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Home My WebLink AboutSW8040426_Historical File_20040722Arnold W. Carson, PLS PC The Milford Building 406 North Third Street RECEI Wilmington, NC 28401 Phone: (910) 772-9113 JUL 0/ Fax: (910) 772-9128 // State of North Carolina Department of Enviromnent and Natural Resources Ms. Linda Lewis, Ewdronmental Engineer 127 North Cardinal Drive Wilmington, NC 28405 RE: REQUEST FOR ADDITIONAL INFORMATION Stormwster Project No. SW8 040426 Courtney Pines, Phase III New Hanover County Dear Linda: July 8, 2004 The following is requested information in order to continue the stormwater review for the subject project. 1 _ The swales have been numbered on the plan to coincide with the supplement. 2. The term "5:1 G.S." has been added to the legend referring to the typical grass swale detail. This subdivision (800+ acres) has been set up for "public" roads from its inception in 1995. In particular, this area with its proximity to Market Street. Unfortunately, NCDOT has had to be very involved in the design of these roads with regards to flumes vs. basins. I would personally like to have flumes with shallow swales also; however, the new NCDOT flume design (included withthis package) requires a 1.8' dropofffrom the edge of pavement to the Swale invert, essentially the same as a catch basin with two (2) 12" pipes. A variance was asked for and received fraan NCDOT for the shallow etch basins, since the standard basin was Yin depth. Another issue with NCDOT was the 6' spread requirement. According to the software program in use by them, a flume would be required on approximately every other lot line to meet the 6' spread rule. As for the 18" pipe crossings on Bow Hmrter Drive, this is another NCDOT issue. The pipe must have 1' of sub -base between its top and the bottom of the curb. Unfortunately, this contributes to the depth of the swales. NCDOT's insistence to have beeper outlet swales has rendered the existing ditches on the north and west property lines useless because they are not and cannot be deepened. Please be wary of any plants that come to you in the future which propose flumes on public roads. I certainly could not make it happen. If you have any questions, please feel free to give me a call. Thank you, Christopher I. Glover, PLS CIG1bmh P. 1 q * * * COMMUNICATION RESULT REPORT ( JUL. 7.2004 12:57PM ) * * * FILE MODE 154 MEMORY TX OPTION REASON FOR ERROR E-1) HANG UP OR LINE FAIL E-3) NO ANSWER ADDRESS (GROUP) ------- 9-7729128 TTI NCDENR WIRO RESULT PAGE OK P. 3r3 E-2) BUSY E-4) NO FACSIMILE CONNECTION State of North Carolina Department of Environment and Natural Resources Wilmington Regional office Michael. F. Easley, Governor William G. Ross Jr., Secretary FAX COVER SHRFT Date: No. Of Pages: , To: Q- ri 5 C Iov - From: Lind 2 L i CO►: CO: pw FAX #: rlz— 91 tS FAX#: 910-350-2004 127 Cardinal Orlve FUCRAon, Wllnlln&n, N.C. 2816"j45 Tal4ph6ne (910) 395.3900 pax (910) 3i0-2004 An Equal Opportunity AMrmatNc Acton Employer OF W ATFR Michael F. Easley, Governor William G. Ross Jr. Secretary co North Carolina Department of Environment and Natural hesources r —� Alan W. Klimek PE.,Director O �C Division ofWiter Quality Coleen H. Sullins, Deputy Director Division of Water Quality July 7, 2004 Mr. Leon Skinner, Vice President Coastal Carolina Developers Inc. 2905 Market Street Wilmington, NC 28403 Subject: Request for Additional Information Stormwater Project No. SW8 040426 Courtney Pines Phase III New Hanover County Dear Mr. Skinner: The Wilmington Regional Office received a Stormwater Management Permit Application for Courtney Pines, Phase III on April 19, 2004. A preliminary review of that information has determined that the application is not complete. The following information is needed to continue the stormwater review: 1. Please number the swales to correspond to the supplement. 2. Please indicate that the "5:1 G.S." label shown in each curb outlet swale refers to the Typical Grass Swale detail. 