CC - Stormwater Management Report TIM LAND GROUP, INC.
TM CREEK SUBDIVISION No. 2
MERIDIAN, IDAHO
STORM WATER MANAGEMENT—ENGINEERING DRAINAGE REPORT
ENGINEER g�1014AL Fyn,
The Land Group, Inc. �E
Eric Cronin, PE �.39:37
462 East Shore Drive
Eagle, Idaho 83616
Ph.: 208.939.4041 qrf OF 0
Fax: 208.939.4445 C CR
02/16/2017
Project No.: 116129
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K& MATERIALS 1 I September 2014
TES�fTING Fr Page # 1 of 1
_1 INSPECTION It141038g_drainageletter
❑ Environmental Services U Geotechnical Engineering J Construction Materials Testing :1 Special Inspections
Mr. Jay Walker
Brighton Corporation
12601 West Explorer Drive Suite 200
Boise, ID 83713
(208) 378-4000
Re: Drainage Recommendations Letter
Ten Mile Creek Development
SEC of Franklin & Ten Mile Roads
Meridian, ID
Dear Mr. Walker:
In compliance with your instructions, we have provided drainage recommendations for the proposed seepage
bed(s) for Ten Mile Crossing Drive. The recommendations in this letter are based on previous geotechnical
investigations performed onsite and observations and testing performed during till placement, that previously
occurred onsite.
Groundwater
In the vicinity of the project site, groundwater levels are controlled in large part by agricultural irrigation
activity and leakage from nearby canals. Maximum groundwater elevations likely occur during the later
portion of the irrigation season. During previous investigations performed in December 2010 and May 2014
within the proposed Ten Mile Creek Development, no evidence of groundwater was noted within borings and
test pits advanced to depths varying between 12.5 and 26.5 feet bgs. Based on evidence of this investigation
and background knowledge of the area, MTI estimates groundwater depths to remain greater than
approximately 20 feet bgs throughout the year. This depth can be confirmed through long-term groundwater
monitoring.
Soil Infiltration Rates
It is anticipated that poorly graded gravel with sand sediments will be encountered at depths varying between
12 and 15 feet below ground surface. These sediments typically exhibit infiltration values in excess of 12
inches per hour. Infiltration testing is generally not required within these sediments because of their free-
draining nature. It is recommended that infiltration facilities constructed on the site be extended into native
poorly graded gravel with sand sediments. Because of the high soil permeability, ASTM C33 filter sand, or
equivalent, should be incorporated into design of infiltration facilities. An infiltration rate of 8 inches per
j hour should be used in design. Actual infiltration rates should be confirmed at the time of construction.
i
MTI appreciates this opportunity to be of service to you and looks forward to working with you in the future.
If you have questions, please call (208) 376-4748.
Respectfully Submitted,
r Materials Testing & I
�p�( 0 E NSF
a
Elizabeth Brown, P E. 14898 Revieived by: David O. Cram, P.E.
Geotechnical Engin er p 61-11gq General Manager
OF,p00 Copyright o0 2014 Materials Testing&Inspection,Inc.
2791 Sou ay • Boise, ID 83709 • (208)376-4748 • Fax(208)322-6515
mti@mti-id.com • www.mti-id.com
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SITE DESCRIPTION:
General
TM Creek Subdivision No. 2 is the second phase of a multi-phase proposed commercial development. The
project is generally located in the NW % of the NW % of Section 14, T.3N., R.1W., Boise Meridian, City of
Meridian, Ada County, Idaho, on the south side of W. Franklin Road and on the east side of S.Ten Mile Road.
The Ten Mile Creek Drain bisect this phase of development and is comprised of 9 commercial lots and 2
common lot on approximately 9.63 acres.
Site Assessment of Soils, Bedrock&Seasonal High Ground Water
Soil evaluations and ground water monitoring were performed by Associated Earth Science, Inc., National
Resource Solution, LLC and Materials Testing & Inspection (MTI) between 2009 and 2014. Generally
speaking, subsurface native soils consist of silty loams, silty clay loams and gravely sands. Bedrock was not
encounter and ground water is anticipated more than 10-ft below ground surface. Refer to Appendix C for
the noted soil evaluations.
STORM WATER MANAGEMENT DESIGN DESCRIPTION
Drainage Calculation
i
i Permanent Systems
For permanent storm drain facilities, peak storage volume calculations were computed utilizing the
Bowstring Method for the 24-hr/100-yr design storm considering infiltration.See Appendix B for calculations.
Conveyance systems were designed for the 100-year design storm utilizing the rational method. Where
provided, flow through sand & grease traps were designed not to exceed 0.5-ft/sec for the 100-year
conveyance design storm.
An infiltration rate of 6-8 in/hr should be expected in the underlying free draining gravely sandy loams,
however, an infiltration rate of 3-in/hr was utilized to allow for a factor of safety of two.
Temporary Systems
For temporary storm drain facilities, peak storage volume calculations were computed utilizing the rational
method and NRCS Synthetic Unit Triangular Hydrograph for the 100-yr/1-hr design storm. See Appendix B
for calculations.
An infiltration rate of 1-2 in/hr should be expected in the near grade loam soils and 6-8 in/hr should be
expected in the underlying free draining gravely sandy loams. Given the temporary nature and at grade
nature of the temporary facilities, an infiltration rate of 6-in/hr was utilized in the design where drainage
windows were excavated into underlying free draining soils and 1-in/hr where drainage windows were not
installed.
On-site Storm Water Drainage Facilities
Refer to the Drainage Area Map within Appendix A for the contributing areas for each drainage zone. The
drainage area associated with the permanent facilities is considered that area within the access easements.
