Santa Ana -Delhi Channel Improvements
ro'ect Overview.
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Background,
Purpose, &
Scope
Conceptual
Plans
0 Project
Schedule
Questions &
Answers
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NEWPORT BEACH ` {
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SANTA ANA
UPPER
NEWPORT ,��,p�N _
BAY
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CHANNEL TYPE:
Mixed Material Composition:
- Earthen, riprap (large rocks), and concrete
Limits:
Upper Newport Bay
Bayview Trail Pedestrian Bridge
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300 ft downstream of Mesa Drive
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Lower
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EXISTING CONDITIONS
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■ Constructed in 1965
■ Majority of upstream improvements completed
■ In 1991, OC Flood Control District received U.S. Army Corps of Engineers permit approval for an upstream portion of the channel system.
■ The approved permit conditions stipulated no future permits would be issued for the remainder of the channel system improvements until comprehensive mitigation for all channel improvements was completed.
■ The Project's Environmental Impact Report (EIR) includes the findings of the required mitigation studies.
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1. Provide flood control protection of current design standards
2. Decrease local scour along the channel and at the outlet to Upper Newport Bay and reduce sediment transported to the Bay
3. Provide habitat restoration, i.e. mitigation, for cumulative impacts associated to the entire channel system
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Golf Course
• Floods During Large Storms
• Existing Open Space / Outdoor Recreation
• Limited / No Play Interruption
Neighborhood
• Flood Protection
• Working Area Constraints / Aesthetics
Muth Interpretive Center
11 Vw • Educational / Volunteer Opportunities
• Engagement & Support for Conservation / Recreational Opportunties Multi -Use Trail
• Improve Trail Connectivity / Aesthetics
• Increase Flood Protection / Reduce Erosion
• Habitat Creation for Mitigation
Pedestrian Bridge
• Structure Foundation Improvements
• Trail Connectivity / Multimodal Active Transportation Safety Improvements 4
PROJECT SCOPE L6G
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`5-28' MA'NTENANCE ROAD: .:; •�k'
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ROW LINE '
20' OFFER EASEMENT LINE
20-20-MAINTENANCE RDA❑
RDJJLINE '
17.5-21,5' MAINTENANCE ROAD]
ERIST-NG FENCE LINE •� � --- -��
20-26' MAINT.
.1117 ROAD
's GRADING _
- - LIMITS ,
TURN.4R4U[
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TRAIL
'�•. :��. RDW LINE - ��.' . ... .. ..... f 4� .
. _ r±;f•'�{ ACCESS RAMP
DELHI CHANNEL CL ALIGNMENT
17.5' MAINTENANSEROAC frr "�' l
/ f MARSH AREA
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NEW 6RFCGE
x ROW LINE
... r T OG MULTI —USE TRAIL -.
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FLOOD CONTROL IMPROVEMENTS
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PRE "MINARY DESIGN CONCEPm' L6CI
EXISTING GROUND 15' MAINTENANCE �� 14' CONCRETE f
- n ROAD 7w MULTI -USE TRAIL rn-
COASTAL SALT COASTAL SALT COASTAL SAGE 6' DG_T. �4 >
MARSH MARSH SCRUB =
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BAYVIEW BRIDGE CONCEPT
EXISTING GROUND
COASTAL SAGE
SCRUB
RAN
®LYNN CAPOUYA INC.
LANDSCAPE ARCHITECTS
COASTAL SAGE
SCRUB
15' MAINTENANCE
ROAD
COASTAL SALT
MARSH
NEW BRIDGE
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EXISTING GROUND
COASTAL SALT COASTAL SAGE
MARSH SCRUB
RIPARIAN UPLAND -
TRANSITION
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Geosyntec ° (!C PublicWorks
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PRELIMINARY DESIGN CONCEPT L6G
® LYNN CAPOUYA INC. GeoS Cec"'
LANDSCAPE ARCHITECTS LCPublicWorks
consultants
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Illustration for Cori Only
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PRELIMINARY PROJECT SCHEDULE L6G
*Subject to change due to stakeholder and regulatory approvals, weather, budget, etc.
DESIGN
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0 >>> � >» 0 »»» CONSTRUCTION0
_� SUPPORT
NOV MAY JUN JULY AUG MAR SUMMER FALL FALL
2021 2023 2023 2023 2023 2024 2024 2024 2026
ROW ACQUISITIONS & REGULATORY PERMITS
CONSTRUCTION LATE
SUMMER FALL MAR JUN FALL CONSTR.
2023 2023 2024 2024 2024 END
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CONSTRUCTION
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O�L'�` �`Iti TO �loCtis 0' �'-9,Q rCeti rCA. 2026
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June 21 St 2023: Supervisor Foley Walking Tour, Upper Newport Bay o Guided walk with OC Parks
o OCPW to join and set up a Project information table near the Muth Center with project flyers
Mid -July 2023: Project Overview Open House
o OCPW Project Team host overview at Muth Center
Summer 2024: Pre -Construction Community Meeting
o OCPW Project Team and Contractor host
"What to Expect" Pre -Construction Meeting at Muth Cente
E-mail: [email protected]
Phone: 714-245-4500
Social Media:
Facebook.com/OCPublicWorks
Twitter.com/OCPublicWorks
Instagram #OCPublicWorks
YouTube #OCPublicWorks
Ex. Project Notices
.�anta Ana -Delhi Channel: __
Inspection of County Flood Conhol
Property for Future Improvements
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Q Future channel improvement prgect area Pr.1-1 personnel and small equipment ml be present Geot—h-.1 investigations wit occur at along the ch nnel area. A dn11 rig w01 be used to collect several locations along the County mainle- -1 somples.t various locations wil hi, the tutune project road wifhln this area, including near OfeO'
t he wyview Trail pedestrian bridge. NOTE: Public access a cross the E.yview nail pedestian bridge will remain.pen. One day (only 2-3 h.urs( will
require closrxe .f one "lone' while keeping one lone
open Fa continuws public access across the bridge.
Project personnel will be present to guide trail users
through the work mne.
This activity b in preparation for c future project to
improve the Santa Ana-oelhi channel to allow the con -
timed flow o7 water through the channel.
Augusf1711,2 can pm
Timing of ft&. channel improvement project has n.t
yet been identified.
NK YOU!