Action Plan Overview SWIF ACTION PLAN DRAFT

Transcription

1 SWIF ACTION PLAN DRAFT Action Plan Overview The SWIF Action Plan chapter describes the actions, funding and implementation of the Pierce County System Wide Improvement Framework (SWIF) plan. Implementation of the SWIF will be aligned with programmed funding over a 20-year period ( ). The Action Plan is a component of the SWIF Plan that is scheduled to be released summer The Action Plan also establishes the schedule and milestones that will be coordinated with the United States Army Corps of Engineers (USACE) to track Pierce County s progress in executing the SWIF. The schedule integrates all key activities for implementation, with identified milestones prioritized for implementation. Rectification work will focus first on correcting identified deficiencies that pose the greatest risk to life safety and critical infrastructure while minimizing impacts to critical habitat. Programmed maintenance work will be directed to where there is a need to improve the performance of the levee to offset levee segments of chronic repetitive damage or changing site conditions. Capital improvements will be prioritized through the 6-year CIP funding process that will govern the pace of implementation. Structural and nonstructural interim risk reduction measures will be implemented as needed, to reduce risks in locations where a capital improvement project or maintenance action is needed, but implementation is delayed. The Action Plan is organized into the following elements: Deficiency Action Plan: How levee deficiencies either identified by the USACE through the USACE Continuing Eligibility Inspection (CEI) program, or through condition assessments coordinated through County Asset Management Program will be corrected. The intent is to correct all unacceptable deficiencies to maintain program eligibility and to prioritize actions to address deficiencies that are rated at Minimally Acceptable. Maintenance Program: How levee deficiencies will be identified, assessed, and maintained until they are corrected per the implementation schedule. The intent is to not allow further deterioration of the levee system while the SWIF is implemented. This plan will address routine maintenance as well as repair actions, identified through the Pierce County Surface Water Management (SWM) Maintenance and Operation Section, Asset Management Program. IRRM Plan: How levee deficiencies will be addressed with structural and non-structural activities that reduce flood risks, while programmatic and capital projects are being implemented. The intent is to provide for appropriate level IRRM to optimize flood risk reduction while the SWIF is being implemented. Action Plan Outline - DRAFT 1

2 Capital Maintenance Program: How identified levee performance goals will be met through a program of focused improvements (refinements) to the PL existing levee structure. The intent is to improve the resiliency of the levee system to better withstand the forces of the river and reduce risk over time. Capital Improvement Plan: How capital projects along PL84-99 levees identified in the Pierce County Rivers Flood Hazard Management Plan (RFHMP), Flood Control Zone District (FCZD) Comprehensive Plan of Development (CPOD), and SWM Capital Improvement Plan will be implemented. May include improvements to the existing structure that increase the level of service protection (i.e. raising levees, construction of floodwalls on top of existing levee). The intent is to provide a suite of capital improvements for flood risk reduction as identified in the FHMP, or as needed to offset USACE identified levee maintenance deficiencies. Funding and Implementation How the SWIF Action Plan will be implemented and funded over the duration of the plan. The intent is to show the sources of funding available to pay for the correction of short term deficiencies that will be addressed through the maintenance program and to develop a funding plan to implement long term capital improvements over the lifespan of the SWIF plan. Level of Service Goals incorporated into SWIF (Note: Revetment structures along PL84-99 leveed rivers are not included in this SWIF.) The RFHMP establishes Level of Service Goals for levees and (revetments), listed below: year Level of Protection Levees are designed and maintained to the 200-year level of protection with three feet of freeboard. Proposed Application: Lower Puyallup River from the river mouth at Commencement Bay to the confluence of the White River (River Mile RM 0 RM 10.3), including the cities of Tacoma, Fife, and Puyallup, and parts of unincorporated Pierce County. This could include a setback levee along North Levee Road, flood walls or some other approach. (Long-term) year Level of Protection Levees are designed and maintained to the 100-year level of protection with three feet of freeboard. Proposed application: Most new levees, including setback levees (e.g., Soldiers Home, Calistoga setback levees) and in urban areas (e.g., city centers, high density residential) such as Puyallup, Sumner, Pacific and Orting, not including the Lower Puyallup River. (Long-term) 3. Maintenance of Existing Level of Protection Maintain the existing level of protection as defined in USGS 2009 carrying capacity conveyance capacity analysis. This might be achieved through actions such as sediment management in river reaches with ongoing sediment accumulation, or improvements in freeboard through construction of temporary or permanent flood walls, Hesco TM barriers, super sacks or other means. Action Plan Outline - DRAFT 2

3 Proposed Application: Existing levees in the Middle Puyallup River reach between RM 12.0 and RM 17.4; this is an urban/rural transition area, with higher value agricultural areas, with some Chinook and steelhead spawning. (Mid-term/Long-term) 4. Maintenance of Existing Levee Prism Maintain the existing levee in terms of height, toe and facing rock to ensure minimum standard of levee integrity. In some locations with long-term net sediment accumulation, the level of protection will decrease over time. Proposed Application: Rural (low density residential) and open space areas, agricultural areas, areas of salmon spawning and rearing (particularly for listed species, including Chinook, steelhead and bull trout). This is proposed for all levee reaches not in the Lower and Middle Puyallup, Lower White or Orting area. (Near-term/Mid-term) Phasing and Sequencing of the Action Plan The Action Plan elements will be implemented through one or more of the following phasing and sequencing categories: 1. Near-term actions to be completed in Mid-term actions to be completed concurrent w 6 year CFP ( ) 3. Long-term actions to be completed after Programmatic actions that are ongoing 5. Monitoring actions that are ongoing SWIF Priority Ranking This priority ranking matrix (Figure XX.x) provides a methodology to help prioritize the repair and rehabilitation of flood risk reduction structures. The scoring criteria takes into account multiple risk factors to help drive the selection process, including: land use at risk; perceived threat to public safety; infrastructure at risk; frequency of damage. All four prioritization categories assume impacts due to flooding in the event deficiencies are not corrected leading to failure of the levee structure. A damage severity rating multiplier is applied based on site inspections that will assess the severity of the damage to the levee. Projects that receive the highest points based on level of risk are ranked as the highest priority. Additionally, resources available and complexity of project based on permitting requirements, site characteristics and seasonal conditions may influence when a project is completed. Action Plan Outline - DRAFT 3

