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DESIGN STANDARDS & REVIEW GUIDELINES

This Design Standards Manual has been developed for use by engineers, consultants and developers working on water, sanitary, and stormwater utility projects within the City of Bloomington Utilities’ (CBU) jurisdiction in Bloomington, Indiana; and should be used in conjunction with the current issue of Construction Specifications for City of Bloomington Utilties. This manual does not constitute a complete list of design criteria, but is to be used as a guide that will provide conformity to the design and plan review process. These Standards are not intended to replace sound engineering judgment nor any applicable standards of practice, permits, laws, or rules and regulations enforced by local, state, or federal guidelines. Designers should consider the applicability of the contents of this document to specific projects and, based on the characteristics and requirements of the projects, make adjustments accordingly.

The sections of this manual identify routine or standard design assumptions and practices used and accepted by this Department. Deviations from these Standards, and special or unique design situations should be thoroughly addressed in writing to the Utilities Engineer for acceptance and approval during the plan review process.

Each of the items listed within this manual may or may not be individually addressed in plan review correspondence to the engineer or consultant, but all guidelines applicable to a project will be required to be met prior to Final Acceptance and Approval of the plan design.

All Utility Project Review Applications and plan sets submitted to CBU should be routed to the Engineering Utilities Technician for check in and distribution. A Notification of Receipt of Plans letter will be issued listing your project data and review team.

Submitting Plans in Person or via Mail / Parcel Delivery:

City of Bloomington Utilities
Attn: Engineering Utilities Technician
600 E Miller Drive
Bloomington, IN 47401
Monday – Friday, 8:00am – 5:00pm
 

 

PLAN SUBMISSION REQUIREMENTS:

CBU requires a hard copy of the plans to be submitted for review for all projects. All plan sets submitted to CBU should be routed to the Engineering Utilities Technician for check in and distribution. Please complete the Plan Review Application and include it with your initial submittal. Walk-in drop off is available during normal business hours: M-F 8:00am - 5:00pm.

Plan Submittal Process, Review Guidelines, Forms, & FAQ’s:

Additional information and forms are available on our website at: www.bloomington.in.gov/utilities/review

Initial Submittal:

Complete the Utility Plan Review Application (available in our Forms & FAQ section of the website) and include it with your first plan submittal to our office.

Preliminary Design Submittals:

If you are submitting plans to satisfy another department’s requirements, and are not prepared for a full plan review, make notations as such on your Utility Plan Review Application form along with any additional information that will identify the level of review required at this time.

Review Teams:

CBU will assign a group of team members to each project based upon the items involved with it. Most projects will include a primary Project Reviewer, but may also include any, or all, of the following staff members: Engineer, Backflow Reviewer, Pretreatment Reviewer, Landscaping & Easement Reviewer, and Fireline/New Services Reviewer.

Project Review Timelines:

Plans are reviewed based upon the date of submittal. CBU aims to maintain a standard review timeline of 2-4 weeks to allow for all parties to have adequate time to review their portion of the project. This timeline will not be adjusted to accommodate requests for a full review to be expedited. Immediate reviews of a minor revision for correctness are at the discretion of the Project Reviewer.

Construction Plans are to Include:

  • Preferred sheet size: 24” x 36”, and are to be drawn to scale
  • Title page with Owner/Developer Contact Information, Index, Location Maps, Site Address, and North Arrow
  • Demo Plan
  • Site Plan, Applicable Notes, Easements (existing & proposed)
  • Utility Plan & Profiles, All Existing & Proposed Utilities, Applicable Notes, and Legends
  • Grading/Erosion Control
  • SWPPP
  • Landscaping Plans (if applicable; refer to the Landscaping & Easement section below)
  • Plumbing Plans (if applicable; refer to the Backflow & Pretreatment sections below)
  • Standard Details
  • All Final Plans must be certified by a Civil Engineer

 

Unrevised Plan Submittals:

Any unchanged item noted in plan review correspondence must be addressed in writing and included with future plan submittal(s). CBU reserves the right to refuse further review of items outlined in previous review letters, unless otherwise addressed. Continued submittal of unrevised plans by the engineer, consultant, or developer, may result in lengthy delays of the review process and potentially affect project timelines.

