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HomeMy WebLinkAboutSite DrainageCIVIL AND STRUCTURAL ENGINEERING PROVIDING QUALITY ENGINEERING SERVICES TO THE TREASURE VALLEY AND BEYOND SINCE I994. SITE DRAINAGE FOR ASSISTED LIVING for the LARKSPUR SOUTHWOODS East Calderwood Drive Meridian, Idaho Ron Sargent 4915 West Camas Boise, Idaho 83705 (208) 37 1 -61 10 by Lance Warnicic, P.E. Project Manager Treasure Valley Engineers, Inc. Gregory Anderson, E.I.T. Design Engineer Treasure Valley Engineers, Inc. Treasure Valley Engineers, Inc. .568{) E. Fraukliri Rd, Suite 22U :�tampa, Idaho �36�7 Phone: (?08) 463-0305 Fay:: (20$1463-4391 t��ir1�. TYeas�u•eValleyEngineers.eom I VALEY E Calculation Cover Sheet Cale. Number: 04082 Project Number: 04082 Discipline: CIVIL Number of Sheets: 17 (Includes cover sheet and table of contents) Project: Larkspur Southwoods E. Calderwood Dr. Meridian, Idaho Client: Ron Sargent 4915 W Camas Boise, Idaho 83705 Feature: SITE DRAINAGE FOR ASSISTED LIVING Item: SURFACE WATER CONTROLS Sources of Data: I. CH2M Hill, Inc. Urban Runoff Control Handbook for Ada and Canyon Counties, Idaho Ada/ t��b,' Treatment Management Committee, January, 1977.r 2. Site Topo Provided By Treasure Valley Engineers (March 2004). 3. Associated Earth Sciences, Soil Evaluation for Tiburon Meadows Subdivision (April 20 4)v/U�/ 4, Ada County Highway District. Development Policy Manual. December 1999, Of Sources of Fonnulae and References: 1. Viessman, Warren, Jr., et al, 1977. Introduction to Hydrology, Second Edition, Harper & Row, Publishers, Inc.. 2. Idaho Standard Public Works Construction Committee, 2003. Idaho Standards For Public Works Construction, 2003 Edition. ❑ Preliminary Calculation ❑ Final Calculation Supersedes Calculation Number Rev. No. Revision Calculation By Date Checked By Date Approved By Date A Issue for Approval GJA 10/04/2004 Treasure Valley Engnreers, Inc. 5680 E. Franldnr Road, Suite 220 Nampa, Idaho 53687 Pl:or:e: (208) 463-0305 Fax: (208) 463-4391 Email: mail rr Treasrn eValleyEngineers.con: VAI,LEYE�� � Treasure Valley Engineers, Inc. Ilh' �1 Civil / Structural Engineering, Land Surveying 5680 E. Franklin Rd.. Suite 220 Phone (208) 463-0305 Nampa, Idaho 83687 Fax (208) 463-4391 E-Mail: mail@Ti-easureValleyEngineers.com Project LARKSPUR ASSISTED LIVING CENTER Project No. 04082 Feature SITE GRADING AND DRAINAGE Designed GJA Item STORM WATER CALCULATIONS Checked Description Site Layout Showing Drainage Areas Runoff Calculations for Drainage Area 1 Runoff Calculations for Drainage Area 2 Runoff Coefficients and Storm Intensity Soils and Site Information Sand / Oil Trap Specifications TABLE OF CONTENTS Section 1 2 3 Appendix A Appendix B Appendix C Sheet 3 4 0 C.1 - C.2 Sheet Date storm.xls 10/4/2004 3:32 PM GAS VALVES IRR. B %------------ S 89059'2 E _ X- 60.01 - - - — — — — — — — — — — I O w I Lorto \\\\ 11 Lor s � II co W LOT B 0 W O In In O r.II �I LOT 7 I I i 1 �I I 1 v' LOT 6 1 I � I I 5 89059' 6wE _ 60.0 �I IRR. BOX NBc I I I Ie I I 2� f v� d' N I m I m M 1 I vl i I � 1 t0 v� } 1 Q I � I � C9 