4 Priority Ranking Worksheet River System: Puyallup Carbon White Nisqually (circle one) Levee Segment: Damage Location Damage Length: Damage Severity 1) General Land Use at This criterion is intended to give different weights to different types of land uses based on economic value. (If than one type of land use is at risk, add the scores for the land uses with the 2 highest scores. Use the score provided to give more or less weight based on site specific Scoring 9 - Light 8 - Urban with high-density 6 - Suburban with moderate-density 4 - Rural with low-density 3 - Resource Lands (Agricultural, Timber, Recreational/Open Criterial 2) Perceived Threat to Public This criterion is intended to evaluate the magnitude of potential flood risk to impacted Scoring High density population impact (> Moderately high density population impact (>1000, < Moderate density population impact (>500, < Moderately low density population impact (>100, < Low density population impact (< Criterial 3) Infrastructure at This criterion is intended to address important infrastructure and escape Scoring Critical Facilities (schools, fire & police stations, child & group care facilities, 8 - Important Transportation Corridors (lifeline arterials/sole-access road/state highways/interstate 5 - Secondary Transportation Corridors (all other Criterial 4) Frequency of Damage (historical This criterion is used to show how often the damage has occurred to the facility in past years Scoring < > 2, but < > 6 but < > Criterial Damage Severity Rating (Multiplier): Based on latest Condition 1 Minor - Minor 6 Moderate - 2 Minor 8 3 Minor - Moderate 10 Imminent 4 Score Action Plan Outline - DRAFT 4

5 Summary of Action Plan: ( ) The following table provides a summary of the actions included in the SWIF, as phased over the next 20 years of implantation of the SWIF progresses. This table will be incorporated into biannual reporting provided to the USACE. Action Schedule Actions Completed Near-term Actions Timing Action Types Actions (identified) Mid-term Long-term Programmatic ongoing Actions Monitoring Actions Table XX ongoing Completed actions addressed the following deficiency types (See Deficiency Action Plan ): Vegetation Work (NR levee segments) Culvert/pipe (CCTV) inspections, Vegetation maintenance work USACE Levee Screenings (LSAC) Culvert/pipe (CCTV) Inspections Levee Inspections/assessments Vegetation management work Levee Repairs USACE Levee Screenings (LSAC) Levee Site Geotechnical Assessments Access Road Repair Work (Levee Road Capital Maintenance Work Capital Improvements Capital Improvement Program Asset Management Program (AMP) Capital Maintenance Program (mid term work) Levee Mitigation (HCP) Programmatic Permitting Vegetation Management Strategy: o Levee Inspection/access o Replanting Program o Invasive Species Control o Hazard Tree Identification Levee structural deficiencies (minor- Moderate): o Closure Structures o Slope Stability (minor) o Erosion/Bank Caving o Culvert/Pipes o Encroachments o Underseepage Wells/Toe Drainage Culvert Pipe deficiencies (minor) Action Plan Outline - DRAFT 5 51 Culvert/pipes Inspected Levee repairs: o 2014 (7) repairs o 2015 (15) repairs o 2016 (6) repairs 2.2 miles of vegetation work 26 Levee fragility analysis 18 LSAC screenings (TBD) Culvert Pipes CCTV 39 miles of Levee Inspection (TBD) Road Repair Projects (17) Levee Repairs (2016) 2 Levee fragility analysis 10 LSAC screenings Implement Veg. Strategy 2 Levee Fragility/LSAC Analysis Implement Cap. Maint. Program 1 - Capital Maintenance Project 13 - CIP Projects 32 FHMP Identified CIP Projects Levee Setback Projects Implementation: (2017) AMP Programmatic Permitting Vegetation Strategy (SOP s) (2018) Levee Mitigation (HCP) Capital Maintenance Program Ref. Deficiency Action Plan - table XX.x (1) Culverts (Leach Road) Levee Slope Stability Planting Program Invasive Species Program Hazard Trees

6 Deficiency Action Plan This section summarizes how and when USACE defined PL84-99 deficiencies on the system of PL84-99 levees will be addressed. The Deficiency Action Plan provides a road map for how deficiencies will be resolved through implementation of the Pierce County SWIF plan. The Deficiency Action Plan will guide the activities needed to correct deficiencies, providing anticipated milestones that will be incorporated into future USACE levee inspections and programmatic reporting requirements. Deficiencies will be addressed through either the maintenance program, the capital maintenance program, the capital improvement program, or engineering analysis that determines the deficiency to be acceptable. Structural and non-structural interim measures will be implemented as needed to address identified levee deficiencies to reduce flood risks in locations where maintenance or a capital improvement action is needed but implementation is delayed. Additionally, measures to address levee segments exhibiting chronic maintenance problems and areas of highest risk are identified to be addressed with appropriate corrective actions to reduce repetitive damage. Phasing and Sequencing of Corrective Actions The objective is to generate a phased and sequenced approach to resolving current levee deficiencies, so that each deficiency is evaluated and prioritized using a risk based approach; paired with consideration for what additional work could be completed subject to opportunity and available resources. The actions are driven by the results of annual condition assessments performed by County staff and bi-annual inspection performed by the USACE. Actions to resolve deficiencies will then be phased for correction dependent upon the complexity of the work and available resources. Identified repair projects are ranked and incorporated into the annual work plan. The work plan includes a prioritized schedule showing the preferred sequence of deficiencies to be corrected first. Based upon the risk associated with a USACE identified deficiency, a two year time period is available to take the necessary corrective actions. However, the deficiencies posing the greatest flood risk will be addressed first, while secondary risks may be postponed until the following year. Postponed deficiencies will be monitored, with interim risk reduction measures applied as appropriate. (See SWIF Priority Ranking Worksheet, Table XX) Corrective actions are prioritized into three general time categories: near term, mid-term and long term. Near term actions are actions that are generally planned to be addressed within a one year period. Levee structural integrity deficiencies and Levee culvert/ discharge pipe deficiencies either identified through CEI inspections or through routine condition assessments are prioritized. Levee structural deficiencies such as Unacceptable rated slope erosion or stability deficiencies are considered as a high priority. Additionally, levee culverts and discharge pipes with an unacceptable rating are rated as a high priority. Deficiencies rated as Minimally Acceptable and high risk will be programmed as a high priority. Action Plan Outline - DRAFT 6