Final Plan Submittal:

Upon CBU’s final acceptance of a plan set, the Engineer of record is to submit 2 hard copies of the certified plans along with digital PDF & DWG files (the civil set and any associated plumbing and/or landscaping sheets required for the project) via CD, thumb drive, share drive, or emailed to: UtilitiesPlanReview@bloomington.in.gov. Please refer to the list below for the specifications of each file type. Check list is also available on our website.

 
PDF files

Include both the civil construction plan set and any associated plumbing sheets required for the project.

  • Title page w/ sheet index and developer contact information
  • Demo (if applicable)
  • Site plan w/ Easements
  • Utility plan w/ ALL Utilities (existing & proposed)
  • Grading plan / Erosion control
  • SWPPP (if applicable)
  • Landscaping plan (if applicable)
  • Details
  • Plumbing plan & associated sheets (if applicable)
 
DWG files

Files must contain the following data layers on the SITE PLAN:

  • Buildings
  • Edge of pavement
  • Centerlines
  • Parking
  • Sidewalks, sidepaths, and trails
  • Fences
  • Easements:
    • Access
    • Conservation
    • Drainage
    • Sewer
    • Water
  • Lot lines
  • Lot numbers
  • Rights of way
  • Setbacks
  • Subdivision boundary
  • Development boundary
  • Phase lines
  • Section lines
  • Water bodies
  • Water lines (linear hydrologic features)
  • Retaining walls
  • Labels and other text

 

Expiration:

Final Acceptance and Approval are valid for one (1) year from the date appearing on the letter in which Final Acceptance and Approval are given. Construction may not begin without final acceptance and approval of the plans. After one year has elapsed, resubmittal of plans will be required.

Correction of Omissions and Oversights:

CBU reserves the right to address and correct any oversight or omission made during plan review. This may be done at any time, even after Final Acceptance and Approval have been given, or during construction.

Construction Specifications:

All sanitary, storm, and water construction shall be in accordance with the issue of the CBU Construction Specifications in effect at time of Final Acceptance and Approval, as well as all other applicable standards, permits, laws, rules and regulations. The current CBU Specifications are available on the web at www.bloomington.in.gov/utilities/contractors under the category "Contractors, Builders, and Professional Services".

 

RULES & REGULATIONS

 

STANDARD DETAILS

 

GENERAL:

Show Location of ALL Utilities, Existing and Proposed:

The plan drawings shall show location of all utilities, both existing and proposed, including, but not limited to, telephone, electricity, gas, and fiber. All water, sanitary sewer, and storm sewer shall be identified by symbology as privately owned or as CBU owned at the time the plans are submitted for review. Without these locations, further plan submittals will not be reviewed.

Extension of Public Sewer and Water Mains:

Any project which includes extension of Public sanitary, storm, and water mains requires completion and submission of the CBU form “Application for Extension of Public Utility Service”. All sanitary, storm, and water mains to be taken over by CBU will require submittal of both plan and profile drawings for review. Said drawings shall show all crossings of all utilities and any utility, tree, or structure within a minimum of fifteen feet of the proposed main.

Water Main Extension Requirements:

  • Submit the Plan & Profile sheets as part of the construction plans
  • Water Model
  • Submit IDEM Notice of Intent Application for review and signature.
    • PWS and Peak Demand Data is available under the Forms & FAQ section of the website, or by calling the Utilities Technician at (812)349-3676.

Sanitary Sewer Main Extension Requirements:

  • Submit the Plan & Profile sheets as part of the construction plans.
  • Submit IDEM Application for Sanitary Sewer Construction Permit for review and signature.

Ownership of Sewer and Water Mains:

It shall be understood that it is common policy for CBU to take over and maintain new sanitary sewer mains 8-inch and larger, all new storm sewers in Public Rights of Way, within our jurisdiction, and all new water mains, which are not behind a master meter, which serve the general public. The service line for firelines and master metered lines should be designated as private. Any exceptions must be indicated with symbology on the plans, addressed by letter, and approved in writing by the Utilities Engineer. Ownership of all CBU-designated mains will take effect after the final walk-through is completed, verification that all easements are recorded, and final acceptance is given.

Utility Notifications:

Please include the following notes on the Utility Plan sheets of all future plan submittals.

