477 E Grant St-Revised-20161115Allen Schbemaker
_,
From:
dan@civsolutions.com
Sent:
Thursday, June 22, 2017 12:42 PM
To:
Allen Schoemaker
Cc:
Monte Wulf
Subject:
Monte Wulf Site
Attachments:
Plan Sheet.pdf; Revised Report.pdf
Al,
I've revised the report and plan sheet based on the widened driveway. Since the driveway basically eliminates
any storage on the north side, it all has to go to the south part of the property. This plan includes a small ditch
on the east side of the building to carry storm water drainage to the south side of the property. The berm has
been lengthened to the north and to the west to contain the runoff. There is a slight depression at the northwest
corner to catch any drainage from the west side of the building.
If you have any questions, don't hesitate to contact me.
Daniel E. Norman, P.E.
Civil Solutions, LLC
16439 Briar St.
Omaha, NE 68136
(402)895-5633
Civil
Lopst4
Solutions,
Monte Wulf Drainage Study
695 E. Grant Street
Blair, NE
PROJECT UNDERSTANDING
16439 Briar Street
Omaha, NE 68136-4154
402-895-5633
Monte Wulf is planning to build a 50' x 40' building. The lot size is approximately 120 feet long
by 65' wide. Mr. Wulf widened his driveway from the original proposed width of 23 feet to 40
feet. The additional concrete width affects the amount of storm runoff from the site.
The City of Blair, NE requires that storm water runoff from the 100 year storm event on a
developed condition must not exceed the historic condition.
The drainage analysis for the existing site conditions was completed using the Win TR -55 Small
Watershed Hydrology program developed by the Natural Resources Conservation Service
(MRCS). Output data includes storm water runoff for the 10 -yr and 100 -yr storm events.
EXISTING SITE CONDITIONS
From the Natural Resources Conservation Service, it was determined that the soils in this area
are classified as Luton Silty Clay. The Hydrologic Soil Group for this soil is C/D. Drainage on
the site is split between the north and the south. Approximately half of the site drains to the
north, and the other half drains to the south. There is very little room to store any drainage on
the north side of the property with the revised driveway layout; therefore, all storage must be
designed on the south half of the property. Storm runoff from the entire site will be used to
design the required storage.
Total area = 0.21 acres = 0.0003 sq. miles
Area = 0.21 acres Brush Area = 0.17 acres
Woods/Grassed Area = 0.04 acres
Q 100 = 0.92 cfs
www.civsolutions.com
PROPOSED SITE CONDITIONS
Total area = 0.21 acres = 0.0003 sq. miles
Area = 0.21 acres Grass Area = 0.12 acres
Paved Parking/Roof = 0.09 acres
Q100 =1.50 cfs
The new driveway is sloped to the east. Storm water runoff will exit the driveway into a one foot
wide ditch where it will flow along the east side of the building into the storage area on the south
side of the building. The storage area will be created by lengthening the berm to the west and to
the north. The capacity of the south storage is 255 cubic feet. The required storage for the
entire site is 157 cubic feet. A small depression on the west side of the driveway will store any
runoff from the west side of the building.
ATTACHMENTS
No. 1 — Site Layout and Grading Plan Sheet
No. 2 — Historic Drainage Pattern
No. 3 — Soil Description of the Site
No. 4 - Drainage Analysis for Existing Site Conditions (7 pages)
No. 5 - Drainage Analysis for Proposed Site Conditions (7 pages)
No. 6 — Direct Runoff (Q) from the Existing 100 Yr. Storm
No. 7 — Direct Runoff (Q) from the Proposed 100 Yr. Storm
No. S — Detention Basin (Storage Volume Calculations)
www.civsolutions.com
Map Unit Description: Luton silty clay, rarely flooded ---Washington County, Nebraska
Washington County, Nebraska
7791—Luton silty clay, rarely flooded
Map Unit Setting
National map unit symbol: f8lj
Elevation: 1,000 to 1,500 feet
Mean annual precipitation: 28 to 30 inches
Mean annual air temperature: 50 to 54 degrees F
Frost -free period: 150 to 170 days
Farmland classification: Not prime farmland
ATTACHMENT NO. 3
SOIL DESCRIPTION OF SITE
PAGE I OF 2
Map Unit Composition
Luton, rarely flooded, and similar soils: 75 percent
Minor components: 25 percent
Estimates are based on observations, descriptions, and transects of the
mapunit.
