHARACTERISTICS BOILING POINT: Not Determined SPECIFIC GRAVITY: .96--.99A, 77 deg. F FREEZING POINT: Not Determined SOLUBILITY IN WATER: Miscible PHYSICAL STATE: Liquid ODOR: Aromatic III. FIRE & EXPLOSION INFORMATION FLASH POINT: > 200 DEG. F EXTINGUISHING MEDIA: Foam or Dry Chemical UNUSUAL FIRE OR EXPLOSION HAZARDS: NONE KNOWN IV. REACTIVITY INFORMATION STABILITY: STABLE HAZARDOUS DECOMPOSITION PRODUCTS: Cox, NOx, SOx INCOMPATIBILITY: Oxidizing Agents, concentrated Sulfuric or Nitric Acid CONDITIONS TO AVOID:Flames, Sparks, heat above flash point V. HEALTH HAZARD INFORMATION PAGE 2 OF 3 PRIMARY ROUTES OF ENTRY FOR INJURY CAUSING EXPOSURE: EYES: IRRITATION SKIN:POSSIBLE IRRITATION INHALATION: IRRITATION CARCINOGENICITY: UNKNOWN MEDICAL CONDITIONS AGGRAVATED BY EXPOSURE: UNKNOWN VI. FIRST AID RECOMMENDATIONS EYES: FLUSH EYES WITH WATER OF AT LEAST 15 MINUTES, HOLDING EYELIDS APART. CALL PHYSICIAN SKIN: WASH AFFECTED AREA WITH SOAP AND WATERINGESTION: DO NOT INHALATION: REMOVE VICTIM TO FRESH AIR, IF SYMPTOMS PERSIST CALL PHYSICIAN. VII. PERSONAL PROTECTIVE INFORMATION VENTILATION REQUIREMENTS: GENERAL ARE EXHAUST: X LOCAL EXHAUST: X PERSONAL PROTECTIVE EQUIPMENT: EYE PROTECTION: GOGGLES OR FACE SHIELD SKIN PROTECTION: RUBBER GLOVES, BOOTS, AND SPLASH APRON RESPIRATORY PROTECTION: VAPOR MAST{ OTHER REQUIRED EQUIPMENT: VIII. SPILL PROCEDURES & WASTE TREATMENT SPILL PROCEDURES: ABSORB SPILL AND CONTAINERIZE FOR DISPOSAL. WASTE TREATM ENT: DISPOSE OF ACCORDING TO FEDERAL, STATE, AND LO(`11, I.AN% S. PAGE 3OF3 IX. SUBSTANCE CONTROL ACT INFORMATION CONDITIONS: -THE ,U3oy":INI(1R11:A'fIoN Iti:A('C('RATE T() THE RES!' OF ()('R kNOWLEDC;E. IIOW EVER, SINCE DATA, SAFETY STANDARDS. AND GOVERNMENT REG I'I.ATIONs :ARF: SI:B.IF:CT'C0 CHANGE ,AND TIIF: CONDITIONS OF HANDLING ANI) USE, OR MIS(SE ARE RF:Y0\I) ()1 R CONTROL, AVE: MAKE No WARRANTY, EITHER EXPRESS OR IMP1.II:D, WITH RESPECT TO THF. COM P1.E I'F:NE:SS OR CONTINUING ACCURACY OF THE 1\'I ORA1A 110N CoN PAINED HEREIN AND DISCLAIM ALL LIABILITY FOR RELIANCE THEREON. USER S1I01.I.1) SATISFY II1%ISEI.0 TIIAT FIE IIAS ALL ('URRF:NT DATA RELEVANT'To HIS PARTICULAR USE. PREPARED: DATE:08/29106 RY: D. FIARVELL HMIS RATING HEALTH: 1 FLAMMABILITY: I REACTIVITY: 0 CHEMICAL PRODUCT Product Identifier Chemical Name Chemical Family Manufacturer Emergency Phone Prepared by Phone Issue Date Revised Date CESI CHEMICAL Fiotek company MATERIAL SAFETY DATA SHEET AND COMPANY IDENTIFICATION MA -844W Not applicable, a blend Surfactants and Solvent Mixture CESI Chemical (a Flotek Industries, Inc. company) 1004 S. Plainsman Road, Marlow, OK 73055 1-800-256-4703 Todd Sanner (580)-658-6608 04/03/02 11/20/02 2. COMPOSITION/INFORMATION Ingredient CAS No. Wt. Percent Range OSHA PEL ACGIH TI_V LD50 LC50 Ingredient CAS No. Wt. Percent Range OSHA PEL ACGIH TLV LD50 LC50 Ingredient CAS No. Wt. Percent Range OSHA PEL ACGIH TLV LD50 LC50 Ingredient CAS No. Wt. Percent Range OSHA PEL ACGIH TLV LD50 LC50 3. HAZARDS IDENTIFICATION Human health hazards Acute health hazards Chronic health hazards Route(s) of entry Safety hazards Environmental hazards ON INGREDIENTS Isopropanol 67-63-0 10-20 400 ppm TWA 400 ppm TWA Peroral 6.48 ml/kg (rat) Percutaneous 8.0 ml/kg (rabbit) Fathead Minnow 8,300 mg/i (96 h) Daphnia 7,550 mg/I (48 h) : Cyclohexenes Proprietary Proprietary Not established Not established : Dermal >5g/kg (rabbit) Oral >5g/kg (rat) No data available Alcohols Proprietary Proprietary Not established Not established No data available No data available Alkyl Alkoxylate Proprietary Proprietary Not established Not established No data available No data available Eye, skin and inhalation irritant. Harmful if swallowed. Defatting or dermatitis of the skin. Eyes, skin, inhalation, ingestion Flammable liquid Toxic to aquatic organisms 4. FIRST AID MEASURES Eye Skin Inhalation Ingestion 5. FIRE FIGHTING MEASURES Flash Point Lower Explosion Limit Upper Explosion limit Extinguishing Media Protective equipment Hazardous combustion products Carbon monoxide may be evolved if incomplete combustion occurs 6. ACCIDENTAL RELEASE MEASURES Wear hand, eye, protective clothing and respiratory protective equipment to eliminate contact. Eliminate ignition sources. Evacuate all non-essential personnel. Soak up residue with an inert absorbent and place into appropriate containers for disposal or reclamation. Flush contaminated area thoroughly with water. Retain washings as contaminated waste. If possible stop the flow of chemical. Dike to contain and prevent spreading. Remove with vacuum truck or pump to salvage vessels. Treat residue as for small spills. Remove contact lenses at once. Immediately flush with copious amounts of water for at least 15 minutes while holding eyelids open. If irritation persists, seek medical attention. Wash affected area thoroughly with soap and water. Remove contaminated clothing and launder before reuse. If irritation develops, seek medical attention Remove to fresh air. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Seek prompt medical attention. If victim is conscious. give one or two glasses of water. DO NOT induce vomiting if vomiting occurs spontaneously, keep the victim's head below the hips to prevent aspiration into the lungs. Never give anything by mouth to an unconscious person. Seek immediate medical attention. 77°F (25°C) (Closed Cup) 0.7% (Cyclohexenes) 6.1% (Cyclohexenes) carbon dioxide, foam or dry chemical NIOSH/MSHA approved self-contained breathing apparatus (SCBA) and turnout gear. Personal precautions General precautions Small spills Large spills 7. HANDLING AND STORAGE Handling Storage Avoid contact with eyes, skin and clothing. Avoid breathing vapors. Use with adequate ventilation. Do not take internally. Wear appropriate protective clothing and equipment during handling. Wash thoroughly after handling. Remove contaminated clothing and launder before reuse. Store away from heat, sparks and open flames. Keep container closed when not in use. Store drums with the bung up. Carefully vent container before removing bung. 8. EXPOSURE CONTROLS/PERSONAL PROTECTION Occupational exposure standards • Not established for the product. Hand protection : Nitrite rubber gloves. Eye protection Chemical splash goggles and face shield if conditions warrant. Respiratory protection : Not normally required. Engineering control measures Other General (mechanical) room ventilation is expected to be satisfactory. Emergency eye wash fountains and safety showers should be in the immediate vicinity of any potential exposure. 9. PHYSICAL AND CHEMCIAL Form Appearance Color Odor Specific Gravity Bulk Density Boiling Point Freezing Point Solubility in water pH Percent Volatiles Vapor Pressure PROPERTIES Liquid Clear to opaque Colorless to milky white Citrus 0.9391 7.837 Ibslgal 310°F(154.4°CS) < -42° F (< -41.1° C) 69-79% Not determined 55-75% weight Not determined 10. STABILITY AND REACTIVITY Stability Conditions to avoid Hazardous polymerization Hazardous decomposition products Incompatibility Stable Heat, sparks, open flames Will not occur None Strong oxidizing agents 11. TOXICOLOGICAL INFORMATION Acute Effects Eye Causes moderate to severe irritation. If not removed promptly, permanent injury may result. Skin : May cause mild to moderate irritation with brief contact. Prolonged contact may cause severe irritation, drying, defatting and dermatitis. Contains a potential skin sensitizer (Cyclohexenes). Inhalation : May cause nose, throat and general upper respiratory tract irritation, coughing and headache. Ingestion : Product is harmful if swallowed. May cause vomiting, headache, nausea, diarrhea, abdominal cramps, drowsiness and dizziness. Chronic Effects No other known chronic effects. Carcinogenicity None of the ingredients are listed in NTP, IARC monographs or OSHA regulated. 12. ECOLOGICAL INFORMATION Environmental Fate : No information is available on the product however it is expected to be toxic to aquatic organisms. 