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Home My WebLink About2001-12-07 BRRA Email & Drainage CalculationsKris Danielson From: Sent: To: Cc: Subject: Pastier, Dennis M [dpostler@bonestroo.com] Friday, December 07, 2001 10:54 AM Kris Danielson (E-mail) Scott Richards (E-mail); Kimberly Kamper (E-mail); Jay Johnson (E- mail) ; Jim Butler (E-mail); Judy Hoist (E-mail); Mark Vierling (E-mail) Montanari Office Building The drainage calculations prepared by RFC Engineering, Inc. for Montanari's Office Building are acceptable as submitted. Their calculations show that under any sized storm event, the rate and volume of water leaving the site after their development is basically the same as before their development (due to the impervious surface area actually decreasing approximately 4300 sq ft.). The flow will be more concentrated to the frontage road ditch via a curb cut they are proposing in the driveway. This would be better served by a catch basin and flared end section outlet with adequate rip rap. Dennis M. Pastier 1 DEC MON 10:41 AM FROM FAX:24105 PAGE 1 Date: December 3, 2001 TO: C C: Call me. Thomas Name: FAX No: 651-275-0678 Company: Montanari Homes, Inc. Address: 13481 North 60th Street Mark Gossman RFC Oak Park Heights, Minnesota 55082 Phone: 651-275-0690 FROM: Name: Thomas Halley Project: Iviantanari Homes Office Number of Pages Including This Page: Instructions or messages to recipient: Mark Attached are the drainage calculations for the site, Engineering, Inc. Consulting Engineers 13635 Johnson Street Ham Lake, MN 55304 763-862-8000 * Fax 763-862-8042 e RFCangrgiattglobalinet I DEC - 5 200! SEC - 03 - 2001 MON 10.41 AM FROM Data for MO TTA TARI HOMZs oFFIC$ S ILDING OAK PARK HEIGHTS Pace 1 TYPE II 24-HOUR IN `ALL . 2.50 IN Prepared by RFC ENcINTERING, INC. 3 Dec 01 Hyde CAL, 1.1 . 001515 T 1i�d M .��'000 t� ' WAT2P S ROUTING = °&= = =MOIM-- MMUIMMMINrMMaIMWOOQ 3UBCRYCHMENT REACH LI POND S t3 OAT C H1ENT 1 ' EXISTING C OND I W I ONS sU3cATOMENT 2 = PROPOSED CONDITIONS FAX;24105' PAGE 2 LINK DEC MON 1041 AM FROM Data for MONTANARI HOMES MICE BUILDING OAK PARK RIGHTS TYPE II 24-HOUR RAINFALTAm 2,50 IN Prepared by RFC ENGINEERING, INC. Eyjscl (p) 1986-1999 ApplEzzzap,..ult_y______r S stems SUBCATCHMENU! 