2023 Pavement Management Program
Implementation for Alleyways
City of Redondo Beach
Public Works
415 Diamond Street
Redondo Beach, CA 90277
March 2024
17050 Bushard Street, Suite 200
Fountain Valley, CA 92708
2023 Pavement Management Program Implementation for Alleyways City of Redondo Beach
March 6, 2024
Prepared for:
City of Redondo Beach
Public Works
415 Diamond Street
Redondo Beach, CA 90277
Prepared by:
Timin Punnackal, P.E. (NV)
Senior Engineer
Luis Alberto Rocher Neri
Staff Engineer
Vivek Jha, P.E. (NJ, MD)
Associate
NCE
17050 Bushard St., Suite 200
Fountain Valley, CA 92708
(714) 848-8897
NCE Project No. 910.07.30
2023 Pavement Management Program Implementation
Table of Contents City of Redondo Beach
March 6, 2024
i
Table of Contents
1 Alleyway Network Summary.................................................................................................... 1 2 Budget Analysis ....................................................................................................................... 2
2.1 Budget Needs............................................................................................................................ 2
2.2 Budget Scenarios ...................................................................................................................... 2
2.3 Scenario 1: City’s Anticipated Budget ($330K once in year 1).................................................. 4
2.4 Scenario 2: Increase PCI to 71 ($660K to 900K per year) for 3 years. ...................................... 5
2.5 Scenario Comparisons............................................................................................................... 6 Conclusion and Recommendations....................................................................................................... 8
2.6 Recommendations.................................................................................................................... 8 List of Figures
Figure 1. PCI vs Deferred Maintenance for Scenario 1..................................................................................4 Figure 2. PCI vs Deferred Maintenance for Scenario 2..................................................................................5 Figure 3. Comparison of Annual PCI by Scenario. .........................................................................................6 Figure 4. Comparison of Annual Deferred Maintenance by Scenario...........................................................6 Figure 5. Comparison of Pavement Condition by FY 2028/29 Breakdown by Scenarios..............................7 List of Tables
Table 1. Alleyway Summary Statistics...........................................................................................................1 Table 2. Alleyway Pavement Condition Summary.........................................................................................1 Table 3. Alleyway Budget Needs. ..................................................................................................................2 Table 4. Budget Scenario Analysis Summary.................................................................................................3 Table 5. Summary of Results from Scenario 1 Analysis.................................................................................4 Table 6. Summary of Results from Scenario 2 Analysis.................................................................................5 2023 Pavement Management Program Implementation
Table of Contents City of Redondo Beach
March 6, 2024
ii
List of Appendices
Appendix A
Section Description Inventory – Average (Weighted by Area) PCI Appendix B
Maintenance and Rehabilitation (M&R) Decision Tree
Appendix C
Budget Needs
Appendix D
Scenario Results
Appendix E
Sections Selected for Treatment
Appendix F
GIS Maps
Appendix G
Quality Control Plan (QCP)
2023 Pavement Management Program Implementation
Alleyway Network Summary City of Redondo Beach
March 6, 2024
1 1 Alleyway Network Summary
The City is responsible for maintaining approximately 7.1 miles of alleyways. The alleyway network is composed primarily of asphalt concrete pavement. Table 1 summarizes the alleyway network and its overall condition.
Table 1. Alleyway Summary Statistics
Functional Class Centerline
Mileage
Weighted
Average PCI Condition
Alleyway 7.1 54 Good
Street pavements are one of the City’s most valuable assets, and the total alleyway network replacement cost is estimated to be approximately $5.5 million. This can be viewed as the value of the alleyway network and is the amount needed to fund a reconstruction of the entire paved network. It does not include related infrastructure assets such as sidewalks, markings, signs, or storm drains.
Table 2 shows the pavement condition breakdown by condition category. Approximately 15.5 percent (by area) of the alleyway network is in “Very Good” condition, 34.5 percent is in “Good” condition, 47.6 percent is in “Poor” condition, and 2.4 percent is in “Very Poor” condition.
