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Home My WebLink AboutO&M Manual 10505 N. College Ave | Indianapolis, IN 46280 | .www.weihe.net | (317) 846-6611 | (800) 452-6408 | Fax: (317) 843-0546 Allan H. Weihe, P.E., L.S. - Founder OPERATIONS AND MAINTENANCE MANUAL for BEDFORD FALLS OF CARMEL 146th Street Carmel, Hamilton County Indiana Project #W20-0515 Prepared for: Less Impact Development 8910 Purdue Road, Suite 425 Indianapolis, IN 46268 Telephone (317) 816-1230 Contact: Scott Schutz E-mail: scott@equiteamllc.com Prepared By: Travis P. Gaither, P.E. Checked By: Duane A. Sharrer, P.E. Date: February 16, 2022 Revised: March 30, 2022 July 20, 2022 August 29, 2022 I AFFIRM, UNDER THE PENALTIES FOR PERJURY, THAT I HAVE TAKEN REASONABLE CARE TO REDACT EACH SOCIAL SECURITY NUMBER IN THIS DOCUMENT, UNLESS REQUIRED BY LAW. – Travis P. Gaither THIS INSTRUMENT PREPARED BY: Travis P. Gaither Operation and Maintenance Manual Prepared For: Bedford Falls of Carmel Carmel, Indiana Project #W20-0515 TABLE OF CONTENTS Operation and Maintenance Manual 1. Project Narrative 2. Definitions 3. Owner Acknowledgement 4. Location Maps 5. Checklists and Maintenance Activities  Stormwater Quality Mechanical Unit  Stormwater Infrastructure  Wet Detention Basin with Native Banks Operation and Maintenance Manual Prepared For: Bedford Falls of Carmel Carmel, Indiana Project #W20-0515 Project Narrative Less Impact Development is proposing to develop a 34 lot residential subdivision to be known as “Bedford Falls of Carmel” on a 16.87 acre tract of undeveloped land. Said development is located on the south side of 146th Street between Spring Mill Road and Ditch Road. Refer to Figure 1.1. The proposed development is on a site at a Latitude of N 39° 59' 54" and Longitude W 86° 10' 28", falling within Clay Township. The site is generally located in the Northwest Quarter of Section 22, Township 18 North, and Range 3 East, in Hamilton County, Indiana. The stormwater runoff will be routed to one (1) offline stormwater quality mechanical unit (Contech CS-8) and (1) Wet Detention Basin with Native Banks to meet the Water Quality Requirements described in Chapter 700 of the Stormwater Manual. This O&M manual is for the inspection and maintenance of the stormwater quality mechanical unit, wet detention basin, and stormwater infrastructure associated with Bedford Falls of Carmel. Refer to Figure 2. Site Information Deed of Record: Refer to Recorded Plat for Bedford Falls of Carmel Owner: Less Impact Development 8910 Purdue Road, Suite 425 Indianapolis, IN 46268 BMP Owner Contact Information: Bedford Falls of Carmel Homeowners Association 8910 Purdue Road, Suite 425 Indianapolis, IN 46268 Telephone (317) 816-1230 Contact: Scott Schutz Email: scott@equiteamllc.com Definitions BMP: Best Management Practices refer to structural or non-structural measures designed for the benefit of water quality and quantity. BMP Owner: The owner of the BMPs is typically the Homeowner Association. The BMP owner may also be the lessee of the property in the case of long-term leases of commercial and industrial zoned properties. The lessee is considered the BMP owner only if the lease specifically states that construction by the lessee must meet applicable local codes and regulations. Stormwater Quality Mechanical Unit: The mechanical stormwater quality unit provides a highly effective means for the removal of sediment, floating debris and free-oil. Swirl technology, or vortex separation, is a proven form of treatment utilized in the stormwater industry to accelerate gravitational separation. The BMP/WQU provides treatment for the most contaminated first flush, while the cleaner peak storm flow is diverted and channeled through the main conveyance pipe. A combination of gravitational and hydrodynamic drag forces encourages the solids to drop out of the flow and migrate to the center of the chamber where velocities are the lowest. Wet Detention Basin with Native Banks: A Wet Detention Basin is a facility, which removes sediment, biochemical oxygen demand (BOD), organic nutrients, and trace metals from stormwater runoff. This is accomplished by slowing down stormwater using an in-line permanent pool or pond affection settling pollutants. The wet pond is similar to a dry pond, except