1 EXISTING CONDITIONS PEAK= 2.46 CFS 11.87 HRS, VOLUME= .11 AF ELM C 31156,00 98 IMPERVIOUS oethod TR-55 SHEET FLOW 1-1 Smooth surfaces n=.011 P2=2.7 in s=.025 '/' SHALLOW CONCENTRATED/UPLAND FLOW 1-2 Paved Kv-20.282 L22O =.025 V=3.21 fps PEAK= 2.44 CFS 26824.00 98 IMPERVIOUS 4332.00 8$ GRASS-ASSUMED D-POOR 31156.00 97 Method, Comment SUBCATCHMENT 2 PROPOSED CONDITIONS FAX:24105F Total Length= 320 ft 11.87 HRS, VOLUME= .11 A Comment TR-55 SEEET FLOW 2-1 Smooth surfaces n..011 L=100' P2=2.7 in a..015 '/ SHALLOW CONCENTRATED/uPLA4D FLOW 2-2 Paved Kv=20.3282 L=220' m=.015 'if V=2.49 fpm Total Length. 320 ft SCS T7-20 METHOD TYPE II 24-HOUR AINFALL= 2.50 IN spAN= 10-20 HRS, dt=.1 HRS PAGE 3 Page 2 3 Dec 01 .11.114.1111.ROM.111.0.711M1111 Tc (in), 1.2 1 . 1 Total Tc mg 2.3 SCS TR METHOD TYPE 11 24-HOUR RAINFALL= 2.50 IN SPAN. 10-20 HRS, dt=.1 IR 1.5 1.5 .1 ..... Total T® 3.0 SEC - 03 - 2001 MON 10;41 AM FROM Data for MO TANARI HO MSS OFFICE BUILDING OAK TYPE =I 24 - HOt7R. RAINFALL. 3.70 IN Vreparad by RFC ENGINEERING, INC. H crc= 5.11 001515 WATERSHED ROUTING MMMMWM -.. ,wUSIMMMMIB; 0 f RepcH SUB: CATCHMENT 1 0 EXISTING CONDITIONS SUBCATCI BNT 2 PROPOSED CONDITIONS A P0,0 FAX PARK HEIGHTS Mi.crocc uter S stems M MIEMMEMMMISMOO®® LINK PAGE 4 Page 1 3 Dec 01 DEC - 03 - 2001 MON 10.41 AM FROM Data for MONTANARI HOMES OFFICE BUILDING OAK PARK HEIGHTS TYPE II 24 -HOUR RAIN 'ALL= 3.70 IN Prepared by RFC ENGINEERING, INC. H droCAD 5.11 00151 A•. lied Microcom +uter S SD CATCINT 1 PEAK. 3.67 CFS @ 11,87 HRS, VOLE.. 417 AF 31156,00 98 IMPERVIOUS M hod EXISTING CONDITIONS Comment TR -55 SHEET FLOW 1 -1 Smooth surfaces n. E 011 L-100' P2 m2 . 7 in s=.025 SHALLOW CONCENTRATED/ UPLAND FLOW 1-2 Paved Kv= 20.3282 L .'220 6..025 '/' V.3.21 fps S LIB CAT CEMENT 2 PROPOSED CONDITIONS PEAK. 3,6S CLS 0 11.87 HRS, VOLUME= .17 AF ......._..:°�, . CN 26824.00 98 IMPERVTOUs 4332.00 89 CRASS- ASSUMED D -POOR 31156.00 97 Method FAX TR - 5 5 SHEET FLOW 2-1 Smooth surfaces 7,1 . 011 L 100' P2=2.7 SHALLOW CONCENTRATED/UPLAND FLOW 2-2 Paved Kv.20.3282 L.220 s..015 1 / 1 V.12.49 fps 5 .2.015 '1 PAGE 5 Page 2 3 Dec 01 SCS TR-20 MEmCD TYPE TI 24 -HOUR RAINFALL= 3.70 IN SPAN= 10-20 HRS, dt = . 1 HRS Total Length= 320 ft Total Tc. 2 4 3 6C S TR ME' 'h OD TYPE 1I 24 -HOUR RAINFALL' .70 IN SPAN= 10 - 20 HRS, dta .1 HRS Total Length= 320 ft Total Tom 3.0 SEC - 03 - 2001 MON 10.41 AM FROM SUBCATC ONT StCATCEMENT 2 Data for MONTA.WARI HOMES OFFICE BUILDING OAK PARK HEIGHTS WPM II 24-HOUR RAINFALL= 4.10 IN Prepared by RFC ENGINEERING, INC. H droCAD 5.1 r 1 85.1999 A.. 1ied Microoam -cater wATERsHEO ROUTIN G - -- SIJBCATCHMENT Li REACH A POND FAX:2g105f L I N K FxISTING CONDITIONS --> PROPOSED CONDITIONS -> PAGE 6 Page 1 3 DeC 01 DEC MON 10:41 AM FROV