13. DISPOSAL CONSIDERATIONS Waste disposal Recycle if possible. Otherwise dispose to licensed disposal contractor. Product disposal Recycle if possible. Otherwise comply with all local, state and federal regulations. Container disposal : Dram container thoroughly, Triple rinse with water. Send to reclaimer or dispose of properly. Comply with all local, state and federal regulations. 14. TRANSPORT INFORMATION United States D.O. T. DOT Shipping Name Label(s) required Hazard Class UN/NA number Packaging group Emergency Phone Flammable liquids, N.O.S. (contains Isopropanol, CAS#67-63-0 and Cyclohexenes, CAS# 5989-27-5), 3, UN1993, PGIII Flammable liquid 3 UN1993 PG lif (405) 282-8510 15. REGULATORY INFORMATION OSHA Classification TSCA (USA) DSL (Canada) SARA Title ill Section 302 Sections 311/312 Immediate (acute) health hazard Delayed (chronic) health hazard Fire hazard Sudden Release of Pressure Hazard Reactive Hazard Section 313 Reportable Quantities CERCLA Reportable Quantity 16. OTHER INFORMATION NFPA 704 Health Fire Reactivity Special HMIS Health Fire Reactivity Special Disclaimer of Liability This document has been prepared in accordance with the MSDS requirements of the OSHA Hazard Communication Standard 29 CFR 1910.1200. Hazardous All components listed. All components listed. Exirernely '!`lazardous Substances (40CFR355) This product dugs not contain ingredients listed in Appendix A and 8. YES YES YES NO NO None If the reportable quantity of this product is accidentally spilled, the incident is subject to the provisions of the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) and must be reported to the National Response Center by calling (800) 424-8802. Not determined for the product. 2 3 0 None 2 3 0 None The information contained in this MSDS was obtained from sources that we believe are reliable. However, the information is without any warranty, express or implied, regarding correctness. The methods of handling, storage, use and disposal of the product are beyond our control and may be outside the scope of our knowledge. For these reasons, we do not assume responsibility and expressly disclaim Liability for loss, damage or expense arising out of or in any way connected with the handling, storage, use or disposal of the product. .1 FRAC TECH SERVICES 268 SCARROW RD./FRONTAGE RD. PARACHUTE, CO. 81635 P.e(;1'. 1 (l: 3 MATERIAL SAFETY DATA SHEET 1 PRODUCT NAME : FTS -OS -2, OXYGEN SCAVENGER DOT PROPER SHIPPING NAME: FLAMMABLE LIQUIDS N.O.S.,3,UN1993,PGII{ALCOHOL} DOT HAZARD CLASSIFICATION: FLAMMABLE LIQUID MATERIALS ISOPROPYL ALCOHOL %W/W 10% _ HAZARD DATA ('T LV'. 11'c.) SODIUM THIOSULFATE > 10% LEL: 2.0 UEL: I2.7(a?77 DEG F TELEPHONE NUMBER:1-800-349-9355 EMERGENCY NUMBER:1-800-535-5053 TLV: 10mg/n3 II. PHYSICAL DATA/ PRODUCT CHARACTERISTICS BOILING POINT: 212 DEG F SPECIFIC GRAVITY:1.10 x 8.34(water) PH: 7.0 MELTING POINT:N/D SOLUBILITY IN WATER: COMPLETE COLOR: CLEAR ODOR: SLIGHT ALCOHOL III. FIRE & EXPLOSION INFORMATION FLASH POINT: 74 DEG F . EXTINGUISHING MEDIA: USE WATER SPRAY TO COOL FIRE EXPOSED SURFACES AND TO PROTECT PERSONNEL. SHUT OFF FUEL TO FIRE. IF A LEAK OR SPILL HAS NOT IGNITED, USE WATER SPRAY TO DISPERSE THE VAPORS. EITHER ALLOW FIRE TO BURN UNDER CONTROLLED CONDITIONS OR EXTINGUISH WITH ALCOHOL TYPE FOAM AND DRY CHEMICAL. TRY TO COVER LIQUID SPILLS WITH FOAM. UNUSUAL FIRE OR EXPLOSION HAZARDS: AT OR ABOVE FLASH POINT. IV. REACTIVITY INFORMATION STABILITY: STABLE HAZARDOUS DECOMPOSITION PRODUCTS: CO, CO2, OXIDES OF SULFUR INCOMPATIBILITY: STRONG ACIDS: X STRONG ALKALIS: X STRONG OXIDIZERS: X OTIIER: CONDITIONS TO AVOID: III. 11: X OPEN 11 ME: sr..%KkS: IGNITION NOI RtTS: \ 01 III•:k: V. HEALTH HAZARD INFORMATION PAGE 2OF.3 PRIMARY ROUTES OF ENTRY FOR INJURY CAUSING EXPOSURE: SYMPTOMS OF EXPOSURE: EYES: IRRITATING, WILL INJUE THE EYE TISSUE IF NOT REMOVED PROMPTLY. SKIN: IRRITATING, MAY CAUSE DERMATITIS. LOW ORDER OF TOXICITY. INGESTION: MAY CAUSE IRRITATION, VOMITTING. SMALL AMOUNTS OF LIQUID ASPIRATED INTO THE RESPIRATORY SYSTEM DURING INGESTION, OR FROM VOMITING, MAY CAUSE BRONCHIOPNEUMONIA OR PULMONARY EDEMA. INHALATION: IRRITATION, MAY CAUSE HEADACHES, AND DIZZINESS. CARCINOGENICITY: NONE KNOWN MEDICAL CONDITIONS AGGRAVATED BY EXPOSURE: DERMATITIS. VI, FIRST AID RECOMMENDATIONS EYES: FLUSH EYES WITH WATER OF AT LEAST 15 MINUTES, HOLDING EYELIDS APART. CALL PHYSICIAN SKIN: WASH AFFECTED AREA WITH SOAP AND WATER, WASH AFFECTED CLOTHING BEFORE REUSE. INGESTION: DO NOT INDUCE VOMITING, KEEP AT REST AND GET MEDICAL ATTENTION. INHALATION: REMOVE VICTIM TO FRESH AIR, IF SYMPTOMS PERSIST CALL PHYSICIAN. VII. PERSONAL PROTECTIVE INFORMATION VENTILATION REQUIREMENTS: GENERAL ARE EXHAUST: LOCAL EXHAUST: X NO EXHAUST NECESSARY: PERSONAL PROTECTIVE EQUIPMENT: EVE PROTECTION: GOGGLES OR FACE SHIELD SKIN PROTECTION: RUBBER GLOVES, ROOTS, AND SPLASH APRON RESPIRATORY PROTECTION: DUST OR VAPOR MASK OTHER REQUIRED EQUIPMENT: VIII. SPILL, PROCEDURES & WASTE TREATMENT SPILL PROCEDURES: AIL.ti()RR SPII.I. AtiI) coNTAI\L:Itt%.F: I OR DisPosm. WASTE TREATMENT: DISPOSE; OF A(( Itl)I\G 10 FEDERAL. ST 1 FF: ►NI) LO('.►t. l.:►► PAGE 3OF3 IX, TOXIC SUBSTANCE CONTROL ACT INFORMATION T.C.S.A.; :+11.1. COMPONENTS OF THIS PRODUCT ARE REGISTERED UNDER'1'11E REGULATIONS OF THE TOXIC- SUBSTANCE CONTROL ACT AS RE:QLUIRED. S.A.R.A.: CIIEIjjICAL, COMPONENTS SUBJECT TO THE REPORTING REQUIREMENTS OF SECTION 313 OF TITLE 111 OF THE SUPERFUND AMENDMENTS AND REAUTHORIZATION ACT OF 1986 AND 40 CFR PART 372 ARE AS FOLLOWS: CHEMICAL NAME % BY WEIGHT CAS RFC_ CONDITIONS: TME ABOVE INFORMATION IS ACCURATE TO THE BEST OF OUR KNOWLEDGE. HOWEVER, SINCE DATA, SAFETY STANDARDS, AND GOVERNMENT REGULATIONS ARE SUBJECT TO CHANGE AND TFIE CONDITIONS OF HANDLING AND USE, OR MISUSE ARE BEYOND OUR CONTROL, WE MAKE NO WARRANTY, EITHER EXPRESS OR IMPLIED, WITH RESPECT TO THE COMPLETENESS OR CONTINUING ACCURACY OF THE INFORMATION CONTAINED HEREIN AND DISCLAIM ALL LIABILITY FOR RELIANCE THEREON. USER SHOULD SATISFY HIMSELF THAT HE HAS ALL CURRENT DATA RELEVANT TO HIS PARTICULAR USE. PREPARED: DATE: 09/27/06 BY: D. HARVELL HMIS RATING: HEA TII- 2, FLAMMABILITY -3, REACTIVITY -1 I. FRAC TECH SERVICES 268 SCARROW RD./FRONTAGE RD. PARACHUTE, CO. 81635 I'1[;!: 1111 3 MATERIAL SAFETY DATA SHEET PRODUCT NAME : CS -250 SI DOT PROPER SHIPPING NAME: D.O.T. NON-REGULATED, Polyaerylate Solution DOT HAZARD CLASSIFICATION: Not Regulated MATERIALS % WJW HAZARD DATA [ I I.v. E I•c-.} TELEPHONE NUMBER: 800-349-9355 EMERGENCY NUMBER: 800-535-5053 II. PHYSICAL DATA/ PRODUCT CHARACTERISTICS BOILING POINT: 300 Deg F SPECIFIC GRAVITY: 1.02-1.05 MELTING POINT: ND SOLUBILITY IN WATER: SOLUBLE COLOR: YELLOW TO AMBER ODOR: MILD III. FIRE & EXPLOSION INFORMATION FLASH POINT: > 205 DEG F EXTINGUISHING MEDIA: DRY CHEMICAL, CO2, FOAM UNUSUAL FIRE OR EXPLOSION HAZARDS: None Known IV. REACTIVITY INFORMATION STABILITY: Stable HAZARDOUS DECOMPOSITION PRODUCTS: Carbon Monoxide, Carbon Dioxide INCOMPATABILITY: STRONG ACIDS: X STRONG ALKALIS:X STRONG OXIDIZERS:X OTHER: CONDITIONS TO AVOID: HEAT:X OPEN FLAME: SPARKS: IGNITION SOURCES: OTHER: V. HEALTH HAZARD INFORMATION P.u.r. 2 OF 3 PRIMARY ROUTES OF ENTRY FOR INJURY CAUSING EXPOSURE: EYES: No human or animal health data exists SKIN: No human or animal health data exists INGESTION: No human or animal health data exists INHALATION: No human or• animal health data exists CARCINOGENICITY: No human or animal health data exists MEDICAL CONDITIONS AGGRAVATED BY EXPOSURE: None Known VI. FIRST AID RECOMMENDATIONS EYES: FLUSH EYES WITH WATER OF AT LEAST 15 MINUTES, HOLDING EYELIDS APART. CALL PHYSICIAN SKIN: WASH AFFECTED AREA WITH SOAP AND WATER, WASH AFFECTED CLOTHING BEFORE REUSE. INGESTION: DO NOT INDUCE VOMITING INHALATION: REMOVE VICTIM TO FRESH AIR, IF SYMPTOMS PERSIST CALL PHYSICIAN. VIL PERSONAL PROTECTIVE INFORMATION VENTILATION REQUIREMENTS: GENERAL ARE EXHAUST: X LOCAL EXHAUST: X PERSONAL PROTECTIVE EQUIPMENT: EYE PROTECTION: GOGGLES OR FACE SHIELD SKIN PROTECTION: RUBBER GLOVES, BOOTS, AND SPLASH APRON RESPIRATORY PROTECTION: DUST OR VAPOR MASK OTHER REQUIRED EQUIPMENT: VIII. SPILL PROCEDURES & WASTE TREATMENT SPILL PROCEDURES: ABSORB SPILL AND CONTAINERIZE FOR DISPOSAL WASTE TREATMENT: DISPOSE OF ACCORDING TO FEDERAL, STATE, AND LOCAL LAWS. PAGE 3 OF 3 IX. TOXIC SUBSTANCE CONTROL, ACT INFORMATION 11 1 [ 011l'O\1.