Description of Luton, Rarely Flooded
Setting
Landform: Backswamps on flood plains
Down-slope shape: Concave, linear
Across -slope shape: Concave, linear
Parent material: Clayey alluvium
Typical profile
A - 0 to 12 inches: silty clay
Bkg - 12 to 24 inches: silty clay
Bkssyg - 24 to 33 inches: silty clay
Bssyg - 33 to 43 inches: silty clay
Bkyg - 43 to 50 inches: silty clay
B'kg - 50 to 60 inches: silty clay
Properties and qualities
Slope: 0 to 2 percent
Depth to restrictive feature: More than 80 inches
Natural drainage class: Poorly drained
Runoff class: High
Capacity of the most limiting layer to transmit water (Ksat):
Moderately low to moderately high (0.06 to 0.20 in/hr)
Depth to water table: About 0 to 18 inches
Frequency of flooding: Rare
Frequency of ponding: None
Calcium carbonate, maximum in profile: 15 percent
Gypsum, maximum in profile: 5 percent
Available waterstorage in profile: Moderate (about 6.6 inches)
Interpretive groups
Land capability classification (irrigated): 3w
Land capability classification (nonirrigated): 3w
Hydrologic Soil Group: CID
USDA Natural Resources Web Soil Survey 11/15/2016
r Conservation Service National Cooperative Soil Survey Page 1 of 2
Map Unit Description: Luton silty clay, rarely flooded ---Washington County, Nebraska
ATTACHMENT NO. 3
SOIL DESCRIPTION OF SITE
PAGE 2 OF 2
Ecological site: Clayey Overflow - Veg. zone 4 (R107XY069NE)
Hydric soil rating: Yes
Minor Components
Tieville, rarely flooded
Percent of map unit: 15 percent
Landform: Backswamps on flood plains
Down-slope shape: Concave, linear
Across -slope shape: Concave, linear
Ecological site: Clayey Overflow - Veg. zone 4 (R107XY069NE)
Hydric soil rating: Yes
Forney, rarely flooded
Percent of map unit: 10 percent
Landform: Backswamps, flood plains
Down-slope shape: Concave, linear
Across -slope shape: Concave, linear
Ecological site: Clayey Overflow - Veg. zone 4 (R107XY069NE)
Hydric soil rating: Yes
Data Source Information
Soil Survey Area: Washington County, Nebraska
Survey Area Data: Version 14, Sep 8, 2015
USDA Natural Resources Web Soil Survey 11/15/2016
r Conservation Service National Cooperative Soil Survey Page 2 of 2
r --
ATTACHMENT NO. 2
HISTORIC DRAINAGE PA'
GRANTSTREET
CD
fit Al = 0.12 ac.
o, ;
o � o
A2 = 0.07 ac.
--------------------------- o
x x
x x
1005 ------------- - -
IN
J
ATTACHMENT NO. 4
DRAINAGE ANALYSIS FOR
EXISTING SITE (PAGE 1 OF 7)
WinTR-55 Current Data Description
--- Identification Data ---
User: Dan Norman Date: 6/21/2017
Project: Monte Wulf Building Units: English
SubTitle: Existing Site Drainage Areal Units: Acres
State: Nebraska
County: Washington
Filename: F:\Civil Solutions\Monte Wulf Site - Blair, NE\Existing Site Drainage.w55
--- Sub -Area Data ---
Name Description Reach Area(ac) RCN Tc
---------------- -------------------
A1 Outlet 0.21 66 0.1
Total area: .21 (ac)
--- Storm Data --
Rainfall Depth by Rainfall Return Period
2 -Yr 5 -Yr 10 -Yr 25 -Yr 50 -Yr 100 -Yr 1 -Yr
(in) (in) (in) (in) (in) (in) (in)
-------------------------------------------------------------------------------
3.0 3.87 4.6 5.25 5.95 6.55 2.42
Storm Data Source: Washington County, NE (NRCS)
Rainfall Distribution Type: Type II
Dimensionless Unit Hydrograph: <standard>
WinTR-55, Version 1.00.10 Page 1 6/21/2017 10:37:01 AM
