Transcript Slide 1

Realignment of a Portion of a
Utah Lake Drainage Basin
Water Delivery System (ULS)
Pipeline through Provo and Orem
Environmental Assessment
Public Information Meeting – September 2010
What is NEPA?
• National Environmental Policy Act (NEPA)
of 1969
• Requires that any project using federal funds
must be environmentally and sociologically
reviewed
– Provides detailed project description
– Describes multiple alternatives
– Discusses existing environmental and sociological
setting
– Evaluates impacts on resources
2004 Plan Utah Lake
System Proposed Action
Environmental Assessment (EA)
Process for Provo Realignment
NEPA Process Action
Date
Issue Notice of Intent
February 25, 2010
Public scoping meeting and start of 30-day public scoping
period
March 23, 2010
Notice of Availability / Release Draft EA (Start of public
review and 30-day public comment period)
July 29 – Aug 30,
2010
Public information meeting
September 16, 2010
Extension of public comment period
Aug 30 - Sept 30,
2010
Notice of Availability / Release Final EA
November 2010
Complete design work and award construction contracts
Early 2011
Project History
• The ULS EIS was completed in September 2004.
• The No Action Alternative in the current EA was
the preferred alternative in the EIS.
Current Project Process
• Value Engineering Study Workshop completed in
December 2009 with the following recommendations
– 1) Avoid the geological slide area hazards along 1450 East
and Foothill Drive.
– 2) Minimize the length of pipeline in 900 East and avoid the
reach south of University Parkway if possible.
– 3) Reduce costs by using the shortest alignment that
avoids (1) and (2) concerns.
– 4) Alignments evaluated in this EA are a combination of
alignments recommended in the VE Study Report.
No Action Alignment/Geological Hazards
Purpose and Need
• Have not changed from those stated in the
ULS EIS.
• However, the proposed realignment would:
– Avoid active and historical landslides
– Reduce the risk associated with geologic faults
– Shorten the overall pipeline length
Alternative
Alignments
Key Resources
• Applicable to entire alignment
• Specifically discussed South of 2200 North
– Geologic Hazards
– Traffic
– Utilities
– Schools and Residences
Alternative 1
Geologic
Hazards
• Avoids Wasatch Fault and associated splays
• Geologic conditions may include liquefiable soils.
Mitigation measures would be incorporated into final
design and construction planning.
Traffic
• Seven Peaks Blvd, 700 N. and 2200 N. could be
closed with local access only.
• 900 E could be restricted to one lane in each
direction.
• 2320 N., 700 E, and 2270 N. (Opt A) would be
closed with local access only.
• University Ave maintain current number of lanes.
Utilities
• 700 N. has moderate utility congestion.
• 900 E and 2200 N have moderate to heavy
congestion Electrical transmission line may need to
be relocated along 900 E. Major storm drain
crossings required along 900 E at 820 N and 900 N.
• University Ave has minimal utility congestion.
Overhead utilities include power, high-voltage power,
and communication lines.
Schools &
Residence
• 3 schools (Wasatch Elementary, Rock Canyon
Elementary and Centennial Middle)
• Brigham Young University (BYU)
• Impacts residential homes that front the alignment
primarily along 700 N and 2200 N. The majority of
the alignment is located in major collector and
arterial streets (900 East and University Ave)
Alternative 2
Geologic
Hazards
• Avoids the Wasatch Fault and associated splays
• Geologic conditions include liquefiable soils. Mitigation
measures would be incorporated into final design and
construction planning.
Traffic
• Residential streets south of 4525 N would be closed
with local access only.
• 900 E could be restricted to one lane in each direction
• 4525 N between Canyon Rd and University Ave would
be reduced to 1 lane with flagger or automatic traffic
signal.
• Current number of lanes would be maintained in
University Avenue.
• 1200 E and Cherry Ln have moderate utility
congestion. 2-inch gas line and short reaches of 4- and
6-inch water lines would likely be relocated.
• Timpview Dr and 4525 N have moderate to significant
utility congestion. During construction 2-inch gas line and
sections of storm drain would be relocated at Timpview
Dr, portions of 15-in irrigation line would be relocated at
4525 N.
• University Ave has minimal utility congestion. Overhead
utilities. Approx. 85% of alignment, has 10- and 6-inch
parallel sewers on both sides of street (no sewer lateral
crossings)
• 3 schools (Rock Canyon Elementary, Timpview High,
and Edgemont Elementary)
• Impacts residential homes along 1200 E, Apple Ave,
Cherry Ln, Timpview Dr, and sections of 4525 N. Option
Utilities
Schools &
Residence
Alternative 3
Geologic
Hazards
• Crosses landslide shown on USGS map (Baker, 1964).
Alignment crosses ~1,200-ft length of landslide.
• Specific geotechnical investigation and design measures would
be required to ensure stable final slope configuration
• Wasatch Fault appears to cross 1450 E alignment 4 or 5 times.
Faults not located with detail or accuracy. Trenching studies
would be needed to identify fault locations (Golder, 2010).
• Golder Assoc evaluated the No Action/ Alt 3 in vicinity of
1450 E. Found pipeline construction on 1450 E presents least
favorable alternative for pipeline integrity; potential geologic
hazards (Golder, 2010). RB&G Engineering performed a
geologic hazards analysis in May 2010. Hazard analysis
supports Golder findings.
Traffic
• Traffic considerations for Seven Peaks Blvd, 1450 E, 2200 N,
2320 N, and University Ave discussed in Alt 1. Descriptions
would also apply to Alt 3 alignment.
• N Temple Dr (1450 E to1200 E) closed with local access. 1200
E to 900 E, would have 2 traffic lanes.
Utilities
• Utility relocation and avoidance procedures along Seven Peaks
Blvd and 1450 E are described in the ULS EIS.
• 1450 E and N Temple Dr have moderate utility congestion.
1450 E contains parallel 8- and 16-inch water lines which restrict
the width of corridor for the pipeline.
• Utility congestion along 2200 N, 2320 N, Canyon Rd, and
University Ave is discussed under Alt 1
Schools &
Residence
• 2 schools (Rock Canyon Elementary and Centennial Middle)
• Residential homes located along 1450 E, N Temple, and
2200 N.