Table 2. Alleyway Pavement Condition Summary
Condition Category PCI Range Alleyway
(%)
Very Good 70-100 15.5%
Good 51-69 34.5%
Poor 26-50 47.6%
Very Poor 0-25 2.4%
March 6, 2024
2 2 Budget Analysis
Based on the principle that it costs less to maintain pavement in good condition than it does to repair those that have failed, cost-effective PMPs employ strategies that eliminate the deferred maintenance and then maintain the pavement network with ongoing preventive maintenance. Such strategies bring the network condition to an optimal PCI that can be maintained over time.
2.1 Budget Needs
The first step in developing a cost-effective strategy is to determine, assuming an unconstrained budget, the total maintenance budget “needs” of the alleyway network, in other words the amount of funding required for each alley in the network to reach optimal condition based on the policy established in the decision tree. The costs of the treatment(s) over the analysis period were calculated by multiplying the unit cost by the pavement section area at an annual inflation rate of 5.0 percent.
The budget needs are estimated to be approximately $2.7 million over the same period as the network analysis.
Because only rehabilitation treatments are considered for alleyways, no funds are assigned for Preventive Maintenance. If the City follows this “ideal” strategy, the average network PCI will increase to 85 in the first year, and subsequently decrease to 79 by the end of the analysis period. It must be mentioned that once alleys are rehabilitated to 100 PCI, no further treatment will be performed until the PCI deteriorates below 50.
Therefore, StreetSaver® will not allocate future funding during the analysis period to the already rehabilitated alleys. Table 3 below shows the impacts of expenditures have on the alleyway network PCI, assuming an unconstrained budget.
Table 3. Alleyway Budget Needs.
Period Current After Network
Projects
Year 1 Year 2 Year 3 Total
Total Budget Needs
($K)
2,292 179 52 79 109 2,711
Rehabilitation
($K) 2,292 179 52 79 109 2,711
Preventive
Maintenance ($K) 0.0 0.0 0.0 0.0 0.0 0.0
Treated PCI 54 82 80 79 79 NA
Untreated PCI 54 51 49 47 44 NA
2.2 Budget Scenarios
Having determined the maintenance needs of the alleyway network, the next step in developing a cost-effective M&R strategy is to generate several alternative budgets and analyze “what-if” scenarios. By examining the impacts of budget "scenarios", the advantages and disadvantages of the 3 funding levels and maintenance strategies can be illustrated.
Like the street network scenarios, an annual inflation factor of 5.0 percent was used. Despite the city currently having upcoming projects, those projects are limited to arterials, collectors and residentials streets. The March 6, 2024
3 following budget scenarios were evaluated after the budget-allocated projects (previously described in the main report) as part of a 3-year analysis.
Scenario 1: City’s anticipated budget ($330K once in year 1) – The result shows that at the City’s current funding level of $330,000 applied once, the alleyways PCI is projected to decrease from 51 to 49 by the end of the analysis period. The PCI is assumed to decrease from 54 to 51 at the same time the current projects addressing arterials, collectors, and residentials take place, increase to 54 after the budget is used within year 1 of the analysis period, and subsequently decrease to 49 by the end of year 3. The cost of deferred maintenance will increase from $2.7 million to $3.2 million by the end of year 3.
Scenario 2: Increase PCI to 71 ($660K to 900K per year) for 3 years –The result shows that the City will need to spend a total of $2.4 million over 3 years to increase the network PCI to 71. Additionally, deferred maintenance will decrease from $2.7 million to $1.0 by the end of year 3.
The following table summarizes each scenario with its corresponding 3-year budget and the PCI and deferred maintenance at the end of the analysis period.
Table 4. Budget Scenario Analysis Summary
Scenario Description
Cumulative
3-year
Budget ($K)
End of year 3
Alleyways PCI Deferred
Maintenance ($K)
1 City’s Budget 330 49 3,210
2 Increase PCI to 71 2,400 71
1 1,045
1 Due to the small number of alleyways, an exact PCI value of 70 could not be achieved (StreetSaver® would only provide a PCI value of 69 or 71).
March 6, 2024
4 2.3 Scenario 1: City’s Anticipated Budget ($330K once in year 1).
This scenario primarily targets alleyways with PCI under 25. At the City’s current budget of $330K used once in first year of the analysis period, the alleyways PCI will increase from 51 to 54 in the first year and then decrease to 49 by the end of year 3. By the end of the analysis period, 20.2 percent will be in “Very Good” condition, 25.2 percent will be in “Good” condition, 40.9 percent will be in “Poor” condition, and 13.7 percent will be in “Very Poor” condition. The deferred maintenance cost will increase from $2.7 million to $3.2 million. Table 5 and Figure 1 show the results of this scenario.
