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Drainage Assessment for
2732 Aberdeen Ave. N. SFR
Renton, WA
Renton, Washington – King County
July 7, 2021
Prepared by: Dean A. Furr, P.E.
FES Project #18055
07/07/2021
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INREENOTR46937
EXHIBIT 10
RECEIVED
10/25/2021 BGillia
PLANNING DIVISION
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DRAINAGE EVALUATION
The Proposal is to short plat the parcel into two lots, maintain the existing house on Lot
A and construct a new single family residence on Lot B. The project is located in the
EDMONDS AVE NE / NE 12TH ST Neighborhood of Renton on the east side of I -405.
Specifically, it is located at 2732 Aberdeen Ave Ne. Currently, the corner parcel has a
single family home, detached garage and asphalt driveway which takes access from
Aberdeen Ave NE. The site can be characterized as flat with vegetation typical of urban
landscaping. A tree line along the south property line will be protected. There are no
critical areas near or adjacent to the site. See the following area breakdown table and
supporting exhibit at the end of this report..
EXISTING CONDITIONS sf
PARCEL (after
dedication) 15,309.7
DISTURBED AREA 15,309.7
EXISTING IMP 3,591.8
HOUSE AND GARAGE 1,540.0
DRIVEWAY 2,051.8
EXISTING PERVIOUS 11,717.9
Existing Conditions area breakdown
Site soils analysis was performed by Cobalt Geosciences, Stormwater Feasibility
Evaluation, dated January 8, 2019. The site evaluation consisted of four hand borings
(HB-1 through HB-4) to a depth of 4ft. The report analysis the soils for infiltration and
recommended a factored rate of 2.6 inches/hour. The is project is subject to simplified
drainage review and therefore will use the geotech nical s recommendation of medium
sands when sizing infiltration facilities per the 2017 City of Renton SWDM, Appendix
C.2.2.3 and 4. The infiltration evaluation report is attached to this report.
The Proposal is to short plat the parcel into two lots, maintain the existing house on Lot
A and construct a new single family residence on Lot B. Both lots will be accessed by a
12ft wide alley along the south property line. The project is within the R -8 zone, see the
following table as well as the following Lots breakdown table.
ZONE R-8
BUILDING COVERAGE MAX 50%
IMPERVIOUS COVERAGE MAX 65%
Table 1: Zone impervious table
LOT A
DEVELOPED (ON-SITE) sf MAX
ALLOWED (SF)
LOT AREA 7,762.4
IMPERVIOUS TOTAL 2,505.9 5,045.6
EXIST. HOUSE (ROOF) 1,138.3 3,881.2
DRIVEWAY/ALLEY 1,218.3
EXHIBIT 10
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WALKWAY 149.4
PERVIOUS (AMENDED) 5,256.5
Table 2: Lot A Developed Conditions
The previous table it shows that Lot A recommended development (impervious)
complies with zoning maximums.
The following table shows the New+Replaced Impervious area for Lot A.
NEW AND REPLACED Sf
NEW IMPERVIOUS 585.3
REPLACED IMPERVIOUS 782.3
NEW + REPLACED 1,367.7
Table 3: Lot A New and Replaced impervious area
LOT B
DEVELOPED (ON-SITE) SF MAX ALLOWED (SF)
LOT AREA 7,547.2
IMPERVIOUS TOTAL 4,335.8 4,905.7
HOUSE (ROOF) 3,024.0 3,773.6
DRIVEWAY/ALLEY 1,235.0
WALKWAY 76.7
PERVIOUS (AMENDED) 3,211.4
Table 4: Lot B Developed Conditions
The previous table shows that Lot B recommended development (impervious) complies
with zoning maximums.
The following Table shows the New+Replaced Impervious area for Lot B.
LOT B
NEW AND REPLACED Sf
NEW IMPERVIOUS 3,780.6
REPLACED IMPERVIOUS 555.2
NEW + REPLACED 4,335.8
Table 5: Lot B New and Replaced impervious area
Referencing Figure 1.1.2.A “Flow Chart for determining type of drainage review required”
it can be shown that Simplified Drainage Review is required .
EXHIBIT 10
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The project proposes to comply with the 2017 City of Renton SWDM, Appendix C for
stormwater mitigation using ON-SITE BMP’s. The lot is less than 22,000sf and therefore
BMP’s will be addressed in order.
1. Full Dispersion is not feasible because there is insufficient vegetated flow path.
2. Full Infiltration is feasible, based on the available infiltrative soils as determined
in the geotechnical engineer’s report. The report suggests that medium sand
soils be used when evaluating infiltration facilities (i.e. trenches and/or drywell)
3. No other BMPs will be evaluated.
EXHIBIT 10
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The project proposes to utilize Drywells per C.2.2.4 to fully infiltrate the runoff from the
targeted impervious surface s. The Geotech recommended using medium sands
therefore the drywell gravel volume will be based on 90cf of gravel per 1,000sf of
impervious area.
LOT A
The lot impervious area consists of the existing house roof area, driveway and the
portion of the alley on the lot. See the following table for drywell sizing.
LOT A DRYWELL SIZING
Total Imp area (sf) 1,138.26
DRYWELL #1 REQ’D (EXIST HOUSE+ALLEY) DESIGNED
EXIST. ROOF (SF) 1,138.26
ALLEY/SW/DW 1,367.66
Volume reqd (cf) 225.53 226.9
d(ft) 8.50 9.0
A (sf) 56.72 63.59
h (ft) 3.98 4.0
Table 6: Lot A drywell sizing table
The project is only required to mitigate for the New+Replaced impervious area, however,
will provide a drywell larger than required, which will mitigate all of the impervious area.
A 9.0ft diameter x 4.1ft deep drywell will be constructed as Drywell #1.
LOT B
The lot impervious area consists of a new SFR, driveway, sidewalk and paved alley.
The areas will be separated into the north and south and will be mitigated by an
appropriately sized drywell. See the following tables.
