Pasadena Non-Potable Water Project. Public Meeting

Transcription

1 Pasadena Non-Potable Water Project Public Meeting December 6, 2016

2 Pasadena Non-Potable Water Project Phase 1 Supply AFY Customers - 4 Pipelines - 5 miles Reservoirs - 2, 1 in Glendale Pressure reducing station - 1 Upgrades to Glendale pumping system 2

3 Community Concerns During EIR Linda Vista Community > Impact to Canary Island Pine trees on Laurel Street > Cost increase due to buried utilities > Disruption to residents Sheldon Area Community > Disruption to residents Feb 22, EIR Public Hearing > City Council directed staff to evaluate two alternative pipeline routes 3

4 Discussion Topics Alternative Routes reputable consultants > RMC - pipeline evaluation and environmental > ESA - arborist report > W. A. Rasic Construction - costs and schedule > Amec Foster Wheeler - geotechnical review Grant application > Archaeological report > Gnatcatcher survey Basin Salt & Nutrient Management Plan 4

5 Reports Available Online - October 31, Alignment evaluation technical memo > Contractor s cost estimate & schedule > Geotechnical engineering review 2. Arborist report 3. Environmental evaluation of the alternatives - CEQA memo 4. Archaeological testing report 5. Gnatcatcher survey 5

6 Alternative Pipeline Routes Map 6

7 Arborist Report Certified Senior Arborist with extensive experience Tree assessments, health risk assessments & tree appraisals Expert witness testimony Services to cities of Los Angeles, Malibu, Calabasas, Agoura Hills, Thousand Oaks, Santa Clarita, Commerce, to counties of Los Angeles, Ventura, and San Luis Obispo 7

8 Arborist Report 160 trees surveyed with canopies within 30 feet of pipeline Tree rating based on distance to pipeline, exposed surface roots, lifting of soil and pavement, leaning Roots seek water, oxygen, nutrients and soil space Most roots grow in top 18 soil Approved West Route - 58 trees Alternative West Route - 37 trees Less than 3% roots in trench zone 8

9 Rendering of Laurel St. Looking East Arborist findings - including the Canary Island Pine trees on Laurel Canary Island Pines not impacted Trees Less than 3% of the tree roots expected in the trench zone Tree roots limited in roads - soil compaction, lack of water & oxygen More trees along the approved routes (58 vs. 37) 9

10 Environmental Evaluation - CEQA Memo Environmental impacts of the Approved & Alternative Routes less than significant > Temporary issues: noise, traffic, dust, limited access to properties during construction > Approved route impacts residents > Alternative route impacts recreational users near Rose Bowl If Alternative Route Selected > CEQA will have to be revised and approved by City Council - 4 to 5 months process 10

11 Contractor s Estimates West Routes Cost estimates factor in: > Limited work hours (some streets): 8:30 am - 3:30 pm > Tree and tree roots > Existing utilities and residential services Approved west route - 2,900 feet > $1.32 million - estimated cost Alternative west route - 5,200 feet > $2.23 million - estimated cost 11

12 Minimize Pipeline Construction Impacts Location of utilities during design Contractor will locate utilities & services prior to pipeline excavation Adjusted design before construction Experienced contractor Full-time construction inspection Full-time certified arborist Advanced notices to residents Limited work hours in small streets Construction Staging and Traffic Management Plan Noise and dust control 12

13 Geologic Hazards - Liquefaction Alternative Route - longer pipeline in potentially liquefiable zones > Liquefaction - saturated loose sandy soils can lose strength during an earthquake that causes settlement of the ground > Storing water behind Devil s Gate Dam may increase water table 13

14 Construction Impacts Approved West Route > 10 weeks > Temporary impact to residents driveways - 1 to 3 days Alternative West Route > 14 weeks > One lane accessible for vehicular and bicyclists 14

15 Alignment Evaluation Summary West Routes Evaluation Criteria 15 Linda Vista Community Approved Route Alternative Route Environmental Impacts = = Potential Impacts to Trees (& Canary Island Pines) + Geohazard Conditions - Liquefaction + Construction Challenges + Capital Cost * + Operations and Maintenance Cost + Schedule Impact + Potential Loss of State Funding + * The alternative route is more costly than the approved by ~$1 million Overall the Approved Route in the EIR is superior to the Alternative Route + Indicates the better option

16 Other Reports Archaeological report > 5 trenches > 3 professional archaeologists > 7 letters sent out > 3 Native American monitors Andrew Salas, Gabrielino Band of Mission Indians - Kizh Nation Adrian Morales, Gabrielino Tongva San Gabriel Band of Mission Indians Robert Dorame, Gabrielino Tongva Indians of California > Findings: no prehistorical artifacts or features found Gnatcatcher survey - no gnatcatchers > Pre-construction surveys required 16

17 Raymond Basin Salt & Nutrient Management Plan Raymond Basin Salt & Nutrient Management Plan > Assimilative Capacity (AC) = Objective limit Existing conditions > State A single project is not to exceed 10% of the AC > Up to 10% of salt & nutrient ( load ) in recycled water is projected to reach the water table > AC for the Monk Hill Sub-basin is 225 acre feet per year (AFY) of load & the Pasadena Sub-basin is 405 AFY of load Pasadena Non-Potable Water Project > Project buildout will provide 2,700 AFY for irrigation, 400 AFY in the Monk Hill & 2,300 AFY in the Pasadena Sub-basin > Ten percent of the load or 40 AFY in the Monk Hill & 230 AFY in the Pasadena Sub-basin will reach the aquifer which is less than the AC limits for each sub-basin 17

18 Two Community Meetings Today, December 6, 2016 at 6 p.m. > Pipeline route: Linda Vista Ave., Laurel St., Parkview Ave. or (alternative route) Salvia Canyon, West Dr. Thursday, January 12, 2017 at 6:30 p.m. > Pipeline route: Arroyo Blvd., Rose Bowl Dr. or (alternative route) Rosemont Ave. > Location: Brookside Golf Club, Arroyo Room Five reports available at: 18

19 Pasadena Non-Potable Water Project Questions? 19