Data for MoNTANARI HOMES OFFICE BuILDING OAK PAR HEIGHTS TYPE 11 24 RAINFALLm 4.10 IN Prepared by RFC ENCINIIERING, INC. r A D 5 00151S 86-1999 A lied MI outer S :stems susCATCHMENT 1 DEM. 4,08 CFS 11.87 HRS , VOLUME= .19 AY 31156.00 98 IMPERVIOUS Method EXISTING CONDITIONS TR-55 SHEET FLOW 1-1 Smooth murfaces O11 L.100' 1 in SHALLOW CONCENTRATED/VPLAND FLOW 1-2 Paved Kv=20.3282 L.220' s=.025 '/, V.3.21 fps SUBCATCHMSNT 2 PROPOSED CONDITIONS PEAK= 4.10 CFS @ 11.a7 IRS , VOLUMS .18 AF 26824.00 98 IMPERVIOUS __1121.112u GRASS-ASSUMED n-pooR 31156.ao 97 Ccmmen FAX:24105f 5.. ' / PAGE 7 Page 2 3 Dec 01 Scs TR-20 mETTIon TYPE II 24-ROUR RAINFALL= 4.10 IN SPAN= 10-20 FRS, dt..1 HRS To min 1.2 1.1 W M AM Total Length= 320 ft Total Tc. 2.3 $CS TR-20 METHOD TYPE II 24-HOUR RAINFALL. 4.10 IN SPAN= 10-20 HRS, dt..1 kajazi_ Tc1MLUL TR-55 SHEET FLOW 2-1 1.5 Smooth aurtaces n..011 L=I00' P2=2.7 th 015 '/' SHALLOW CONCENTRATED/um:1Am mow 2-2 1.5 Paved Kv=20.3282 L=220' s=.015 '/' V.2.49 fps Total Length= 320 ft Total Tc. 3.0 DEC - 03 - 2001 MON 10.42 AM FROM FAX;24105 PAGE 8 Data for MCNTANARZ DOMES OFFICE BUILDING OAR PARK HEIGHTS Page 1 TYPE 1I 24 -HOUR RAINFALL= 5.85 IN Prepared by RFC ENGINEERING, INC. 3 Dec 01 Hydro AD SL 001515 c 1986 -1999 A• .::' - • u r. *uter S stems WATERSHED ROUTING = = =mnmm..maQQ SUBCATCHN$NT . KII1: LJCTCHMNT � REACH (1) SUECATCENT 2 = PROPOSED CONDITIONS /\ PONO LINK m EXISTING CONDITIONS -> DEC MON 10:42 AM FROM e Data for MONTANARI HOMES OFFICE BUILDING OAK PARK HEIGHTS Pag 2 TYPE II 24-HOUR RAINFALL= 5.85 IN Prepared by RFC ENG1NNERING, INC. H CAD 5.11 0._ 15 c 19 • • A•iilied v rocomoute terns SUBCATCHMENT 1 pEAK= 5,84 CFS @ 11.67 HRS, VOLUDO .27 AP 31156.00 98 IMPERVIOUS Method Comm TR-55 SHEET FLOW 1-1 Smooth murfacea n0.011 L=100 P2=2.7 in SHALLOW coNCENTRATED/UPLAND FLOW 1-2 Paved Xv=20.282 L=220' sim,025 1 / 1 V=3.21 fps SUBCATCHMIENT 2 PROPOSED CONDITIONS PEAK= 5.89 CFS ID 11.87 HRS, VOLUME= .27 AF 26824,00 98 ImPERVIOUS 4332.00 e_a_ GRASS-ASSUMED D-POOR 97 31156.00 Metho TR-55 SHEET FLOW $mooth surfaces m,---.011 L.100' SALLOW CONCENTRATED/uPLAgD PLOW VXISTING CONDITIONS FAX:24105r s.02! '/' PAGE 9 3 Dec 01 sCS TR-20 memoD TYPE TI 24-Hon RAINFALL= 5.85 IN SPAN= 10-20 HRS, dtme.1 HRS 1.2 1.1 Total Length. 320 ft Total Tc= 2.3 SCs TR-2D METHOD TYPE 11 24-HOUR RAINFALL= 5.85 IN SPAN= 10-20 HRS, dt=.1 HRS 1. , Comment 2-1 122=2,7 in s..025 I/ 2-2 Paved 1(w-20,3282 Lm220 s..015 '/' Vm2.49 fps Tc i.s 1.5 Total Length= 320 ft Total Tc. 3.0