that a permanent volume of water is incorporated into the design. The drainage area should be such that as adequate base flow is maintained in the pond. Biological processes occurring in the permanent pond pool aid in reducing the amount of soluble nutrients present in the water such as nitrate and ortho- phosphorus. A portion of the Wet Detention Basin is covered by Native Banks. The vegetation within the Native Banks is an aquatic shoreline seed mix of plants native to the area. This portion of the bank is not to be mowed. Best Management Practice (BMP) Urban stormwater runoff contains many types and forms of pollutants. When compared to stormwater run-off from pre-developed conditions, high concentrations of some contaminants that are not naturally present in surface runoff from undeveloped local lands are found. Runoff from undeveloped watersheds contains metals, nutrients, sediment particles, oxygen-demanding compounds, and other constituents. Once developed, constituent loads increase because surface runoff volumes increase and the sources of many of these pollutants also increase. Supplemental applications of compounds, such as fertilizers, also tend to increase the availability of some pollutants to stormwater runoff. Runoff water quality in urban areas can be extremely detrimental to local habitat. Paved surfaces and standing water bodies for stormwater management control elevate the temperature of water entering streams. Chemicals in standing water and ponds are oxidized, resulting in depressed levels of dissolved oxygen. Increased runoff volumes and rates create scour and deposition damage to instream habitat. Activities in urbanized areas, such as vehicular traffic, deposit pollutants such as heavy metals and oil & grease on paved surfaces where they easily wash off into the streams. Best management practices (BMPs), both structural and non-structural, can reduce the amount of pollutants in stormwater. Stormwater Infrastructure: Storm water infrastructure and structures refers to structural or non-structural measures designed for the benefit of storm water conveyance. Storm water is the rainfall/ snowmelt that flows over our yards, streets, parking lots, and buildings and either enters the storm drain system or runs directly into a lake or stream. Owners of storm water infrastructure and structures are typically the property owner. The storm water infrastructure owner may also be the lessee of the property in the case of long-term leases of commercial and industrial zoned properties. The lessee is considered the owner only if the lease specifically states that construction by the lessee must meet applicable local codes and regulations Catch basins: Catch basin/inlet cleaning and repair has traditionally been performed to respond to localized flooding problems in streets. Catch basins are inlets at the curb with a small trap (usually six inches to one foot deep) below the sewer pipe. These devices help to clean storm water because particles in street runoff settle into the trap before the water enters the storm sewers. Catch basins require regular cleaning of the sediment trap to be. The inlets do not trap sediments and don’t need cleaning unless they are plugged. Cleaning for either catch basins or inlets can be done by hand (e.g., with a clamshell or shovel) or with a vacuum truck. Conveyance Storm Pipes: A good rule of thumb is to conduct inspection of storm drain inlets, ditches, channels, ponds and other treatment facilities at least once a year, prior to the beginning of the rainy season. Complete inspections early enough so that repairs can be made during dry weather. Catch basins should be inspected at least once every six months. Some storm water treatment devices, such as oil/water separators, may require more frequent inspection. For these, check the manufacturer’s specification or other design guidance handbooks. Sewer pipes and culverts should be inspected every three to five years, or in response to a reported problem. Most agencies inspect their sewer pipes six inches or larger with a TV camera, and pipes 36 inches or larger with a walk-through inspection. All other parts of the system are inspected visually. Look for excessive silt build-up, erosion, unusual algal growth, cracked or collapsed