Chapter 15.45
SEWER LINES
Sections:
15.45.030 Sewer main bedding materials.
15.45.040 Sewer connection fees.
15.45.060 Connecting to existing sewers.
15.45.100 Sewer lift stations.
15.45.110 Discharging waste from cesspools and septic tanks at sewage treatment plant.
15.45.010 General.
The installation specifications for sewer systems shall conform to the APWA Standard Specifications unless noted otherwise in this chapter. [Ord. O-09-2024 § 2 (Exh. A); Ord. O-13-2015 § 1 (Exh. A); Ord. O-03-2010 § 1 (Exh. A § 9.010)].
15.45.020 Sewer pipe.
PVC piping shall be used with Eagle Mountain City under the specifications and conditions in the respective pipe sections. Any other material requested to be used will need approval by city engineer or designee. Sanitary sewer shall be located on the south or west side of the street, five feet from the centerline. Water mains shall be minimum 18 inches vertical above the sewer. Separation between water and sewer mains shall be 10 feet (horizontally) minimum unless authorized in writing by the city engineer or his/her designee. Maximum spacing of sewer manholes shall not exceed 400 feet.
Sewer mains shall be owned and maintained by the city and includes all mainlines and manholes. Laterals extending from the home and connecting to the mainline are private and are the responsibility of the homeowner to maintain or correct failures should they occur regardless of the location relative to the right-of-way. [Ord. O-26-2024 § 2 (Exh. A); Ord. O-09-2024 § 2 (Exh. A); Ord. O-13-2015 § 1 (Exh. A); Ord. O-03-2010 § 1 (Exh. A § 9.020)].
15.45.030 Sewer main bedding materials.
Pipe bedding for sewer mains shall consist of three-quarter-inch or pea gravel, and shall extend six inches below and to the sides of the sewer main, and 12 inches above crown of pipe, or one pipe diameter, whichever is larger. [Ord. O-09-2024 § 2 (Exh. A); Ord. O-13-2015 § 1 (Exh. A); Ord. O-03-2010 § 1 (Exh. A § 9.025)].
15.45.040 Sewer connection fees.
A. Sewer Connection Fee. The schedule of charges to be imposed for sewer connections shall be set by the city council from time to time by resolution.
B. Reimbursement of Sewer Main Line Assessment Charges. When a main line or trunk line has been installed at the expense of some third party other than the owner of adjacent property to the street or easement in which a main or trunk line has been extended, is connected to by the adjacent property developer and an assessment is made against the property benefited by the main line, the third party who advanced the cost of installing the main or trunk line shall be entitled to reimbursement for that portion of the expenses incurred by him which is actual cost of extension with a maximum reimbursement not to exceed the actual cost incurred by the developer in making the main line extension go past the property of the developer who subsequently connects on the main or trunk line. Extension reimbursements shall not be paid after the expiration of 10 years from the original date of installation of the main or trunk line.
Third party other than owner of adjacent property to the street or easement, in which a main or trunk line has been extended, shall file a report of actual cost of such main line extension with Eagle Mountain City. The report shall be the basis for assessment made against the property benefited by main line extension.
Before any sewer connection request by adjacent property is approved, such assessment made against the property shall be paid to Eagle Mountain City. Such payment shall be made to the party entitled to such payment by Eagle Mountain City. A fee in the amount established by the city will be collected by Eagle Mountain City for the administration of the fund transfer.
In no event shall the right of reimbursement exceed the amount of actual cost of extension. [Ord. O-09-2024 § 2 (Exh. A); Ord. O-13-2015 § 1 (Exh. A); Ord. O-03-2010 § 1 (Exh. A § 9.030)].
