Engineering Design Manual - Loudoun Water

Chapter 5: Wastewater Collection
disturbance to the surrounding structure(s). Adequate easement must be provided so
that future excavation and maintenance is feasible.
9. Show all crossing utilities and specify required clearances for all pipes. Crossings shown
in profile must account for pipe wall thicknesses and be labeled with designed clearances,
not required clearances.
C. Easement
1. Provide easements which are a minimum of:
Location
Minimum Width (feet)
within limits of pavement 10
traversing unpaved portions of lots 15
undeveloped areas 25
along lot lines of subdivisions or between structures 30
Table 5.5 – Easement Widths
Easement requirements for gravity sewers larger than 12-inch diameter will be specified
on a project-specific basis.
2. Provide vehicular access to easement from street, including drop curb where applicable,
and grade easement to allow vehicular traverse, with slopes not to exceed 8 percent.
Access shall be to all manholes Road shall be at least 10 feet wide and paved, graveled, or
stabilized with an engineered product for all weather access by maintenance vehicles.
This requirement may be reduced in environmentally sensitive areas.
3. Easements shall be conveyed according to the Appendix C of this Manual.
D. Miscellaneous
1. Show sanitary sewer crossings on all applicable profiles of other utilities.
2. Facilities being decommissioned shall be abandoned and associated easements vacated.
Manholes, structures, and appurtenances are to be removed to the depth specified by
Loudoun Water. Removal of pipe may be required. Under circumstances where reexcavation
is deemed impractical, such as below existing roadways, Loudoun Water may
approve abandonment by means of grouting in place.
Engineering Design Manual
September 2010 59