20010102 Ver 1_Mitigation Evaluation_20091006 (2)

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Ecosystem
PROGRAM
Project Closeout Summary-Caviness Site (2009)
Proiect ID & St atus
Project Name/Number: Caviness (Tibbs Run & West Branch)
EEP ID : 73
Coun : Randolph
Project Tye: Stream Restoration & Enhancement
(DOT Transfer)
Current Status: 5 Years of Monitoring complete
Project Setting & Cla ssifications Proiect Timeline
Basin: Deep River of Cape Fear Milestone Date
Physiographic Region: Piedmont
Drainage: Tibbs Run (3.3 SM) Permitted May 2003
West Branch (1.1 SM)
Watershed: Rural Pasture, Imp cover <1% Construction ]an 2004
Ecoregion: Carolina Slate Belt Site Planted J Feb 2004
USGS Hydro Unit: 03030003
NCDWQ Subbasin; 03-06-09 Monitoring Year-1 Fall 2004
Thermal Regime: Warm Monitoring Year-2 Fall 2005
Monitoring Year-3 Fall 2006
Monitoring Year-4 Fall 2007
Monitoring Year-5 Fall 2008
Table 1. Project Restoration Components and Mitigation Assets
Drainage/Hydrology Component Stationing Asset Ratio

Tibbs Run
1
10+00 to 32+55) 1 Map #
1 Approach
P1/P2 Level
R Multip
1.00 Feet
2211 SMU
2211 Acres Buffer
West Branch (50+00 to 58+10) 1 2 P1/PII R 1.00 778 778

Buffer Eligible Buffer 3-12 R 1.00
Page I of 7 Caviness Site (Tibbs Run) (73) Closeout Summary
Caviness Site (EEP # 73) -Asset Map
N
0 100 200 400 600 800 W E
Feet
S

Project Background and Summary
The mitigation project includes approximately 3000 linear feet comprised of Tibbs run, the projects
mainstem, and its tributary, West Branch. Priority Level I and II restoration approaches were used
to convert degraded and incised E and over widened C channel segments to stable E/C channel
types. Construction involved establishing a new planform and profile and better connecting the
bankfull discharge to a floodplain feature. Cross vanes were installed for grade control and bank
stability. The adjacent streambanks were re-sloped to reduce erosion. It also included the installa-
tion of native vegetation to establish or enhance the riparian buffer, and fence out livestock.
Goals and Objectives
1. Protection of riparian zone vegetation and restored channels by excluding livestock.
2. Enhancement of overall stream stability by establishing the correct width to depth ratio, reducing
entrenchment, sloping banks, and installing plantings
3. Stabilize the channel bed and provide habitat diversity through the use and proper placement of
stream structures;
4. Planting of native trees, shrubs, and ground cover in the riparian zone that will help to stabilize
the stream banks, establish shade, and provide wildlife cover and food.
Success Criteria
The project permits from early 2003 indicated morphological measurement was not required, rather
visual assessment/survey, photos, evidence of at least 2 bankfull events, ancivegetative survival
would constitute project success monitoring.
Morphological Stability. The project channels should demonstrate general morphological stability
such that no adverse trends in channel aggradation, degradation or widening are evident. This was
to be demonstrated through photos and visual survey. This criterion was met.
Vegetative Success. Vegetation plots should indicate no less than 320 stems in year 3 and no less
than 260 stems in year 5. This criterion was met.
Hydrologic Data. The channels should indicate overbank events, 2 at minimum. This criterion was
met.
Page 3 of 7 Caviness Site (Tibbs Run) (73) Closeout Summary
Pre-Construction Site Conditions

i

M
Page 4 of 7 Caviness Site (Tibbs Run) (73) Closeout Summary
Post-Construction Site Conditions- 2008 Photos

Y9

?f?aa

Photo Point 6 - facing upstream. Sta. 12+80
Page 5 of 7 Caviness Site (Tibbs Run) (73) Closeout Summary
Overall the site exhibited stability. Local areas of erosion totaling 4-5% of the projects bank footage oc-
curred primarily early in the projects history and demonstrated little advancement over time. Some
structures have lost some of their intended functions, but most are fully functioning. These instances of
instability occurred primarily in the upper half of the project mainstem, where the maintenance of ma-
ture stands in the near bank regions has been providing stability. In order to accommodate these ma-
ture stems some banks in this area are higher and steeper as a result, but there is evidence that the
floodplain is still accessed with reasonable frequency in these areas.
In general the site has exhibited overall morphological stability. No systemic trends of degradation or
aggradation were evident. The site did however require multiple treatments for beaver. In 2006 beaver
created a dam in the upper section of the mainstem on Tibbs run and were removed in early 2007. Little
flow was exhibited in the channel for much of 2007 in association with the historic drought and some
point between May and early Fall of 2008 beaver re-colonized and built 6 dams on site. These beaver
and the associated dams were removed in late fall 2008, with follow up early in 2009.
Vegetative Performance
The site generally exhibits a vigorous buffer that provides a closed canopy in many locations. Mature
stems were left and incorporated wherever possible, particularly where the existing stands were most
prominent on the upper part of the projects mainstem. The average number of planted stems from the
sites 3 vegetation plots is 587 stems per acre.
Table N'I: Stem counts for each species arranged by plot.
Caviness Farm (Tibbs Run Stream Restoration Sitet? -o}ect \o. 73

Species
Plors M t:50 ft) Year I
Totals Year 2
Totals Tear3
Totals Year J
Totals Year S
Totals
sdeatiSc Name CommonName IM \Y? TP3 (12M) (2005) (2006) (2007) (20M
Shtubs
Iva Sh:ub; :xe:e :anted
Trees
Framue umh-=1ca Gieennh 27
39
3
31 21
'icarttu occ Srcamote V 39 i9 48 t3 38
rerru; alba ilbte cak :
4 5 31 ?S _9 2-1
Southemrtdaal ' 19 4 3 3
Oicnn.v it:::cssCA fr :3 1: :1 :1
Planted Stem Smmival S®marc Data Stems per Plot Ar e 0 Stems
.mug Stems ?'tved 41 55
Yeas 1 38 52 45 S` 0
Year' ?` 65 Y? 45'
Yen 3 33 53 'S 397
1'e-n -1 34 51 +? 3
Yeas. ;y 39 l3'
Percent Sunis'al Asera
year I
93° .
95° :
9:'' e
Ilea?
Yeas 3 9' e
yen . 'S.
_
]easi 67'.
°
Stems rAcre Asera
e
In is ?: nic Deusir. 948 94 8 S"
yen 1 9
' 'S: '84
year, 6 1:
3 6?' S13
`ien3 2 131: +S8 591
`"X- 889 i58 58,
Yen ` 66C SS8 487
!o!sice 4; 560 s v:n e c r '6.''a au " Saniiai based on infdal lanred srem corm!
Page 6 of 7 Caviness Site (Tibbs Run) (73) Closeout Summary
Hvdroloav
The data record from the monitoring reports of a neighboring site (The Deaton Site) indi-
cate that the surrogate gauge used likely produced 2 events in 2003, 2 in 2005 and 2 be-
tween 2006 and 2007 for a total of six possible overbank events. The monitoring firm in
2008 indicated evidence of 2 bankfull events on site in 2008. EEP personnel observed
what appear to be fresh alluvium on the upper part of the mainstem early in 2009 and evi-
dence of wrack above the floodplain elevation in the last month. See photos below.
Page 7 of 7 Caviness Site (Tibbs Run) (73) Closeout Summary
Alluvium-March 2009
Wrack-Se tember 2009
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