3. The 4' and 5' deep swales shown on the plans are defeating the intent of the curb outlet swale .option. Where possible, please consider eliminating the catch basins at those deeper swales, and providing a flume in order to shallow up the swales and avoid potential piping problems by the homeowners down the road. Well -grassed shallow swales are also easier to maintain, are more pleasing to look at and do not aid in the propagation of mosquitoes. Please note that this request for additional information is in response to a preliminary review. The requested information should be received by this Office prior to August 7, 2004, or the application will be returned as incomplete. The return of a project will necessitate resubmittal of all required items, including the application fee. If you need additional time to submit the information, please mail or fax your request for a time extension to the Division at the address and fax number at the bottom of this letter. The request must indicate the date by which you expect to submit the required information. The Division is allowed 90 days from the receipt of a completed application to issue the permit. The construction of any impervious surfaces, other than a construction entrance under an approved Sedimentation Erosion Control Plan, is a violation of NCGS 143-215.1 and is subject to enforcement action pursuant to NCGS 143-215.6A. N. C. Division of Water Quality 127 Cardinal Drive Extension (910) 395-3900 Customer Service Wilmington Regional Office Wilmington, NC 28405 (910) 350-2004 Fax 1 800 623-7748 406 North Third Street Wilmington, NC 28401 To: ARNOLD W CARSON, P.L.S., P.C. M Y 1 2004 Phone: -I} Fax: (910) 772-9128 T.FTTF.R OF TRANSMITTAL Date: S 4 /v Y Subject: NO. DATE DESCRIPTION v ✓ ew • O co &le$� ❑ FOR YOUR INFORMATION FOR REVIEW & APPROVAL ❑ FOR APPROVAL ❑ RETURN OF YOUR DOCUMENTS ❑ FOR YOUR USE COMMENTS: SIGNED Ir. CoNi DEN'1''IAL AND PFUNILEGdED: All information contained ir, this document is ropfidential and privileged. It is intended for the sole use of the addressee. Any dissemination, distribution or copying of this document by anyone other than the addressee is prohibited. Ifyou have received thi, in error, please notify the sender immediately and return to the address above. Michael F. Easley, Governor William G. Ross Jr. Secretary North Carolina Department of Environment and Natural hesources FAX COVER SHEET Date: April 28, 2004 To: Chris Glover Company: Arnold W. Carson, PLS FAX #: 772-9128 DWQ Stormwater Project Number: SW8 nla Project Name: Courtney Pines Phase III MESSAGE: Chris: Alan W. Klimek, P.E.,Director Division of Water Quality Coleen H. Sullins, Deputy Director Division of Water Quality No. of Pages: 2 From: Linda Lewis Water Quality Section - Stormwater FAX # 910-350-2004 Phone # 910-395-3900 Please have Mr. Skinner revise the proposed deed restrictions as follows: 1. Section 14 - revise the permit number in the first sentence when it is known. Remove paragraph (vi). This statement is intended to be used only for those high density projects where a wet detention pond or other engineered system is used. Section 15- The responsibility for maintaining drainage easements and swales must fall to the HOA, not the individual homeowners who happen to have a swale adjacent their property. The entire subdivision benefits from a well -maintained drainage system, and it is unfair to saddle two homeowners with the financial responsibility of maintaining a Swale that many upstream homeowners benefit from. Sections 19-23 are repeats of Section 14 (i) - (iv). Please add the two statements regarding the curb outlet system swales, as found in Section II I of the attached document. 2. Item (d) on the low density supplement need not be initialled since the receiving stream is not classified as ORW. RSS\arl: S:1WQS\STORMWATIADDINFO120041courtneypineslll.apr04 N. C. Division of Water Quality 127 Cardinal Drive Extension (910) 395-3900 Customer Service Wilmington Regional Office Wilmington. NC 28405 (910) 350-2004 Fax 1 800 623-7748 A y Arnold W. Carson, PLS PC The Milford Building 406 North Third Street Wilmington, NC 28401 k— �k Phone: (910) 772-9113 APR Fax: (910) 772-9128 19 ?40¢ 1� N State of North Carolina C April 15, 2004 Department of Environment and Natural Resources Ms. Linda Lewis, Environmental Engineer 127 North Cardinal Drive Wilmington, NC 28405 RE: STORMWATER MANAGEMENT PERMIT APPLICATION Courtney Pines, Phase III Dear Ms. Lewis: Courtney Pines, Phase 11, is a 152 lot development with new roads connecting to Whitney Pines and Courtney Pines Subdivisions. The 55.64 acre parcel to be built on is owned by Coastal Carolina Developers, Inc. and is within the original tract for which 252 impervious acres are allotted. (Permit No. SW8 951019). All stormwater will be treated in 5:1 grassed swales before entering the perimeter ditches which, in most cases, are existing and carrying offsite water. The roads are to be public and must meet NCDOT Standards for drainage, details, and materials. NCDOT, at this time, is no longer