pipes, misaligned joints, and other signs of problems such as a sheen on the water surface, discolored water, or an unpleasant odor. Check with product manufacturers or storm water handbooks for advice on what to look for when inspecting more sophisticated treatment devices such as flow splitters and diverters. When a problem is noted, take steps to correct the problem, or route this information immediately to the appropriate individual(s) in your organization who can respond. If needed, develop a good response plan to ensure quick follow-up in the future. Inspections The first inspection shall be performed immediately after construction is completed. If there are any deficiencies are found during the inspection, these should be addressed in a timely manner. Requirements regarding the submittal of annual inspection reports to the City of Carmel Engineering Department. The first report is due one year after construction is completed, with subsequent reports due each year within the same month of the initial report. If there are any deficiencies found during the inspection, these should be addressed. If the inspection report is not received within the month it is due, if there are deficiencies which were not included in the report, or if any deficiencies included in the report are not addressed in a timely manner, the BMP owner faces enforcement action from the City. Construction Completion Type of Inspection Inspection Due Date Subsequent Due Dates Date: Storm Structures 1 year after construction completion date After every rain event >1 inch over a 24 hour period Annually, within same month as initial report Date: Stormwater Quality Mechanical Unit (Contech CS-8) 1 year after construction completion date After every rain event >1 inch over a 24 hour period Annually, within same month as initial report Routine inspections are the responsibility of the BMP owner. Maintenance is also the responsibility of the owner. The BMP owner shall be financially responsible for any maintenance or repairs required by the City or its representatives during the City’s inspections. The approval maintenance plan and inspection forms provided with this manual should be used as guidance for performing maintenance activities. Completed inspection forms must be maintained by the BMP owner and produced upon request by the City. The City must be notified of any changes in BMP ownership, major repairs or BMP failure in writing within 30 days. The letter should be addressed to: City of Carmel Carmel Engineering Department Storm Water One Civic Square Carmel, IN 46032 The City and/or its representatives have the right to enter the property to inspect BMPs. In the event that the City finds a BMP in need of maintenance or repair, the City will notify the BMP owner of the necessary maintenance or repairs and give the landowner a timeframe for completing the maintenance or repairs. If the maintenance or repairs are not completed within the designated timeframe, the City shall perform the maintenance or repairs and bill the landowner for the actual costs for the work. Inspection & Maintenance Activities Refer to the checklist provided with this manual for operation, maintenance and inspection of BMP and storm water infrastructure. The checklist is for the use of the BMP owner in performing routine inspections. The developer/owner is responsible for the cost of maintenance. The BMP owner must maintain and update the BMP operations and maintenance plan. At a minimum, the operations and maintenance plan must include, but is not limited to: 1. Visual inspection and removal of debris from all storm structures including the sumped structures and Snout Guards. BMP owners must routinely inspect BMPs to verify that all BMP components are functioning as designed and are not in danger of failing. All BMPs need maintenance to function as water quality and quantity enhancements. Maintenance can range from dredging sediment out of the treatment area to mowing grass. The BMP owner agrees to the maintenance and inspection programs attached with this manual. Inspections must be documented on the inspection forms included in this Operation and Maintenance Manual. A self-monitoring program by the project site owner is required during construction and during a maintenance