Pre-Construction Meeting:

All projects will require a pre-construction meeting with the CBU prior to the start of construction. The contractor and/or developer must contact the Engineering Utilities Technician at (812)349-3676 to schedule the meeting, which will be held at CBU’s office.

Utilities Inspection:

Contractor shall notify CBU’s Engineering Department a minimum of one (1) working day prior to construction of any water, storm or sanitary sewer utility work. A CBU inspector must have notice so work can be inspected, documented, and a proper as-built made. When a contractor works on weekends, a CBU-designated holiday, or beyond normal CBU work hours, the contractor will pay for the inspector’s overtime. For work hours and holiday information, please contact CBU’s Engineering Department at (812)349-3660.

Phasing:

By submitting this plan set for review, it is understood the utility infrastructure is to be constructed as shown on the approved plan set and installed in its entirety. Any modifications or proposed phasing of the infrastructure automatically requires permission from CBU and will require a submittal of the revised plans and/or water system hydraulic calculations for review and approval by CBU.

Thrust Restraint:

The use of concrete thrust blocks or “kickers” for restraint is not acceptable in the CBU Jurisdictional Area. Instead, mechanical restraints shall be used in accordance with Section 4.5.3.4.1.1. of the CBU Construction Specifications.

Grading, Fill and Compaction:

All rough grading, fill and compaction shall be complete before construction of any sewer or water main.

 

WATER:

IDEM Notice of Intent to Construct a Water Main Extension:

All water main extensions require IDEM construction approval. If this project includes extension of a water main, please submit the completed IDEM form, “Notice of Intent to Construct a Water Main Extension”, to our office for review and signature. The most current PWS information is available under our Forms & FAQ’s section of the website.

Water Main Installation Credit:

If this project includes installation of water mains, they may be eligible for Water Main Installation Credit (formerly referred to as water rebates). Please see Sections 18.14 through 18.15 of the CBU Rules, Regulations and Standards of Service to determine eligibility. If the developer determines that his project is eligible and he wishes to pursue this matter, he must contact the Utilities Department after the mains have been installed and provide the necessary information in the proper format. Contact the Project Coordinator - New Services at 812-349-3689 for additional information.

Water Calculations:

If this project includes installation of water mains, please provide us with a copy of your water calculations for this project. System pressure and flow data used for design must be adjusted for low tank level. If you require such data, please call the New Services Coordinator at (812)349-3689.

Mains Providing Fire Service:

Refer to the FIRELINE section below.

Small-diameter PVC Mains:

PVC pressure pipe may be used in construction of 2-inch or 4-inch water mains to be taken over by CBU. In such case, the 2-inch pipe shall be SDR-21 (PR200), and the 4-inch pipe may be either SDR-21 (PR200) or C900 (DR-14). A #10 insulated solid copper wire shall be wrapped around the pipe so that one revolution is made at least every pipe joint. Splices are to be made with an approved connector, and are to be suitably protected against corrosion. The wire is to be brought to the surface at least every 500 feet to a valve box.

Service Lines and Meters:

Refer to the NEW SERVICES & TAPS section below.

Polyethylene Encasement:

ALL ductile iron pipe (DIP) will require polyethylene encasement sleeves and shall be 8-mil linear low-density (LLD) polyethylene encasement or 4-mil high-density cross-laminated (HDCL), polyethylene encasement material, inclusive of valves and fittings. The material shall be furnished and installed in accordance with ANSI/AWWA C-105/A21.5, using plastic tie straps or circumferential wraps of adhesive tape providing the pipe with a secure protective enclosure.

Backflow Prevention:

Refer to the BACKFLOW PREVENTION section below.

Payment for Oversizing:

Section 13.4 of the CBU Rules, Regulations and Standards of Service states, “If, for the Utility’s future plans, a water or sewer line larger than the one required for the extension is needed, the Utility will pay for the increase in cost. This increase in cost will be determined as follows. The cost of pipe and appurtenances will be determined for the proposed line and for the line required by the Utility. The Utility will pay this difference in cost plus twenty percent (20%). In no case will the cost of the proposed line be less than the cost to install a 6 inch water line or an 8 inch sewer line.” Contact the Project Coordinator - New Services at 812-349-3689 for additional information.