allowing curb cuts with concrete flumes as we have done in the past. Instead, they are requiring catch basins with one joint of pipe out letting to the swale. This will require a larger easement (40') to accommodate the 5:1 side slopes. There is also minimum piping at one (1) road crossing for transfer of stormwater only. Existing perimeter ditches have existing pipes at five (5) locations for stormwater transfer only and are addressed on previous plans. After this plan, there is very little, if any, land remaining to develop within the 840 acres of the original permit. Totals after this plan are as follows: Of the 840 acres, 722.93 AC are in project areas (totaled from each individual permit) and 117.07 acres are in unregulated ponds and wetland buffers along Smith Creek. The total impervious area is 211.436 acres. The percent impervious area is 29.25% in developed areas and 25.17% for the entire project. Please keep in mind that modifications may occur until each project is built out. If you have any questions, please feel free to give me a call. Thank you, e. �r Christopher I. Glover, PLS CIG/bmh { SWALE 1 Channel Calculator Given Input Data: Shape .,.-____-_.==_=ee.=.....:.. Trapezoidal Solving for ..................... Depth of Flow Flowrate ........................ 4.2800 cfs Slope ........................... 0.0020 ft/ft Manning's n ..................... 0.0300 Height .......................... 3.7000 ft Bottom width .................... 3.0000 ft Left slope ...................... 5.0000 ft/ft Right slope ..................... 5.0000 ft/ft Computed Results: Depth ........................... 0.5992 ft Velocity ........................ 1.1913 fps Flow area ....................... 3.5929 ft2 Flow perimeter .................. 9.1107 ft Hydraulic radius ................ 0.3944 ft Top width ....................... 8.9921 ft Area ............................ 79.5500 ft2 Perimeter ............. 40.7327 ft Percent full .................... 16.1948 % N•.• CAR0C''�i,• `wept �......... / • •�SSIp •.+- '•,� :4 gEAL C L-4090 :r 0. SUS! 00 • •• •........ •• ,,' GO � Sr SWALE 2 Channel Calculator Given Input Data: Shape........................... Trapezoidal Solving for ..................... Depth of Flow Flowrate ........................ 2.3400 cfs Slope ........................... 0.0020 ft/ft Manning's n ..................... 0.0300 Height .......................... 3.7000 ft Bottom width .................... 3.000Q ft Left slope ...................... 5.0000 ft/ft Right slope ..................... 5.0000 ft/ft Computed Results: Depth ........................... U.44Jy tt Velocity ........................ 1.0099 fps Flow area ....................... 2.3170 ft2 Flow perimeter .................. 7.5270 ft Hydraulic radius ................ 0.3078 ft Top width ....................... 7.4391 ft Area ............................ 79.5500 ft2 Perimeter ....................... 40.7327 ft Percent full .................... 11.9976 % SWALE 3 Channel Calculator Given Input Data: Shape ........................... Trapezoidal Solving for ..................... Depth of Flow Flowrate ........................ 3.3600 cfs Slope ........................... 0.0020 ft/ft Manning's n ..................... 0.0300 Height .......................... 3.7000 ft Bottom width .................... 3.0000 ft Left slope ...................... 5.0000 ft/ft Right slope ..................... 5.0000 ft/ft Computed Results: Depth ........................... O.5J21 tt Velocity ........................ 1.1157 fps Flow area ....................... 3.0117 ft2 Flow perimeter .................. 8.4260 ft Hydraulic radius ................ 0.3574 ft Top width ....................... 8.3206 ft Area ............................ 79.5500 ft2 Perimeter ....................... 40.7327 ft Percent full .................... 14.3801 % a SWALE 4 Channel Calculator Given Input Data: Shape ........................... Trapezoidal Solving for ..................... Depth of Flow Flowrate ........................ 2.2400 cfs Slope ........................... 0.0020 ft/ft Manning's n ..................... 0.0300 Height .......................... 3.7000 ft Bottom width .................... 3.0000 ft Left slope ...................... 5.0000 ft/ft Right slope ..................... 5.0000 ft/ft Computed Results: Depth ........................... 0.4342 tt Velocity ........................ 0.9977 fps Flow area ....................... 2.2452 ft2 Flow perimeter .................. 7.4279 ft Hydraulic radius ................ 