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Home My WebLink AboutINFRASTRUCTURE PLANS 2.23.22 -21-00804 - Legacy Rental Management and DirectCom - Parking Lot - 142 W 1st N-Reviewed-ApprovedAuthor Name Author Email Author Phone No.: Stan Crittenden Stan.Crittenden@rexburg.org 208-372-2314 Tawnya Grover Tawnya.Grover@rexburg.org 208-372-2167 Kyle Baldwin Kyle.Baldwin@rexburg.org 208-372-2164 Joel Gray Joel.Gray@rexburg.org 208-372-2331 Description : Legacy Rental Management and DirectCom - Parking Lot Address : 142 W 1st N Record Type : Commercial Accessory Structure Document Filename : INFRASTRUCTURE PLANS 2.23.22 -21-00804 - Legacy Rental Management and DirectCom - Parking Lot - 142 W 1st N.pdf Comment Author Contact Information: Corrections in the following table need to be applied before a permit can be issued Review Report Approved # 21-00804 Page Reference Annotation Type Author : Department Status Page Review Comments Applicant Response Comments PG1 of 3 Stamp Stan Crittenden : Fire Open 1 Approved - Fire Dept PG1 of 3 Stamp Tawnya Grover : P&Z Open 1 Plan Received PG2 of 3 Stamp Kyle Baldwin : P&Z Open 2 Approved - Planning and Zoning PG2 of 3 Callout Joel Gray : PW Open 2 foot? PG2 of 3 Callout Joel Gray : PW Open 2 Enclosure will need to be constructed to meet City Standards and moved East to end of parking stall. PG2 of 3 Stamp Joel Gray : PW Open 2 Approved - Public Works Commercial Accessory Structure Approval of plans does not constitute approval of variance from code Powered by TCPDF (www.tcpdf.org) N8 9 ° 4 3 ' 2 9 " E 9 9 . 0 0 ' S0°14'37"E 329.99' N0°14'37"W 329.99' X X X FO FO F O E G 4866.696 4867.344 4868.721 4867.924 4867.541 4867.647 4867.0120 4867.505 4866.669 4867.100 4867.234 4868.117 4868.966 4866.696 4868.721 4867.373 4865.541 4866.998 4866.809 4866.622 4866.929 4866.765 4866.740 4867.071 4867.070 4866.828 4867.054 4866.989 4866.928 4866.939 4866.941 4866.958 4866.770 4867.316 4867.592 4866.372 4866.973 4865.777 4866.342 4866.763 4866.720 4866.721 4866.669 4866.687 4866.673 4866.638 4866.735 4866.698 4866.734 4866.694 4866.893 4867.138 4866.997 4866.854 4866.833 4866.659 4866.674 4866.556 4866.649 4866.655 4866.725 4866.734 4868.120 4867.437 4866.662 4866.817 4866.963 4866.922 4866.919 4866.770 4866.610 4866.616 4866.605 4866.731 4867.202 4866.998 4866.828 4866.469 4866.721 4866.848 4866.449 4867.440 4866.556 4866.569 4867.194 4867.462 4867.102 4867.339 4867.479 4867.236 4867.206 4866.7930 4867.2660 4867.310 4867.121 4867.211 4866.854 4867.486 4867.149 4867.306 4867.348 4867.582 4867.166 4867.693 4867.327 4867.1040 4867.129 4866.928 4867.011 4867.469 4866.660 4867.430 4866.306 4867.241 4866.236 4867.210 4867.168 4867.029 4867.148 4867.266 4867.118 4867.5894867.264 4866.880 