 

FIRELINES:

Any new construction or remodeled project that is subject to the installation of a Fireline, must submit calculations from the fireline designer along with a plan sheet for the fire suppression system layout & connections. Refer to the Fireline section below for all requirements to be included on your utilility plan submittal (fireline and/or fireline & domestic water combo). Also refer to Standard Details #7a, 7b, & 7c and the Backflow Prevention requirements.  Please note that effective 12/06/2019, Standard Details #28 & 29 are no longer valid.

Mains Providing Fire Service:

All water mains which provide fire service through either fire hydrants or fire suppression systems must be constructed of Class 350 DIP. Mains providing flow for fire suppression systems are referred to as “Fire Lines,” and are to remain private. See CBU Construction Specification 4.5.3.3. Installation of Fire Lines, for requirements. Such Fire Lines must be designed in consideration of suppression system demand, as well as, CBU water system pressure and flow, for that area. The valve on the DCDA will be used to hydrostatically pressure test against. Please call the Project Coordinator - New Services at (812) 349-3689 for further information. Please contact Bloomington Fire Inspection Officer (cell: 812-360-3520 or office: 812-349-3889) for placement of post indicator valve (PIV) and Storz type fire department connection (FDC).

Fireline calculations:

Are to be submitted to the Project Coordinator - New Services for review along with our Fireline Designer’s Letter (template available on our website).

FLOW DATA REQUESTS:

This information is to be used for water modeling purposes only and not for fire suppression system design. If there is going to be a fire suppression system, the designer for that system needs to contact us separately.

FIRELINE DESIGNERS (Fire Suppression System Design):

The designer for the fire suppression system needs to contact CBU and submit Calculations, a "Fireline Designer's Letter", Fireline Application, and a Fire Suppression Plan Sheet for review. All data requests and submittals should be directed to the Project Coordinator - New Services at (812)349-3689, or emailed to: UtilitiesPlanReview@bloomington.in.gov. For a copy of the letter template and application, please refer to the FORMS Section of the website.

Backflow Prevention:

Refer to the BACKFLOW PREVENTION section below.

Touchpad and Radio-Read Device:

The developer and/or contractor must install conduit (and proper wiring) for the touchpad unit used to obtain readings for the detector meter on the backflow prevention device. The radio read unit must be obtained through CBU. Refer to Detail #34 for wiring specifications and installation requirements. Contact the New Services Coordinator at (812) 349-3689 for additional details regarding the radio read device and associated fees. Fee information is also available on our website.

INSTALLATION DETAILS:

  1. Use minimum 3 conductor 22 AWG telephone cable needs ran through conduit from the detector meter on the backflow device, through an exterior wall
  2. The device has two components; the Touchpad, which is approx 3” x 2”, and the cover, which is approx. 4" W x 6” T x 2" thick. We require “others” to mount the Touchpad on the outside of the wall, high enough to be out of reach from tamper, but low enough to be accessible with a ladder. The device is obtained from CBU; refer to fee chart.
  3. Do NOT connect the wires, leave them hanging loose. CBU will make the wiring connections on each end and attach the cover when we come to program the device.
  4. Additionally, if the detector meter on the backflow device is not a Sensus meter, CBU will change it out; refer to fee chart. The backflow devices may be able to be ordered with the piping for the meter but without the meter in place.
  5. Refer to Standard Detail #34

 

BACKFLOW PREVENTION:

Backflow Prevention:

A reduced pressure principle assembly is recommended on all commercial customer service lines and multifamily service lines. An approved backflow prevention assembly is required on all customer service lines if the building will house a designated cross connection hazard as specified by 327 IAC 8-10-4 or as determined by CBU.

Utility Notifications:

Please include the following note on the Utility Plan & Plumbing Plan sheet(s) of all future plan submittals that require a Backflow Prevention device.

  • Backflow Device Testing Requirements:  All devices must be tested by an Indiana Registered Cross Connection Control Device Inspector upon installation and at intervals not to exceed 12 months.  Results are to be submitted to CBU via www.trackmybackflow.com.  Contact the Environmental Program Coordinator at (812)349-3948 with any questions.

