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Home My WebLink About20010236.tiff FINAL DRAINAGE REPORT LIGHTHOUSE COVE PHASE H Lot B of RE-2330, Part of the North Half of the Northeast One-Quarter of Section 16, Township 2 North, Range 68 West of the 6th Principal Meridian, Weld County, Colorado Prepared For: Donald G. LaFaver 2185 Pinedrop Lane Golden, CO 80401 Charles D. Miles Jr. 4480 N. 109'° Street Lafayette, CO 80026 Prepared By: TUTTLE APPLEGATE, INC. 11990 Grant Street Suite 304 Denver, CO 80233 September 2000 TA#99-225 pi_ Meg 2001-0236 CERTIFICATION: I hereby certify this Final Drainage Report for Lighthouse Cove Phase II located in Weld County Colorado was prepared by me or under my direct supervision in accordance with the provisions of Weld County Subdivision Ordinance, February 9 1999.omitainttrof\\�oQPpp flE0%e ` .s\MC. p •am9�;'y 871� o /ONM Larry C. Owen, r Pulli n° Registered Professional Engineer State of Colorado No. 29871 1 CERTIFICATION TABLE OF CONTENTS VICINITY MAP I. GENERAL PROJECT INFORMATION A. Location B. Property Description II. FLOOD PLAIN ANALYSIS III. DRAINAGE BASINS AND SUB-BASINS A. Major Basin Descriptions B. Historic Sub-basin Descriptions IV. DRAINAGE DESIGN CRITERIA A. Drainage Criteria B. Development Criteria C. Hydrologic Criteria D. Developed Sub-basins — V. DRAINAGE FACILITY DESIGN VI. CONCLUSIONS REFERENCES BASIN DELINEATION MAP APPENDIX "A" Historic Sub-basins Calculations and Exhibits APPENDIX "B" Developed Sub-basins Calculations and Exhibits POCKET FOLDER Basin Maps 2 I. GENERAL PROJECT INFORMATION A. PROJECT LOCATION - The project is located in Weld County,Colorado, on the southern shore of a lake,which is a part of Lot B of RE-2330, in the North % of the Northeast ''A of Section 16, Township 2 North, Range 68 West of the 6th Principal Meridian. The entrance to the project site is - located approximately 1 mile south of State Highway 119 on Weld County Road 7. B. PROPERTY DESCRIPTION The total area of the project site is 75 acres more or less, of which approximately 61% is a recreational lake and storm water storage facility. The area to be developed as Lighthouse - Cove Phase II is approximately 10.85 acres,and will consist of 8 residential lots(R-1)with a minimum lot size of approximately 0.72 acres. - The project site is a reclaimed sand and gravel pit. The site is currently bordered on the south by agricultural land; on the east by Weld County Road 7; on the west by active gravel mines and on the north by a mix of agricultural and light industrial land uses and an active gravel pit. Idaho Creek runs northeasterly across the project site near the south boundary. Castle Rock Design Group,Inc has completed a detailed subsurface investigation of the site. The soils on the site are described as follows: isolated areas of man-made fill,gravelly,silty sand, natural gravelly, silty sand, and very sandy clay. The soil has been classified in the - hydrologic soils Class D according to the USDA SCS, Soil Survey of Weld County, Colorado, Southern Part. The soils exhibit low to moderate runoff potential and are moderate in susceptibility to erosion. The topography of the site is slightly sloping to the - north—northeast. - II. FLOOD PLAIN ANALYSIS Details on the Idaho Creek flood plain area are contained in the Weld County Flood Hazard — Development Permit FHDP-350. - III. DRAINAGE BASINS AND SUB-BASINS A. MAJOR OFF-SITE BASIN DESCRIPTIONS The project site is located in an area that is tributary to Idaho Creek and St.Vrain Creek. The - site is part of a large historic basin,which is bounded by Idaho Creek and Boulder Creek(See enclosed Basin Delineation Map). Boulder Creek converges with St. Vrain Creek approximately 1 mile north of the site. In general,the historic drainage flows northeasterly — towards Barbour Ponds and into St. Vrain Creek. 3 Tributary flows to the site include both overland runoff from the area to the south as well as flows in Idaho Creek from areas further to the west. It is apparent that portions of the off-site runoff associated with the Idaho Creek basin are historically transported through the southeast portion of the site and exit the site to the east via Idaho Creek. B. HISTORIC ON-SITE BASIN DESCRIPTIONS There are four historic on-site basins that have been identified for this study as Basins A through D. A runoff curve number of 69 was used for the historic on-site basins. This curve number is representative of undeveloped land with a light to moderate grass cover. On-site basins A,B,and C are 0.68 acres, 1.07 acres,and 1.27 acres in size respectively. All three of these basins are located along the southern and eastern shores of the on-site lake and - historically drain into the lake. Basin D is 7.83 acres in size and is located along Idaho Creek as it passes through the southern portion of the site. - A fifth basin, Basin E, is adjacent to but off of the site to the south and east on a piece of property that was previously exempted from the site is 4.67 acres in size. This basin has historically drained onto the site and immediately into Idaho Creek where the runoff is - carried off site to the east. (For complete information regarding areas, concentration times, travel times, etc., see APPENDIX "A" "Historic Sub-Basins", and Sheet 1 of the attached maps) IV. DRAINAGE DESIGN CRITERIA A. DRAINAGE CRITERIA Requirements of the Weld County Subdivision Ordinance(latest edition)have been followed in preparing the design of the storm water management system for Lighthouse Cove Phase B. B. DEVELOPMENT CRITERIA - The storm water management system for this site has been designed so that all runoff from the proposed developed areas of the site would be returned to the respective historic points of discharge. In so doing,any potential impacts that developed storm water runoff might have on either the on-site as well as off-site on surrounding downstream properties will be minimized. C. HYDROLOGIC CRITERIA - The design rainfall events for this project are the 5-year 24-hour and the 100-year 24-hour events. Rainfall depths of 2.8 inches and 5.0 inches have been used for the respective storm events. Technical Release 55 (TR-55) from the United States Department of Agriculture - (USDA), Soils Conservation Service (SCS) has been used to determine all runoff hydrographs for developed and historic land use conditions. 4 D. DEVELOPED SUB-BASINS The site has been subdivided into 12 developed basins designated as Developed Sub-Basins A through L. A curve number of 84 was used for the developed on-site basin area containing residential lots of%2 to 1 acre in size. A curve number of 98 was applied to the proposed paved roadway areas. See Sheet 2 of the attached maps for specific basin locations. The runoff from developed sub-basins will be returned on site to either the lake or to that portion of Idaho Creek, which runs through the property. (For complete information regarding areas, concentration times, travel times, etc., see APPENDIX "B" "Developed Sub-Basins and Sheet 2 of the attached maps) V. DRAINAGE FACILITY DESIGN A. GENERAL CONCEPTS All runoff from developed on-site basins A through C will be retained on site in the existing - lake as is historically done. These three basins account for approximately 18.6% of the developed area and contribute a 100-year developed runoff rate to the lake of approximately 15.5 cfs (see Developed Runoff Table on page 6). If determined necessary, it may be - required that on-site detention facilities be designed as a part of each individual lot's landscape and grading plan in order to detain runoff from each of the lots as they are developed. Basin L runs along an existing irrigation ditch off of Idaho Creek along the east property line of the site. This basin will remain undisturbed during the development of this site,and will continue discharge into the irrigation ditch. _ Developed basins D through K are located along and adjacent to Idaho Creek. Runoff from these basins will be appropriately detained if necessary and subsequently returned to the creek. Developed basins J and K are comprised of the proposed roadway into the site and the proposed shared private driveways to serve the residential lots. The roadway, Shoreline - Drive, will have two different cross-sections; one that consists of two 12-foot driving lanes and one 8-foot parking lane in areas where the road abuts building lots; and a second that consists only of two 12-foot driving lanes where there is no adjacent lot frontage. Both cross - sections will convey storm water runoff to collection points via drivable curb and gutter pans. The shared private driveways should have a cross-section consisting of one 12-foot driving lane with vertical curb and gutter and runoff will be conveyed to Shoreline Drive or to - building site detention areas. Along the length of Idaho Creek, four common driveways are proposed that will cross the creek to provide access from Shoreline Drive to the eight proposed building lots on the south shore of the lake. The existing culvert crossing of Idaho Creek (located in Sub-Basin "I") 5 will be removed upon completion of these four proposed crossings. Idaho Creek flows will - be conveyed through these crossings via a system of culverts. (Details ofthe creek crossings, culvert sizes, and Idaho Creek bank wetland disturbance may be found in FHDP-350 on file with Weld County.) These crossings have been designed as basin boundaries for developed — basins D,F,G, H, and I. Runoff from the 5 and 100-year rainfall events for these sub-basins as well as from sub-basin K have been routed through these crossings along Idaho Creek. The runoff rates are 9.7 cfs and 25.6 cfs, respectively. Based on information contained in - Weld County FHDP-350, the 5-year and 100-year event flow rates on Idaho Creek are 117 cfs and 736 cfs, respectively. The discharge point is at the downstream end of developed basin I at the bridge on Weld County Road 7 over Idaho Creek near the eastern property line of the site. Developed Runoff Table Basin Design Point Area (acres) 5-Year runoff 100-Year (cfs) runoff(cfs) A 1 0.68 1.43 3.51 B 2 1.07 2.26 5.52 C 3 1.27 2.68 6.55 D 4 0.45 0.95 2.32 E 5 4.83 3.92 14.48 F 6 0.72 1.52 3.72 G 7 1.34 2.82 6.92 H 8 1.28 2.70 6.61 I 9 1.91 2.89 7.07 J 10 0.81 3.28 6.09 K 11 1.36 5.51 10.22 L 12 0.55 0.43 1.65 VI. CONCLUSIONS This Final Drainage Report was prepared in accordance with the guidelines set forth in - Section 10: Design Standards of the Weld County Design Criteria in order to insure that the runoff from the proposed development should have no adverse impacts on properties downstream or adjacent to the Lighthouse Cove South Phase H development. REFERENCES 1. Urban Drainage Criteria Manual with latest revisions, Urban Drainage and Flooding Control District, Vol. 1-3 - 2. Weld County Regulations 3. NOAA Precipitation Frequency Atlas 2, Vol. III-Colorado 4. United States Department of Agriculture Soil Conservation Service, Soil Survey of Weld County, Colorado, Southern Part 5. Weld County Flood Hazard Development Permit FHDP-350 6 <-,'j4�k�` R• ; 68 W{c,-- 2./--_ _ --) : „ATE, HWY till 9 — -- -:rt, 4. - = - = = �-, - = >�.�;. c OO w 4- u U Trartrz ST V' 9 ' i48ss .-. ` 1O 4' 9t. n I. T 2 N . < 7b 14 �j fI vw SITE r/,�� /7 .v �•, -, 6870_/ 1h Rmn I 4892 .BM •.. -� 4444. 15 . .y _• "' 487E 16 .1484. ._ ---• C f e8 9. Ltc BM y \ kit M 4882:. - '- 4&82 .__ 9 4940 \ j L I. Pin � oc o'2� 1 �1 L4950-..-.-.,. ` -- .141i .L L2000 1000 0 2000 alIMIIIIIIMIIIIMIll SCALE IN FEET • eL.: 09/11/00 d _-a25 LIGHTHOUSE COVE TuSleApplegate,Inc. Own ws � • __ ,Xo PHASE II i c r.s. MI rw.. ��' 11990 Sell;Ss911 n.GYE: ISO a '..�_� 003...14.Sell; i.: 99225-11C D%C VICINITY MAP '� El, lip adn Pa:lxinlss n» 4�P:IIp.aE.nsNWn.}yk oM: Xt5. R66 W../ ,'.........,..- I a . 9 <,, ., 1 .-'.n'vY '. / .. i _- f r ,-� aJ .35• 95 1 / , � ; Ii STATE HWY 119 1 , h 1 =( {- 1• } y - 1 ' L 4 � _ • -',._,W •IMFA i F _._. ::" 1 • 1 'r SITE; J I .Blo �ICiR•20 112 ",. j� 1 - y„-. �r_ sa l II , ,e ,, ` C.‘ 9 o t ��' ° r 1 ) 777 \ � a en Gn p .y' -4 \ `\ �tl ` 1 �p / 11 / 91 t I f S � •f . .^(.roc t 1 .. _ 21 i - r 23� d1rN L� kP� BSI 1 � : LLi.,z , L . - _ £" . L L4.4:) L - - - HISTORIC SUB-BASIN 3000 1500 0 3000 IIIIIIIe HISTORIC BASIN SCALE IN FEET '—e« Mill/O _ +' LIGHTHOUSE COVE TuttleApplegate,Inc. se vM = 04•41,c +D PHASE II jr — mwrnrd Faun .w and Wader _ _- 11990 Gran Street Suiteb( .e�Farsrl.Deg BASIN DELINEATION AMP O03$8U61i Fn:(303)452-3159 Appendix A ' g I Historic Sub-Basins 8 HISTORIC A Tc Worksheet 3: Time of concentration(Tc)or travel time(Tt) Fect: Lighthouse Cove By: jkd Date: 08/11/2000 Lation: Weld County,Co Checked: jkd Date: 08/11/2000 HISTORIC A Tc.XLS C+dition: Historic C ,ulations for:Tc NOTES: Basin A Sheet Flow(Applicable to Tc only) Segment ID 1 Surface description(table 3-1) light Manning's roughness coeff.,n(table 3-1) 0.015 a. Flow length,L(total L r_300 ft.) ft 47 4. Two-yr 24-hr rainfall,P2 in 2.1 Land slope,s ft/ft 0.0213 Tt=[0.007(nL)"(0.8)]/[P2"(0.5)s^(0.4)] Compute Tt hr 0.02 0.017 S flow concentrated flow Segment ID 2 ,. Surface description(paved or unpaved) light 8. Flow length,L ft 43 :'Watercourse slope,s ft/ft 0.2 1i Average velocity,V(figure 3-1) ft/s 7.22 11. Tt=U(3800 V) Compute TI hr 0.002 0.0021 S1low concentrated flow(continued) Segment ID Surface description(paved or unpaved) 8. Flow length,L ft 9. Watercourse slope,s ft/ft 1( Average velocity,V(figure 3-1) ft/s 1 Tt=U(3600 V) Compute Tt hr 0.0001 C_ nnel flow Segment ID 12. Cross sectional flow area,a ft^2 13. Wetted perimeter,pw ft 1' Hydraulic radius,r=a/pw Compute r fl 1f Channel slope,s ft/ft 16. Manning's roughness coeff.,n 17_V=(1.49 r^(2/3)s^(1/2)yn Compute V ft/s I t Flow length,L ft It Tt=U(3600 V) Compute Tt hr 0.0001 2( Watershed or subarea Tc or Tt(add Tt in steps 6,11,and 19) hr I_ 0.0191 (210-V 1-TR-55,Second Ed.,June 1986) A tmp#15.txt TR-55 Tabular Hydrograph Method Input Summary Description Historic Basin A 5 Rainfall Distribution Type II la/P Interpolation On Total Area 0.6800 ac _ Peak Time 12.1000 hrs Peak Flow 0.5374 cfs Given Input Data: Jbarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) A 0.6800 69 0.1000 0.0000 2.8000 Support Data: Page 1 A5HISTHYDRO.txt TR-55 Tabular Data 5-YEAR HYDROGRAPH .1.0000 hrs 0.0000 cfs 11.3000 hrs 0.0000 cfs —1.6000 hrs 0.0000 cfs 1.9000 hrs 0.0828 cfs 12.0000 hrs 0.3100 cfs 12.1000 hrs 0.5374 cfs 2.2000 hrs 0.3056 cfs .2.3000 hrs 0.1290 cfs 12.4000 hrs 0.1033 cfs —2.5000 hrs 0.0898 cfs 2.6000 hrs 0.0762 cfs 12.7000 hrs 0.0649 cfs 12.8000 hrs 0.0590 cfs 3.0000 hrs 0.0525 cfs .3.2000 hrs 0.0465 cfs 13.4000 hrs 0.0423 cfs `9.6000 hrs 0.0387 cfs 3.8000 hrs 0.0357 cfs 34.0000 hrs 0.0327 cfs 14.3000 hrs 0.0297 cfs t.6000 hrs 0.0285 cfs 1.0000 hrs 0.0261 cfs 15.5000 hrs 0.0236 cfs .0000 hrs 0.0212 cfs 3.5000 hrs 0.0194 cfs ./.0000 hrs 0.0188 cfs 17.5000 hrs 0.0176 cfs —4.0000 hrs 0.0169 cfs '.0000 hrs 0.0150 cfs 20.0000 hrs 0.0126 cfs 29.0000 hrs 0.0120 cfs 1.0000 hrs 0.0000 cfs Total Flow Values "—.0000 hrs 0.0000 cfs .3000 hrs 0.0000 cfs 11.6000 hrs 0.0000 cfs 11.9000 hrs 0.0828 cfs .0000 hrs 0.3100 cfs _.1000 hrs 0.5374 cfs 12.2000 hrs 0.3056 cfs ".3000 hrs 0.1290 cfs .4000 hrs 0.1033 cfs 12.5000 hrs 0.0898 cfs 12.6000 hrs 0.0762 cfs .7000 hrs 0.0649 cfs _.8000 hrs 0.0590 cfs 13.0000 hrs 0.0525 cfs "-'.2000 hrs 0.0465 cfs .4000 hrs 0.0423 cfs Page 1 A5HISTHYDRO.txt 1.6000 hrs 0.0387 cfs 13.8000 hrs 0.0357 cfs -.0000 hrs 0.0327 cfs • .3000 hrs 0.0297 cfs l.t.6000 hrs 0.0285 cfs 15.0000 hrs 0.0261 cfs —. 