[; The drainage area associated with the temporary facilities is considered the contributing area associated with
the roadway design finish grade and existing grade of the contributing lots. In time, all temporary facilities
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462 E. Shore Drive,Suite 100- Eagle, Idaho 83616 - P 208.939.4041 - F 208.939.4445 ,www.thelandgroupinc.com
will be replaced with permanent systems as individual lots are further developed and required to retain their
storm water on their own respective lot in conjunction with the contributing roadway water associated with
the access easement.
Permanent Systems
Storm water from Zone 1 will be conveyed to inlet catch basins and sand and grease traps via overland flow
then routed to underground seepage beds where it will be temporarily stored and treated prior to percolating
into underlying free draining soils.
Temporary Systems
Storm water from Zones 2-8 will be conveyed to curb drains which will daylight into dry ponds via overland
flow. Storm water will be temporarily stored and treated prior to percolating into native soils. The temporary
dry ponds have in excess of 6" of free-board between the curb and gutter flowline elevation and design storm
water surface elevation.
Off-site Storm Water Drainage Facilities
No off-site drainage improvements are proposed with this phase of development.
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462 E.Shore Drive, Suite 100• Eagle, Idaho 83616• P 208.939.4041 • F 208.939.4445 •www.thelandgroupinc.com
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APPENDix A
DRAINAGE AREA MAP
Site Planning' Landscape Architecture Civil Engineering Golf Course Irrigation & Engineering Graphic Design Surveying
462E. Shore Drive, Suite lO0- Eagle, Idaho D36l6' PZ0&939.4041 ' F208.939.4446 -www.the|andKvoupinczom
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APPENDIX B
DRAINAGE CALCULATIONS
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Site Planning Landscape Architecture Civil Engineering Golf Course Irrigation & Engineering Graphic Design Surveying
462 E. Shore Drive, Suite 100- Eagle, Idaho 83616• P 208.939,4041 • F 208,939.4445 •www.thelandgroupinc.coni
Drainage Area Characteristics : Zone 1
Total Area = 17 , 209 s . f. (0 . 40 ac )
Pervious = 2 , 392 s .f. 0 . 20 Landscape
Impervious = 14, 817 s . f. 0 . 95 Asphalt, concrete
Weighted ' C ' = 0 . 85
Storage Volume Required : Bowstring Method
REQUIRED STORAGE & INFILTRATION VOLUME ( 24 hour - 100 Year Design Storm ) :
Time Time Time Intensity Q dev . V dev . V inf. VS
( hr) ( min . ) ( sec . ) ( in ./ hr) ( cfs ) ( cf) ( cf) ( cf)
0 . 17 10 600 3 . 10 1 . 04 621 30 592
0 . 25 15 900 2 . 62 0 . 88 788 45 743
0 . 50 30 11800 1 . 82 0 . 61 11095 89 11005
1 60 31600 1 . 10 0 . 37 11323 179 11144
2 120 71200 0 . 66 0 . 22 1 11588 358 11230
3 180 10, 800 0 . 48 0 . 16 11732 536 11196
6 360 21 , 600 0 . 28 0 . 09 21021 11073 948
12 720 43 , 200 0 . 15 0 . 05 21165 21145 20
24 11440 86,400 0 . 03 0 . 01 866 4, 290 3 , 424
VS max = 1, 230 c . f.
System Size : Seepage Bed
L = 55 ft length
W = 13 ft width
D = 5 . 00 ft depth
k = 3 . 0 in/hr percolation rate per geotech report w/ factor of safty of 2 . 0
APerc = 715 s . f. infiltration area ( L x W )
Qperc = 179 c . f./hr infiltration flow rate ( APefC x k)
VV = 1, 251 c . f . void volume ( 35 % voids )
51 c .f. TOTAL facility capacity VT>_ VS max ? •'
Trec = 6. 9 hrs facility recovery time Trec< 24 hrs "
S/ G Trap Check
Vault Size = Oldcastle ' New ' 1000 Gallon
# of units = 1
Throat Area = 7 . 08 s . f.
iThroat Velocity = 0 . 15 fps Throat Velocity< 0 . 5 fps
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I' llV LAIND GROUP" INCO
Drainage Area Characteristics : Zone 2
Total Area = 54, 186 s .f. ( 1 . 24 ac)
Pervious = 50, 304 s . f. 0 . 20 Landscape
Impervious = 3, 882 s . f. 0 . 95 Asphalt, concrete
Weighted ' C' = 0 . 25
Design Storm Volume
I = 2 . 0 in/hr 100-yr, 1- hr storm
Qioo = 0 . 63 cfs rational method
Vigg = 1,138 0. 1 NRCS Synthetic Triangular Hydrograph; time to peak : 22 . 5 -min
System Size : Swale
WB= 15 . 0 ft bottom width
LB= 17 . 0 ft top width
S = 2 : 1 side slope
AT = 675 s . f. top area
AB = 255 s . f. bottom area
D = 2 . 50 ft depth ( excludes 6 " of freeboard )
Ws = 6 . 00 ft sand infiltration window width
LS = 17 . 00 ft sand infiltration window length
k = 6 . 0 in/hr percolation rate per geotech report
Aperc = 102 s . f. infiltration area (AB)
Qperc = 51 c.f./hr infiltration flow rate (AB x k )
capacity less 6 " freeboad VTR Vioo? Yes
Trec = 22 . 3 hrs facility recovery time Trec< 24 hrs Yes
44:-
Site Planning Landscape Architecture • Clwil Engineering • Golf Course Irrigation &. Engineering Graphic Design Surveying
462 E . Shore Drive, Suite 100 • Eagle, Idaho 83616 • P 208 . 939 .4041 • F 208 . 939.4445 • www.thelandgroupinc . com
`I' III; LAND GROVP INC ,
Drainage Area Characteristics : Zone 3
Total Area = 14, 276 safe ( 0 . 33 ac)
Pervious = 8, 350 safe 0 . 20 Landscape
Impervious = 51926 safe 0 . 95 Asphalt, concrete
Weighted 'C ' = 0 . 51
Design Storm Volume
I = 2 . 0 in/hr 100-yr, 1- hr storm
Qioo = 0 . 34 cfs rational method
Vioo = 604 0. NRCS Synthetic Triangular Hydrograph ; time to peak : 22 . 5 - min
System Size : Swale
WB= 10 . 0 ft bottom width
LB= 10 . 0 ft top width
S = 2 : 1 side slope
AT = 400 safe top area
AB = 100 safe bottom area
D = 2 . 50 ft depth ( excludes 6 " of freeboard )
Ws = 6 . 00 ft sand infiltration window width
Ls = 10 . 00 ft sand infiltration window length
k = 6 . 0 in/hr percolation rate per geotech report
Aperc = 60 safe infiltration area (AB)
Qperc = 30 c.f./hr infiltration flow rate (AB x k)
c.T* capacity less 6 " freeboad VT>_ Vloo? Yes
Trec = 20 . 1 hrs facility recovery time Trec< 24 hrs Yes
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VIA LAND GROMP INC .