LOT B DRYWELL SIZING
Total Imp area (sf) 4,335.77
DRYWELL #2 REQUIRED (NORTH) DESIGNED
N HALF ROOF (SF) 1,512.00
Volume reqd (cf) 136.08 153.9
d (ft) 6.60 7.0
A (sf) 34.19 38.47
h (ft) 3.98 4.0
DRYWELL #3 (SOUTH)
S HALF ROOF (SF) 1,512.00
ALLEY/SW/DW 1,311.77
Volume reqd (cf) 254.14
d (ft) 9.00 -
A (sf) 63.59 -
h (ft) 4.00 -
Table 7: Lot B drywell sizing
EXHIBIT 10
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It is proposed to construct a 7ft diameter x 4ft deep drywell will be constructed, drywell
#2 for the north half of the roof area .
It is proposed to construct a 9ft diameter x 4ft deep drywell, Drywell #3, for the south half
of the roof and the driveway/alley paving.
OFF-SITE IMPROVEMENTS
The project is required to construct off -site frontage improvements along Aberdeen Ave.
NE and NE 28th St. These improvements include curb, gutter and sidewalk as well as an
8’ landscape strip.
EROSION CONTROL EVALUATION
In order to prevent erosion and trap sediments within the project site, the following BMPs
will be used approximately as shown in the ESC details on the CSWPP plan:
• Clearing limits will be marked by fencing or other means on the ground.
• The driveway will be constructed and graveled immediately. A rocked construction
entrance will be placed at the end of the driveway. Dispersion trenches will be placed
according to flow control requirements.
• Cleared areas accepting sheet flow from the dri veway and parking area will be
seeded and mulched.
• Runoff will not be allowed to concentrate and no water will be allowed to point
discharge onto the slopes.
• Silt fencing will be placed along slope contours at the downslope limit of clearing.
• Mulch will be spread over all cleared areas of the site when they are not being
worked. Mulch will consist of air-dried straw and chipped site vegetation.
EXHIBIT 10
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EXHIBITS
1. EXISTING CONDITIONS EXHIBIT
2. DEVELOPED CONDITIONS EXHIBIT
3. REPLACED AND NEW EXHIBIT
4. DRYWELL DETAIL
EXHIBIT 10
DocuSign Envelope ID: 161A4F20-D494-466C-B2E0-C93C3D6DC51E
UPUPUPUPUPUPUPUPUTUTUTUTUTUTUTUTUP UP UP UP UP UP UP UPUTUTUTUTUTUTUTUTUT
RRTOTAL DISTURBED AREA
15,309.7 SF
EX HOUSE
937.4 SF
EX PATIO
433.1 SF
EX GARAGE
898.0 SF
EX DRIVE
1124.5 SF
EX WALK
79.3 SF
N
ph 206.890.8291
4715 142nd Pl. SW #B,
Edmonds, WA 98026
DAF
8/15/2019
18055 2732 ABERDEEN AVE NEEXISTING BASIN EXHIBITEXISTING IMPERVIOUS
EXHIBIT 10
DocuSign Envelope ID: 161A4F20-D494-466C-B2E0-C93C3D6DC51E
RDRDRD RD RD RDRDRDRD RD
RDUPUPUPUPUPUPUPUPUTUTUTUTUTUTUTUTUP UP UP UP UP UP UP UP
UT UT UT UT UT UT UT UT UT
DS
RDRD RD
RDRDRD RD
RRRDDS DS
DS
HOUSE
1138.3 SF
DRIVEWAY
1218.3 SF
PROP HOUSE NORTH
1512.0 SF
PROP HOUSE SOUTH
1512.0 SF
PROP
DRIVE
1235.0 SF
WALK
149.4 SF
WALK NORTH
76.7 SF
N
ph 206.890.8291
4715 142nd Pl. SW #B,
Edmonds, WA 98026
DAF
8/15/2019
18055 2732 ABERDEEN AVE NEDEVELOPED CONDITIONS EXHIBITNEW IMPERVIOUS TO NORTH
NEW IMPERVIOUS TO SOUTH
DRYWELL SIZING
DRYWELL
#1
DRYWELL #2
DRYWELL
#3
EXHIBIT 10
DocuSign Envelope ID: 161A4F20-D494-466C-B2E0-C93C3D6DC51E
UPUPUPUPUPUPUPUPUTUTUTUTUTUTUTUTUP UP UP UP UP UP UP UP
UT UT UT UT UT UT UT UT UT
DS
RRDS DS
DS
N
ph 206.890.8291
4715 142nd Pl. SW #B,
Edmonds, WA 98026
DAF
8/15/2019
18055 2732 ABERDEEN AVE NEDEVELOPED CONDITIONS EXHIBITEXISTING IMPERVIOUS
(HOUSE+GARAGE)
2036.3 SF
EXISTING IMPERVIOUS
(DRIVEWAY+WALK+PATIO)
1602.5 SF
REPLACED IMPERVIOUS
782.3 SF
EXHIBIT 10
DocuSign Envelope ID: 161A4F20-D494-466C-B2E0-C93C3D6DC51E
PLAN
HOUSE
1 1/2" - 3" WASHED
DRAIN ROCK
HOUSE
FLOW
2% SLOPE (1% MIN.)
4" CAPPED PVC OR GRATE INLET
AT SURFACE FOR OBSERVATION
ROOF DOWNSPOUT
OVERFLOW
SPLASH BLOCK
FINE MESH SCREEN, SS
304 10x10 OR SIMILAR
6" MIN. DIA.SCH 40 PVC
PIPE PER ASTM D1785
SIDES AND TOP OF ROCK LINED WITH
NON-WOVEN GEOTEXTILE FOR
SEPARATION PER WSDOT 9-33.2(1)
CATCH BASIN
YARD DRAIN)
ROOF
DOWNSPOUT MIN. 12" X 12"
CATCH BASIN
YARD DRAIN)
DRYWELL
SOLID LID
OR GRATE
MIN. 50 GALLON PLASTIC
OR CONCRETE DRYWELL
15' MIN. AS REQUIRED,
SEE NOTE 1 VARIES
12'' MIN.
TOPSOIL
12" MIN. ABOVE SEASONAL
HIGH GROUNDWATER OR
HYDRAULICALLY
RESTRICTIVE LAYER
5' MIN. SETBACK FROM
BUILDING
12'' MIN.
SUMP
24"
MIN.
24"
MIN.