7 Mid-term actions generally include capital improvement projects listed in the RFHMP and FCZD 6-year plan. However, identified capital maintenance actions may also be included in the midterm action plan when necessary due to the complexity and cost associated with capital maintenance solutions. Long-term deficiency corrective actions are those actions that have been identified beyond the current 6- year plan, referenced in the Pierce County Rivers Flood Hazard Management Plan (FHMP). These are projects of a complex nature that are aimed at flood risk reduction on a much larger scale that can be addressed through typical maintenance actions. These projects frequently require in depth multi-discipline technical studies, collaboration with resource agencies, public outreach, dynamic funding plans, as well as many other challenging issues to navigate. Many of these projects require preliminary steps that take several years to get through and may ultimately take decades. The ultimate goal of these projects is to implement a long term strategy to reduce flood risks as well as build resiliency into the system. Finally, some deficiencies will be resolved by implementation of programmatic strategies that include the Vegetation Management Strategy Plan, and ongoing monitoring of levee conditions through SWM s Levee Asset Management Program (AMP). Overview of Deficiency Corrective Actions This is a general overview of the corrective actions to address the identified deficiencies and those actions that will be employed as new deficiencies are identified, either through UASCE Continuing Eligibility Inspections (CEI), or through the SWM Riverine Asset Management Program (AMP). Type of Corrective Action 2015 Actions Completed Near- term Actions Mid-term Actions Timing Deficiency - Corrective Action Items Completed actions addressed the following deficiency types: culvert/pipe (CCT/Camera) inspections; vegetation management; levee repairs Examples of near-term corrective actions, include: 1. Routine maintenance 2. CCT of remaining outfall/pipe 3. Annual levee condition assessments 4. Removal of encroachments 5. Levee repairs from seasonal floods Includes the following actions: 1. Site assessments to monitor deficiencies 2. Access road improvements 3. Culvert Repair/Replacement) 4. Levee Repairs requiring a Capital Maintenance Solution 5. Programmed Capital Improvement Projects (Projects included on 6-yr. CIP Action Plan Outline - DRAFT 7

8 Long-term Actions Includes the following planned actions: 1. Capital Improvement Projects (included on SWM- RFHMP, FCZD/CPOD) 2. Programmatic Actions Includes the following programmatic actions ( ): 1. Asset Management Program 2. Vegetation Management 3. Invasive Species Program 4. Capital Maintenance Program 5. Levee Mitigation 6. Programmatic Permitting Monitoring Levee Structural deficiencies 2. Culvert/pipe deficiencies 3. Hazard tree assessment Table?? Action Plan Outline - DRAFT 8

9 Deficiency Action Plan Matrix (Based on 2010 and 2013 Inspections, pending Corps 2015 CEIs). Map # Levee Name 1 Nisqually Park 2 Greenwater 3 North Levee Road 4 River Road (Puyallup) 5 Old Cannery USACE Final Rating after 2013 Inspection Minimally Acceptable Minimally acceptable Minimally acceptable Minimally acceptable Minimally acceptable 6 *River Grove Unacceptable Issues raised in the USACE 2013 Inspection report (Levees with * indicates issues from USACE 2010 Inspection report) Issue rating U 2014) U 2014) 2014) U Item NOT RATED (Culvert) NR 2014) M Items NOT RATED (Bank Protection) NR Culvert Discharge Pipes U 2014) U Sod Cover Needed (No 2014) M Items NOT RATED (Rip Rap Bank Protection) NR 2014) U NOT RATED(Slope Stability,Erosion,Animal Control,Rip Rap Bank Protection) NR Depression/Rutting M Status as of Nov 4, 2015 Work required to address deficiencies Status of Corrective measures Priority Action Schedule Inspection Report delivered to USACE Aug Completed Complete Action Completed Monitoring on going Monitor/Low Inspection Report delivered to USACE Aug Completed Complete Mid-Term Action Completed Vegetation Strategy TBD Near-Term Vegetation removal needed to rate items listed Monitoring on going Monitor-Medium Mid-Term Completed Vegetation Thinning October 2015 Completed Complete Action Completed Repair levee crown depression STA 13+00, RM 11.1 Incomplete High Mid-Term Action Plan Outline - DRAFT 9