Drainage Area Characteristics : Zone 4
Total Area = 3, 269 s .f. ( 0 . 08 ac)
Pervious = 1, 286 s . f. 0 . 20 Landscape
Impervious = 11983 On 0 . 95 Asphalt, concrete
Weighted ' C' = 0 . 65
Design Storm Volume
I = 2 . 0 in/hr 100-yr, 1- hr storm
Qioo = 0 . 10 cfs rational method
ViBB = 177 0. NRCS Synthetic Triangular Hydrograph ; time to peak : 22 . 5 - min
System Size : Swale
WB= 10 . 0 ft bottom width
LB= 10 . 0 ft top width
S = 2 : 1 side slope
AT = 400 s . f. top area
AB = 100 s . f. bottom area
D = 2 . 50 ft depth ( excludes 6 " of freeboard )
k = 1 . 0 in/hr percolation rate per geotech report
Aperc = 100 s . fe infiltration area ( AB )
Qperc = 8 c .f./hr infiltration flow rate (AB x k)
capacity less 6 " freeboad VTi Vioo? Yes
Trec = 21 . 3 hrs facility recovery time Trec< 24 hrs Yes
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i,
7I1116 LAND GROV11P INC .
Drainage Area Characteristics : Zone 5
Total Area = 5, 997 s .f. ( 0 . 14 ac )
Pervious = 2, 264 s . f. 0 . 20 Landscape
Impervious = 3 , 733 s . f. 0 . 95 Asphalt, concrete
Weighted ' C' = 0 . 67
Design Storm Volume
I = 2 . 0 in/ hr 100-yr, 1- hr storm
Qioo = 0 . 18 cfs rational method
Vioo = 331 c.f. NRCS Synthetic Triangular Hydrograph ; time to peak : 22 . 5 -min
System Size : Swale
WB= 10 . 0 ft bottom width
LB= 10 . 0 ft top width
S = 2 : 1 side slope
AT = 400 s . f. top area
AB = 100 s . f. bottom area
D = 2 . 50 ft depth ( excludes 6 " of freeboard )
Ws = 3 . 0 ft sand infiltration window width
Ls = 10 . 0 ft sand infiltration window length
k = 6 . 0 in/hr percolation rate per geotech report
Aperc = 30 s . f. infiltration area (AB )
Qperc = 15 c.f./hr infiltration flow rate (AB x k)
capacity less 6 " freeboad VTi Vioo? Yes
Tfec = 22 . 1 hrs facility recovery time Trec< 24 hrs Yes
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7114: LAND GROUP» JNtC .