0.3023 ft Top width ....................... 7.3419 ft Area ............................ 79.5500 ft2 Perimeter ....................... 40.7327 ft Percent full .................... 11.7348 % SWALE 5 Channel Caicuiazoz Given Input Data: Shape ............................ Trapezoidal Solvinq for ..................... Depth of Flow Flowrate ........................ 3.1400 cfs Slope ........................... 0.0020 ft/ft Manning's n ..................... 0.0300 Height .......................... 3.7000 tt Bottom width .................... 3.0000 ft Left slope ...................... 5.0000 ft/ft Right slope ..................... 5.0000 ft/ft Computed Results: Depth ........................... U.514b tt Velocity ........................ 1.0952 fps Flow area ....................... 2.8610 tt2 Flow perimeter .................. 8.2468 ft Hydraulic radius ................ 0.3476 ft Top width ....................... 8.1449 ft Area ............................ 79.5500 ft2 Perimeter ....................... 40.7327 ft Percent full .................... 13.9052 % SWALE 6 cnannei i;aic uia zor Given Input Data: Shape ........................... Trapezoidal Solvznq for ..................... Depth of Flow Flowrate ........................ 3.9500 cfs slope ........................... 0.0020 ft/ft Mannina's n ..................... 0.0300 height✓ .......................... 3.iUUU tt Bottom width .................... 3.0000 ft Left slope ...................... 5.0000 ft/ft Right slope ..................... 5.0000 ft/ft uomputed Results: Depth ........................... u.5"I6Z tt Velocity ........................ 1.1657 fps Flow area ....................... 3.3884 ft2 Flow perimeter .................. 8.8758 ft Hydraulic radius ................ 0.3818 ft Top width ....................... 8.7617 ft Area ............................ 79.5500 ft2 Perimeter ....................... 40.7327 ft Percent full .................... 15.5723 % SWALE 7 Channel Calculator Given Input Data: Shape........................... Trapezoiaal Solvina for ..................... Depth of Flow Flowrate ........................ 3.7700 cfs Slope ........................... 0.0020 ft/ft Manning's n ..................... 0.0300 Height .......................... 3.7000 ft Bottom width .................... 3.0000 ft Left slope ...................... 5.0000 ft/ft Right slope ..................... 5.0000 ft/ft Computed Results: Depth ........................... U.56:i1 tt Velocity ........................ 1.1511 fps Flow area ....................... 3.2751 ft2 Flow perimeter .................. 8.7429 ft Hydraulic radius ................ 0.3746 ft Top width ....................... 8.6314 ft Area ............................ 79.5500 ft2 Perimeter ....................... 40.7327 ft Percent full .................... 15.2200 % SWALE 8 channei caicuiafor Given Input Data: Shape ........................... Trapezoiaa.l Solvina for ..................... Depth of Flow Flowrate ........................ 2.550:0 cfs Slope ........................... 0,0020 ft/ft Manning's n ..................... 0.0300 Height .......................... j.'NOU =t Bottom width .................... 3.0000 ft Left slope ...................... 5.0000 ft/ft Right slope ..................... 5.0000 ft/ft Computed nesuits: Depth ........................... U.4bJb rt Velocity ........................ 1.0343 fps Flow area ....................... 2.4b55 ft2 Flow perimeter .................. 7.7279 ft Hydraulic radius ................ 0.3190 ft Too width ....................... 7.6361 ft Area ............................ 79.5500 ft2 Perimeter ....................... 40.7327 ft Percent full .................... 12.5299 % SWALE 9 i 1,11Ai111 C.1 i..+Q.11.. L114 Llii Given Input Data; Shape ........................... Trapezoiaai Solvina for ..................... Depth of Flow Flowrate ........................ 3.2500 cfs Slope ............................ 0.0020 ft/..ft Manning's n ..................... 0.0300 lei g nt . . . . . . . . . . . . . . . . . . . . . . . . . . J . / V V €% it Bottom width .................... 3.0000 ft Left slope ...................... 5.0000 ft/ft Right slope ..................... 5.0000 ft/ft uomputea Results Depth ........................... 0.5234 it Velocity ........................ 1.1056 fps Flow area ....................... 2.939b =2 Flow perimeter .................. 8.3373 ft Hydraulic radius ................ 0.3526 ft Top width ....................... 8.2336 ft Area ............................ 79.5500 ft2 Perimeter ......... I.... - ...... 