10 Map # Levee Name USACE Final Rating after 2013 Inspection 7 * Riverside Unacceptable 8 * Bowman/Hilton Unacceptable 9 * Sportsman Unacceptable 10 * McMillin Unacceptable Issues raised in the USACE 2013 Inspection report (Levees with * indicates issues from USACE 2010 Inspection report Issue rating 2014) U Encroachment (Barbed Wire Fence Prevent vehicle access) M NOT RATED(Slope Stability,Erosion, Animal Control, Rip Rap Bank Protection) NR 2014) U Items NOT RATED (Slope Stability, Erosion, Animal Control) NR Rip Rap Bank Protection M 2014) U Encroachment (Clear Fallen Trees and Debris) M NOT RATED(Slope Stability, Erosion, Animal Control,Rip Rap Bank Protection) NR Culverts/Discharge Pipes U 2014) U Encroachment (Debris at River Mile 16.3) U Items NOT RATED (Slope Stability, Erosion, Cracking) NR Status as of Nov 4, 2015 Work required to address deficiencies Remove- Relocate Barbed Wire Fence RM 12.7 Status of Corrective measures Priority Action Schedule Incomplete, plan is to install 3 gates via work order High Mid-Term Completed Vegetation Thinning October 2015 Completed Complete Action Completed Completed Vegetation Thinning October 2015 Completed Complete Action Completed Inspect bank armoring after vegetation is cleared Incomplete Monitor-Medium Mid-Term Clear Fallen Trees and Debris Completed/Item corrected Complete Action Completed Completed Vegetation Thinning October 2015 Completed Complete Action Completed Inspection Report delivered to USACE Aug Completed Complete Action Completed Remove Debris at River Mile 16.3 Completed/Item corrected Complete Action Completed Completed Vegetation Thinning October 2015 Completed Complete Action Completed Action Plan Outline - DRAFT 10

11 Map # Levee Name USACE Final Rating after 2013 Inspection 11 Bower/Parker Unacceptable 12 High Cedars Unacceptable Issues raised in the USACE 2013 Inspection report (Levees with * indicates issues from USACE 2010 Inspection report Issue rating 2014) U Erosion/Bank caving M 2014) U Encroachment (Unauthorized excavation STA 5+00, Debris STA 11+00) M Erosion/Bank caving Depression/Rutting M M Status as of Nov 4, 2015 Work required to address deficiencies Repair Bank STA 7+00 (400 ft.) RM 16.7 Fill Excavation STA 5+00; Remove Debris STA Repair Bank STA64+00 (RM 18.71); (RM 18.80); (RM 19.35); (RM 19.58); (RM 19.62) Regrade levee crown STA (RM 18.0) Status of Corrective measures Priority Action Schedule Remained stable through recent flood events Monitor-Low Long-Term Working with property owner to cure encroachments Low Near-Term Complete. To be corrected/repaired 2016/2017 High Long-Term To be corrected/repaired 2016/2017 Monitor Near-Term 13 Calistoga Unacceptable Animal Control M Monitor Burrows STA Monitoring Monitor Near-Term Culverts/Discharge Pipes M Inspection Report delivered to USACE Aug Completed High Action Completed New Setback Levee 2014) U Completed August 2015 Completed Complete Action Completed New Setback Levee Erosion/Bank caving M Completed August 2015 Completed Complete Action Completed New Setback Levee Depression/Rutting M Completed August 2015 Completed Complete Action Completed New Setback Levee Animal Control M Completed August 2015 Completed Complete Action Completed New Setback Levee Culverts/Discharge Pipes U Completed August 2015 Completed Complete Action Completed New Setback Levee Rip Rap Bank Protection M Completed August 2015 Completed Complete Action Completed Action Plan Outline - DRAFT 11

12 Map # Levee Name 14 Leach Road 16 Jones USACE Final Rating after 2013 Inspection Minimally Acceptable Minimally Acceptable 17 Old Soldiers Home Acceptable Issues raised in the USACE 2013 Inspection report (Levees with * indicates issues from USACE 2010 Inspection report Issue rating 2014) U Erosion/Bank caving Items NOT RATED (Culvert) M NR Rip Rap Bank Protection M U 2014) 2014) M Culverts/Discharge Pipes M Status as of Nov 4, 2015 Work required to address deficiencies Status of Corrective measures Priority Action Schedule Repair Bank 26+00/RM 19.59; STA 91+00/ RM Incomplete Low Near Term Inspection Report delivered to USACE Aug Incomplete High TBD Replace Bank 26+00/RM 19.59; STA 91+00/ RM Incomplete Low Near Term Vegetation Strategy TBD Inspection Report delivered to USACE Aug Completed Complete Mid-Term Action Completed 18 McAbee Minimally acceptable 2014) U Rip Rap Bank Protection M Monitor during high water events Monitoring on going Monitor Long-Term 19 Ford Minimally Acceptable Unwanted Vegetation Encroachment (Large Wood Beams) Erosion/Bank caving U M U Remove Large Wood Beams STAs & Repair Bank STA (200 ft.) New Access Gates Installed, Issue corrected Complete Action Completed Repair completed by Corps Aug. '13 Complete Action Completed Action Plan Outline - DRAFT 12

13 Map # Levee Name USACE Final Rating after 2013 Inspection 20 Needham Road Acceptable 21 Lindsay Minimally Acceptable 22 Riddell Unacceptable 22 Orting Treatment Plant Unacceptable Issues raised in the USACE 2013 Inspection report (Levees with * indicates issues from USACE 2010 Inspection report Issue rating 2014) M 2014) U Encroachment (Barbed wired Fencing) Erosion/Bank caving M M Animal Control M 2014) U Erosion/Bank caving Culverts/Discharge Pipes M Rip Rap Bank Protection STA & M 2014) U Erosion/Bank caving Culverts/Discharge Pipes U U U Status as of Nov 4, 2015 Work required to address deficiencies Status of Corrective measures Priority Action Schedule Fencing does not Relocate Fencing STAs prevent levee access, 17+00, 25+00, 28+00, no work needed TBD Long-Term Repair was put on hold, and bank has Repair Rock displaced remained stable STA83+00(CR 1.4);Scour through recent flood STA14+00(CR 0.1) events Monitor/ Low Near Term Monitor Burrows STA 4+00; STA Monitoring on going Monitor Near Term Repair Bank STA Repairs completed as (RM 0.35) of 2014 Complete Action Completed Inspection Report delivered to USACE Aug Completed Complete Action Completed Repair Rip Rap STA 19+00;73+00 & Repair at STA completed by County Summer '13 Complete Action Completed Monitoring 51+00, Repair Bank STA to to ; Repairs complete 51+00;21+00;17+00;13+00 other locations Monitor/ Low Long-Term Inspection Report delivered to USACE Aug Completed Complete Action Completed Rip Rap Bank Protection U Repair Rip Rap STA to 69+00; 51+00; 17+00:15+00 Monitoring 66+00to Repairs complete other locations Monitor/ Low Long term Action Plan Outline - DRAFT 13