\ IS OF 17115 PROM ( 1 ARI: ]tl-.(:IS I I.kIM I \U1.11 1111. Rua LA i I(1\S O1 1111. ()\1(' SI DS 1.1\( is ( ON I ROI. A( "'I AS REQUIRLD. t0 1PoNEN 1'S SI'BJE('T• 70 THE REPOR'UN(. REQ1:IREIIENTS OF SE("1'ION 313 OF TITLE 111 OF THE SI;PERFIJNI) AI4IF:ND:\1F:N'I'S AND RE:%U ITIORI1,A•f 1 N MT OF 1986 AND -10 (TR PART 372 ARF: AS FOlI.OWS: CHEMICAL NAME BY WEIGHT CAC RPf_ Ethylene Glycol <15 107-21-1 CONDITI©NS: THE ABOVE INFORMATION IS ACCURATE; TO THE BEST OF OUR KNOWLEDGE. HOWEVER, SINCE DATA, SAFETY STANDARDS, AND GOVERNMENT REGULATIONS ARE SUBJECT TO CHANGE AND THE CONDITIONS OF HANDLING AND USE, OR MISUSE ARE BEYOND OUR CONTROL, WE MAKE NO WARRANTY, EITHER EXPRESS OR IMPLIED, WITH RESPECT TO THE COMPLETENESS OR CONTINUING ACCURACY OF THE INFORMATION CONTAINED HEREIN AND DISCLAIM ALL LIABILITY FOR RELIANCE THEREON. USER SHOULD SATISFY HIMSELF THAT HE HAS ALL CURRENT DATA RELEVANT TO HIS PARTICULAR USE. PREPARED: MW REVISED: DH DATE: 08/24/96 HMIS RATING: HEALTH -1, FLAMMABILTY-1, REACTIVITY -0 1 r 1 1 1 1 1 1 r 1 1 1 1 1 1 1 Colorado Department of Public Health and Environment rmternt (CDPlll?) A STORMWATER MANAGEMENT PLAN FOR: FRAC TECH GARFIELD COUNTY, COLORADO December, 2006 PREPARED FOR: FRAC TECH SERVICES, LLC. 16858 INTERSTATE 20 CISCO, TEXAS 76437 PERMIT APPLICATION FORM LOCATION MAP PART 1 DESCRIPTION OF ACTIVITIES 1.1 LOCATION 1.2 EXISTING LAND USE 1.3 PROPOSED LAND USE 1.4 SOILS 1.5 DRAINAGE 1.6 CONSTRUCTION ACTIVITIES 1.7 POTENTIAL POLLUTION SOURCES 1.8 NON-STORMWATER DISCHARGES PART 2 SITE MAP SITE PLAN TRACKING PAD DETAIL EROSION CONTROL LOG DETAIL AREA INLET BARRIER DETAIL OUTLET PROTECTION DETAIL EROSION CONTROL BLANKET DETAIL SEED CHART AND NOTES PART 3 BMP's for STORMWATER POLLUTION 3.1 - EARTHMOVING/GRADING OPERATIONS 3.2 - MATERIAL DELIVERY AND STORAGE 3.3 - SPILL PREVENTION AND CONTROL 3.4 - SOLID WASTE MANAGEMENT 3.5 - VEHICLES/EQUIPMENT MAINTENANCE 3.6 - ASPHALT PAVING OPERATIONS 3.7 - PAINTING AND ROOFING ACTIVITIES 3.8 - LANDSCAPE OPERATIONS 3.9 - CONCRETE WASTE MANAGEMENT 3.10 - SANITARY WASTE MANAGEMENT 3.11 - NON-STORMWATER DISCHARGES PART 4 FINAL STABILIZATION & MANAGEMENT PART 5 INSPECTION AND MAINTENANCE PART 6 CERTIFICATION PERMIT A TKINS AND ASSOCIATES. INC. 518 28 Road, Sui'e 8-105 Gram .IJnewr. CO 81501 970-245-653c 1 1 1 1 1 1 1 1 1 1 1 1 1 1 PERMIT APPLICATION FORM IIGENERAL PERMIT APPLICATION INOTORMWATER DISCHARGES SSOCIATED WITH: 1 CONSTRUCTION AC TTY (Permit No_ Coit -030000) 1 1 1 1 1 For Agency Use Only CUR -03 Year Date Received Month Day Code: 9A 9B 9C(1) 9D(2) 9E(3) 9F(4) Please print or type. All items must be completed accurately and in their entirety or the application will he deemed incomplete and processing of the permit will not begin until all information is received. Please refer to the instructions for information about the required items. An original signature of the applicant is required. 1. Name and address of the permit applicant: Company Name FRAC TECH SERVICES, LLC.. Mailing Address 16858 Interstate 20 City, State and Zip Code Cisco, TX 76437 Phone Number ( 817) 850-1008 Who is applying? Owner Developer Pe Contractor Federal Taxpayer (or Employer) ID#: r 1 1 1 Entity Type: Private fix) Federal Local Contact (familiar with facility) Title District Manager 1 State 1l John Roney County City x 1 Other: 2. Location of the construction site: Street Address US Highway 6 and 24 13 1 1 1 1 Phone Number270) 985-2216 City, State and Zip Code County Garfield Latitude and Longitude Parachute, CO 81635 Name of plan or development 39°24' 31" N. 108'06' 07" VV. FRAC TECH Briefly describe the nature of the construction activity: Oil and Gas Service Facility. 1 4. Anticipated construction schedule (SEE INSTRUCTIONS!): r 1 1 Commencement date: July, 2006 Completion date: December, 2006 5. Area of the construction site: Total area of project site (acres) 77.6 Area of project site to undergo disturbance (acres) 15.1 If project site is part of a Larger Common Plan of Development or Sale. total area of common plan to undergo disturbance (see Instructions) N.A. 6. The name of the receiving stream(s). (If discharge is to a ditch or storm sewer, also include the name of the ultimate receiving water): Two - unnamed drainage channels to Colorado River 7. Stormwater Management Plan Certification: r 1 1 1 1 1 1 "I certify under penalty of law that a complete Stormwater Management Plan. as described in Appendix A of this application. has been prepared for my facility. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the Stormwater Management Pian is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for falsely certifying the completion of said SWMP, including the possibility of fine and imprisonment for knowing violations." Signature of Applicant John Roney Date Signed District Manager Name (printed) Title S. Signature of Applicant (legally responsible person) "I certify under penalty of law that 1 have personally examined and am familiar with the information submitted in this application and all attachments and that, based on my inquiry of those individuals immediately responsible for obtaining the information, I believe that the information is true, accurate and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine or imprisonment" Signature of Applicant ,Jahn Roney Date Signed DIs1ric1 Name (printed) Title Ili021cnnsl 1 -7- 1 1 1 1 1 1 r11111 1 14) 1 A PART 1 DESCRIPTION OF ACTIVITIES 1.1 LOCATION - The site consists of 77.6 acres, of which 13.5 acres will be developed. The property is located approximately four miles southwest of Parachute in Garfield County, Colorado, between Interstate 70 and US Highway 6 and 24. County Road 300 intersects the highway approximately one half mile southwest of the subject site. The site is also located in part of Section 27, Township 7 South, Range 96 West of the 6th Principal Meridian. The approximate latitude and longitude at the center of the property is: 39° 24' 31", 108° 06' 07" 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 4T .SEE MAP 2409-284 113 OPERTY BOUNDAR Y 77.6 acres 1 G 0 (002 PROPOSED DEVELOPMENT AREA 4 75.7 acres - G 107 131 T 1.2 EXISTING LAND USE — That part of the total parcel that is proposed for development is site under irregular in shape; 1,770 feet in length east/west, and 575 feet at it widest north/south point. The primary present land use is: grazing land. Ground cover ranges between non-existent to natural grasses, forbs, and shrubs. The topography of the site is, rolling and generally slopes towards the US Highway 6 and 24 in two directions at a rate of less than four percent. A vertical distance of 25 feet exists between the highest point, adjacent to the north property boundary, and the lowest point on the developed area. The mean elevation of the property is: 5,045 feet above sea level. 1 1 1 1 1 1 1 1 r 1 1 1 1 1 1 4 1 1 1.3 PROPOSED LAND USE — The proposal calls for the ultimate development of a new oil and gas service facility on 15,1 acres of the total parcel. Major activities that will occur on the property include: 1. 8,960 square foot office building. 2_ 16,000 square foot shop building. 3. 11,250 square foot warehouse building. 4. Above ground fuel tank storage area, 5. Acid storage dock. 6. Diesel and gel tank storage. 7. Propane and water storage area 8. Sand silo storage area. 9. Employee parking areas. 