5000 hrs 0.0236 cfs .0000 hrs 0.0212 cfs 16.5000 hrs 0.0194 cfs -.0000 hrs 0.0188 cfs ' .5000 hrs 0.0176 cfs 1 .0000 hrs 0.0169 cfs 19.0000 hrs 0.0150 cfs 0000 hrs 0.0126 cfs .0000 hrs 0.0120 cfs 26.0000 hrs 0.0000 cfs Peak Time and Flow ',_.1000 hrs 0.5374 cfs Page 2 tmp#15.txt TR-55 Tabular Hydrograph Method Input Summary Description Historic Basin A 100 _ Rainfall Distribution Type II la/P Interpolation On Total Area 0.6800 ac — Peak Time 12.1000 hrs Peak Flow 2.0391 cfs Given Input Data: Jbarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) A 0.6800 69 0.1000 0.0000 5.0000 Support Data: Page 1 A100HISTHYDRO.txt TR-55 Tabular Data 100-YEAR HISTORICAL HYDROGRAPH 1.0000 hrs 0.0300 cfs 11.3000 hrs 0.0425 cfs .6000 hrs 0.0663 cfs .9000 hrs 0.5454 cfs 12.0000 hrs 1.2801 cfs 12.1000 hrs 2.0391 cfs '..2000 hrs 1.2198 cfs .2.3000 hrs 0.4513 cfs 12.4000 hrs 0.3264 cfs `'.5000 hrs 0.2774 cfs '.6000 hrs 0.2345 cfs 12.7000 hrs 0.1963 cfs 12.8000 hrs 0.1755 cfs .0000 hrs 0.1538 cfs hrs 0.1343 cfs 13.4000 hrs 0.1210 cfs '1.6000 hrs 0.1098 cfs .8000 hrs 0.1006 cfs 14.0000 hrs 0.0915 cfs 14.3000 hrs 0.0823 cfs .6000 hrs 0.0782 cfs ' .0000 hrs 0.0711 cfs 15.5000 hrs 0.0640 cfs ta.0000 hrs 0.0570 cfs .5000 hrs 0.0520 cfs 1 r.0000 hrs 0.0499 cfs 17.5000 hrs 0.0470 cfs ' .0000 hrs 0.0449 cfs .0000 hrs 0.0387 cfs 20.0000 hrs 0.0328 cfs 22.0000 hrs 0.0308 cfs .0000 hrs 0.0000 cfs Total Flow Values 1—.0000 hrs 0.0300 cfs 1 .3000 hrs 0.0425 cfs 11.6000 hrs 0.0663 cfs 1-1-.9000 hrs 0.5454 cfs 1 .0000 hrs 1.2801 cfs 1.1000 hrs 2.0391 cfs 12.2000 hrs 1.2198 cfs 1—.3000 hrs 0.4513 cfs 1 4000 hrs 0.3264 cfs 12.5000 hrs 0.2774 cfs 12.6000 hrs 0.2345 cfs 1 .7000 hrs 0.1963 cfs 1_.8000 hrs 0.1755 cfs 13.0000 hrs 0.1538 cfs 1.2000 hrs 0.1343 cfs 1 4000 hrs 0.1210 cfs Page 1 A100HISTHYDRO.txt .3.6000 hrs 0.1098 cfs 13.8000 hrs 0.1006 cfs -`4.0000 hrs 0.0915 cfs 4.3000 hrs 0.0823 cfs 14.6000 hrs 0.0782 cfs 15.0000 hrs 0.0711 cfs 5.5000 hrs 0.0640 cfs 6.0000 hrs 0.0570 cfs 16.5000 hrs 0.0520 cfs 37.0000 hrs 0.0499 cfs 7.5000 hrs 0.0470 cfs 8.0000 hrs 0.0449 cfs 19.0000 hrs 0.0387 cfs 0.0000 hrs 0.0328 cfs 2.0000 hrs 0.0308 cfs 26.0000 hrs 0.0000 cfs Peak Time and Flow .2.1000 hrs 2.0391 cfs Page 2 HISTORIC Tc Worksheet 3: Time of concentration(Tc)or travel time(Tt) )ject: Lighthouse Cove By: jkd Date: 08/11/2000 Location: Weld County,Co Checked: jkd Date: 08/11/2000 HISTORIC Tc.XLS —edition: Historic Iculations for:Tc NOTES: Basin B Sheet Flow(Applicable to Tc only) Segment ID 1 — Surface description(table 3-1) light Manning's roughness coeff.,n(table 3-1) 0.015 3. Flow length,L(total L<=300 ft.) ft 107.2 4. Two-yr 24-hr rainfall,P2 in 2.1 Land slope,s ft/ft 0.0121 Tt=[0.007(nL)^(0.8)]/IP2^(0.5)s^(0.4)] Compute Tt hr 0.04 0.041 allow concentrated flow Segment ID 2 /. Surface description(paved or unpaved) light 8. Flow length,L ft 22 - Watercourse slope,s ft/ft 0.27 ' Average velocity,V(figure 3-1) ft/s 8.38 11. Tt=U(3600 V) Compute Tt hr 0.001 0.0011 allow concentrated flow(continued) Segment ID Surface description(paved or unpaved) 8. Flow length,L ft S Watercourse slope.s ft/ft 1 Average velocity,V(figure 3-1) ft/s 1 Tt=U(3600 V) Compute Tt hr 0.0001 ( annel flow Segment ID 12. Cross sectional flow area,a 11^2 1 Wetted perimeter,pw ft 1 Hydraulic radius,r=a/pw Computer ft 1 Channel slope.s ft/ft 16. Manning's roughness coeff.,n 1.2-V=(1.49 rA(2/3)s^(1/2))/n Compute V fl/s 1 Flow length,L ft 1.,. Tt=U(3600 V) Compute Tt hr 0.0001 2 Watershed or subarea Tc or Tt(add Tt in steps 6,11,and 19) hrl 0.04211 (210-V I-TR-55,Second Ed.,June 1986) B tmp#15.txt TR-55 Tabular Hydrograph Method Input Summary Description Historic Basin B 5 _Rainfall Distribution Type II la/P Interpolation On Total Area 1.0700 ac —Peak Time 12.1000 hrs Peak Flow 0.8456 cfs Given Input Data: barea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) B 1.0700 69 0.1000 0.0000 2.8000 Support Data: Page 1 tmp#15.txt TR-55 Tabular Data 5-YEAR HYDROGRAPH 11.0000 hrs 0.0000 cfs 11.3000 hrs 0.0000 cfs 1.6000 hrs 0.0000 cfs 1.9000 hrs 0.1304 cfs 12.0000 hrs 0.4877 cfs 12.1000 hrs 0.8456 cfs 2.2000 hrs 0.4808 cfs .2.3000 hrs 0.2031 cfs 12.4000 hrs 0.1625 cfs -2.5000 hrs 0.1413 cfs 2.6000 hrs 0.1199 cfs 12.7000 hrs 0.1021 cfs 12.8000 hrs 0.0928 cfs 3.0000 hrs 0.0826 cfs .3.2000 hrs 0.0731 cfs 13.4000 hrs 0.0666 cfs '3.6000 hrs 0.0609 cfs 3.8000 hrs 0.0562 cfs 14.0000 hrs 0.0515 cfs 14.3000 hrs 0.0467 cfs 1.6000 hrs 0.0448 cfs 5.0000 hrs 0.0411 cfs 15.5000 hrs 0.0372 cfs M.0000 hrs 0.0333 cfs 5.5000 hrs 0.0305 cfs i/.0000 hrs 0.0295 cfs 17.5000 hrs 0.0277 cfs L0000 hrs 0.0266 cfs ).0000 hrs 0.0237 cfs 20.0000 hrs 0.0199 cfs Q0000 hrs 0.0189 cfs L0000 hrs 0.0000 cfs Total Flow Values .0000 hrs 0.0000 cfs .3000 hrs 0.0000 cfs 11.6000 hrs 0.0000 cfs v.9000 hrs 0.1304 cfs !.0000 hrs 0.4877 cfs .2.1000 hrs 0.8456 cfs 12.2000 hrs 0.4808 cfs ^!.3000 hrs 0.2031 cfs !.4000 hrs 0.1625 cfs 12.5000 hrs 0.1413 cfs 12.6000 hrs 0.1199 cfs !.7000 hrs 0.1021 cfs .2.8000 hrs 0.0928 cfs 13.0000 hrs 0.0826 cfs `1.2000 hrs 0.0731 cfs L4000 hrs 0.0666 cfs Page 1 tmp#15.txt 13.6000 hrs 0.0609 cfs 13.8000 hrs 0.0562 cfs - 14.0000 hrs 0.0515 cfs 14.3000 hrs 0.0467 cfs 14.6000 hrs 0.0448 cfs _ 15.0000 hrs 0.0411 cfs 15.5000 hrs 0.0372 cfs 16.0000 hrs 0.0333 cfs 16.5000 hrs 0.0305 cfs - 17.0000 hrs 0.0295 cfs 17.5000 hrs 0.0277 cfs 18.0000 hrs 0.0266 cfs 19.0000 hrs 0.0237 cfs - 20.0000 hrs 0.0199 cfs 22.0000 hrs 0.0189 cfs 26.0000 hrs 0.0000 cfs Peak Time and Flow 12.1000 hrs 0.8456 cfs Page 2 tmp#15.txt TR-55 Tabular Hydrograph Method Input Summary Description Historic Basin B 100 _ Rainfall Distribution Type II la/P Interpolation On Total Area 1.0700 ac — Peak Time 12.1000 hrs Peak Flow 3.2087 cfs Given Input Data: ubarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) B 1.0700 69 0.1000 0.0000 5.0000 Support Data: Page 1 B100HISTHYDRO.txt ISTHYD RO.txt TR-55 Tabular Data 100-YEAR HYDROGRAPH 1.0000 hrs 0.0472 cfs 11.3000 hrs 0.0669 cfs 7.6000 hrs 0.1043 cfs 1.9000 hrs 0.8582 cfs 12.0000 hrs 2.0142 cfs 12.1000 hrs 3.2087 cfs !.2000 hrs 1.9195 cfs .2.3000 hrs 0.7101 cfs 12.4000 hrs 0.5137 cfs 'i.5000 hrs 0.4364 cfs !.6000 hrs 0.3690 cfs 12.7000 hrs 0.3088 cfs 12.8000 hrs 0.2761 cfs 1.0000 hrs 0.2421 cfs .2000 hrs 0.2113 cfs 13.4000 hrs 0.1904 cfs t',.6000 hrs 0.1727 cfs .8000 hrs 0.1583 cfs iw.0000 hrs 0.1439 cfs 14.3000 hrs 0.1295 cfs .6000 hrs 0.1230 cfs .0000 hrs 0.1119 cfs 15.5000 hrs 0.1007 cfs 'A.0000 hrs 0.0896 cfs .5000 hrs 0.0818 cfs .0000 hrs 0.0785 cfs 17.5000 hrs 0.0739 cfs .0000 hrs 0.0706 cfs ' .0000 hrs 0.0608 cfs 20.0000 hrs 0.0517 cfs 22.0000 hrs 0.0484 cfs .0000 hrs 0.0000 cfs Total Flow Values ".0000 hrs 0.0472 cfs 1 .3000 hrs 0.0669 cfs 11.6000 hrs 0.1043 cfs 11.9000 hrs 0.8582 cfs 1 .0000 hrs 2.0142 cfs 1_1000 hrs 3.2087 cfs 12.2000 hrs 1.9195 cfs `.3000 hrs 0.7101 cfs .4000 hrs 0.5137 cfs 12.5000 hrs 0.4364 cfs 12.6000 hrs 0.3690 cfs 1 .7000 hrs 0.3088 cfs 1 .8000 hrs 0.2761 cfs 13.0000 hrs 0.2421 cfs t -.2000 hrs 0.2113 cfs 1 .4000 hrs 0.1904 cfs Page 1 B100HISTHYDRO.txt STHYDRO.txt 3.6000 hrs 0.1727 cfs 13.8000 hrs 0.1583 cfs _I 4.0000 hrs 0.1439 cfs 4.3000 hrs 0.1295 cfs .4.6000 hrs 0.1230 cfs 15.0000 hrs 0.1119 cfs -'5.5000 hrs 0.1007 cfs 6.0000 hrs 0.0896 cfs 16.5000 hrs 0.0818 cfs _17.0000 hrs 0.0785 cfs 7.5000 hrs 0.0739 cfs .8.0000 hrs 0.0706 cfs 19.0000 hrs 0.0608 cfs 0.0000 hrs 0.0517 cfs 2.0000 hrs 0.0484 cfs z6.0000 hrs 0.0000 cfs Peak Time and Flow 2.1000 hrs 3.2087 cfs Page 2 HISTORIC Tc Worksheet 3: Time of concentration(Tc)or travel time(Tt) Project: Lighthouse Cove By:jkd Date: 08/11/2000 Location: Weld County,Co Checked:jkd Date: 08/11/2000 HISTORIC A Tc.XLS — Condition: Historic Calculations for:Tc NOTES: Basin C Sheet Flow(Applicable to Tc only) Segment ID 1 — 1. Surface description(table 3-1) light 2. Manning's roughness coeff.,n(table 3-1) 0.015 3. Flow length,L(total L<=300 ft.) ft 66.9 4. Two-yr24-hr rainfall,P2 in 2.1 - 5. Land slope,s ft/ft 0.0190 6. Tt=(0.007(nL)"(0.8)1/LP2A(0.5)s"(0.4)] Compute Tt hr 0.02 0.024 Shallow concentrated flow Segment ID 2 7. Surface description(paved or unpaved) light 8. Flow length,L ft 37 — 9. Watercourse slope,s ft/ft 0.162 10. Average velocity,V(figure 3-1) ft/s 6.49 11. Tt=LJ(3800 V) Compute Tt hr 0.002 0.0021 — Shallow concentrated flow(continued) Segment ID 7. Surface description(paved or unpaved) 8. Flow length,L ft 9. Watercourse slope,s ft/ft - 10. Average velocity,V(figure 3-1) ft/s 11. Tt=LI(3600 V) Compute Tt hr o.000l Channel flow Segment ID 12. Cross sectional flow area,a ft"2 13. Wetted perimeter,pw ft - 14. Hydraulic radius,r=a/pw Compute r ft 15. Channel slope,s fl/ft 16. Manning's roughness coeff.,n 17. V=(1.49 P(2/3)s11/2))/n Compute V ft/s 18. Flow length,L ft 19. Tt=LI(3600 V) Compute Tt hr o.000l - 20. Watershed or subarea Tc or Tt(add Tt in steps 6, 11,and 19) hrL. _ 0.02 (210-V I-TR-55,Second Ed.,June 1986) C tmp#15.txt TR-55 Tabular Hydrograph Method Input Summary Description Historic Basin C 5 Rainfall Distribution Type II la/P Interpolation On Total Area 1.2700 ac Peak Time 12.1000 hrs Peak Flow 1.0037 cfs Given Input Data: Subarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) C 1.2700 69 0.1000 0.0000 2.8000 Support Data: Page 1 tmp#15.txt TR-55 Tabular Data - 5-YEAR HYDROGRAPH .1.0000 hrs 0.0000 cfs 11.3000 hrs 0.0000 cfs -1.6000 hrs 0.0000 cfs 1.9000 hrs 0.1547 cfs 12.0000 hrs 0.5789 cfs • _12.1000 hrs 1.0037 cfs 2.2000 hrs 0.5707 cfs .2.3000 hrs 0.2410 cfs 12.4000 hrs 0.1929 cfs -`2.5000 hrs 0.1678 cfs 2.6000 hrs 0.1423 cfs 12.7000 hrs 0.1212 cfs 12.8000 hrs 0.1101 cfs 3.0000 hrs 0.0980 cfs 3.2000 hrs 0.0868 cfs 13.4000 hrs 0.0791 cfs x3.6000 hrs 0.0723 cfs 3.8000 hrs 0.0667 cfs 4.0000 hrs 0.0611 cfs 14.3000 hrs 0.0554 cfs 4.6000 hrs 0.0531 cfs 5.0000 hrs 0.0488 cfs 15.5000 hrs 0.0442 cfs -16.0000 hrs 0.0396 cfs 6.5000 hrs 0.0362 cfs .7.0000 hrs 0.0351 cfs 17.5000 hrs 0.0328 cfs -8.0000 hrs 0.0316 cfs 9.0000 hrs 0.0281 cfs 20.0000 hrs 0.0236 cfs 22.0000 hrs 0.0224 cfs 6.0000 hrs 0.0000 cfs Total Flow Values ''1.0000 hrs 0.0000 cfs 1.3000 hrs 0.0000 cfs 11.6000 hrs 0.0000 cfs 11.9000 hrs 0.1547 cfs 2.0000 hrs 0.5789 cfs 2.1000 hrs 1.0037 cfs 12.2000 hrs 0.5707 cfs 12.3000 hrs 0.2410 cfs 2.4000 hrs 0.1929 cfs i2.5000 hrs 0.1678 cfs 12.6000 hrs 0.1423 cfs 2.7000 hrs 0.1212 cfs 2.8000 hrs 0.1101 cfs 13.0000 hrs 0.0980 cfs 13.2000 hrs 0.0868 cfs 3.4000 hrs 0.0791 cfs Page 1 tmp#15.txt 13.6000 hrs 0.0723 cfs 13.8000 hrs 0.0667 cfs - 14.0000 hrs 0.0611 cfs 14.3000 hrs 0.0554 cfs 14.6000 hrs 0.0531 cfs 15.0000 hrs 0.0488 cfs - 15.5000 hrs 0.0442 cfs 16.0000 hrs 0.0396 cfs 16.5000 hrs 0.0362 cfs 17.0000 hrs 0.0351 cfs 17.5000 hrs 0.0328 cfs 18.0000 hrs 0.0316 cfs 19.0000 hrs 0.0281 cfs - 20.0000 hrs 0.0236 cfs 22.0000 hrs 0.0224 cfs 26.0000 hrs 0.0000 cfs Peak Time and Flow 12.1000 hrs 1.0037 cfs Page 2 tmp#15.txt TR-55 Tabular Hydrograph Method Input Summary Description Historic Basin C 100 Rainfall Distribution Type II la/P Interpolation On Total Area 1.2700 ac Peak Time 12.1000 hrs Peak Flow 3.8084 cfs Given Input Data: Subarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) C 1.2700 69 0.1000 0.0000 5.0000 Support Data: Page 1 tmp#15.txt TR-55 Tabular Data C 100-YEAR HYDROGRAPH 11.0000 hrs 0.0561 cfs 11.3000 hrs 0.0794 cfs — 11.6000 hrs 0.1238 cfs 11.9000 hrs 1.0187 cfs 12.0000 hrs 2.3907 cfs 12.1000 hrs 3.8084 cfs 12.2000 hrs 2.2782 cfs 12.3000 hrs 0.8429 cfs 12.4000 hrs 0.6097 cfs — 12.5000 hrs 0.5180 cfs 12.6000 hrs 0.4380 cfs 12.7000 hrs 0.3665 cfs _ 12.8000 hrs 0.3277 cfs 13.0000 hrs 0.2873 cfs 13.2000 hrs 0.2508 cfs 13.4000 hrs 0.2260 cfs — 13.6000 hrs 0.2050 cfs 13.8000 hrs 0.1879 cfs 14.0000 hrs 0.1708 cfs 14.3000 hrs 0.1537 cfs — 14.6000 hrs 0.1460 cfs 15.0000 hrs 0.1328 cfs 15.5000 hrs 0.1196 cfs - 16.0000 hrs 0.1064 cfs 16.5000 hrs 0.0970 cfs 17.0000 hrs 0.0932 cfs 17.5000 hrs 0.0877 cfs 18.0000 hrs 0.0838 cfs 19.0000 hrs 0.0722 cfs 20.0000 hrs 0.0613 cfs 22.0000 hrs 0.0574 cfs 26.0000 hrs 0.0000 cfs Total Flow Values — 11.0000 hrs 0.0561 cfs 11.3000 hrs 0.0794 cfs 11.6000 hrs 0.1238 cfs _ 11.9000 hrs 1.0187 cfs 12.0000 hrs 2.3907 cfs 12.1000 hrs 3.8084 cfs 12.2000 hrs 2.2782 cfs — 12.3000 hrs 0.8429 cfs 12.4000 hrs 0.6097 cfs 12.5000 hrs 0.5180 cfs 12.6000 hrs 0.4380 cfs — 12.7000 hrs 0.3665 cfs 12.8000 hrs 0.3277 cfs 13.0000 hrs 0.2873 cfs — 13.2000 hrs 0.2508 cfs 13.4000 hrs 0.2260 cfs Page 1 tmp#15.txt 13.6000 hrs 0.2050 cfs 13.8000 hrs 0.1879 cfs _ 14.0000 hrs 0.1708 cfs 14.3000 hrs 0.1537 cfs 14.6000 hrs 0.1460 cfs 15.0000 hrs 0.1328 cfs - 15.5000 hrs 0.1196 cfs 16.0000 hrs 0.1064 cfs 16.5000 hrs 0.0970 cfs - 17.0000 hrs 0.0932 cfs 17.5000 hrs 0.0877 cfs 18.0000 hrs 0.0838 cfs 19.0000 hrs 0.0722 cfs - 20.0000 hrs 0.0613 cfs 22.0000 hrs 0.0574 cfs 26.0000 hrs 0.0000 cfs Peak Time and Flow 12.1000 hrs 3.8084 cfs Page 2 HISTORIC Tc Worksheet 3:Time of concentration(Tc)or travel time(Tt) Project: Lighthouse Cove By: jkd Date: 08/11/2000 Location: Weld County,Co Checked: jkd Date: 08/11/2000 HISTORIC A Tc.XLS - Condition: Historic Calculations for:Tc NOTES: Basin D Sheet Flow(Applicable to Tc only) Segment ID 1 - 1. Surface description(table 3-1) light 2. Manning's roughness coeff.,n(table 3-1) 0.015 3. Flow length,L(total L<=300 ft.) ft 257.65 4. Two-yr 24-hr rainfall,P2 in 2.1 - 5. Land slope,s ft/ft 0.0116 6. Tt=(0.007(nL)A(0.8)]/(P2A(0.5)sA(0.4)1 Compute Tt hr 0.08 0.085 Shallow concentrated flow Segment ID 2 7. Surface description(paved or unpaved) light 8. Flow length,L ft 37 - 9. Watercourse slope,s ft/ft 0.231 10. Average velocity,V(figure 3-1) ft/s 7.75 11. Tt=L/(3600 V) Compute Tt hr 0.001 0.0011 - Shallow concentrated flow(continued) Segment ID 7. Surface description(paved or unpaved) 8. Flow length,L ft 9. Watercourse slope,s ft/ft - 10. Average velocity,V(figure 3-1) tt/s 11. Tt=L/(3600 V) Compute Tt hr 0.0001 Channel flow Segment ID 3.00 12. Cross sectional flow area,a ft^2 7.58 13. Wetted perimeter,pw ft 10.54 - 14. Hydraulic radius,r=a/pw Computer ft 0.72 15. Channel slope,s ft/ft 0.0014 16. Manning's roughness coeff.,n 0.04 17. V=(1.49 0(2/3)sA(1/2))/n Compute V ft/s 1.28 18. Flow length,L ft 2008 19. Tt=IJ(3600 V) Compute Tt hr 0.44 0.4371 - 20. Watershed or subarea Tc or Tt(add Tt in steps 6,11,and 19) hrL 0.524 (210-V 1-TR-55,Second Ed.,June 1986) D Idaho Creek.txt Historic Idaho Creek channel Channel Calculator -Given Input Data: Shape Trapezoidal Solving for Flowrate — Slope 0.0014 ft/ft Manning's n 0.0350 Depth 18.0000 in _ Height 22.0000 in Bottom width 0.1000 in Left slope 0.2570 ft/ft(V/H) Right slope 0.3529 ft/ft (V/H) Computed Results: Flowrate 9.6599 cfs Velocity 1.2748 fps Full Flowrate 16.4891 cfs Flow area 7.5778 ft2 Flow perimeter 126.5038 in — Hydraulic radius 8.6259 in Top width 121.1449 in Area 11.3165 ft2 _ Perimeter 154.5935 in Percent full 81.8182 % Critical Information - Critical depth 10.4858 in Critical slope 0.0249 ft/ft Critical velocity 3.7519 fps Critical area 2.5746 ft2 - Critical perimeter 73.7360 in Critical hydraulic radius 5.0280 in Critical top width 70.6142 in _ Specific energy 1.5253 ft Minimum energy 1.3107 ft Froude number 0.2594 Flow condition Subcritical Page 1 tmp#15.txt TR-55 Tabular Hydrograph Method Input Summary Description Historic Basin D 5 Rainfall Distribution Type II — la/P Interpolation On Total Area 7.8300 ac _ Peak Time 12.1000 hrs Peak Flow 6.1879 cfs Given Input Data: Subarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) D 7.8300 69 0.1000 0.0000 2.8000 Support Data: Page 1 tmp#15.txt TR-55 Tabular Data D 5-YEAR HYDROGRAPH 11.0000 hrs 0.0000 cfs 11.3000 hrs 0.0000 cfs — 11.6000 hrs 0.0000 cfs 11.9000 hrs 0.9539 cfs 12.0000 hrs 3.5691 cfs - 12.1000 hrs 6.1879 cfs 12.2000 hrs 3.5186 cfs 12.3000 hrs 1.4860 cfs 12.4000 hrs 1.1891 cfs — 12.5000 hrs 1.0344 cfs 12.6000 hrs 0.8774 cfs 12.7000 hrs 0.7474 cfs _ 12.8000 hrs 0.6790 cfs 13.0000 hrs 0.6043 cfs 13.2000 hrs 0.5352 cfs 13.4000 hrs 0.4875 cfs — 13.6000 hrs 0.4459 cfs 13.8000 hrs 0.4114 cfs 14.0000 hrs 0.3768 cfs 14.3000 hrs 0.3415 cfs — 14.6000 hrs 0.3276 cfs 15.0000 hrs 0.3007 cfs 15.5000 hrs 0.2723 cfs — 16.0000 hrs 0.2439 cfs 16.5000 hrs 0.2231 cfs 17.0000 hrs 0.2162 cfs 17.5000 hrs 0.2024 cfs — 18.0000 hrs 0.1947 cfs 19.0000 hrs 0.1733 cfs 20.0000 hrs 0.1456 cfs - 22.0000 hrs 0.1379 cfs 26.0000 hrs 0.0000 cfs Total Flow Values — 11.0000 hrs 0.0000 cfs 11.3000 hrs 0.0000 cfs 11.6000 hrs 0.0000 cfs - 11.9000 hrs 0.9539 cfs 12.0000 hrs 3.5691 cfs 12.1000 hrs 6.1879 cfs 12.2000 hrs 3.5186 cfs — 12.3000 hrs 1.4860 cfs 12.4000 hrs 1.1891 cfs 12.5000 hrs 1.0344 cfs _ 12.6000 hrs 0.8774 cfs 12.7000 hrs 0.7474 cfs 12.8000 hrs 0.6790 cfs 13.0000 hrs 0.6043 cfs — 13.2000 hrs 0.5352 cfs 13.4000 hrs 0.4875 cfs Page 1 tmp#15.txt 13.6000 hrs 0.4459 cfs 13.8000 hrs 0.4114 cfs - 14.0000 hrs 0.3768 cfs 14.3000 hrs 0.3415 cfs 14.6000 hrs 0.3276 cfs 15.0000 hrs 0.3007 cfs - 15.5000 hrs 0.2723 cfs 16.0000 hrs 0.2439 cfs 16.5000 hrs 0.2231 cfs _ 17.0000 hrs 0.2162 cfs 17.5000 hrs 0.2024 cfs 18.0000 hrs 0.1947 cfs 19.0000 hrs 0.1733 cfs - 20.0000 hrs 0.1456 cfs 22.0000 hrs 0.1379 cfs 26.0000 hrs 0.0000 cfs Peak Time and Flow 12.1000 hrs 6.1879 cfs Page 2 tmp#15.txt TR-55 Tabular Hydrograph Method Input Summary Description Historic Basin D 100 Rainfall Distribution Type II la/P Interpolation