Drainage Area Characteristics : Zone 6
Total Area = 79, 894 s . f. ( 1 . 83 ac )
Pervious = 71, 277 s . f. 0 . 20 Landscape
Impervious = 81617 safe 0 . 95 Asphalt, concrete
Weighted ' C ' = 0 . 28
Design Storm Volume
I = 2 . 0 in/hr 100-yr, 1- hr storm
Qioo = 1 . 03 cfs rational method
V 1857 c.f. NRCS Synthetic Triangular H dro ra h ; time to peak : 22 . 5 - min
ioa = � Y g Y g p
System Size : Swale
WB= 20 . 0 ft bottom width
LB= 24 . 0 ft top width
S = 2 : 1 side slope
AT = 11020 s . fe top area
AB = 480 s . f. bottom area
D = 2 . 50 ft depth ( excludes 6 " of freeboard )
Ws = 8 . 00 ft sand infiltration window width
Ls = 20 . 00 ft sand infiltration window length
k = 6 . 0 in/hr percolation rate per geotech report
Aperc = 160 s .f. infiltration area (AB)
Qperc = 80 c.f./hr infiltration flow rate (AB x k)
capacity less 6 " freeboad VTR V100? Yes
Trec = 23 . 2 hrs facility recovery time Tre<< 24 hrs Yes
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Till,: r.A ;vD GROXJw. INC *
Drainage Area Characteristics : Zone 7
Total Area = 8, 941 s . f. (0 . 21 ac)
Pervious = 4, 426 s .f. 0 . 20 Landscape
Impervious = 4, 515 s . f. 0 . 95 Asphalt, concrete
Weighted ' C ' = 0 . 58
Design Storm Volume
I = 2 . 0 in/hr 100-yr, 1- hr storm
Qioo = 0 . 24 cfs rational method
V100 = 428 c.f. NRCS Synthetic Triangular Hydrograph; time to peak : 22 . 5 - min
System Size : Swale
WB= 10 . 0 ft bottom width
LB= 10 . 0 ft top width
S = 2 : 1 side slope
AT = 400 s . f. top area
AB = 100 s .f. bottom area
D = 2 . 50 ft depth ( excludes 6 " of freeboard )
Ws = 4 . 00 ft sand infiltration window width
Ls = 10 . 00 ft sand infiltration window length
k = 6 . 0 in/ hr percolation rate per geotech report
Aperc = 40 s . f. infiltration area (AB)
Qpem = 20 c .f./hr infiltration flow rate (AB x k)
capacity less 6 " freeboad VT? Vloo? Yes
Trec = 21 .4 hrs facility recovery time Trec< 24 hrs Yes
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11111: LAND (MORIP INC4
Drainage Area Characteristics : Zone 8
Total Area = 32 , 056 s . f. (0 . 74 ac)
Pervious = 27, 542 s . f. 0 . 20 Landscape
Impervious = 4, 514 s .f. 0 . 95 Asphalt, concrete
Weighted ' C ' = 0 . 31
Design Storm Volume
1 = 2 . 0 in/hr 100-yr, 1 - hr storm
Qioo = 0 .45 cfs rational method
j Vioo = 811 c.f. NRCS Synthetic Triangular Hydrograph; time to peak : 22 . 5-min
System Size : Swale
WB= 15 . 0 ft bottom width
LB= 10 . 0 ft top width
S = 2 : 1 side slope
AT = 500 s . f. top area
AB = 150 s . f. bottom area
D = 2 . 50 ft depth ( excludes 6 " of freeboard )
WS = 5 : 00 ft sand infiltration window width
LS = 15 . 00 ft sand infiltration window length
k = 6 . 0 in/hr percolation rate per geotech report
Aperc = 75 s .f. infiltration area (AB)
Qperc = 38 c.f./hr infiltration flow rate (AB x k)
capacity less 6 freeboad VT>_ vivo? Yes
Trec = 21 . 6 hrs facility recovery time Trec< 24 hrs Yes
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APPENDIX C
SO|L8 EVALUATION & GROUND WATER MONITORING
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ASSOCIATED EARTH
SCIE NCE, S, luc Septic Drain Field Test Hole Description & Evaluation
Date of Evaluation: 4/29/09 Evaluated by: Glen H. Logan, Certified Professional Soil Scientist
Requested by: Jay Walker, Brighton Corporation
Address: 12601 W. Explorer Drive, Suite 200 I'lione: 208-378-4000
City: BOISE State: IDA110 Zip: 83713
Lot Size: No. of Bedrooms: Parcel Y:
Legal Description: T3N, RJW, Section 14 NW 1/4 NW 1/4
General Description, 40 Acres adjoining on the SE of Mile Road/Franklin Road
intersection.
Depth Moist Est.
(inches) Color TeElure Clay% Roots L Mottles Permeability Comments
Hole Nitinber& Location: 1-09 CPS-001
0-13 1 OYR Fine Gravelly 2 0-22 Niany very fine None .5-1 Friable
4/6 Silt Loam
13-27 1 OYR Silty clay 34-36 Few very fine None .06-,2 Firm
3/3 Loam.
27-40 1 0YR/6-
Loam 22-24 Few very fine None 2-.6 Fri A I e
4-50 Vaiicptcd Medim Loamy Sand <3 Few very fine None 4-9 Loose
-n
50-62 vadepted Loamy <3 None None 4-8 Loose
Medium Sand
Gravelly 7.5YR
62-169 Coarse Sand <2 None 5/6 12-15 Loose
40%Distinct
Gcnera-I Notes: Slope: 0-I'Vo No free water to 16811
Depth Moist
Texture Clay% Roots Mottles 11,1-till,1
(inches) Color 1ity Continents
Hole Ntimber& Location- 2-09 G1ll5-002
10YR Many very fine
0-13 Silt Loam 20-22 None .5-1 Friable
3/3 and fine
I OYR Common very
13-29 Silt Loam22-24 None S-1 Friable
2/2 fine and fine
OYR
28-52 J3/3 Silt Loam 24-26 Few very fine None .5-1 Friable
Very
1 OYR Gravelly 3-5 None IOYR
52-67 6-8 Loose
3/4 Loamy 3/6, 5%, faint
Coarse Sand
Extremely
IOYR Gravelly 10YR 5/6
67-174 5-10 None 6-8 Loose
3/6 Coarse Sandy 5 fa i n t
Loam
General Notes. Slope. 0-1% Free water at 113"
R-Value Sample
STORAI I M N FIELD S1 1<T
Date Of Evaluation- 4/29109 Project: Ten-Mile Properties ( 0 Acres)
Depth Moist "texture Clay% [tools Mottles Permeability Comments
(inches) Color (in/IYr
Hole Number& Location: 3-09 GPS-003
i OYR Many very fine..._ ._--
0-12 3/4 Silt Loam 25-27 _ and fineNone 5-1 Friable
10YR __-Cousrnots very
12-18 4/4 Loam 22 24 fine None .5-1 Friable
_ _.
