EnTech, Inc. Consulting Engineers Sheridan, Wyoming

Transcription

1 TOWNS OF DAYTON AND RANCHESTER WATER SUPPLY PROJECTS UPDATE PRESENTED BY: EnTech, Inc. Consulting Engineers Sheridan, Wyoming

2 TOWN OF DAYTON PROBLEM AREAS WITH CURRENT WATER SYSTEM EXISTING 10 ASBESTOS CEMENT TRANSMISSION MAIN FROM DAYTON WTP TO TOWN CURRENTLY LOCATED BENEATH AG. RESERVOIR ON IXL RANCH LOW PRESSURE PROBLEMS IN SOUTHEAST PART OF TOWN UNDERSIZED MAINS IN CERTAIN AREAS OF TOWN DON T PROVIDE SUFFICIENT FIRE FLOWS RAW WATER QUALITY FROM TONGUE RIVER HIGHLY VARIABLE (ESPECIALLY TURBIDITY) REQUIRING CONSIDERABLE OPERATIONS TIME DURING SPRING AND AFTER RUNOFF EVENTS MOST AREAS OF SYSTEM MANUALLY OPERATED AND MONITORED

3 TOWN OF DAYTON LEVEL I STUDY COMPLETED IN FALL OF 2000 RECOMMENDATIONS: CONSTRUCT NEW 12 TRANSMISSION PIPELINE FROM WTP TO TOWN CONSTRUCT NEW 8 TRANSMISSION PIPELINE FROM WEST END OF TOWN TO TANK ON SOUTHEAST SIDE OF TOWN CONSTRUCT NEW PUMP STATION NEAR HIGH SCHOOL CONSTRUCT MISCELLANEOUS MAINS IN TOWN LIMITS TO IMPROVE FIRE FLOWS WATER QUALITY AT WTP ANALYZE FURTHER IN LEVEL II STUDY FURTHER EVALUATE COSTS ASSOCIATED WITH SCADA SYSTEM - ANALYZE FURTHER IN LEVEL II STUDY

4 Town of Dayton N PROPOSED NEW PUMP STATION PROPOSED NEW TRANSMISSION PIPELINES EXISTING TRANSMISSION PIPELINE Dayton WTP

5 PIPELINE BENEATH EXISTING IXL RESERVOIR

6 RECOMMENDATIONS: CONSTRUCT NEW INFILTRATION GALLERY BENEATH TONGUE RIVER TO IMPROVE RAW WATER QUALITY INSTALL VARIABLE SPEED DRIVES ON RAW WATER PUMPS TO SMOOTH OUT THROUGH WATER TREATMENT PLANT SCADA SYSTEM INSTALL FIBER OPTIC CABLE IN CONJUNCTION WITH PIPELINES NOW INSTALL SCADA SYSTEM BETWEEN NEW PUMP STATION AND STORAGE TANK NOW INSTALL SCADA SYSTEM BETWEEN WTP AND DISTRIBUTION SYSTEM IN FUTURE INSTALL SCADA SYSTEM WITHIN WTP IN FUTURE TOWN OF DAYTON LEVEL II STUDY COMPLETED IN FALL OF 2001

7 DAYTON WTP WTP EXISTING INFILTRATION GALLERY

8 EXISTING RAW WATER PUMPS IN DAYTON WATER TREATMENT PLANT

9 TOWN OF DAYTON EARLY 2002 DEVELOPMENTS 1. WWDC RECOMMENDS THAT A DEEP (MADISON FORMATION) WELL BE DRILLED AS AN ALTERNATIVE WATER SUPPLY ALTERNATIVE. 2. WWDC REQUESTS THAT DAYTON POSTPONE MOVING FORWARD WITH LEVEL II IMPROVEMENTS (I.E., NEW INFILTRATION GALLERY, VARIABLE SPEED DRIVES ON RAW WATER PUMPS) PENDING RESULTS OF WELL STUDY. 3. WWDC REQUESTS THAT ENTECH STUDY THE FEASIBILITY OF A REGIONAL WATER SYSTEM FOR DAYTON AND RANCHESTER.