GENERAL NOTES:
1.WHEN LOCATED IN COARSE SANDS AND COBBLES, DRYWELLS MUST CONTAIN A VOLUME OF GRAVEL EQUAL TO OR GREATER THAN 60 CUBIC FEET PER 1,000 SQUARE
FEET OF IMPERVIOUS SURFACE SERVED. WHEN LOCATED IN MEDIUM SANDS, DRYWELLS MUST CONTAIN AT LEAST 90 CUBIC FEET OF GRAVEL PER 1,000 SQUARE FEET
OF IMPERVIOUS SURFACE SERVED.
2.SPACING BETWEEN DRYWELLS SHALL BE A MINIMUM OF 10 FEET.
3.REGULAR MAINTENANCE INCLUDING CATCH BASIN (YARD DRAIN) CLEANING (EVERY 6 MONTHS MINIMUM) IS ESSENTIAL TO THE LONG-TERM FUNCTIONING OF
DRYWELLS.
4.CONNECT INLET PIPE TO CONCRETE DRYWELL USING PRECAST HOLE OR CORE DRILLED HOLE.
5.SEE CONSTRUCTION PLANS FOR SPECIFIC PROJECT REQUIREMENTS.
48" MIN. DIA.
SPLASH BLOCK
SECTION
48" MIN.
NOTES:
1.DRYWELLS MUST BE SET BACK AT LEAST 15 FEET FROM
BUILDINGS WITH CRAWL SPACE OR BASEMENT ELEVATIONS THAT
ARE BELOW THE OVERFLOW POINT OF THE DRYWELL.
DRYWELL PLAN AND SECTION
STD. PLAN - 263.00
PUBLIC WORKS
DEPARTMENT
APPROVED:
DATEGreggZimmerman
Public Works Administrator
UNLESS OTHERWISE NOTED, DRAWING IS NOT TO SCALE (NTS)
DocuSign Envelope ID: 6EECF5B6-602A-4E4A-B436-A317AA638878
9/28/2018 | 9:45 AM PDT
EXHIBIT 10
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SPECIAL REPORTS AND STUDIES
Stormwater Feasibility Evaluation, Proposed Two -Lot Development 2732 Aberdeen
Avenue, Renton, Washington, by Cobalt Geosciences, dated January 8, 2019
EXHIBIT 10
This report is write protected and cannot be appended to this document and will
be submitted as a separate document
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COST ESTIMATE
EXHIBIT 10
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Planning Division |1055 South Grady Way – 6th Floor | Renton, WA 98057 (425) 430-7200Date Prepared: Name:PE Registration No:Firm Name:Firm Address:Phone No.Email Address:Project Name: Project Owner:CED Plan # (LUA):Phone:CED Permit # (U):Address: Site Address:Street Intersection:Addt'l Project Owner:Parcel #(s):Phone:Address: Clearing and grading greater than or equal to 5,000 board feet of timber? Yes/No:NOWater Service Provided by:If Yes, Provide Forest Practice Permit #:Sewer Service Provided by: SITE IMPROVEMENT BOND QUANTITY WORKSHEETPROJECT INFORMATIONCITY OF RENTONCITY OF RENTON1 Select the current project status/phase from the following options: For Approval - Preliminary Data Enclosed, pending approval from the City; For Construction - Estimated Data Enclosed, Plans have been approved for contruction by the City; Project Closeout - Final Costs and Quantities Enclosed for Project Close-out Submittal253.293.1578Engineer Stamp Required (all cost estimates must have original wet stamp and signature)Clearing and GradingUtility ProvidersN/AProject Location and DescriptionProject Owner InformationAberdeen Ave. 2-Lot Shor PlatRenton, WA 98056334390-1400Balraj Mangat##-######253.293.15787/20/2021Prepared by:FOR APPROVALProject Phase 1furrengineering@gmail.comDean A. Furr46937Furr Engineering Services4715 142nd Pl SW #B206.890.82912732 Aberdeen Ave.2732 Aberdeen Ave. NEInderjit MangatAberdeen Ave. and NE 28th St.########PO Box 6058Abbreviated Legal Description:LOT A, CITY OF RENTON LOT LINE ADJUSTMENT, NO. LUA-00-011-LLA, AS RECORDED UNDER RECORDING NUMBER 2000601900016, RECORDS OF KING COUNTY, WASHINGTON.Kent, WA 98064Page 1 of 13Ref 8-H Bond Quantity WorksheetSECTION I PROJECT INFORMATIONUnit Prices Updated: 06/14/2016Version: 04/26/2017Printed 7/20/2021EXHIBIT 10
DocuSign Envelope ID: 161A4F20-D494-466C-B2E0-C93C3D6DC51E
CED Permit #:########UnitReference #PriceUnitQuantity CostBackfill & compaction-embankmentESC-16.50$ CY Check dams, 4" minus rockESC-2SWDM 5.4.6.380.00$ Each Catch Basin ProtectionESC-335.50$ Each10355.00Crushed surfacing 1 1/4" minusESC-4WSDOT 9-03.9(3)95.00$ CY DitchingESC-59.00$ CY Excavation-bulkESC-62.00$ CY50100.00Fence, siltESC-7SWDM 5.4.3.11.50$ LF248372.00Fence, Temporary (NGPE)ESC-81.50$ LF Geotextile FabricESC-92.50$ SY Hay Bale Silt TrapESC-100.50$ Each HydroseedingESC-11SWDM 5.4.2.40.80$ SY Interceptor Swale / DikeESC-121.00$ LF Jute MeshESC-13SWDM 5.4.2.23.50$ SY Level SpreaderESC-141.75$ LF Mulch, by hand, straw, 3" deepESC-15SWDM 5.4.2.12.50$ SY Mulch, by machine, straw, 2" deepESC-16SWDM 5.4.2.12.00$ SY Piping, temporary, CPP, 6"ESC-1712.00$ LF Piping, temporary, CPP, 8"ESC-1814.00$ LF Piping, temporary, CPP, 12"ESC-1918.00$ LF Plastic covering, 6mm thick, sandbaggedESC-20SWDM 5.4.2.34.00$ SY25100.00Rip Rap, machine placed; slopesESC-21WSDOT 9-13.1(2)45.00$ CY