On Total Area 7.8300 ac Peak Time 12.1000 hrs Peak Flow 23.4802 cfs Given Input Data: Subarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) D 7.8300 69 0.1000 0.0000 5.0000 Support Data: Page 1 tmp#15.txt TR-55 Tabular Data D 100-YEAR HYDROGRAPH 11.0000 hrs 0.3457 cfs 11.3000 hrs 0.4897 cfs — 11.6000 hrs 0.7634 cfs 11.9000 hrs 6.2804 cfs 12.0000 hrs 14.7397 cfs - 12.1000 hrs 23.4802 cfs 12.2000 hrs 14.0461 cfs 12.3000 hrs 5.1965 cfs 12.4000 hrs 3.7588 cfs — 12.5000 hrs 3.1936 cfs 12.6000 hrs 2.7005 cfs 12.7000 hrs 2.2599 cfs 12.8000 hrs 2.0204 cfs 13.0000 hrs 1.7714 cfs 13.2000 hrs 1.5463 cfs 13.4000 hrs 1.3931 cfs — 13.6000 hrs 1.2638 cfs 13.8000 hrs 1.1585 cfs 14.0000 hrs 1.0531 cfs 14.3000 hrs 0.9478 cfs — 14.6000 hrs 0.8999 cfs 15.0000 hrs 0.8185 cfs 15.5000 hrs 0.7372 cfs — 16.0000 hrs 0.6558 cfs 16.5000 hrs 0.5983 cfs 17.0000 hrs 0.5744 cfs 17.5000 hrs 0.5409 cfs — 18.0000 hrs 0.5169 cfs 19.0000 hrs 0.4451 cfs 20.0000 hrs 0.3781 cfs — 22.0000 hrs 0.3542 cfs 26.0000 hrs 0.0000 cfs Total Flow Values — 11.0000 hrs 0.3457 cfs 11.3000 hrs 0.4897 cfs 11.6000 hrs 0.7634 cfs _ 11.9000 hrs 6.2804 cfs 12.0000 hrs 14.7397 cfs 12.1000 hrs 23.4802 cfs 12.2000 hrs 14.0461 cfs — 12.3000 hrs 5.1965 cfs 12.4000 hrs 3.7588 cfs 12.5000 hrs 3.1936 cfs — 12.6000 hrs 2.7005 cfs 12.7000 hrs 2.2599 cfs 12.8000 hrs 2.0204 cfs 13.0000 hrs 1.7714 cfs — 13.2000 hrs 1.5463 cfs 13.4000 hrs 1.3931 cfs Page 1 tmp#15.txt 13.6000 hrs 1.2638 cfs 13.8000 hrs 1.1585 cfs _14.0000 hrs 1.0531 cfs 14.3000 hrs 0.9478 cfs 14.6000 hrs 0.8999 cfs 15.0000 hrs 0.8185 cfs -15.5000 hrs 0.7372 cfs 16.0000 hrs 0.6558 cfs 16.5000 hrs 0.5983 cfs _17.0000 hrs 0.5744 cfs 17.5000 hrs 0.5409 cfs 18.0000 hrs 0.5169 cfs 19.0000 hrs 0.4451 cfs -20.0000 hrs 0.3781 cfs 22.0000 hrs 0.3542 cfs 26.0000 hrs 0.0000 cfs Peak Time and Flow 12.1000 hrs 23.4802 cfs Page 2 HISTORIC Tc Worksheet 3:Time of concentration(Tc)or travel time(Tt) Project: Lighthouse Cove By:jkd Date: 08/11/2000 Location: Weld County,Co Checked:jkd Date: 08/11/2000 HISTORIC A Tc.XLS — Condition: Historic Calculations for:Tc NOTES: Basin E Sheet Flow(Applicable to Tc only) Segment ID 1 — 1. Surface description(table 3-1) light 2. Manning's roughness coeff.,n(table 3-1) 0.015 3. Flow length,L(total L<=300 ft.) ft 397 4. Two-yr 24-hr rainfall,P2 in 2.1 - 5. Land slope,s ft/ft 0.0050 6. Tt=10.007(nL)"(0.8)]/[P2"(0.5)s"(0.4)] Compute Tt hr 0.17 0.168 Shallow concentrated flow Segment ID 7. Surface description(paved or unpaved) 8. Flow length,L ft — 9. Watercourse slope,s ft/ft 10. Average velocity,V(figure 3-1) ft/s 11. Tt=L/(3600 V) Compute Tt hr 0.0001 —Shallow concentrated flow(continued) Segment ID 7. Surface description(paved or unpaved) 8. Flow length,L ft 9. Watercourse slope,s fVft 10. Average velocity,V(figure 3-1) ft/s 11. Tt=L/(3600 V) Compute Tt hr o.000l Channel flow Segment ID 12. Cross sectional flow area,a ft^2 13. Wetted perimeter,pw ft 14. Hydraulic radius,r=a/pw Computer ft 15. Channel slope,s ft/ft 16. Manning's roughness coeff.,n 17. V=(1.49 r"(2/3)s"(1/2))/n Compute V ft/s 18. Flow length,L ft 19. Tt=L/(3600 V) Compute Tt hr 0.0001 20. Watershed or subarea Tc or Tt(add Tt in steps 6,11,and 19) 0.168 (210-V I-TR-55,Second Ed.,June 1986) E tmp#15.txt TR-55 Tabular Hydrograph Method Input Summary Description Basin E historical 5-year Rainfall Distribution Type II la/P Interpolation On Total Area 0.0073 mi2 Peak Time 12.2000 hrs Peak Flow 2.7213 cfs Given Input Data: Subarea D/S Subareas Area CN Tc Tt Rainfall Description (mi2) (hrs) (hrs) (in) E 0.0073 69 0.1680 0.0000 2.8000 Support Data: Messages: Info: Time of Concentration rounded to 0.2000 hrs in row<1>. Page 1 tmp#15.txt TR-55 Tabular Data BASIN E 5-YEAR HYDROGRAPH 11.0000 hrs 0.0000 cfs 11.3000 hrs 0.0000 cfs — 11.6000 hrs 0.0000 cfs 11.9000 hrs 0.1434 cfs 12.0000 hrs 0.6647 cfs — 12.1000 hrs 2.0454 cfs 12.2000 hrs 2.7213 cfs 12.3000 hrs 1.9651 cfs 12.4000 hrs 1.1094 cfs — 12.5000 hrs 0.8059 cfs 12.6000 hrs 0.6486 cfs 12.7000 hrs 0.5367 cfs - 12.8000 hrs 0.4558 cfs 13.0000 hrs 0.3865 cfs 13.2000 hrs 0.3381 cfs 13.4000 hrs 0.3052 cfs — 13.6000 hrs 0.2806 cfs 13.8000 hrs 0.2560 cfs 14.0000 hrs 0.2355 cfs 14.3000 hrs 0.2067 cfs 14.6000 hrs 0.1948 cfs 15.0000 hrs 0.1825 cfs 15.5000 hrs 0.1657 cfs — 16.0000 hrs 0.1488 cfs 16.5000 hrs 0.1365 cfs 17.0000 hrs 0.1283 cfs _ 17.5000 hrs 0.1238 cfs 18.0000 hrs 0.1160 cfs 19.0000 hrs 0.1032 cfs 20.0000 hrs 0.0901 cfs — 22.0000 hrs 0.0819 cfs 26.0000 hrs 0.0000 cfs Total Flow Values — 11.0000 hrs 0.0000 cfs 11.3000 hrs 0.0000 cfs 11.6000 hrs 0.0000 cfs — 11.9000 hrs 0.1434 cfs 12.0000 hrs 0.6647 cfs 12.1000 hrs 2.0454 cfs 12.2000 hrs 2.7213 cfs - 12.3000 hrs 1.9651 cfs 12.4000 hrs 1.1094 cfs 12.5000 hrs 0.8059 cfs - 12.6000 hrs 0.6486 cfs 12.7000 hrs 0.5367 cfs 12.8000 hrs 0.4558 cfs 13.0000 hrs 0.3865 cfs - 13.2000 hrs 0.3381 cfs 13.4000 hrs 0.3052 cfs Page 1 tmp#15.txt 13.6000 hrs 0.2806 cfs 13.8000 hrs 0.2560 cfs - 14.0000 hrs 0.2355 cfs 14.3000 hrs 0.2067 cfs 14.6000 hrs 0.1948 cfs _ 15.0000 hrs 0.1825 cfs 15.5000 hrs 0.1657 cfs 16.0000 hrs 0.1488 cfs 16.5000 hrs 0.1365 cfs - 17.0000 hrs 0.1283 cfs 17.5000 hrs 0.1238 cfs 18.0000 hrs 0.1160 cfs 19.0000 hrs 0.1032 cfs - 20.0000 hrs 0.0901 cfs 22.0000 hrs 0.0819 cfs 26.0000 hrs 0.0000 cfs Peak Time and Flow 12.2000 hrs 2.7213 cfs Page 2 tmp#15.txt TR-55 Tabular Hydrograph Method — Input Summary Description Basin E historical 100-year Rainfall Distribution Type II - la/P Interpolation On Total Area 0.0073 mil - Peak Time 12.2000 hrs Peak Flow 10.7850 cfs Given Input Data: Subarea D/S Subareas Area CN Tc Tt Rainfall Description (mi2) (hrs) (hrs) (in) E 0.0073 69 0.1680 0.0000 5.0000 Support Data: Messages: Info: Time of Concentration rounded to 0.2000 hrs in row<1>. Page 1 tmp#15.txt TR-55 Tabular Data BASIN E 100-YR HYDROGRAPH 11.0000 hrs 0.1966 cfs 11.3000 hrs 0.2650 cfs — 11.6000 hrs 0.4017 cfs 11.9000 hrs 2.0072 cfs 12.0000 hrs 4.4638 cfs - 12.1000 hrs 9.4027 cfs 12.2000 hrs 10.7850 cfs 12.3000 hrs 6.9258 cfs 12.4000 hrs 3.6998 cfs — 12.5000 hrs 2.5402 cfs 12.6000 hrs 1.9888 cfs 12.7000 hrs 1.6080 cfs 12.8000 hrs 1.3580 cfs 13.0000 hrs 1.1250 cfs 13.2000 hrs 0.9801 cfs 13.4000 hrs 0.8750 cfs - 13.6000 hrs 0.7983 cfs 13.8000 hrs 0.7215 cfs 14.0000 hrs 0.6590 cfs 14.3000 hrs 0.5767 cfs 14.6000 hrs 0.5426 cfs 15.0000 hrs 0.4999 cfs 15.5000 hrs 0.4516 cfs -- 16.0000 hrs 0.4033 cfs 16.5000 hrs 0.3607 cfs 17.0000 hrs 0.3408 cfs 17.5000 hrs 0.3266 cfs — 18.0000 hrs 0.3068 cfs 19.0000 hrs 0.2727 cfs 20.0000 hrs 0.2300 cfs — 22.0000 hrs 0.2102 cfs 26.0000 hrs 0.0000 cfs Total Flow Values — 11.0000 hrs 0.1966 cfs 11.3000 hrs 0.2650 cfs 11.6000 hrs 0.4017 cfs 11.9000 hrs 2.0072 cfs 12.0000 hrs 4.4638 cfs 12.1000 hrs 9.4027 cfs 12.2000 hrs 10.7850 cfs — 12.3000 hrs 6.9258 cfs 12.4000 hrs 3.6998 cfs 12.5000 hrs 2.5402 cfs - 12.6000 hrs 1.9888 cfs 12.7000 hrs 1.6080 cfs 12.8000 hrs 1.3580 cfs 13.0000 hrs 1.1250 cfs - 13.2000 hrs 0.9801 cfs 13.4000 hrs 0.8750 cfs Page 1 tmp#15.txt 13.6000 hrs 0.7983 cfs 13.8000 hrs 0.7215 cfs - 14.0000 hrs 0.6590 cfs 14.3000 hrs 0.5767 cfs 14.6000 hrs 0.5426 cfs 15.0000 hrs 0.4999 cfs - 15.5000 hrs 0.4516 cfs 16.0000 hrs 0.4033 cfs 16.5000 hrs 0.3607 cfs _ 17.0000 hrs 0.3408 cfs 17.5000 hrs 0.3266 cfs 18.0000 hrs 0.3068 cfs 19.0000 hrs 0.2727 cfs - 20.0000 hrs 0.2300 cfs 22.0000 hrs 0.2102 cfs 26.0000 hrs 0.0000 cfs Peak Time and Flow 12.2000 hrs 10.7850 cfs Page 2 I i Developed Sub-basin B 1 1 1 I 1 I 11 I Developed Sub-basins 9 — tmp#16 .txt TR-55 Tabular Hydrograph Method Input Summary Description Developed 100-year Rainfall Distribution Type II _ Ia/P Interpolation On Total Area 12 .1600 ac Peak Time 12 .4000 hrs — Peak Flow 25.5896 cfs Given Input Data: — Subarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) D E, F,G,H, I,J,K 0.4500 84 0.1060 0. 0120 5.0000 E J, I 4.8300 69 0.1140 0.0820 5 .0000 F E,G,H, I,J,K 0.7200 84 0.1000 0.0730 5 .0000 G E,H, I,J,K 1.3400 84 0.1000 0.1000 5 .0000 H E, I,J 1.2800 84 0.1000 0.0950 5 .0000 I 1.3700 84 0.1000 0.1000 5.0000 J I 0.8100 98 0.1000 0.1000 5.0000 K E,G,H, I,J 1 .3600 98 0.1000 0 .1000 5.0000 Support Data: Messages: Info: Time of Concentration rounded to 0 .2000 hrs in row <1>. — Info: Time of Travel rounded to 0.5000 hrs in row <1>. Info: Time of Concentration rounded to 0 .1000 hrs in row <2>. Info: Time of Concentration rounded to 0.2000 hrs in row <3>. Info: Time of Travel rounded to 0.5000 hrs in row <3>. _ Info: Time of Travel rounded to 0.5000 hrs in row <4>. Info: Time of Concentration rounded to 0.2000 hrs in row <5>. Info: Time of Travel rounded to 0.2000 hrs in row <5>. Info: Time of Travel rounded to 0.5000 hrs in row <8>. Page 1 tmp#16.txt TR-55 Tabular Data DEVELOPED BASIN 100-YEAR ROUTED HYDROGRAPH 11 .0000 hrs 0.0299 cfs 11 .3000 hrs 0.0414 cfs 11 .6000 hrs 0.0552 cfs 11 .9000 hrs 0.0805 cfs 12 .0000 hrs 0.0920 cfs 12 .1000 hrs 0.1196 cfs — 12 .2000 hrs 0. 1840 cfs 12 .3000 hrs 0.3265 cfs 12 .4000 hrs 0.6025 cfs 12.5000 hrs 0.9428 cfs — 12.6000 hrs 1.1590 cfs 12.7000 hrs 1.1636 cfs 12 .8000 hrs 1.0141 cfs 13 .0000 hrs 0.6186 cfs — 13 .2000 hrs 0.3518 cfs 13 .4000 hrs 0.2254 cfs 13 .6000 hrs 0.1679 cfs 13 .8000 hrs 0.1403 cfs — 14 .0000 hrs 0.1219 cfs 14 .3000 hrs 0.1035 cfs 14 .6000 hrs 0.0897 cfs 15.0000 hrs 0.0782 cfs 15.5000 hrs 0.0690 cfs 16.0000 hrs 0.0621 cfs 16.5000 hrs 0.0552 cfs 17.0000 hrs 0.0506 cfs 17.5000 hrs 0.0460 cfs 18.0000 hrs 0.0437 cfs 19.0000 hrs 0.0391 cfs - 20 . 0000 hrs 0.0345 cfs 22 . 0000 hrs 0.0276 cfs 26 .0000 hrs 0.0000 cfs E 11. 0000 hrs 0.1599 cfs 11 .3000 hrs 0.2221 cfs — 11 .6000 hrs 0.3110 cfs 11. 9000 hrs 0.5420 cfs 12 . 0000 hrs 1.0538 cfs 12 . 1000 hrs 2 .3635 cfs — 12 .2000 hrs 5.4917 cfs 12 .3000 hrs 9.8401 cfs 12 .4000 hrs 9.7988 cfs 12 . 5000 hrs 6.8612 cfs — 12 .6000 hrs 4 .5205 cfs 12 .7000 hrs 3 .1344 cfs 12 .8000 hrs 2.3248 cfs 13 .0000 hrs 1.5122 cfs 13 .2000 hrs 1.2020 cfs 13 .4000 hrs 1.0277 cfs 13 . 6000 hrs 0. 9095 cfs 13 . 8000 hrs 0.8239 cfs 14 .0000 hrs 0.7442 cfs 14 .3000 hrs 0.6496 cfs Page 1 tmp#16 .txt 14 .6000 hrs 0 .5847 cfs 15 . 0000 hrs 0 .5404 cfs _. 15 . 5000 hrs 0 .4901 cfs 16 . 0000 hrs 0 .4399 cfs 16 . 5000 hrs 0.3897 cfs 17. 0000 hrs 0 .3691 cfs - 17. 5000 hrs 0 .3395 cfs 18. 0000 hrs 0.3248 cfs 19. 0000 hrs 0.2893 cfs 20. 0000 hrs 0.2480 cfs - 22 . 0000 hrs 0.2185 cfs 26 .0000 hrs 0.0000 cfs - F 11.0000 hrs 0.0478 cfs 11 .3000 hrs 0.0662 cfs 11 .6000 hrs 0.0883 cfs - 11 . 9000 hrs 0.1288 cfs 12 .0000 hrs 0.1472 cfs 12 . 1000 hrs 0.1913 cfs 12 .2000 hrs 0.2943 cfs - 12 .3000 hrs 0 .5224 cfs 12 .4000 hrs 0 . 9640 cfs 12 .5000 hrs 1 .5085 cfs 12 .6000 hrs 1 . 8543 cfs 12 .7000 hrs 1 . 8617 cfs 12 .8000 hrs 1 .6225 cfs 13 .0000 hrs 0 .9897 cfs 13 .2000 hrs 0.5629 cfs 13 .4000 hrs 0.3606 cfs 13 .6000 hrs 0.2686 cfs 13 .8000 hrs 0.2244 cfs - 14 .0000 hrs 0.1950 cfs 14 .3000 hrs 0.1656 cfs 14 .6000 hrs 0.1435 cfs 15.0000 hrs 0. 1251 cfs - 15.5000 hrs 0.1104 cfs 16 .0000 hrs 0.0993 cfs 16.5000 hrs 0.0883 cfs 17 .0000 hrs 0.0809 cfs - 17.5000 hrs 0.0736 cfs 18 .0000 hrs 0.0699 cfs 19.0000 hrs 0.0625 cfs 20.0000 hrs 0.0552 cfs - 22.0000 hrs 0.0442 cfs 26 .0000 hrs 0.0000 cfs - G 11 .0000 hrs 0.0959 cfs 11.3000 hrs 0 . 1301 cfs 1.6000 hrs 0 . 1780 cfs - 1.9000 hrs 0 .2671 cfs e .0000 hrs 0 .3218 cfs .1000 hrs 0.4656 cfs .2000 hrs 0.8012 cfs 3000 hrs 1.5064 cfs 4000 hrs 2.6842 cfs Page 2 tmp#16 .txt 12 .5000 hrs 3 .6360 cfs 12 .6000 hrs 3 .7866 cfs 12 .7000 hrs 3 .3005 cfs 12 .8000 hrs 2.6020 cfs 13 .0000 hrs 1.4311 cfs 13 .2000 hrs 0.8285 cfs - 13 .4000 hrs 0.5752 cfs 13 .6000 hrs 0.4588 cfs 13 .8000 hrs 0.3903 cfs 14 .0000 hrs 0 .3492 cfs - 14 .3000 hrs 0.2944 cfs 14 .6000 hrs 0.2602 cfs 15.0000 hrs 0.2260 cfs 15 .5000 hrs 0.2054 cfs - 16 .0000 hrs 0.1849 cfs 16 .5000 hrs 0.1575 cfs 17 .0000 hrs 0.1438 cfs 17.5000 hrs 0.1369 cfs - 18.0000 hrs 0.1301 cfs 19.0000 hrs 0.1164 cfs 20 .0000 hrs 0.0959 cfs 22 .0000 hrs 0.0822 cfs 26 .0000 hrs 0.0000 cfs _ H 11.0000 hrs 0.1112 cfs 11.3000 hrs 0.1504 cfs 11 .6000 hrs 0.2093 cfs 11 . 9000 hrs 0 .3205 cfs 12 . 0000 hrs 0.4840 cfs 12 .1000 hrs 0.8896 cfs 12.2000 hrs 1.7137 cfs - 12 .3000 hrs 3 .1919 cfs 12 .4000 hrs 4.2646 cfs 12 .5000 hrs 3 .8853 cfs 12 .6000 hrs 2 .8453 cfs - 12 .7000 hrs 1.9492 cfs 12 .8000 hrs 1.3540 cfs 13 .0000 hrs 0.7522 cfs 13 .2000 hrs 0 .5298 cfs - 13 .4000 hrs 0 .4382 cfs 13 .6000 hrs 0.3794 cfs 13 .8000 hrs 0.3336 cfs 14 .0000 hrs 0.3009 cfs - 14 .3000 hrs 0 .2616 cfs 14 .6000 hrs 0 .2289 cfs 15.0000 hrs 0.2093 cfs _ 15 .5000 hrs 0.1897 cfs 16 .0000 hrs 0. 1701 cfs 16 . 5000 hrs 0 . 1504 cfs 17.0000 hrs 0.1374 cfs 17 .5000 hrs 0.1308 cfs 18 .0000 hrs 0.1243 cfs 19 . 0000 hrs 0 . 1047 cfs 20.0000 hrs 0 .0916 cfs - 22 .0000 hrs 0.0785 cfs 26 .0000 hrs 0.0000 cfs Page 3 tmp#16 .txt I 11.0000 hrs 0.1680 cfs 11.3000 hrs 0.2380 cfs 11.6000 hrs 0.3710 cfs 11. 9000 hrs 2.3382 cfs _ 12 .0000 hrs 4 .5295 cfs 12 .1000 hrs 7.0708 cfs 12.2000 hrs 4 .3965 cfs 12.3000 hrs 1 .5192 cfs - 12.4000 hrs 1.0291 cfs 12.5000 hrs 0.8611 cfs 12.6000 hrs 0.7281 cfs 12 .7000 hrs 0.6021 cfs - 12 .8000 hrs 0.5321 cfs 13 .0000 hrs 0 .4620 cfs 13 .2000 hrs 0 .3990 cfs 13.4000 hrs 0 .3570 cfs - 13.6000 hrs 0.3220 cfs 13.8000 hrs 0.2940 cfs 14 .0000 hrs 0.2660 cfs 14 .3000 hrs 0 .2380 cfs - 14 .6000 hrs 0 .2240 cfs 15.0000 hrs 0 .2030 cfs 15.5000 hrs 0.1820 cfs _ 16.0000 hrs 0.1610 cfs 16 .5000 hrs 0.1470 cfs 17.0000 hrs 0.1400 cfs 17.5000 hrs 0 .1330 cfs 18.0000 hrs 0 .1260 cfs 19.0000 hrs 0.1050 cfs 20.0000 hrs 0.0910 cfs 22 .0000 hrs 0.0840 cfs - 26.0000 hrs 0.0000 cfs J - 11.0000 hrs 0.1266 cfs 11.3000 hrs 0.1748 cfs 11.6000 hrs 0.2592 cfs 11.9000 hrs 0.8078 cfs - 12.0000 hrs 1 .6096 cfs 12.1000 hrs 3 .1348 cfs 12.2000 hrs 5 .1060 cfs 12 .3000 hrs 4 .2259 cfs - 12 .4000 hrs 2.2787 cfs 12.5000 hrs 1.3504 cfs 12.6000 hrs 0 . 9465 cfs _ 12.7000 hrs 0 .7355 cfs 12 .8000 hrs 0.5908 cfs 13 .0000 hrs 0.4521 cfs 13 .2000 hrs 0.3858 cfs 13 .4000 hrs 0.3376 cfs 13.6000 hrs 0 .3014 cfs 13 .8000 hrs 0.2713 cfs 14 .0000 hrs 0.2472 cfs - 14.3000 hrs 0.2170 cfs 14.6000 hrs 0 .1989 cfs 15.0000 hrs 0.1809 cfs Page 4 tmp#16 .txt 15.5000 hrs 0.1628 cfs 16.0000 hrs 0.1447 cfs 16.5000 hrs 0.1266 cfs 17.0000 hrs 0.1206 cfs 17 .5000 hrs 0.1145 cfs 18 .0000 hrs 0.1085 cfs - 19.0000 hrs 0.0965 cfs 20.0000 hrs 0.0784 cfs 22 .0000 hrs 0.0723 cfs 26 .0000 hrs 0.0000 cfs K 11 .0000 hrs 0.1417 cfs - 11.3000 hrs 0.1923 cfs 11.6000 hrs 0.2632 cfs 11.9000 hrs 0.3947 cfs 12 .0000 hrs 0.4757 cfs - 12 .1000 hrs 0.6883 cfs 12 .2000 hrs 1.1842 cfs 12 .3000 hrs 2.2268 cfs 12 .4000 hrs 3 .9677 cfs - 12 .5000 hrs 5.3746 cfs 12 .6000 hrs 5.5973 cfs 12 .7000 hrs 4.8787 cfs 12 .8000 hrs 3 .8463 cfs - 13 .0000 hrs 2 .1154 cfs 13 .2000 hrs 1.2247 cfs 13 .4000 hrs 0.8502 cfs 13 .6000 hrs 0.6782 cfs 13 .8000 hrs 0.5769 cfs 14 .0000 hrs 0.5162 cfs 14 .3000 hrs 0 .4352 cfs - 14 .6000 hrs 0 .3846 cfs 15.0000 hrs 0.3340 cfs 15 .5000 hrs 0.3037 cfs 16 .0000 hrs 0.2733 cfs - 16 .5000 hrs 0.2328 cfs 17 .0000 hrs 0.2126 cfs 17 .5000 hrs 0 .2024 cfs 18 .0000 hrs 0 .1923 cfs - 19.0000 hrs 0.1721 cfs 20.0000 hrs 0.1417 cfs 22.0000 hrs 0.1215 cfs 26 .0000 hrs 0.0000 cfs Total Flow Values 11 .0000 hrs 0.8810 cfs _ 11 .3000 hrs 1.2154 cfs 11.6000 hrs 1.7352 cfs 11 . 9000 hrs 4 .8796 cfs 12 .0000 hrs 8 .7136 cfs 12 .1000 hrs 14 .9234 cfs 12 .2000 hrs 19. 1716 cfs 12 .3000 hrs 23 . 3593 cfs 12 .4000 hrs 25 .5896 cfs - 12 .5000 hrs 24 .4198 cfs 12 .6000 hrs 21.4376 cfs 12 .7000 hrs 17.6255 cfs Page 5 tmp#16 .txt 12 . 8000 hrs 13 .8865 cfs 13 . 0000 hrs 8 .3334 cfs - 13 .2000 hrs 5 .4847 cfs 13 .4000 hrs 4 .1719 cfs 13 .6000 hrs 3 .4857 cfs 13 . 8000 hrs 3 .0547 cfs - 14 . 0000 hrs 2.7405 cfs 14 . 3000 hrs 2.3650 cfs 14 . 6000 hrs 2 . 1146 cfs 15. 0000 hrs 1.8968 cfs - 15.5000 hrs 1 .7131 cfs 16 .0000 hrs 1.5353 cfs 16 .5000 hrs 1.3476 cfs 17. 0000 hrs 1.2549 cfs - 17. 5000 hrs 1 . 1769 cfs 18. 0000 hrs 1 . 1196 cfs 19.0000 hrs 0 .9856 cfs _ 20.0000 hrs 0 .8362 cfs 22 .0000 hrs 0.7287 cfs 26 . 0000 hrs 0.0000 cfs Peak Time and Flow 12 .4000 hrs 25. 