4866.791 4866.842 4866.990 4866.755 0 02/02/2022 PREPARED SHEET 142 W 1ST N, REXBURG, ID SURVEY POINTS 0 30157.5 P R O F E S S I O N AL ENGI N E E R R E G I ST ERE D 11519 G E R ALD R . W I L L I A M SS T ATE O F I D A H O02/02/2022 SHADING AND TEXTURE LEGEND PROPOSEDEXISTINGFACILITY OR SURFACE TREATMENT DETAILSSCALEPLANPROFILESECTIONS VERTICAL HORIZONTAL REVISION REVISION 3 1 DESCRIPTION DATE LEGACY RENTAL MANAGEMENT PA T H : P : \ P R O J E C T S \ I D - D V - L e g a c y R e n t a l M g m t \ D r a w i n g \ L e g a c y R e n t a l . d w g D A T E : F e b 0 2 , 2 0 2 2 - 1 : 3 8 p m P l o t t e d b y C P U - 1 REVISION 2 BUILDING ASPHALT PAVEMENT CONCRETE LANDSCAPING N 8 9 ° 4 3 ' 2 9 " E 9 9 . 0 0 ' S0°14'37"E 329.99' N0°14'37"W 329.99' S 8 9 ° 4 3 ' 2 3 " W 9 9 . 0 0 ' X X X 48 6 7 48 6 7 486 7 4 8 6 7 4 8 6 8 FO FO F O 4 . 9 0 % 2.21% 4. 6 9 % 3 . 7 6 % 3. 2 4 % 3 . 3 0 % 1. 1 5 % 1 . 7 4 % 2. 1 6 % 1 . 8 4 % 1. 8 6 % 1. 4 9 % ROLL-OUT TRASH RECEPTACLE DUMPSTER LOCATION GAS METER ELECTRIC METER CB CB CB E G POWER POLE SEWER MH (PAVED OVER) 4" S S SUBBASIN #2 SUBBASIN #3 SUBBASIN #1 (26) 9'W X 20'L PARKING SPACES PROVIDED OU T F A L L 48 6 7 48 6 7 486 7 4 8 6 7 4 8 6 8 NEW DRAIN 4"∅ PERFORATED OLD CASTLE MH190 BARREL, 4' DEEP, OPEN BOTTOM ON 1" DRAIN ROCK, PERFORATIONS ARE 1"∅ ON 1' X 1' GRID. ENTIRE ROOF DRAINS TO THE NW & SW CORNERS OF THE BUILDING AND FROM THERE TO THE HISTORIC DRAIN. HISTORIC DRAIN 1' X 2" GRATE OVER 6' DEEP CONCRETE BARREL, ASSUMED TO BE AN OLD CASTLE MH190 SECTION WITH 1"∅ PERFORATION ON A 1' X 1' GRID WITH OPEN BOTTOM. P R O F E S S I O N AL ENGI N E E R R E G I STERE D 11519 G E R ALD R . W I L L I A M SS T ATE O F I D A H O02/02/2022 0 30157.5 BUILDING SHADING AND TEXTURE LEGEND PROPOSED ASPHALT PAVEMENT EXISTINGFACILITY OR SURFACE TREATMENT CONCRETE LANDSCAPING DRAINAGE NOTES HISTORIC DRAINAGE PATTERN MICHAELSON HAD LUMBER SHEDS APPROXIMATELY WHERE THE PARKING STALLS ARE NOW, ALL OF WHICH DRAINED OFFSITE TO THE WEST. THE BALANCE OF SUBBASINS #1 AND #2 SHOWN HEREON DRAINED TO THE STREET. ONLY SUBBASIN #3 RUNOFF HISTORICALLY REMAINED ONSITE, WHICH ALL DRAINED TO A 1’ X 2’ GRATE NORTH OF THE NORTHEAST CORNER OF THE BUILDING. MEASURING DOWN, THAT DISPERSION PIT IS 6’ DEEP, PRESUMABLY A ROUND PERFORATED MANHOLE BARREL WITH NO BOTTOM PER OLD CASTLE MH190, WITH SOME PERCOLATION OUT THE PERFORATIONS AND MOSTLY DOWN INTO THE UNDERLYING GRAVELS AT THE BOTTOM OF THE BARREL. THIS INLET AND DISPERSION PIT IS OF UNKNOWN CAPACITY, BUT THE ASSUMPTION IS THAT IT HAS BEEN SUFFICIENT TO PREVENT RUNOFF GETTING INTO THE BUILDING OR IT WOULD HAVE BEEN FIXED AS A PREVENTATIVE MEASURE. PROPOSED DRAINAGE PATTERN SUBBASIN #3 REMAINS UNCHANGED. WHEREAS RUNOFF FROM SUBBASINS #1 AND #2 USED TO ALL