Rock Construction Entrance, 50'x15'x1'ESC-22SWDM 5.4.4.11,800.00$ Each11,800.00Rock Construction Entrance, 100'x15'x1'ESC-23SWDM 5.4.4.13,200.00$ Each Sediment pond riser assemblyESC-24SWDM 5.4.5.22,200.00$ Each Sediment trap, 5' high berm ESC-25SWDM 5.4.5.119.00$ LF Sed. trap, 5' high, riprapped spillway berm section ESC-26SWDM 5.4.5.170.00$ LF Seeding, by handESC-27SWDM 5.4.2.41.00$ SY Sodding, 1" deep, level groundESC-28SWDM 5.4.2.58.00$ SY Sodding, 1" deep, sloped groundESC-29SWDM 5.4.2.510.00$ SY TESC SupervisorESC-30110.00$ HR Water truck, dust controlESC-31SWDM 5.4.7140.00$ HR UnitReference #PriceUnitQuantity Cost EROSION/SEDIMENT SUBTOTAL:2,727.00SALES TAX @ 10%272.70EROSION/SEDIMENT TOTAL:2,999.70(A)SITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR EROSION & SEDIMENT CONTROLDescription No.(A)WRITE-IN-ITEMS Page 2 of 13Ref 8-H Bond Quantity WorksheetSECTION II.a EROSION_CONTROLUnit Prices Updated: 06/14/2016Version: 04/26/2017Printed 7/20/2021EXHIBIT 10
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CED Permit #:########ExistingFuture PublicPrivateRight-of-WayImprovementsImprovements(D) (E)DescriptionNo. Unit PriceUnitQuant.CostQuant.CostQuant.CostQuant.CostGENERAL ITEMS Backfill & Compaction- embankmentGI-16.00$ CYBackfill & Compaction- trenchGI-29.00$ CYClear/Remove Brush, by hand (SY)GI-31.00$ SYBollards - fixedGI-4240.74$ EachBollards - removableGI-5452.34$ EachClearing/Grubbing/Tree RemovalGI-610,000.00$ Acre0.05500.000.353,500.00Excavation - bulkGI-72.00$ CYExcavation - TrenchGI-85.00$ CY60300.00Fencing, cedar, 6' highGI-920.00$ LFFencing, chain link, 4'GI-1038.31$ LFFencing, chain link, vinyl coated, 6' highGI-1120.00$ LFFencing, chain link, gate, vinyl coated, 20' GI-121,400.00$ EachFill & compact - common barrowGI-1325.00$ CYFill & compact - gravel baseGI-1427.00$ CYFill & compact - screened topsoilGI-1539.00$ CYGabion, 12" deep, stone filled mesh GI-1665.00$ SYGabion, 18" deep, stone filled mesh GI-1790.00$ SYGabion, 36" deep, stone filled meshGI-18150.00$ SYGrading, fine, by handGI-192.50$ SYGrading, fine, with graderGI-202.00$ SYMonuments, 3' LongGI-21250.00$ EachSensitive Areas SignGI-227.00$ EachSodding, 1" deep, sloped groundGI-238.00$ SYSurveying, line & gradeGI-24850.00$ DaySurveying, lot location/linesGI-251,800.00$ AcreTopsoil Type A (imported)GI-2628.50$ CYTraffic control crew ( 2 flaggers )GI-27120.00$ HR323,840.00Trail, 4" chipped woodGI-288.00$ SYTrail, 4" crushed cinderGI-299.00$ SYTrail, 4" top courseGI-3012.00$ SYConduit, 2"GI-315.00$ LFWall, retaining, concreteGI-3255.00$ SFWall, rockeryGI-3315.00$ SFSUBTOTAL THIS PAGE:4,640.003,500.00(B)(C)(D)(E)SITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR STREET AND SITE IMPROVEMENTSQuantity Remaining (Bond Reduction) (B)(C)Page 3 of 13Ref 8-H Bond Quantity WorksheetSECTION II.b TRANSPORTATIONUnit Prices Updated: 06/14/2016Version: 04/26/2017Printed 7/20/2021EXHIBIT 10
DocuSign Envelope ID: 161A4F20-D494-466C-B2E0-C93C3D6DC51E
CED Permit #:########ExistingFuture PublicPrivateRight-of-WayImprovementsImprovements(D) (E)DescriptionNo. Unit PriceUnitQuant.CostQuant.CostQuant.CostQuant.CostSITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR STREET AND SITE IMPROVEMENTSQuantity Remaining (Bond Reduction) (B)(C)ROAD IMPROVEMENT/PAVEMENT/SURFACINGAC Grinding, 4' wide machine < 1000syRI-130.00$ SYAC Grinding, 4' wide machine 1000-2000syRI-216.00$ SYAC Grinding, 4' wide machine > 2000syRI-310.00$ SY3003,000.00AC Removal/DisposalRI-435.00$ SY30010,500.00Barricade, Type III ( Permanent )RI-556.00$ LFGuard RailRI-630.00$ LFCurb & Gutter, rolledRI-717.00$ LFCurb & Gutter, verticalRI-812.50$ LF2963,700.00Curb and Gutter, demolition and disposalRI-918.00$ LF28504.00Curb, extruded asphaltRI-105.50$ LFCurb, extruded concreteRI-117.00$ LFSawcut, asphalt, 3" depthRI-121.85$ LF9471,751.95Sawcut, concrete, per 1" depthRI-133.00$ LFSealant, asphaltRI-142.00$ LFShoulder, gravel, 4" thickRI-1515.00$ SYSidewalk, 4" thickRI-1638.00$ SY1375,206.0017646.00Sidewalk, 4" thick, demolition and disposalRI-1732.00$ SYSidewalk, 5" thickRI-1841.00$ SYSidewalk, 5" thick, demolition and disposalRI-1940.00$ SYSign, Handicap RI-2085.00$ EachStriping, per stallRI-217.00$ EachStriping, thermoplastic, ( for crosswalk )RI-223.00$ SF1133.00Striping, 4" reflectorized lineRI-230.50$ LF5025.00Additional 2.5" Crushed SurfacingRI-243.60$ SYHMA 1/2" Overlay 1.5" RI-2514.00$ SY94713,258.00HMA 1/2" Overlay 2"RI-2618.00$ SYHMA Road, 2", 4" rock, First 2500 SYRI-2728.00$ SY15420.001674,676.00HMA Road, 2", 4" rock, Qty. over 2500SYRI-2821.00$ SYHMA Road, 4", 6" rock, First 2500 SYRI-2945.00$ SYHMA Road, 4", 6" rock, Qty. over 2500 SYRI-3037.00$ SYHMA Road, 4", 4.5" ATBRI-3138.00$ SYGravel Road, 4" rock, First 2500 SYRI-3215.00$ SYGravel Road, 4" rock, Qty. over 2500 SYRI-3310.00$ SYThickened EdgeRI-348.60$ LFSUBTOTAL THIS PAGE:38,397.955,322.00(B)(C)(D)(E)Page 4 of 13Ref 8-H Bond Quantity WorksheetSECTION II.b TRANSPORTATIONUnit Prices Updated: 06/14/2016Version: 04/26/2017Printed 7/20/2021EXHIBIT 10