10. Outdoor truck and equipment storage and parking areas. A Site Plan Map that depicts the relationship of each building to the property boundary, driveways and parking areas can be found in Part 2 of this plan. 1.4 SOILS - The 1)5 Department of Agriculture, Soil Conservation Service, has identified a single soil classification within the site. A summary of the soil classification is presented in the following Generalized Soils Table. GENERALIZED SOILS TABLE J co 2 V) DESCRIPTION DRAINAGE C PERMEABILITY SHRINK/SWELL POTENTIAL MIN, WATER TABLE DEPT RUNOFF CLASS ANNUAL PRECIPITATION AV Arvada loam, _ 1-4% Slopes Well Mod. Slow Low > 6 fL Mod Non 10" 12" 1.5 DRAINAGE — According to the Flood Insurance Rate Maps the property is located in zone `X", outside of any 100 year flood plains. The site is affected by two off-site drainage basins that originate north of Interstate 70. Existing stormwater generated on the site "sheet" flows in two directions towards a westerly drainage draw that traverses the site and an easterly channel adjacent to the disturbed areas easterly boundary. Each channel flows under the highway and railroad to the Colorado River approximately 1,000 feet away. The location of the off-site drainage features are illustrated on an air photo map that can be found on the following page, Future stormwater flows will be managed by the construction of three new detention ponds. One pond will be constructed adjacent to the north boundary of the site. This basin is intended to reduce the flow rate that enters the property from the west basin that will be redefined to flow around the west boundary of the property to a second detention pond located at the sites southwest property corner. The controlled discharges from this pond will flow towards an existing culvert below US Highway 6 and 24. The location of the existing east channel along the easterly property boundary will be redefined and directed to flow towards a new detention pond near the southeast property corner. The controlled discharge from this pond will flow to the east in a roadside swale adjacent to the highway and ultimately to the Colorado River. All of the future stormwater flows on the property 11 1 1 1 1 1 :4 11 1 1 1 1 1 will be directed to the two detention ponds adjacent to the highway on the ground surface and a series of storm sewer pipelines. A detailed Drainage Report that evaluates a comparison between historic runoff and the developed conditions has been prepared by Atkins and Associates, Inc. and has been transmitted to the owner under separate cover. The pre -development runoff coefficient is: 0.26, compared to a coefficient of 0.46 for the post development condition. 1 1 1 1 1 1 r 1 1 1 1 1 1 loo 1 1 1.6 CONSTRUCTION ACTIVITIES —Major construction activities will occur on the site in a single phase, the sequence of the various major construction activities follow: 1. Clear and grub the developed portions of the property. 2. Rough site grading and applicable swales and erosion control features. 3. Utility infrastructure including storm sewer and appurtenances. 4. Building erection. (May occur at the same time as with No. 3 above.) 5. Curb, gutters and sidewalks. 6. Place gravel base material in driveway and parking areas. 7. Driveway and parking area sub -grade preparation. 8. Surface driveway and parking areas with hot mixed asphalt. 9. Landscaping. 1.7 POTENTIAL POLLUTION SOURCE - Based on the above list of constructions activities, the following are considered to be potential sources of pollution to stormwater: 1 Silts and Sediments ✓ Petroleum Products • Fertilizers 1 Detergents 1 Solvents ✓ Paint 1 Building Material Waste 1 General Solid Waste (trash) 1 Human Waste ✓ Water Used For Saw Cutting Concrete ✓ Water From Concrete Exposed Aggregate ✓ Cleared Vegetation 1.8 NON-STORMWATER DISCHARG ES — The following non-stormwater discharges could occur from the site: 1 Water Used For Saw Cutting Concrete and Asphalt Pavement ✓ Water Used For Exposed Aggregate On Concrete 1 Concrete Truck Wash Out Water ✓ Water Used For Equipment Washing 1 Water Used For Paint and Stucco Cleanup 1 Fire Protection Water +� Water Main Flushing and Testing 1 w 1 1 1 1 1 1 1 r 1 1 1 1 1 1 14, 1 1 PART 2 SITE PLAN MAPS SITE PLAN TRACKING PAD DETAIL EROSION CONTROL LOG DETAIL AREA INLET BARRIER DETAIL OUTLET PROTECTION DETAIL EROSION CONTROL BLANKET DETAIL SEED CHART AND NOTES 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ATKN5 AND ASSCCJATES, INC 5 le 2ePoae, Sub El.. 106 Jurchei. comp, p 245 0a30 F 57.0245 23.55 7 1 1 1 1 1 1 1 1 1 1 1 1 1 rio i 1 Ulm A VEHICLE TRACKING PAD DETAIL 75 ft. Intim) ■ FILTER FABRIC SIDE VIEW EXISTING GROUND 2 in. to 3.5 in. ROCK 2 in. to 3.5 in. CRUSHED ROCK PLAN VIEW 24 ft. 10 Mir TKINS AND ASSOCIATES INC FILTER FABRIC SECTION A- A NOTES WHEN TO INSTALL: Construction Start Date REMOVAL During Street Base Placement STORMWATER MANAGEMENT PLAN - BMP FRAC TECH GARFIELD COUNTY, COLORADO SH EEr OF 7 SI -IF -rc J 1 1 1 1 1 1 1 1 1 1 1 1 4 1 EROSION CONTROL LOG ATKINS AND ASSOCIATES, INC Use Two Wood 1 Yin. x 1 % in. Stakes Embed Min. 4 in, into The Soil (Typ. At Ends or Joints TOP VIEW Alternate Stake At 24 in. Throughout The Length of the Erosion Log EROSION LOG SIDE VIEW VVHEN TO INSTALL: REMOVAL: NOTES Construction Start Date Atter 75% Establishment o andsca.in. STORMWATER MANAGEMENT PLAN - BMP FRAC TECH GARFIELD COUNTY. COLORADO SHEET 3 6F 7 SHEETS 1 1 1 1 1 1 1 1 1 1 1 1 4 1 AREA INLET ROCK BARRIER DETAIL Drop inlet With Grate Concrete Blocks Screened ? in. Rock 111110* bat low IP f 1W4 104 PAIN JO i in, Wire Screen Around Concrete Blocks Sediment Laden Runoff Water TOP VIEW Concrete Blocks Stacked Two High Sediment Laden Runoff Water Treated Runoff Water NOTES WHEN TO dNSTALL: After Inlet Installation REMOVAL: After 75% Revegetation Growth STORMWATER MANAGEMENT PLAN - BMP FRAC TECH 1 ATKINS AND ASSOCIATES, INC GARFIELD COUNTY, COLORADO SHEET 4 OF 7 SHEETS Secure 34 in, Opening Steel Wire To Posts Metal Post Drive min. 12 in. Ground Max. 4 ft. ohs. GROUND LINE OUTLET PROTECTION Sediment Laden Flows PIPE PLAN VIEW Secure 34 in. Opening Steel Wire To Posts Gap Equal To Pipe Diameter 1 in. to 3 in. Screened Rock Metal Post Drive nxn. 12 in. Ground Max. 4 It ctrs. 1inch to3inch Screened Rock AT INS AND ASSOCIATES, INC SIDE_ VIEW Sediment Laden Flows STORMWATER MANAGEMENT PLAN - BMP FRAC TECH GARFIELD COUNTY, COLORADO 9-+ E, 5 of 7 SHEETS EROSION CONTROL BLANKET Bury Upslope End of Blanket In 6 in. by 6 ln. Trench Blanket Fabric Anchored In Trench 0 Use 6 in. Overlap Whenever One Roll of Blanket Ends and Another Begins fsq'ss. ATKINS AND ASSOCIATES, INC. 1 1 1 1 1 1 1 1 1 1 1 1 lio 1 1 ()Use 4 in. Overlap When Two WFdths of Blanket Are Utilized Side by Side. Staple Pattern: Min. 3 per SY Provide Check Slots at 98 inches. Insert a Fold of the Blanket Into a 6 in. by 6 in. Trench end Tamp Firm. Lay Blanket Smoothly On Solt Surface. Do Not Stretch Blanket, or Allow Wrinkles. Staple at 20 ctrs. Over Trench Anchor Blanket in Trench Approx. 6 in. x 6 in Trench "Greenfix WS052 Erosion Control Blanket, or Approved Equal. Place Blanket Parallel To the Direction of Surface Flaw and Anchor per Mfg. Recommendations. STORMWATER MANAGEMENT PLAN - BMP FRAC TECH GARFIELD COUNTY, COLORADO SHEET OF 7 SHEETS SEEDING Hydro -seed at a rate of 15 bulk pounds per acre. Sheep Fescue PERMANENT 1.5 # PLS/Ac. SEED CHART Pubescent Wheatgrass 1.0 # PLS/Ac. Crested Wheatgrass 1.5 # PLS/Ac. Orchardgrass, Paiute 1.5 # PLS/Ac. Thickspice Wheatgrass 2.0 # PLS/Ac. Winter Wheat 1.0 # PLS/Ac. Slender Wheatgrass 2.0 # PLS/Ac. ATKINS AND ASSOCWTES, INC SOIL PREPARATION Material CHART Rate/Ac. "Siosol" Fertilizer 1,000 lbs. Fiber Mulch 2,000 Ibs. Tackifier 200 Ibs. Straw Mulch (approx.) 