Plumbing Plan Requirements:

Include the following requirements on your plumbing plan submittal (domestic water / fireline / irrigation). Also refer to Standard Details #7a, 28, 29 and 31.  Please note that Details #28 & 29 have been updated (3/31/2020 and 4/1/2020, respectively).  Also, new Standard Details #7b and 7c will be forthcoming and will be added at a later date.

Plumbing layout diagram

  • All Water Supply Service Lines (Domestic, Irrigation, Fireline) must be labeled and shown separately. Example: WSL = Water Service Line (or Domestic Line), FL = Fire Line, etc.
  • Label each of the fixtures and show the points of connection from the service line to the fixture.
  • Indicate the location, the make and model number of the backflow prevention device(s).
  • Plans must be drawn to scale.
  • On Remodel projects, notate on the plans which fixtures are existing or proposed. This can be done via a numbered Plan Note.

For more information about backflow prevention requirements or to seek approval for a proposed device, please contact the Environmental Program Coordinator at (812) 349-3948. Additional Program details, Informational Brochures, Standard Details, Approved Devices, Installation, Inspection, and Testing Requirements, and submission of the testing reports are available under the Backflow Prevention section of our website.

 

SAMPLE DIAGRAM:

plumbing layout (water)
Internal Plumbing Layout Diagram: Water Lines with Backflow Device(s)

 

NEW SERVICES & TAPS:

Waiver of Protest to Annexation:

Before a new development outside the corporate limits can receive City sanitary sewer service, the developer must sign a blanket waiver of protest to annexation for all property within the project area, in accordance with Indiana Administrative Code 36-9-22-2. No water meters will be set until the waiver has been signed. For further information, contact the City Legal Department (812-349-3427). Submit a copy of the recorded Waiver of Protest to Annexation document to the Project Coordinator - New Services at CBU.

Fixture count data:

To be submitted to the Project Coordinator - New Services to accurately size meters and service lines. The appropriate form(s) are available on our website.

Taps:

All taps on existing sewer and water mains owned by CBU must be made by CBU personnel. Please call the Project Coordinator - New Services at (812)349-3689 for information on taps and fees.

Service Lines and Meters:

Project Coordinator - New Services must size service lines and meters. Please provide an accurate fixture count for each building. At your request, information on fees will also be provided (812-349-3689).

Applications and Connection Fees:

All connection fees are to be paid in advance of installation of service and/or meter. Please call the Project Coordinator - New Services at (812)349-3689 for information on applications for service, and fee quotes. Fee information is available on our website.

 

SANITARY SEWER:

IDEM Sewer Construction Permit:

IDEM has informed us that ALL Sanitary sewer extensions, regardless of length, require an IDEM Sewer Construction Permit. If your plans include sanitary sewer, please provide us with a copy of your completed IDEM application form. Please be certain to include the Capacity Certification/Allocation Letter (Acceptance of Flow Form).

For all application & permit correspondence, please list the following cc contact information for CBU as follows:

City of Bloomington Utilities

Attn: Engineering Dept

PO Box 1216

Bloomington, IN 47402-1216

Email: UtilitiesPlanReview@bloomington.in.gov

 

Clean-outs:

Reference section 4.5.2.1.5.1 of the CBU Construction Specifications.

Grease Interceptor:

Refer to the PRETREATMENT section below.

C900 Pipe:

Wherever C900 pipe is used for sanitary sewer, all wyes shall be HARCO, sized for C900 on the run and SDR-35 on the branch. Transition from C900 to SDR-35 pipe shall be made by use of a HARCO C900 to SDR-35 Adapter.

Ductile Iron Pipe:

All DIP used for sanitary sewer shall have a ceramic epoxy lining, minimum thickness 40 mils and shall be Protecto 401. Wyes for DIP shall be HARCO DIP to SDR-35 Adapter Wyes.

Connection to an Existing Manhole:

When connecting a new pipe to an existing manhole, the manhole shall be core-drilled. Pipe shall be connected to the manhole by either a flexible boot KOR-N-SEAL 1 or 2 flexible connector or approved equal. Invert of the connection shall be no more than one foot higher than invert out for this structure. Table and trough shall be modified as necessary to direct the flow from the new pipe.