schedule of any project described. A trained individual employed or retained by the project site owner shall prepare and maintain a written evaluation of the project site by the end of the next business day following each measurable Inspection. Inspection during construction should be after a storm event and at a minimum, one (1) time a week. Owner Acknowledgement Agreement (“Agreement”) For good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the undersigned owner (“Owner”) hereby submits this Operation and Maintenance Manual (“Manual”) to the City of Carmel, Indiana (“City”) as a written acknowledgement of Owner’s warranty and agreement to institute, maintain, and follow the water quality Best Management Practices (“BMPs”) listed below, and to follow and abide by the inspection schedule and maintenance activities listed in this Manual. The Owner also hereby agrees to provide, at Owner’s cost, all additional maintenance, repair, and/or replacement services reasonably necessary to maintain the function and longevity of the BMPs from and including the date this Agreement is executed by Owner and including the date on which a new Agreement is filed with the City by another party who assumes all of the obligations and responsibilities of Owner as set forth herein. BMPs: Contech CS-8 (SQU), Wet Detention Basin with Native Banks, Stormwater Infrastructure __________________________________ ____________ Owner Signature Date ___________________________________________ ___________________________________________ Printed Name Company STATE OF INDIANA ) ) SS: COUNTY OF HAMILTON ) BEFORE ME, the undersigned, a Notary Public in and for said County and State, personally appeared _____________________________________, Owner, subscribed and sworn before this _____ day of __________________, ______. ___________________________ ___________________________________ County of Residence Signature ___________________________ ___________________________________ Commission Expiration Date Printed Name LOCATION MAPS LOCATION MAP Date: February 16, 2022FIGURE 1.1 WEIHE weihe.net Indianapolis, Indiana 46280 10505 N. College Avenue 317 | 846 - 6611E N G I N E E R S PROJECT LOCATION BEDFORD FALLS OF CARMEL CARMEL, IN GGGGGGGGGGGOHUOHUOHUOHUOHUOHUOHUOHUZONE AE161718W W W *C.A. CC.A. CGUARDRAILFIGURE 2 WEIHE weihe.net Indianapolis, Indiana 46280 10505 N. College Avenue 317 | 846 - 6611E N G I N E E R S BEDFORD FALLS OF CARMEL CARMEL, IN WATER QUALITY LOCATION EXHIBIT Date: August 29, 2022 CONTECH CS-8 WET DETENTION BASIN OUTLET CONTROL STR. SPILLWAY DRAINAGEESMT.BMP MAINT. & STORMWATERESMT.NATIVE BANKS CHECKLISTS AND MAINTENANCE ACTIVITIES \ Post-Construction BMP Inspection Checklist Detention pond Stormwater Ordinance Technical Standards Detention Pond O&M 1 of 2 July 2004 Healthy vegetation with at least 85% ground cover. No signs of erosion on embankment. No animal burrows. Embankment is free of cracking, bulging, or sliding. Embankment is free of woody vegetation. Embankment is free of leaks or seeps Emergency spillway is clear of obstructions. Vertical/horizontal alignment of top of dam “As- Built” Low flow outlet free of obstruction. Trash rack is not blocked or damaged. Riser is free of excessive sediment buildup Outlet pipe is in good condition. Control valve is operational Outfall channels are stable and free of scouring. Post-Construction BMP Inspection Checklist Detention pond Stormwater Ordinance Technical Standards Detention Pond O&M 2 of 2 July 2004 No Evidence of undesirable vegetation No accumulation of floating or floatable debris No evidence of shoreline scour or erosion Sediment is being collected by forebay(s) Forebay is not in need of cleanout (less than 50% full) Healthy vegetation with at least 85% ground cover. No undesirable woody vegetation Low flow channels clear of obstructions No evidence of sediment and/or trash accumulation No riprap failures No evidence of slope erosion or scouring Storm drain pipes are in good condition, with no evidence of non-stormwater discharges Endwalls/Headwalls are in good condition SECTION A-A SECTION B-B A A BB POND OUTLET STRUCTURE #640 NOT TO SCALE DETAIL EXHIBIT WEIHE weihe.net Indianapolis, Indiana 46280 10505 N. College Avenue 317 | 846 - 6611E N G I N E E R S DETAIL EXHIBIT WEIHE