DocuSign Envelope ID: 161A4F20-D494-466C-B2E0-C93C3D6DC51E
CED Permit #:########ExistingFuture PublicPrivateRight-of-WayImprovementsImprovements(D) (E)DescriptionNo. Unit PriceUnitQuant.CostQuant.CostQuant.CostQuant.CostSITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR STREET AND SITE IMPROVEMENTSQuantity Remaining (Bond Reduction) (B)(C)PARKING LOT SURFACINGNo.2" AC, 2" top course rock & 4" borrowPL-121.00$ SY2" AC, 1.5" top course & 2.5" base coursePL-228.00$ SY4" select borrowPL-35.00$ SY1.5" top course rock & 2.5" base coursePL-414.00$ SYSUBTOTAL PARKING LOT SURFACING:(B)(C)(D)(E)LANDSCAPING & VEGETATIONNo.Street TreesLA-1Median LandscapingLA-2Right-of-Way LandscapingLA-315.00$ SF4006,000.00Wetland LandscapingLA-4SUBTOTAL LANDSCAPING & VEGETATION:6,000.00(B)(C)(D)(E)TRAFFIC & LIGHTINGNo.SignsTR-1Street Light System ( # of Poles)TR-2Traffic SignalTR-3Traffic Signal ModificationTR-4SUBTOTAL TRAFFIC & LIGHTING:(B)(C)(D)(E)WRITE-IN-ITEMSAsphalt RampEACH500.00$ 21,000.00Perpendicular Curb RampEACH1,500.00$ 23,000.00Concrete Driveway EnteranceEACH3,000.00$ 13,000.00SUBTOTAL WRITE-IN ITEMS:7,000.00STREET AND SITE IMPROVEMENTS SUBTOTAL:56,037.958,822.00SALES TAX @ 10%5,603.80882.20STREET AND SITE IMPROVEMENTS TOTAL:61,641.759,704.20(B)(C)(D)(E)Page 5 of 13Ref 8-H Bond Quantity WorksheetSECTION II.b TRANSPORTATIONUnit Prices Updated: 06/14/2016Version: 04/26/2017Printed 7/20/2021EXHIBIT 10
DocuSign Envelope ID: 161A4F20-D494-466C-B2E0-C93C3D6DC51E
CED Permit #:########ExistingFuture PublicPrivateRight-of-WayImprovementsImprovements(D) (E)DescriptionNo. Unit PriceUnitQuant.CostQuant.CostQuant.CostQuant.CostDRAINAGE (CPE = Corrugated Polyethylene Pipe, N12 or Equivalent) For Culvert prices, Average of 4' cover was assumed. Assume perforated PVC is same price as solid pipe.) Access Road, R/DD-126.00$ SY* (CBs include frame and lid)BeehiveD-290.00$ EachThrough-curb Inlet FrameworkD-3400.00$ EachCB Type ID-41,500.00$ Each57,500.00CB Type ILD-51,750.00$ EachCB Type II, 48" diameterD-62,300.00$ Each for additional depth over 4' D-7480.00$ FTCB Type II, 54" diameterD-82,500.00$ Each for additional depth over 4'D-9495.00$ FTCB Type II, 60" diameterD-102,800.00$ Each for additional depth over 4'D-11600.00$ FTCB Type II, 72" diameterD-126,000.00$ Each for additional depth over 4'D-13850.00$ FTCB Type II, 96" diameterD-1414,000.00$ Each for additional depth over 4'D-15925.00$ FTTrash Rack, 12"D-16350.00$ EachTrash Rack, 15"D-17410.00$ EachTrash Rack, 18"D-18480.00$ EachTrash Rack, 21"D-19550.00$ EachCleanout, PVC, 4"D-20150.00$ Each4600.00Cleanout, PVC, 6"D-21170.00$ EachCleanout, PVC, 8"D-22200.00$ EachCulvert, PVC, 4" D-2310.00$ LFCulvert, PVC, 6" D-2413.00$ LFCulvert, PVC, 8" D-2515.00$ LF56840.00Culvert, PVC, 12" D-2623.00$ LFCulvert, PVC, 15" D-2735.00$ LFCulvert, PVC, 18" D-2841.00$ LFCulvert, PVC, 24"D-2956.00$ LFCulvert, PVC, 30" D-3078.00$ LFCulvert, PVC, 36" D-31130.00$ LFCulvert, CMP, 8"D-3219.00$ LFCulvert, CMP, 12"D-3329.00$ LFSUBTOTAL THIS PAGE:7,500.001,440.00(B)(C)(D)(E)SITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR DRAINAGE AND STORMWATER FACILITIESQuantity Remaining (Bond Reduction) (B)(C)Page 6 of 13Ref 8-H Bond Quantity WorksheetSECTION II.c DRAINAGEUnit Prices Updated: 06/14/2016Version: 04/26/2017Printed 7/20/2021EXHIBIT 10
DocuSign Envelope ID: 161A4F20-D494-466C-B2E0-C93C3D6DC51E