100 bales NOTES WHEN TO INSTALL: Fall After Final Grading REMOVAL: Do Not Remove STORMWATER MANAGEMENT PLAN - BMP FRAC TECH GARFIELD COUNTY, COLORADO ELT 7 OF 7 SHEETS 1 PART 3 BMP's FOR STORMWATER POLLUTION The BMP's (Best Management Practices) that will be used to assist will the controls of stormwater pollution are presented on the following pages: 1 1 1 1 11$ 1 1 1 1 1 1 1 1 1 p 1 1 1 1 e, 1 1 1 1 1 1 1 SILTS AND SEDIMENTS \m >-1 -4p \ \ C % \ 3.1 - EARTHMOVING/GRADING OPERATIONS (Includes Underground Utilities) CONTROL BMP SHOWN ON PLAN IMPLEMENTATION ✓ INDICATES BMR TO BE USED 1 = YES DATE Temporary Seeding Erosion Control Blankets Surface Roughening Weed Free Straw Bales Silt Fencing Inlet Protection Outlet Protection Channel Lining Sediment Trap Sediment Basin/Detention Pond Dewatering Structure Erosion Control Logs Diversion Berms/Dikes Diversion Ditches Check Dams Rock Rip Rap Protection Landscaping of Disturbed Areas Sweep Soil From Paved Areas With Pick -Up Broom Sweep Soil From Paved Areas Manually Stabilized Construction Entrance Water Truck To Control Dust Brush/Grassy Barrier Preservation of Existing Vegetation Sequential Construction Techniques C. C C C \ ' C ( C. �/ m 11) E3 /' , 2\ CD n / - @ # 0 /i 5 d( / CO « - 79 k n g r / CD /O Q 0 CA _ 5 .-.- J - m « $; d J CO « / 3 After Pavement After Pavement Start of Site Const. Start of Site Const. Start of Site Const. Start of Site Const. K 0 # » §\ 2 $ E es $ I 0. =, 77« 2 3 co. k a KK 0 a k u 3 w i D 3& 0 0 k 3 9 K 0 0 7 > 0 ], i / 3 .3 K 0 0 7 \ a)¢ A» \ al & 2 0 9 \ 3 / a s K 0 7 7 > 3 2 k 0) 5 K o 7 9 k 0 3 ¥ a — . Monthly 1 Monthly Monthly c K o K= 0» %' 1 Monthly INSPECTION SCHEDULE 1 1 1 1 1 1 1 1 1 1 PETROLEUM PRODUCTS, DETERGENTS, SOLVENT, SEDIMENTS, & ANTIFREEZE 77 (D CD 0 0 Sh1 0 ❑ cnO 0) D3 N 0 ED, 0 5 a (D m (0 m (D (O Po d3 (D DS 0 c) -o (T 5 t x ✓ 0 0 O 0) 0 (A (' Z Ca 1 B 0 D➢ m c m 0 CO 0 0 0 0 (n Iv 0 -4. 0 c #su03 Jo 'JelS Go co z. O 0 C70 O 0 m vc Am m -I A 1 0 z 0 0 0) 0z 0m xm m m 0 ("0 C m Z m c� r m cn m c m z m z 7> z n m SEDIMENTS, and OTHER CONSTRUCTION WASTE POTENTIAL POLLUTANTS t S 3.4 - SOLID WASTE MANAGEMENT CONTROL BMP SHOWN ON PLAN INDICATES BMP TO BE USED 1 at YES Waste Removal By Licensed Hauler Containers Away From Inlets and Surface Water Prohibit Hose Out of Containers On -Site Provide Roll -Off Containers for Inert Materials Collect Trash On a Daily Basis Provide Covered Waste Bins Start of Building(s) Start of Building(s) Start of Building(s) Cn a 0 CO C 0. (0 in I Start of Building(s) IMPLEMENTATION DATE Monthly Monthly Monthly Monthly Monthly INSPECTION SCHEDULE PETROLEUM PRODUCTS, ASPHALTS, SOLVENTS, AND PAINT v iD 3 0 ca0 su 0 m 0 0 0 m to tar 0 N Co c CD Cf1 c 0- 0 0 0 -10 m 3 0 rn om, r m tS 0 0 0 z CD M m 0 y [a 0; to tO ro 0 to 0 0) m CD N go 0 CO in t z rn CA 0 co r — - 1 0 m m to rn 0 to 7 0 2 n 0 m N 2 1 1 1 1 1 1 1 1 1 1 C0 0 co c 0. CD CD Mhi 0 CU to c a CO CO (0 H CA a 0 a 5' w (0 0 ca c Q to 0 3 0 0 0 _3 0 5 0 (02 0 tp 2 mn c� rr 0 m2 C.4 2 i 2 0 0 0 -nz G7 0 0a PETROLEUM PRODUCTS, SOLVENTS, ASPHALT OILS POTENTIAL POLLUTANTS Cover Inlets When Applying Tack Coats, etc. Avoid Paving During Wet Weather Require Subcontractor Employee Training Use Offsite Maintenance Shops For Major Repairs Secondary Containment Parking Area(s) Designate Parking Area(s) For Machinery Require Subcontractor To inspect Vehicle/Machinery Prohibit Vehicle/Machinery Wash Down Onsite 3.6 - ASPHALT PAV (None At CONTROL BMP 1 INDICATES BMP TO BE USED Start of Const Start of Const 1 Start of Const Start of Const Start of Const Start of Const I 1 During Paving Operations 1 n.a. Monthly 0K co 0 7- ,, K 0 3- INSPECTION SCHEDULE 1 1 1 1 1 1 1a, 1 1 1 r 1 1 HUMAN WASTE, CHEMICALS, AND TRASH as 0 {7 0 5 •c r 0 0) "D 0 0 —♦ 0 m itiW -11 0 3 (1) m CD cn C7 rn GO 0 C) E 0 0 0 m v 7 0 fD 0 0 m O co' co in 0 ID tnfD 0_ i1) co 0 fa Un Iu 0 0 0 (4, 0 0 5 r- 0 ru (D 0 0 0) 0 m -1 O m N -n 0 0 0 CD D. rpi CD ill ET 0 0 0 0 2 0 > z CO -4 -4 0 co r en ti 0 to m m 0 a -[ m w x 0 z 0 z Z+ r- m -Im M 0 2 Vi Z 0 CO Z c -a r5 m SAND GRAVEL, CHEMICALS, AND SEDIMENTS I\ fp fD Co c cr f) 0 n 0 m 3 0 fo rn -4 as is -n 0 3 n 0 0 m 0 -n 0 3 m iU i0 E: i0 m C fn un 3 i0 c z 0 -n (D in 0 n co iD dINS 1OMINO0 x 0 a 0 z N z isuoo lieis ;suaD;o pals Cn 0 0) w 0 0 v r- 03 Z m-1 O x 0 2 z rn -4 rn CD rn 2 0 m m 2 7 0) 0 5- 0 0 0 FERTILIZERS, HERBICIDES, AND SEDIMENTS .0 fD C0 Cs n 0 0 0 m 3 0 *�c rn Ca --1 v 5' s0 Remove Vegetative Debris & Solid Waste From Site c in Co —1N fD 0 Z7 0 0 -4 rn 0 9, m Z3 O 0 m m 0 c 0 m IN to r 2 0 co rn 0 m —I 0 2 m co c 0. [0 G70m Cr 0 0 rn co 93 rn 0. 0 c 0 a al P in 0 4o r v 0. N 0 v 0 0 'C7 N 0) 0 7 N 0 3 'C 0 5 •C 0 m x -U 00 c� r O m 0 0 -41z 0 f w d7 0 0 S m a z 1 11, t 1 1 r 1 1 1 op 1 1 SEDIMENTS, CHLORINE, CHEMICALS, GREASE & OIL, TOXIC MATERIALS o� r-° az zp GO 0, CD _0 3 fD fd -n 0 0 m [1 to iS 0 iD cu z z a -s 0 -a-d m y w 3 -4 0 w m 47 rnD t isuoD Jo pe}s }suoD jo pels isuoo jo }Je;s (I7 0 0 0 (1) ni 0 -440 0 ;suoD }o }Je}s 1 1 1 1 1 1 i 1 1 e 1 PART 4 FINAL STABILIZATION & MANAGEMENT The post construction permanent control practices that will be implemented are presented on the following table: 1 ✓ ✓ ✓ ✓ ✓ ✓ FINAL STABILIZATION AND MANAGEMENT PERMANENT CONTROL PRACTICES 1 INDICATES PRACTICE TO BE USED Pump Station Wet Pond Constructed Wetland Detention Basin, Extended Detention Basin, Extended With Park Storm Drain System Signs Biofilter Sand/Oil Separator Covered Material Storage and Handling Area(s) Secondary Containment Area Covered Waste Storage Area Graded Pavement/Concrete Stream Bank Stabilization Minimization Of Impervious Areas Use Of Efficient Irrigation System(s) Interior Drains Not Connected To Strom Drain System Vehicle Wash Pad Minimize Roof Drainage To Pavement Prompt Landscaping Seeding of Disturbed Areas Rock Erosion Controls SHOWN ON PLAN = YES ✓ ✓ ✓ ✓ ✓ ✓ I 1 1 1 1 1 1 1 1 1 PART 5 INSPECTION & MAINTENANCE Routine comprehensive inspections can be found on the following pages. S3IdO01VNO111OOb 3)4VV Ilea idea Jo(eyy Jaw pub (0 co —4 Qt UI A w 32if1Sb3W 3/11103 * )3 v 4 = straw 3A1133.-� 0 0 0 r mm rn m 4r swJag/sago1lci uolsJama Ca w m 5 sallol aER2I+od co e3uo0 aBeio;s co 0. I al- rD co Co .13 ro to CIL 07 0 0 co 42. rn 0 F sulseg 43320 C co I ; ; 1 GILD dSNl b]lb AON3f1O3ad 11111111111 111 111111111 111111111111111 I 111111111111111111111 111111111111111111111 11111111111111110 IIIIIIIIIIIIIIIIII 1111111 1111 1111111 0 ill 1 PIO 0 11 1 0 11 Hill 111111111 0111 I 11 I Z0 o rn Z m m o S3llll3S H331 3V ld :F;gPB n 0 m X 9018E /.9O /k,33 1 1 1 1 1 1 1 1 PART 6 CERTIFICATION PERMIT 1 1 1 1 1 1 1 1 1 1 1 1 DRAINAGE CALCULATIONS and DETENTION DESIGN For proposed FRAC TECH PARACHUTE, COLORADO December 11, 2006 2402-001 Prepared by: ATKINS AND ASSOCIATES, INC. 518 28 Road, Suite B-105 Grand Junction, Colorado 81501 P 970.245.6630 F 970.245.2355 ,.coli7v$ YFryi yr IT ;4�;;Vl:rs�j 1 1 1 1 1 1 1 1, 1 1 1 1 1 r1 1 TABLE OF CONTENTS Design Summary Drainage Area Map Discharge Calculations 2 -Year Storm Event Analysis 25 -Year Storm Event Analysis 1 1 1 1 1 1 1 1 1 1 1 1 v 1 1 Design Summary: Frac Tech is proposing to construct a maintenance facility on approximately 13.5 acres located near Parachute. Currently, the site is undeveloped and has 3-6% slopes. As part of the site development, detention ponds were designed to accommodate the 2 -year and 25 -year storm events. Discharge rates from the ponds were limited to existing flow conditions for both events. As depicted on the enclosed Drainage Area Map, current storm water enters one of two existing culverts under State Highway 6. Therefore, two detention ponds were necessary to restrict the discharge to less than existing flow conditions for each culvert. In addition, a substantial amount of flow passes through the site from north of Interstate 70. In an effort to reduce the flows of this storm water, a detention pond was designed north of the site as well. The reduced discharge from this pond travels alongside the site into the southwest detention pond. Methodology The first step of the detention analysis was to determine the allowable pond discharges by calculating the pre -developed flows. The next step was to delineate the areas contributing to each pond and subsequently create each