14 Map # Levee Name USACE Final Rating after 2013 Inspection 23 Bridge Street Unacceptable 24 Guy West 25 Water Ski Levee 26 Alward Segment No. 1 Minimally Acceptable Minimally Acceptable Minimally Acceptable 27 *Alward Segment No. 2 Unacceptable 28 *Potelco Unacceptable Issues raised in the USACE 2013 Inspection report Issue (Levees with * indicates issues from USACE Rating 2010 Inspection report 2014) U Erosion/Bank caving STA (100 ft.) &17+00 (20 ft.) RM 3.4 to 3.6 U Depression/Rutting STA & Tree Damaged STA M Rip Rap Bank Protection STA (100 ft.) &17+00 (20 ft.) RM 3.4 to 3.6 U Unwanted Vegetation U Status as of Nov 4, 2015 Work required to address deficiencies Repair Embank 15+00(100 ft.);17+00(20 ft.);toe Repair20+00(20ft) Fill depression and monitor; remove tree repair damage Replace Bank Protection STA (100 ft.) &17+00 (20 ft.) Erosion/Bank caving M Repair Bank STA Rip Rap Bank Protection M Repair Rip Rap STA U 2014) Rip Rap Bank Protection M All Repairs completed as of September ) U Culverts/Discharge Pipes 2014) Sod Cover Needed M Encroachment STA 6+00 (Garden; No access STA to STA 16+00) U 2014) U Sod Cover Needed U U U Status of Corrective measures Priority Action Schedule Repairs complete as of Sept Complete Action Completed Repairs complete as of Sept Complete Action Completed Repairs complete as of Sept Complete Action Completed Vegetation Strategy TBD Action Completed Repairs complete as of Sept Complete Action Completed Repairs complete as of Sept Complete Action Completed Covered by Interim policy TBD Action Completed Repairs complete as of Sept Complete Action Completed Vegetation Strategy TBD Action Completed Inspection Report delivered to USACE Aug Completed Complete Mid-Term Interim Policy Obtaining Easements to construct repair/reestablish full access Obtaining Easements to construct repair/reestablish full access Interim Policy Interim Policy Erosion/Bank caving M Repair Erosion Depression/Rutting U Interim Policy Culverts/Discharge Pipes U Inspection Report delivered to USACE Aug Rip Rap Bank Protection U Replace Rip Rap Ongoing work to correct issues High Mid-Term Ongoing work to correct issues High Mid-Term King County is currently planning to construct a setback levee to replace existing levee. Construction scheduled to begin in Spring of Project completion scheduled for December High Mid-Term Action Plan Outline - DRAFT 14

15 2016 Maintenance and Operations Scheduled Levee Repair Work The following (table, XX.x), lists levee repair projects that are scheduled for completion in The projects were identified through the annual levee condition assessment survey that follow seasonal weather events. The listed project sites are given a condition assessment rating, based on the severity of the damage observed. The damage site was then reviewed against the Levee Scoring and Prioritization Worksheet (See Chapter XX.X). Projects are then scored and assigned a priority rating determined by the level of risk and severity of damage. Those projects with the highest rating are to be worked upon first within the next year work schedule as Near-Term projects. Benston is a revetment repair project (Benston PR9.4) scheduled for completion in the work timeline as a Capital Maintenance project; due to the level of cost and complexity of the work involved. IRRMs will be employed to insure that risk is minimized in the interim prior to completion. This is not a PL84-99 levee, but is reflected in the list of levee repair projects below. Action Plan Outline - DRAFT 15

16 Maintenance Program This section outlines how the system of PL84-99 levees will be maintained over time, as implemented through the SWM Maintenance and Operations Asset Management Maintenance Program. (For more detail on the Maintenance Program, see Chapter 4 - Regional Considerations, Routine Maintenance and Rehabilitation. ) The Maintenance Program seeks to standardize condition assessments and thresholds for when action is needed; to perform routine maintenance work, proceed with more extensive repair work, or a capital project solution. The maintenance program includes routine work such as levee access mowing, culvert/ discharge pipe cleaning, and levee structure repair work needed to maintain the function of the levee system. Actions needed to repair levees damaged from flood events will also be addressed through the maintenance program. Levee deficiencies will be monitored and maintained until they are corrected per the SWIF implementation schedule. The intent is to not allow further deterioration of the levee system while the SWIF is implemented. The Vegetation Management Strategy Plan will be implemented as a component of the SWIF Maintenance Program (See Chapter 4.XX, Levee Vegetation Management ). Maintenance Programmatic Measures Programmatic Measures include planned annual actions that will be implemented over the life of the SWIF plan. This includes the following: Asset Management Program - standardizes the inventory, condition assessments, and thresholds for when work is needed. Levee Maintenance Program identification, monitoring and correction of deficiencies identified through annual condition assessments and work orders. Capital Maintenance Program to build increased resiliency into the levee structure to better withstand changing river conditions and offset level of risk. Levee Repair Mitigation Program coordinating levee repair mitigation work, with the Rivers Habitat Conservation Plan. Vegetation Management Program Programmed work needed to maintain vegetation growth upon the levee to insure accessibility, and structural integrity is maintained. The Vegetation Management Strategy will be implemented as a component of the SWIF Maintenance Plan. (See Chapter XX.x) Riparian Enhancement Programmed work to provide plantings benefiting riparian habitat associated with levee maintenance and repair work (Puyallup Tribal Agreement). Invasive Species Control Program Program to control the spread of invasive vegetation upon the levees (knot weed, tansy, scots broom). Programmatic Permitting Program to apply a comprehensive approach to permitting of levee maintenance work. Action Plan Outline - DRAFT 16