IOYR Few very fine
1>3 40 3/4 Silt Loam 22-? and fine None 5-1 Friable
1 OYR Silty Clay
4t)-�� 3/6 Loam 30`37 None None .?-.h Slightly Finnw
fi0-75
10YR Gravelly Silty 3._,-31 t ,Nona: None .06 ...,
. Very Finn
4/f CILoam—
Extremely
75�142 vwiQLwfcd Gravelly 0 None None 15-20 Loose
Coarse Sand
General Notes: Slope. 1-2%, - Free water at 141$'
Depth Moist tsst
(inches) Color Texture Clay Q,,� Roof Mottles 1 Permeability CaI13BIIBR$9
(in/hr
Hole Number& Location: 4-09 GPS-005
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IOYR Silty Clay Many very fine x
0-9 2 2_7-30 None .6 Slightly Firm
3/3 Loam and fine
22 10YR silty Clay Common very`
3/4 Loam 32-34 fine None 06-.2 Firnl
10YR Fine Sandy
22.36 6/4 Loam 10-l ff Few very fine None 3-5 Very Friable
___._... lOYlt Extremely
36-59 Gravelly Fine 14-16 None None 4-6 Compacted
6/11 Sandy Loam
Extremely
58-174 varic"Icd Gravelly Nine 0 None None 12-I5 Looso
Sand
General Notes: Slope: 0-1% - Free water at 169"
STORM DRAIN FIELD SHEET
site Of Evaluation: 4/29/09 Project: Ten-Mile Properties (40 Acres)
Depth Moist Est.
(inches) Color Teytulle Clay% Roots Mottles Permeability Comments
ittihr
Hole Number& Location: 5-99 GIPS-004
0-10 1 OYR Silty Clay 3/4 Loam 30-32 Many very fine None .5-1 Friable
10-20 10YR Silty Clay 32-34 Common very None 06-.2 Very Firm
3/0 Loam.___ fine and fine
20A I I OYR Silt Loam 20-22 Few very fine None .5-1 Very Friable
6/4 and title
Extrumely
Gravelly Extremely
41-50 Moderately — None None <.02 Hard
Cemented
Hard )an
Extremely
50-168 valiept"I Gravelly <3 None None 12-15 Loose
Loamy
Medium Sand
N W jeneral Notes, Slope: 0-1% o Free Ater to 168"
Depth Moist
(inches) Color Texture Clay% Roots Mottles Permeability Comments
Hole Number& Location. 6-09 GIIS-006
0-)2 1 OY3/4IZ Silt Loam 22-24 Few very fino None 5-1 Friable
12-29 10YR Silly Clay 3/6 Loam 27-30 Few very fine None .2-,6 Slightly Firm,
29-65 10YR Sandy Loam 16-18 None None 1-2 Slightly Dcrise
5/6
65-78 10YR Coarse Sandy 10-12 None None 4-6 Very friable
4/6 Loam
78-88 ywic"' ed Loamy <3 Nonc Nunc 12-15 Loose
Coarse Sand
0/4 YR
88-144 1 Silt Loam 22-24 None None .5-1 Friable
4
Extremely
144-168 v ,eteir Gravelly
<3 None None 12-15 Loose
Loamy
Coarse Sand
General Notes: Slope. 34% No free water to 168"
STORM DRAIN FIELD SHEET
Date Of Evaluation: 4/30/09 Project: Ten-Mile Properties (40 Acres)
Depth Moist Texture Clay% Roots Mottles Permeability Comments
(inches) Color
Hole Number& Location: 7-09 GPS-007
lOYR 27 Many very line
O-(0 Silt Loam 2.s-�. None 1-2 Slightly Finn
3/4 and fine
I0-45 __ Indurated - None None hnpenneable Fractured
1lard an Indurated Pan
IOYR Tine Sandy Sonic hardpan
d5-60 6/4 Loam -10 gone None 6�� fragments
60-75 10YR Very Fine 10-12 None None 3-4 Very Friable
4/6 Sandy Loam
Extremely
75-17$ vancrumt Loamy
Gravelly 2 None None 1v.7
-15 Loose
Medium Sand
General Notes: Slope; 046/0 e Free Water at 177"
R-Value Sample
Depth Moist Est.
(inches) Color Texture Clay% boots Mottles Pcrineaahility Comments
in r
Hole Number& Loeaation: 8-09 CmPSJ008
IOYR Common very
0-15 3/3 Laarn 22�2d fine and ]bvr Alone ,S-1 5%Gravel
j Coarse
IOYR Silty Clay
15-25 3/3 Loam 27-30 Few very fine None .2 .6 Slightly Firm
25-55 IOYR Silty Clay 3q-32 None None .2-.6 lAirnt
4/4 Loam
I OYR Gravelly 10YR 5/6,
55-63 Loan) 22-2d Notre font,5°.Q 5-1 Friable
Extremely
Gravelly 10YR 5/6
63-99 Vadegaled
Loam Coarse <2 Alone faint, 54'0 12-15 Loose
Sand
General Notes: Slope: 0-1% A Free water at 76"
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R-Value Sample
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STORM DRAIN FIELD SHEET
Date Of Evaluation: 4/30/09 Project- Ten-Mile Properties (40 Acres)
1st,
(inches) C
Depth Color Moist Texture Clay% Roots Mottles Permeability conrrnents
Hole Number& Location., 9-09 Gills-009
10Yi3. Loamy Leine <3 Many very tine 10%Gravel,
0-11 3/3 Sand and fine None l0-!2 Loose
Extremely
11-22 10Yit Gravelly <;5 Common very None 8µ10 Loose
3/4 Loamy Fine fine and tine
Sand
10YR Very Common very
22-44 3/3 Gravelly Fine 7-9 fine None 6-8 Very Friable
Sandy Loam
Extremely
44-170 va.-:g"wd Gravelly and 0 None None 15-20 Loose
Cobbly
Coarse Sand
General Notm Slope: 0-1% Free Wales da( 120"
R-V aloe Sample
Depth I oist
(inches) Colas Texture Clpy �u hoots Mottlesiermesability Comments inlhr)
j 1-iole Number& Location- 10 09 GPS-010
t1-1 1 10YR Gravelly 18-20 Many very fine None .5-1 Friable
3/3 Loam
_ -- _- _.__.