15.45.050 Manhole bases.
Manhole bases shall be constructed of concrete to the dimensions shown on the drawings. Main line sewer pipe and projecting ends of the sewer and pipe stubs shall be adequately supported to prevent displacement from line or grade during installation of the base. All manholes shall have the invert shape as indicated on the standard details to provide an adequate channel between the inlet and outlet pipes. The entire surface of the manhole invert, including channels and shelves, shall be steel-toweled to a smooth dense surface. All inverts of junction manholes shall be shaped while the bases of the manholes are under construction. All inverts shall follow the grades of the pipe entering the manholes. Manholes shall have a two-tenth-foot fall through manhole. Rubber boots shall be provided to connect the inlet and outlet pipes and provide watertight joints. Manholes with more than two pipes entering/leaving or where the flow-through angle of the two is less than 90 degrees shall require a 60-inch manhole. In no circumstance shall more than five pipes be allowed to enter/leave a manhole including lateral lines. [Ord. O-09-2024 § 2 (Exh. A); Ord. O-13-2015 § 1 (Exh. A); Ord. O-03-2010 § 1 (Exh. A § 9.050)].
15.45.060 Connecting to existing sewers.
Manholes used to connect the sewer to the existing sewer shall be plumb and centered on the existing sewer. The new pipe shall be placed against the existing pipe at the elevation designated by the engineer and the base poured as specified above. Care shall be taken not to disturb the alignment of the existing sewer during the excavation procedure. Any damage to the existing sewer shall be repaired. When connecting to existing manhole or stub pipe a test ball shall remain inflated in the downstream pipe to prevent contamination of existing mains. [Ord. O-09-2024 § 2 (Exh. A); Ord. O-13-2015 § 1 (Exh. A); Ord. O-03-2010 § 1 (Exh. A § 9.060)].
15.45.070 Sewer laterals.
Service lines shall be constructed of substantial materials approved by the Utah Plumbing Code for the particular application. Minimum pipe size shall be four-inch diameter. Sewer lateral cleanouts may not be placed under any permanent structures, including porches or bay windows. Any cleanouts exposed to vehicular traffic shall have traffic rated triangular covers.
All sewer laterals shall be connected to a wye connection. Any other material or method requested to be used will need approval by city engineer or designee. Sewer laterals to extend 12 feet beyond property line and marked with a two-inch by four-inch board at the end and a two-inch “S” stamped on the face of the curb and gutter. Any bend in a service line between the main line and the property line greater than 22.5 degrees needs to have a cleanout. No 90-degree bends are allowed. No laterals will be allowed to connect to manholes. The minimum cover of sewer laterals is three feet six inches at the property line. [Ord. O-26-2024 § 2 (Exh. A); Ord. O-09-2024 § 2 (Exh. A); Ord. O-13-2015 § 1 (Exh. A); Ord. O-03-2010 § 1 (Exh. A § 9.070)].
15.45.080 Minimum slopes.
Slopes shall be designed to have a two-foot-per-second velocity unless otherwise approved by the city engineer. Slope shown on construction drawings shall be calculated based on the length of pipe from the edge of manhole to the edge of the next manhole. Minimum slopes for different size pipes are as follows:
|
Pipe Diameter |
Minimum Slope |
|---|---|
|
4 inches |
2% |
|
6 inches |
1% |
|
8 inches |
0.334% |
|
10 inches |
0.248% |
|
12 inches |
0.194% |
|
14 inches |
0.158% |
|
15 inches |
0.144% |
|
16 inches |
0.132% |
|
18 inches |
0.113% |
|
21 inches |
0.092% |
|
24 inches |
0.077% |
|
27 inches |
0.066% |
|
30 inches |
0.057% |
|
36 inches |
0.045% |
[Ord. O-09-2024 § 2 (Exh. A); Ord. O-13-2015 § 1 (Exh. A); Ord. O-03-2010 § 1 (Exh. A § 9.080)].
15.45.090 Cleaning.
After the sewer lines have been laid and the trench backfilled, they shall be thoroughly cleaned and tested for leakage and alignment in the presence of the city engineer or his/her designee before acceptance by the owner. Cleaning shall be done using a high pressure jet cleaning machine, producing a minimum of 800 psi. Wastewater and debris shall not be permitted to enter sewer lines in service, but shall be removed by a “sucker truck” at the lowest manhole of the extension. Such cleaning shall be done by private crews at the expense of the owner.