CED Permit #:########ExistingFuture PublicPrivateRight-of-WayImprovementsImprovements(D) (E)DescriptionNo. Unit PriceUnitQuant.CostQuant.CostQuant.CostQuant.CostSITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR DRAINAGE AND STORMWATER FACILITIESQuantity Remaining (Bond Reduction) (B)(C)DRAINAGE (Continued)Culvert, CMP, 15"D-3435.00$ LFCulvert, CMP, 18"D-3541.00$ LFCulvert, CMP, 24"D-3656.00$ LFCulvert, CMP, 30"D-3778.00$ LFCulvert, CMP, 36"D-38130.00$ LFCulvert, CMP, 48"D-39190.00$ LFCulvert, CMP, 60"D-40270.00$ LFCulvert, CMP, 72"D-41350.00$ LFCulvert, Concrete, 8"D-4242.00$ LFCulvert, Concrete, 12"D-4348.00$ LFCulvert, Concrete, 15"D-4478.00$ LFCulvert, Concrete, 18"D-4548.00$ LFCulvert, Concrete, 24"D-4678.00$ LFCulvert, Concrete, 30"D-47125.00$ LFCulvert, Concrete, 36"D-48150.00$ LFCulvert, Concrete, 42"D-49175.00$ LFCulvert, Concrete, 48"D-50205.00$ LFCulvert, CPE Triple Wall, 6" D-5114.00$ LFCulvert, CPE Triple Wall, 8" D-5216.00$ LFCulvert, CPE Triple Wall, 12" D-5324.00$ LFCulvert, CPE Triple Wall, 15" D-5435.00$ LFCulvert, CPE Triple Wall, 18" D-5541.00$ LFCulvert, CPE Triple Wall, 24" D-5656.00$ LFCulvert, CPE Triple Wall, 30" D-5778.00$ LFCulvert, CPE Triple Wall, 36" D-58130.00$ LFCulvert, LCPE, 6"D-5960.00$ LFCulvert, LCPE, 8"D-6072.00$ LFCulvert, LCPE, 12"D-6184.00$ LFCulvert, LCPE, 15"D-6296.00$ LFCulvert, LCPE, 18"D-63108.00$ LFCulvert, LCPE, 24"D-64120.00$ LFCulvert, LCPE, 30"D-65132.00$ LFCulvert, LCPE, 36"D-66144.00$ LFCulvert, LCPE, 48"D-67156.00$ LFCulvert, LCPE, 54"D-68168.00$ LFSUBTOTAL THIS PAGE:(B)(C)(D)(E)Page 7 of 13Ref 8-H Bond Quantity WorksheetSECTION II.c DRAINAGEUnit Prices Updated: 06/14/2016Version: 04/26/2017Printed 7/20/2021EXHIBIT 10
DocuSign Envelope ID: 161A4F20-D494-466C-B2E0-C93C3D6DC51E
CED Permit #:########ExistingFuture PublicPrivateRight-of-WayImprovementsImprovements(D) (E)DescriptionNo. Unit PriceUnitQuant.CostQuant.CostQuant.CostQuant.CostSITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR DRAINAGE AND STORMWATER FACILITIESQuantity Remaining (Bond Reduction) (B)(C)DRAINAGE (Continued)Culvert, LCPE, 60"D-69180.00$ LFCulvert, LCPE, 72"D-70192.00$ LFCulvert, HDPE, 6"D-7142.00$ LFCulvert, HDPE, 8"D-7242.00$ LFCulvert, HDPE, 12"D-7374.00$ LF33124,494.00Culvert, HDPE, 15"D-74106.00$ LFCulvert, HDPE, 18"D-75138.00$ LFCulvert, HDPE, 24"D-76221.00$ LFCulvert, HDPE, 30"D-77276.00$ LFCulvert, HDPE, 36"D-78331.00$ LFCulvert, HDPE, 48"D-79386.00$ LFCulvert, HDPE, 54"D-80441.00$ LFCulvert, HDPE, 60"D-81496.00$ LFCulvert, HDPE, 72"D-82551.00$ LFPipe, Polypropylene, 6"D-8384.00$ LFPipe, Polypropylene, 8"D-8489.00$ LFPipe, Polypropylene, 12"D-8595.00$ LFPipe, Polypropylene, 15"D-86100.00$ LFPipe, Polypropylene, 18"D-87106.00$ LFPipe, Polypropylene, 24"D-88111.00$ LFPipe, Polypropylene, 30"D-89119.00$ LFPipe, Polypropylene, 36"D-90154.00$ LFPipe, Polypropylene, 48"D-91226.00$ LFPipe, Polypropylene, 54"D-92332.00$ LFPipe, Polypropylene, 60"D-93439.00$ LFPipe, Polypropylene, 72"D-94545.00$ LFCulvert, DI, 6"D-9561.00$ LFCulvert, DI, 8"D-9684.00$ LFCulvert, DI, 12"D-97106.00$ LF434,558.00Culvert, DI, 15"D-98129.00$ LFCulvert, DI, 18"D-99152.00$ LFCulvert, DI, 24"D-100175.00$ LFCulvert, DI, 30"D-101198.00$ LFCulvert, DI, 36"D-102220.00$ LFCulvert, DI, 48"D-103243.00$ LFCulvert, DI, 54"D-104266.00$ LFCulvert, DI, 60"D-105289.00$ LFCulvert, DI, 72"D-106311.00$ LFSUBTOTAL THIS PAGE:29,052.00(B)(C)(D)(E)Page 8 of 13Ref 8-H Bond Quantity WorksheetSECTION II.c DRAINAGEUnit Prices Updated: 06/14/2016Version: 04/26/2017Printed 7/20/2021EXHIBIT 10
DocuSign Envelope ID: 161A4F20-D494-466C-B2E0-C93C3D6DC51E
CED Permit #:########ExistingFuture PublicPrivateRight-of-WayImprovementsImprovements(D) (E)DescriptionNo. Unit PriceUnitQuant.CostQuant.CostQuant.CostQuant.CostSITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR DRAINAGE AND STORMWATER FACILITIESQuantity Remaining (Bond Reduction) (B)(C)Specialty Drainage ItemsDitching SD-19.50$ CYFlow Dispersal Trench (1,436 base+)SD-328.00$ LF French Drain (3' depth)SD-426.00$ LFGeotextile, laid in trench, polypropyleneSD-53.00$ SYMid-tank Access Riser, 48" dia, 6' deepSD-62,000.00$ EachPond Overflow SpillwaySD-716.00$ SYRestrictor/Oil Separator, 12"SD-81,150.00$ EachRestrictor/Oil Separator, 15"SD-91,350.00$ EachRestrictor/Oil Separator, 18"SD-101,700.00$ EachRiprap, placedSD-1142.00$ CYTank End Reducer (36" diameter)SD-121,200.00$ EachInfiltration pond testingSD-13125.00$ HRPermeable PavementSD-14Permeable Concrete SidewalkSD-15Culvert, Box __ ft x __ ftSD-16SUBTOTAL SPECIALTY DRAINAGE ITEMS:(B)(C)(D)(E)STORMWATER FACILITIES (Include Flow Control and Water Quality Facility Summary Sheet and Sketch)Detention PondSF-1Each Detention TankSF-2Each Detention VaultSF-3Each Infiltration PondSF-4Each Infiltration TankSF-5Each Infiltration VaultSF-6Each Infiltration TrenchesSF-7Each Basic Biofiltration SwaleSF-8Each Wet Biofiltration SwaleSF-9Each WetpondSF-10Each WetvaultSF-11Each Sand FilterSF-12Each Sand Filter VaultSF-13Each Linear Sand FilterSF-14Each Proprietary FacilitySF-15Each Bioretention FacilitySF-16Each SUBTOTAL STORMWATER FACILITIES:(B)(C)(D)(E)Page 9 of 13Ref 8-H Bond Quantity WorksheetSECTION II.c DRAINAGEUnit Prices Updated: 06/14/2016Version: 04/26/2017Printed 7/20/2021EXHIBIT 10