11-26 10YR Silt Loam} 20-22 Common very None .5-1 Very Friable
3/3 tine
__ ._. _ ...............
26 41 10YR Silt Loam 20-22 Few very tine None .5-1 Very Friable
3/4
Extremely
41-112 VWiegated Gravelly 0 None None 15-20 Loose
Caa se Sand
General Notes: Slope: 0-1% _ its free water to 17211
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NATURAL -RESOURCE &LUTIONS
LLC
Consultinci, Sail Evaluations & Data Collection MARK L', 1011NSON
Phone 208.809.9099
Fnx 208.887.1212
March 13, 2011 rrARLEi,R.Nor
Phone 208-850,492E
Fax 208.6294820
Jay Walker
Brighton Corporation
12601 W. Explorer Drive
Boise, ID 03713
Et Soil investigation on Ten mile properties
On March 11.11, 1 observed and described soil profiles in five test pits on property
located in the west half of Section 14, Township 3 North, Mange 1 West just east
of South `renmile Load. Maps are attached showing the GPS location of each new
test pit along with existing monitor locations on each parcel. Detailed soil profile
descriptions are provided which includes estimated permeability rates for each
horizon. PVC pipes were placed in each test pit prior to backfilling to allow for
groundwater monitoring.
TEN MILE 40 ACRES SITE
Four test holes were excavated to depths from 12 to 15 feet below ground level
in this parcel. Excavations at 23-11, 24-11 and 25-11 all had hardpans present in
the profiles. Because of reduced permeability in these layers, they will need to be
removed and replaced with suitable filter material where storm drainage
systems are to be placed.
T17e upper part of all profiles has been disturbed to some extent. At 26-11 the
entire soil profile has been removed down to the underlying sand, gravel and
cobbles and replaced with coarse fill. At other locations about 12 to 24 inches of
topsoil had been removed. All profiles but 23-11 were underlain by "pit rain"
material. At that location loam textures were present to a depth greater than 1.2
feet below ground level.
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j No free water or evidence of wetness was observed in any of these four test pits.
Groundwater monitoring will verify if groundwater is present on this parcel.
5741) N. APP EBROon WAY HOLSLf,1A1110 83713
I
Tennifle soils-page 2
TENMILE 80 ACRES SITE
A single test pit (20-11) was placed in the southwest corner of this parcel to
replace a nearby monitor well that was destroyed in the construction of the
freeway interchange. This location has a native soil profile with a discontinuous
weak to moderate hardpan present in the 33 to 64 inch layer. The profile was
underlain by medium sand at a depth of 80 inches extending to more than 102
inches below ground level. The sandy material was saturated and free water was
standing in the pit at 85 inches. Groundwater levels will likely rise well above
this 85 inch level later in the irrigation season. The excavation was not advanced
past a depth of 102 inches.
All soil profiles observed will accept a properly designed stormwater disposal
system. We will begin monitoring groundwater levels at both sites oil about
April Ist and collect biweekly readings throughout the irrigation season. If You
have questions or need anything additional, please call race at 850-4926.
HARLEY R. NOE
Professional Soil Scientist
cc w/ attachments via e-mail: Gene Smith, Engineering Northwest, Boise
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torm Drain Test Hole Description
Solutions, LLC Evaluation
Date Of Evaluation: 3/1 1/201 1 Evaluated by: Harley R. Noe, Professional Soil Scientist
Requested By: Brighton Corporation (Jay Walker)
Address: 12601 W. Bxplorer Drive, Suite 200 Phone: 378--4000
City: Boise State: ID Zip: 83713
Legal Desc: NW 1/4 of NW 1/4 Section 14, T.3 N., R. 1 W., Boise Meridian, Ada County, ID
General Desc: At southeast corner of Franklin Road and South Tenmile Road
DepthEst.
(inches) Color Texture Clay% Roots Mottles permeability Comments
(inlhrj
Hole Number& Location: 3e l I
mixed silt loam and common fine&very
0 to 42 loam 15 to 25 fine none 1 to 2 placed material from surrounding area
this was likely the original Bt horizon
42 to 59 10YR 4/3 silty clay 45+ few very fine&fine none <0.02 beneath 12 to 24 inches of topsoil
59 to 73 10YR 5/4 silt loam 23 to 25 few very fine&fine none 0.5 to 1 friable moist
73 to 96 10YR 5/3 loam 16 to 17 none none 1 to 2 very friable moist
series of moderate
96 to 122 10YR 7/4 &weak hardpans none none 0 5 to 1 discontinuous plates,highly fractured
very weakly cemented;sorne hard
122 to 156+ 10YR 5/3 loam 12 to 14 none none 1 to 2 nodules
General Notes: Slope <2 percent. No free water or wetness present anywhere in the profile. No sand
or gravel encountered within 1.5 feet of ground surface. About 12 to 24 inches of topsoil had been removed from top of
profile and replaced with mixed soil fill,
Hole Number& Location: 4- I 1
approaches silty clay loam;mixed A&
i 0 to 14 10YR 313 silt loam 24 to 26 few very fine&fine none 0.5 to 1 B horizons
14 to 33 10YR 4/3 loam 15 to 17 few very fine&fine none 1 to 2 friable
bottom 12 inches is strongly cemented
33 to 76 7.5YR 6/4 series of hardpans none none 0.06 to 0.2 and dense
E very gravelly loamy
76 to 111 variegated sand <5 none none 8 to 15 5%cobbles
I
I extremely gravelly
111 to 160+ variegated sand <3 none none readable 15 to 20 15%cobbles
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General Notes: Slope <2 percent.. Some mixing disturbance in upper 14 inches. Probably 12 inches has
been removed from surface. No free water or wetness evidence present in profile.