5896 cfs C Page 6 tmp#16 .txt TR-55 Tabular Hydrograph Method Input Summary Description Developed 5-year Rainfall Distribution Type II Ia/P Interpolation On Total Area 12.1600 ac Peak Time 12 .5000 hrs Peak Flow 9.6689 cfs Given Input Data: Subarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) D E, F,G,H, I,J,K 0.4500 84 0.1060 0.0120 2.8000 E J, I 4.8300 69 0.1140 0.0820 2 .8000 F E,G,H, I,J,K 0.7200 84 0.1000 0.0730 2 .8000 G E,H, I,J,K 1.3400 84 0.1000 0.1000 2 .8000 _ H E, I,J 1.2800 84 0.1000 0.0950 2 .8000 I 1.3700 84 0.1000 0.1000 2 .8000 J I 0.8100 98 0.1000 0.1000 2 .8000 K E,G,H, I,J 1.3600 98 0.1000 0.1000 2 .8000 Support Data: Messages: _ Info: Time of Concentration rounded to 0 .2000 hrs in row <1>. Info: Time of Travel rounded to 0.5000 hrs in row <1>. Info: Time of Concentration rounded to 0 .1000 hrs in row <2>. Info: Time of Concentration rounded to 0.2000 hrs in row <3>. Info: Time of Travel rounded to 0.5000 hrs in row <3>. Info: Time of Travel rounded to 0.5000 hrs in row <4>. Info: Time of Concentration rounded to 0 .2000 hrs in row <5>. Info: Time of Travel rounded to 0.2000 hrs in row <5>. -_ Info: Time of Travel rounded to 0.5000 hrs in row <8>. Page 1 tmp#16 .txt TR-55 Tabular Data DEVELOPED BASIN 5-YEAR ROUTED HYDROGRAPH 11.0000 hrs 0 .0101 cfs 11 .3000 hrs 0 .0140 cfs 11 .6000 hrs 0 .0187 cfs 11.9000 hrs 0 .0273 cfs 12 .0000 hrs 0 .0312 cfs 12 .1000 hrs 0.0406 cfs - 12 .2000 hrs 0.0634 cfs 12 .3000 hrs 0.1164 cfs 12 .4000 hrs 0.2250 cfs 12 .5000 hrs 0.3641 cfs - 12 .6000 hrs 0.4573 cfs 12 .7000 hrs 0.4659 cfs 12 .8000 hrs 0.4111 cfs 13 .0000 hrs 0 .2563 cfs - 13 .2000 hrs 0.1490 cfs 13 .4000 hrs 0.0972 cfs 13 .6000 hrs 0. 0732 cfs 13 .8000 hrs 0.0615 cfs 14 .0000 hrs 0.0537 cfs 14 .3000 hrs 0.0457 cfs 14 .6000 hrs 0.0399 cfs _ 15 .0000 hrs 0.0348 cfs 15 .5000 hrs 0.0309 cfs 16 .0000 hrs 0.0279 cfs 16 .5000 hrs 0.0247 cfs 17 .0000 hrs 0 .0227 cfs 17 .5000 hrs 0.0207 cfs 18 .0000 hrs 0.0198 cfs 19.0000 hrs 0.0177 cfs - 20 .0000 hrs 0.0155 cfs 22 .0000 hrs 0.0126 cfs 26 .0000 hrs 0.0000 cfs E 11 .0000 hrs 0.0000 cfs 11 .3000 hrs 0.0000 cfs - 11 .6000 hrs 0.0000 cfs 11.9000 hrs 0.0000 cfs 12 .0000 hrs 0.0497 cfs 12 .1000 hrs 0.3081 cfs - 12 .2000 hrs 1.2700 cfs 12 .3000 hrs 2 .4779 cfs 12 .4000 hrs 2.4380 cfs _ 12 .5000 hrs 1.7520 cfs 12 .6000 hrs 1 .2192 cfs 12 .7000 hrs 0. 9006 cfs 12 .8000 hrs 0.6997 cfs 13 .0000 hrs 0.4894 cfs 13 .2000 hrs 0.4034 cfs 13 .4000 hrs 0.3497 cfs 13 .6000 hrs 0.3160 cfs - 13 .8000 hrs 0.2865 cfs 14 .0000 hrs 0.2614 cfs 14 .3000 hrs 0.2311 cfs Page 1 tmp#16 .txt 14 .6000 hrs 0.2102 cfs 15 .0000 hrs 0.1974 cfs 15 .5000 hrs 0.1803 cfs 16 .0000 hrs 0.1628 cfs 16 .5000 hrs 0.1457 cfs 17 .0000 hrs 0.1372 cfs - 17 .5000 hrs 0.1291 cfs 18 .0000 hrs 0.1244 cfs 19.0000 hrs 0.1111 cfs 20 .0000 hrs 0.0936 cfs - 22 .0000 hrs 0.0851 cfs 26 .0000 hrs 0.0000 cfs - F 11 .0000 hrs 0.0162 cfs 11 .3000 hrs 0.0225 cfs 11 .6000 hrs 0.0300 cfs - 11 . 9000 hrs 0.0437 cfs 12 .0000 hrs 0.0499 cfs 12 .1000 hrs 0.0649 cfs 12 .2000 hrs 0.1015 cfs 12 .3000 hrs 0.1863 cfs 12 .4000 hrs 0.3599 cfs 12 .5000 hrs 0.5825 cfs 12 .6000 hrs 0.7317 cfs 12 .7000 hrs 0.7454 cfs 12 .8000 hrs 0.6577 cfs 13 .0000 hrs 0.4101 cfs - 13 .2000 hrs 0 .2384 cfs 13 .4000 hrs 0 . 1555 cfs 13 .6000 hrs 0.1172 cfs 13 .8000 hrs 0 .0984 cfs - 14 .0000 hrs 0 .0859 cfs 14 .3000 hrs 0 .0732 cfs 14 .6000 hrs 0 .0638 cfs 15.0000 hrs 0 .0556 cfs - 15.5000 hrs 0 .0495 cfs 16 .0000 hrs 0.0447 cfs 16 .5000 hrs 0 .0396 cfs 17 .0000 hrs 0.0362 cfs - 17 .5000 hrs 0.0332 cfs 18 .0000 hrs 0.0317 cfs 19 .0000 hrs 0.0284 cfs 20 .0000 hrs 0.0248 cfs 22 .0000 hrs 0.0202 cfs 26 .0000 hrs 0.0000 cfs G 11.0000 hrs 0 .0325 cfs 11 .3000 hrs 0.0441 cfs - 11 .6000 hrs 0.0604 cfs 11 .9000 hrs 0 .0906 cfs 12 .0000 hrs 0 .1092 cfs 12 .1000 hrs 0 .1600 cfs - 12 .2000 hrs 0.2856 cfs 12 .3000 hrs 0.5698 cfs 12 .4000 hrs 1.0572 cfs Page 2 tmp#16 .txt 12.5000 hrs 1.4526 cfs 12.6000 hrs 1.5221 cfs - 12.7000 hrs 1.3347 cfs 12.8000 hrs 1.0594 cfs 13.0000 hrs 0 .5943 cfs 13.2000 hrs 0.3516 cfs - 13.4000 hrs 0.2477 cfs 13.6000 hrs 0.1996 cfs 13.8000 hrs 0.1712 cfs 14.0000 hrs 0.1532 cfs - 14 .3000 hrs 0.1300 cfs 14.6000 hrs 0.1148 cfs 15.0000 hrs 0.1007 cfs 15.5000 hrs 0.0917 cfs - 16.0000 hrs 0.0826 cfs 16.5000 hrs 0.0708 cfs 17.0000 hrs 0.0651 cfs 17.5000 hrs 0.0618 cfs 18.0000 hrs 0.0589 cfs 19.0000 hrs 0.0523 cfs 20.0000 hrs 0 .0438 cfs 22.0000 hrs 0.0376 cfs 26.0000 hrs 0. 0000 cfs H 11.0000 hrs 0 .0377 cfs 11.3000 hrs 0 .0510 cfs 11.6000 hrs 0.0710 cfs - 11.9000 hrs 0 .1097 cfs 12.0000 hrs 0.1735 cfs 12.1000 hrs 0.3467 cfs 12.2000 hrs 0.7287 cfs - 12.3000 hrs 1.3272 cfs 12.4000 hrs 1.7009 cfs 12.5000 hrs 1.5205 cfs 12.6000 hrs 1. 1145 cfs - 12 .7000 hrs 0.7725 cfs 12 .8000 hrs 0.5452 cfs 13 .0000 hrs 0.3132 cfs 13 .2000 hrs 0.2261 cfs - 13 .4000 hrs 0 . 1887 cfs 13 .6000 hrs 0 . 1643 cfs 13 .8000 hrs 0.1459 cfs _ 14.0000 hrs 0.1318 cfs 14.3000 hrs 0.1146 cfs 14.6000 hrs 0.1011 cfs 15.0000 hrs 0.0930 cfs 15.5000 hrs 0.0844 cfs 16.0000 hrs 0 . 0757 cfs 16.5000 hrs 0. 0671 cfs 17.0000 hrs 0.0617 cfs - 17.5000 hrs 0 .0585 cfs 18.0000 hrs 0 .0558 cfs 19.0000 hrs 0.0477 cfs 20.0000 hrs 0.0413 cfs - 22 .0000 hrs 0.0359 cfs 26.0000 hrs 0. 0000 cfs Page 3 tmp#16.txt I 11.0000 hrs 0.0570 cfs 11.3000 hrs 0.0807 cfs 11.6000 hrs 0.1259 cfs 11.9000 hrs 0.8736 cfs 12.0000 hrs 1.8332 cfs 12.1000 hrs 2.8874 cfs 12.2000 hrs 1.7651 cfs 12.3000 hrs 0 .6287 cfs - 12.4000 hrs 0 .4389 cfs 12.5000 hrs 0 . 3699 cfs 12.6000 hrs 0.3128 cfs 12.7000 hrs 0.2601 cfs - 12 .8000 hrs 0.2311 cfs 13 .0000 hrs 0.2017 cfs 13 .2000 hrs 0.1751 cfs 13.4000 hrs 0 .1572 cfs - 13.6000 hrs 0 . 1421 cfs 13.8000 hrs 0 . 1300 cfs 14.0000 hrs 0.1179 cfs 14 .3000 hrs 0.1058 cfs - 14 .6000 hrs 0.1000 cfs 15.0000 hrs 0 .0908 cfs 15.5000 hrs 0 .0816 cfs _ 16.0000 hrs 0 .0724 cfs 16.5000 hrs 0 . 0661 cfs 17.0000 hrs 0 .0632 cfs 17.5000 hrs 0 .0597 cfs 18.0000 hrs 0.0568 cfs 19.0000 hrs 0.0482 cfs 20.0000 hrs 0.0413 cfs 22.0000 hrs 0.0384 cfs - 26.0000 hrs 0.0000 cfs J - 11.0000 hrs 0.0683 cfs 11.3000 hrs 0.0943 cfs 11.6000 hrs 0.1398 cfs 11.9000 hrs 0.4357 cfs - 12.0000 hrs 0 .8682 cfs 12.1000 hrs 1 .6908 cfs 12.2000 hrs 2 .7541 cfs 12.3000 hrs 2 .2794 cfs -' 12.4000 hrs 1.2291 cfs 12.5000 hrs 0.7284 cfs 12.6000 hrs 0.5105 cfs 12.7000 hrs 0 .3967 cfs 12 .8000 hrs 0 .3187 cfs 13 .0000 hrs 0 .2439 cfs 13 .2000 hrs 0.2081 cfs 13 .4000 hrs 0.1821 cfs 13.6000 hrs 0 .1626 cfs 13.8000 hrs 0 . 1463 cfs 14.0000 hrs 0 . 1333 cfs - 14 .3000 hrs 0 .1171 cfs 14.6000 hrs 0.1073 cfs 15.0000 hrs 0.0975 cfs Page 4 tmp#16 .txt 15.5000 hrs 0 .0878 cfs 16.0000 hrs 0.0780 cfs 16.5000 hrs 0.0683 cfs 17.0000 hrs 0.0650 cfs 17.5000 hrs 0.0618 cfs 18.0000 hrs 0.0585 cfs 19.0000 hrs 0.0520 cfs 20.0000 hrs 0.0423 cfs 22.0000 hrs 0 .0390 cfs 26.0000 hrs 0 .0000 cfs K 11.0000 hrs 0 .0764 cfs - 11.3000 hrs 0. 1037 cfs 11.6000 hrs 0.1419 cfs 11.9000 hrs 0.2129 cfs 12.0000 hrs 0.2566 cfs - 12.1000 hrs 0.3712 cfs 12.2000 hrs 0.6388 cfs 12.3000 hrs 1.2011 cfs 12.4000 hrs 2 .1401 cfs - 12 .5000 hrs 2 .8990 cfs 12.6000 hrs 3 .0191 cfs 12 .7000 hrs 2 .6315 cfs 12.8000 hrs 2 . 0746 cfs 13 .0000 hrs 1 . 1410 cfs 13 .2000 hrs 0 . 6606 cfs 13 .4000 hrs 0 .4586 cfs 13 .6000 hrs 0 .3658 cfs 13 .8000 hrs 0 .3112 cfs 14 .0000 hrs 0.2784 cfs 14.3000 hrs 0.2348 cfs - 14.6000 hrs 0.2075 cfs 15.0000 hrs 0. 1802 cfs 15.5000 hrs 0. 1638 cfs 16.0000 hrs 0. 1474 cfs - 16.5000 hrs 0.1256 cfs 17.0000 hrs 0.1146 cfs 17.5000 hrs 0.1092 cfs 18.0000 hrs 0.1037 cfs - 19.0000 hrs 0.0928 cfs 20.0000 hrs 0. 0764 cfs 22.0000 hrs 0.0655 cfs 26.0000 hrs 0.0000 cfs Total Flow Values 11.0000 hrs 0.2983 cfs _ 11.3000 hrs 0.4104 cfs 11.6000 hrs 0.5877 cfs 11.9000 hrs 1.7935 cfs 12.0000 hrs 3 .3714 cfs 12.1000 hrs 5.6697 cfs 12.2000 hrs 7.6071 cfs 12.3000 hrs 8.7867 cfs 12 .4000 hrs 9.5891 cfs - 12.5000 hrs 9. 6689 cfs 12.6000 hrs 8.8871 cfs 12.7000 hrs 7.5073 cfs Page 5 tmp#16.txt 12.8000 hrs 5.9975 cfs 13 .0000 hrs 3 .6499 cfs 13.2000 hrs 2 .4122 cfs 13.4000 hrs 1 .8366 cfs 13 .6000 hrs 1.5408 cfs 13 .8000 hrs 1.3510 cfs - 14 .0000 hrs 1.2157 cfs 14.3000 hrs 1.0523 cfs 14.6000 hrs 0 .9445 cfs 15.0000 hrs 0 .8499 cfs - 15.5000 hrs 0.7700 cfs 16.0000 hrs 0.6916 cfs 16.5000 hrs 0.6079 cfs 17.0000 hrs 0. 5658 cfs - 17.5000 hrs 0 .5341 cfs 18.0000 hrs 0 .5097 cfs 19.0000 hrs 0.4502 cfs 20.0000 hrs 0.3790 cfs - 22.0000 hrs 0.3343 cfs 26.0000 hrs 0 . 0000 cfs Peak Time and Flow 12.5000 hrs 9.6689 cfs Page 6 DRIVECG.txt DRIVEABLE CURB AND GUTTER CAPACITY Channel Calculator Given Input Data: Shape Trapezoidal Solving for Flowrate Slope 0.0060 ft/ft Manning's n 0.0130 Depth 4.4100 in Height 4.7500 in Bottom width 0.1000 in Left slope 0.0200 fUft(V/H) Right slope 0.1985 ft/ft(V/H) Computed Results: Flowrate 10.6338 cfs Velocity 2.8588 fps Full Flowrate 12.9619 cfs Flow area 3.7197 ft2 Flow perimeter 243.2942 in Hydraulic radius 2.2016 in Top width 242.8166 in _ Area 4.3151 ft2 Perimeter 262.0438 in Percent full 92.8421 % Critical Information Critical depth 4.7048 in Critical slope 0.0042 fUft Critical velocity 2.5119 fps Critical area 4.2334 ft2 Critical perimeter 259.5518 in Critical hydraulic radius 2.3487 in Critical top width 259.0423 in Specific energy 0.4945 ft Minimum energy 0.5881 ft Froude number 1.1755 Flow condition Supercritical Page 1 VERTCG.txt VERTICAL CURB CAPACITY Channel Calculator Given Input Data: Shape Trapezoidal Solving for Flowrate Slope 0.0080 ft/ft Manning's n 0.0130 Depth 2.2000 in Height 2.4000 in Bottom width 0.1000 in Left slope 0.0200 ft/ft(V/H) Right slope 5.0000 ft/ft(V/H) Computed Results: Flowrate 1.7387 cfs Velocity 2.0572 fps Full Flowrate 2.1923 cfs Flow area 0.8452 ft2 Flow perimeter 112.3656 in Hydraulic radius 1.0831 in Top width 110.5400 in Area 1.0057 ft2 Perimeter 122.5715 in Percent full 91.6667 % Critical Information Critical depth 2.3645 in Critical slope 0.0054 fUft Critical velocity 1.7811 fps Critical area 0.9762 ft2 Critical perimeter 120.7603 in Critical hydraulic radius 1.1640 in Critical top width 118.7982 in Specific energy 0.2491 ft Minimum energy 0.2956 ft Froude number 1.1974 Flow condition Supercritical Page 1 Developed Sub-basin A -17 V 10 DEVELOPED Tc Worksheet 3: Time of concentration(Tc)or travel time(Tt) Project: Lighthouse Cove By:jkd Date: 08/11/2000 Location: Weld County,Co Checked:jkd Date: 08/11/2000 DEVELOPEDTc.%LS - Condition: Developed Calculations for:Tc NOTES: Basin A Sheet Flow(Applicable to Tc Only) Segment ID - 1. Surface description(table 3-1) light 2. Manning's roughness coeff.,n(table 3-1) 0.015 3. Flow length,L(total L<=300 ft.) ft 47 4. Two-yr 24-hr rainfall,P2 in 2.1 - 5. Land slope,s ft/ft 0.0213 6. Tt=[0.007(nL)A(0.8)]/[P2A(0.5)510.4)) Compute Tt hr 0.02 0.017 Shallow concentrated flow Segment ID 2 7. Surface description(paved or unpaved) unpaved 8. Flow length,L ft 43 - 9. Watercourse slope,s ft/ft 0.2 10. Average velocity,V(figure 3-1) ft/s 7.22 11. T1=U(3600 V) Compute Tt hr 0.002 0.0021 - Shallow concentrated flow(continued) Segment ID 7. Surface description(paved or unpaved) 8. Flow length,L ft 9. Watercourse slope,s ft/ft - 10. Average velocity,V(figure 3-1) ft/s 11. Tt=U(3600 V) Compute It hr 0.0001 Channel flow Segment ID 12. Cross sectional flow area,a ftA2 13. Welted perimeter,pw ft - 14. Hydraulic radius,r=a/pw Compute r ft 15. Channel slope,s ft/ft 16. Manning's roughness coeff.,n 17. V=(1.49 rA(2/3)sA(1/2))/n Compute V ft/s 18. Flow length,L ft 19. It=L/(3600 V) Compute Tt hr 0.0001 - 20. Watershed or subarea Tc or Tt(add Tt in steps 6.11,and 19) lu{ 0.0191 (210-V I-TR-55,Second Ed.,June 1986) A tmp#16 .txt TR-55 Tabular Hydrograph Method Input Summary Description Developed Basin A 100 Rainfall Distribution Type II Ia/P Interpolation On Total Area 0 .6800 ac Peak Time 12 . 1000 hrs Peak Flow 3 .5096 cfs Given Input Data: Subarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) A 0.6800 84 0.1000 0.0000 5.0000 Support Data: Page 1 tmp#16 .txt TR-55 Tabular Data DEVELOPED BASIN A 100-YEAR HYDROGRAPH 11.0000 hrs 0.0834 cfs 11.3000 hrs 0.1181 cfs - 11.6000 hrs 0.1842 cfs 11.9000 hrs 1.1606 cfs 12.0000 hrs 2.2482 cfs 12.1000 hrs 3.5096 cfs - 12.2000 hrs 2.1822 cfs 12.3000 hrs 0.7540 cfs 12.4000 hrs 0.5108 cfs 12.5000 hrs 0.4274 cfs - 12.6000 hrs 0.3614 cfs 12.7000 hrs 0.2988 cfs 12.8000 hrs 0.2641 cfs 13 .0000 hrs 0.2293 cfs - 13 .2000 hrs 0.1981 cfs 13 .4000 hrs 0.1772 cfs 13 .6000 hrs 0 .1598 cfs 13.8000 hrs 0.1459 cfs - 14.0000 hrs 0.1320 cfs 14.3000 hrs 0.1181 cfs 14.6000 hrs 0.1112 cfs _ 15.0000 hrs 0.1008 cfs 15.5000 hrs 0.0903 cfs 16.0000 hrs 0.0799 cfs 16.5000 hrs 0.0730 cfs 17.0000 hrs 0.0695 cfs 17.5000 hrs 0.0660 cfs 18.0000 hrs 0.0625 cfs 19.0000 hrs 0.0521 cfs - 20.0000 hrs 0.0452 cfs 22.0000 hrs 0.0417 cfs 26.0000 hrs 0.0000 cfs Total Flow Values 11.0000 hrs 0.0834 cfs 11.3000 hrs 0.1181 cfs 11.6000 hrs 0.1842 cfs - 11.9000 hrs 1.1606 cfs 12.0000 hrs 2.2482 cfs 12.1000 hrs 3 .5096 cfs 12.2000 hrs 2.1822 cfs - 12.3000 hrs 0.7540 cfs 12.4000 hrs 0.5108 cfs 12.5000 hrs 0.4274 cfs 12.6000 hrs 0.3614 cfs 12.7000 hrs 0.2988 cfs 12 .8000 hrs 0.2641 cfs 13 .0000 hrs 0.2293 cfs 13 .2000 hrs 0.1981 cfs 13 .4000 hrs 0.1772 cfs 13 .6000 hrs 0.1598 cfs 13 .8000 hrs 0.1459 cfs 14.0000 hrs 0.1320 cfs 14.3000 hrs 0.1181 cfs 14.6000 hrs 0.1112 cfs Page 1 tmp#16.txt 15.0000 hrs 0.1008 cfs 15.5000 hrs 0.0903 cfs 16.0000 hrs 0.0799 cfs 16.5000 hrs 0.0730 cfs 17.0000 hrs 0.0695 cfs 17.5000 hrs 0.0660 cfs 18.0000 hrs 0.0625 cfs 19.0000 hrs 0.0521 cfs 20.0000 hrs 0.0452 cfs 22.0000 hrs 0.0417 cfs 26.0000 hrs 0.0000 cfs Peak Time and Flow 12.1000 hrs 3.5096 cfs Page 2 Problem 1-6 Worksheet for Trapezoidal Channel Project Description Worksheet Problem 1-6 - Flow Element Trapezoidal Cha Method Manning's Form, Solve For Discharge Input Data Mannings Coeffic 0.030 Slope 005000 ft/ft Depth 1.00 ft Left Side Slope 0.50 V: H Right Side Slope 0.50 V: H - Bottom Width 6.00 ft Results Discharge 23.41 cfs Flow Area 8.0 ft' Wetted Perim, 10.47 ft Top Width 10.00 ft Critical Depth 0.72 ft Critical Slope 0.016339 fUft Velocity 2.93 fUs - Velocity Head 0.13 ft Specific Enerc 1.13 ft Froude Numb 0.58 Flow Type 3ubcdtical c:\haestad\academic\fmw\tutorial.fm2 Academic Edition FlowMaster v6.0[614h] 08/30/00 10:31:10 AM C Haestad Methods, Inc. 37 Brookside Road Waterbury,CT 06708 USA (203)755-1666 Page 1 of 1 tmp#16.txt TR-55 Tabular Hydrograph Method Input Summary Description Developed Basin A 5 Rainfall Distribution Type II Ia/P Interpolation On Total Area 0. 6800 ac Peak Time 12 .1000 hrs -- Peak Flow 1.4332 cfs Given Input Data: - Subarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) A 0.6800 84 0.1000 0.0000 2.8000 Support Data: - Subarea Name: A, Row: 1 Page 1 tmp#16.txt TR-55 Tabular Data DEVELOPED BASIN A 5-YEAR HYDROGRAPH 11.0000 hrs 0.0283 cfs 11.3000 hrs 0.0401 cfs - 11.6000 hrs 0.0625 cfs 11.9000 hrs 0.4336 cfs 12 .0000 hrs 0.9099 cfs 12.1000 hrs 1.4332 cfs - 12.2000 hrs 0.8761 cfs 12.3000 hrs 0.3120 cfs 12.4000 hrs 0.2179 cfs 12.5000 hrs 0.1836 cfs - 12.6000 hrs 0.1553 cfs 12.7000 hrs 0.1291 cfs 12.8000 hrs 0.1147 cfs 13.0000 hrs 0.1001 cfs - 13.2000 hrs 0.0869 cfs 13 .4000 hrs 0.0780 cfs 13.6000 hrs 0.0706 cfs 13 .8000 hrs 0.0645 cfs 14.0000 hrs 0.0585 cfs 14.3000 hrs 0.0525 cfs 14 .6000 hrs 0.0496 cfs 15.0000 hrs 0.0451 cfs 15.5000 hrs 0.0405 cfs 16.0000 hrs 0.0359 cfs 16.5000 hrs 0.0328 cfs - 17.0000 hrs 0.0314 cfs 17.5000 hrs 0.0297 cfs 18.0000 hrs 0.0282 cfs 19.0000 hrs 0.0239 cfs - 20.0000 hrs 0.0205 cfs 22.0000 hrs 0.0191 cfs 26.0000 hrs 0.0000 cfs Total Flow Values 11.0000 hrs 0.0283 cfs 11.3000 hrs 0.0401 cfs 11.6000 hrs 0.0625 cfs - 11.9000 hrs 0.4336 cfs 12.0000 hrs 0.9099 cfs 12.1000 hrs 1.4332 cfs 12.2000 hrs 0.8761 cfs 12.3000 hrs 0.3120 cfs 12.4000 hrs 0.2179 cfs 12 .5000 hrs 0.1836 cfs 12.6000 hrs 0.1553 cfs 12.7000 hrs 0.1291 cfs 12.8000 hrs 0.1147 cfs 13.0000 hrs 0.1001 cfs - 13 .2000 hrs 0.0869 cfs 13.4000 hrs 0.0780 cfs 13.6000 hrs 0.0706 cfs 13 .8000 hrs 0.0645 cfs - 14.0000 hrs 0.0585 cfs 14.3000 hrs 0.0525 cfs 14.6000 hrs 0.0496 cfs Page 1 tmp#16.txt 15.0000 hrs 0.0451 cfs 15.5000 hrs 0.0405 cfs 16.0000 hrs 0.0359 cfs 16.5000 hrs 0.0328 cfs 17.0000 hrs 0.0314 cfs 17.5000 hrs 0.0297 cfs 18.0000 hrs 0.0282 cfs 19.0000 hrs 0.0239 cfs 20.0000 hrs 0.0205 cfs 22.0000 hrs 0.0191 cfs 26.0000 hrs 0.0000 cfs Peak Time and Flow 12.1000 hrs 1.4332 cfs Page 2 Developed Sub-basin B Ii DEVELOPED Tc Worksheet 3:Time of concentration(Tc)or travel time(Tt) Project: Lighthouse Cove By:jkd Date: 08/11/2000 Location: Weld County,Co Checked:jkd Date: 08/11/2000 DEVELOPEDTc%LS Condition: Developed Calculations for:Tc NOTES: Basin B Sheet Flow(Applicable to Tc only) Segment ID 1 1. Surface description(table 3-1) light 2. Manning's roughness coeff.,n(table 3-1) 0.015 3. Flow length,L(total L a 300 ft.) ft 107.2 4. Two-yr 24-hr rainfall,P2 in 2.1 5. Land slope,s ft/ft 0.0121 6. Tt=[0.007(nLY(0.8)14P2^(0.5)s^(0.4)1 Compute TL hr 0.04 0.041 Shallow concentrated flow Segment ID 2 7. Surface description(paved or unpaved) unpaved 8. Flow length,L ft 22 9. Watercourse slope,s ft/ft 0.27 10. Average velocity,V(figure 3-1) ft/s 8.38 11. Tt=L/(3600 V) Compute Tt hr 0.001 0.0011 Shallow concentrated flow(continued) Segment ID 7. Surface description(paved or unpaved) 8. Flow length,L ft 9. Watercourse slope,s ft/ft 10. Average velocity,V(figure 3-1) ft/s 11. It=L/(3600 V) Compute Tt hr o.000l Channel flow Segment ID 12. Cross sectional flow area,a ft^2 13. Wetted perimeter,pw ft 14. Hydraulic radius,r=a/pw Computer ft 15. Channel slope,s ft/ft 16. Manning's roughness coeff.,n 17. V=(1.49 r^(2/3)s^(1/2))/n Compute V ft/s 18. Flow length,L ft 19. Tt=L/(3600 V) Compute Tt hr 0.0001 20. Watershed or subarea Tc or TI(add Tt in steps 6,11.and 19) hr 0.042J (210-V1-TR-55,Second Ed.,June 1986) B tmp#16.txt TR-55 Tabular Hydrograph Method Input Summary Description Developed Basin B 100 Rainfall Distribution Type II Ia/P Interpolation On Total Area 1. 