40.7327 ft Percent full .................... 14.1449 % SWALE 10 Channel Calculator Given Input Data: Shape ........................... Trapezoidal Solving for ..................... Depth of Flow Flowrate ........................ 3.4900 cfs Slope ........................... 0.0020 ft/ft Manning's n ..................... 0.0300 Height .......................... 3.1000 tt Bottom width .................... 3.0000 ft Left slope ...................... 5.0000 ft/ft Right slope ..................... 5.0000 ft/ft Computed Results: Depth ........................... 0.5421 ft Velocity ........................ 1.1273 fps Flow area ....................... 3.0960 tt2 Flow perimeter .................. 8.5288 ft Hydraulic radius ................ 0.3630 ft Top width ....................... 8.4214 ft Area ............................ 79.5500 ft2 Perimeter ....................... 40.7327 ft Percent full .................... 14.6525 % SWALE 11 unannex C;aicuiator Given Input Data: Shape........................... Trapezoidal Solvina for ..................... Depth of Flow Flowrate ........................ 2.4300 cfs Slope . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.0020 ft/ft Manning's n ..................... U.U3UU Height .......................... 3.iouii ft Bottom width .................... 3.0000 ft Left siope ...................... 5.0000 ft/ft Right slope ..................... 5.0000 ft/ft Computed Resuits: Depth ........................... 0.4525 ft Velocity ........................ 1.0206 fps Flow area ....................... 1.3810 ft2 Flow perimeter .................. 7.6143 ft Hydraulic radius ................ 0.3127 ft Top width ....................... 7.5247 ft Area ............................ 79.5500 ft2 Perimeter ....................... 40.7327 ft Percent full .................... 12.2289 % SWALE 1, Given Input Data: Shape........................... Trapezoidal -lviaw fur ..................... Deoth of Flaw Flowrate ........................ 2.6700 cfs Slope ......................... 0.0-020 ft/ft Mahning`s n ..................... 0.0300 Height .......................... iUVU Lt. Bottom width .................... 3.0000 ft Left slope ...................... 5.0000 ft/ft Right slope ..................... 5.0000 ft/ft computed results: Depth ........................... 0.4745 ft Velocity ........................ 1.0475 fps Flow area ....................... 1.5489 tt2 Flow perimeter .................. 7.8385 ft Hydraulic radius ................ 0.3252 ft Top width ....................... 7.7445 ft Area ............................ 79.5500 ft2 Perimeter ................. 40�7327 ft Percent full .................... 12.8231 % Given Input Data: -j iapai . . . . . . . . . . . . . . . . . . . . . . . . . . zrapezoiciQ1 ::,1 Y in u for ............... . , .... Depth of Flow Flowrate ........................ 5.3000 cfs Slope ........................... 0-.002v ftifft Manning's n ..................... U.UJUU .......................... ..5. /VVU iL Bottom width .................... 3.0000 ft Lett slope ...................... 5.UU00 ft/ft Right slope ..................... 5.0000 ft/ft Uomputea xesults: Depth ........................... U.6645 ft Velocity ........................ 1.2615 fps Flow area ....................... 4.2014 ttZ Flow perimeter .................. 9.7767 ft Hydraulic radius ................ 0.4297 ft Top width ....................... 9.6451 ft Area ............................ 79.5500 ft2 Perimeter ....................... 40.7327 ft Percent full .................... 17.9598 % SWALE 14 channel calculauui Given input Data: Shape........................... Trapezoidal Solvino for ..................... Depth of Flow Flowrate ........................ 4.1500 cfs Slope ........................... 0.0020 ft/ft Manning`s n ..................... 0.0300 Height .......................... 3.7000 ft Bottom width .................... 3.0000 ft Left slope ...................... 5.0000 ft/ft Right slope ..................... 5.0000 ft/ft Computed Results: Depth ........................... U.59U3 ft Velocity ........................ 1.1814 fps Flow area ....................... 3.5128 ft2 Flow perimeter .................. 9.0195 ft Hydraulic radius ................ 0.3895 ft Top width ....................... 8.9025 ft Area ............................ 79.5500 ft2 Perimeter ....................... 40.7327 ft Percent full ................i... 15.9529 % SWALL 15 Channel Calculatoz Given Input Data: Shape........................... Trapezoidal Solvina for ..................... Depth of Flow Flowrate ........................ 