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Natural Resource
Storm Drain Test Hole Description &
Solutions, LLC Evaluation
Continuation Sheet
Date Of Evaluation: 3/11/201 1 Project: Tennnile 40 acres
Depth Color Texture Clay % Boots Mottles Est,perm. Comments
(inches) (in/fir)
Hole Number & Location: - 1 1
0 to 10 10YR 3/3 silt foam 23 to 25 few very fine&fine none 0.5 to 1 very friable moist
10 to 28 10YR 4/6 loam 14 to 16 few very fine&fine none 1 to 2 very friable moist
lower 12 inches is strongly cemented
28 to 78 7 5YR 6/4 series of hardpans Wane none <0.02 and very dense
very gravelly loamy
78 to 96 variegated sand 3 to 5 none none 12 to 15 5 percent cobblers
extremely gravelly
96 to 160+ variegated sand <3 none none 15 to 20+ 10 to 15 percent cobbles
General Motes: Slope < 2 percent, About 12 inches of surface has likely been removed. No free welter
or evidence of wetness in profile to a depth of 12 feet below ground level.
Hole Number& location: 26- 11
contains loam soil, sands, gravel and
0 to 60 variegated mixed fill 5 to to few fine&very fine none 4 to 10 cobbles
very gravelly loamy some thin lenses have additional fines
60 to 180+ variegated sand&sand <5 none nano 15 to 20" and approach loam textures
General (dotes: Slope <2 percent. The entire soil profile has been removed down to the underlying sand
and gravel layers. Upper 60 inches is now placed,mixed fill. No free water or evidence of wetness observed in test pit
to a depth of 15 feet below ground level.
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NATURAL RESOURCE &LUTIONS
LLC
consultincl, Soil Evaluations & Data Collection � MARK E-101INSON
Phone 208.809 9099
October 21., 2011 Fax 208 887 1212
HARM']?. NOE
Phone 208.850 4926
Fax 208 939-8G02
Jay Walker
Brighton Corporation
12601 W. Explorer Drive
Suite 200
Boise, ID 83713
m Final 2011 groundwater nionitoring report - 'Fentnile 4.0 Acres
Data collection has been completed on eight test holes for 2011 at the Tenmile 4-0
Acre site, A table showing field measurements at each point is provided along
with a map showing test hole locations. Values are Lased on depth Below current
ground level.
The highest measured levels occurred mostly in August and early September.
These peaks were later than those on the 80 acre property to the south. Also,
groundwater levels were generally deeper in this parcel, This may be attributed
to lack of irrigation oil this parcel and a greater depth to the underlying
lacustrine sediments that perch the groundwater.
1n my opinion, all the data is reliable except those readings at 27-11 and 28-1.1.
Those pipes were placed by NIT1 using perforated pipe. In addition they left
depressional areas around the pipe. These conditions allowed irrigation water
frog: the corn clop to enter the standing pipe impacting the readings. The
readings at 27-11 made some sense, but those from 28-11 mean nothing. You
can use readings at the other six points to engineer storm drain facilities on this
parcel.
If you need anything additional on this parcel, please contact me at 850-4,926.
HARLEY R. NOE
Professional Soil Scientist
5710 A� APPLEBROOK WAY BOISL,IDAHO 83713
Ten mile 40 acres 2011 Monitoring
All readings are depth below ground level in inches
Hole Bottorn 219/11 at dig 414 4/15 4128 5/12 5127 6/14 6/24 7/8 7/22 8/5 8/19 913 9117 1011 10//15
Number Depth 3/11/11
1-09 164 dry - dry dry dry 161 160 137 135 127 123 114 113 108 109 128 145
7.09 169 dry - dry dry 167 143 130 119 117 84 89 91 83 88 101 117 131
23-11 152 - 156 dry dry to dry to dry to dry to dry to dry to dry to dry to dry to dry to dry to dry to dry to dry to dry to
132 132 132 132 132 132 132 132 132 132 132 132 132 132 132
24-11 162 - 160 dry dry to dry to dry to dry to 158 150 150 134 133 132 132 135 137 146 154
162 162 162 162
25-11 144 - 160 dry dry to dry to dry to dry to dry to dry to dry to dry to dry to dry to dry to dry to dry to dry to city to
116 116 116 116 116 116 116 116 116 116 116 116 116 116 116
26-11 176 - 180 dry dry dry dry dry dry dry dry 169 161 156 153 149 147 152 158
27-11 153 - - dry dry dry 152 145 135 128 118 74 44 65 60 62 77 81
28-11 144 m 106 110 101 47 29 29 24 0 4 13 0 16 '12 34 42
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April 15- Irrigation water in ditch along south boundary. No water being applied on properly.
April 28- No crops planted&no irrigation anywhere on property. Added 15"{ripe piece on #24-11 to maintain visibility.
Original pipe now at 12"above ground level, not 33.
May 12- No irrigation of planted corn in fields at 27 & 28. Water in ditch along south boudary.