17 Phasing and Sequencing of Corrective Actions Prioritization of maintenance/repair projects will be based on information collected through the AMP condition assessments to determine the level of maintenance deficiency and to inform the risk analysis process. The department will evaluate condition assessment reports to determine the severity of the maintenance deficiency and the risk to the flood control facility, nearby infrastructure and populations if the deficiencies are not corrected prior to the next flood season. Ongoing engineering analysis to determine levee structural integrity will direct programmatic actions to improve levee performance through the Capital Maintenance Program. Levee deficiencies identified from CEI inspection reports will be prioritized for correction based on the assessed level of risk. (See SWIF Priority Ranking Worksheet, Table XX) Low risk deficiencies will either be programmed for work either with other routine maintenance work or monitored to insure that the deficiency does not worsen overtime. Maintenance Action Plan Type of Corrective Action Timing Deficiency - Corrective Action Items 2015 Actions Completed Condition Assessments Vegetation Maintenance Access Road Mowing Levee clearing Levee Repairs 2,585LF completed Culvert & Discharge Pipes -50 inspections completed 1 repair completed Mitigation Planting - 1,260LF completed Unacceptable deficiencies Correcting unresolved deficiencies from 2010 & 2013 CEI s Near- term Actions Develop Asset Management System Confirm Asset Inventory Complete develop of Asset Management System Develop annual maintenance schedule Perform annual condition assessment Vegetation Maintenance Access Road Mowing Levee clearing Develop Invasive Species Control plan Levee Repairs - 970LF scheduled Culvert & Discharge Pipes 1 inspections - scheduled 5 repairs - scheduled Mitigation Planting - 2,090LF scheduled Unacceptable deficiencies See Deficiency Action Plan address unresolved items Plan & schedule correction of 2015 CEI deficiencies Complete condition assessment (winter 2016/2017) Action Plan Outline - DRAFT 17

18 Mid-term Actions Implement Asset Management System Culvert & Discharge Pipes Biennial Inspections, 2017, 2019, 2021 Video Inspection 2020 Address CEI identified deficiencies - Biennial Long-term Actions Culvert & Discharge Pipes Biennial Inspections, 2017, 2019, 2021 Video Inspection 2025, 2030 Address CEI identified deficiencies - Biennial Programmatic Actions (ongoing) Develop annual maintenance schedules/priorities Perform Annual Condition Assessments Vegetation Management (SOPs) Access road mowing Levee Inspection Invasive Species Control Silt Bench Mapping Levee Planting Program Develop & implement program Monitoring Elements rated as Minimally Acceptable Mitigation Elements Levee Repair/Rehabilitation sites Action Plan Outline - DRAFT 18

19 Interim Risk Reduction Measures Plan This section outlines how levee deficiencies will be addressed with structural and non-structural activities that reduce flood risks, while maintenance work and capital projects are being completed. (See, Chapter 6 - Interim Risk Reduction Measures Plan ) The plan is focused on risk reduction measures that reduce flood risk to life safety, due to unacceptable deficiencies, including a discussion of emergency action plans; evacuation plans; communication efforts; flood fight capabilities including materials and equipment availability, and flood monitoring. Flood risk has been evaluated using most recent 100-year flood recurrence inundation maps. Additionally, this approach relies upon the findings in the RFHMP URS Risk Analysis Study (2011), USACE General Investigation fragility analysis, USACE Levee Screening Program, and empirical data collected through SWM levee condition assessments. (See Chapter X, Risk Assessment Report ) All structural and nonstructural risk reduction measures were evaluated according to USACE defined IRRM evaluation criteria (USACE Engineering and Construction Bulletin ) for the purpose of establishing relative priorities between risk reduction measures. The Pierce County SWM Emergency Manual and Pierce County Comprehensive Emergency Management Plan and Department of Emergency Management standard operating guidelines are incorporated as nonstructural measures establishing proper protocols for responding to flood emergencies. Phasing and Sequencing Interim Risk Reduction Measures represent an important step in an ongoing, adaptive risk management process that recognizes the dynamic nature of flood risk. Prevention of loss of life is paramount, followed by the prevention of losses to economic and ecological resources. The unique attributes of each levee system will determine the mix of risk reduction measures to be applied to the given levee segment. The intent is to employ appropriate level IRRMs as the SWIF is implemented over time as improvements are made to the levee system to increase their resiliency to withstand the forces of the river resulting in a reduced need for IRRM. In some cases, there may be a delay in levee maintenance or the funding for a capital improvement, in which case an interim risk reduction measure may be needed. It may be necessary to institute additional monitoring as an interim risk reduction measure, if a specific levee improvement project is delayed. Action Plan Outline - DRAFT 19

