1-844-Our-LCUB

Customer Portal
Outage Center
LCUB Going The Extra Mile Logo

Wastewater Design Criteria

Design Criteria

The requirements below are critical items required by Tennessee Department of Environment and Conservation (TDEC) and the Rules, Regulations, Rates, and Policies of LCUB’s Water Department. The engineer must ensure all requirements are met. LCUB strongly recommends a pre-design conference to review the development layout, including topography and sewer features, to ensure a successful project.

TDEC Requirements

  1. All plans must be approximately 24″ x 36″
  2. Plans must include a location map.
  3. The plans shall show the location, size, and direction of flow of all proposed and existing sewers draining to the concerned treatment facility.
  4. Plans must be stamped and signed by a licensed engineer.
  5. Hydraulic calculations are required for all lines in the project. All receiving lines must be shown to be adequate for the proposed project and must appear either on the plans or in the supplementary report using the TDEC format (TDEC Design Criteria for Sewage Works Item 2.1.5 / Appendix 2-B).
  6. Topography and elevations, both existing and any changes proposed, and all bodies of water (including the direction of flow and high water elevations) should be clearly shown.
  7. Profiles for sewer detail should have a horizontal scale of not more than 50 feet to 1 inch (LCUB’s requirement is more restrictive than TDEC) and a vertical scale of not more than 10 feet to 1 inch. Plan views should be drawn to a corresponding horizontal scale.
  8. Plans and profiles should show:
    1. Locations of streets and sewers.
    2. Sewer Details – Lines of ground surface, pipe type and size, manhole stationing, invert and surface elevation at each manhole, and grade of sewer between adjacent manholes. Manholes should be labeled on the plan and also on the profile correspondingly. Manhole to manhole maximum should be less than 350 feet.
    3. When there is any question of the sewer being sufficiently deep to serve any residence or other source, the elevation and location of the basement floor or other low point source shall be plotted on the profile of the server which is to serve the house or source in question.
    4. Locations of all special features, such as inverted siphons, concrete encasements, elevated sewers, and flow monitoring key manholes.
    5. Location of all existing structures below and above ground which might interfere with the proposed construction; particularly water mains, gas mains, storm drains, etc.
    6. Detailed drawings of all stream crossings with elevations of the stream bed and or normal and extreme high and low water levels to include 25- and 100-year flood plain (see TDEC 2.4.3 Sewers in Relations to Streams).
    7. Detailed drawings of special sewer joints, cross sections, and appurtenances such as manholes, flush valves, inspection chambers, etc.
    8. Location of adjacent streams and the extent of streamside vegetation.
    9. General topography, including trees within 25 feet of center lines, of the proposed sewer main.

LCUB Requirements

LCUB requires the following items, in addition to the list above:

1. The first page of the plans must include the following:

    1. The developer’s name, address, and phone number.
    2. The property owner’s name, address, and phone number.
    3. The engineer’s name, address, and phone number.
    4. Servicing utility’s name, address, and phone number (LCUB, 7698 Creekwood Park Blvd., Lenoir City, TN 37772, 1-844-687-5282).
2. The items below must be included in the plans:
    1. Profiles must be on the same sheet as the plan and oriented in the same direction.
    2. Overall project and project layout map with project name and design date.
    3. Rights of way and easements needed for the water that falls inside / outside of the property.
    4. Lot lines and locations shown on all plan views, including lot numbers.
    5. Street names, edge of pavement locations, and the appropriate rights of way.
    6. Location and size of services including the distance upstream from downstream manhole and length of 6 inch lateral and depth of the lateral needed at the end of the lateral to serve the lot.
    7. Inverts for the manholes including inlet inverts and outlet inverts, rather than a single manhole, and the centerline invert. The outlet invert should be a minimum of 0.1 feet lower than the invert.
    8. Manhole deflection angles.
    9. A 100 foot stationing of sewer lines and stationing of all appurtenances on plan and included profile views.
    10. Project name, date, scale, north arrow, and sheets numbers on all pages.
    11. Inclusion of all LCUB detail sheets.

3. Revisions tabulated on resubmissions.

4. Inclusion of all benchmarks. All plans must include the establishment of a minimum of one benchmark for each project. Benchmark and its elevation are to be shown on the plan set. Benchmark must be maintained through the completion of the project.

5. The developer (owner) and / or contractor must adhere to LCUB Standard Specifications and Details,

6. The engineer shall provide documentation of the existing and new sewer collections system’s Hydraulic Analysis.

7. The Sewer Collection System must be a minimum of 8 inch diameter. Gravity sewers 12 inches or less in diameter shall be either ductile iron pipe or PVC (SDR 35). Ductile iron pipe shall be used for trench depths of 12 feet or greater and roadways (No Exceptions). Gravity sewers greater than 12 inches in diameter shall be Class 150 ductile iron pipe.