Slopes greater than 20.00%:

Concrete anchors shall be required for stabilization of any pipe having a slope greater than 20.00%. The pipe for the entire run shall be Class 350 DIP with a ceramic epoxy lining, minimum thickness 40 mils and shall be Protecto 401.

Force Mains & Wastewater Lift Stations:

Engineer is to submit calculations and lift station specifications for review. Indicate the ownership of the force main and/or lift station by line type.

Payment for Oversizing:

Section 13.4 of the CBU Rules, Regulations and Standards of Service states, “If, for the Utility’s future plans, a water or sewer line larger than the one required for the extension is needed, the Utility will pay for the increase in cost. This increase in cost will be determined as follows. The cost of pipe and appurtenances will be determined for the proposed line and for the line required by the Utility. The Utility will pay this difference in cost plus twenty percent (20%). In no case will the cost of the proposed line be less than the cost to install a 6 inch water line or an 8 inch sewer line.” Contact the Project Coordinator - New Services at 812-349-3689 for additional information.

 

PRETREATMENT PROGRAM:

Grease Interceptor:

An exterior grease interceptor must be provided if the building will house a Food Service Establishment as defined by Bloomington Municipal Code Chapter 10.17. Grease interceptors shall be sized according to the 2006 Uniform Plumbing Code Gravity Grease Interceptor Sizing Method (Table 10-3) or other sizing method that provides a minimum 30 minute hydraulic retention time. Precast concrete grease interceptors must be designed and constructed in accordance with the City of Bloomington Utilities Department’s Standard Grease Interceptor Detail (Detail #21). Plan submittals must include the location and calculated volume of the interceptor, CBU interceptor detail #21 or a pre-approved alternative interceptor detail, and the plumbing layout of all kitchen fixtures and “grease only” sewer lines, both interior and exterior. Wastewater from 3-bay sinks, pre-rinse sinks, mop sinks, hand sinks, and floor drains shall be discharged into the grease interceptor. Commercial dishwashers shall not be plumbed to the grease interceptor. The installation of new or the replacement of existing garbage disposal units in Food Service Establishments is prohibited. For more information about grease interceptor requirements or to seek approval for a proposed interceptor installation, please contact the Pretreatment Program Inspector at (812) 349-3934.

Plumbing Plan Requirements:

All Food Service Establishment (FSE) plans or Commercial developments within areas zoned for FSE’s must include these items before approval will be granted for Grease Interceptor installation. Sample diagrams are available on our website under the Pretreatment Program section.

Plumbing Diagram (Internal Layout)

  • All Water Supply Service Lines, Firelines, Sanitary Waste and Grease Waste lines must be labeled and shown separately. Example: WSL = Water Service Line (or Domestic Line), FL = Fire Line, SSL = Sanitary Sewer Line, GWL = Grease Waste Line.
  • Label each of the fixtures, floor drains, cleanouts, vents, etc in their proper location. Include the fixture trap arm size and show the points of connection from the fixture to the proper waste line.
  • Plans must be drawn to scale.
  • On Remodel projects, notate on the plans which fixtures are existing or proposed. This can be done via a numbered Plan Note.

Grease Interceptor (External Plan Layout)

  • Grease interceptor standard detail or specification sheet from the manufacturer (example: Proceptor unit).
  • Type & Size of the grease interceptor unit
  • Connection of the grease waste line into the GI unit
  • Show where the GI unit will connect back into the existing lateral; or the new connection point on the City main.
  • Include locations of the clean outs, vents, sampling ports, etc.

Oil-Water Separator:

If you are installing an Oil-Water Separator, please contact the Pretreatment Coordinator at (812)349-3946 or Pretreatment@bloomington.in.gov.

Product Manufacturing:

If you manufacture any product, complete the Wastewater User Survey (Manufacturing User / short form) and submit it to the Pretreatment Program Coordinator at Pretreatment@bloomington.in.gov.

Brewery / Distillery:

If your facility plans to manufacture alcohol, you will be included in our High Strength Surcharge Program. Please contact our Pretreatment Coordinator for more details at Pretreatment@bloomington.in.gov.