20 Interim Risk Reduction Measure (IRRM) Evaluation Matrix Measure Prioritization Factors a. Reduce Inundation b. No Life Safety Risk Increase c. No adverse Impacts to Levee d. Detection Confidence e. Notification Confidence f. Warning Time & Evacuation g. Reduce Loading h. Public Trust i. Problem Understanding j. Permanent Solutions k. Other Project Benefits l. Cost Effectiveness m. Social/Environmental Impacts 1. Annual Maintenance Program S 2. Increase Erosion Protection at Toe S 3. Increase Resilience to Overtopping S 4. Evaluate Internal Drainage Features S 5. SMRRT S 6. Comprehensive Floodplain Management NS 7. Engineering Investigations NS 7. Flood Warning & Emergency Evacuation Plan NS 8. Flood Emergency Drills or Exercises NS 9. Pre-position Emergency Supply NS Legend: Factor is well addressed by this measure Structural S Factor is marginally addressed by this measure Non Structural NS Factor is not addressed by this measure Type in Formulation and Prioritization Factors here from the insert below (10 pt.). Action Plan Outline - DRAFT 20

21 Action Plan Outline - DRAFT 21

22 Capital Maintenance Program This section presents a focused approach to building increased resiliency into the levee system to reduce risk over time, through a capital maintenance program. Capital Maintenance generally involves projects that are beyond the scope of typical maintenance and repair work. The Capital Maintenance Program is an approach to building resiliency into the levee system through adaptive management informing the SWIF where level of risk and consequence is highest. This category of maintenance work consist of the same general work as that conducted for routine maintenance but may fall into the capital maintenance category when two primary elements are present: increased project magnitude and increased cost. Capital maintenance work is conducted within the maintenance baseline, and typically results in increased performance and resiliency of the levee structure to withstand the forces of the river. A river levee section that functioned well for decades may be heavily damaged due to river channel movement leading to increased flow along a levee segment. Refinements to the original design may be necessary to address changing site conditions that could result in a deterioration of performance of the structure. This may include refinements to the original structure that are intended to improve the functionality of the facility. Maintenance refinement includes the following general categories of maintenance activities: Placement of larger toe and face rock Replacing a launch able toe with an embedded toe structure Re-sloping the water-ward face to increase levee stability and to provide additional flow capacity. Alternative solutions incorporating bioengineering may be implemented if conditions are right. The use of bioengineering techniques, engineered logs jams, as well as other applicable technologies may be employed as deemed appropriate for the specific levee segment. Phasing and Sequencing of Corrective Actions Capital Maintenance projects will address the risk assessment work identified in Chapter 5 Risk Assessment Report. The Risk Assessment Report chapter compiles engineered geotechnical analysis provided from several sources including the USACE Levee Screening Reports, and on-going fragility analysis work. It also includes empirical data collected over time from records identifying areas of recurring damage. Lastly, it includes ongoing observations from our Levee Asset Management Program (AMP) condition assessments. Action Plan Outline - DRAFT 22

23 Along with routine maintenance work, Capital Maintenance projects will typically be prioritized as a Near-Term or, Mid-Term maintenance objectives. Sites identified as a high risk (those site exhibiting a high probability of failure along with high consequence if failure does occur) will be given the highest priority. Sites with deficiencies that pose a moderate risk (those sites exhibiting a moderate probability of failure along with moderate to low consequence if failure does occur will not be corrected, but will be monitored until such time the deficiencies present elevate the risk level to high. (See SWIF Priority Ranking Worksheet, Table XX) Insert: Capital Maintenance Plan Decision Matrix Todd Capital Improvement Program This section discusses a suite of capital flood risk reduction projects to be implemented through the Capital Improvement Program (CIP) section as identified in the Pierce County Rivers - Flood Hazard Management Plan (RFHMP), adopted 2013; and the Flood Control Zone District - Comprehensive Plan of Development (CPOD), adopted The CPOD, based on the RFHMP, recommends capital projects and other actions that the FCZD and its partners, including Pierce County, can take to address river flooding and channel migration risks. Each year both the FCZD and SWM develop a six-year CIP plan that identifies capital projects and other actions to fund each year; along with proposed funding for projects in future years (i.e. USACE General Investigation underway.) These plans complement one another, working to coordinate a list of riverine capital improvement projects that will be implemented through both the Pierce County Surface Water Management annual budget and the Flood Control Zone District annual budget. The RFHMP recommended thirty-two capital projects, including floodplain acquisition (to address repetitive flood loss and for anticipated future construction), setback levees, and other flood risk reduction actions. As priority projects are completed, new projects are added to both the FCZD and SWM s CIP for funding and implementation. The list of priority projects are found in Appendix XX.x. Phasing and Sequencing of Corrective Actions Pierce County s flood and channel migration hazard management activities will be planned and implemented in close cooperation with cities, counties, tribes, state and federal agencies (e.g., resource agencies, public agencies with infrastructure) and salmon recovery lead entities. Capital projects are prioritized based on the level of flood risk, benefit, cost-effectiveness over the life of the plan or facility, and benefit to habitat. Action Plan Outline - DRAFT 23