area's hydrograph. These hydrographs were then routed through their respective detention pond using the software package Hydrographs 2004 by Intellisolve. The outflow hydrograph was then analyzed to confirm that existing flows had not been exceeded. All discharge calculations and software output files are included with this report. North Detention Pond The sole purpose of the north detention pond was to reduce the flow of the storm water entering the site from the north. Therefore, the pond outflow hydrograph was not limited to any particular flow. An outlet was chosen that would convey enough flow to not overtop the dam. To be conservative, the 100 -year storm was also modeled to ensure adequate storage was provided. The north detention pond has the following characteristics: * The top elevation of the detention pond is 5059.00 ft. • . The bottom elevation of the detention pond is 5053.50 ft. • The flowline elevation of the detention outlet structure is 5053.50 ft. • The outlet structure for the detention pond is a 24 -inch HDPE pipe. • The flowline of the grass -lined emergency spillway is 5058.00 ft. Using these characteristics, the model suggests that the discharges for the 2 - year and 25 -year storm events were 12.0 cfs and 27.1 cfs, respectively. The 1 1 1 1 1 1 1 1 1 1 1 1 1 r 1 1 outfiow hydrograph for each storm event was then combined with the respective southwest detention pond inflow hydrograph. Southwest Detention Pond The proposed southwest detention pond has the following characteristics: • The top elevation of the detention pond is 5040.00 ft. • The bottom elevation of the detention pond is 5034.00 ft. • The flowline elevation of the outlet structure is 5034.00 ft. • The outlet structure for the detention pond is an 18 -inch HDPE pipe. • The flowline of the grass -lined emergency spillway is 5039.00 ft. Using these parameters, a detention model was created and yielded the results found in Table 1. Please note that a small portion of the storm water does not flow through the detention pond. Therefore, this by-pass flow is added to the pond discharge to calculate the total flow released. Table 1 Description Storm Event 2 -Year 25 -Year Allowable Release Rate (cfs) 13.9 57.4 Pond Discharge (cfs) 9.8 16.4 By -Pass Flow (cfs) 0.5 1.9 Total Discharge (cfs) 10.3 18.3 Maximum Elevation (ft) - - 5036.57 5038.96 Southeast Detention Pond The proposed southeast detention pond has the following characteristics: • The top elevation of the detention pond is 5035.00 ft. • The bottom elevation of the detention pond is 5030.50 ft. • The flowline elevation of the outlet structure is 5030.50 ft. • The outlet structure for the detention pond is a 10 -inch HDPE pipe. • The flowline of the grass -lined emergency spillway is 5034.00 ft. Another detention model was created for the southeast detention pond and the results can be found in Table 2. Note that all flow in this watershed passed through the detention pond, thus eliminating a by-pass flow. 1 M 1 1 1 1 1 1 r 1 1 1 1 1 1 1 1 Table 2 Description Storm Event 2 -Year 25 -Year Allowable Release Rate (cfs) 2.7 11.3 Pond Discharge (cfs) 2.4 3.8 13y -Pass Flow (cfs) - - Total Discharge (cfs) 2.4 3.8 Maximum Elevation (ft) 5031.74 5033.57 Conclusions Three detention ponds were modeled to determine the developed discharge rates to existing culverts. The findings of this report suggest that existing flows were not exceeded. Drainage Area Map ?t / I +\ / a r 11 IS ../7 Y _.r Y" y 51•'!�W RJ},`'��/ `'-•,�.. 1 y, S\ ^'- %N.,..7/ � �! ‘,.._.../ g, ren i\a t `v� � Lam_ e}c: .rte \+lei Y 4 1''� = N\` 4' i •, r'`,' \r'''t ' _ - i - ,�i l �,r{ t' vi .. 1r� ,i•L ,, t ti---'fJ as ti % , V :.5 "/'�''+ 1_��--� a , ,, ., \-''rf 1 r �/`y� s f l�.� � 1 ` ,r 1, J't 4♦ t 1 t Inti....7„.„5--c' <I ! M1- r 4♦t 1 — {r 7,. r +°)../-1171.. __� r i t ,�'1 i • .moi `'4r,.t._� % i�i \ ;—; / 111 ,.../....).., •,.�,.` Pial .-1"/ j``.�/ i 1� +�``I'r. '\._�••' .. i $ 1 1 1 ♦ 1 //! 1 1} 9}1 1 (-N-/ ♦ f t ti, a C-'--+ a �.+f a ti✓"� 1+~ 1 r--: F,`�'/ 'r -i ````--+'!J i •.r`♦;d.t �+ 1 --r 1 1 { J ) 1 ' \ 11? f---..--1\ - ,.`--,./ { i ♦_.f tr" + "'�� ` - +!r Ir44° f f�; .���1^ `� ((�1 r"L� �s J 1 + f,�5�1`1}F 1 \ ' /! r S Y" .1 : r J `. + t L.._- derJ l j i k 1.0,----,... ft; ; a' t om`-r.+� r -.v s 3 --. !)11\''.,`‘,:-t w A ' i+ i e\ t. a a ` •e ------------- x 9 6 a _ a H o 0 x iPiE v Q 0U 00 MI 1 U 0 lir 110 0 .4110711 AYO ASSOVAr€5. f.0 516 i! FNw, Sale 6105 fra„di 1.200 Cdaada 61501 PM/156630 F 9/0 31S 7755 6 7 Discharge Calculations 2-Year Storm Event Analysis Table 2 Description Conclusions Three detention ponds were modeled to determine the developed discharge rates to existing culverts. The findings of this report suggest that existing flows were not exceeded. 1 1 1 1 1 1 1 Storm Event 2 -Year 25 -Year Allowable Release Rate (cfs) 2.7 , 11.2 Pond Discharge (cfs) 2.3 4.0 By -Pass Flow (cfs) - - Total Discharge (cfs) 2.3 4.0 Maximum Elevation (ft) 5031.78 5033.72 Conclusions Three detention ponds were modeled to determine the developed discharge rates to existing culverts. The findings of this report suggest that existing flows were not exceeded. 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 r 1 1 Description Storm Event 2 -Year 25 -Year Allowable Release Rate (cfs) 13.9 57.4 Pond Discharge (cfs) 9.7 16.4 By -Pass Flow (cfs) 0.5 1.7 Total Discharge (cfs) 10.2 18.1 Maximum Elevation (ft) 5036.54 _ 5038.98 Description Storm Event 2 -Year 25 -Year Allowable Release Rate (cfs) 2.7 11.2 Pond Discharge (cfs) 2.3 4.0 By -Pass Flow (cfs) - - Total Discharge (cfs) 2.3 4.0 Maximum Elevation (ft) _ 5031.78 5033.72 1 1 1 1 1 1 1 1 1 1 1 1 1 r• 1 1 IDF DATA Modified from Mesa County* Time (min) 2 -Year Intensity (in/hr) 100 -Year Intensity (inlhr) Time (min) 2 -Year Intensity (in/hr) 100 -Year Intensity (in/hr) _ 5 1.11 4.41 33 0.51 2.03 6 1.07 4.23 34 0.50 1.99 7 1.03 4.07 35 1 0.49 1.95 8 0.99 3.92 36 0.49 1.91 9 0.95 3.77 37 0.48 1.88 10 0.92 3.64 38 0.47 1.85 11 0.89 3.52 39 0.46 1.82 12 0.86 3.41 40 0.45 1.78 13 0.83 3.30 41 0.45 1.75 14 0.81 3.20 42 0.44 1.73 15 0.79 3.10 43 0.43 1.70 16 0.76 3.02 44 0.42 1.67 17 0.74 2.93 45 0.42 1.64 18 0.72 2.85 46 0.41 1.62 19 0.70 2.78 47 0.40 1.59 20 0.68 2.70 48 0.40 1.57 21 0.67 2.64 49 0.39 1.55 22 0.65 2.57 50 0.39 1.53 23 0.64 2.51 51 0.38 1.50 24 0.62 2.45 52 0.38 1.48 25 0.61 2.40 53 0.37 1.46 26 0.59 2.34 54 0.37 1.44 27 0.58 1 2.29 55 0.36 1.42 28 0.57 2.24 56 0.36 1.40 29 0.56 2.20 57 0.35 1.38 30 0.54 2.15 58 0.35 1.37 31 0.53 2.11 59 0.34 1.35 32 0.52 2.07 60 0.34 1.33 Source: Mesa County 1992 (modified) Adjustments made from NOAA Atlas Precipitation Maps for Parachute, CO to relate rainfall intensities to those from Grand Junction, CO area 2 -Year Multiplier = 1.2 25 -Year Multiplier = 1.0 (factored against GJ area 100 -year rainfall intensity) NOAA 24-HOUR PRECIPITATION FOR Parachute, CO 2 -Year = 1.2 inches 25 -Year = 2.2 inches 1(2)= 1.2*26.71 1(Tc + 19.01) 1(25) = 104.94 / (Tc + 18.80) RAINFALL INTESITY DURATION FREQUENCY DATA EXHIBIT 6.0 1 1 1 1 1 1 r' 1 1 5 C CALCUATION Tc CALCULATION 1 I �n if I, aS m� w., n313 .; d. st. s t. F K w . E E w t : a ec es E° r _. Sia 0 e 0m __ .. - .en 2• re,- .. .,. as '',... 0 4 g g ... M., g .. e __ V 22 A rv.. g.g 2I' C1 AI C_ A: C3 A3 G A4 Cnm{nsele CC 1 i T.' u t s� '.,ee 22 ,, _. an 8 C3 RR An c p sa C e O C e Fi i _ an c c F. s c ` y E 14 _ 0 i �m P. as =a ,J C ..... o o a s �a. Pa a c cc gzq e = 22 _ c i A i, F r c C 0. c ea c e e Fir II.s F - %o 71 ..- _ _ ... .. - - -- . ICNI al$eINV ti,. 