3.5700 Us Slope ........................... 0.0020 ft/ft Manning's n ..................... 0.0300 Height .......................... 3.7000 ft Bottom width .................... 3.0000 ft Left slope ...................... 5.0000 ft/ft Right slope ..................... 5.0000 ft/ft Computed Results: Depth ........................... U.b4b2 It Velocity ........................ 1.1342 fps Flow area ....................... 3.1475 ft2 Flow perimeter .................. 8.5909 ft Hydraulic radius ................ 0.3664 ft Top width ....................... 8.4824 ft Area. ............... ........... 79.5500 ft2 Perimeter ....................... 40.7327 ft Percent full .................... 14.8172 % S ALE 16 t-_.iid llilIL,a r el t. all l: Lil ct i.Vi Given input Data: Shape ........................... Trapezoidal Solving for ..................... Deoth of Flow Flowrate ........................ 2.3800 cfs Slope ........................... 0.0020 ft/ft manning -s n ..................... 0.0300 ieiuht .. .......... ... . . . . .. ..... . 7 t1ui1 ft Bottom width .................... 3.0000 ft Left slope ...................... 5.0000 ft/ft Right slope ..................... 5.0000 ft/ft CComuuted Results: Depth ........................... 0.4477 ft Velocity ........................ 1.0147 fps Flow area ....................... 2.3456 ft2 Flow perimeter .................. 7.5660 ft Hydraulic radius ................ 0.3100 ft Top width ....................... 7.4774 ft Area ............................ 79.5500 ft2 Pe.r.i.meter. ....................... 40.7327 ft Percent full .................... 12.1010 % A-w7k z ,;, t ^3 ;;nannez t;aicuia"cor f.:i vran 1 nr�ia-ir Mara _--ShapF, ........ _.................. Trapezoidal ✓.r + .�. .5. . . . . . . . . . . . . . . . . . . . . • r11- LGVL1.1 V1 Flow ni t-.. 3.1400 cfs Slope ........................... 0.002?UJ ± I/s-E Manning's n ................0.... 0.0300 rieigrit .......................... .5.IVUU tt bottom width .................... 3.0000 ft Left siooe ...................... 5.0000 ft/ft Hight slope ..................... 5.0000 ft/ft uomputea .results Depth ........................... U.514,) tt Velocity ........................ 1.0952 fps Plow area ....................... 2.8b/U tt2 Plow perimeter .................. 8.2468 ft Hydraulic radius ................ 0.3476 ft Top width ....................... 8.1449 ft Area ............................ 79.5500 ft2 Perimeter ....................... 40.7327 ft Percent full .................... 13.9052 - NTj�T 7 LE 11C ,_nanrie o -:aIc --- -o-- given Lnput uata: ::;',ape ............ ".� , t rape Z vi ua i _ . ... . . . .. . . . . Dewth of Flow Flowrate ........................ 3.3400 cfs Slope........................... U.4UZU it/tt manning-s n ..................... u.uluu H e l CTFi t . . . . . . . . . . . . . . . . . . . .5. / U U U it mottom width .................... 3.0000 ft 1,ert slope ...................... O.uuuu ft/ft Hight slope ..................... 5.0000 ft/ft Computed Results: Depth ........................... u.5:505 rt Velocity ........................ 1.1139 fps Flow area ....................... 2.9986 ft2 Flow perimeter .................. 8.4100 ft Hydraulic radius ................ 0.3566 ft Top width ....................... 8.3049 ft Area ............................ 79.5500 ft2 Perimeter ....................... 40.7327 ft Percent full .................... 14..3377 % SUALE 19 kc,nannei ca.icuiu%C)r uiven input uata: :nano ........................... Trapezoidal Solvinc for ..................... Denth of Flow Flowrate ........................ 2.3600 cfs Slope ........................... 0.00ZU rc/rt manning-s n ..................... u-JUJU u hei gl'lt . . . . . . . . . . . . . . . . . . . . . . . . . . J . / U U U t t bottom width .................... 3.0000 ft Lert siope ...................... 5.uuuu tt/ft Right slope ..................... 5.0000 ft/ft (;omvutea Resuits Depth ........................... u.44bb tt Velocity ........................ 1.0123 fps Flow area ....................... 2.331:i 3-t2 Flow perimeter .................. 7.5466 ft Hydraulic radius ................ 0.3089 ft Ton width ....................... 7.4583 ft Area ............................ 79.5500 ft2 Perimeter ....................... 40.7327 ft Percent full .................... 12.0495 % SWAT .r 'C l-;naiincI ic,iicul it i. r even input uaia Shane ............................. 