24 Preliminary prioritization of capital projects listed in the FHMP was carried out by scoring the projects based on eight criteria, as follows: 1. Existing land use of affected area (consequences) 2. Severity of potential flood or channel migration impact 3. Spatial area of impact (consequences and severity) 4. Frequency of flood or channel migration occurrence 5. Project effectiveness 6. Benefit-cost analysis of project 7. Multiple project benefits 8. Partnerships and opportunity Those capital improvement projects that have funding allocated and are underway for construction are considered to be Near-term projects. Capital improvement projects included on the SWM 6-year CIP and are considered to be Mid-term projects. Those capital improvement projects that are further out (beyond 2021) are considered to be Long-term capital projects; typically due to property acquisition and funding constraints. Long-term capital projects also include the list of levee setback projects developed through the 2008/2014 Levee Setback Feasibility Study, referenced in the FHMP. Most of the long-term capital improvement projects are dependent upon grants or coordination with other jurisdictions. The Flood Control Zone District is currently setting aside a portion of the annual budget to fund projects identified as part of the USACE General Investigation Study. As funds accrue, this allows the District to eventually direct funds to these larger capital projects when opportunities arise often dependent upon a number of funding variables needed to implement the project. This is referred to as an Opportunity Fund that is dispersed proportionately based on the size of the jurisdiction. In addition, the FCZD allocates 15 percent of their annual budget to fund maintenance of flood risk reduction facilities performed by SWM. The FCZD also sets aside a portion of their annual budget for local jurisdictions to utilize as they seem fit that may include urban stormwater control projects as well as riverine flood control type projects. A listed objective of the FHMP is to identify opportunities to set back existing river management facilities (levees and revetments) further from the river edge and associated buffers to increase flood conveyance and storage, reconnect previously disconnected floodplain, improve aquatic habitat, and allow natural riverine processes to occur. Subsequently, Pierce County has prepared a Setback Feasibility Study , updated 2014; listing opportunities for levee setback projects. Projects were prioritized based on a formula that considered benefit to flood risk reduction and habitat. The majority of these projects are heavily dependent upon grants with funding unclear at this time. The department has initiated land acquisition for several of the levee setback projects in areas where there has been repetitive flood loss as an interim risk reduction measure. Action Plan Outline - DRAFT 24

25 Capital Improvement Projects The following table lists the capital improvement projects identified within the RFHMP and CPOD directly associated with PL84-99 levee segments. (See Chapter 2, Map X.x) Map # Levee Segment Name River Mile Range RFHMP CIP Projects Action Schedule Nisqually Park ** (1,2) Engineered Log Jam Mid-term NR 64.5 to Control 3 North Levee Road (1,2) PR 3.0 to 8.1 Setback Long-term 6 River Grove PR 11.0 to Flood Wall and Berm Long-term 10 McMillin PL 15.7 to Gravel Removal Long-term 11 Bower/Parker PL to 17.5 Setback Long-term 13 Calistoga *** (2) PR 19.7 to Setback Near-term Ford Gravel Removal/ Long-term 18 PR 22.5 to 24.8 Setback Neadham Road Land Acquisition/ Mid-term to 27.0 Revetment 21 Riddell CL 0.0 to 1.7 Setback Long-term Bridge St. (1,2) Bank Stabilization / 23 CL 3.05 to 3.70 Flow Deflection Alward Segment (1,2)** Mid-term 26 CL 6.55 to 8.26 Land Acquisition Alward Segment (1,2) ** Land Mid-term 27 CL 5.95 to 6.36 Acquisition/Setback 28 Potelco ** WL 4.9 to 6.2 Setback Levee Mid-term Total ** Acquisition, Design or Construction Underway; *** Completed; Funding: 1.-(6-Year C.I.P), 2.- (FCZD) Current Status of capital projects underway or completed: Nisqually Park Engineered Log Jam (NR 64.4 to 65.4) shared funding coming from Pierce County, Flood Control Zone District. Project schedule for construction Calistoga Levee Segment (PR 19.7 to 21.25): The Calistoga Setback Levee project situated along the Puyallup River was sponsored by City of Orting, with shared funding from numerous sources including WA State grants, Pierce County and the Flood Control Zone District. The Calistoga Levee Setback on the Puyallup River was constructed in 2014, proceeding with an eligibility review by the Corps and FEMA accreditation. Potelco Levee Segment (WL 4.9 to 6.2): The Countyline Levee Setback project situated along the White River - Potelco Levee segment, will be constructed by King County (2016/2017), with shared funding coming from numerous sources including Pierce County. The Countyline Setback project will not be enrolled in the PL84-99 program, replacing the currently enrolled Potelco Levee along the White River. Alward Levee Land Acquisition/Setback ( ) - Land acquisition underway for construction of a levee setback project. Funding from Pierce County and Flood Control Zone District. Action Plan Outline - DRAFT 25

26 Funding and Implementation Overview This chapter summarizes funding and implementation of the Pierce County System Wide Improvement Framework (SWIF) Plan. SWIF Implementation is dependent upon appropriate level funding to address identified levee deficiencies, levee maintenance, and capital improvements necessary to improve the PL84-99 system of levees over time. The Pierce County Rivers Flood Hazard Management Plan (FHMP) identified more than $400 million needed flood risk reduction projects and programs. Implementation of the SWIF will be subject to funding limitations, programmed over the next 20 years ( ). Funding aligned to implementation of the SWIF is focused on resolving: PL deficiencies are prioritized for correction by focusing on correcting the deficiencies or system wide improvements that pose the greatest risk to life safety and critical infrastructure first; as funding is appropriated. A goal of this SWIF plan is to resolve all PL deficiencies through routine maintenance, capital maintenance, a capital improvement project, or as engineering analysis determines the deficiency to be acceptable. Structural and non-structural interim risk reduction measures will be implemented as needed, to reduce risks in locations where a capital project or maintenance action is needed, but implementation is delayed. Note: Implementation funding for the SWIF is provided within current budget constraints. Funding Sources This section provides an overview of the funding sources for implementation of the SWIF. Funds for levee maintenance and capital improvements are typically provided from a variety of sources, including: Pierce County Surface Water Management fees; Pierce County Flood Control Zone District fees; Real Estate Excise Tax; other leveraged state and federal grant and disaster assistance funds. Funding - Surface Water Management, SWM Overview The Pierce County Council created the SWM Utility in 1998 to provide services to residential and business customers in unincorporated Pierce County. SWM is funded by a dedicated utility service charge paid by property owners across unincorporated Pierce County. Annually, the service charge generates approximately $19 million annually. Additionally, SWM is partially funded by the REET River Fund, which is derived from a portion of the first one quarter of one percent tax imposed on the sale of real property situated in the unincorporated areas of Pierce County. The monies are used for river improvement capital projects as identified in the Rivers Action Plan Outline - DRAFT 26