DocuSign Envelope ID: 161A4F20-D494-466C-B2E0-C93C3D6DC51E
CED Permit #:########ExistingFuture PublicPrivateRight-of-WayImprovementsImprovements(D) (E)DescriptionNo. Unit PriceUnitQuant.CostQuant.CostQuant.CostQuant.CostSITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR DRAINAGE AND STORMWATER FACILITIESQuantity Remaining (Bond Reduction) (B)(C)WRITE-IN-ITEMS (INCLUDE ON-SITE BMPs)Drywell 9'dia. X 3' dp.WI-12,000.00$ 24,000.00Drywell 7'dia. X 3' dp.WI-21,800.00$ 11,800.00Connect to existing CBWI-31,500.00$ 11,500.008" Yard DrainWI-4200.00$ 3600.00WI-5WI-6WI-7WI-8WI-9WI-10WI-11WI-12WI-13WI-14WI-15SUBTOTAL WRITE-IN ITEMS:1,500.006,400.00DRAINAGE AND STORMWATER FACILITIES SUBTOTAL:38,052.007,840.00SALES TAX @ 10%3,805.20784.00DRAINAGE AND STORMWATER FACILITIES TOTAL:41,857.208,624.00(B) (C) (D) (E)Page 10 of 13Ref 8-H Bond Quantity WorksheetSECTION II.c DRAINAGEUnit Prices Updated: 06/14/2016Version: 04/26/2017Printed 7/20/2021EXHIBIT 10
DocuSign Envelope ID: 161A4F20-D494-466C-B2E0-C93C3D6DC51E
CED Permit #:########ExistingFuture PublicPrivateRight-of-WayImprovementsImprovements(D) (E)DescriptionNo. Unit PriceUnitQuant.CostQuant.CostQuant.CostQuant.CostConnection to Existing WatermainW-12,000.00$ Each24,000.00Ductile Iron Watermain, CL 52, 4 Inch DiameterW-250.00$ LFDuctile Iron Watermain, CL 52, 6 Inch DiameterW-356.00$ LFDuctile Iron Watermain, CL 52, 8 Inch DiameterW-460.00$ LFDuctile Iron Watermain, CL 52, 10 Inch DiameterW-570.00$ LFDuctile Iron Watermain, CL 52, 12 Inch DiameterW-680.00$ LFGate Valve, 4 inch DiameterW-7500.00$ EachGate Valve, 6 inch DiameterW-8700.00$ EachGate Valve, 8 Inch DiameterW-9800.00$ EachGate Valve, 10 Inch DiameterW-101,000.00$ EachGate Valve, 12 Inch DiameterW-111,200.00$ EachFire Hydrant AssemblyW-124,000.00$ EachPermanent Blow-Off AssemblyW-131,800.00$ EachAir-Vac Assembly, 2-Inch DiameterW-142,000.00$ EachAir-Vac Assembly, 1-Inch DiameterW-151,500.00$ EachCompound Meter Assembly 3-inch DiameterW-168,000.00$ EachCompound Meter Assembly 4-inch DiameterW-179,000.00$ EachCompound Meter Assembly 6-inch DiameterW-1810,000.00$ EachPressure Reducing Valve Station 8-inch to 10-inchW-1920,000.00$ EachWATER SUBTOTAL:4,000.00SALES TAX @ 10%400.00WATER TOTAL:4,400.00(B) (C) (D) (E)SITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR WATERQuantity Remaining (Bond Reduction) (B)(C)Page 11 of 13Ref 8-H Bond Quantity WorksheetSECTION II.d WATERUnit Prices Updated: 06/14/2016Version: 04/26/2017Printed 7/20/2021EXHIBIT 10
DocuSign Envelope ID: 161A4F20-D494-466C-B2E0-C93C3D6DC51E
CED Permit #:########ExistingFuture PublicPrivateRight-of-WayImprovementsImprovements(D) (E)DescriptionNo. Unit PriceUnitQuant.CostQuant.CostQuant.CostQuant.CostClean OutsSS-11,000.00$ Each22,000.00Grease Interceptor, 500 gallonSS-28,000.00$ EachGrease Interceptor, 1000 gallonSS-310,000.00$ EachGrease Interceptor, 1500 gallonSS-415,000.00$ EachSide Sewer Pipe, PVC. 4 Inch DiameterSS-580.00$ LFSide Sewer Pipe, PVC. 6 Inch DiameterSS-695.00$ LF807,600.001009,500.00Sewer Pipe, PVC, 8 inch DiameterSS-7105.00$ LF14315,015.00Sewer Pipe, PVC, 12 Inch DiameterSS-8120.00$ LFSewer Pipe, DI, 8 inch DiameterSS-9115.00$ LFSewer Pipe, DI, 12 Inch DiameterSS-10130.00$ LFManhole, 48 Inch DiameterSS-116,000.00$ Each16,000.00Manhole, 54 Inch DiameterSS-136,500.00$ EachManhole, 60 Inch DiameterSS-157,500.00$ EachManhole, 72 Inch DiameterSS-178,500.00$ EachManhole, 96 Inch DiameterSS-1914,000.00$ EachPipe, C-900, 12 Inch DiameterSS-21180.00$ LFOutside DropSS-241,500.00$ LSInside DropSS-251,000.00$ LSSewer Pipe, PVC, ____ Inch DiameterSS-26Lift Station (Entire System)SS-27LSSANITARY SEWER SUBTOTAL:28,615.0011,500.00SALES TAX @ 10%2,861.501,150.00SANITARY SEWER TOTAL:31,476.5012,650.00(B) (C) (D) (E)SITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR SANITARY SEWERQuantity Remaining (Bond Reduction) (B)(C)Page 12 of 13Ref 8-H Bond Quantity WorksheetSECTION II.e SANITARY SEWERUnit Prices Updated: 06/14/2016Version: 04/26/2017Printed 7/20/2021EXHIBIT 10
DocuSign Envelope ID: 161A4F20-D494-466C-B2E0-C93C3D6DC51E