ATTACHMENT NO.4
DRAINAGE ANALYSIS FOR
EXISTING SITE (PAGE 2 OF 7)
Dan Norman Monte Wulf Building
Existing Site Drainage
Washington County, Nebraska
Storm Data
Rainfall Depth by Rainfall Return Period
2 -Yr 5 -Yr 10 -Yr 25 -Yr 50 -Yr 100 -Yr 1 -Yr
(in) (in) (in) (in) (in) (in) (in)
-------------------------------------------------------------------------------
3.0 3.87 4.6 5.25 5.95 6.55 2.42
Storm Data Source:
Rainfall Distribution Type:
Dimensionless Unit Hydrograph:
Washington County, NE (NRCS)
Type II
<standard>
WinTR-55, Version 1.00.10 Page 1 6/21/2017 10:37:01 AM
ATTACHMENT NO. 4
DRAINAGE ANALYSIS FOR
EXISTING SITE (PAGE 3 OF 7)
Dan Norman Monte Wulf Building
Existing Site Drainage
Washington County, Nebraska
Watershed Peak Table
Sub -Area Peak Flow by Rainfall Return Period
or Reach 10 -Yr 100 -Yr
Identifier (cfs) (cfs)
-------------------------------------------------------
SUBAREAS
Al 0.46 0.92
REACHES
OUTLET 0.46 0.92
WinTR-55, Version 1.00.10 Page 1 6/21/2017 10:37:01 AM
ATTACHMENT NO. 4
DRAINAGE ANALYSIS FOR
EXISTING SITE (PAGE 4 OF 7)
Dan Norman Monte Wulf Building
Existing Site Drainage
Washington County, Nebraska
Hydrograph Peak/Peak Time Table
Sub -Area Peak Flow and Peak Time (hr) by Rainfall Return Period
or Reach 10 -Yr 100 -Yr
Identifier (cfs) (cfs)
(hr) (hr)
----------------------------------------------------------------------
SUBAREAS
Al 0.46 0.92
11.94 11.94
REACHES
OUTLET 0.46
0.92
WinTR-55, Version 1.00.10 Page 1 6/21/2017 10:37:01 AM
Dan Norman Monte Wulf Building
Existing Site Drainage
Washington County, Nebraska
Sub -Area Summary Table
Sub -Area Drainage Time of Curve Receiving
Identifier Area Concentration Number Reach
(ac) (hr)
------------------------------------------------------
Al .21 0.100 66 Outlet
Total Area: .21 (ac)
ATTACHMENT NO. 4
DRAINAGE ANALYSIS FOR
EXISTING SITE (PAGE 5 OF 7)
Sub -Area
Description
WinTR-55, Version 1.00.10 Page 1 6/21/2017 10:37:01 AM
Dan Norman Monte Wulf Building
Existing Site Drainage
Washington County, Nebraska
Sub -Area Time of Concentration Details
Sub -Area
Flow
Mannings's
Identifier/
Length
Slope
n
(ft)
(ft/ft)
-----------------------------------------
Al
SHEET
15
0.3540
0.240
SHALLOW
78
0.0250
0.050
ATTACHMENT NO. 4
DRAINAGE ANALYSIS FOR
EXISTING SITE (PAGE 6 OF 7)
End Wetted Travel
Area Perimeter Velocity Time
(sq ft) (ft) (ft/sec) (hr)
-------------------------------------
0.017
0.008
Time of Concentration 0.1
WinTR-55, Version 1.00.10 Page 1 6/21/2017 10:37:01 AM
Dan Norman Monte Wulf Building
Existing Site Drainage
Washington County, Nebraska
Sub -Area Land Use and Curve Number Details
Sub -Area
Identifier Land Use
----------------------------------------------------
Al Brush - brush, weed, grass mix (good)
Woods - grass combination (good)
Total Area / Weighted Curve Number
ATTACHMENT NO. 4
DRAINAGE ANALYSIS FOR
EXISTING SITE (PAGE 7 OF 7)
Hydrologic
Sub -Area
Curve
Soil
Area
Number
Group
(ac)
----------------------------
C
.172
65
C
.038
72
.21
66
WinTR-55, Version 1.00.10 Page 1 6/21/2017 10:37:01 AM
ATTACHMENT NO. 5
DRAINAGE ANALYSIS FOR
PROPOSED SITE (PAGE I OF 7)
WinTR-55 Current Data Description
--- Identification Data ---
User: Dan Norman Date: 6/21/2017
Project: Monte Wulf Building Units: English
SubTitle: Proposed Site Drainage Areal Units: Acres
