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Forward Planning - Removing the Gamble From Rapid Growth

This presentation discusses the critical need for forward planning in managing wastewater treatment capacities amidst rapid population growth. Highlighting a case study from Steamboat Springs, Colorado, it traces the evolution of a treatment facility from its inception in the late 1980s to its expansion efforts in the early 2000s. Key strategies include enhancing reclaimed water usage, planning expansions, and adapting to regulatory requirements. Continuous, flexible planning is emphasized to effectively address the demands of growing communities and ensure sustainable wastewater management.

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Forward Planning - Removing the Gamble From Rapid Growth

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  1. Forward Planning -Removing the Gamble From Rapid Growth 2002 RMSAWWA/RMWEA Joint Annual Conference Steamboat Springs, Colorado September 18, 2002

  2. Location

  3. Existing Treatment Facilities

  4. Pre 1990’s Situation • In 1988, Treatment Facility Capacity was Rated 9.5 mgd and Existing Flow was 5.2 mgd from a Population of 52,000 • No Surface Water Discharge Permit, Utilized Land Application and Evaporation • As Flows Increased and Winter Discharge Capacity Decreased, City Required All New Golf Courses to Use Reclaimed Water • Result was an Extensive Reuse Distribution System

  5. Reuse Distribution System

  6. Traditional Planning • Facility Plan with a 20 Year Planning Horizon • Winter Discharge Capacity Continues to Decrease (RIBs) - Need Surface Discharge • Recommendation was a 10 mgd Tertiary Mechanical Plant (WRF) with Discharge to the Las Vegas Wash • The 19.5 mgd Total Capacity was Designed for a 2010 Population of 145,000; Triple the 1988 Population

  7. Population

  8. WRF Begins • When the WRF Began Operation in 1994, the Flow was Already Exceeding 10 mgd • Because of Extensive Use, the Throughput of the RIBs was Reduced to 4 mgd; Total Treatment Capacity was now 14 mgd • Treatment Capacity Designed for 2010 Would Be Exceeded in 1998

  9. Forward Planning Goals • To Meet the Ever Increasing Demands of a Growing Population • To Satisfy the Increased Use of Reclaimed Water • To Continue the City’s Commitment to Provide an Effluent that Consistently Exceeds the Regulatory Requirements

  10. Forward Planning Projects • Bridging Capacity Improvements Project (BCIP) • Provide a “Bridge” to Allow the Planning of Subsequent Expansions • Expand Biological Treatment Capacity from 10 mgd to 20 mgd • Operational October, 1998 • Phase 1A • Expand Tertiary Treatment Capacity from 16 mgd to 20 mgd • Operational October, 2000 • Phase 1B • Expand Entire Facility from 20 mgd to 30 mgd • Phase 2 • Expand Entire Facility from 30 mgd to 40 mgd

  11. BCIP

  12. Phase 1A

  13. Be Flexible • The Phase 1B Project (Designed as 15 mgd) Was Halted in November, 2000; Pending Resolution of Land Ownership and Associated Cleanup • Treatment Capacity of 24 mgd Will Be Exceeded about December 2003 Without an Expansion of WRF Capacity • Phase 1B Requires Minimum 36 months from NTP to Capacity Online • Influent Flow Vs. Existing Capacity Dictates that an Interim Capacity Project be Undertaken

  14. Required Capacity To Anticipate Projected Flows

  15. Water Reclamation Facility 3 mgd Expansion

  16. Water Reclamation Facility 8 mgd Expansion

  17. 8 mgd WRF Expansion Project Schedule • Bidding Anticipated 1st Quarter 2003. • Construction Complete 2nd Quarter 2006. • WWTP No. 3 / RIB’s (less BVP) Decommissioned at Completion.

  18. Future Planning • Rapid Growth in Southwest • Utilities Reaching Capacity in Southwest • Sewer Interceptors • Reclaimed Water Distribution System

  19. Future Satellite Facility • Site Identified, Property Available • Flow Monitoring Underway • Considering Initial 5 mgd Facility, Expandable to 10 mgd • Good Neighbor Facility (Covered, Odor-Controlled, No Solids Treatment)

  20. Satellite Facility Site

  21. Summary • Facility Plans with 20 Year Horizons Are Not Effective When You Grow By 1,000 people a Month For a Decade • Planning Must Be Continuous • There are Many Creative Ways to Expand an Existing Wastewater Plant • Be Flexible

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