Industrial Pretreatment:

If you manufacture any product, complete the Wastewater User Survey (Industrial User / long form) and submit it to the Pretreatment Program Coordinator at Pretreatment@bloomington.in.gov. Link: (long form)

 

PRETREATMENT SPECIFICATIONS:

Precast Concrete Grease Interceptors:

Manufacturer Size
   
Precast Solutions 750 Gallon
Precast Solutions 1000 Gallon
Precast Solutions 1250 Gallon
Precast Solutions 1500 Gallon
Precast Solutions 2000 Gallon
   
Sexton Wilbert 750 - 3000 Gallon

Non-Concrete Grease Interceptors:

  • Schier Products    *This product line is currently under review by CBU staff.  Any proposed devices must be rated at 100 GPM minimum.  

Grease Proceptors:

Grease Traps: Automatic Grease Removal Devices

**These devices are only approved as replacement devices for EXISTING grease traps.  No approvals will be granted on new installations. 

Brand Model Flow Rate Grease Retention
       
Grease Guardian GGX15 15 GPM 30+ Lbs
Grease Guardian GGX20 20 GPM 40+ Lbs
Grease Guardian GGX25 25 GPM 50+ Lbs
Grease Guardian GGX35 35 GPM 70+ Lbs
Grease Guardian GGX50 50 GPM 100+ Lbs
Grease Guardian GGX75-IS 75 GPM 150+ Lbs
Grease Guardian GGX75-AST 75 GPM 150+ Lbs
Grease Guardian GGX125-IS 125 GPM 250+ Lbs
Grease Guardian GGX125-AST 125 GPM 250+ Lbs
       
Big Dipper W-200-IS 20 GPM 47 Lbs
Big Dipper W-250-IS 25 GPM 56.4 Lbs
Big Dipper W-350-IS 35 GPM 85.18 Lbs
Big Dipper W-500-IS 50 GPM 108.4 Lbs
Big Dipper W-750-IS 75 GPM 168.95 Lbs
Big Dipper W-1000-IS 100 GPM 207.6 Lbs

 

SAMPLE DIAGRAM(S):

Grease Interceptor: External Connections
Grease Interceptor: External Connections 
Plumbing Plan - ISOMETRIC DIAGRAM
Isometric Plumbing Diagram & Pipe Size Legend
Internal Plumbing Layout Diagram: Sewer & Grease Lines
Internal Plumbing Layout Diagram: Sewer & Grease Lines

 

STORMWATER:

Stormwater Calculations:

For all projects, calculations which support pipe sizing and inlet location must be submitted for review. Stormwater structures shall be designed for the 10-year storm without surcharging and checked to insure that structures are protected from flooding during the 100-year storm.

The Drainage Report should include:

  1. Drainage Calculations (include a note or table in the summary section showing the total Impervious and Pervious surface areas for the ENTIRE SITE)
  2. Basin Maps (Pre & Post Development)
  3. Grading Plan
  4. BMP Structures & Details

Inlet Design:

Inlets shall be placed to limit runoff spread into the road as follows: local streets and cul-de-sacs shall be designed so that one clear 8.0’ travel lane is maintained during the 10-year storm; arterials and collectors shall be designed so that runoff does not reduce the clear travel lane to less than 8.0’ for any lane. Inlets in a sump condition shall be designed to prevent overtopping of the curb during the 100-year storm with all upstream inlets completely clogged.

Methodology:

Inlet design for projects where the entire drainage basin is less than 50 acres may use the Rational Method to determine the peak discharge. Projects where the entire drainage basin is greater than 50 acres must use a rainfall to runoff analysis and develop a hydrograph to determine the peak discharge. CBU uses HEC-HMS to perform rainfall/runoff analysis, and submitted calculations must be reproducible on this software.

Storm Sewer Profiles

Construction plan submittals are required to include storm sewer profiles. We suggest omitting the storm sewer structure data table to avoid confusion. Include all applicable data: structure type, casting type, length, slope, inverts, top of casting, pipe material, stationing, utility crossings, proposed grade line, and existing grade line on the profiles.