State: Nebraska
County: Washington
Filename: F:\Civil Solutions\Monte Wulf Site - Blair, NE\Proposed Site Drainage.w55
--- Sub -Area Data ---
Name Description Reach Area(ac) RCN Tc
--------------------------------
Al Outlet 0.21 84 0.1
Total area: .21 (ac)
--- Storm Data --
Rainfall Depth by Rainfall Return Period
2 -Yr 5 -Yr 10 -Yr 25 -Yr 50 -Yr 100 -Yr 1 -Yr
(in) (in) (in) (in) (in) (in) (in)
----------------------------------- ----
3.0 3.87 4.6 5.25 5.95 6.55 2.42
Storm Data Source: Washington County, NE (NRCS)
Rainfall Distribution Type: Type II
Dimensionless Unit Hydrograph: <standard>
WinTR-55, Version 1.00.10 Page 1 6/21/2017 10:38:25 AM
ATTACHMENT NO. 5
DRAINAGE ANALYSIS FOR
PROPOSED SITE (PAGE 2 OF 7)
Dan Norman Monte Wulf Building
Proposed Site Drainage
Washington County, Nebraska
Storm Data
Rainfall Depth by Rainfall Return Period
2 -Yr 5 -Yr 10 -Yr 25 -Yr 50 -Yr 100 -Yr 1 -Yr
(in) (in) (in) (in) (in) (in) (in)
-------------------------------------------------------------------------------
3.0 3.87 4.6 5.25 5.95 6.55 2.42
Storm Data Source: Washington County, NE (NRCS)
Rainfall Distribution Type: Type II
Dimensionless Unit Hydrograph: <standard>
WinTR-55, Version 1.00.10 Page 1 6/21/2017 10:38:25 AM
ATTACHMENT NO. 5
DRAINAGE ANALYSIS FOR
PROPOSED SITE (PAGE 3 OF 7)
Dan Norman Monte Wulf Building
Proposed Site Drainage
Washington County, Nebraska
Watershed Peak Table
Sub -Area Peak Flow by Rainfall Return Period
or Reach 10 -Yr 100 -Yr
Identifier (cfs) (cfs)
-------------------------------------------------------
SUBAREAS
Al 0.94 1.50
REACHES
OUTLET 0.94 1.50
WinTR-55, Version 1.00.10 Page 1 6/21/2017 10:38:25 AM
ATTACHMENT NO. 5
DRAINAGE ANALYSIS FOR
PROPOSED SITE (PAGE 4 OF 7)
Dan Norman Monte Wulf Building
Proposed Site Drainage
Washington County, Nebraska
Hydrograph Peak/Peak Time Table
Sub -Area Peak Flow and Peak Time (hr) by Rainfall Return Period
or Reach 10 -Yr 100 -Yr
Identifier (cfs) (cfs)
(hr) (hr)
----------------------------------------------------------------------
SUBAREAS
Al 0.94 1.50
11.93 11.93
REACHES
OUTLET 0.94
1.50
WinTR-55, Version 1.00.10 Page 1 6/21/2017 10:38:25 AM
ATTACHMENT NO. 5
DRAINAGE ANALYSIS FOR
PROPOSED SITE (PAGE 6 OF 7)
Dan Norman Monte Wulf Building
Proposed Site Drainage
Washington County, Nebraska
Sub -Area Time of Concentration Details
Sub -Area
Flow
Mannings's
End
Wetted
Travel
Identifier/
Length
Slope
n
Area
Perimeter
Velocity
Time
(ft)
(ft/ft)
(sq ft)
(ft)
(ft/sec)
(hr)
--------------------------------------------------------------------------------
Al
SHEET
47
0.0198
0.011
0.011
CHANNEL
112
0.0100
0.030
0.72
2.79
2.074
0.015
Time of Concentration 0.1
WinTR-55, Version 1.00.10 Page 1 6/21/2017 10:38:25 AM
ATTACHMENT NO. 5
DRAINAGE ANALYSIS FOR
PROPOSED SITE (PAGE 7 OF 7)
Dan Norman
Monte Wulf Building
Proposed Site Drainage
Washington County, Nebraska
Sub -Area Land Use and Curve Number
Details
Sub -Area
Hydrologic
Sub -Area
Curve
Identifier
Land Use
Soil
Area
Number
Group
(ac)
--------------------------------
Al Open
ace; grass cover > 75° (good)
space; a
C
.12
74
Paved
parking lots, roofs, driveways
C
.09
98
Total
Area / Weighted Curve Number
.21
84
WinTR-55, Version 1.00.10 Page 1 6/21/2017 10:38:25 AM
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