Site work for a water / sewer project in Cohasset, Minnesota. Completed plans call for site work for a water / sewer project.

Cleaning, Repairing, & Painting; 200,000-Gallon Elevated Reservoir; Tower Number One Site Directions: 600 Riverside Street, Cohasset, MN 55721 Est. Completion Date: Oct. 15, 2025 The project includes the following work on the 200,000-gallon single pedestal reservoir, constructed by Universal Tank & Iron Works, Inc. in 1981. The date of last reconditioning is unknown. 1. Cleaning, sandblasting, and painting all interior and exterior surfaces. Full containment is mandatory. 2. Structure modifications and surface repairs. Tower out-of-service schedule to start on May 5, 2025 and complete by October 15, 2025 so long as the out-of-service duration does not exceed a total of 54 calendar days, which includes unfavorable weather days. Once the tower has been taken out of service, the Contractor must work continuously during that maximum calendar day duration. Structure modifications that do not impact tower operation may begin before the start date and will not count toward the out-of-service duration. The approximate dimensions are as follows; tank diameter of 41-feet, high-water level 150-feet, low-water level of 120-feet, and overall height of 155-feet. Reservoir Information The reservoir is located at 600 Riverside Street, Cohasset, Minnesota 55721. It is a 200,000- gallon single pedestal reservoir, as shown in Appendix A, that was constructed by Universal Tank & Iron Works, Inc. in 1981. Approximate dimensions are as follows: tank diameter of 41- feet, high-water level of 150-feet, low-water level of 120-feet, and an overall height of 155- feet. This project includes the following work. Cleaning, sandblasting, and painting all interior and exterior surfaces. Full containment is mandatory. Miscellaneous structure modifications. Welding and grinding to remove erection bracket scab marks, weld spatter, poor welds, and other surface irregularities. Structure Modifications: Bid Item #1 Photos and drawings referenced are in Appendix A and Appendix B, respectively. Refer to Article 13 of this Section for additional material and product information. 1. Seal weld the following joints. See photos 2 through 7. a. The overlap seam between the dollar plate and roof plates, b. The inside joint between the drywell tube and dollar plate, c. The inside of the dollar plate butt joint, d. The inside joint between the wet access manway and dollar plate, and e. The inside joint where roof plates overlap the upper torus plates. 2. Replace the ladder in the wet area with a new OSHA and AWWA compliant ladder. All connection points, rungs, stand-off brackets, etc. are to be seal welded. Refer to KLM Drawing No. 19. See photos 2, 16, and 20. 3. Install an anchor point on the underside of the roof adjacent to the wet access manway. Include a self-retracting lifeline (SRL) that is accessible from the manway to allow for safe access while ascending and descending the ladder. Refer to KLM Drawing No. 26. See photo 2. 4. Weld an anti-vortex steel plate, 1/4 -inch thick by 2-inch tall, across the center of the overflow discharge opening. See photo 9. 5. Seal weld both sides of the six (6) intermittently welded vertical angles attached to the upper torus. See photos 6, 7, and 11. 6. Seal weld both sides of the intermittently welded, horizontal shell stiffener ring. See photos 11 and 12. 7. Seal weld both sides of the two (2) intermittently welded drywell tube stiffener rings. See photos 18, 19, and 20. 8. Replace the gasket on the 14-inch by 18-inch oval manway in the bowl. See photos 24, 32, and 33. 9. Weld one (1), 1/4 -inch thick by approximately 2-inch tall, steel flat bar on top of the inlet and outlet pipes. See photo 25. 10. Install a submersible mixer in the tower. Include installation of all electrical components and a SCADA compatible control panel for complete operation. Refer to KLM Drawing No. 59. 11. Replace the three (3) incandescent light fixtures in the tower with LED vapor-proof lights. One (1) fixture is at the top of the drywell tube, one (1) fixture is at the top of the pedestal ladder, and one (1) fixture is in the base cone. Include installing one (1) additional LED light fixture at the lower landing. See photos 26, 27, 35, 43, and 48. 12. Weld A36 steel patch plates in the four (4) holes cut near the top of the drywell tube. Seal weld from both the wet and dry sides of the plates. Plate thickness shall match existing drywell tube plate thickness. See photos 27 and 28. 13. Install approximately five (5) half-moon cable brackets, equally spaced, inside the drywell tube. Relocate all cables and conduit attached to the drywell tube ladder to the new brackets. Remove any unused clamps, brackets, etc. Replace conduit and cables as necessary. Refer to KLM Drawing No. 4a. See photos 26 and 29 through 31. 14. Install a 24-inch diameter pressure-style manway in the drywell tube, near the bowl connection. Include installing a step-off bar and hand grabs to access the manway. Refer to KLM Drawing No. 37a and 37c. 15. Remove the ladder from the upper landing to the drywell tube in its entirety. Repair and grind flush all attachment areas. Include installing a new OSHA compliant ladder. The ladder shall be aligned and welded to the bottom of the existing drywell tube ladder and attached to the upper landing with slotted, bolted connections. Rung spacing shall be consistent with existing, which should be 12-inches on-center. Contractor to field verify existing ladder prior to fabrication. Refer to KLM Drawing No. 19. See photos 30, 31, 35, and 36. 