0700 ac Peak Time 12 .1000 hrs Peak Flow 5.5224 cfs Given Input Data: Subarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) B 1.0700 84 0. 1000 0.0000 5.0000 Support Data: Page 1 tmp#16.txt TR-55 Tabular Data DEVELOPED BASIN B 100-YEAR HYDROGRAPH 11.0000 hrs 0.1312 cfs 11.3000 hrs 0.1859 cfs - 11.6000 hrs 0.2898 cfs 11.9000 hrs 1.8262 cfs 12.0000 hrs 3 .5376 cfs 12.1000 hrs 5.5224 cfs - 12 .2000 hrs 3 .4337 cfs 12.3000 hrs 1.1865 cfs 12.4000 hrs 0.8038 cfs 12.5000 hrs 0.6725 cfs — 12.6000 hrs 0.5686 cfs 12.7000 hrs 0.4702 cfs 12.8000 hrs 0.4155 cfs 13 .0000 hrs 0.3609 cfs - 13 .2000 hrs 0.3117 cfs 13 .4000 hrs 0.2789 cfs 13.6000 hrs 0.2515 cfs 13.8000 hrs 0.2296 cfs - 14 .0000 hrs 0.2078 cfs 14 .3000 hrs 0.1859 cfs 14.6000 hrs 0.1750 cfs 15.0000 hrs 0.1586 cfs 15.5000 hrs 0.1422 cfs 16.0000 hrs 0.1258 cfs 16.5000 hrs 0.1148 cfs 17.0000 hrs 0.1094 cfs 17.5000 hrs 0.1039 cfs 18.0000 hrs 0.0984 cfs 19.0000 hrs 0.0820 cfs - 20.0000 hrs 0.0711 cfs 22 .0000 hrs 0.0656 cfs 26.0000 hrs 0.0000 cfs Total Flow Values 11.0000 hrs 0.1312 cfs 11.3000 hrs 0.1859 cfs 11.6000 hrs 0.2898 cfs - 11.9000 hrs 1.8262 cfs 12.0000 hrs 3 .5376 cfs 12.1000 hrs 5.5224 cfs 12.2000 hrs 3.4337 cfs - 12.3000 hrs 1.1865 cfs 12 .4000 hrs 0.8038 cfs 12.5000 hrs 0.6725 cfs _ 12.6000 hrs 0.5686 cfs 12.7000 hrs 0.4702 cfs 12.8000 hrs 0 .4155 cfs 13 .0000 hrs 0.3609 cfs 13 .2000 hrs 0.3117 cfs 13.4000 hrs 0.2789 cfs 13.6000 hrs 0.2515 cfs 13 .8000 hrs 0 .2296 cfs - 14 .0000 hrs 0.2078 cfs 14.3000 hrs 0.1859 cfs 14.6000 hrs 0.1750 cfs Page 1 tmp#16.txt 15.0000 hrs 0.1586 cfs 15.5000 hrs 0.1422 cfs 16.0000 hrs 0.1258 cfs 16.5000 hrs 0.1148 cfs 17.0000 hrs 0.1094 cfs 17.5000 hrs 0.1039 cfs 18.0000 hrs 0.0984 cfs 19.0000 hrs 0.0820 cfs 20.0000 hrs 0.0711 cfs 22.0000 hrs 0.O56 cfs 26 .0000 hrs 0.0000 cfs Peak Time and Flow 12 .1000 hrs 5.5224 cfs Page 2 tmp#16.txt TR-55 Tabular Hydrograph Method Input Summary '— Description Developed Basin B 5 Rainfall Distribution Type II Ia/P Interpolation On Total Area 1.0700 ac Peak Time 12.1000 hrs Peak Flow 2.2551 cfs Given Input Data: Subarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) B 1.0700 84 0.1000 0.0000 2.8000 Support Data: Page 1 tmp#16.txt TR-55 Tabular Data DEVELOPED BASIN B 5-YEAR HYDROGRAPH 11.0000 hrs 0.0445 cfs 11.3000 hrs 0.0631 cfs 11.6000 hrs 0.0983 cfs 11.9000 hrs 0.6823 cfs 12 .0000 hrs 1.4317 cfs 12.1000 hrs 2 .2551 cfs - 12.2000 hrs 1.3786 cfs 12.3000 hrs 0.4910 cfs 12.4000 hrs 0.3428 cfs 12 .5000 hrs 0.2889 cfs - 12.6000 hrs 0.2443 cfs 12.7000 hrs 0.2032 cfs 12.8000 hrs 0.1805 cfs 13 .0000 hrs 0. 1575 cfs - 13 .2000 hrs 0.1367 cfs 13.4000 hrs 0.1227 cfs 13.6000 hrs 0.1110 cfs 13 .8000 hrs 0.1016 cfs - 14.0000 hrs 0.0921 cfs 14.3000 hrs 0.0826 cfs 14.6000 hrs 0.0781 cfs 15.0000 hrs 0.0709 cfs 15.5000 hrs 0.0637 cfs 16.0000 hrs 0.0565 cfs 16.5000 hrs 0.0516 cfs 17.0000 hrs 0.0493 cfs 17.5000 hrs 0.0467 cfs 18.0000 hrs 0.0444 cfs 19.0000 hrs 0.0376 cfs - 20.0000 hrs 0.0323 cfs 22.0000 hrs 0.0300 cfs 26.0000 hrs 0.0000 cfs Total Flow Values 11.0000 hrs 0.0445 cfs 11.3000 hrs 0.0631 cfs 11.6000 hrs 0.0983 cfs - 11.9000 hrs 0.6823 cfs 12.0000 hrs 1.4317 cfs 12.1000 hrs 2.2551 cfs 12 .2000 hrs 1.3786 cfs - 12.3000 hrs 0.4910 cfs 12.4000 hrs 0.3428 cfs 12.5000 hrs 0.2889 cfs 12 .6000 hrs 0.2443 cfs 12.7000 hrs 0.2032 cfs 12.8000 hrs 0.1805 cfs 13 .0000 hrs 0.1575 cfs 13 .2000 hrs 0.1367 cfs 13.4000 hrs 0.1227 cfs 13 .6000 hrs 0.1110 cfs 13 .8000 hrs 0.1016 cfs - 14.0000 hrs 0.0921 cfs 14 .3000 hrs 0.0826 cfs 14 .6000 hrs 0.0781 cfs Page 1 tmp#16.txt 15.0000 hrs 0.0709 cfs 15.5000 hrs 0.0637 cfs 16.0000 hrs 0.0565 cfs 16.5000 hrs 0.0516 cfs 17.0000 hrs 0.0493 cfs 17.5000 hrs 0.0467 cfs 18.0000 hrs 0 . 0444 cfs 19.0000 hrs 0.0376 cfs 20.0000 hrs 0.0323 cfs 22.0000 hrs 0.0300 cfs 26.0000 hrs 0.0000 cfs Peak Time and Flow 12.1000 hrs 2 .2551 cfs Page 2 3di N�pp A� if Developed Sub-basin C if I I f V V 12 I DEVELOPED Tc Worksheet 3: Time of concentration(Tc)or travel time(Tt) Project: Lighthouse Cove By:jkd Date: 08/11/2000 Location: Weld County,Co Checked:jkd Date: 08/11/2000 DEVELOPEOTc.%LS Condition: Developed Calculations for:Tc NOTES: Basin C Sheet Flow(Applicable to Tc only) Segment ID 1 _. 1. Surface description(table 3-1) light 2. Manning's roughness coeff.,n(table 3-1) 0.015 3. Flow length,L(total L a 300 ft.) ft 66.9 4. Two-yr 24-hr rainfall,P2 in 2.1 5. Land slope,s ft/ft 0.0190 6. Tt=[0.007(nL)"(0.8)]/(P2"(0.5)s^(0.4)] Compute Tt hr 0.02 0.024 Shallow concentrated flow Segment ID 2 7. Surface description(paved or unpaved) unpaved 8. Flow length,L ft 37 9. Watercourse slope,s ft/ft 0.162 10. Average velocity,V(figure 3-1) ft/s 6.49 11. It=L(3600 V) Compute Tt hr 0.002 0.002( Shallow concentrated flow(continued) Segment ID 7. Surface description(paved or unpaved) 8. Flow length,L ft 9. Watercourse slope,s ft/ft 10. Average velocity,V(figure 3-1) ft/s 11. Tt=L/(3600 V) Compute Tt hr 0.0001 Channel flow Segment ID 12. Cross sectional flow area,a ft^2 13. Wetted perimeter,pw ft 14. Hydraulic radius,r=a/pw Computer ft 15. Channel slope,s fl/ft 16. Manning's roughness coeff.,n 17. V=(1.49 r"(2/3)s"(1/2))/n Compute V fVs 18. Flow length,L ft 19. Tt=U(3600 V) Compute Tt hr 0.0001 20. Watershed or subarea Tc or It(add Tt in steps 6,11,and 19) 0.0251 (210-V I-TR-55,Second Ed.,June 1986) C tmp#16.txt TR-55 Tabular Hydrograph Method Input Summary Description Developed Basin C 100 Rainfall Distribution Type II _ Ia/P Interpolation On Total Area 1.2700 ac Peak Time 12.1000 hrs Peak Flow 6.5546 cfs Given Input Data: Subarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) C 1.2700 84 0.1000 0.0000 5.0000 Support Data: Page 1 tmp#16.txt TR-55 Tabular Data - DEVELOPED BASIN C 100-YEAR HYDROGRAPH 11.0000 hrs 0.1558 cfs 11.3000 hrs 0.2207 cfs 11.6000 hrs 0.3440 cfs - 11.9000 hrs 2 .1676 cfs 12 .0000 hrs 4 .1989 cfs 12 .1000 hrs 6.5546 cfs 12.2000 hrs 4.0756 cfs 12.3000 hrs 1.4083 cfs 12.4000 hrs 0.9540 cfs 12.5000 hrs 0.7982 cfs 12.6000 hrs 0.6749 cfs 12.7000 hrs 0.5581 cfs 12.8000 hrs 0.4932 cfs 13.0000 hrs 0 .4283 cfs 13.2000 hrs 0.3699 cfs 13.4000 hrs 0.3310 cfs 13.6000 hrs 0.2985 cfs 13.8000 hrs 0.2726 cfs - 14.0000 hrs 0.2466 cfs 14.3000 hrs 0.2207 cfs 14.6000 hrs 0.2077 cfs 15.0000 hrs 0.1882 cfs - 15.5000 hrs 0.1687 cfs 16.0000 hrs 0.1493 cfs 16.5000 hrs 0.1363 cfs 17.0000 hrs 0.1298 cfs 17.5000 hrs 0.1233 cfs 18.0000 hrs 0.1168 cfs 19.0000 hrs 0.0973 cfs 20.0000 hrs 0.0844 cfs - 22.0000 hrs 0.0779 cfs 26.0000 hrs 0.0000 cfs Total Flow Values 11.0000 hrs 0.1558 cfs 11.3000 hrs 0.2207 cfs 11.6000 hrs 0.3440 cfs 11.9000 hrs 2. 1676 cfs 12.0000 hrs 4 .1989 cfs 12.1000 hrs 6 .5546 cfs 12.2000 hrs 4 .0756 cfs - 12.3000 hrs 1.4083 cfs 12.4000 hrs 0.9540 cfs 12.5000 hrs 0.7982 cfs 12.6000 hrs 0.6749 cfs - 12.7000 hrs 0.5581 cfs 12.8000 hrs 0 .4932 cfs 13.0000 hrs 0 .4283 cfs 13 .2000 hrs 0 .3699 cfs - 13.4000 hrs 0.3310 cfs 13 .6000 hrs 0.2985 cfs 13.8000 hrs 0.2726 cfs 14.0000 hrs 0.2466 cfs - 14.3000 hrs 0.2207 cfs 14.6000 hrs 0 .2077 cfs Page 1 tmp#16.txt 15.0000 hrs 0.1882 cfs 15.5000 hrs 0.1687 cfs 16.0000 hrs 0.1493 cfs 16.5000 hrs 0.1363 cfs 17.0000 hrs 0.1298 cfs 17.5000 hrs 0.1233 cfs 18 .0000 hrs 0.1168 cfs 19.0000 hrs 0.0973 cfs 20.0000 hrs 0.0844 cfs 22.0000 hrs 0.0779 cfs 26.0000 hrs 0.0000 cfs Peak Time and Flow 12.1000 hrs 6.5546 cfs Page 2 tmp#16.txt TR-55 Tabular Hydrograph Method Input Summary Description Developed Basin C 5 Rainfall Distribution Type II Ia/P Interpolation On Total Area 1.2700 ac Peak Time 12.1000 hrs Peak Flow 2.6767 cfs Given Input Data: Subarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) C 1.2700 84 0.1000 0.0000 2.8000 Support Data: Page 1 tmp#16.txt TR-55 Tabular Data DEVELOPED BASIN C 5-YEAR HYDROGRAPH 11.0000 hrs 0.0528 cfs 11.3000 hrs 0.0749 cfs 11.6000 hrs 0.1167 cfs 11.9000 hrs 0.8099 cfs 12.0000 hrs 1.6994 cfs 12.1000 hrs 2.6767 cfs 12.2000 hrs 1.6362 cfs 12 .3000 hrs 0.5828 cfs 12 .4000 hrs 0.4069 cfs 12.5000 hrs 0.3429 cfs 12.6000 hrs 0.2900 cfs 12.7000 hrs 0.2411 cfs 12 .8000 hrs 0.2143 cfs 13 .0000 hrs 0.1869 cfs - 13.2000 hrs 0.1623 cfs 13.4000 hrs 0.1457 cfs 13.6000 hrs 0.1318 cfs 13 .8000 hrs 0.1205 cfs — 14 .0000 hrs 0.1093 cfs 14 .3000 hrs 0.0981 cfs 14.6000 hrs 0.0927 cfs 15.0000 hrs 0.0842 cfs - 15.5000 hrs 0.0756 cfs 16.0000 hrs 0.0671 cfs 16.5000 hrs 0.0612 cfs 17.0000 hrs 0.0586 cfs - 17.5000 hrs 0.0554 cfs 18.0000 hrs 0.0527 cfs 19.0000 hrs 0.0446 cfs 20.0000 hrs 0.0383 cfs 22.0000 hrs 0.0356 cfs 26.0000 hrs 0.0000 cfs — Total Flow Values 11.0000 hrs 0.0528 cfs 11.3000 hrs 0.0749 cfs 11.6000 hrs 0.1167 cfs - 11.9000 hrs 0.8099 cfs 12.0000 hrs 1.6994 cfs 12.1000 hrs 2 .6767 cfs 12.2000 hrs 1.6362 cfs — 12.3000 hrs 0.5828 cfs 12.4000 hrs 0.4069 cfs 12.5000 hrs 0.3429 cfs 12.6000 hrs 0.2900 cfs - 12.7000 hrs 0.2411 cfs 12.8000 hrs 0 .2143 cfs 13.0000 hrs 0.1869 cfs 13.2000 hrs 0.1623 cfs - 13.4000 hrs 0.1457 cfs 13 .6000 hrs 0.1318 cfs 13 .8000 hrs 0.1205 cfs 14 .0000 hrs 0.1093 cfs 14.3000 hrs 0 .0981 cfs 14.6000 hrs 0.0927 cfs Page 1 tmp#16.txt 15.0000 hrs 0.0842 cfs 15.5000 hrs 0.0756 cfs 16.0000 hrs 0.0671 cfs 16.5000 hrs 0.0612 cfs 17.0000 hrs 0.0586 cfs 17.5000 hrs 0.0554 cfs 18.0000 hrs 0.0527 cfs 19.0000 hrs 0.0446 cfs 20.0000 hrs 0.0383 cfs 22.0000 hrs 0.0356 cfs 26.0000 hrs 0.0000 cfs Peak Time and Flow 12.1000 hrs 2 .6767 cfs Page 2 Developed Sub-basin D 13 DEVELOPED Tc Worksheet 3:Time of concentration (Tc)or travel time(Tt) Project: Lighthouse Cove By:jkd Date: 08/11/2000 Location: Weld County,Co Checked:jkd Date: 08/11/2000 DEVELOPEDTc.XLS _ Condition: Developed Calculations for:Tc NOTES: Basin D Sheet Flow(Applicable to Tc only) Segment ID 1 _ 1. Surface description(table 3-1) light 2. Manning's roughness coeff.,n(table 3-1) 0.015 3. Flow length,L(total L<=300 ft.) ft 215.89 4. Two-yr 24-hr rainfall,P2 in 2.1 5. Land slope,s ft/ft 0.0046 6. Tt=[0.007(nL)"(0.8)]/[P2"(0.5)s"(0.4)] Compute Tt hr 0.11 0.106 Shallow concentrated flow Segment ID 7. Surface description(paved or unpaved) unpaved 8. Flow length,L ft 9. Watercourse slope,s ft/ft 10. Average velocity,V(figure 3-1) N/s 11. Tt=U(3600 V) Compute Tt hr o.000) Shallow concentrated flow(continued) Segment ID 2 7. Surface description(paved or unpaved) unpaved 8. Flow length,L ft 48 9. Watercourse slope,s ft/ft 0.0379 10. Average velocity,V(figure 3.1) ft/s 3.14 11. Tt=U(3600 V) Compute Tt hr 0.004 0.004) Channel flow Segment ID 3.00 12. Cross sectional flow area,a ftA2 7.58 13. Wetted perimeter,pw ft 10.54 14. Hydraulic radius,r=a/pw Computer ft 0.72 15. Channel slope,s ft/ft 0.0100 16. Manning's roughness coeff.,n 0.04 17. V=(1.49 r^(2/3)s"(1/2))/n Compute V ft/s 1.28 18. Flow length,L ft 39 19. Tt=U(3600 V) Compute Tt hr 0.01 0.0081 - 20. Watershed or subarea Tc or Tt(add Tt in steps 6,11,and 19) 0.111 (210-V 1-TR-55,Second Ed.,June 1986) D tmp#16 .txt TR-55 Tabular Hydrograph Method Input Summary Description Developed Basin D 100 Rainfall Distribution Type II Ia/P Interpolation On Total Area 0.4500 ac Peak Time 12.1000 hrs Peak Flow 2.3225 cfs Given Input Data: Subarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) D 0.4500 84 0.1060 0.0000 5.0000 Support Data: Messages: Info: Time of Concentration rounded to 0.1000 hrs in row <1>. Page 1 top#16.txt TR-55 Tabular Data - DEVELOPED BASIN D 100-YEAR HYDROGRAPH 11.0000 hrs 0.0552 cfs 11.3000 hrs 0.0782 cfs 11.6000 hrs 0.1219 cfs 11. 9000 hrs 0.7680 cfs 12.0000 hrs 1 .4878 cfs 12. 1000 hrs 2.3225 cfs 12.2000 hrs 1.4441 cfs 12.3000 hrs 0.4990 cfs 12.4000 hrs 0.3380 cfs 12.5000 hrs 0.2828 cfs - 12.6000 hrs 0.2391 cfs 12.7000 hrs 0. 1978 cfs 12.8000 hrs 0.1748 cfs 13 .0000 hrs 0.1518 cfs - 13.2000 hrs 0. 1311 cfs 13 .4000 hrs 0. 1173 cfs 13 .6000 hrs 0.1058 cfs 13 .8000 hrs 0.0966 cfs - 14 .0000 hrs 0.0874 cfs 14 .3000 hrs 0.0782 cfs 14 .6000 hrs 0.0736 cfs 15.0000 hrs 0.0667 cfs - 15.5000 hrs 0.0598 cfs 16.0000 hrs 0.0529 cfs 16.5000 hrs 0.0483 cfs 17.0000 hrs 0.0460 cfs 17.5000 hrs 0.0437 cfs 18.0000 hrs 0.0414 cfs 19.0000 hrs 0.0345 cfs 20.0000 hrs 0 .0299 cfs 22.0000 hrs 0 .0276 cfs 26.0000 hrs 0 .0000 cfs Total Flow Values 11.0000 hrs 0.0552 cfs 11.3000 hrs 0.0782 cfs 11.6000 hrs 0.1219 cfs - 11.9000 hrs 0 .7680 cfs 12.0000 hrs 1 .4878 cfs 12.1000 hrs 2 .3225 cfs 12.2000 hrs 1 .4441 cfs - 12.3000 hrs 0.4990 cfs 12.4000 hrs 0.3380 cfs 12.5000 hrs 0.2828 cfs 12.6000 hrs 0.2391 cfs - 12.7000 hrs 0.1978 cfs 12.8000 hrs 0.1748 cfs 13.0000 hrs 0.1518 cfs 13.2000 hrs 0.1311 cfs 13.4000 hrs 0.1173 cfs 13.6000 hrs 0.1058 cfs 13.8000 hrs 0.0966 cfs 14 .0000 hrs 0.0874 cfs 14 .3000 hrs 0.0782 cfs 14 .6000 hrs 0 .0736 cfs Page 1 tmp#16.txt 15.0000 hrs 0.0667 cfs 15.5000 hrs 0.0598 cfs 16.0000 hrs 0.0529 cfs 16.5000 hrs 0.0483 cfs 17.0000 hrs 0.0460 cfs 17.5000 hrs 0.0437 cfs 18.0000 hrs 0.0414 cfs 19.0000 hrs 0.0345 cfs 20.0000 hrs 0.0299 cfs 22.0000 hrs 0.0276 cfs 26.0000 hrs 0.0000 cfs Peak Time and Flow 12 .1000 hrs 2 .3225 cfs Page 2 tmp#16.txt TR-55 Tabular Hydrograph Method Input Summary Description Developed Basin D 5 Rainfall Distribution Type II Ia/P Interpolation On Total Area 0.4500 ac Peak Time 12.1000 hrs Peak Flow 0. 9484 cfs Given Input Data: - Subarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) D 0.4500 84 0. 1060 0.0000 2.8000 Support Data: - Messages: Info: Time of Concentration rounded to 0. 1000 hrs in row <1>. Page 1 tmp#16.txt TR-55 Tabular Data - DEVELOPED BASIN D 5YEAR HYDROGRAPH 11.0000 hrs 0.0187 cfs 11.3000 hrs 0.0265 cfs 11.6000 hrs 0.0413 cfs - 11.9000 hrs 0.2870 cfs 12.0000 hrs 0.6021 cfs 12.1000 hrs 0.9484 cfs _ 12.2000 hrs 0.5798 cfs 12.3000 hrs 0.2065 cfs 12.4000 hrs 0.1442 cfs 12.5000 hrs 0.1215 cfs 12.6000 hrs 0.1027 cfs 12 .7000 hrs 0.0854 cfs 12 .8000 hrs 0.0759 cfs 13 .0000 hrs 0.0662 cfs - 13 .2000 hrs 0.0575 cfs 13 .4000 hrs 0.0516 cfs 13 .6000 hrs 0.0467 cfs 13 .8000 hrs 0.0427 cfs - 14 .0000 hrs 0.0387 cfs 14.3000 hrs 0.0348 cfs 14.6000 hrs 0.0329 cfs 15.0000 hrs 0.0298 cfs - 15.5000 hrs 0.0268 cfs 16.0000 hrs 0.0238 cfs 16.5000 hrs 0.0217 cfs 17.0000 hrs 0.0207 cfs - 17.5000 hrs 0.0196 cfs 18.0000 hrs 0.0187 cfs 19.0000 hrs 0.0158 cfs 20.0000 hrs 0.0136 cfs - 22.0000 hrs 0.0126 cfs 26.0000 hrs 0.0000 cfs _ Total Flow Values 11.0000 hrs 0.0187 cfs 11.3000 hrs 0.0265 cfs 11.6000 hrs 0.0413 cfs —, 11.9000 hrs 0.2870 cfs 12.0000 hrs 0.6021 cfs 12.1000 hrs 0.9484 cfs 12 .2000 hrs 0.5798 cfs - 12 .3000 hrs 0.2065 cfs 12.4000 hrs 0. 1442 cfs 12.5000 hrs 0. 