1 = I G EG �I o ' Q I m pl 1 3 i I- W I in I :n rn1 � vl I 1 I I � I I \\ LOT 16 1 / I � LOT LOT 16 / LOT n I /I LOT 19 M / d m Z ` \ iLCrr 20 / \ Q LOT 21 K LOT 35 LOT 22 LOT 23 w I j co - - m 4 n LOT 36 I C) 6] LOT 24 z LOT 37 I LOT 25 Project Feature Item Treasure Valley Engineers, Inc. Civil / Structural Engineering, Land Surveying 5680 E. Franklin Rd., Suite 220 Phone (208) 463-0305 Nampa, Idaho 83687 Fax (208) 463-4391 E-Mail: mail@Treasurer'alleyEngineers.con: LARKSPUR ASSISTED LIVING CENTER Project No. SITE GRADING AND DRAINAGE Designed STORM WATER CALCULATIONS Checked 2. RUNOFF CALCULATIONS FOR DRAINAGE AREA 1 A. FIND TIME OF CONCENTRATION (tc) 04082 Sheet GJA Date Assume: The time of concentration (tc) for this area is defined as the time needed to reach the grease trap from the point that is farthest away. 50 feet of this flow is over the landscape section (C=0.20), 5 feet is over the sidewalk and curb (C=.95) and the remaining flow is the gutter (C=0.95). Solution: Time of concentration (tc) = 1.8*(1.1-C')*(D^1/2; FAA (1970) C' D S tc See Sheet 3 0.20 50 2.0%a 9.1 0.95 5 2.0% 0.5 0.95 350 0.4% 6.9 Total 16 Time of concentration (tc) = 16 min B. FIND PEAK DISCHARGE (Q) Design Storm 50-yr, 16-min Using the Rational Method (Q =CIA) for the 50-yr, 16-min storm which is the estimated time of concentration. C Runoff Coefficient Intensity A Drainage Area Q Discharge = C*I*A C. FIND FLOW THROUGH DRAIN PIPE Pipe Diameter (D) Pipe flow area (A) = pi * D^2 / 4 = Roughness coefficient (n) = Hydraulic Radius (R) = D/4 Slope (s) = 0.80 2.2 in/hr 2.45 acres 4.31 cfs 12 in 0.79 ftz 0.009 0.250 feet 0.80% Flow (q) _ [1.49 / n * A * R^2/3 * s10.51 Flow (q) = 4.62 cfs Flow (q) > Peak Discharge (Q)? D. FIND VELOCITY IN GREASE TRAP (v) Grease Trap Size wt Trap Width d Distance Between Baffles a Flow Area = wt*d v Velocity = Q/a YES 1,500 gal 4.00 ft 28 in 9.33 sf 0.46 fps See Appendix A.1 See Appendix A.3 See Sheet 3 See Appendix C.1 Modified 28" Baffle Spacing storm.xls Velocity YES 10/4/2004 1:46 PM S�EVI,I,EYE���E� Treasure Valley Engineers, Inc. U1W ll Civil / Structural Engineering, Land Surveying 5680 E. Franklin Rd., Suite 220 Phone (208) 463-0305 Project Feature Item Nampa, Idaho 83687 Fax (208) 463-4391 E-Mail: mail@Ti-easureValleyEngineeis.conn LARKSPUR ASSISTED LIVING CENTER Project No. SITE GRADING AND DRAINAGE Designed STORM WATER CALCULATIONS Checked E. FIND EXPECTED RUNOFF VOLUME (Vr) 04082 GJA Using the Rational Method (Q =CIA) for the 50-yr, 1-hr storm which is the estimated time of concentration. C Runoff Coefficient I Intensity A Drainage Area Q Discharge = C*I*A t Duration Vr Runoff Volume = Q*t F. FIND SEEPAGE BED PROPERTIES H Height W Width L Length Vb Rock Volume = He*W*L Vs Storage Volume = Vb*0.4 .................... 