11.LVti".11c; H1 N1 -5V U � i ©Yy sa =x;. - - Ssx ciao - E.xy P4 f a n 2 -Year Storm Event Analysis 1 Table of Contents TEST2_Site Developed Detention 10-26-06 gpw Hydraflow Hydrographs by intelisolve 2 - Year Hydrograph Reports Hydrograph No. 1, Rational, 2 -Yr Developed to N Hydrograph No. 2, Reservoir, 2 -Yr N Pond Pond Report Hydrograph No. Hydrograph No. Hydrograph No. Pond Report Hydrograph No. Hydrograph No. Pond Report Thursday, Oct 26 2006, 5:4 PM 1 1 2 3 4 5 6 7 8 9 10 3, Rational, 2 -Yr Developed to SW 4, Combine, 2 -Yr Combined to SW 5, Reservoir, 2 -Yr SW Pond 6, Rational, 2 -Yr Developed to SE 7, Reservoir, 2 -Yr SE Pond I Hydrograph Piot 1 1 1 1 1 1 1 1 1 1 1 14, 1 1 Hydraflow Hydrographs by Intelisolve Hyd. No. 1 2 -Yr Developed to N Hydrograph type Storm frequency Drainage area Intensity IDF Curve = Rational = 2 yrs = 67.020 ac = 1.105 in/hr = ParachuteCO.IDF Thursday, Oct 26 2006, 5:4 PM Peak discharge Time interval Runoff coeff. Tc by User Asc/Rec limb fact = 14.81 cfs = 1 min = 0.2 10.00 min = 1/1.67 Q (cfs) 15.00 12.00 9.00 8.00 3.00 0.00 Hydrograph Volume = 11,862 cuft 2 -Yr Developed to N Hyd. No. 1 -- 2 Yr 0.0 0.1 Hyd Na. 1 0.2 0.3 0.3 0.4 Q (cfs) 15.00 12.00 9.00 6.00 3.00 0.00 0.5 Time (hrs) 1 Hydrograph Plot Hydraflow Hydrographs by Intelisolve Hyd. No. 2 2 -Yr N Pond 1 1 Hydrograph type = Reservoir Storm frequency = 2 yrs Inflow hyd. No. = 1 Reservoir nage = N Pond Thursday, Oct 26 2006, 5:4 PM Peak discharge = 12.26 cfs Time interval = 1 min Max. Elevation = 5055.16 ft Max. Storage = 1,745 cuft Storage Indication method used. 1 1 Q (cfs} 15.00 1 Igo 12.00 1 1 1 1 1 1 1 9.00 6.00 3.00 0.00 Hydrograph Volume = 11,550 cuft 2 -Yr N Pond Hyd. No. 2 -- 2 Yr 0.0 0.1 0.2 0.3 Hyd No. 2 Hyd No, 1 0.3 0.4 0.5 0.6 0.7 Q (cfs) 15.00 12.00 9.00 6.00 3.00 0.00 Time (hrs) 2 Pond Report 1110 Hydraflow Hydrographs by intelisoive Pond No. 3 - N Pond Pond Data 1 1 1 1 1 1 1 1 1 1 1 1 3.00 2.00 - Pond storage is based on known contour areas. Average end area method used. Stage / Storage Table Stage (ft) Elevation (ft) Contour area (sgft) incr. Storage (cuft) Total storage (cuft) 0.00 5053.50 00 0 0 1.50 5055.00 1,640 1,230 1,230 2.50 5056.00 4,680 3,160 4,390 3.50 5057.00 6,960 5,820 10,210 4.50 5058.00 9,620 8,290 18,500 5.50 5059.00 12,815 11,218 29,718 Thursday, Oct 26 2006, 5:4 PM Culvert / Orifice Structures Weir Structures [A] [D] [C] [D] [A] [B] [C] [D] Rise (In) = 24.00 0.00 0.00 0.00 Crest Len (ft) = 0.00 0.00 0.00 0.00 Span (in) = 24.00 0.00 0.00 0.00 Crest El. (ft) = 0.00 0.00 0.00 0.00 No. Barrels = 1 0 0 0 Weir Coeff. = 0.00 0.00 0.00 0.00 Invert El. (ft) = 5053.50 0.00 0.00 0.00 Weir Type - --- -- - - Length (ft) = 55.00 0.00 0.00 0.00 Multi -Stage = No No No No Slope (%) = 4.50 0.00 0.00 0.00 N -Value = .011 .000 .000 .000 Orif. Coeff. = 0.60 0.00 0.00 0.00 Multi -Stage = nra No No No Exfiltration = 0.000 in/hr (Contour) Tailwater Elev. = 0.00 ft Stage (ft) 6.00 5.00 4.00 Stage / Discharge Note. Culvert/Orifice outflows have been analyzed et and outlet car mI. 1.00 0.00 - 0.00 3.00 6.00 9.00 12 00 15 00 18.00 21 00 24.00 27 00 30 00 1 1 Total 0 Stage (ft) 6.00 5.00 4.00 3.00 2.00 1.00 0.00 33 00 Discharge (cfs) 1 1 1 1 1 1 Hydrograph P I of Hydraflow Hydrographs by Neils°lve Hyd. No. 3 2 -Yr Developed to SW Hydrograph type Storm frequency Drainage area Intensity IDF Curve = Rational = 2 yrs 13.620 ac 1.001 inlhr = ParachuteCO.IDF Thursday, Oct 26 2006, 5:4 PM Peak discharge Time interval Runoff coeff. Tc by User Asc/Rec limb fact = 7.50cfs = 1 min = 0.55 = 13.00 min = 1/1.67 2 -Yr Developed to SW Hyd. No. 3 — 2 Yr Hydrograph Volum = 7,816 oust 1 1 1 1 1 le 1 1 0.0 0.1 Hyd No. 3 0.2 0.3 0.3 0.4 0.5 Q (cfs) 8.00 6.00 4.00 2.00 0.00 0.6 Time (firs) 4 1 H d ro g ra h Piot Y � � r 1 1 1 1 1 1 1 1 1 Hydraflow Hydrographs by Intelisolve Hyd. Na. 4 2 -Yr Combined to SW Hydrograph type = Combine Storm frequency = 2 yrs Inflow hyds. = 2, 3 Thursday, Oct 26 2006, 5:4 PM Peak discharge Time interval = 19.76 cfs = 1 min Q (cfs) 21.00 2 -Yr Combined to SW Hyd. No, 4 -- 2 Yr PAI 18.N 1 IN El 15.00 12.00 eoo -Al 6.00 r l-ik'lli&I NIL I Vi *44A, i 3 Hydrograph Volume = 19,200 tuft 1 1 1• 1 1 0.00 0.0 0.1 Hyd No. 4 0.2 0.3 0.3 Hyd No. 2 Hyd No. 3 0.4 0.5 Q (cfs) 21.00 18.00 15.00 12.00 9.00 6.00 3.00 0.00 0.6 Time (hrs) 1drograph Plot Y bHydraflow Hydrographs by Intelisolve Thursday, Oct 26 2006, 5:4 PM Hyd. No. 5 I2 -Yr SW Pond Hydrograph type = Reservoir Peak discharge = 9.67 cfs Storm frequency = 2 yrs Time interval = min Inflow hyd. No. = 4 Max. Elevation = 5036.54 ft Reservoir name = SW Pond Max. Storage = 9,503 cuft IStorage Indication method used, Hydrograph Volume = 19,193 cuft 1 1 1 1 1 1 1 1 140 1 1 2 -Yr SW Pond Q (cfs) Hyd. No. 5 -- 2 Yr Q (cfs) 21.00 21.00 18.00 15.00 12.00 9.00 6.00 3.00 0.00 0.0 0.2 0.3 0.5 18.00 15.00 12.00 9.00 6.00 - 3.00 Hyd No. 5 Hyd No. 4 0.7 0.8 1.0 1.2 1.3 0.00 1.5 Time (hrs) 6 1 1 1 1 1 1 1 r 1 1 1 1 1 1 4 1 1 Pond Report Hydraflow Hydrographs by Intelisoive Pond No. 1 - SW Pond Pond Data Pond storage is based on known contour areas. Average end area method used. Stage 1 Storage Table Stage (ft) Elevation (ft) Contour area (sqft) Incr. Storage (cuft) Total storage (cuft) 0.00 5034.50 00 0 0 0.25 5034.75 2,000 250 250 0.50 5035.00 3,650 706 956 1.50 5036.00 4,840 4,245 5,201 2.50 5037.00 11,005 7,923 13,124 3.50 5038.00 17,075 14,040 27,164 4.50 5039.00 24,075 20,575 47,739 5.50 5040.00 32,500 28,288 76,026 Thursaay, Oct 26 2006, 5;4 PM Culvert 1 Orifice Structures Weir Structures [A] [B] IC] [D] [A] [B] [C] [D] Rise (In) = 18.00 0.00 0.00 0.00 Crest Len (ft) = 0.00 0.00 0.00 0.00 Span (in) = 18.00 0.00 0.00 0.00 Crest El. (ft) = 0.00 0.00 0.00 0.00 No. Barrels = 1 0 0 0 Weir Coeff. = 3.33 0.00 0.00 0.00 Invert El. (ft) = 5034.50 0.00 0.00 0.00 Weir Type = -- - - -- Length (ft) = 45.00 0.00 0.00 0.00 Multi Stage = No No No No Slope (%) = 1.00 0.00 0.00 0.00 N -Value = .011 .013 .000 .000 Orlf. Coeff. = 0.60 0.60 0.00 0.00 Multi -Stage = n!a No No No Exfiltratlon = 0.000 in/hr (Contour) Tailwater Elev. = 0.00 ft Stage (ft) 6.00 5.00 4.00 3.00 2.00 1.00 0.00 Note; CuhrertlOt5ce outflows have been analyzed under inlet and outlet control. Stage / Discharge 0.00 2.00 Total 0 4.00 6.00 8.00 10 00 12 00 14 00 16 00 1800 Stage (ft) 6.00 5.00 4.00 3.00 2.00 1.00 0.00 20 00 Discharge (cfs) 1 1 1 1 1 1 1 1 1 1 1 14 1 Hydrograph Piot Hydraflow Hydragraphs by Intelisolve Hyd. No. 6 2 -Yr Developed to SE Hydrograph type Storm frequency Drainage area Intensity IDF Curve = Rational = 2 yrs = 15.740 ac = 1.068 in/hr = ParachuteC©.IDF Thursday, Oct 26 2006, 5:4 PM Peak discharge Time interval Runoff coeff. Tc by User Asc/Rec limb fact = 5.72 cfs = 1 min = 0.34 = 11.00 rain = 1/1.67 Q (cfs) 6.00 5.00 4.00 3.00 2.00 1.00 0.00 2 -Yr Developed to SE Hyd. No.6--2Yr 1 0.0 0.1 Hyd No. 6 0.2 0.3 Hydrograph Volume = 5,036 cuft 0.3 0.4 Q (cfs) 6.00 5.00 4.00 3.00 2.00 1.00 0.00 0.5 Time (hrs) 8 1 Hydrograph Plot r 1 1 1 1 1 1 r 1 1 1 1 1 lo 1 1 Hydraflow Hydrographs by Intelisolve Thursday, Oct 26 2006, 5:4 PM Hyd. No. 7 2 -Yr SE Pond Hydrograph type = Reservoir Storm frequency = 2 yrs Inflow hyd. No. = 6 Reservoir name = SE Pond Peak discharge = 2.29 cfs Time interval = 1 min Max. Elevation = 5031.78 ft Max. Storage = 2,564 cuft Storage Indication method used. Hydrograph Volume = 4,969 cuft Q (efs) 2 -Yr SE Pond Hyd. No. 7 — 2 Yr 0.0 0.2 Hyd No. 7 0.3 0.5 Hyd No. 6 0.7 0.8 1.0 1.2 1.3 Q (cfs) 6.00 5.00 4.00 3.00 2.00 - 1.00 0.00 1.5 Time (hrs) 1 1 1 1 1 1 1 r 1 1 1 1 1 1 4 1 1 Pond. Report Hydrafiow Hydrographs by lntelisolve Pond No. 2 - SE Pond Pond Data Pond storage is based on known Stage i Storage Table Stage (ft) Elevation (ft) 0.00 0.50 1.00 1.50 2.50 3.50 4,50 5030.50 5031.00 5031.50 5032.00 5033.00 5034.00 5035.00 contour areas. Average end area method used. Contour area (soft) 00 1,500 3,000 4,530 6,320 8,290 10,150 lncr. Storage (cuff) Total storage (cuft) 0 375 1,125 1,883 5,425 7,305 9,220 0 375 1,500 3,383 8,808 16,113 25,333 Thursday, Oct 26 2006, 5:4 PM Culvert ! Orifice Structures [A] [B] [C] [DJ Rise (in) = 10.00 0.00 0.00 0.00 Span (in) = 10.00 0.00 0.00 0.00 No. Barrels = 1 0 0 0 Invert El. (ft) = 5030.50 0.00 0.00 0.00 Length (ft) = 105.00 0.00 0.00 0.00 Slope (%) = 1.00 0.00 0.00 0.00 N -Value = .011 .013 .000 .000 Qrif. Coeff. = 0.60 0.60 0.00 0.00 Multistage = nfa No No No