Table 5. Summary of Results from Scenario 1 Analysis
Period Current After Network
Projects
Year 1 Year 2 Year 3
City’s Proposed Budget
($K)
0 0 330 0 0
Rehabilitation
($K)
0 0 330 0 0
Preventive
Maintenance ($K)
0 0 0 0 0
Deferred Maintenance
($K)
2,292 2,692 2,588 2,876 3,210
Network PCI 54 51 54 51 49
Figure 1. PCI vs Deferred Maintenance for Scenario 1.
March 6, 2024
5 2.4 Scenario 2: Increase PCI to 71 ($660K to 900K per year) for 3 years.
In this scenario, the overall network PCI is increased to 71. Due to the small number of alleyways, an exact PCI value of 70 could not be achieved (StreetSaver® would only provide a PCI value of 69 or 71). As shown in Table 6 and Figure 2 for Scenario 2, the estimated financial commitment required to accomplish this goal is $2.4 million over the 3-year analysis period. The deferred maintenance at the end of year 3 will decrease to $1.0 million ($2.2 million less than in Scenario 1). In this Scenario, 55.0 percent of the network will be in “Very Good” condition, 26.0 percent will be in “Good” condition, 19.0 percent will be in “Poor”, and 0.0 percent will be in “Very Poor” condition after 3 years.
Table 6. Summary of Results from Scenario 2 Analysis
Year Current After Network
Projects
Year 1 Year 2 Year 3
Proposed Budget
($K) 0 0 900 800 660
Rehabilitation
($K) 0 0 900 800 660
Preventive
Maintenance ($K) 0 0 0 0 0
Deferred
Maintenance ($K) 2,292 2,692 1,981 1,441 1,045
Network PCI 54 51 59 66 71
Figure 2. PCI vs Deferred Maintenance for Scenario 2.
March 6, 2024
6 2.5 Scenario Comparisons.
Figure 3 compares the annual changes in PCI for each of the scenarios. As described above, the PCI will decrease to 49 in Scenario 1, and increase to 71 in Scenario 2 by the end of year 3.
Figure 3. Comparison of Annual PCI by Scenario.
Figure 4 illustrates the changes in deferred maintenance over the 3-year analysis period for each scenario. For Scenario 1 the deferred maintenance will increase from $2.7 million to $3.2 million by the end of year 3.
Scenarios 2 will decrease from $2.7 million to $1.0 million.
Figure 4. Comparison of Annual Deferred Maintenance by Scenario.
March 6, 2024
7 Figure 5 illustrates the percent change in pavement condition for each scenario at the end of year 3. As noted previously, currently, 50.0 percent of the network is in “Very Good” or “Good” condition, and 50.0 percent is in “Poor” or “Very Poor” condition. Under Scenario 1, the portion of the network in “Good” or “Very Good” condition will decrease to 45.4 percent, while the portion of the network in “Poor” or “Very Poor” condition will increase to 54.7 percent. Under Scenario 2, the portion in “Good” or “Very Good” condition will increase to 81.0 percent, while the portion in “Poor” or “Very Poor” condition will decrease to 19.0 percent.
Figure 5. Comparison of Pavement Condition by FY 2028/29 Breakdown by Scenarios.
March 6, 2024
8 Conclusion and Recommendations
In summary, the City of Redondo Beach has a substantial investment of $5.5 million in the pavement network.
Overall, the pavement network is in “Good” condition with a PCI of 54. The City’s existing budget (Scenario 1) of $330K applied once is expected to reduce the alleyways PCI from 51 (after the first 2 year prior to analysis) to
49. In Scenario 2, PCI is increased to 71 over 3 years with an investment of $2.4 million.
2.6 Recommendations
NCE recommends that the City consider the following:
1. Pavement Budget - Increase the funding level to improve the network condition, combat high treatment costs from inflation, and reduce the deferred maintenance growth (Scenario 2).
2. Additional Funding - Actively pursue additional pavement funding sources in order to address the gap between the City’s existing funding and the recommended scenario.