weihe.net Indianapolis, Indiana 46280 10505 N. College Avenue 317 | 846 - 6611E N G I N E E R S Site Name: Owner Name: Owner Address: Owner Phone Number: Emergency Phone Number: Location: Date: Time: Inspector: Change in ownership since last inspection? Maintenance Item Maintenance (1 or 2)*Maintenance is needed:Comments Trash or debris which is located immediately in front of the catch basin opening or is blocking inletting capacity of the basin by more than 10% Trash or debris (in the basin) that exceeds 60 percent of the sump depth as measured from the bottom of basin to invert of the lowest pipe into or out of the basin, but in no case less than a minimum of six inches clearance from the debris surface to the invert of the lowest pipe. Trash or debris in any inlet or outlet pipe blocking more than 1/3 of its height. Dead animals or vegetation that could generate odors that could cause complaints or dangerous gases (e.g., methane). Sediment Sediment (in the basin) that exceeds 60 percent of the sump depth as measured from the bottom of basin to invert of the lowest pipe into or out of the basin, but in no case less than a minimum of 6 inches clearance from the sediment surface to the invert of the lowest pipe. Top slab has holes larger than 2 square inches or cracks wider than 1/4 inch (Intent is to make sure no material is running into basin). Frame not sitting flush on top slab, i.e., separation of more than 3/4 inch of the frame from the top slab. Frame not securely attached Maintenance person judges that structure is unsound. Grout fillet has separated or cracked wider than 1/2 inch and longer than 1 foot at the joint of any inlet/outlet pipe or any evidence of soil particles entering catch basin through cracks. Settlement/Misalignment If failure of basin has created a safety, function, or design problem. Vegetation growing across and blocking more than 10% of the basin opening. Vegetation growing in inlet/outlet pipe joints that is more than six inches tall and less than six inches apart. Contaminants and Pollution Any evidence of oil, gasoline, contaminants or other pollutants (Coordinate removal/cleanup with local water quality response agency). Trash & Debris Y OR N Vegetation Fractures or Cracks in Basin Walls/Bottom Structure Damage to Frame and/or Top Slab Inspection and Maintenance Checklist Low Flow Outlet Structure Cover is missing or only partially in place. Any open catch basin requires maintenance. Mechanism cannot be opened by one maintenance person with proper tools. Bolts into frame have less than 1/2 inch of thread. One maintenance person cannot remove lid after applying normal lifting pressure (Intent is to keep cover from sealing off access to maintenance). Ladder Ladder is unsafe due to missing rungs, not securely attached to basin wall, misalignment, rust, cracks, or sharp edges. Metal Grates Trash and debris that is blocking more than 20% of grate surface inletting capacity. *Maintenance: Enter 1 if maintenance is need and include WO#. Enter 2 if maintenance was performed same day. Catch Basin Cover Site Name: Owner Name: Owner Address: Owner Phone Number: Emergency Phone Number: Location: Date: Time: Inspector: Change in ownership since last inspection? Maintenance Item Maintenance (1 or 2)*Maintenance is needed:Comments Sediment & Debris Accumulated sediment exceeds buildup 1/4" of the pipe diameter up to maximum of 6" Vegetation Vegetation that reduces free movement of water through the pipes Protective coating is damaged; rust is causing more than 50% deterioration to any part of the pipe Any dent that decreases the cross section area of pipe by more than 20% or puncture that impacts performance *Maintenance: Enter 1 if maintenance is need and include WO#. Enter 2 if maintenance was performed same day. Inspection and Maintenance Checklist Y OR N Damaged Pipe Conveyance Stormwater Pipe Site Name: Owner Name: Owner Address: Owner Phone Number: Emergency Phone Number: Location: Date: Time: Inspector: Change in ownership since last inspection? Maintenance Item Maintenance (1 or 2)*Maintenance is needed:Comments Sediment & Debris Accumulated sediment that exceeds 20% of the design depths Vegetation Vegetation that reduces free movement of water through the ditches Eroded damage over 2 inches deep where cause of damage is still present or where there is potential for continued erosion Any erosion observed on a compacted berm embankment Trash and debris > 5cf per 1,000 sf (one standard size garbage can Visual evidence of dumping *Maintenance: Enter 1 if maintenance is need and include WO#. Enter 2 if maintenance was performed same day. Erosion Damage to Slopes and Channel Bottom Trash and Debris Y OR N Inspection and Maintenance Checklist Conveyance Open Ditch INLET 1OUTLET 18'Ø I.D.9'-6"Ø O.D.