1215 cfs 12.6000 hrs 0.1027 cfs - 12.7000 hrs 0.0854 cfs 12.8000 hrs 0.0759 cfs 13.0000 hrs 0.0662 cfs 13.2000 hrs 0.0575 cfs - 13.4000 hrs 0.0516 cfs 13 .6000 hrs 0.0467 cfs 13.8000 hrs 0.0427 cfs 14 .0000 hrs 0.0387 cfs - 14.3000 hrs 0.0348 cfs 14.6000 hrs 0.0329 cfs Page 1 tmp#16.txt 15.0000 hrs 0.0298 cfs 15.5000 hrs 0.0268 cfs 16.0000 hrs 0.0238 cfs - 16.5000 hrs 0.0217 cfs 17.0000 hrs 0.0207 cfs 17.5000 hrs 0.0196 cfs 18.0000 hrs 0.0187 cfs - 19.0000 hrs 0.0158 cfs 20.0000 hrs 0.0136 cfs 22 .0000 hrs 0.0126 cfs 26 .0000 hrs 0.0000 cfs Peak Time and Flow 12.1000 hrs 0.9484 cfs Page 2 Developed Sub-basin E 14 DEVELOPED Tc Worksheet 3: Time of concentration(Tc)or travel time(Tt) Project: Lighthouse Cove By: jkd Date: 08/11/2000 Location: Weld County,Co Checked: jkd Date: 08/11/2000 DEVELOPEDTc.XLS Condition: Developed Calculations for:Tc NOTES: Basin E Sheet Flow(Applicable to Tc only) Segment ID 1. Surface description(table 3-1) light 2. Manning's roughness coeff.,n(table 3-1) 0.013 3. Flow length,L(total L<=300 ft.) ft 300 4. Two-yr 24-hr rainfall,P2 in- 2.1 5. Land slope,s ft/ft 0.0056 6. Tt=(0.007(ny^(0.8)l/(P2^(0.5)s^(0.4)] Compute Tt hr 0.11 0.114 Shallow concentrated flow Segment ID 2 7. Surface description(paved or unpaved) unpaved 8. Flow length,L ft 225 9. Watercourse slope,s fl/ft 0.002222 10. Average velocity,V(figure 3-1) ft/s 0.76 11. Tt=L/(3600 V) Compute Tt hr 0.082 0.0821 Shallow concentrated flow(continued) Segment ID • 7. Surface description(paved or unpaved) 8. Flow length,L ft 9. Watercourse slope,s ft/ft 10. Average velocity,V(figure 3-1) ft/s 11. Tt=LI(3600 V) Compute Tt hr 0.0001 Channel flow Segment ID 3.00 12. Cross sectional flow area,a ft^2 13. Welted perimeter,pw ft 14. Hydraulic radius,r=a/pw Computer ft 15. Channel slope,s Wft 16. Manning's roughness coeff.,n 17. V=(1.49 0(2/3)s^(1/2))/n Compute V ft/s 18. Flow length,L ft 19. It=L/(3600 V) Compute Tt hr 0.0001 20. Watershed or subarea Tc or Tt(add Tt in steps 6,11,and 19) h 0.196 (210-V I-TR-55,Second Ed.,June 1986) E tmp#16.txt TR-55 Tabular Hydrograph Method Input Summary Description Developed Basin E 100 Rainfall Distribution Type II _ Ia/P Interpolation On Total Area 4.8300 ac Peak Time 12.1000 hrs Peak Flow 14.4840 cfs Given Input Data: - Subarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) E 4.8300 69 0.1140 0.0000 5.0000 Support Data: - Messages: Info: Time of Concentration rounded to 0.1000 hrs in row <1>. Page 1 tmp#16.txt TR-55 Tabular Data - DEVELOPED BASIN E 100-YEAR HYDROGRAPH 11.0000 hrs 0.2132 cfs 11.3000 hrs 0.3021 cfs 11.6000 hrs 0.4709 cfs 11.9000 hrs 3 .8741 cfs 12 .0000 hrs 9.0923 cfs 12.1000 hrs 14 .4840 cfs — 12.2000 hrs 8.6645 cfs 12.3000 hrs 3.2055 cfs 12 .4000 hrs 2.3187 cfs 12.5000 hrs 1.9700 cfs 12.6000 hrs 1.6658 cfs 12 .7000 hrs 1.3940 cfs 12.8000 hrs 1.2463 cfs 13 .0000 hrs 1.0927 cfs - 13 .2000 hrs 0. 9539 cfs 13 .4000 hrs 0.8593 cfs 13.6000 hrs 0.7796 cfs 13 .8000 hrs 0.7146 cfs - 14 .0000 hrs 0.6496 cfs 14.3000 hrs 0.5847 cfs 14 .6000 hrs 0.5551 cfs 15.0000 hrs 0.5049 cfs - 15.5000 hrs 0.4547 cfs 16.0000 hrs 0.4045 cfs 16.5000 hrs 0.3691 cfs 17.0000 hrs 0.3543 cfs - 17.5000 hrs 0.3337 cfs 18.0000 hrs 0.3189 cfs 19.0000 hrs 0.2746 cfs 20.0000 hrs 0.2332 cfs 22.0000 hrs 0.2185 cfs 26.0000 hrs 0.0000 cfs Total Flow Values 11.0000 hrs 0.2132 cfs 11.3000 hrs 0.3021 cfs 11.6000 hrs 0.4709 cfs 11.9000 hrs 3.8741 cfs 12.0000 hrs 9.0923 cfs 12.1000 hrs 14 .4840 cfs 12.2000 hrs 8.6645 cfs - 12 .3000 hrs 3 .2055 cfs 12 .4000 hrs 2.3187 cfs 12.5000 hrs 1.9700 cfs 12.6000 hrs 1.6658 cfs - 12.7000 hrs 1.3940 cfs 12.8000 hrs 1.2463 cfs 13 .0000 hrs 1.0927 cfs 13 .2000 hrs 0.9539 cfs - 13.4000 hrs 0.8593 cfs 13 .6000 hrs 0.7796 cfs 13 .8000 hrs 0.7146 cfs 14 .0000 hrs 0.6496 cfs - 14 .3000 hrs 0.5847 cfs 14.6000 hrs 0.5551 cfs Page 1 tmp#16.txt 15.0000 hrs 0.5049 cfs 15.5000 hrs 0.4547 cfs 16.0000 hrs 0.4045 cfs 16.5000 hrs 0.3691 cfs 17.0000 hrs 0.3543 cfs 17.5000 hrs 0.3337 cfs 18.0000 hrs 0.3189 cfs 19.0000 hrs 0.2746 cfs 20 .0000 hrs 0.2332 cfs 22.0000 hrs 0.2185 cfs 26.0000 hrs 0.0000 cfs Peak Time and Flow 12.1000 hrs 14 .4840 cfs Page 2 tmp#16.txt TR-55 Tabular Hydrograph Method Input Summary Description Developed Basin E 5 Rainfall Distribution Type II Ia/P Interpolation On Total Area 4.8300 ac Peak Time 12.1000 hrs Peak Flow 3 .8170 cfs Given Input Data: Subarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) E 4.8300 69 0.1140 0.0000 2.8000 Support Data: Messages: Info: Time of Concentration rounded to 0.1000 hrs in row <1>. Page 1 tmp#16.txt TR-55 Tabular Data DEVELOPED BASIN E 5-YEAR HYDROGRAPH 11.0000 hrs 0.0000 cfs 11.3000 hrs 0.0000 cfs _ 11.6000 hrs 0.0000 cfs 11. 9000 hrs 0.5885 cfs 12.0000 hrs 2.2016 cfs 12.1000 hrs 3 .8170 cfs 12.2000 hrs 2.1705 cfs 12 .3000 hrs 0.9166 cfs 12 .4000 hrs 0.7335 cfs 12 .5000 hrs 0.6381 cfs - 12 .6000 hrs 0.5412 cfs 12.7000 hrs 0.4611 cfs 12 .8000 hrs 0.4188 cfs 13.0000 hrs 0.3728 cfs - 13.2000 hrs 0.3301 cfs 13.4000 hrs 0.3007 cfs 13 .6000 hrs 0.2751 cfs 13 .8000 hrs 0.2537 cfs - 14.0000 hrs 0.2324 cfs 14.3000 hrs 0.2106 cfs 14 .6000 hrs 0.2021 cfs 15.0000 hrs 0.1855 cfs - 15.5000 hrs 0.1680 cfs 16.0000 hrs 0.1504 cfs 16.5000 hrs 0.1376 cfs 17.0000 hrs 0.1334 cfs 17.5000 hrs 0.1248 cfs 18.0000 hrs 0.1201 cfs 19.0000 hrs 0.1069 cfs 20.0000 hrs 0.0898 cfs 22.0000 hrs 0.0851 cfs 26.0000 hrs 0.0000 cfs Total Flow Values 11.0000 hrs 0.0000 cfs 11.3000 hrs 0.0000 cfs 11.6000 hrs 0.0000 cfs --. 11.9000 hrs 0.5885 cfs 12.0000 hrs 2.2016 cfs 12.1000 hrs 3.8170 cfs 12.2000 hrs 2.1705 cfs - 12.3000 hrs 0.9166 cfs 12.4000 hrs 0.7335 cfs 12.5000 hrs 0.6381 cfs 12.6000 hrs 0.5412 cfs - 12.7000 hrs 0.4611 cfs 12.8000 hrs 0.4188 cfs 13 .0000 hrs 0.3728 cfs 13 .2000 hrs 0.3301 cfs 13 .4000 hrs 0.3007 cfs 13 .6000 hrs 0.2751 cfs 13 .8000 hrs 0.2537 cfs 14 .0000 hrs 0.2324 cfs 14 .3000 hrs 0.2106 cfs 14 .6000 hrs 0.2021 cfs Page 1 — tmp#16 .txt 15.0000 hrs 0.1855 cfs 15.5000 hrs 0.1680 cfs 16.0000 hrs 0.1504 cfs — 16.5000 hrs 0.1376 cfs 17.0000 hrs 0.1334 cfs 17.5000 hrs 0.1248 cfs 18 .0000 hrs 0. 1201 cfs - 19.0000 hrs 0. 1069 cfs 20.0000 hrs 0.0898 cfs 22.0000 hrs 0.0851 cfs 26.0000 hrs 0.0000 cfs Peak Time and Flow 12 .1000 hrs 3 .8170 cfs Page 2 Developed Sub-basin F I I 15 I DEVELOPED Tc Worksheet 3: Time of concentration(Tc)or travel time(Tt) Project: Lighthouse Cove By:jkd Date: 08/11/2000 Location: Weld County,Co Checked:jkd Date: 08/11/2000 DEVELOGEDTc.XLS Condition: Developed Calculations for:Tc NOTES: Basin F Sheet Flow(Applicable to Tc only) Segment ID 1. Surface description(table 3-1) light 2. Manning's roughness coeff.,n(table 3-1) 0.015 3. Flow length,L(total L<=300 ft.) ft 58.73 4. Two-yr 24-hr rainfall,P2 in 2.1 5. Land slope,s ft/ft 0.0155 6. Tt=[0.007(nL)^(0.8)14P2^(0.5)s^(0.4)] Compute It hr 0.02 0.023 Shallow concentrated flow Segment ID 2 7. Surface description(paved or unpaved) unpaved 8. Flow length,L ft 26 9. Watercourse slope,s ft/ft 0.1425 10. Average velocity,V(figure 3-1) ft/s 6.09 11. TI=11(3600 V) Compute Tt hr 0.001 0.0011 - Shallow concentrated flow(continued) Segment ID 7. Surface description(paved or unpaved) 8. Flow length,L ft 9. Watercourse slope,s ft/ft - 10. Average velocity,V(figure 3-1) ft/s 11. Tt=U(3600 V) Compute Tt hr 0.0001 Channel flow Segment ID 3 12. Cross sectional flow area,a ft^2 7.58 13. Wetted perimeter,pw ft 10.54 - 14. Hydraulic radius,r=a/pw Computer ft 0.72 15. Channel slope,s ft/ft 0.0012 16. Manning's roughness coeff.,n 0.04 17. V=(1.49 r^(2/3)s^(1/2)yn Compute V ft/s 1.28 18. Flow length,L ft 330 19. Tt=U(3600 V) Compute Tt hr 0.07 0.0721 - 20. Watershed or subarea Tc or Tt(add Tt in steps 6,11,and 19) (210-V I-TR-55,Second Ed.,June 1986) F tmp#16.txt TR-55 Tabular Hydrograph Method Input Summary -- Description Developed Basin F 100 Rainfall Distribution Type II Ia/P Interpolation On Total Area 0.7200 ac Peak Time 12.1000 hrs Peak Flow 3.7160 cfs Given Input Data: _ Subarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) F 0.7200 84 0.1000 0.0000 5.0000 Support Data: Page 1 tmp#16 .txt TR-55 Tabular Data DEVELOPED BASIN F 100-YEAR HYDROGRAPH 11.0000 hrs 0.0883 cfs 11.3000 hrs 0.1251 cfs 11.6000 hrs 0.1950 cfs 11.9000 hrs 1.2289 cfs 12 .0000 hrs 2 .3805 cfs 12 .1000 hrs 3.7160 cfs 12 .2000 hrs 2.3106 cfs 12.3000 hrs 0.7984 cfs 12.4000 hrs 0.5408 cfs 12.5000 hrs 0.4525 cfs 12 .6000 hrs 0.3826 cfs 12 .7000 hrs 0.3164 cfs 12.8000 hrs 0.2796 cfs 13 .0000 hrs 0.2428 cfs 13 .2000 hrs 0.2097 cfs 13 .4000 hrs 0.1876 cfs 13 .6000 hrs 0. 1692 cfs 13 .8000 hrs 0.1545 cfs - 14.0000 hrs 0 . 1398 cfs 14.3000 hrs 0. 1251 cfs 14.6000 hrs 0.1177 cfs 15.0000 hrs 0.1067 cfs 15.5000 hrs 0.0957 cfs 16.0000 hrs 0.0846 cfs 16.5000 hrs 0.0773 cfs 17.0000 hrs 0.0736 cfs 17.5000 hrs 0.0699 cfs 18.0000 hrs 0.0662 cfs 19.0000 hrs 0.0552 cfs 20.0000 hrs 0.0478 cfs 22.0000 hrs 0.0442 cfs 26.0000 hrs 0.0000 cfs Total Flow Values 11.0000 hrs 0.0883 cfs 11.3000 hrs 0.1251 cfs 11.6000 hrs 0.1950 cfs 11.9000 hrs 1.2289 cfs 12.0000 hrs 2.3805 cfs 12.1000 hrs 3 .7160 cfs 12.2000 hrs 2 .3106 cfs - 12.3000 hrs 0.7984 cfs 12.4000 hrs 0.5408 cfs 12.5000 hrs 0.4525 cfs 12.6000 hrs 0.3826 cfs - 12.7000 hrs 0.3164 cfs 12.8000 hrs 0.2796 cfs 13.0000 hrs 0.2428 cfs 13.2000 hrs 0.2097 cfs 13.4000 hrs 0.1876 cfs 13.6000 hrs 0.1692 cfs 13 .8000 hrs 0.1545 cfs 14 .0000 hrs 0. 1398 cfs 14 .3000 hrs 0. 1251 cfs 14 .6000 hrs 0. 1177 cfs Page 1 tmp#16.txt 15.0000 hrs 0.1067 cfs 15.5000 hrs 0.0957 cfs 16.0000 hrs 0.0846 cfs 16.5000 hrs 0.0773 cfs 17.0000 hrs 0.0736 cfs 17.5000 hrs 0.0699 cfs 18.0000 hrs 0.0662 cfs 19.0000 hrs 0.0552 cfs 20.0000 hrs 0.0478 cfs 22.0000 hrs 0.0442 cfs 26.0000 hrs 0.0000 cfs Peak Time and Flow 12.1000 hrs 3 .7160 cfs Page 2 tmp#16.txt TR-55 Tabular Hydrograph Method Input Summary Description Developed Basin F 5 Rainfall Distribution Type II Ia/P Interpolation On Total Area 0.7200 ac Peak Time 12 .1000 hrs Peak Flow 1.5175 cfs Given Input Data: _ Subarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) F 0.7200 84 0.1000 0.0000 2.8000 Support Data: Page 1 tmp#16.txt TR-55 Tabular Data - DEVELOPED BASIN F 5-YEAR HYDROGRAPH 11.0000 hrs 0.0300 cfs 11.3000 hrs 0.0424 cfs 11.6000 hrs 0.0661 cfs —. 11.9000 hrs 0.4591 cfs 12.0000 hrs 0.9634 cfs 12 .1000 hrs 1.5175 cfs 12.2000 hrs 0. 9276 cfs 12 .3000 hrs 0.3304 cfs 12.4000 hrs 0.2307 cfs 12 .5000 hrs 0.1944 cfs 12.6000 hrs 0. 1644 cfs 12 .7000 hrs 0.1367 cfs 12.8000 hrs 0. 1215 cfs 13 .0000 hrs 0. 1060 cfs 13.2000 hrs 0.0920 cfs 13.4000 hrs 0.0826 cfs 13 .6000 hrs 0.0747 cfs 13.8000 hrs 0. 0683 cfs 14 .0000 hrs 0.0620 cfs 14.3000 hrs 0.0556 cfs 14 .6000 hrs 0.0526 cfs 15.0000 hrs 0.0477 cfs - 15.5000 hrs 0.0429 cfs 16.0000 hrs 0.0380 cfs 16.5000 hrs 0.0347 cfs 17.0000 hrs 0.0332 cfs - 17.5000 hrs 0.0314 cfs 18.0000 hrs 0.0299 cfs 19.0000 hrs 0.0253 cfs 20.0000 hrs 0.0217 cfs 22.0000 hrs 0.0202 cfs 26.0000 hrs 0.0000 cfs Total Flow Values - 11.0000 hrs 0.0300 cfs 11.3000 hrs 0.0424 cfs 11.6000 hrs 0.0661 cfs 11.9000 hrs 0.4591 cfs 12.0000 hrs 0.9634 cfs 12.1000 hrs 1.5175 cfs 12.2000 hrs 0.9276 cfs 12.3000 hrs 0.3304 cfs 12.4000 hrs 0 .2307 cfs 12.5000 hrs 0.1944 cfs 12.6000 hrs 0.1644 cfs - 12.7000 hrs 0.1367 cfs 12.8000 hrs 0.1215 cfs 13.0000 hrs 0.1060 cfs 13 .2000 hrs 0.0920 cfs - 13 .4000 hrs 0.0826 cfs 13.6000 hrs 0.0747 cfs 13 .8000 hrs 0.0683 cfs 14 .0000 hrs 0.0620 cfs - 14.3000 hrs 0.0556 cfs 14.6000 hrs 0 .0526 cfs Page 1 tmp#16.txt 15.0000 hrs 0.0477 cfs 15.5000 hrs 0.0429 cfs 16.0000 hrs 0.0380 cfs 16.5000 hrs 0.0347 cfs 17.0000 hrs 0.0332 cfs 17.5000 hrs 0.0314 cfs 18.0000 hrs 0.0299 cfs 19.0000 hrs 0.0253 cfs 20.0000 hrs 0.0217 cfs 22 .0000 hrs 0.0202 cfs 26.0000 hrs 0.0000 cfs Peak Time and Flow 12 .1000 hrs 1.5175 cfs Page 2 Developed Sub-basin G 16 DEVELOPED Tc Worksheet 3: Time of concentration (Tc)or travel time(Tt) Project: Lighthouse Cove By: jkd Date: 08/11/2000 Location: Weld County,Co Checked: jkd Date: 08/11/2000 DEVELOPEDTc.XLS _ Condition: Developed Calculations for:Tc NOTES: Basin G Sheet Flow(Applicable to Tc only) Segment ID 1 1. Surface description(table 3-1) light 2. Manning's roughness coeff.,n(table 3-1) 0.015 3. Flow length,L(total L<=300 ft.) ft 74 4. Two-yr 24-hr rainfall,P2 in 2.1 5. Land slope,s ft/ft 0.0351 6. Tt=[0.007(nL)A(0.8)]/[P2A(0.5)sA(0.4)) Compute Tt hr 0.02 0.020 Shallow concentrated flow Segment ID 2 7. Surface description(paved or unpaved) unpaved 8. Flow length,L ft 74 9. Watercourse slope,s ft/ft 0.0351 10. Average velocity,V(figure 3-1) ft/s 3.02 11. Tt=L/(3600 V) Compute Tt hr 0.007 0.0071 Shallow concentrated flow(continued) Segment ID 7. Surface description(paved or unpaved) 8. Flow length,L ft 9. Watercourse slope,s ft/ft 10. Average velocity,V(figure 3-1) ft/s 11. TI=LJ(3600 V) Compute TI hr o.000l Channel flow Segment ID 3 12. Cross sectional flow area,a ft^2 7.58 13. Wetted perimeter,pw ft 10.54 - 14. Hydraulic radius,r=a/pw Computer ft 0.72 15. Channel slope,s ft/ft 0.0008 16. Manning's roughness coeff.,n 0.04 17. V=(1.49 rA(2/3)sA(1/2))/n Compute V ft/s 1.28 18. Flow length,L ft 429 19. Tt=L/(3600 V) Compute Tt hr 0.09 0.0931 - 20. Watershed or subarea Tc or Tt(add TI In steps 6,11,and 19) (210-V I-TR-55,Second Ed.,June 1986) G tmp#16.txt TR-55 Tabular Hydrograph Method Input Summary Description Developed Basin G 100 Rainfall Distribution Type II _ Ia/P Interpolation On Total Area 1.3400 ac Peak Time 12.1000 hrs _ Peak Flow 6.9159 cfs Given Input Data: Subarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) G 1.3400 84 0.1000 0.0000 5.0000 Support Data: Page 1 tmp#16.txt TR-55 Tabular Data DEVELOPED BASIN G 100-YEAR HYDROGRAPH 11 .0000 hrs 0.1643 cfs 11.3000 hrs 0 .2328 cfs 11.6000 hrs 0.3629 cfs 11. 9000 hrs 2.2870 cfs 12 .0000 hrs 4.4303 cfs 12 .1000 hrs 6. 9159 cfs 12 .2000 hrs 4 .3002 cfs 12 .3000 hrs 1.4859 cfs 12.4000 hrs 1.0066 cfs 12.5000 hrs 0 . 8422 cfs - 12.6000 hrs 0 .7121 cfs 12.7000 hrs 0. 5889 cfs 12 .8000 hrs 0.5204 cfs 13 .0000 hrs 0.4519 cfs - 13 .2000 hrs 0.3903 cfs 13 .4000 hrs 0.3492 cfs 13.6000 hrs 0.3150 cfs 13.8000 hrs 0 .2876 cfs - 14.0000 hrs 0 .2602 cfs 14 .3000 hrs 0.2328 cfs 14 .6000 hrs 0.2191 cfs 15 .0000 hrs 0.1986 cfs - 15 .5000 hrs 0.1780 cfs 16.0000 hrs 0. 1575 cfs 16.5000 hrs 0. 1438 cfs 17.0000 hrs 0.1369 cfs 17.5000 hrs 0.1301 cfs 18.0000 hrs 0.1233 cfs 19.0000 hrs 0.1027 cfs 20.0000 hrs 0.0890 cfs 22 . 0000 hrs 0 .0822 cfs 26.0000 hrs 0 .0000 cfs Total Flow Values 11.0000 hrs 0.1643 cfs 11.3000 hrs 0.2328 cfs 11.6000 hrs 0.3629 cfs - 11.9000 hrs 2 .2870 cfs 12 .0000 hrs 4 .4303 cfs 12 .1000 hrs 6 .9159 cfs 12.2000 hrs 4 .3002 cfs - 12.3000 hrs 1.4859 cfs 12.4000 hrs 1.0066 cfs 12.5000 hrs 0.8422 cfs 12.6000 hrs 0.7121 cfs - 12.7000 hrs 0.5889 cfs 12.8000 hrs 0.5204 cfs 13 .0000 hrs 0.4519 cfs 13 .2000 hrs 0.3903 cfs 13 .4000 hrs 0.3492 cfs 13 .6000 hrs 0.3150 cfs 13 .8000 hrs 0.2876 cfs 14 .0000 hrs 0.2602 cfs 14 .3000 hrs 0.2328 cfs 14 .6000 hrs 0.2191 cfs Page 1 tmp#16 .txt 15.0000 hrs 0. 1986 cfs 15.5000 hrs 0.1780 cfs 16.0000 hrs 0.1575 cfs 16.5000 hrs 0.1438 cfs 17.0000 hrs 0. 1369 cfs 17.5000 hrs 0 . 1301 cfs 18.0000 hrs 0.1233 cfs 19.0000 hrs 0.1027 cfs 20.0000 hrs 0. 0890 cfs 22 .0000 hrs 0.0822 cfs 26.0000 hrs 0.0000 cfs Peak Time and Flow 12 .1000 hrs 6 .9159 cfs Page 2 tmp#16.txt TR-55 Tabular Hydrograph Method Input Summary Description Developed Basin G 5 Rainfall Distribution Type II Ia/P Interpolation On Total Area 1.3400 ac Peak Time 12.1000 hrs Peak Flow 2.8242 cfs Given Input Data: Subarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) G 1.3400 84 0. 1000 0.0000 2.8000 Support Data: Page 1 tmp#16.txt TR-55 Tabular Data DEVELOPED BASIN G 5-YEAR HYDROGRAPH 11.0000 hrs 0.0557 cfs 11.3000 hrs 0.0790 cfs 11.6000 hrs 0.1231 cfs 11.9000 hrs 0.8545 cfs 12 .0000 hrs 1 .7930 cfs 12 .1000 hrs 2 .8242 cfs - 12.2000 hrs 1.7264 cfs 12.3000 hrs 0.6149 cfs 12.4000 hrs 0.4293 cfs 12 .5000 hrs 0.3618 cfs - 12.6000 hrs 0.3059 cfs 12 .7000 hrs 0.2544 cfs 12.8000 hrs 0.2261 cfs 13.0000 hrs 0.1972 cfs — 13.2000 hrs 0.1712 cfs 13 .4000 hrs 0.1537 cfs 13 .6000 hrs 0.1390 cfs 13 .8000 hrs 0.1272 cfs 14.0000 hrs 0.1153 cfs 14 .3000 hrs 0.1035 cfs 14.6000 hrs 0.0978 cfs 15.0000 hrs 0.0888 cfs 15.5000 hrs 0.0798 cfs 16.0000 hrs 0.0708 cfs 16.5000 hrs 0.0646 cfs 17.0000 hrs 0.0618 cfs 17.5000 hrs 0.0584 cfs 18.0000 hrs 0.0556 cfs 19.0000 hrs 0.0471 cfs 20.0000 hrs 0.0404 cfs 22.0000 hrs 0.0376 cfs 26.0000 hrs 0.0000 cfs Total Flow Values 11.0000 hrs 0.0557 cfs 11.3000 hrs 0.0790 cfs 11.6000 hrs 0.1231 cfs - 11.9000 hrs 0 .8545 cfs 12.0000 hrs 1.7930 cfs 12.1000 hrs 2.8242 cfs 12.2000 hrs 1.7264 cfs - 12.3000 hrs 0.6149 cfs 12.4000 hrs 0.4293 cfs 12.5000 hrs 0.3618 cfs _ 12.6000 hrs 0.3059 cfs 12.7000 hrs 0.2544 cfs 12.8000 hrs 0.2261 cfs 13.0000 hrs 0.1972 cfs 13.2000 hrs 0.1712 cfs 13.4000 hrs 0.1537 cfs 13.6000 hrs 0.1390 cfs 13.8000 hrs 0.1272 cfs 14.0000 hrs 0.1153 cfs 14.3000 hrs 0 .1035 cfs 14.6000 hrs 0.0978 cfs Page 1 tmp#16 .txt 15.0000 hrs 0.0888 cfs 15.5000 hrs 0.0798 cfs 16.0000 hrs 0 .0708 cfs 16.5000 hrs 0. 