Weir Structures Crest Len (ft) Crest El. (ft) Weir Coeff. Weir Type Multi -Stage [A] [B] [C] [0] = 0.00 = 0.00 = 3.33 = No 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 No No No Exfiltration = 0.000 irtlhr (Contour) Tailwater Elev. = 0.00 ft Stage (ft) 5.00 4.00 3.00 2.00 1.00 Note: Culvert/0rifice outflows have been analyzed under inlet and cutlet control. Stage / Discharge 0.00 0.00 0.50 1.90 Total Q 1.50 2.00 2.50 3.00 3.50 4.00 4.50 Stage (ft) 5.00 4.00 3.00 2.00 - 1.00 0.00 5.00 Discharge (cfs) 10 1 1 1 1 1 1 1 1 1 1 1 25 -Year storm, Event Analysis 1 1 1 1 1 1 1 1 1 1 1 1 Table of Contents TEST2_Site Developed Detention 10-26-06,gpw Hydratiow Hydrographs by Intelisolve 25 - Year Hydrograph Reports Hydrograph No. 11, Hydrograph No. 12, Pond Report Hydrograph No. 13, Hydrograph No. 14, Hydrograph No. 15, Pond Report Hydrograph No. 16, Hydrograph No. 17, Pond Report Thursday, Oct 26 2006, 5:5 PM 1 Rational, 25 -Yr Developed to N 1 Reservoir, 25 -Yr N Pond 2 3 Rational, 25 -Yr Developed to SW 4 Combine, 25 -Yr Combined to SW 5 Reservoir, 25 -Yr SW Pond 6 7 Rational, 25 -Yr Developed to SE 8 Reservoir, 25 -Yr SE Pond 9 10 1'Hy. Plat dragraph 1 1 1 1 1 1 r 1 1 1 1 1 Hydraflow Hydrographs by Interisolve Hyd. No. 11 25 -Yr Developed to N Hydrograph type Storm frequency Drainage area Intensity IDF Curve = Rational = 25 yrs 67.020 ac = 3.644 inlhr ParachuteCO.IDF Thursday, Oct 26 2006, 5:4 PM Peak discharge = 61.05 cfs Time interval = 1 min Runoff coeff. = 0.25 Tc by User = 10.00 min Asc/Rec limb fact = 1/1.67 Q (cfs) 70.00 60.00 50.00 40.00 30.00 20.00 10.00 0.00 Hydrograph Volume = 48,902 cuft 25 -Yr Developed to N Hyd. No. 11 -- 25 Yr 0.0 0.1 Hyd No. 11 0.2 0.3 0.3 0.4 Q (cfs) 70.00 60.00 50.00 40.00 30.00 20.00 10.00 0.00 0.5 Time (hrs) 1 Hy. drograph Plat r 1 1 1 1 1 1 1 r 1 1 1 Hydraflow Hydrographs by Interisolve Hyd. No. 12 25 -Yr N Pond Hydrograph type Storm frequency Inflow hyd. No. Reservoir name = Reservoir = 25 yrs = 11 N Pond Thursday, Oct 26 2006, 5:4 PM Peak discharge Time interval Max. Elevation Max. Storage 28.61 cfs = 1 min = 5058.08 ft 19,386 cult Storage Indication method used. Q (cfs) 70.00 60.00 50.00 40.00 30.00 1 20.00 I 10.00 I 0.00 0.0 Hydrograph Volume = 47,619 cuft 25 Yr N Pond Hyd. No. 12 -- 25 Yr 14, 1 1 0.1 Hyd No. 12 0.2 0.3 0.3 Hyd No. 11 0.4 0.5 0.6 Q (cfs) 70.00 60.00 50.00 40.00 30.00 20.00 10.00 0.00 0.7 0.8 0.8 Time (hrs) 2 1 1 1 1 1 1 1 1r 1 1 1 1 1 1 1 1 Pond Report Hydraflow Hydrographs by Intelisolve Pond No. 3 - N Pond Pond Data Pond storage is based on known contour areas. Average end area method used. Stage 1 Storage Table Stage (ft) 0.00 1.50 2.50 3.50 4.50 5.50 Elevation (ft) 5053.50 5055,00 5055.00 5057.00 5058,00 5059.00 Contour area (soft) 00 1,640 4,680 6,960 9,620 12,815 Incr. Storage (cuft) Total storage (cuft) 0 1,230 3,160 5,820 8,290 '11,218 0 1,230 4,390 10,210 18,500 29,718 Thursday, Oct 26 2006, 5:4 PM Culvert 1 Orifice Structures Rise (in) Span (In) No. Barrels Invert El. (ft) Length (ft) Slope (%) N -Value Orlf. Coeff. Multi -Stage [A] [B] [C] [D] = 24.00 0.00 0.00 0.00 = 24.00 0.00 0.00 0.00 = 1 0 0 0 = 5053.50 0.00 0.00 0.00 = 55.00 0.00 0.00 0.00 = 4.50 0.00 0.00 0.00 = .011 .000 .000 .000 = 0.60 0.00 0.00 0.00 = nla No No No Weir Structures Crest Len (ft) Crest El. (ft) Weir Coeff. Weir Type Multi Stage [Al [Et] [C] [D] = 0.00 = 0.00 = 0.00 = No 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 No No No Exfiltration = 0.000 inlhr (Contour) Tailwater Elev. = 0.00 ft Stage (ft) 6.00 5.00 4.00 3.00 2.00 1.00 0.00 Note: Culvertl(hWtce outflows have been analyzed under inlet and outlet control, Stage / Discharge 0.00 3.00 Total Q 6.00 9.00 12 00 15 00 18 00 21 00 24 00 27 00 30 00 Stage (ft) 6.00 5.00 4.00 - 3.00 - 2.00 1.00 0.00 33 00 Discharge (cfs) 1 1 1 1 r to 1 1 Hydrograph Plot Hydraflow Hydrographs by ontelisolve Hyd. No. 13 25 -Yr Developed to SW Hydrograph type Storm frequency Drainage area Intensity IDF Curve = Rational = 25 yrs = 13.620 ac = 3.300 in/hr = ParachuteCO.IDF Thursday, Oct 26 2006, 5:4 PM Peak discharge Time interval Runoff coeff. Tc by User Asc/Rec limb fact = 26.07 cfs 1 min = 0.58 = 13.00 min = 1/1.67 Q (cfs) 28.00 24.00 20.00 1 16.00 1 1 12.00 1 8.00 4.00 1 0.00 Hydrograph Volume = 27,145 cuft 25 -Yr Developed to SW Hyd. No. 13 -- 25 Yr 0.0 0.1 Hyd No, 13 0.2 0.3 0.3 0.4 0.5 Q (cfs) 28.00 24.00 20.00 16.00 12.00 8.00 4.00 0.00 0.6 Time (hrs) 1 Hydrograph Piot Hydrafiaw'Hydrographs by Intelisove Hyd. No. 14 I25 -Yr Combined to SW Hydrograph type = Combine Storm frequency = 25 yrs 1 Inflow hyds. = 12, 13 1 1 1 Thursday, Oct 26 2006, 5:4 PM Peak discharge Time interval = 53.01 cfs 1 min 25 -Yr Combined to SW Hyd. No. 14 — 25 Yr Hydrograph Volumed 74,209 cuft 1 1 Hyd No. 14 Hyd No. 12 Hyd No. 13 5 I MY drograph Plot 1 Hydraflow Hydragraphs by Intelisolve Hyd. No. 15 25 -Yr SW Pond Hydrograph type Storm frequency Inflow hyd. No. Reservoir name Reservoir 25 yrs 14 = SW Pond Thursday, Oct 26 2006, 5:4 PM Peak discharge Time interval Max. Elevation Max. Storage = 16.42 cfs = 1 min = 5038.98 ft = 47,240 cuft Storage Indication method used. Q (cfs) 60.00 50.00 40.00 30.00 20.00 10.00 Hydrograph Volume = 74,202 cuft 25 -Yr SW Pond Hyd. No. 15-25 Yr 0.00 0.0 0.2 0.3 0.5 Q (cfs) 60.00 50.00 40.00 - 30.00 - 20.00 - 10.00 0.00 0.7 0.8 1.0 1.2 1.3 1.5 1.7 1.8 2.0 2.2 2.3 Time (hrs) Hyd No. 15 Hyd No. 14 6 • • 1 1 1 1 1 1 r 1 1 1 1 1 1 ti 1 1 Pond Report Hydraflow Hydrographs by Intellsolve Pond No. 1 - SW Pond Pond Data Pond storage is based on known contour areas. Average end area method used. Stage ! Storage Table Stage (ft) Elevation (ft) Contour area (sqft) Incr. Storage (cuft) Total storage (cuft) 0.00 5034.60 00 0 0 0.25 5034.75 2,000 250 250 0.50 5035.00 3,650 706 956 1.50 5036.00 4,840 4,245 5,201 2.50 5037.00 11,005 7,923 13,124 3.50 5038.00 17,075 14,040 27,164 4.50 5039.00 24,075 20,575 47,739 5.50 5040.00 32,500 28,288 76,026 Thursday, Oct 26 2006, 5:4 PM Culvert 1 Orifice Structures Weir Structures [A] [8] [C] [D] [A] [g] [C] [D] Rise (in) = 18.00 0.00 0.00 0.00 Crest Len (ft) = 0.00 0.00 0.00 0.00 Span (in) = 18.00 0.00 0.00 0.00 Crest El. (ft) = 0.00 0.00 0.00 0.00 No. Barrels = 1 0 0 0 Weir Coeff. = 3.33 0.00 0.00 0.00 Invert El. (ft) = 5034.50 0.00 0.00 0.00 Weir Type = -- - - - Length (ft) = 45.00 0.00 0.00 0.00 Multi -Stage = No No No No Slope (%) = 1.00 0.00 0.00 0.00 N -Value = .011 .013 .000 .000 Orif. Coeff. = 0.60 0.60 0.00 0.00 Multi -Stage = n/a No No No Exfiltratlon = 0.000 in/hr (Contour) Tailwater Elev. = 0.00 ft Stage (ft) 6.00 5.00 4.00 3.00 2.00 1.00 0.00 Norte: CutverN(hlrtce outflows have been analysed under inlet and outlet control. Stage / Discharge 0.00 2.00 Total Q 4.00 6.00 8.00 10 00 12 00 14 00 1600 1800 Stage (ft) 6.00 5.00 - 4.00 - 3.00 2.00 1.00 0.00 20 00 Discharge (cfs) 1 1 1 1 1 Hydrograph Piot Hydraflow Hydrographs by Intelisolve Hyd. No. 16 25 -Yr Developed to SE Hydrograph type Storm frequency Drainage area Intensity IDF Curve = Rational = 25 yrs = 15.740 ac 3.521 inlhr = ParachuteCO.IDF Thursday, Oct 26 2006, 5:4 PM Peak discharge Time interval Runoff coeff. Tc by User AsclRec limb fact = 21.62 cfs 1 min = 0.39 = 11.00 min = 1/1.67 25 -Yr Developed to SE Hyd. No. 16 — 25 Yr Hydrograph Volume = 19,047 cuft 1 1 1 1 1 1 ti 1 1 Hyd No. 16 Time (hrs) Hydrograph Plot Hydratlaw Hydrographs by Intetisoive Hyd. No. 17 25 -Yr SE Pond Hydrograph type = Reservoir Storm frequency = 25 yrs Inflow hyd. No. = 16 Reservoir name = SE Pond Thursday, Oct 26 2006, 5:4 PM Peak discharge Time interval Max. Elevation Max. Storage = 3.99 cfs = 1 min = 5033.72 ft = 14,04E cuft Storage Indication method used. Q (cfs) 24.00 20.00 16,00 12.00 8.00 1 4.00 - 25 -Yr SE Pond Hyd. No. 17 — 25 Yr Hydrograph Volume = 18,803 cuft 0.00 -----1 0.0 0.2 0.3 0.5 0.7 0.8 1.0 1.2 1.3 1.5 Hyd No. 17 Hyd No. 16 1.7 1.8 2.0 Q (cfs) 24.00 20.00 16.00 - 12.00 8.00 - 4.00 0.00 2.2 2.3 Time (hrs) 9 1 b 1 1 1 1 1 1 t t 11 1 1 1 1 11