0.80 0.9 in/hr 2.45 acres 1.76 cfs 3.5 ft 33 ft 141 ft 16,286 cf G. CHECK AVAILABLE STORAGE > RE(�UIRED STORAGE (V) Va Available Storage Volume 6,514 cf V Required Volume 6,350 cf Available > Required? YES H. CHECK CAPACITY USING PERCOLATION OVER 24 HOUR PERIOD Vr Runoff Volume 6,350 cf W Width 33 ft L Length 141 ft Ap Percolation Area = W*L 4,653 sf r Percolation Rate 1 in/hr t Time to Percolate = Vr/(Ap*r/12) 1.6 hr Percolation Time < 24 hr? OK Sheet Date Date Design Storm 50-yr, 1-hr See Appendix A.1 See Appendix A.3 (100-yr, 1-hr Storm) See Sheet 3 See ACHD Section 8006.1 Seepage Bed #1 = 3.5' x 33' x 141' Bottom Area of Bed See Appendix B.1 and 6.4 storm.xls 10/4/2004 1:46 PM Treasure Valley Engineers, Inc. Civil /Structural Engineering,Land Surveying (� 5680 E. Franklin Rd., Suite 220 Phone (208) 463-0305 Nampa, Idaho 83687 Fax (208) 463-4391 E-Mail: nrail@Ti•eastu•eValleyEr:gineers.com Project LARKSPUR ASSISTED LIVING CENTER Project No. 04082 Sheet_ Feature SITE GRADING AND DRAINAGE Designed GJA Date Item STORM WATER CALCULATIONS Checked Date 3. RUNOFF CALCULATIONS FOR DRAINAGE AREA 2 A. FIND TIME OF CONCENTRATION (tc) f� Assume: The time of concentration (tc) for this area is defined as the time needed to reach the grease trap from the point that is farthest away. 50 feet of this flow is over the landscape I section (C=0.20), 5 feet is over the sidewalk and curb (C=.95) and the remaining flow is the gutter (C=0.95). Solution: Time of concentration (t C' D S 0.20 50 2.0% 0.95 5 2.0% 0.95 200 0.4% Total tc See Sheet 3 9.1 0.5 5.2 15 Time of concentration (tc) = 15 min B. FIND PEAK DISCHARGE (Q) Design Storm 50-yr, 15-min Using the Rational Method (Q = CIA) for the 50-yr, 15-min storm which is the estimated time of concentration. C Runoff Coefficient I Intensity A Drainage Area Q Discharge = C*I*A C. FIND FLOW THROUGH DRAIN PIPE Pipe Diameter (D) Pipe flow area (A) = pi * D^2 / 4 = Roughness coefficient (n) = Hydraulic Radius (R) = D/4 Slope (s) = 0.80 2.2 in/hr 0.47 acres 0.83 cfs 12 in 0.79 ft2 0.009 0.250 feet 0.20% Flow (q) _ [1.49 / n * A * R112/3 * s^0.5] Flow (q) = 2.31 cfs Flow (q) > Peak Discharge (Q)? D. FIND VELOCITY IN GREASE TRAP (v) Grease Trap Size wt Trap Width d Distance Between Baffles a Flow Area = wt*d v Velocity = Q/a YES 1,500 gal 4.00 ft 8 in 2.67 sf 0.31 fps See Appendix A.1 See Appendix A.3 See Sheet 3 See Appendix C.1 Modified 8" Baffle Spacing Velocity storm.xls YES 1.0/5/2004 12:40 PM jfRG�ALLEY G � Treasure Valley Engilleers, Inc. UU�1�W �"tU Civil / Structural Engineering, Land Surveying 5680 E. Franklin Rd., Suite 220 Phone (208) 463-0305 Nampa, Idaho 83687 Fax (208) 463-4391 E-Mail: mail@TreasureValleyEngineers.com Project LARKSPUR ASSISTED LIVING CENTER Project No. reature GR SITE ADING AND DRAINAGE Item STORM WATER CALCULATIONS E. FIND EXPECTED RUNOFF VOLUME (Vr) Designed_ Checked 04082 GJA Using the Rational Method (Q =CIA) for the 50-yr, 1-hr storm which is the estimated time of concentration. C Runoff Coefficient I Intensity A Drainage Area Q Discharge = C*I*A t Duration Vr Runoff Volume = Q*t F. FIND SEEPAGE BED PROPERTIES H Height W Width L Length Vb Rock Volume = He*W*L Vs Storage Volume = Vb*0.4 ...................... .................. 