12/08/23
Bahadur Singh
Bahadur Singh Digitally signed by Bahadur Singh
Date: 2023.12.08 13:53:00 -08'00'
Kenneth J. Kochever, PE
X 1/8/24
Site A
Site B
SITE
LOCATION MAP
ALAMEDA COUNTY, CA
EO - Contract
6 12
LTP SLN 00 1
City of San Leandro
4 EA Road Closed signs 159.00 636.00
4 EA Sign braces 58.00
4 EA Flagstands 159.00
15 EA Type 1 barricades 52.46
32 LF Chain link fence 190.06
375 HRS Labor 120.00
375 HRS Truck pick up 21.81
500 EA Sandbags 1.00
1000 LF Rope 0.60
40000 SF Plastic Sheeting 0.50
232.00
636.00
786.90
6,081.92
45,000.00
8,178.75
500.00
600.00
20,000.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
82,651.57
At both sites A and B, plastic sheeting, weighted with sandbags was installed on the hillsides to prevent further erosion damage and safety barricades were installed at the perimeter.
The roadway was closed to traffic. Road Closed signs and fencing were installed. 7 12
LTP SLN 00 1
City of San Leandro - Site A
1 LS Mobilization 53,000.00 53,000.00
80 LF Remove Metal Beam Guardrailing 30.00
1 EA Remove Concrete Drainage Inlet Swale 3,000.00
50 LF Remove Down Drain 78.00
200 SY Clearing and Grubbing 40.00
193 CY Excavation (roadway) 200.00
21 CY Excavation (structure pile base) 260.00
154 LF 24" Cast-In-Drilled-Hole 290.00
140 LF 24" Cast-In-Drilled-Hole (Rock Socket) 920.00
350 LF Steel Soldier Pile 148.00
294 LF 24" Cast-In-Drilled-Hole Concrete (Soldier Pile) 330.00 309 SF Concrete Lagging 105.00
48 SY Geocomposite Drain 112.00
1 EA Concrete Drain Inlet 4,200.00
70 LF HDPE Downdrain 210.00
2,400.00
3,000.00
3,900.00
8,000.00
38,600.00
5,460.00
44,660.00
128,800.00
51,800.00
97,020.00
32,445.00
5,376.00
4,200.00
14,700.00
5 CY Rock Slope Protection Class II 650.00 3,250.00
228 CY Class 2 Aggregate Base 180.00 41,040.00
80 LF Metal Beam Guardrailing 270.00 21,600.00
350 LF Pavement Striping 2.00 700.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
120 TN Hot Mix ASphalt 290.00 34,800.00
594,751.00
The work cannot be done under EO as it cannot be done in 270 days.
This repair method will be staged and constructed from the above roadway and will not require any access or easements to the adjacent downslope private property. The hillside below the newly constructed retaining structure will remain in its current condition and with minimal environmental impact to the creek below.
Betterment is less expensive than Repair In Kind, formula in cell K44 (of Betterment Justification Form) is not applicable. Repair In-Kind is more costly and access is extremely difficult. Repair in kind will require acquisition of an easement and will require extensive regulatory consultation and permitting due (predominantly) to proximity to the creek.
