1. 1 Topic. II.9. Sewerage Facilities. Manholes and Street Inlets Kinds of Sewerage Facilities §Facilities for the sewer network inspection, maintenance and operation l Manholes l Street inlets l Overflows §Facilities for wastewater quantity and quality regulation l Flow regulation chambers l Retention basins l Inception shafts l Wastewater precipitation units

2. 2 Manholes Manholes Positioning §On every horizontal and vertical turn of the sewer permanent way §On the points of sewer pipes diameter or material change §On the points of sewer branches joining to the receiving collectors §On strait reaches in maximum distances - l max, as follows: l At pipe diameters D < 200 mm  l max = 40 m l At pipe diameters D < 450 mm  l max = 60 m l At pipe diameters D < 600 mm  l max = 80 m l At pipe diameters D < 900 mm  l max = 100 m l At pipe diameters D < 1500 mm  l max = 150 m l At pipe diameters D > 1500 mm  l max = 200 m Manholes kinds §Standard (prefabricated) manholes §Individually designed and constructed manholes

3. 3 Manholes Manholes Cunettes

4. 4 Manholes Standard Prefabricated Reinforced Concrete Manhole

5. 5 Manholes Individually Designed Reinforced Concrete Manholes

6. 6 Manholes Reinforced Concrete Manhole

7. 7 Street Inlets Street Inlets Kinds §At combined sewer system l With catch basin (catch pot) l Without catch basin §At separate sewer system (drainage network) l Without catch basin Street Inlets Positioning §At every sewer manhole §On strait reaches l Maximal distance depending on the street width l Maximal distance depending on the street slope

8. 8 Street Inlets Street Inlets Positioning

9. 9 Street Inlets

10. 10 Street Inlets

11. 11 Street Inlets Street Inlets with Catch Basin

12. 12 Street Inlets Street Inlet without Catch Basin