0646 cfs 17.0000 hrs 0.0618 cfs 17.5000 hrs 0.0584 cfs 18.0000 hrs 0.0556 cfs 19.0000 hrs 0.0471 cfs 20.0000 hrs 0.0404 cfs 22.0000 hrs 0.0376 cfs 26.0000 hrs 0.0000 cfs Peak Time and Flow 12 .1000 hrs 2.8242 cfs Page 2 Developed Sub-basin H 17 DEVELOPED To Worksheet 3: Time of concentration(Tc)or travel time(Tt) Project: Lighthouse Cove By:jkd Date: 08/11/2000 Location: Weld County,Co Checked:jkd Date: 08/11/2000 DEVELOPEDTc.XLS Condition: Developed Calculations for:Tc NOTES: Basin H Sheet Flow(Applicable to Tc only) Segment ID 1 1. Surface description(table 3-1) light 2. Manning's roughness coefl.,n(table 3-1) 0.015 3. Flow length,L(total L<=300 ft.) ft 84 4. Two-yr 24-hr rainfall,P2 in 2.1 5. Land slope,s ft/fl 0.0130 6. Tt=[0.007(nL)"(0.8)]/[P2"(0.5)s"(0.4)1 Compute Tt hr 0.03 0.033 Shallow concentrated flow Segment ID 2 7. Surface description(paved or unpaved) unpaved 8. Flow length,L ft 24 9. Watercourse slope,s ft/ft 0.0729 10. Average velocity,V(figure 3-1) R/s 4.36 11. Tt=U(3600 V) Compute Tt hr 0.002 0.0021 — Shallow concentrated flow(continued) Segment ID 7. Surface description(paved or unpaved) 8. Flow length,L ft 9. Watercourse slope,s Ij/ft 10. Average velocity,V(figure 3-1) ft/s 11. Tt=U(3600 V) Compute It hr 0.0001 Channel flow Segment ID 3 12. Cross sectional flow area,a ftA2 7.58 13. Wetted perimeter,pw ft 10.54 14. Hydraulic radius,r=a/pw Compute r ft 0.72 15. Channel slope,s ft/ft 0.0011 16. Manning's roughness coeff.,n 0.04 17. V=(1.49 0(2/3)s"(1/2)yn Compute V ft/s 1.28 18. Flow length,L ft 429 19. Tt=U(3600 V) Compute Tt hr 0.09 0.0931 20. Watershed or subarea Tc or Tt(add Tt in steps 6.11,and 19) hrjl 0.128 (210-V I-TR-55,Second Ed.,June 1986) A tmp#16.txt TR-55 Tabular Hydrograph Method Input Summary Description Developed Basin H 100 Rainfall Distribution Type II Ia/P Interpolation On Total Area 1.2800 ac Peak Time 12.1000 hrs Peak Flow 6.6062 cfs Given Input Data: Subarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) H 1.2800 84 0.1000 0.0000 5.0000 Support Data: Page 1 tmp#16.txt TR-55 Tabular Data DEVELOPED BASIN H 100-YEAR HYDROGRAPH 11.0000 hrs 0. 1570 cfs 11.3000 hrs 0 .2224 cfs 11.6000 hrs 0.3467 cfs 11.9000 hrs 2 .1846 cfs 12.0000 hrs 4 .2319 cfs 12.1000 hrs 6 .6062 cfs 12.2000 hrs 4 .1076 cfs 12.3000 hrs 1.4194 cfs 12 .4000 hrs 0. 9615 cfs 12 .5000 hrs 0.8045 cfs - 12.6000 hrs 0.6802 cfs 12.7000 hrs 0.5625 cfs 12.8000 hrs 0.4971 cfs 13 .0000 hrs 0.4317 cfs - 13 .2000 hrs 0.3728 cfs 13 .4000 hrs 0.3336 cfs 13 .6000 hrs 0.3009 cfs 13 .8000 hrs 0.2747 cfs - 14 .0000 hrs 0.2486 cfs 14.3000 hrs 0.2224 cfs 14 .6000 hrs 0.2093 cfs 15.0000 hrs 0.1897 cfs 15.5000 hrs 0.1701 cfs 16.0000 hrs 0. 1504 cfs 16.5000 hrs 0. 1374 cfs _ 17.0000 hrs 0.1308 cfs 17.5000 hrs 0.1243 cfs 18 . 0000 hrs 0.1177 cfs 19.0000 hrs 0.0981 cfs 20.0000 hrs 0.0850 cfs 22.0000 hrs 0.0785 cfs 26.0000 hrs 0.0000 cfs Total Flow Values 11.0000 hrs 0.1570 cfs 11.3000 hrs 0.2224 cfs 11.6000 hrs 0.3467 cfs - 11. 9000 hrs 2 .1846 cfs 12.0000 hrs 4 .2319 cfs 12.1000 hrs 6 .6062 cfs 12.2000 hrs 4 .1076 cfs - 12 .3000 hrs 1.4194 cfs 12 .4000 hrs 0. 9615 cfs 12 .5000 hrs 0.8045 cfs 12 .6000 hrs 0.6802 cfs - 12 .7000 hrs 0.5625 cfs 12.8000 hrs 0.4971 cfs 13.0000 hrs 0.4317 cfs _ 13.2000 hrs 0.3728 cfs 13.4000 hrs 0.3336 cfs 13.6000 hrs 0.3009 cfs 13. 8000 hrs 0.2747 cfs _ 14. 0000 hrs 0.2486 cfs 14.3000 hrs 0.2224 cfs 14.6000 hrs 0 .2093 cfs Page 1 tmp#16.txt 15.0000 hrs 0. 1897 cfs 15.5000 hrs 0 .1701 cfs 16.0000 hrs 0 . 1504 cfs 16.5000 hrs 0 . 1374 cfs 17.0000 hrs 0 . 1308 cfs 17.5000 hrs 0 .1243 cfs 18.0000 hrs 0 . 1177 cfs 19.0000 hrs 0. 0981 cfs 20.0000 hrs 0.0850 cfs 22.0000 hrs 0. 0785 cfs 26.0000 hrs 0 .0000 cfs Peak Time and Flow 12.1000 hrs 6 .6062 cfs Page 2 tmp#16.txt TR-55 Tabular Hydrograph Method Input Summary Description Developed Basin H 5 Rainfall Distribution Type II Ia/P Interpolation On Total Area 1.2800 ac Peak Time 12.1000 hrs Peak Flow 2.6977 cfs Given Input Data: Subarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) H 1.2800 84 0 .1000 0.0000 2.8000 Support Data: Page 1 tmp#16.txt TR-55 Tabular Data DEVELOPED BASIN H 5-YEAR HYDROGRAPH 11.0000 hrs 0.0533 cfs 11.3000 hrs 0.0754 cfs 11.6000 hrs 0.1176 cfs 11.9000 hrs 0.8162 cfs 12.0000 hrs 1.7127 cfs 12 .1000 hrs 2 .6977 cfs 12 .2000 hrs 1.6491 cfs 12.3000 hrs 0.5874 cfs 12.4000 hrs 0.4101 cfs 12.5000 hrs 0.3456 cfs - 12.6000 hrs 0.2922 cfs 12.7000 hrs 0.2430 cfs 12.8000 hrs 0.2160 cfs 13 .0000 hrs 0.1884 cfs - 13 .2000 hrs 0.1636 cfs 13.4000 hrs 0.1468 cfs 13.6000 hrs 0. 1328 cfs 13.8000 hrs 0.1215 cfs - 14.0000 hrs 0.1102 cfs 14 .3000 hrs 0.0989 cfs 14 .6000 hrs 0.0934 cfs 15.0000 hrs 0.0848 cfs 15.5000 hrs 0.0762 cfs 16.0000 hrs 0.0676 cfs 16.5000 hrs 0.0617 cfs 17.0000 hrs 0.0590 cfs 17.5000 hrs 0.0558 cfs 18.0000 hrs 0.0531 cfs 19.0000 hrs 0.0450 cfs 20.0000 hrs 0.0386 cfs 22 .0000 hrs 0.0359 cfs 26.0000 hrs 0.0000 cfs Total Flow Values 11.0000 hrs 0.0533 cfs 11.3000 hrs 0.0754 cfs 11.6000 hrs 0.1176 cfs - 11.9000 hrs 0.8162 cfs 12.0000 hrs 1.7127 cfs 12.1000 hrs 2.6977 cfs 12.2000 hrs 1.6491 cfs - 12.3000 hrs 0.5874 cfs 12 .4000 hrs 0.4101 cfs 12.5000 hrs 0.3456 cfs 12 .6000 hrs 0.2922 cfs 12 .7000 hrs 0.2430 cfs 12 .8000 hrs 0.2160 cfs 13.0000 hrs 0.1884 cfs 13.2000 hrs 0.1636 cfs 13.4000 hrs 0.1468 cfs 13.6000 hrs 0 .1328 cfs 13.8000 hrs 0 .1215 cfs 14.0000 hrs 0 .1102 cfs 14 .3000 hrs 0 .0989 cfs 14 .6000 hrs 0.0934 cfs Page 1 tmp#16.txt 15.0000 hrs 0.0848 cfs 15.5000 hrs 0.0762 cfs 16.0000 hrs 0.0676 cfs 16.5000 hrs 0.0617 cfs 17.0000 hrs 0.0590 cfs 17.5000 hrs 0.0558 cfs 18.0000 hrs 0.0531 cfs 19.0000 hrs 0.0450 cfs 20.0000 hrs 0.0386 cfs 22.0000 hrs 0.0359 cfs 26.0000 hrs 0.0000 cfs Peak Time and Flow 12.1000 hrs 2 .6977 cfs Page 2 Developed Sub-basin I 18 DEVELOPED Tc Worksheet 3: Time of concentration(Tc)or travel time(Tt) Project: Lighthouse Cove By:jkd Date: 08/11/2000 Location: Weld County,Co Checked:jkd Date: 08/11/2000 DEVELOPEDTc.XLS Condition: Developed Calculations for:Tc NOTES: Basin I Sheet Flow(Applicable to Tc only) Segment ID 1 1. Surface description(table 3-1) light 2. Manning's roughness coeff.,n(table 3-1) 0.015 3. Flow length,L(total L a 300 ft.) ft 68 4. Two-yr 24-hr rainfall,P2 in 2.1 5. Land slope,s ft/ft 0.0720 6. Tt=[0.007(nLy10.8)1/[P210.5)s^(0.4)1 Compute Tt hr 0.01 0.014 Shallow concentrated flow Segment ID 2 7. Surface description(paved or unpaved) unpaved 8. Flow length,L ft 90 9. Watercourse slope,s ft/ft 0.0026 10. Average velocity,V(figure 3-1) ft/s 0.82 11. Tt=L/(3600 V) Compute Tt hr 0.030 0.0301 Shallow concentrated flow(continued) Segment ID 7. Surface description(paved or unpaved) 8. Flow length,L ft 9. Watercourse slope,s ft/ft 10. Average velocity,V(figure 3-1) ft/s 11. Tt=U(3600 V) Compute Tt hr 0.0001 Channel flow Segment ID 3 12. Cross sectional flow area,a ftA2 7.58 13. Wetted perimeter,pw ft 10.54 14. Hydraulic radius,r=a/pw Computer ft 0.72 15. Channel slope,s ft/ft 0.0009 16. Manning's roughness coeff.,n 0.04 _ 17. V=(1.49 r^(2/3)s^(1/2))1n Compute V ft/s 1.28 18. Flow length,L ft 442 19. TI=Ll(3600 V) Compute Tt hr 0.10 0.0961 20. Watershed or subarea Tc or Tt(add Tt in steps 6,11,and 19) hrj 0.141 (210-V1-TR-55,Second Ed.,June 1986) 1 tmp#16.txt TR-55 Tabular Hydrograph Method _ Input Summary Description Developed Basin 1100 Rainfall Distribution Type II Ia/P Interpolation On Total Area 1.3700 ac Peak Tint 12.1000 hrs Peak Flow 7.0708 cfs Given Input Data: Subarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) I 1.3700 84 0.1000 0.0000 5.0000 Support Data: Page 1 tmp#16.txt TR-55 Tabular Data DEVELOPED BASIN I 100-YEAR HYDROGRAPH 11.0000 hrs 0.1680 cfs 11.3000 hrs 0.2380 cfs 11.6000 hrs 0.3710 cfs 11.9000 hrs 2.3382 cfs 12.0000 hrs 4 .5295 cfs 12.1000 hrs 7.0708 cfs 12.2000 hrs 4.3965 cfs 12 .3000 hrs 1.5192 cfs 12.4000 hrs 1.0291 cfs 12.5000 hrs 0.8611 cfs 12.6000 hrs 0.7281 cfs 12.7000 hrs 0.6021 cfs 12.8000 hrs 0.5321 cfs 13 .0000 hrs 0.4620 cfs 13 .2000 hrs 0.3990 cfs 13 .4000 hrs 0.3570 cfs 13 .6000 hrs 0.3220 cfs 13 .8000 hrs 0 .2940 cfs - 14.0000 hrs 0 .2660 cfs 14.3000 hrs 0.2380 cfs 14.6000 hrs 0.2240 cfs 15.0000 hrs 0.2030 cfs 15.5000 hrs 0.1820 cfs 16.0000 hrs 0.1610 cfs 16.5000 hrs 0 .1470 cfs _ 17.0000 hrs 0 . 1400 cfs 17.5000 hrs 0.1330 cfs 18.0000 hrs 0. 1260 cfs 19.0000 hrs 0. 1050 cfs 20.0000 hrs 0.0910 cfs 22 .0000 hrs 0.0840 cfs 26.0000 hrs 0.0000 cfs Total Flow Values 11.0000 hrs 0. 1680 cfs 11.3000 hrs 0.2380 cfs 11.6000 hrs 0.3710 cfs - 11. 9000 hrs 2.3382 cfs 12.0000 hrs 4,5295 cfs 12.1000 hrs 7.0708 cfs 12 .2000 hrs 4 .3965 cfs - 12 .3000 hrs 1.5192 cfs 12.4000 hrs 1.0291 cfs 12.5000 hrs 0.8611 cfs 12.6000 hrs 0.7281 cfs 12.7000 hrs 0.6021 cfs 12.8000 hrs 0.5321 cfs 13.0000 hrs 0 .4620 cfs 13.2000 hrs 0.3990 cfs 13 .4000 hrs 0.3570 cfs 13 .6000 hrs 0.3220 cfs 13 .8000 hrs 0.2940 cfs 14 .0000 hrs 0.2660 cfs 14 .3000 hrs 0.2380 cfs 14 .6000 hrs 0.2240 cfs Page 1 tmp#16.txt 15.0000 hrs 0.2030 cfs 15.5000 hrs 0. 1820 cfs 16.0000 hrs 0.1610 cfs 16.5000 hrs 0.1470 cfs 17.0000 hrs 0.1400 cfs 17.5000 hrs 0.1330 cfs 18.0000 hrs 0. 1260 cfs 19.0000 hrs 0. 1050 cfs 20.0000 hrs 0 .0910 cfs 22.0000 hrs 0.0840 cfs 26.0000 hrs 0.0000 cfs Peak Time and Flow 12 .1000 hrs 7.0708 cfs Page 2 tmp#16 .txt TR-55 Tabular Hydrograph Method Input Summary Description Developed Basin I 5 Rainfall Distribution Type II Ia/P Interpolation On Total Area 1.3700 ac Peak Time 12.1000 hrs Peak Flow 2.8874 cfs Given Input Data: Subarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) I 1.3700 84 0. 1000 0.0000 2.8000 Support Data: Page 1 tmp#16.txt TR-55 Tabular Data DEVELOPED BASIN I 5-YEAR HYDROGRAPH 11.0000 hrs 0.0570 cfs 11.3000 hrs 0.0807 cfs - 11.6000 hrs 0.1259 cfs 11.9000 hrs 0.8736 cfs 12 .0000 hrs 1.8332 cfs 12 .1000 hrs 2.8874 cfs - 12.2000 hrs 1.7651 cfs 12.3000 hrs 0.6287 cfs 12 .4000 hrs 0.4389 cfs 12.5000 hrs 0.3699 cfs - 12.6000 hrs 0.3128 cfs 12 .7000 hrs 0.2601 cfs 12.8000 hrs 0.2311 cfs 13 .0000 hrs 0.2017 cfs 13 .2000 hrs 0.1751 cfs 13.4000 hrs 0. 1572 cfs 13 .6000 hrs 0.1421 cfs 13 .8000 hrs 0.1300 cfs 14 .0000 hrs 0.1179 cfs 14.3000 hrs 0. 1058 cfs 14 .6000 hrs 0.1000 cfs 15.0000 hrs 0.0908 cfs 15.5000 hrs 0.0816 cfs 16.0000 hrs 0.0724 cfs 16.5000 hrs 0.0661 cfs - 17.0000 hrs 0.0632 cfs 17.5000 hrs 0.0597 cfs 18.0000 hrs 0.0568 cfs 19.0000 hrs 0.0482 cfs - 20.0000 hrs 0.0413 cfs 22.0000 hrs 0.0384 cfs 26.0000 hrs 0.0000 cfs Total Flow Values 11.0000 hrs 0.0570 cfs 11.3000 hrs 0.0807 cfs 11.6000 hrs 0.1259 cfs 11.9000 hrs 0.8736 cfs 12.0000 hrs 1.8332 cfs 12 .1000 hrs 2.8874 cfs 12.2000 hrs 1.7651 cfs 12.3000 hrs 0.6287 cfs 12.4000 hrs 0.4389 cfs 12.5000 hrs 0.3699 cfs 12 .6000 hrs 0.3128 cfs 12.7000 hrs 0.2601 cfs 12.8000 hrs 0.2311 cfs 13 .0000 hrs 0.2017 cfs - 13 .2000 hrs 0.1751 cfs 13 .4000 hrs 0.1572 cfs 13.6000 hrs 0.1421 cfs 13. 8000 hrs 0.1300 cfs - 14.0000 hrs 0. 1179 cfs 14 .3000 hrs 0.1058 cfs 14 .6000 hrs 0.1000 cfs Page 1 tmp#16.txt 15.0000 hrs 0.0908 cfs 15.5000 hrs 0.0816 cfs 16.0000 hrs 0.0724 cfs 16.5000 hrs Cr.0661 cfs 17.0000 hrs 0.0632 cfs 17.5000 hrs 0.0597 cfs 18.0000 hrs 0.0568 cfs 19.0000 hrs 0.0482 cfs 20.0000 hrs 0.0413 cfs 22.0000 hrs 0.0384 cfs -- 26.0000 hrs 0.0000 cfs Peak Time and Flow 12.1000 hrs 2.8874 cfs Page 2 Developed Sub-basin J 19 DEVELOPED Tc Worksheet 3:Time of concentration(Tc)or travel time(Tt) Project: Lighthouse Cove By: jkd Date: 08/11/2000 Location: Weld County,Co Checked:jkd Date: 08/11/2000 DEVELOPEDTCXLS Condition: Developed Calculations for:Tc NOTES: Basin J Sheet Flow(Applicable to Tc only) Segment ID I 1. Surface description(table 3-1) light 2. Manning's roughness coeff.,n(table 3-1) 0.013 3. Flow length,L(total L<=300 ft.) ft 100 4. Two-yr 24-hr rainfall,P2 in 2.1 5. Land slope,s ft/ft 0.0050 6. Tt=[0.007(nLY(0.8)1/832110.5)r(0.4)] Compute Tt hr 0.05 0.050 Shallow concentrated flow Segment ID 2 7. Surface description(paved or unpaved) paved 8. Flow length,L ft 60 9. Watercourse slope,s f/ft 0.0092 10. Average velocity,V(figure 3-1) ft/s 1.55 11. Tt=L/(3600 V) Compute Tt hr 0.011 0.0111 Shallow concentrated flow(continued) Segment ID 7. Surface description(paved or unpaved) 8. Flow length,L ft 9. Watercourse slope,s ft/ft 10. Average velocity,V(figure 3-1) ft/s 11. Tt=L/(3600 V) Compute Tt . hr 0.0001 Channel flow Segment ID 3 12. Cross sectional flow area,a ft^2 7.58 13. Wetted perimeter,pw ft 10.54 14. Hydraulic radius,r=a/pw Computer fl 0.72 15. Channel slope,s ft/ft 0.0058 16. Manning's roughness coeff.,n 0.013 _ 17. V=(1.49 r^(2/3)s=(1/2)pn Compute V ft/s 1.28 18. Flow length,L ft 414 19. Tt=U(3600 V) Compute Tt hr 0.09 0.0901 20. Watershed or subarea Tc or Tt(add Tt in steps 6,11,and 19) 0.150 (210-V I-TR-55,Second Ed.,June 1986) tmp#16.txt TR-55 Tabular Hydrograph Method Input Summary Description Developed Basin J 5 Rainfall Distribution Type II Ia/P Interpolation On Total Area 0.8100 ac Peak Time 12.1000 hrs Peak Flow 3 .2841 cfs Given Input Data: Subarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) J 0.8100 98 0.1000 0.0000 2.8000 Support Data: — Messages: Warning: Runoff coef > 98. 98 used in row c%d>. Page 1 tmp#16.txt TR-55 Tabular Data DEVELOPED BASIN J 5-YEAR HYDROGRAPH 11.0000 hrs 0.0780 cfs 11.3000 hrs 0.1106 cfs 11.6000 hrs 0.1723 cfs 11.9000 hrs 1.0860 cfs 12 .0000 hrs 2 .1038 cfs 12 .1000 hrs 3 .2841 cfs - 12 .2000 hrs 2 .0420 cfs 12 .3000 hrs 0.7056 cfs 12.4000 hrs 0.4780 cfs 12 .5000 hrs 0.3999 cfs - 12.6000 hrs 0.3382 cfs 12.7000 hrs 0.2796 cfs 12.8000 hrs 0.2471 cfs 13.0000 hrs 0.2146 cfs - 13 .2000 hrs 0.1853 cfs 13 .4000 hrs 0.1658 cfs 13 .6000 hrs 0.1496 cfs 13 .8000 hrs 0.1366 cfs 14 .0000 hrs 0.1236 cfs 14.3000 hrs 0.1106 cfs 14 .6000 hrs 0.1041 cfs _ 15.0000 hrs 0.0943 cfs 15.5000 hrs 0.0845 cfs 16.0000 hrs 0.0748 cfs 16.5000 hrs 0.0683 cfs 17.0000 hrs 0.0650 cfs 17.5000 hrs 0.0618 cfs 18.0000 hrs 0.0585 cfs 19.0000 hrs 0.0488 cfs - 20.0000 hrs 0.0423 cfs 22.0000 hrs 0.0390 cfs 26.0000 hrs 0.0000 cfs Total Flow Values 11.0000 hrs 0.0780 cfs 11.3000 hrs 0.1106 cfs 11.6000 hrs 0.1723 cfs - 11.9000 hrs 1.0860 cfs 12.0000 hrs 2 .1038 cfs 12.1000 hrs 3 .2841 cfs 12.2000 hrs 2 .0420 cfs - 12.3000 hrs 0.7056 cfs 12.4000 hrs 0.4780 cfs 12.5000 hrs 0.3999 cfs _ 12.6000 hrs 0.3382 cfs 12.7000 hrs 0.2796 cfs 12.8000 hrs 0.2471 cfs 13.0000 hrs 0.2146 cfs 13.2000 hrs 0.1853 cfs 13.4000 hrs 0.1658 cfs 13.6000 hrs 0.1496 cfs 13.8000 hrs 0. 1366 cfs - 14.0000 hrs 0 . 1236 cfs 14.3000 hrs 0.1106 cfs 14.6000 hrs 0.1041 cfs Page 1 tmp#16.txt 15.0000 hrs 0.0943 cfs 15.5000 hrs 0.0845 cfs 16.0000 hrs 0.0748 cfs 16.5000 hrs 0.0683 cfs 17.0000 hrs 0.0650 cfs 17.5000 hrs 0.0618 cfs — 18.0000 hrs 0.0585 cfs 19.0000 hrs 0.0488 cfs 20.0000 hrs 0.0423 cfs 22.0000 hrs 0.0390 cfs — 26.0000 hrs 0.0000 cfs Peak Time and Flow 12.1000 hrs 3.2841 cfs Page 2 tmp#16.txt TR-55 Tabular Hydrograph Method _ Input Summary Description Developed Basin J 100 Rainfall Distribution Type II Ia/P Interpolation On Total Area 0.8100 ac Peak Time 12.1000 hrs Peak Flow 6.0887 cfs Given Input Data: - Subarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) J 0.8100 98 0.1000 0.0000 5.0000 Support Data: - Messages: Warning: Runoff coef > 98. 98 used in row c%d>. Page 1 tmp#16.txt TR-55 Tabular Data DEVELOPED BASIN J 100-YEAR HYDROGRAPH 11.0000 hrs 0.1447 cfs 11.3000 hrs 0.2050 cfs 11.6000 hrs 0.3195 cfs 11.9000 hrs 2.0135 cfs 12.0000 hrs 3.9004 cfs 12.1000 hrs 6.0887 cfs - 12.2000 hrs 3 .7858 cfs 12.3000 hrs 1.3082 cfs 12.4000 hrs 0.8862 cfs 12.5000 hrs 0.7415 cfs - 12.6000 hrs 0.6270 cfs 12.7000 hrs 0.5184 cfs 12.8000 hrs 0.4582 cfs 13.0000 hrs 0.3979 cfs - 13.2000 hrs 0.3436 cfs 13.4000 hrs 0.3074 cfs 13.6000 hrs 0.2773 cfs 13.8000 hrs 0.2532 cfs 14.0000 hrs 0.2291 cfs 14.3000 hrs 0.2050 cfs 14.6000 hrs 0.1929 cfs 15 .0000 hrs 0.1748 cfs 15.5000 hrs 0.1567 cfs 16.0000 hrs 0.1387 cfs 16.5000 hrs 0.1266 cfs 17.0000 hrs 0.1206 cfs 17.5000 hrs 0.1145 cfs 18.0000 hrs 0.1085 cfs 19.0000 hrs 0.0904 cfs - 20.0000 hrs 0.0784 cfs 22.0000 hrs 0.0723 cfs 26.0000 hrs 0.0000 cfs Total Flow Values 11.0000 hrs 0.1447 cfs 11.3000 hrs 0.2050 cfs 11.6000 hrs 0.3195 cfs - 11.9000 hrs 2.0135 cfs 12.0000 hrs 3.9004 cfs 12.1000 hrs 6.0887 cfs 12.2000 hrs 3.7858 cfs 12.3000 hrs 1.3082 cfs 12.4000 hrs 0.8862 cfs 12.5000 hrs 0.7415 cfs _ 12 .6000 hrs 0.6270 cfs 12 .7000 hrs 0.5184 cfs 12.8000 hrs 0.4582 cfs 13 .0000 hrs 0.3979 cfs 13 .2000 hrs 0.3436 cfs 13 .4000 hrs 0.3074 cfs 13.6000 hrs 0.2773 cfs 13.8000 hrs 0.2532 cfs - 14.0000 hrs 0.2291 cfs 14.3000 hrs 0.2050 cfs 14 .6000 hrs 0.1929 cfs Page 1 tmp#16.txt 15.0000 hrs 0.1748 cfs 15.5000 hrs 0.1567 cfs 16.0000 hrs 0.1387 cfs 16.5000 hrs 0.1266 cfs 17.0000 hrs 0.1206 cfs 17.5000 hrs 0.1145 cfs — 18.0000 hrs 0.1085 cfs 19.0000 hrs 0.0904 cfs 20.0000 hrs 0.0784 cfs 22.0000 hrs 0.0723 cfs — 26.0000 hrs 0.0000 cfs Peak Time and Flow 12.1000 hrs 6.0887 cfs Page 2 Developed Sub-basin K 20 DEVELOPED Tc Worksheet 3:Time of concentration(Tc)or travel time(Tt) Project: Lighthouse Cove By:jkd Date: 08/11/2000 Location: Weld County,Co Checked: jkd Date: 08/11/2000 DEVELOPEOTCXLS _ Condition: Developed Calculations for:Tc NOTES: Basin K Sheet Flow(Applicable to Tc only) Segment ID 1 1. Surface description(table 3-1) light 2. Manning's roughness coeff.,n(table 3-1) 0.013 3. Flow length,L(total L a 300 ft.) ft 70 4. Two-yr 24-hr rainfall,P2 in 2.1 5. Land slope,s ft/ft 0.0078 6. Tt=[0.007(nL)A(0.8)y(P2A(0.5)5A(0.4)] Compute Tt hr 0.03 0.031 Shallow concentrated flow Segment ID 2 7. Surface description(paved or unpaved) paved 8. Flow length,L ft 14 9. Watercourse slope,s ft/ft 0.014 10. Average velocity,V(figure 3-1) ft/s 1.91 11. Tt=L/(3600 V) Compute Tt hr 0.002 0.0021 - Shallow concentrated flow(continued) Segment ID 7. Surface description(paved or unpaved) 8. Flow length,L ft 9. Watercourse slope,s ft/ft - 10. Average velocity,V(figure 3-1) ft/s 11. Tt=LJ(3600 V) Compute Tt hr 0.0001 Channel flow Segment ID 3 12. Cross sectional flow area,a ftA2 7.58 13. Wetted perimeter,pw ft 10.54 - 14. Hydraulic radius,r=a/pw Computer ft 0.72 15. Channel slope,s ft/ft 0.0065 16. Manning's roughness coeff.,n 0.013 17. V=(1.49 rA(2/3)sA(1/2)yn Compute V ft/s 1.28 18. Flow length,L ft 466 19. Tt=L/(3600 V) Compute Tt hr 0.10 0.1021 - 20. Watershed or subarea Tc or Tt(add Tt in steps 6,11,and 19) hr 0.135 (210-V I-TR-55,Second Ed.,June 1986) K tmp#16 .txt TR-55 Tabular Hydrograph Method Input Summary Description Developed Basin K 5 Rainfall Distribution Type II Ia/P Interpolation On Total Area 1.3600 ac Peak Time 12.1000 hrs Peak Flow 5.5141 cfs Given Input Data: Subarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) K 1.3600 98 0.1000 0.0000 2.8000 Support Data: Messages: Warning: Runoff coef > 98. 