Loading...
HomeMy WebLinkAbout032903 ORD - 11/01/2022Ordinance adopting the North Beach Drainage Improvement Project Plan and repealing Ordinance No. 031970 authorizing a previous drainage solution. WHEREAS, the North Beach Drainage Improvement Project ("Plan") with preferred drainage improvement projects was presented to City Council on August 30, 2022, by MIG, Inc.; WHEREAS, the Plan includes priority projects to improve drainage on North Beach; WHEREAS, the first priority project is to elevate Beach Avenue, Gulfspray Boulevard and the beach access parking with pedestrian access to the beachwalk; WHEREAS, the second priority project is to design and construct a linear open space channel and elevate Timon, Surfside and access to Eco and Dolphin Parks; and WHEREAS, other priority drainage improvement projects may include new outfalls, backflow prevention, stormwater pumps and additional elevations and channels. BE IT ORDAINED BY THE CITY COUNCIL OF THE CITY OF CORPUS CHRISTI, TEXAS: SECTION 1. Ordinance 031970 is hereby repealed. SECTION 2. The attached North Beach Strategic Development Plan, providing for preferred future drainage improvement projects on North Beach, is hereby adopted. oithi I SCANNED Th t the foregoin ordinance was read for the first time and passed to its second reading on this the 3.1*\ day of , 2022, by the following vote: Paulette Guajardo Roland Barrera Gil Hernandez Michael Hunter Billy Lerma John Martinez Ben Molina Mike Pusley Greg Smith That the foregoing ordinance was read for the second time and passed finally on this the 1 day of `'A 2022, by the following vote: Paulette Guajardo Roland Barrera Gil Hernandez Michael Hunter Billy Lerma John Martinez Ben Molina Mike Pusley Greg Smith PASSED AND APPROVED on this the day of I��hr\'i)'�( , 2022. ATTEST: Rebecca Huerta Paulette Guajardo City Secretary Mayor 032 9©3 North Beach Strategic Development Plan CORPUS CHRISTI - NORTH BEACH Strategic Development Plan -Preferred Drainage Improvement Project Summary 1 Direct Tidal Flooding Direct Backflow Flooding Groundwater Seepage Flooding Ground Sea Level I Elevated Sea Level and Resulting Floodwater Gravity Flow Drainage Conduit Water Table Original Image from https://www.nature.com/articles/s41598-020-60762-4/figures/1 - Labels and photo examples have been modified) 2 2 7/ 1L/ LVL[ 3 4 5 Vulnerabilities • Areas subject to tidal flooding at highest observed tide, elevation 3.5'. • Additional areas are vulnerable to relative sea level rise and rainfall flooding. 6 6 Vulnerabilities • Key routes to beach access points and parks are vulnerable. Existing Roadway Flooding Vulnerability Higher Vulnerability Lower Vulnerability 7 7 A Layered Solution F. OPEN CHANNEL CONVEYANCE O. IMPROVE PIPED CONVEYANCE .'PST H. SEDIMENT MONITORING + CLEANING 8 Intervention Effectiveness Intervention(s) Direct Tidal Flooding Backflow Flooding Groundwater Seepage Flooding Rainfall Induced Flooding A. Dunes B. Seawall C. Tide Gates/Valves D. Elevate Infrastructure E. Elevate Parcels F. Open Channel Convey. G. Imp. Closed Convey. H. Sed. Monitoring + Clean. I. Stormwater Pumps #1. Stormwater Convey. + Ditch Imp. "Option 1" G+H #2. Linear Park "Option 2" A+D+E+F+G+H #3. Nay. Canal "Option 3A" A+D+E+F+G+H #4. Nay. Canal"Option 3B" A+D+E+F+G+H #5. Storm Drains w/ Elev. A+D+E+G+H 0000 0 00 0 000 000 0000 000 000 00000 00000 00000 00000 00000 00000 00000 00000 0 00 0 00 000 00 00 00 00 O 000 000 000 00000 00000 00000 00000 00000 00000 00000 00000 #6. Storm Drains w/o Elev. + Pumps A/B+C+G+H+I 00000 00000 00000 00000 9 Decision Criteria #2. Linear Park "Option 2" A+D+E+F+G+H Priority 1 0 0 $$ #3. Nay. Canal "Option 3A" $$$$ A+D+E+F+G+H C C 5) C i6 U Priority 2 N mdri T m 8 E 000 #4. Nay. Canal "Option 3B" $$$$ $$$ 0 A+D+E+F+G+H O U E � o E W 00000 00000 #5. Storm Drains w/ Elev. $$$ , ., _ 000 0000 A+D+E+G+H #6. Storm Drains w/o Elev. + $$$ $ '.:_- 0000 0000 Pumps A/B+C+G+H+I Priority 