20200372 Ver 1_Attachment 1_BooneFork_Proposed_LongPro_CrossSectns_20200311

Proposed Typical Cross Sections
and Longitudinal Profile for
Proposed Structures
(Including Regional Cures)
Boone Fork Stream Enhancement Project
Grandfather Ranger District, NFsNC
Submitted by: Brady Dodd, NFsNC Hydrologist
Attachment 1 –Proposed Cross-Section & Longitudinal Profile Changes
New Bankfull Elevation
TERRACE ELEVATION
New Channel Dimensions:
Bankfull Width = 25.5’
Bankfull Max. Depth = 2.0’
Bankfull Mean Depth = 1.5’
Regional Curve Estimates:
Drainage Area = 2.4 miles2
Bankfull riffle cross-section area = 36.7ft2
Bankfull discharge (cfs) = 187.8cfs
Bankfull mean depth @ riffle = 1.43ft
Bankfull width = 25.6ft
TERRACE ELEVATION
CROSS SECTIONS
New Bankfull Elevation
BANK MASHED
DOWN BY EXCAVATOR
TERRACE ELEVATION
New Pool Dimensions:
Bankfull Width: 26.0’
Bankfull Max. Depth: 6.6’
Bankfull Mean Depth: 4.0’
STRUCTURE LOCATION
New Bankfull Elevation BANK MASHED
DOWN BY EXCAVATOR
TERRACE ELEVATION
STRUCTURE LOCATION
New Bankfull Elevation BANK MASHED
DOWN BY EXCAVATOR
TERRACE ELEVATION
Bankfull Elevation
Pool Dimensions (From Reference Reach on Swannanoa Creek):
Pool length Lpool (includes run & glide): 24 -36’
Pool length ratio (Lpool/Wbkf): 0.96 –1.44’
Pool-to-pool spacing, p-p: 51 –84’
Pool-to-pool spacing ratio, (p-p/Wbkf): 2.04 –3.36’
Riffle Run
Glide Riffle
Pool
LONGITUDINAL PROFILE
Regression: NC + TN
y = 96.1x0.765
R² = 0.94
10
100
1000
0.1 1.0 10.0 100.0Estimated Bankfull Discharge (cfs)Watershed Drainage Area (mi2)
Blue Ridge Ecoregion 66: Estimated Bankfull Discharge
2.4
Blue Ridge Ecoregion 66: Bankfull Riffle Width
t
100.0
10.0
1.0
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Watershed Drainage Area (mil)

Regression: NC + TN
y = 1.10x0.301
R² = 0.93
0.1
1.0
10.0
0.1 1.0 10.0 100.0Bankfull Riffle Mean Depth (ft)Watershed Drainage Area (mi2)
Blue Ridge Ecoregion 66: Bankfull Riffle Mean Depth
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