98 used in row c%d>. Page 1 tmp#16.txt TR-55 Tabular Data - DEVELOPED BASIN K 5-YEAR HYDROGRAPH 11.0000 hrs 0.1310 cfs 11.3000 hrs 0.1856 cfs 11.6000 hrs 0.2894 cfs 11.9000 hrs 1.8235 cfs 12.0000 hrs 3.5323 cfs 12. 1000 hrs 5.5141 cfs 12.2000 hrs 3.4285 cfs 12.3000 hrs 1. 1847 cfs 12.4000 hrs 0.8025 cfs 12 .5000 hrs 0.6715 cfs 12 .6000 hrs 0.5678 cfs 12.7000 hrs 0.4695 cfs 12.8000 hrs 0.4149 cfs 13.0000 hrs 0.3603 cfs - 13.2000 hrs 0.3112 cfs 13.4000 hrs 0.2784 cfs 13 .6000 hrs 0.2511 cfs 13 .8000 hrs 0.2293 cfs - 14 .0000 hrs 0.2075 cfs 14 .3000 hrs 0.1856 cfs 14 .6000 hrs 0.1747 cfs 15.0000 hrs 0.1583 cfs - 15.5000 hrs 0.1419 cfs 16.0000 hrs 0.1256 cfs 16.5000 hrs 0.1146 cfs 17.0000 hrs 0.1092 cfs - 17.5000 hrs 0.1037 cfs 18.0000 hrs 0.0983 cfs 19.0000 hrs 0.0819 cfs _ 20.0000 hrs 0.0710 cfs 22.0000 hrs 0.0655 cfs 26.0000 hrs 0.0000 cfs Total Flow Values 11.0000 hrs 0.1310 cfs 11.3000 hrs 0.1856 cfs 11.6000 hrs 0.2894 cfs - 11.9000 hrs 1.8235 cfs 12.0000 hrs 3 .5323 cfs 12. 1000 hrs 5.5141 cfs 12.2000 hrs 3 .4285 cfs - 12.3000 hrs 1.1847 cfs 12.4000 hrs 0.8025 cfs 12.5000 hrs 0.6715 cfs 12.6000 hrs 0.5678 cfs - 12.7000 hrs 0.4695 cfs 12.8000 hrs 0.4149 cfs 13.0000 hrs 0 .3603 cfs 13.2000 hrs 0.3112 cfs - 13.4000 hrs 0.2784 cfs 13.6000 hrs 0.2511 cfs 13.8000 hrs 0 .2293 cfs 14 .0000 hrs 0.2075 cfs 14.3000 hrs 0.1856 cfs 14.6000 hrs 0 .1747 cfs Page 1 tmp#16.txt 15.0000 hrs 0.1583 cfs 15.5000 hrs 0.1419 cfs 16.0000 hrs 0.1256 cfs 16.5000 hrs 0.1146 cfs 17.0000 hrs 0.1092 cfs 17.5000 hrs 0.1037 cfs 18.0000 hrs 0.0983 cfs 19.0000 hrs 0.0819 cfs 20.0000 hrs 0.0710 cfs 22.0000 hrs 0.0655 cfs 26.0000 hrs 0.0000 cfs Peak Time and Flow 12.1000 hrs 5.5141 cfs Page 2 tmp#16.txt TR-55 Tabular Hydrograph Method Input Summary Description Developed Basin K 100 Rainfall Distribution Type II Ia/P Interpolation On Total Area 1.3600 ac Peak Time 12.1000 hrs Peak Flow 10.2230 cfs Given Input Data: — Subarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) K 1.3600 98 0.1000 0.0000 5.0000 Support Data: Page 1 tmp#16.txt TR-55 Tabular Data DEVELOPED BASIN K 100-YEAR HYDROGRAPH 11.0000 hrs 0.2429 cfs 11.3000 hrs 0.3441 cfs — 11.6000 hrs 0.5365 cfs 11.9000 hrs 3.3807 cfs 12.0000 hrs 6.5488 cfs 12 .1000 hrs 10.2230 cfs 12.2000 hrs 6.3564 cfs 12.3000 hrs 2.1964 cfs 12.4000 hrs 1.4879 cfs 12.5000 hrs 1.2450 cfs — 12.6000 hrs 1.0527 cfs 12.7000 hrs 0.8705 cfs 12.8000 hrs 0.7693 cfs 13.0000 hrs 0.6680 cfs - 13.2000 hrs 0.5769 cfs 13.4000 hrs 0.5162 cfs 13 .6000 hrs 0.4656 cfs 13.8000 hrs 0.4251 cfs - 14.0000 hrs 0.3846 cfs 14.3000 hrs 0.3441 cfs 14.6000 hrs 0.3239 cfs 15.0000 hrs 0.2935 cfs 15.5000 hrs 0.2632 cfs 16.0000 hrs 0.2328 cfs 16.5000 hrs 0.2126 cfs — 17.0000 hrs 0.2024 cfs 17.5000 hrs 0.1923 cfs 18.0000 hrs 0.1822 cfs 19.0000 hrs 0.1518 cfs 20.0000 hrs 0.1316 cfs 22.0000 hrs 0.1215 cfs 26.0000 hrs 0.0000 cfs Total Flow Values 11.0000 hrs 0.2429 cfs 11.3000 hrs 0.3441 cfs 11.6000 hrs 0.5365 cfs - 11.9000 hrs 3.3807 cfs 12.0000 hrs 6.5488 cfs 12.1000 hrs 10.2230 cfs 12.2000 hrs 6.3564 cfs - 12.3000 hrs 2.1964 cfs 12.4000 hrs 1.4879 cfs 12.5000 hrs 1.2450 cfs 12.6000 hrs 1.0527 cfs - 12.7000 hrs 0.8705 cfs 12.8000 hrs 0.7693 cfs 13 .0000 hrs 0.6680 cfs — 13.2000 hrs 0.5769 cfs 13.4000 hrs 0.5162 cfs 13.6000 hrs 0.4656 cfs • 13.8000 hrs 0.4251 cfs 14 .0000 hrs 0.3846 cfs 14.3000 hrs 0.3441 cfs 14.6000 hrs 0.3239 cfs Page 1 tmp#16.txt 15.0000 hrs 0.2935 cfs 15.5000 hrs 0.2632 cfs _ 16.0000 hrs 0.2328 cfs 16.5000 hrs 0.2126 cfs 17.0000 hrs 0.2024 cfs 17.5000 hrs 0.1923 cfs 18.0000 hrs 0.1822 cfs 19.0000 hrs 0.1518 cfs 20.0000 hrs 0.1316 cfs 22.0000 hrs 0.1215 cfs 26.0000 hrs 0.0000 cfs Peak Time and Flow 12.1000 hrs 10.2230 cfs Page 2 DEVELOPED Tc Worksheet 3: Time of concentration(Tc)or travel time(Tt) Project: Lighthouse Cove By:jkd Date: 08/11/2000 Location: Weld County,Co Checked:jkd Date: 08/11/2000 DEVELOPEDTc.XLS Condition: Developed Calculations for:Tc NOTES: Basin K Sheet Flow(Applicable to Tc only) Segment ID l 1. Surface description(table 3-1) light 2. Manning's roughness coeff.,n(table 3-1) 0.013 3. Flow length,L(total L<=300 ft.) ft 70 4. Two-yr 24-hr rainfall,P2 in 2.1 5. Land slope,s ft/ft 0.0078 6. Tt=[0.007(nL)"(0.6)]/[P2"(0.5)980.4)1 Compute Tt hr 0.03 0.031 Shallow concentrated flow Segment ID 2 7. Surface description(paved or unpaved) paved 8. Flow length,L ft 14 9. Watercourse slope,s ft/ft 0.014 10. Average velocity,V(figure 3-1) ft/s 1.91 11. Tt=L/(3600 V) Compute Tt hr 0.002 0.0021 -- Shallow concentrated flow(continued) Segment ID 7. Surface description(paved or unpaved) 8. Flow length,L ft 9. Watercourse slope,s ft/ft 10. Average velocity,V(figure 3-1) ft/s 11. Tt=L/(3600 V) Compute TI hr 0.0001 Channel flow Segment ID 3 12. Cross sectional flow area,a ft^2 7.58 13. Welled perimeter,pw ft 10.54 14. Hydraulic radius,r=a/pw Computer ft 0.72 15. Channel slope,s ft/ft_ 0.0065 16. Manning's roughness coeff.,n 0.013 17. V=(1.49 r^(2/3)s^(1/2))/n Compute V ft/s 1.28 18. Flow length,L ft 466 19. Tt=U(3600 V) Compute Tt hr 0.10 0.1021 20. Watershed or subarea Tc or Tt(add Tt in steps 6,11,and 19) 14 0.1351 (210-V 1-TR-55,Second Ed.,June 1986) K tmp#16.txt TR-55 Tabular Hydrograph Method Input Summary Description Developed Basin K 5 Rainfall Distribution Type II Ia/P Interpolation On Total Area 1.3600 ac Peak Time 12.1000 hrs Peak Flow 5.5141 cfs Given Input Data: Subarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) K 1.3600 98 0.1000 0.0000 2.8000 Support Data: Messages: Warning: Runoff coef > 98. 98 used in row c%d>. Page 1 tmp#16.txt TR-55 Tabular Data DEVELOPED BASIN K 5-YEAR HYDROGRAPH 11.0000 hrs 0. 1310 cfs 11.3000 hrs 0. 1856 cfs 11.6000 hrs 0.2894 cfs 11.9000 hrs 1.8235 cfs 12.0000 hrs 3.5323 cfs 12.1000 hrs 5.5141 cfs 12.2000 hrs 3.4285 cfs 12.3000 hrs 1.1847 cfs 12.4000 hrs 0.8025 cfs 12.5000 hrs 0.6715 cfs - 12.6000 hrs 0.5678 cfs 12.7000 hrs 0.4695 cfs 12.8000 hrs 0.4149 cfs 13 .0000 hrs 0.3603 cfs - 13 .2000 hrs 0.3112 cfs 13.4000 hrs 0.2784 cfs 13 .6000 hrs 0.2511 cfs 13.8000 hrs 0.2293 cfs - 14.0000 hrs 0.2075 cfs 14.3000 hrs 0.1856 cfs 14.6000 hrs 0.1747 cfs 15.0000 hrs 0.1583 cfs 15.5000 hrs 0.1419 cfs 16.0000 hrs 0.1256 cfs 16.5000 hrs 0.1146 cfs 17.0000 hrs 0.1092 cfs 17.5000 hrs 0.1037 cfs 18.0000 hrs 0.0983 cfs 19.0000 hrs 0.0819 cfs 20.0000 hrs 0.0710 cfs 22.0000 hrs 0.0655 cfs 26.0000 hrs 0.0000 cfs Total Flow Values 11.0000 hrs 0.1310 cfs 11.3000 hrs 0.1856 cfs 11.6000 hrs 0.2894 cfs - 11.9000 hrs 1.8235 cfs 12.0000 hrs 3 .5323 cfs 12.1000 hrs 5.5141 cfs 12.2000 hrs 3.4285 cfs - 12.3000 hrs 1 .1847 cfs 12.4000 hrs 0.8025 cfs 12.5000 hrs 0.6715 cfs 12.6000 hrs 0.5678 cfs - 12.7000 hrs 0.4695 cfs 12.8000 hrs 0.4149 cfs 13 .0000 hrs 0.3603 cfs 13.2000 hrs 0.3112 cfs 13.4000 hrs 0.2784 cfs 13.6000 hrs 0.2511 cfs 13.8000 hrs 0.2293 cfs - 14.0000 hrs 0.2075 cfs 14.3000 hrs 0.1856 cfs 14 .6000 hrs 0.1747 cfs Page 1 tmp#16.txt 15.0000 hrs 0.1583 cfs 15.5000 hrs 0.1419 cfs 16.0000 hrs 0.1256 cfs _ 16.5000 hrs 0.1146 cfs 17.0000 hrs 0.1092 cfs 17.5000 hrs 0.1037 cfs 18.0000 hrs 0.0983 cfs 19.0000 hrs 0.0819 cfs 20.0000 hrs 0.0710 cfs 22.0000 hrs 0.0655 cfs — 26.0000 hrs 0.0000 cfs Peak Time and Flow 12.1000 hrs 5.5141 cfs Page 2 tmp#16.txt TR-55 Tabular Hydrograph Method Input Summary Description Developed Basin K 100 Rainfall Distribution Type II Ia/P Interpolation On Total Area 1.3600 ac Peak Time 12.1000 hrs Peak Flow 10.2230 cfs Given Input Data: Subarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) K 1.3600 98 0 .1000 0.0000 5.0000 Support Data: Page 1 tmp#16.txt TR-55 Tabular Data DEVELOPED BASIN K 100-YEAR HYDROGRAPH 11.0000 hrs 0.2429 cfs 11.3000 hrs 0.3441 cfs 11.6000 hrs 0.5365 cfs 11.9000 hrs 3 .3807 cfs 12.0000 hrs 6.5488 cfs 12 .1000 hrs 10.2230 cfs — 12 .2000 hrs 6.3564 cfs 12.3000 hrs 2.1964 cfs 12.4000 hrs 1.4879 cfs 12.5000 hrs 1.2450 cfs - 12.6000 hrs 1.0527 cfs 12.7000 hrs 0.8705 cfs 12.8000 hrs 0.7693 cfs 13 .0000 hrs 0.6680 cfs - 13.2000 hrs 0.5769 cfs 13.4000 hrs 0.5162 cfs 13.6000 hrs 0.4656 cfs 13.8000 hrs 0.4251 cfs 14 .0000 hrs 0.3846 cfs 14 .3000 hrs 0.3441 cfs 14 .6000 hrs 0.3239 cfs 15.0000 hrs 0.2935 cfs 15.5000 hrs 0.2632 cfs 16.0000 hrs 0.2328 cfs 16.5000 hrs 0.2126 cfs 17.0000 hrs 0.2024 cfs 17.5000 hrs 0.1923 cfs 18.0000 hrs 0.1822 cfs 19.0000 hrs 0.1518 cfs - 20.0000 hrs 0.1316 cfs 22.0000 hrs 0.1215 cfs 26 .0000 hrs 0.0000 cfs Total Flow Values 11.0000 hrs 0.2429 cfs 11.3000 hrs 0.3441 cfs 11.6000 hrs 0.5365 cfs - 11.9000 hrs 3.3807 cfs 12.0000 hrs 6.5488 cfs 12.1000 hrs 10.2230 cfs 12.2000 hrs 6.3564 cfs - 12.3000 hrs 2.1964 cfs 12.4000 hrs 1.4879 cfs 12.5000 hrs 1.2450 cfs _ 12.6000 hrs 1.0527 cfs 12.7000 hrs 0.8705 cfs 12.8000 hrs 0.7693 cfs 13 .0000 hrs 0.6680 cfs — 13 .2000 hrs 0.5769 cfs 13 .4000 hrs 0.5162 cfs 13.6000 hrs 0.4656 cfs 13.8000 hrs 0.4251 cfs - 14.0000 hrs 0.3846 cfs 14.3000 hrs 0.3441 cfs 14 .6000 hrs 0.3239 cfs Page 1 —' tmp#16.txt 15.0000 hrs 0.2935 cfs 15.5000 hrs 0.2632 cfs 16.0000 hrs 0.2328 cfs 16.5000 hrs 0.2126 cfs 17.0000 hrs 0.2024 cfs 17.5000 hrs 0.1923 cfs 18.0000 hrs 0.1822 cfs 19.0000 hrs 0.1518 cfs 20.0000 hrs 0.1316 cfs 22.0000 hrs 0.1215 cfs 26.0000 hrs 0.0000 cfs Peak Time and Flow 12.1000 hrs 10.2230 cfs Page 2 i 1 1 I Developed Sub-basin L I I 1_ 1_ I. t 21 DEVELOPED Tc Worksheet 3: Time of concentration (Tc)or travel time(Tt) Project: Lighthouse Cove By:jkd Date: 08/11/2000 Location: Weld County,Co Checked: jkd Date: 08/11/2000 DEVELOPEDTc.XLS Condition: Developed Calculations for:Tc NOTES: Basin L Sheet Flow(Applicable to Tc only) Segment ID 1 1. Surface description(table 3-1) light 2. Manning's roughness coeff.,n(table 3-1) 0.013 3. Flow length,L(total L<=300 ft.) ft 31 4. Two-yr 24-hr rainfall,P2 in 2.1 5. Land slope,s ft/ft 0.0322 6. Tt=[0.007(nL)"(0.8)]/[P2"(0.5)s"(0.4)] Compute Tt hr 0.01 0.009 Shallow concentrated flow Segment ID 2 7. Surface description(paved or unpaved) unpaved 8. Flow length,L ft 12 9. Watercourse slope,s ft/ft 0.25 10. Average velocity,V(figure 3-1) ft/s 8.07 11. Tt=L/(3600 V) Compute Tt hr 0.000 0,(0041 Shallow concentrated flow(continued) Segment ID 7. Surface description(paved or unpaved) 8. Flow length,L ft 9. Watercourse slope,s ft/ft 10. Average velocity,V(figure 3-1) 11. Tt=U(3600 V) Compute It hr 0 0001 Channel flow Segment ID 3 12. Cross sectional flow area,a ft^2 7.58 13. Wetted perimeter,pw ft 10.54 14. Hydraulic radius,r=a/pw Computer ft 0.72 15. Channel slope,s ft/ft 0.0020 16. Manning's roughness coeff.,n 0.013 17. V=(1.49 r"(2/3)s"(1/2))/n Compute V (Vs 1.28 18. Flow length,L ft 505 19. Tt=L/(3600 V) Compute Tt hr 0.11 0.1101 20. Watershed or subarea Tc or Tt(add Tt in steps 6.11,and 19) f_ 0.12 (210-V1-TR-55,Second Ed.,June 1986) L V tmp#16.txt TR-55 Tabular Hydrograph Method Input Summary Description Developed Basin L 100 Rainfall Distribution Type II Ia/P Interpolation On Total Area 0.5500 ac Peak Time 12.1000 hrs Peak Flow 1.6493 cfs Given Input Data: — Subarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) L 0.5500 69 0.1000 0.0000 5.0000 Support Data: Page 1 tmp#16.txt TR-55 Tabular Data DEVELOPED BASIN L 100-YEAR HYDROGRAPH 11.0000 hrs 0.0243 cfs 11.3000 hrs 0.0344 cfs - 11.6000 hrs 0.0536 cfs 11.9000 hrs 0.4411 cfs 12 .0000 hrs 1 .0354 cfs 12 .1000 hrs 1 .6493 cfs - 12 .2000 hrs 0 .9866 cfs 12 .3000 hrs 0 .3650 cfs 12.4000 hrs 0 .2640 cfs 12.5000 hrs 0 .2243 cfs 12.6000 hrs 0 . 1897 cfs 12.7000 hrs 0 . 1587 cfs 12.8000 hrs 0. 1419 cfs _ 13 .0000 hrs 0. 1244 cfs 13 .2000 hrs 0. 1086 cfs 13 .4000 hrss0.0979 cfs 13 .6000 hrs 0.0888 cfs 13 .8000 hrs 0.0814 cfs 14 .0000 hrs 0.0740 cfs 14 .3000 hrs 0.0666 cfs 14 .6000 hrs 0.0632 cfs - 15.0000 hrs 0.0575 cfs 15.5000 hrs 0.0518 cfs 16.0000 hrs 0.0461 cfs 16.5000 hrs 0.0420 cfs - 17.0000 hrs 0.0403 cfs 17.5000 hrs 0 . 0380 cfs 18 .0000 hrs 0 .0363 cfs 19.0000 hrs 0.0313 cfs - 20.0000 hrs 0.0266 cfs 22.0000 hrs 0.0249 cfs 26.0000 hrs 0.0000 cfs Total Flow Values 11.0000 hrs 0.0243 cfs 11.3000 hrs 0.0344 cfs 11.6000 hrs 0.0536 cfs 11.9000 hrs 0.4411 cfs 12.0000 hrs 1.0354 cfs 12.1000 hrs 1 .6493 cfs 12.2000 hrs 0 .9866 cfs 12.3000 hrs 0 .3650 cfs 12.4000 hrs 0 .2640 cfs 12.5000 hrs 0 .2243 cfs 12.6000 hrs 0 .1897 cfs 12.7000 hrs 0 .1587 cfs 12.8000 hrs 0 .1419 cfs 13 .0000 hrs 0 .1244 cfs - 13 .2000 hrs 0 .1086 cfs 13.4000 hrs 0 . 0979 cfs 13.6000 hrs 0 .0888 cfs 13.8000 hrs 0 .0814 cfs - 14.0000 hrs 0 .0740 cfs 14.3000 hrs 0 .0666 cfs 14.6000 hrs 0 .0632 cfs Page 1 tmp#16.txt 15.0000 hrs 0.0575 cfs 15.5000 hrs 0.0518 cfs — 16.0000 hrs 0.0461 cfs 16.5000 hrs 0.0420 cfs 17 .0000 hrs 0.0403 cfs 17.5000 hrs 0.0380 cfs — 18.0000 hrs 0.0363 cfs 19.0000 hrs 0.0313 cfs 20.0000 hrs 0.0266 cfs 22.0000 hrs 0.0249 cfs — 26.0000 hrs 0.0000 cfs Peak Time and Flow 12. 1000 hrs 1.6493 cfs Page 2 tmp#16.txt TR-55 Tabular Hydrograph Method — Input Summary Description Developed Basin L 5 Rainfall Distribution Type II Ia/P Interpolation On Total Area 0.5500 ac Peak Time 12.1000 hrs Peak Flow 0.4347 cfs Given Input Data: Subarea D/S Subareas Area CN Tc Tt Rainfall Description (ac) (hrs) (hrs) (in) L ' 0.5500 69 0.1000 0.0000 2.8000 Support Data: Page 1 tmp#16.txt TR-55 Tabular Data DEVELOPED BASIN L 5-YEAR HYDROGRAPH 11.0000 hrs 0.0000 cfs 11.3000 hrs 0.0000 cfs 11.6000 hrs 0.0000 cfs 11.9000 hrs 0.0670 cfs 12.0000 hrs 0.2507 cfs 12.1000 hrs 0.4347 cfs 12.2000 hrs 0.2472 cfs 12.3000 hrs 0.1044 cfs 12.4000 hrs 0.0835 cfs 12.5000 hrs 0.0727 cfs 12.6000 hrs 0.0616 cfs 12.7000 hrs 0 .0525 cfs 12.8000 hrs 0.0477 cfs 13 .0000 hrs 0.0424 cfs 13 .2000 hrs 0 .0376 cfs 13.4000 hrs 0.0342 cfs 13 .6000 hrs 0.0313 cfs 13.8000 hrs 0.0289 cfs 14.0000 hrs 0.0265 cfs 14.3000 hrs 0 .0240 cfs 14.6000 hrs 0.0230 cfs 15.0000 hrs 0 .0211 cfs 15.5000 hrs 0.0191 cfs 16.0000 hrs 0. 0171 cfs 16 .5000 hrs 0. 0157 cfs - 17.0000 hrs 0.0152 cfs 17.5000 hrs 0. 0142 cfs 18.0000 hrs 0.0137 cfs 19.0000 hrs 0. 0122 cfs - 20.0000 hrs 0. 0102 cfs 22.0000 hrs 0.0097 cfs 26.0000 hrs 0. 0000 cfs Total Flow Values 11.0000 hrs 0.0000 cfs 11.3000 hrs 0.0000 cfs 11.6000 hrs 0.0000 cfs - 11.9000 hrs 0.0670 cfs 12 .0000 hrs 0.2507 cfs 12 .1000 hrs 0.4347 cfs _ 12.2000 hrs 0.2472 cfs 12.3000 hrs 0.1044 cfs 12.4000 hrs 0 .0835 cfs 12.5000 hrs 0.0727 cfs 12.6000 hrs 0.0616 cfs 12.7000 hrs 0.0525 cfs 12.8000 hrs 0.0477 cfs 13.0000 hrs-0.0424 cfs - 13 .2000 hrs 0.0376 cfs 13 .4000 hrs 0.0342 cfs 13 .6000 hrs 0.0313 cfs 13 .8000 hrs 0.0289 cfs 14 .0000 hrs 0.0265 cfs 14.3000 hrs 0 .0240 cfs 14.6000 hrs 0 .0230 cfs Page 1 tmp#16.txt 15.0000 hrs 0 . 0211 cfs 15.5000 hrs 0 . 0191 cfs - 16.0000 hrs 0 .0171 cfs 16.5000 hrs 0 . 0157 cfs 17.0000 hrs 0 .0152 cfs 17.5000 hrs 0 . 0142 cfs - 18.0000 hrs 0.0137 cfs 19.0000 hrs 0.0122 cfs 20.0000 hrs 0 . 0102 cfs 22.0000 hrs 0.0097 cfs 26.0000 hrs 0 .0000 cfs Peak Time and Flow 12 .1000 hrs 0 .4347 cfs Page 2 Hello