Planning Division |1055 South Grady Way – 6th Floor | Renton, WA 98057 (425) 430-7200Date:Name:Project Name: PE Registration No:CED Plan # (LUA):Firm Name:CED Permit # (U):Firm Address:Site Address:Phone No.Parcel #(s):Email Address:Project Phase: Site Restoration/Erosion Sediment Control Subtotal (a)Existing Right-of-Way Improvements Subtotal (b)(b)97,518.25$ Future Public Improvements Subtotal(c)-$ Stormwater & Drainage Facilities (Public & Private) Subtotal(d)(d)50,481.20$ (e)(f)Site RestorationCivil Construction PermitMaintenance Bond29,599.89$ Bond Reduction2Construction Permit Bond Amount 3Minimum Bond Amount is $10,000.001 Estimate Only - May involve multiple and variable components, which will be established on an individual basis by Development Engineering.2 The City of Renton allows one request only for bond reduction prior to the maintenance period. Reduction of not more than 70% of the original bond amount, provided that the remaining 30% willcover all remaining items to be constructed. 3 Required Bond Amounts are subject to review and modification by Development Engineering.* Note: The word BOND as used in this document means any financial guarantee acceptable to the City of Renton.** Note: All prices include labor, equipment, materials, overhead and profit. 206.890.8291furrengineering@gmail.comAberdeen Ave. 2-Lot Shor Plat##-######2732 Aberdeen Ave.334390-1400FOR APPROVAL########4715 142nd Pl SW #B199,758.27$ P (a) x 100%SITE IMPROVEMENT BOND QUANTITY WORKSHEET BOND CALCULATIONS7/20/2021Dean A. Furr46937Furr Engineering ServicesR((b x 150%) + (d x 100%))S(e) x 150% + (f) x 100%Bond Reduction: Existing Right-of-Way Improvements (Quantity Remaining)2Bond Reduction: Stormwater & Drainage Facilities (Quantity Remaining)2T(P +R - S)Prepared by:Project InformationCONSTRUCTION BOND AMOUNT */**(prior to permit issuance)EST1((b) + (c) + (d)) x 20%-$ MAINTENANCE BOND */**(after final acceptance of construction)2,999.70$ 97,518.25$ 196,758.57$ 2,999.70$ -$ 50,481.20$ -$ Page 13 of 13Ref 8-H Bond Quantity WorksheetSECTION III. BOND WORKSHEETUnit Prices Updated: 06/14/2016Version: 04/26/2017Printed 7/20/2021EXHIBIT 10
DocuSign Envelope ID: 161A4F20-D494-466C-B2E0-C93C3D6DC51E
Page 13
OPERATIONS AND MAINTENANCE
EXHIBIT 10
x
MAINTENANCE INSTRUCTIONS FOR FULL INFILTRATION
Your property contains an on-site BMP (best management practice) called “full infiltration,” which
was installed to mitigate the stormwater quantity and quality impacts of some or all of the impervious
surfaces on your property.
Full infiltration is a method of soaking runoff from impervious area (such as paved areas and roofs)
into the ground. If properly installed and maintained per Appendix A of the City of Renton’s Surface
Water Design Manual, full infiltration can manage runoff so that a majority of precipitation events are
absorbed. Infiltration devices, such as gravel filled trenches, drywells, and ground surface depressions,
facilitate this process by putting runoff in direct contact with the soil and holding the runoff long
enough to soak most of it into the ground. To be successful, the soil condition around the infiltration
device must be reliably able to soak water into the ground for a reasonable number of years.
Infiltration Devices
The infiltration devices used on your property include the following as indicated on the site
plan (CHECK THE BOX(ES) THAT APPLY):
gravel filled trenches, drywells, ground surface depressions.
MAINTENANCE RESTRICTIONS
The size, placement, and composition of these devices as depicted by the site plan and design details
must be maintained and may not be changed without written approval from the City of Renton or
through a future development permit from the City of Renton.
INSPECTION FREQUENCY AND MAINTENANCE GUIDELINES
• Infiltration devices must be inspected annually and after major storm events to identify and
repair any physical defects.
• Maintenance and operation of the system should focus on ensuring the system’s viability by
preventing sediment-laden flows from entering the device. Excessive sedimentation will result
in a plugged or non-functioning facility.
• If the infiltration device has a catch basin, sediment accumulation must be removed on a yearly
basis or more frequently if necessary.
• Prolonged ponding around or atop a device may indicate a plugged facility. If the device
becomes plugged, it must be replaced.
• Keeping the areas that drain to infiltration devices well swept and clean will enhance the
longevity of these devices.
• For roofs, frequent cleaning of gutters will reduce sediment loads to these devices.
DocuSign Envelope ID: 161A4F20-D494-466C-B2E0-C93C3D6DC51E