DRAIN OFFSITE, NOW ONLY THAT WHICH IS MORE THAN THE CATCH BASIN DIVERSION PITS AND ONSITE STORAGE WOULD RUN OFFSITE. THE TWO DISPERSION PITS CONSIST OF 4’ DEEP 4’ DIAMETER OLD CASTLE MH190 CONCRETE MANHOLE BARRELS WITH 1” DIAMETER PERFORATIONS ON A 1’ X 1’ GRID IN THE SIDEWALLS AND HAVE A BOTTOM OPEN TO 1” DRAIN ROCK. THE VOLUME IS KNOWN AT 50 CUBIC FEET, BUT THE DISPERSION RATE IS UNKNOWN. BASED ON AS-BUILT SURVEY GRADES, THE ONSITE DRAINAGE SYSTEM WOULD FUNCTION AS FOLLOWS. FIRST, EACH SUBBASIN DISPERSION PIT WOULD FILL UP, AND THEN SURFACE STORAGE UNTIL OVERFLOW. SUBBASIN #2 WOULD OVERFLOW TO SUBBASIN #3, AND EVENTUALLY SUBBASINS #2 AND #3 WOULD OVERFLOW TO SUBBASIN #1, AND THEN ALL 3 WOULD EVENTUALLY OVERFLOW FROM SUBBASIN #1 TO THE SOUTHWEST CORNER OF THE SITE OVER THE SIDEWALK AND TO THE STREET. QUALITATIVE ANALYSIS SUBBASIN #3 IS 21,213 SF DRAINING TO A 6’ DEEP CATCH BASIN WITH POSSIBLY THE SAME BOTTOM DISPERSION AREA AS THE DISPERSION PITS IN SUBBASINS #1 AND #2. BUT IN ADDITION TO THE SUBBASIN #3 PIT BEING 50% DEEPER, IF WE ASSUME IT HAS 50% MORE DISPERSION CAPACITY, THEN BY COMPARISON THE NEW DISPERSION PITS SHOULD BE ABLE TO HANDLE RUNOFF FROM AN AREA 67% OF THE SIZE OF SUBBASIN #3. HOWEVER, SUBBASINS #1 AND #2 ARE 26.8% AND 27.5%, RESPECTIVELY, THE SIZE OF SUBBASIN #3. BASED ON THIS QUALITATIVE ANALYSIS, THE NEW DISPERSION PITS SHOULD BE OKAY. A SECOND QUALITATIVE CONSIDERATION IS THAT WHATEVER THE NEW DISPERSION PITS AND SUBBASIN STORAGE VOLUMES CAN HANDLE BEFORE OVERFLOW OFFSITE, IT IS THAT MUCH LESS THAN HISTORICALLY FLOWED OFFSITE. QUANTITATIVE ANALYSIS DESIGN FOR NON-GRANDFATHERED SITES WOULD NEED TO CONTAIN 0.9” OF RAINFALL ONSITE AND NOT ADVERSELY AFFECT OTHERS IN A 1.3” RAINFALL EVENT. THE DRAINAGE CALULATIONS TABLE DOCUMENTS REQUIRED AND PROVIDED STORAGE VOLUMES WHICH ARE CONSERVATIVELY BASED ON NO DISPERSION DURING THE 1-HOUR RAINFALL EVENT. THE TABLE SHOWS THAT THERE IS 1101 CF STORAGE VOLUME ONSITE BEFORE THERE IS ANY RUNOFF TO THE OFFSITE WHICH IS TO THE STREET. THE PROVIDED VOLUME IS 73% OF THE 25-YR RUNOFF. WITH DURING-EVENT DISPERSION THERE MAY BE NO RUNOFF BUT IF THERE IS, IT WILL BE AT LEAST 73% LESS THAN UNDER HISTORIC CONDITIONS. DETAILS SCALEFEATUREPLAN SCALE PROFILE SCALE SECTION SCALE VERTICAL HORIZONTAL REVISION REVISION REVISION 3 2 1 DESCRIPTION DATE PA T H : P : \ P R O J E C T S \ I D - D V - L e g a c y R e n t a l M g m t \ D r a w i n g \ L e g a c y R e n t a l . d w g D A T E : F e b 0 2 , 2 0 2 2 - 1 : 3 9 p m P l o t t e d b y C P U - 1 EXHIBIT 1 02/02/2022 DATE LEGACY RENTAL MANAGEMENT 142 W 1ST N, REXBURG, ID GRADING AND DRAINAGE PLAN DATUM CRS EPSG: { foot? Enclosure will need to be constructed to meet City Standards and moved East to end of parking stall.