8. Upon review of the plans, LCUB has the right to require the Sewer Collection System to be a larger diameter pipe size or ductile iron pipe in lieu of 8 inch based on the hydraulic analysis, depth, soil, and future conditions.

9. The developer (owner) and / or contractor is responsible for any existing sewer collection system improvements required to provide hydraulic sewer capacity to the new development and maintain the existing / future hydraulic sewer capacity.

10. The developer (owner) and / or contractor is responsible for installing all 6 inch sewer taps, 6 inch sewer lines, and 6 inch 2-way cleanout (Plastic Trends G1006) per LCUB Standards and Specifications for the new development.

11. The Sewer Lateral Discharge (Main Floor Elevation) must be a minimum of 6 inches above the top of the lowest of the two adjacent manholes.

12. The developer (owner) and / or contractor is responsible for installing a minimum of SDR 35 pipe for sanitary sewer services to a depth of 12 feet. Any sanitary sewer services that are over 12 feet deep shall require water line and / or mechanical joint quality pipe.

13. A Low Pressure Sewer System will not be approved for acceptable sewer service

General Sewer Notes

The following notes must appear on plans:

  1. ALL WORK TO BE PERFORMED WILL BE IN ACCORDANCE WITH THE LENOIR CITY UTILITIES BOARD WATER AND WASTEWATER DEPARTMENT (CURRENT EDITION) SPECIFICATIONS ANO DETAILS.
  2. A PRE-CONSTRUCTION CONFERENCE SHALL BE CONDUCTED WITH LCUB REPRESENTATIVES, DESIGN ENGINEER, AND UTILITY CONTRACTOR PRIOR TO ANY UTILITIES CONSTRUCTION ACTIVITIES BEGINNING.
  3. WASTEWATER LINE MATERIALS, INSTALLATION SHALL 8£ IN ACCORDANCE WITH LCUB WATER ANO WASTEWATER DEPARTMENT STANDARDS (CURRENT EDITION).
  4. ALL SERVICE LATERALS SHALL BE 6″ DIAMETER FROM MAIN TO PROPERTY LINE AND INSTALLED AT MINIMUM 1% SLOPE UNLESS FIELD VERIFIED BY THE ENGINEER. A 6″x4″ INCREASER BUSHING -ECCENTRIC (PART NUMBER 32642) SHALL BE USED FOR SINGLE FAMILY RESIDENTIAL CONNECTION.
  5. SERVICE LATERAL CLEANOUT SHALL BE A 2-WAY CLEANOUT AS MANUFACTURED BY PLASTIC TRENDS (G 1006) AND EXTEND 3 FEET ABOVE FINISHED GRADE TO MARK SEWER SERVICE LOCATION UNTIL BUILDING CONNECTION IS MADE.
  6. WASTEWATER LATERAL DISCHARGE (MAIN FLOOR ELEVATION) SHALL BE A MINIMUM OF 6″ ABOVE THE TOP OF THE LOWEST OF THE TWO ADJACENT MANHOLES.
  7. ALL LOW PRESSURE WASTEWATER GRINDER PUMPS/BASEMENT PUMPS SHALL BE PRIVATE ANO WILL NOT BE OWNED NOR MAINTAINED BY LCUB.
  8. ALL WASTEWATER PUMP STATIONS REQUIRED AND PRE -APPROVED BY LCUB SHALL BE SUBMERSIBLE FLYGT PUMP STATIONS.
  9. ALL CONSTRUCTION AND TESTING ACTIVITIES MUST BE OBSERVED BY A RESIDENT PROJECT REPRESENTATIVE (RPR) AS DESIGNATED BY LCUB. WORK PERFORMED WITHOUT DESIGNATED RPR OVERSIGHT AND APPROVAL SHALL NOT BE ACCEPTED BY LCUB.
  10. ALL COSTS INCURRED BY LCUB FOR PROJECT-RELATED RPR ANd GENERAL ENGINEERING SERVICES DURING CONSTRUCTION SHALL BE REIMBURSED BY THE PROPERTY OWNER/DEVELOPER.
  11. ALL PROJECT CLOSEOUT DOCUMENTS MUST BE PROVIDED BY THE OWNER/DEVELOPER PRIOR TO LCUB ACCEPTING OWNERSHIP OF NEW FACILITIES AS FOLLOWS:
      1. RECORD DRAWINGS
      2. RPR DAILY REPORTS
      3. CONSTRUCTION PHOTOS