Sheet No: of
DAF No:
UNIT QUANTITY UNIT PRICE COST UNIT QUANTITY UNIT PRICE COST EA 1 80,000 $ 80,000 $ $ -
SF 33500 15 $ 502,500 $
Temporary Construction Easement (TCE) SF 36400 10 $ 364,000 $ LS 1 111,000 $ 111,000 $ LS 1 $ 53,000 $ 53,000
LF 80 30 $ 2,400 $ LF 80 $ 30 $ 2,400
EA 1 3,000 $ 3,000 $ EA 1 $ 3,000 $ 3,000
LF 50 78 $ 3,900 $ LF 50 $ 78 $ 3,900
SY 1425 45 $ 64,125 $ SY 200 $ 40 $ 8,000
CY 956 500 $ 478,000 $ CY - $
Benched Embankment Backfill CY 6222 500 $ 3,111,000 $ CY SY 2333 45 $ 104,985 $ SY - $ SY 1425 5 $ 7,125 $ SY
CY CY 193 $ 200 $ 38,600
CY CY 21 260 $ 5,460 $
LF LF 154 290 $ 44,660 $ LF LF 140 920 $ 128,800 $ LF LF 350 148 $ 51,800 $ LF LF 294 330 $ 97,020 $ SF SF 309 105 $ 32,445 $
SY SY 48 112 $ 5,376 $
EA 1 4,200 $ 4,200 $ EA 1 4,200 $ 4,200 $
LF 70 210 $ 14,700 $ LF 70 210 $ 14,700 $
CY CY 5 650 $ 3,250 $ CY CY 228 180 $ 41,040 $
LF 80 270 $ 21,600 $ LF 80 270 $ 21,600 $
TN 120 120 $ 14,400 $ TN 120 290 $ 34,800 $
LF 350 2 $ 700 $ LF 350 2 $ 700 $
$ - $ -
$ - $ -
TOTAL 4,887,635 $ $ 594,751
$ 50,000$ 90,000$ 40,000
$ (4,292,884)
-0.01
HydroseedMetal Beam GuardrailingPermanent EasementMobilization ExcavationGeosynthetic FabricHDPE DowndrainRock Slope Protection Class IIClass 2 Aggregate BasePavement StripingHot Mix Asphalt24" Cast-In-Drilled-Hole Concrete (Soldier Pile)Structural Concrete LaggingConcrete Drain InletGeocomposite Drain ITEM
REPAIR IN-KIND REPAIR WITH BETTERMENT
Description: Site A Reconstruct an 80 feet high hillside embankment Description:Site A Install approximately 78 linear feet of retaining structure U.S. Department of Transportation
Federal Highway Department - California Division - Title 23 - Emergency Relief LTP - SLN - 001- Betterment Justification Form (DAF)
Environmental Review (proximity to creek)Clearing and GrubbingRemove Metal Beam GuardrailingRemove Concrete Drainage Inlet and SwaleRemove DowndrainExcavation (Roadway)Excavation (Structure - Pile Base)24"Cast-in-Drilled Hole24" Cast-In-Drilled-Hole (Rock Socket)Steel Soldier Pile Cost to repair damage in the future
(with betterment)
Minor repairs/maintenance. Annual monitoring and cleaning of drainage system over a 50 year period.
BENEFIT / COST
(A Benefit-Cost Ratio of less than 1.00 doesn't necessarily mean automatic rejection.
If the Benefit-Cost Ratio is less than 1.00, a justification should be provided in the REMARKS section (provide additional pages, if necessary.)
REMARKS
Betterment is less expensive than Repair In Kind, formula in cell K44 is not applicable. Repair In-Kind is more costly and access is extremely difficult. Repair in kind will require acquisition of an easement and will require extensive regulatory consultation and permitting due (predominantly) to proximity to the creek.
Cost to repair damage in the future
(without betterment)
Standard repairs/maintenance. Annual monitoring and cleaning of drainage system over a 50 year period. Monitoring and spot reapplications of hydroseeding BENEFIT (Difference in future repair costs over equal life.) COST (Additional cost to repair the site as a result of adding the betterment.)
10 12
LTP SLN 00 1
City of San Leandro - Site B
1 LS Mobilization 112,740.00 112,740.00
900 SY Clearing and Grubbing 10.00
125 LF Remove 4' Chain Link Fence 20.00
122 LF Remove Concrete V-ditch 40.00
220 CY Remove and Salvage Rock Slope Protection 70.00
357 LF 24" Drilled Hole 300.00
613 LF 24" Cast-in-place Concrete Pile (Soldier Pile) 120.00 1462 SF Structural Concrete (Precast Concrete Lagging) 120.00 840 CY Excavation 50.00
20 CY Structure Backfill 40.00
1048 CY Rock Slope Protection Class V 320.00
465 CY Rock Slope Protection Class II 350.00
122 LF Concrete V ditch 180.00
9,000.00
2,500.00
4,880.00
15,400.00
107,100.00
73,560.00
175,440.00
42,000.00
800.00
335,360.00
162,750.00
21,960.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 0.00
0.00 1,063,490.00
The work cannot be done under EO as it cannot be done in 270 days.