0:80' 0.9 in/hr 0.47 acres 0.34 cfs Oft 16ft 50 ft 3,200 cf G. CHECK AVAILABLE STORAGE > REQUIRED STORAGE (V) Va Available Storage Volume 1,280 cf V Required Volume 11218 cf Available > Required? YES H. CHECK CAPACITY USING PERCOLATION OVER 24 HOUR PERIOD Vr Runoff Volume 1,218 cf W Width 16 ft L Length 50 ft Ap Percolation Area = W*L 800 sf r Percolation Rate 1 in/hr ................... . t Time to Percolate = Vr/(Ap*r/12) 18 hr Percolation Time < 24 hr? OK Sheet Date Date Design Storm 50- r, 1-hr See Appendix A.1 See Appendix A.3 (100-yr, 1-hr Storm) See Sheet 3 See ACHD Section 8006.1 Seepage Bed #1 = 4' x 16' x 50' Bottom Area of Bed See Appendix B.1 and B.4 storm.xls 10/5/2004 12:40 PM EXHIBIT /A\ Recommended "C" Coefficients for "Rational Method Equation" Peak Rate of Discharge Description of Run Off Area Runoff Coefficients Business Downtown areas 0.95 Urban neighborhood areas 0.70 Residential , Single-family 0.50 Multi -family 0*75 Residential (rural) OAO Y Apartment dwelling areas 0.70 Industrial and Commercial Light areas 0.80+ Heavy areas 0.90 Parks, cemeteries Oslo Playgrounds 0.20 Railroad yard areas 0.20 ;3 ;F Unimproved areas 0.10 Streets ~ { Asphalt P 0.95 Concrete o.95 Brick 0.85 Drives and walks 0.85 Roofs 0.95 Fields: Sandy soil Flat 2%. 0.05 Average 2-7% 0.10 Steep 7% 0.15 4. Fields: Clay soil Flat 2% 0.13 ' Average 2-7% 0.18 Steep 7% 0.25 Adapted from ASCE (1972 Ste- 24 &.: G A N A D A Ii60UN 0ARYI 1... _. nj GOH �•�i DKOOT CN I ,'j SIN BCNEwA SHE ONE IATAII I Ii Fj C2 PEACE 1 LEWIS CIEAAWa7EA �r' l H IOANO STATE Jr I DAHo AREA CLASSIFICATION MAP 01 — District Number F --Zone Designation me v �� O LE1JH1 '•\ Z 1 ADAM S O , n VALLEY EC SIII TON o _ CUSTEA •L,—. J CIAAK rPAY(T .&FD T G ji FA Eli ONT Si BOISE ,•-nCANYON 'BUTTE JEFF(N SON• NAOISOH ITETOp Lam BIAIADA � CL ON NCVIILCI , BIRO c I I .-.- a GOODIhG I IIHCOLN y J� J� I / t � f Z-•—• � ( CARIBOU , J '` Z JEAOu( TuIHIM11 OwYnE[ �L I �'1 POwEA 05 TWIN FALL5 I �•w� r : \ '1 I ONEID� BEAA LAXE I AX%UH _- .... 1. � N E A (� 2 0.0 16.0 r 10,0 r 13.0 680 I,0 0.8 Ad OA Li �- Q.z A� Calderwood Drive � �,,, IJ `Test Pit 2 �- o a Test Pit 1 , o O O.O l�J� •' O� `)GOO o .r rua G oom ilOJ Od O(n D \... ego o Test Pa# 5 ` Test Pit 4 oPFF �aldelv�000l Coi�m�nity ����i; l�iS 1446WesiLemhiStreet M2rlQtail, Id�hO 7. BOISE,IDAHO 53709 �rawi611Q N®. �30�7�'•geo Testing & i203i3764746 F9i208i322415 Date; 2 September 2003 ri aInspection - F: ".��f'`• Madifie� by. JAM E•MAIL••mfi i•id.com Test Pit Plate 2 Not to Scale Test Pit Locations. 0 Environmental Services ® Geotechnical Construction Materials iestin September 5, 2003 Page # 21 of 28 ® Special \\mt,server2\reports12003 reports\600 7991630774g1b307746eotech.doc Test Pit Log #: 1 Date Advanced: �/26/03 Excavated By: Circle H Construction Depth to Water Table: Mot Encountered i Logged By: ,�ennifer Miller Location: See Later Site Map Plates Depth to Bottom Of Hole: 7.0 Feet Depth Field Descrxption� w[USCS Soil a.a 9•1 ®i a / I Sediment a• I Sandy Silt Root Zone (AMwROOT 1 1ZONE): D/ • •brown,/ soft, • 'a 4r • .I: Silty Sand (SAI)o Light 1 ,d• dense, with medIUM to cowAsegrazned sand. Cemented Silty Gravel (GM)# 1 'Light Mdoivn,dry, veiy dense, with • Poorly Graded Gravel (GP)o Red. brown,slightly• dense, to niedained sand, Copyright ©2003 Materials Testing &Inspection, Inc. -- 7446 W. Lemhi St., Boise, ID 83709 208 376-4748 Fax 208 322-6515 E vIail mti@III ti-id,com www.mti id.com fl' �� r �� A3' � �'_T��s, ® Environmental Services ❑ Geotechnical En. Construction (\Aaterials lesiin ,�..