Operation & Maintenance Manual / Facility Operation & Maintenance Plan:

Submit the appropriate documentation for review for all BMP devices, structures, ponds, or facilities installed as part of the development. Upon approval, a signed copy must be submitted to CBU with the Owner/Developer’s signature. The manual is to include:

  • Title Page with project name, location, date of preparation, and “prepared by” information.
  • The Owner’s Acknowledgement of Maintenance Responsibility complete with their contact name & title, company name (if applicable), mailing address, signature, and date.
  • Development information for pre-construction standards and post-construction maintenance standards for all of the water quality features on the property.
  • List the Water Quality features on site including inspection frequency and associated directions.
  • Include a planting list for all required seeding mixtures.
  • Detail or Exhibit of Outlet Control Structures and their locations.
  • Copy of Inspection form provided to Owner.
  • Right of Entry granted to CBU for inspection of the BMP features as needed.
  • Sample form(s) are available for reference on our website.

Utility Plan Note/Chart - Onsite Pervious/Impervious Area:

Provide the total amount of impervious surface and pervious surface (in acres) within the Notes section on the utility plan sheet. This may be in the form of a sentence or chart (see example below).

Total Impervious Area (in acres) 3.06 acres
Total Pervious Area (in acres) 1.80 acres
Total Site Area (in acres) 4.86 acres

 

RULE 5 / SWPPP:

MS4 – Rule 5 Review:

Any project requiring a Rule 5 review must submit a separate set of plans, application, and review fee to our office. Any questions regarding the requirements outlined below should be directed to the MS4 Coordinator at (812)349-3656 or Stormwater@bloomington.in.gov.

 

Submission Requirements:

  • When submitting construction plans for Rule 5 projects to CBU for review, please also submit an electronic copy (PDF) of the SWPPP to stormwater@bloomington.in.gov. The requirements for CBU's plan review remain the same; you can find them outlined on this page. For City-owned Rule 5 projects, please copy me when you send the SWPPP to IDEM and the Monroe County SWCD for their review.
  • With your initial SWPPP submission, please also include a copy of the first page of the Rule 5 NOI. This will give me the project information I need to complete the review.
  • Also with your initial SWPPP submission, a review fee of $85 must be submitted to CBU in order for the SWPPP review process to begin. The $85 SWPPP review fee can be found in Title 10.21 of the Bloomington Municipal Code. The payment is ultimately the responsibility of the Project Site Owner. Payments can be made by cash, check, or credit card. Please address checks to 'City of Bloomington Utilities,' and deliver (in-person or mail) to 600 E Miller Drive, Bloomington, IN 47401.

 

LANDSCAPING / EASEMENTS / PLATS:

Easements:

CBU permission to construct sanitary, water, or storm mains is contingent upon the grant of easement covering all public facilities for which approval is sought. This may be in the form of a Blanket Easement that covers all of the parcel(s) on which the facilities are located, or specific easements over and along those facilities. This shall include any facilities to be built on said parcel(s) in the future that extend beyond the initial phase of the development. The easements must be signed, recorded, and submitted to CBU before construction of said facilities commences. The following must be submitted to Project Coordinator – Land Acquisitions of the Utilities Engineering staff along with the blanket easement:

  • Copy of the deed(s) for the parcel(s) on which the facilities are located
  • Plan showing the public facilities and the parcel(s) covered by the blanket easement
  • Signed and recorded easement document drafted in accordance with a format provided by the Project Coordinator - Land Acquisitions (812-349-3628).

Private Infrastructure Crossing Multiple Parcels:

If a private service line, sewer lateral, or drainage feature crosses multiple parcels that are currently, or will be, owned by more than one property owner, an easement will be required to cover those utilities. Contact our Project Coordinator – Land Acquisition at (812)349-3628 for further details.

Landscaping:

Please check the landscaping plan to verify that no tree or shrub is indicated within ten feet of any sanitary, storm, or water main to be taken over by CBU. Please incorporate a copy of the Landscaping Plan into the plan set showing the existing and proposed utilities, as well as, existing and proposed easements.

Structures:

No permanent structure shall be located within ten feet of any sanitary, storm, or water main owned or to be taken over by CBU. Please be sure to review your proposed utilities with the proposed easements. Remember that "trees and structures including, but not limited to, buildings, fences, retaining walls, signs, and light fixtures, shall not be located within the Sanitary and Waterline Easements".

Final Plat:

For all developments that require the submission or revision of a plat, please submit a RECORDED copy of the Final Plat to Utilities Engineering Staff for our records.