This betterment repair will provide long lasting stability to the embankment and will afford continual vital structural support to the above dwellings.
The existing embankment has a history of failure. The repair installed 20 years ago failed. Similar failure is to be expected with replacement in kind, jeopardizing structural support to two structures above. A more robust betterment repair, conforming to current design standards is the preferred long term option.
Sheet No: 11 of 12
DAF No:
UNIT QUANTITY UNIT PRICE COST UNIT QUANTITY UNIT PRICE COST LS 1 40,500 $ 40,500 $ LS 1 112,740 $ 112,740 $
SY 450 10 $ 4,500 $ SY 900 10 $ 9,000 $
LF 80 20 $ 1,600 $ LF 125 20 $ 2,500 $ LF 70 40 $ 2,800 $ LF 122 40 $ 4,880 $ LF 65 25 $ 1,625 $ CY 110 70 $ 7,700 $ CY 220 70 $ 15,400 $
LF 0 - $ LF 357 300 $ 107,100 $
LF 0 - $ LF 613 120 $ 73,560 $
SF 0 - $ SF 1462 120 $ 175,440 $
CY 540 50 $ 27,000 $ CY 840 50 $ 42,000 $ CY 120 350 $ 42,000 $ CY 0 60 $ - $ CY 20 40 $ 800 $
CY 0 - $ CY 1048 320 $ 335,360 $
CY 140 350 $ 49,000 $ CY 465 350 $ 162,750 $
LF 70 180 $ 12,600 $ LF 122 180 $ 21,960 $
SY 420 25 $ 10,500 $ SY - $
SY 420 6 $ 2,520 $ SF 0 - $
LF 145 50 $ 7,250 $ LF 0 - $
LF 80 40 $ 3,200 $ LF 0 - $
SF 585 25 $ 14,625 $ SF 0 - $
$ - $ -
$ - $ -
TOTAL 227,420 $ $ 1,063,490
$ 25,000
$ 949,680$ 924,680$ 836,070
1.11 Concrete V-Ditch
REPAIR WITH BETTERMENT
Description: Site B reinstall failed rock slope protection Description: Site B Install approximately 138 feet of retaining wall, install taller rock slope protection with larger boulders to mee current design standards MobilizationRock Slope Protection Class IIRemove and Salvage Rock Slope Protection24"Drilled Hole24" Cast-in-place Concrete Pile (Soldier Pile)Structural Concrete (Precast Concrete Lagging)ExcavationStructure BackfillRock Slope Protection Class VRemove 6' Chain Link Fence top of slopeHillside Backfill The existing embankment has a history of failure. The repair installed 20 years ago failed. Similar failure is more likely with replacement in kind, jeopardizing structural support to two structures above. A more robust betterment repair, conforming to current design standards is the preferred long term option.
TCE
Cost to repair damage in the future
(with betterment)
Cost to repair damage in the future
(without betterment)
COST
BENEFIT / COST
REMARKS
BENEFIT
Minor repairs/maintenance. Monitoring and periodic clearing of V-ditch and storm drain over a 50 year (A Benefit-Cost Ratio of less than 1.00 doesn't necessarily mean automatic rejection.
If the Benefit-Cost Ratio is less than 1.00, a justification should be provided in the REMARKS section (provide additional pages, if necessary.) Substantial Repairs 50% of existing repair failed at 20 years. Assume replace 100% at 20 intervals. Also includes periodic monitoring and installation of temporary plastic sheeting weighted with sandbags U.S. Department of Transportation
(Difference in future repair costs over equal life.)
(Additional cost to repair the site as a result of adding the betterment.) Clearing and GrubbingRemove 4' Chain Link FenceRemove Concrete V-ditch LTP - SLN - 001-
Betterment Justification Form (DAF)
Federal Highway Department - California Division - Title 23 - Emergency Relief ITEM
REPAIR IN-KIND
HydroseedingInstall Chain Link FenceGeosynthetic Fabric when no RSPRepair keyway Drainage