B08_Hurricane_Ridge_Water_Rehab_Photos_attachment.pdf

Rehabilitate Hurricane Ridge Water System OLYM – PMIS No. 306966 & 307067

Figure 1. Rosemount flow meter, chlorine solution tank and chemical feed pump in treatment building.

Figure 2. Looking west toward main parking lot and water line route from water storage tank.

Figure 3. Communications signal box located at west end of main parking lot intersects and bisects the original (1950) direct-bury 600V signal cable and provides a termination point for new (2010) 1-¼” Sch.

40 conduit with signal cable from well pump VFD, which connects to original 600V signal cable that extends to tank.

Figure 4. Signal cable schedule for communications signal box wiring, written inside signal box cover.

New Float Signal Cable in Conduit

Old 600V Signal Cable

Figure 5. View of original water storage reservoir access hatches, looking southwest.

Figure 6. View of tank fill line entering vault (from upper left) and splitting to fill south chamber (left) and north chamber (right) of 100,000-gallon in-ground reinforced concrete water storage reservoir.

Figure 7. Contents of valve vault located on west edge of south chamber.

Distribution Line Distribution from South Chamber

Distribution from North Chamber

Drain from North Chamber

Drain from South Chamber

Drain to Atmosphere

Tank Overflow to Drain Pipe

Obsolete Tank

Figure 8. Electrical junction box for well pump float control signal wire in valve vault. Note that only one float is wired into the well pump VFD located in the treatment building. This on/off float is connected by the orange wire nuts and is the highest float on the float tree located inside the south chamber.

Figure 9. Valve vault showing overflow pipe from each chamber connecting to drain pipe.

Figure 10. Atmospheric venting of valve vault chamber overflow and drain piping, to be screened.

Figure 11. Atmospheric discharge point of water storage tank overflow and drain line, screened.

Overflow & Drain Pipe Discharge Point

Water Storage Tank Access

Hatches

Figure 12. New (2023) aluminum access hatch on south chamber access portal.

Figure 13. New (2023) aluminum access hatch on north chamber access portal.

Figure 14. South chamber of water storage tank with penetrations below access hatch, looking west.

Distribution from South Chamber Drain from

South Chamber

Overflow from South Chamber

Well Pump Float Controls

Figure 15. South chamber of water storage tank, looking south.

Figure 16. South chamber of water storage tank, looking north.

Figure 17. Efflorescence in tank roof of south chamber, looking west (note float tree in lower left).

Figure 18. Efflorescence in tank roof and corroded pipe penetrations in south chamber, looking west.

Original & Current Tank Fill into

South Chamber

Overflow Connection between South & North Chambers

Figure 19. Efflorescence in tank roof and corroded pipe penetrations in north chamber, looking west.

Figure 20. Cracking & previous crack/joint black mastic sealing efforts along west wall of north chamber.

Original & Current Tank Fill into

North Chamber

Overflow Connection between South & North Chambers

Figure 21. North chamber of water storage tank with penetrations below access hatch, looking west.

Distribution from North Chamber

Drain from North Chamber

Overflow from North Chamber

Figure 22. Vicinity map showing location and impact of two obsolete intake dams on Idaho Springs.

~300 sq ft area of inundation + wetland or ~20 ft stream @ Upper Intake Dam

~970 sq ft area of inundation + wetland or ~55 ft stream @ Lower Intake Dam

Surface Water Pump House

Figure 23. Original (upper) intake dam as-built construction drawings.

Figure 24. Current photo of upper intake dam backfilled with sand & gravel for filtration of surface water.

Figure 25. Upper intake dam with shallow weir located above intake gallery and drain pipe.

Figure 26. Looking downstream from upper intake dam impoundment to obsolete pump house.

Figure 27. Obsolete valve key stand, surface water pump house, & electrical transformer for demolition.

Figure 28. Interior of obsolete pump house, main level, looking south.

Figure 29. Interior of obsolete pump house, main level, looking east.

Figure 30. Interior of obsolete pump house, main level, looking west.

Figure 31. Equipment modifications located inside transformer vault addition to pump house.

Figure 32. Looking upstream along natural spring channel from valve key ladder to upper intake dam.

Figure 33. Newer (lower) intake dam constructed in 1985 with electrically controlled submersible pumps to supply original pump house.

Figure 34. Photo of impoundment and wetland vegetation behind lower intake dam.

Figure 35. Stream erosion undermining foundation of lower intake dam.

Figure 36. Electrical control panel, submersible pumps, and hand wheel gate valve at lower intake dam.

Figure 37. Rough sketch showing current configuration of primary (red) and secondary (black) electrical power from main parking lot to junction box (321780) and transformers feeding current groundwater treatment building (321783) and obsolete surface water pump house (14989). Note that actual alignment relative to Google Earth satellite image is not fully accurate.

Figure 38. J-box 321780 and transformer 321783, located at entrance to water treatment access road.

Figure 39. Inside J-box 321780, from left to right:

1. An unused, unenergized wire coming from J-box 318880 (location not relevant)

2. The primary feed to the transformer (321783) right next to the j-box which feeds the new well and pump house

3. The primary feed to the transformer by the obsolete pump house

4. The primary feed from the j-box at the far eastern end of the main parking lot

Figure 40. Close-up of the metal tag on the primary feed to the transformer by obsolete pump house.

Figure 41. Inside transformer 321783, primary feed from j-box on the left, secondary feed to the new pump house on the right.

Figure 42. Inside the transformer by the obsolete pump house (14989); just one primary cable so we know it can be lifted at the other end and safely demolished.

Figure 43. Exterior shot of transformer by the old pump house (14989).

Figure 44. Two occupied and one vacant 3” electrical conduit entering temporary utility building from X- UGB2 electrical vault shown on electrical sheet drawings.

Figure 45. Vacant 3” electrical conduit stubbed up next to electrical panel in temporary utility building.