      4. RPR TESTING REPORTS
      5. CCTV FOR NEW GRAVITY WASTEWAER MAINS
      6. VERIFIED GIS DATA COLLECTED BY LCUB-­APPROVED STAFF
      7. ASSOCIATED EASEMENT DOCUMENTS
  1. LCUB RESERVES THE RIGHT TO REQUIRE INFRASTRUCTURE REPLACEMENT, LARGER DIAMETER PIPE SIZE, PIPE MATERIAL UPGRADE, AND/OR REALIGNMENT BASED ON ANALYSIS, DEPTH, SOIL, AGE, OR FUTURE CONDITIONS OF PARCEL/PROPERTY DUE TO AREA DISTURBANCE OR SITE CONSTRUCTION, BUILDING, PAVING, ETC., PARCEL OWNER/DEVELOPER SHALL BE RESPONSIBLE FOR ALL ASSOCIATED COSTS RELATED TO DESIGN OR WORK PERFORMED.
  2. BLASTING NOT PERMITTED.
  3. ASSOCIATED WASTEWATER FEES FOR DEVELOPMENT PROJECTS SHALL INCLUDE, BUT NOT LIMITED TO, TAPS, CAPITAL RESERVE, SPECIAL ASSESSMENT, ETC., AND SHALL BE BILLED AT THE ENO OF EACH PROJECT PHASE AND PAYMENT SHALL BE DUE FROM DEVELOPER AT THAT TIME. WASTEWATER SERVICE SHALL NOT BE MADE LIVE UNTIL PAYMENT IS RECEIVED IN FULL.
  4. DEVELOPER (OWNER) AND/OR CONTRACTOR SHALL BE RESPONSIBLE FOR ANY EXISTING SEWER COLLECTION SYSTEM IMPROVEMENTS REQUIRED TO PROVIDE HYDRAULIC SEWER CAPACITY TO THE NEW DEVELOPMENT AND MAINTAIN EXISTING/FUTURE HYDRAULIC SEWER CAPACITY.
  5. LOW PRESSURE SEWER SYSTEMS SHALL ONLY BE APPROVED IN CERTAIN AREAS OF THE LCUB SEWER COLLECTION SYSTEM AND UNDER SPECIAL CIRCUMSTANCES. LCUB DESIRES TO UTILIZE GRAVITY SEWER WHERE FEASIBLE AND SHALL NOT OWN NOR MAINTAIN INDIVIDUAL GRINDER PUMPS OR PRIVATE LOW PRESSURE SEWER SERVICE LINES.
  6. DEVELOPER (OWNER) AND/OR CONTRACTOR SHALL BE RESPONSIBLE FOR INSTALLING MINIMUM SDR 35 PIPE FOR SANITARY SEWER SERVICES TO DEPTH OF 12 FEET. ANY SANITARY SEWER SERVICES WHICH ARE OVER 12 FEET DEPTH SHALL REQUIRE WATER LINE AND/OR MECHANICAL JOINT QUALITY PIPE.
  7. DEVELOPER (OWNER) AND/OR CONTRACTOR SHALL BE RESPONSIBLE FOR INSTALLING ALL 6-INCH SEWER TAPS, 6- INCH SERVICE LINES, AND 6-INCH 2-WAY CLEANOUT PER LCUB STANDARD SPECIFICATIONS FOR THE NEW DEVELOPMENT.
  8. RIGHT-OF-WAYS AND EASEMENTS NEEDED FOR THE SEWER LINE THAT FALLS INSIDE/OUTSIDE OF THE PROPERTY SHALL BE SIGNED Ad FURNISHED PRIOR TO START OF PROJECT.
  9. CONTRACTOR SHALL FIELD VERIFY AND POTHOLE ALL UTILITIES AS INDICATED BY DRAWING, GIS, TENNESSEE ONECALL, ETC.
  10. ALL CONTRACTORS SHALL BE LICENSED CONTRACTORS WITH “MU” CLASSIFICATION IN THE STATE OF TENNESSEE AS REQUIRED BY THE CONTRACTOR’S LICENSING ACT OF 1994 AND RELATED AMENDMENTS THERETO. LCUB MAY REQUIRE ADDITIONAL REQUIREMENTS AND CERTIFICATIONS AS NECESSARY.
  11. DEVELOPMENT PHASING SHALL BE APPROVED ONLY BEFORE P. E., LCUB, AND TDEC STAMPS ARE APPLIED AT THE BEGINNING OF THE PROJECT. NO RE -PHASING WILL BE ALLOWED OR APPROVED AFTER CONSTRUCTION OF A PROJECT HAS BEGUN.
  12. UTILITY INFRASTRUCTURE SHALL MEET LCUB STANDARD SPECIFICATIONS TO POINT OF SERVICE LOCATION DESIGNATED BY LCUB. INFRASTRUCTURE LOCATED ON PRIVATE SIDE OF POINT OF SERVICE SHALL MEET ALL LOCAL ANO/OR TENNESSEE DEPARTMENT OF ENVIRONMENT AND CONSERVATION DESIGN CRITERIA/STANDARD SPECIFICATIONS.
  13. ALL PIPING UNDER ROADWAYS, DRIVEWAYS, SIDEWALKS, PARKING LOTS, ANO OTHER PAVED AREAS SHALL BE CLASS 350 DUCTILE IRON PIPE WITH PROTECTO 401 LINING.

You can download all waterwater general notes by clicking here.