16. Install cable-style safety climb devices conforming to OSHA regulations on all interior dry area ladders. This includes replacement of the safety climb system on the pedestal ladder. Refer to KLM Drawing No. 24. See photos 26, 29, 31, 36 through 43, 46, 48, and 49. 17. Replace the existing bowl drain valve with a stainless-steel valve and a clear, rigid, highpressure hose connected to the overflow pipe. Refer to KLM Drawing No. 33. See photo 33. 18. Remove the clean-out plug in the bowl. Repair by inserting an A36 steel plate, same thickness as the bowl plate, in the resulting hole and seal using 100% penetration weldment. Plate overlapping is not permitted. See photos 32 and 33. 19. Replace the expansion joint on both the inlet and outlet pipes located at the upper landing. Use stainless-steel, bellows-style expansion joints for the replacements. See photo 36. 20. Convert the upper landing of the pedestal into a condensate ceiling by seal welding, on the top side, an approximately 2-inch wide by 1/4 "-thick A36 steel plate over the gap between the landing perimeter and the pedestal. Install one (1) 3-inch by 12-inch opening, with curbs, in the landing, and locate it above the new pedestal coax stand-off brackets noted in the following Item. Install a 2-inch diameter drain in the low point of the landing with a connecting line to the overflow pipe. Refer to KLM Drawing No. 5c and 44a. See photos 36 through 38. 21. Install approximately 17 stand-off brackets in the pedestal and base cone at 8-foot maximum spacing. Remove all unused clamps, brackets, etc. and relocate existing electrical conduit and cables from the ladders to the cable brackets. Install new conduit and cables as necessary. Refer to KLM Drawing No. 4b. See photos 38 through 43. 22. Remove and dispose of all insulation on the inlet pipe and outlet pipes to facilitate abrasive blasting and painting of the pipes. Install new insulation and aluminum jacketing to completely cover both pipes from 1-foot below the tower floor elevation to tight to the bowl once coating work is complete. See photos 35 through 48. 23. Install one (1) 3-inch by 12-inch opening, with curbs, in the lower landing, and locate it above the new base cone coax stand-off brackets. Refer to KLM Drawing No. 5c. See photo 46. 24. Install bolted ports in the center of each of the two (2) pedestal landings to accommodate use of a containment system during reconditioning. Refer to KLM Drawing No. 45. See photos 38 and 43. 25. Remove the drainpipe routed from the lower landing to the base cone. Weld a 1/4 -inch thick, A36 steel patch plate over the resulting hole in the landing. Seal weld from both sides. Repair the base cone by fitting an A36 steel plate of same thickness in the resulting hole and using 100% penetration weldment. See photos 46, 49, and 67. 26. Pour a 4-inch thick concrete pad in the base of the tower, flush with the top of the existing ring wall foundation. The concrete slab shall be reinforced with 6 x 6 - W1.4/W1.4 welded wire fabric, graded, float finished flat and level. See photos 48 through 52. 27. Remove the saddle tap from the fill pipe and weld an A36 patch plate, of same thickness as the pipe, over the hole. See photo 52. 28. Install a climb assist on the exterior (roof side) of the drywell tube. Refer to KLM Drawing No. 25. See photos 53 and 54. 29. Install a stop chain on the drywell tube manway lid to prevent it from opening 180 degrees. Refer to KLM Drawing No. 11. See photos 53 through 55. 30. Install two (2), 4-inch diameter unthreaded couplings with weathertight covers in the top of the drywell tube for antenna cable routing. Seal weld the coupling inside and outside. Patch plate over the existing coax penetrations using 1/4 -inch thick A36 steel. Seal weld both sides. See photos 27 and 53 through 55. 31. Replace the existing finial vent with a new 24-inch diameter aluminum pressure pallet vent. Include replacement of the existing collar. The new vent and vent screen design should meet AWWA D100 and Department of Health regulations. Refer to KLM Drawing No. 8a. See photos 53 and 54. 32. Install a gasket on the wet access manway hatch to provide a seal when closed. Modify the hatch hinge to ensure the cover seals to the collar. See photos 53 through 55. 33. Replace the existing roof handrail with a 16-foot diameter, pipe-style handrail conforming to OSHA regulations. Refer to KLM Drawing No. 15h. See photos 53 and 54. 34. Replace the two (2), 2-inch rigging couplings in the roof with the same size unthreaded couplings with weathertight covers. Refer to KLM Drawing No. 12b. See photos 53 and 54. 35. Modify the overflow pipe discharge to ensure a downward, premanufactured, 45-degree bend, of same pipe size to existing, with 12- to 24-inch air gap between the new pipe invert and the splash pad. Install a new screen retainer and corrosion-resistant, heavy-gauge, No. 4, and No. 24 mesh screens (#4 installed downstream of #24). Refer to KLM Drawing No. 53a. See photo 67. 36. Repair any loose or missing grout under the perimeter of the tower base plate with non-shrink grout. After grout repair, caulk around the entire perimeter of the seam between the tower base plate and grout. See photos 64 through 66.