(2) 24"Ø x 4"FRAME AND COVERPLAN VIEW(INTERNALS NOT SHOWN)CASCADEFIBERGLASSINTERNALS2'-0" OFFSET2'-0" OFFSETSECTION FOR PIPE ORIENTATION(TOP SLAB NOT SHOWN)OUTSIDE BOTTOMELEV. 876.26'TOP OF SYSTEMELEV. 889.68' OUTLET 1 INVERTELEV. 883.34'INLET 1 INVERTELEV. 883.34'RIM ELEV. 890.70+/- INLET 124"Ø RCP(36"Ø OPENING)OUTLET 124"Ø RCP(36"Ø OPENING)SOLIDSSTORAGESUMPPERMANENTPOOLCASCADECYLINDERINSERTCONTRACTOR TO PROVIDEGRADE RINGS/RISERSCONTRACTOR TO GROUT TOFINISHED GRADE7'-1"7'-414" 1'-014"9'-6"ØELEVATION VIEW07/08/22DATE:APPROVED:CHECKED:SHEET:\\PSUWQKTWCRMF01.QUIKRETE.NET\MERLIN\PROJECT\ACTIVE\699200\699244\699244-10-CASCADE\DRAWINGS\699244-010-CS-8-CONFAB.DWG 7/11/2022 11:46 AM OFMDBDRAWN:DESIGNED:The design and information shown on this drawing is provided as a service to the project owner, engineer and contractor by CONTECH Construction Products Inc. or one of its affiliated companies ("CONTECH"). Neither this drawing, nor any part thereof, may be used, reproduced or modified in any manner without the prior written consent of CONTECH. Failure to comply is done at the user's own risk and CONTECH expressly disclaims any liability or responsibility for such use. If discrepancies between the supplied information upon which the drawing is based and actual field conditions are encountered as site work progresses, these discrepancies must be reported to CONTECH immediately for re-evaluation of the design. CONTECH accepts no liability for designs based on missing, incomplete or inaccurate information supplied by others.699244SEQUENCE No.:10PROJECT No.:MDBMDBMSB11www.ContechES.comCONTRACTCONTECHDRAWINGNCILAYOUT 1AGENERAL NOTES1.CONTECH TO PROVIDE ALL MATERIALS UNLESS NOTED OTHERWISE.2.FOR FABRICATION DRAWINGS WITH DETAILED STRUCTURE DIMENSIONS AND WEIGHTS, PLEASE CONTACTYOUR CONTECH REPRESENTATIVE. www.ContechES.com3.CASCADE SEPARATOR WATER QUALITY STRUCTURE SHALL BE IN ACCORDANCE WITH ALL DESIGN DATA ANDINFORMATION CONTAINED IN THIS DRAWING. CONTRACTOR TO CONFIRM STRUCTURE MEETSREQUIREMENTS OF PROJECT.4.STRUCTURE SHALL MEET AASHTO HS-20 LOAD RATING, ASSUMING EARTH COVER OF 0' - 2', ANDGROUNDWATER ELEVATION AT, OR BELOW, THE OUTLET PIPE INVERT ELEVATION. ENGINEER OF RECORD TOCONFIRM ACTUAL GROUNDWATER ELEVATION. CASTINGS SHALL MEET AASHTO M306 AND BE CAST WITHTHE CONTECH LOGO.5.CASCADE SEPARATOR STRUCTURE SHALL BE PRECAST CONCRETE CONFORMING TO ASTM C-478 ANDAASHTO LOAD FACTOR DESIGN METHOD.INSTALLATION NOTESA.ANY SUB-BASE, BACKFILL DEPTH, AND/OR ANTI-FLOTATION PROVISIONS ARE SITE-SPECIFIC DESIGNCONSIDERATIONS AND SHALL BE SPECIFIED BY ENGINEER OF RECORD.B.CONTRACTOR TO PROVIDE EQUIPMENT WITH SUFFICIENT LIFTING AND REACH CAPACITY TO LIFT AND SETTHE CASCADE SEPARATOR MANHOLE STRUCTURE.C.CONTRACTOR TO ADD JOINT SEALANT BETWEEN ALL STRUCTURE SECTIONS, AND ASSEMBLE STRUCTURE.D.CONTRACTOR TO PROVIDE, INSTALL, AND GROUT PIPES. MATCH PIPE INVERTS WITH ELEVATIONS SHOWN.ALL PIPE CENTERLINES TO MATCH PIPE OPENING CENTERLINES.E.CONTRACTOR TO TAKE APPROPRIATE MEASURES TO ASSURE UNIT IS WATER TIGHT, HOLDING WATER TOFLOWLINE INVERT MINIMUM. IT IS SUGGESTED THAT ALL JOINTS BELOW PIPE INVERTS ARE GROUTED.STRUCTURE WEIGHTAPPROXIMATE HEAVIEST PICK = 27500 LBS.OF 4 PIECESMAXIMUM FOOTPRINT = 9'-6"ØCS-8 - 699244-10 BEDFORD FALLS OF CARMEL CARMEL, IN for SYSTEM: WQ601 REVISION DESCRIPTIONDATEMARK BY ---- MATERIAL LIST (PROVIDED BY CONTECH)COUNTDESCRIPTIONINSTALLED BY1CS-8 FIBERGLASS CYLINDER INSERT, STD.CONTECH6CS-8 ALUMINUM INSTALLATION BRACKETCONTECH1SEALANT FOR JOINTSCONTRACTOR224"Ø x 4" FRAME AND COVER, EJ#41600389, OR EQUIV.CONTRACTOR STRUCTURES 602 & WQ601STR WQ601CS-8STR 602108" DIA MANHOLESTRUCTUREINV = 883.27INV = 883.27WEIR ELEV = 887.84INV = 883.41INV = 883.41INV = 883.34INV = 883.3427' OF 24" RCP27' OF 24" RCP30" RCP30" RCP4'-0"15" RCPINV = 883.41