� September 5, 2003 Page # 22 of 28 ® Special \\mtiserver2\reports\2003 reports\600-799\b30774g\b30774geotech.doc t � ; �. ,�` a = �' ',1 - Test Pit Log #: 2 Date Advanced: S/26/03 Excavated By: Circle H Construction •••-• Location: See Later Site 112ap Plates Depth to Water Table: Seep @ 8.3 Feet Depth to Bottom Of Hole: 17.® Feet Depth Field Description, vv//1JJSCS Soil Sample Sample Depth Qp Lab Test (Feet) and Sedianent Classification Type (Frorn-To) 1D Sandy Silt 1Zoot Zone (l�L-R®®T 0.0-1.0 Z®�); Danz brown to brown, day, soft, with excessive organics throughout. Lean Clay (CL): Dark brown to A 1.0-4.0 brown, day to slightly »zoist, hard. GS GS 1.0-2.0 2.0-4.0 4.5+ 4.0 B Cer>�ented Clayey Gravel (CC): 4.0-9.3 Red -brown, slightly moist to saturated, very dense, with medium to coarse grained sand and 6-inch minus cobbles. Clayey Sand (SC): Light red -brown 9.3-17.0 to red-broia�n, moist to saturated, der2se, with coarse grained sand. and 4-inch minus cobbles. ., � © ® - �� ' , '� ' ' .� 4 4 — I: �--- Copyright ©2003 Materials Testing &Inspection, Inc. � � - - 7446 W. Lemhi St., Boise, ID 83709 208 376-4748 Fax 208 322-6b15 E-Mail mti@mti-id.com www.mti-id.com T3 t !!n rl ; NS a - nC 1 I M September 5, 2003 Page # 23 of 28 El Environmental Services ® Geotechnical Engineering ® Construction Materials Testing ® Special Inspections \\mt1serve1.2lrep0rts\2003 repo, ts\600-799\b30774g\b30774geotech.doc gG�� I VE+ STIGATION TEST PIT LOG Test Pit Log #: 3 Date Advanced: 8/26/03 Logged By: Jennifer Miller Excavated By: Circle 1=I Construction Depth to Water Table: Seep @ 7.9 Feet Location: See Later Site 1VIap Plates Depth to Bottom Of Hole: 9.1 Feet Depth (Feet) Field Description, w/USCS Soil and Sediment Classification 0.0-1.1 Sandy Silt Root Zone (ML-ROO7 ZONE)* Dark brown to brown, day soft, with excessive organics throughout. l.1-4.6 Lean -Clay (CL):-Bi=otivn, diy, hart 4.6-9.1 Clayey Gravel (GC): Brown, slightly moist to saturated, very dense to dense, with coarse grained sand and 12-inch minus cobbles. --Cemented to 6.8 feet Copyright ©2003 AQaterials Testing &Inspection, Inc. -- 7446 W. Lemhi St., Boise, ID 83709 208 376-4748 Fax 208 322-6515 E Mail mti@mti id9com www.mti id.com u u = MATEROALS . s 0 N PECTOON September 5, 2003 Page # 24 of 28 D Environmental Services ❑ Geotechnical Engineering ® Construction Materials Testing ❑ Special Inspections 1\m6server2\reports\2003 reporgeotech.doc INVESTIGATION TEST PIT LOG Test Pit Log #: 4 Date Advanced: 8/26/03 Logged By: Jennifer biller Excavated By: Circle PI Construction Depth to ��ater Table: 1Vot Encountered Location: See Later Site IkRap Plates Depth to Bottom Of Hole: 6.5 Feet Field Description, w/JISUS Soil •' ®' 5 and Sediment Classification (Fromm , Clayey Silt Root 1 OO Dark brown to b7Aown, dr)� soft,ZONE)* with excesswe 07Aganics throughout. Cemented Silty Sand (Sne Light '/ own to white, / dense, w it/i coarse grained sand. I ~�Moderately to strongly'/ Poorly .i.