'I`ranezo-oal .... J. . y...... .. . . . . . . . . . . . . . . . . . . . . . �, or ww - L' Flow 7-1i-sw_ate ........................ 5.5500 cfs Siopea . ... .. .. . .. ............ . ... L%•Z% LV nanning;s n ..................... u.u.suu he]-giiz .......................... -D.Z000 Tt Bottom width .................... .3.0000 ft Leif slope ...................... 5.0000 ft/ft Right slope ..................... 5.0000 ft/ft i;ori►pur-ea Kesu izs : y Deptli ........................... 0.6794 ft Velocity ........................ 1.2771 fps Flowarea ....................... 4.34,:aj rcz Flaw perimeter .................. 9.9283 ft Hydraulic radius ................ 0.4377 ft Ton width ....................... 9.7938 ft Area ............................ 150.8000 ft2 Perimeter ....................... 56.0298 ft Percent full .................... 13.0649 % i M --- ,� - - Given input Daia .............. i raoezoiaal -- .<--- `=- ..................... nc I of Flow Flowrate ........................ 6.6000 cfs :lope ........................... U.UUGU YtiiL Manning's n ..................... 0.0:300 .................... :s.2iiiiu it rsottom width .................... 3.0000 ft Left slope ...�.................. 5.0000 ft/ft Right slope ..................... 5.0000 ft/ft k-Oinputed rResuits : Depth ........................... U./3/9 tt Velocity ........................ 1.3371 fps Flow area ....................... 4.9359 ft2 Flow perimeter .................. 10.5248 ft Hydraulic radius ................ 0.4690 ft Top width ....................... 10.3787 ft Area ............................ 150.8000 ft2 Perimeter ....................... 56.0298 ft Percent full .................... 14.1898 0 5t ALE 24 V 11 c111iSE1 i. a.l.cuJ. ci i.ii Given input Data: Share ........................... Trapezoidal ^��,3 csi nn frlr . . . . . . . . . . ... . .. . . . . . T1oM+ h of Fl nrti Flo:•;rate ........................ 8.6000 cfs Slope ........................... O.UU1U ttitt Manning's n ..................... 0.0300 LI C l gn t . . . . . . . . . . . . . . . . . . . . . . . 6.2000 ft Bottom width .................... 3.0000 ft Left slope ...................... 5.0000 ft/ft Right slope ..................... 5.0000 ft/ft Computed Results: Depth ........................... U.8:Jb'/ tt Velocity ........................ 1.4336 fps Flow area ....................... 5.998`8 ft2 Flow perimeter .................. 11.5223 ft Hydraulic radius ................ 0.5206 ft Top width ....................... 11.3568 ft Area ............................ 150.8000 ft2 Perimeter 56.0298 ft Percent full .................... 16.0708 % t;��arirnel Ua-LcuidL(-) ulven inuut Data: �har)c .. Trnr�cvn; A=I r . . . . . . . .. . . . . . . . . . ..r, r� .� F„r. ..................... Tenth of Flog? Flowrate ........................ 4.9600 cfs Slope ........................... 0.0020 ft/ft Manning.s n ..................... u.ujuu tieiCan,c .. ...... . ......... ... .. .. 4 . / vvQ ft Bottom width .................... 3.0000 ft Left slope ...................... 5.0000 ft/ft Right slope ..................... 5.0000 ft/ft Computed Results: lle-oth ........................... U.bC$6 tt Velocity ........................ 1.2393 fps Flow area ....................... 4.0021 ft2 Flow perimeter .................. 9.5637 ft Hydraulic radius ........ 0....... 0.4185 ft Too width ....................... 9.4362 ft Area ............................ 124.5500 ft2 Perimeter ....................... 5.0.9308 ft Percent full .................... 13.6941 % S`S1?z � 4..;`. C--,hannei C:aicu.iatoL- Given Input Data: Shane Trapezoidal _ -- .. _ . --- . . . . .. . . . . . . . . . . . . . . ✓CT"'�}? rf ago?'? Flowrate ........................ 1.8800 cfs Slope ........................... 0.0020 ft/ft Manning ' s n . . . . . . . . . . . . . . . . . . . . . O . U 3 U O Heiaht .......................... s."/UUU ft Bottom width .................... 3.0000 ft Left slope ...................... 5.0000 ft/ft Right slope ..................... 5.0000 ft/ft Computed Results: Depth ........................... 0.397U tt Velocity ........................ 0.9499 fps Flow area ....................... 1.9792 ft2 Flow perimeter .................. 7.0489 ft Hydraulic radius ................ 0.2808 ft Top width ....................... 6.9703 ft Area ............................ 79.5500 ft2 Perimeter ....................... 40.7327 ft Percent full .................... 10.7304 % SHAD 2� Channel Calculator Given input Data: Shape........................... Trapezoidal Soly?no for ..................... Deoth of Flow Flowrate ........................ 