3 0 5+ C N O O OLaIA` N� C N J Q 00000 00000 00 0000 00 N U N UJ Q 0 0000 O O 00000 O 0 00000 * Delivery Timeframe category considers how quickly improvements can be implemented, including consideration of reliance on Public -Private agreements and interagency agreements. l0 10 Decision Criteria N O N 0 C N C 28 i2. Linear Park 'Option 2' 4+ D+ E+F+G+ H $'C 000 00000 00000 00000 0000 #3.Nay.Canal"Option3A" $$$$ SSS 0 00000 00 0000 00 A+D+E+F+O+H $$$$ 0 00000 00 0000 00 #4. Nay. Canal "Option 3B" A+D+E+F+G+H #5. StormDrainsw/Elev. $$$ S$SS 000 0000 0 0 00000 A+D+E+G+H Stora DrainswjoEleit P.111p5- G ,+II+I 0000 0000 0 0 00000 * Delivery Timeframe category considers how quicldy improvements can be implemented, including consideration of reliance on Public -Private agreements and interagency agreements. ll 11 Recommendation: Coastal Barriers Dunes • Prevents direct seawater flow over land. • Reduces tidal flooding. 12 12 Recommendation: Elevate Ke Access Routes • Prioritize improvements on along key access routes. • Reduces tidal flooding. 44, 13 13 Recommendation: Upgrade Stormwater Conveyance w/ Linear Park Canal • Reduces rainfall flooding. 14 14 Recommendation: Backflow Prevention (Lower Elev. Potential) • Elevation of private properties and some streets may not be feasible in some areas. • Mobile or permanent pump systems would be required to manage rainfall during higher tides. 15 15 Recommendation: Backflow Prevention (Higher Elev. Potential) • Phase additional infrastructure elevation with adjacent private property elevation. • Short-term improvements include installing backflow prevention and eliminating low points of existing streets. 16 16 Implementation LEGEND New Outfall Potential Stormwater Pump Station Piped Conveyance Upgrades Elevate key access routes Coastal Barrier Existing Park Linear Open Space with Open Channel Conveyance Upgrades Areas of Lower Potential for Redevelopment and Elevation (install backflow prevention for tow -lying areas) Areas of Higher Potential for Development or Redevelopment (Install backflow prevention for low-lying areas) • Confirm desired level of protection • Identify long-term revitalization plan and multimodal transportation needs • Implement short term elevation and conveyance design and phasing • Develop long term plan for low lying areas • Implement Sediment Monitoring and Cleaning Program *All steps include communication with public and stakeholders 17 17 Linear Open Space + Open Channel Emerging Design Guidelines Pedestrian connectivity to the beach Overall multi -modal connectivity Interest and attraction at varying tidal levels Accommodation for kayaking and paddle boats Areas that could allow future expansion into canal Water quality 18 Initial Funding Plan Available Budget: $9.55M (Bond 2018 + ARPA + FY23 General Fund)* First Priority (Gulfspray and Beach) • Elevate Beach Ave and Gulfspray. Elevate beach access parking and provide pedestrian access to beachwalk. *Available Budget: ARPA Bond 2018 - Beach Avenue Bond 2018 - Gulfspray Pedestrian Access Bond 2018 - NB Primary Access Project FY 2023 General Fund 1111 Second Priority (Design and Partial Construction of Linear Open Space Channel) • Elevate Timon and Surfside, Eco Park and Dolphin Park access (Sandbar Avenue). • Limited conveyance improvements along elevated streets. • Install new north -end outfall and portion of linear open -space open channel. • Confirm compatibility with future linear onen-snace oven channel. $5.00M $1.00M $0.30M $1.25M $2.00M 19 19 • Use a layered solution across the North Beach peninsula • Approve Linear Park (Option 2) and Storm Drains w/o Elevation (Option 6) • Install Coastal Barriers (Dunes) • Elevate Key Access Routes • Upgrade Stormwater Conveyance w/ Linear Park Canal • Exercise Backflow Prevention • Next Step: Hire an engineering firm to design the linear park and reconstruct North Beach roadways utilizing available funds 20 20