•• J R'/ •brown,dq to slightly 7noist,dense / veyy dense withfine to nzediuni l grained / / '/ in upper Copyright ©2003 Materials Testing &Inspection, Inc. i � !— 74461N. Lemhi St., Boise, ID 83709 208 376=4748 Fax 208 322-6515 E-Mail mti@mti id0com www.mti id.com September 5, 2003 Page # 25 of 28 �. Use ® Environmental Services ® Geotechnical Engineering ® Construction Materials Testing ® Special Inspections \\mtiservereports\2003 repo rts\600-799\b30774g\b30774geotech.doc INVESTIGATION TEST PIT LOG Test Pit Log #: 5 Date Advanced: 8/26/03 Logged By: Jennifer Miller Excavated By: Circle �I Construction Depth to Water Table: 1lTot Lncorantered Location: See Later Site lYFap Plates Depth to Bottom Of Hole: 8.1 Feet Deptlx Meld Description, vv/USCS Soil Sample Sample Depth �p Lab Test (Feet) and Sediment Classification Type (From -To). 1D Clayey Silt Root Zone (M1zeROOT 0.04.0 ZONE): Dark brown to brown, dry, soft, with excessive organics throughout. 1.0-2.5 Fat Clay (CAI): Br=own, dry to slightly moist, hard. GS 1.0-2.5 4.5+ D Z,654.7 Sandy Silt (ML): Light brown, dry to slightly moist, very stiff. 437 5.9 Silty Sand (SM): Red -brown, slightly moist, dense, with fine sand. 5.9-8.1 Poorly Graded Gravel (GP): Red- br-own, dry to slightly moist, very dense with 124nch minus cobbles. --Cemented to 6.6 feet Copyright ©2003 AIaterials Testing &Inspection, Inc. - - 7446 W. Lemhi St, Boise, ID 83709 208 376-4748 F"ax 208 322-6515 E-Mail mti@mti-id.com www.mti-id.com ,I ,.I �v Le IMARM Uri *y'tiM Ate\ n4\Mpw t:iw�w�wiw�r �Myr..•' yyyR*Ay r�r . y�yA!►w�y, �\. t:.1= ,-�+wm� �R* ay\,R\y�!' ��!Myy�11�4r. �iia���:?%;�r•� Iri�l�'itwra 1. Deaign Load, AASHTD HS-25 Highway Loading. 2. ail Reinforcing Steel Shall be Grvde 6D. 3. Detailed Drawing of a Preceat Box or a Poured in Place Box Design Must Be Approved By The 0is1trict Engineer Prior to Construction. 4. Tank Capacity Is Determined by Plater Volume Calculations and Flow Rate, Height, Length .and Width of Tank Determined by Capacity Needed. 5. Height of Outlet Baffle W011 and Length of Inlet Baffle Well Determined by Tank Capacity and Flow Rate. 6. Before Theae Boxes are Used The Application Must Be Approved by the District. 7. Manhole frame, Collar and Cover Shall Be ner SD-816 and SD-617. SAND AND GRLt�SE f `� IDANO ST�IVDARDS FOR I PUBLIC WORKS C(?NS7�UCYfI0h1 (�aC�ib Supplement) REVISIONS: New Drawing by ACHD 11-3D-00 d 03 04:23p �� z D I � �� : . � _� � Z !T1 --t L. I� '� T-- u �--- �.\--- I J-i I \ ` / I ' \ � �� / � �� \ � �� I IC �=� � v a I I �t\ /�i l'l I I � / 1 � � \�% !� I / 1 /\ I `�� � � / 1 i��� � � I � L- r--\1_� �' L� !I � I L� I I I m j Received �� uDi�lZ N ��f< � o �'� 0 v 0 c x rn r m I a N v a N D Q v.%. Z N—rm..• m � � N n n ' 22 z N m p rcn o z C N a� ©� rt� �I c I = j . 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