A. Displacement Test. The displacement test shall be conducted by the developer and inspector in the presence of the engineer and shall consist of the following: all sewer mains shall be washed and inspected using a television inspection unit. The televised inspection of any mains which reveals broken, misaligned or displaced pipe, or other defects, as designated by the city engineer or his/her designee, shall be remedied by the contractor. The televised inspection shall have the slope of pipe shown on tape throughout the inspection. After cleaning and inspection have been completed, the line shall be tested for leakage as specified in subsection B of this section.
B. Leakage Tests. The low pressure air test shall be conducted by the following method under the direction of the city engineer or his/her designee with equipment equal to Cherne Industrial, Inc.
All wyes, tees, or ends of lateral stubs shall be suitably capped and braced to withstand the internal test pressures. Caps shall be easily removable for future lateral connections or extensions. After a manhole to manhole section of line has been backfilled and cleaned, it shall be plugged at each manhole with pneumatic plugs.
Low pressure air shall be introduced into the sealed line until the internal air pressure reaches four psig greater than the average back-pressure of any ground water that may be over the pipe. At least two minutes shall be allowed for the air pressure to stabilize.
The portion of line being tested shall be accepted if the portion under test does not lose air at a rate greater than three-thousandths cubic feet per minute per square foot of internal pipe surface or two cubic feet per minute minimum when tested at an average three psig greater than any back-pressure exerted by ground water that may be over the pipe at the time of the test.
The pipe and joints shall also be considered acceptable when the time required in minutes for pressure to decrease from three and one-half to two and one-half psig (greater than the average back-pressure of any ground water that may be over the pipe) shall not be less than the time shown for the given diameters in the following table:
|
Pipe Diameter in Inches |
Minutes |
|---|---|
|
4 |
2.0 |
|
6 |
3.0 |
|
8 |
4.0 |
|
10 |
5.0 |
|
12 |
5.5 |
|
15 |
7.5 |
|
18 |
8.5 |
|
21 |
10.0 |
|
24 |
11.5 |
If the installation fails to meet this requirement, the contractor shall determine at his/her own expense the source of leakage. He/she shall repair or replace all defective materials and/or workmanship. All sewer mains shall be tested, cleaned and accepted by Eagle Mountain City before laying the street surface. [Ord. O-09-2024 § 2 (Exh. A); Ord. O-13-2015 § 1 (Exh. A); Ord. O-03-2010 § 1 (Exh. A § 9.090)].
15.45.100 Sewer lift stations.
Sewer lift stations that are required in a development shall be designed by the developer’s engineer according to city standards and the design shall be submitted to the city engineer or his/her designee for review prior to starting construction. Lift stations will be the overwatch type design, will have standby power, telemetry, and will be designed for regional areas, not individual subdivisions. Sewer lift stations will not be allowed if gravity flow can be accommodated. [Ord. O-26-2024 § 2 (Exh. A); Ord. O-09-2024 § 2 (Exh. A); Ord. O-13-2015 § 1 (Exh. A); Ord. O-03-2010 § 1 (Exh. A § 9.100)].
15.45.110 Discharging waste from cesspools and septic tanks at sewage treatment plant.
It shall be unlawful for any person, firm or corporation to discharge the waste material collected and gathered in cleaning cesspools or septic tanks at any place within the corporate limits of the city. Illegal discharges may result in fines up to $2,480. [Ord. O-26-2024 § 2 (Exh. A); Ord. O-09-2024 § 2 (Exh. A)].
15.45.120 Septic systems.
It is unlawful to construct a septic system within the city boundaries except in accordance with Chapter 13.20 EMMC. Septic systems approved in accordance with Chapter 13.20 EMMC must also be approved in writing by the Utah County health department prior to issuance of a building permit. Notwithstanding approval of a septic system in accordance with Chapter 13.20 EMMC, the city may require a property owner to connect to the sewer system at the property owner’s cost and expense if the city determines, in the city’s sole and absolute discretion, that the individual septic system, or the combination of multiple septic systems, is polluting the stormwater or ground water within the city, impairing any culinary or municipal wells located within the city, or violating any existing or future water source protection overlay zones. [Ord. O-09-2024 § 2 (Exh. A)].