10 TONGUE RIVER CANYON MADISON FORMATION

11 TONGUE RIVER CROSSING MADISON FORMATION

12 Town of Dayton N PROPOSED WELL SITE Dayton WTP

13 TOWN OF DAYTON CURRENT PROJECT STATUS 1. DAYTON POSTPONED APPLYING FOR LEVEL II RECOMMENDED IMPROVEMENTS (I.E., NEW INFILTRATION GALLERY, VARIABLE SPEED DRIVES ON RAW WATER PUMPS) PENDING RESULTS OF DEEP WELL STUDY. 2. TRANSMISSION PIPELINE AND PUMP STATION FINAL DESIGN AND CONSTRUCTION ON HOLD PENDING LOCATION OF WELL (IN ORDER TO MAKE SURE THE PIPELINE IS IN THE CORRECT POSITION IF WELL PROVES SUCCESSFUL). 3. TRANSMISSION PIPELINE FINAL DESIGN ON HOLD PENDING DECISION BY IXL RANCH OWNER AS TO BEST LOCATION TO ROUTE PIPELINE THROUGH UPPER PART OF RANCH. 4. ADDITIONAL WORK REQUESTED IN VICINITY OF STEEL STORAGE TANK TO ELIMINATE CURRENT CONDITION OF SOIL BEING PLACED AGAINST TANK WALLS. 5. OTHER LANDOWNER NEGOTIATIONS TAKING PLACE FOR EASEMENT ACQUISITIONS.

14 IXL RANCH HEADQUARTERS

15 TOWN OF DAYTON CURRENT PLAN 1. DRILL WELL COMPLETE BY SPRING OF DETERMINE BEST ALIGNMENT THROUGH IXL RANCH 3. FINAL DESIGN OF PIPELINE PROJECT COMPLETE BY LATE SUMMER 4. CONSTRUCT PIPELINE COMPLETE BY SUMMER OF 2003, CONNECT TO EITHER WTP OR WELL

16 TOWN OF RANCHESTER POTENTIAL PROBLEM AREAS WITH CURRENT WATER SYSTEM RAW WATER QUALITY FROM TONGUE RIVER MAY BE QUESTIONABLE AT TIMES INSTALL PRE-SEDIMENTATION BASIN? RELOCATE INTAKE? NEED FOR MORE SOPHISTICATED TREATMENT (SUCH AS MEMBRANE FILTRATION?) NEED FOR ADDITIONAL DISTRIBUTION STORAGE? NEED FOR EMERGENCY POWER GENERATION?

17 RANCHESTER WTP FIVE MILE CREEK RIVER TONGUE

18 TOWN OF RANCHESTER CURRENT PROJECT STATUS ENTECH PERFORMING LEVEL I STUDY FOR WWDC, TO BE COMPLETED IN FALL OF 2002.

19 RANCHESTER WATER TREATMENT PLANT INTAKE

20 TONGUE RIVER FIVE MILE CK.

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22 RESULTS OF DAYTON-RANCHESTER REGIONALIZATION STUDY RANKING OF MOST COST-EFFECTIVE ALTERNATIVES 1. DAYTON AND RANCHESTER PARTICIPATE IN A REGIONAL PROJECT CONSISTING OF A DEEP GROUNDWATER WELL AND TRANSMISSION PIPELINE 2. DAYTON AND RANCHESTER UPGRADE THEIR OWN WATER TREATMENT PLANTS AND CONTINUE TO OPERATE INDEPENDENTLY DEPENDS UPON RESULTS OF WELL PROJECT 3. DAYTON AND RANCHESTER PARTICIPATE IN A REGIONAL PROJECT CONSISTING OF A WATER TREATMENT PLANT (LOCATED IN THE VICINITY OF DAYTON S EXISTING WTP) AND TRANSMISSION PIPELINE WWDC HAS ALLOWED RANCHESTER LEVEL I STUDY TO PROCEED DESPITE RESULTS NOT BEING IN ON WELL PROJECT.

23 RANCHESTER PROPOSED PROPOSED REGIONAL REGIONAL WATER WATER TRANSMISSION TRANSMISSION MAIN MAIN DAYTON TO TO REGIONAL REGIONAL WELL WELL OR OR WTP WTP

24 EnTech, Inc. Consulting Engineers Sheridan, Wyoming

25 DAYTON WATER TREATMENT PLANT

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