May 27- Pulled top pipe off at 24-11 to measure water depth. Pull to measure in future if rising 33 inch minus value.
June 14 - Corn on two east pipes not yet irrigated
June 24 - Corn at 27& 28 not yet irrigated,
July 8 - Standing irrigation water at 28-11. Perforated pipe caused ground level reading. fury around pipe at 27-11 with field
being irrigated.
July 22- standing water at 28-11. Used 33 minus value on#24 to maintain consistency in readings. Make sure all are
consistent
August 5- standing water at 27 & 28 within past 3 to 4 days
August 19- standing water at 27 &28 within last 3 days
Sept. 3 -no water standing a@#27 & 28 but has been there in last few days. Same problem, perforated pipe yields poor
I results. These measurements really have no value. Too dependent on nearby standing water entering perforations.
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October 19 - Values shown for 24-11 are from CURRENT ground level where fill has been added since test hole was placed
on March 11.
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Tenmilo 40 2012 Monitoring
All readings are depth below ground level in inches
3127 4124 5/85121 6/4 6118 7
Hole Bottom12 7/16 7130 8/13 8P28 9111 9P24 1018
Number depth
1-09 164 164 164 164 164 147 127 125 116 128 134 130 134 141 153
7-09 '1691 169 169 158 135 114 105 68 75 74 79 77 92 103 120
23-11 162 152 152 152 152 152 152 149 148 -147 162 154 154 154 154
2 -11 10 141 141 141 141 141 129 103 98 97 103 96 109 117 126
2 -11 144 144 144 '144 144 144 144 144 137 133 133 130 138 144 144
1 -11 '176 176 176 176 176 176 176 169 161 158 155 153 157 168 163
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j 27-1 1 71 71 71 71 71 71 0 71 71 71 71 71 71 71 71
28-11 144 113 102 48 0 19 8 151
5 15 17 17 17 19 27 41
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TEST I-tOL 27-11 DRY ALL. SEAS 3N O DEPTH H OF 71 INGHES
518 - No irrigation yet at#27 & 28.
5121 - irrigating grain @ 28-11 w/ standing water in pipe. No irrigation yet at 27-11,
614- grain @#28 not irrigated since last visit.
6118- #28 nearby water standing. No irr on grain since last visit. #27 being irrigated, standing water.
712- Grain @ 28 not irrigated for a week. Water on grain @ #27 5 to 7 days ago.
716- Water around#28 pipe in past 3 days. Grain ra #27 irrigated in last week.
7130- No tail water @#28 for 3 to 7 days & no irrigation on grain for a rnonth.
8113- Dry around#28, but still shows shallow water. Grain cut at 27 & 28,
1018- water out of lateral in past week.
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NATURAL -RESOURCE SOLUTpONS
LLC
Consultinci, Sail Evaluations & Data Collection AL•1RIi E.JOHN.5ON
Phone- 208 869.9099
October 27, 2013 Fax 208887 1212
11ARLE)'R, NOE
Phone 208,9504926
Fax 208 939-8602
Jay Walker
Brighton Corporation
12601 W. Explorer Drive
Suite 200
Boise, ID 83713
RED Tenmile Green 2013 final monitor report
Groundwater monitoring has been completed for the irrigation season on the property
located Tenmile Road and Franklin Road. The data sheet is attached showing all
collected readings. A neap is included showing the monitor pipe locations.
Data collection was discontinued at 28-11 on July 23rd. This pipe was placed by MTI in
a low position where irrigation waste water ponded. In addition they installed
perforated pipe which allowed ponded water to enter the pipe. Therefore, the readings
did not represent true groundwater levels and readings were discontinued.
Test hole 23-11 remained dry to 152 inches and 28-11 to 76 inches throughout the
season. The pipe at 28-11 is perforated and soil has sifted in and partially filled the
tube resulting in the shallow, but dry, 76 inch bottom depth. Peak free water was
measured at 131 inches at 24-11 and 133 inches at 25-11.
When compared to 2011 and 2012 data, the site is demonstrating slightly deeper leak
groundwater levels. The drop from previous years is likely due to lack of irrigation and
cropping on part of the site for the past three years and the decrease in irrigated
cropland in the surrounding area. It appears across the property a peals level of 11 feet
helow ground level is suitable for planning purposes.
If you have questions, please contact me by phone at 850-2946 or by e-mail.
HARLEY R. NOE
Professional Soil Scientist.
cc w/ attachments via e-mail: Mr. Gene Smith, The Land Group, Eagle, ID
5740 N. APPLEBROOK WAY BOISl:,IDAHO ��_ 83713
Tenmile Creek 2013 Monitoring
All readings are depth below ground level in inches
Hole Bottom 5/1 5/14 5/30 6112 6125 7/9 7/23 8/5 8/20 9/3 9/18 1012 10/17
Number depth
23-11 15I 152 152 152 152 152 152 152 152 152 152 152 152 152
24-11 1�/t 164 156 156 144 141 140 131 135 142 140 '150 164 164
25-11 141 141 141 141 141 135 133 141 141 141 141 141 141 141
27-11 G 76 76 76 76 76 76 76 76 76 76 76 76 76
2 -11 144 23 9 0 0 0 5 na na na na na na na
511 - reading at 28-11 should be true since no irrigation has yet taken place
5114- irr in north field impacting this pipe,
5130- water standing around 1128 pipe. New minus value at 1127.
6112- water staring around pipe 1#28. This is not a good representation of that area IF irrigation is removed,
6125- Water ponded around 1128, Corn there irrigated 3-5 days ago.
719-water around pipe @ 1128,
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