4.1100 cfs Slope ........................... 0.0020 ft/ft manning's n ..................... 0.03UU Height .......................... 3.7000 ft Bottom width .................... 3.0000 ft Left slope ...................... 5.0000 ft/ft Right slope ..................... 5.0000 ft/ft Computed Results: Depth ........................... U.5875 It Velocity ........................ 1.1783 fps Flow area ....................... 3.4880 ft2 Flow perimeter .................. 8.9911 ft Hydraulic radius ................ 0.3879 ft Top width ....................... 8.8747 ft Area ............................ 79.5500 ft2 Perimeter ....................... 40.7327 ft Percent full .................... 15.8777 % SWALE 3( :.-annex L:uiLii �7i iJ1 uiven input Liata Shape ......... ................ 'prapezoidal r ,l tr; r,ry for .... ................ Depth .o f Flow Flowrate ........................ 2.4000 ofs Slope ........................... 0.0020 ft/ft manning-s n ..................... u.u.iuu Yf e -L . .......................... 3 . f U- C) Q f t Bottom width .................... 3.0000 ft Lett slope ...................... ).000U ttift Right slope ..................... 5.0000 ft/ft C:omDu%ed Results: Depth........................... U.44yb LL Velocity .......................• 1.0170 fps Flow area ....................... 2.3598 ft/--- Flow perimeter .................. 7.5854 ft Hydraulic radius ................ 0.3111 ft Top width ....................... 7.4964 ft Area ............................ 79.5500 ft2 Perimeter ....................... 40.7327 ft Percent full .................... 12.1523 % 3t�ALE 3 unannei uaicuiaro_r uiven input uata: Shape.......... .. ...... t - - —rs rr.-.r-rv'at - _ ^ .. .. . . . . . . . . . . . . . . . . . Y� ni= �+`!r% Flowrate ........................ 2.5300 cfs Slope ........................... 0.0020 itt/ft inanning•s n ..................... u.u.suu rieignL.......................... J.Iuuu tL Bottom width .................... 3.0000 ft Lett slope ...................... n.uuuu rt/ft Might slope ..................... 5.0000 ttift l.ompuLea Kesuits : Depth ........................... 0.4618 ft Velocity ........................ 1.0.320 fps Fiow area ....................... 2.4bib it2 Flow perimeter .................. 7.7092 ft Hydraulic radius ................ 0.3180 ft Top width ....................... 7.6177 ft Area ............................ 79.5500 ft-9- Perimeter ....................... 40.7327 ft Percent full .................... 12.4803 % 5MAI T Cnannei Caicuiaza-L Given inpur liana: Shape.....__ ................... Trapezoidal salt' i nu for .. . . . . . . . . . . . . . . . . . . . Death of A'7 w Flowrate ........................ 3.7500 cfs Slope ........................... 0.0020 ft/ft Manning=s n ..................... 0.0300 Height .......................... 3.iU00 tt Bottom width .................... 3.0000 ft Left slope ...................... 5.0000 ft/ft Right slope ..................... 5.0000 ft/ft Computed Resuits: Depth ........................... 0.5617 ft Velocity ........................ 1.1495 fps Flow area ....................... 3.2624 U2 Flow perimeter .................. 8.7280 ft Hydraulic radius ................ 0.3738 ft Top width ....................... 8.6167 ft Area ............................ 79.5500 ft2 Perimeter ....................... 40.7327 ft Percent full .................... 15.1803 % CQ &14-TIONS r/S E'1b �N.D S ♦4MPC C tfLC c4(,*j loA) WIT, -64 Ao.0 3 So4-��c� — aCa•o 3j - 3i$ r I ! AND U_ A S6fz Ab L A dra.o4 VL areal. 50: 1 Sr �' Scar5 r r E6t-72-6, '•' �I V-0600 Z ` 0,29� v-- A= . �' —^ A GI2 11 Sao. 7Z) I , 2714 r+lfec. SAMPLE CHECK Channel Calcuia ur Given Input Data: Shape _.......................... .................... Trapezoidal Solving for ..................... Deoth of Flow Flowrate ........................ 5.0000 cfs Slope ........................... 0.0020 ft/ft Manning's n ..................... 0.0300 Height .......................... j.7000 ft Bottom width .................... 0.0000 ft Left slope ...................... 5.0000 ft/ft Right slope ..................... 5.0000 ft/ft Computed Results: Depth ........................... 0.8869'ft Velocity ........................ 1.2714 fps Flow area ....................... 3.9326 ft2 Flow perimeter .................. 9.0443 ft Hydraulic radius ................ 0.4348 ft Top width ....................... 8.8686 ft Area ............................ 68.4500 ft2 Perimeter ....................... 37.7327 ft Percent full .................... 23.9693 %