20190560 Ver 1_Maintenance Plan_20190618

Maintenance Plan
Bradley Creek Reservoir
Pisgah National Forest, Henderson County, North Carolina
Prepared by C1earWater Environmental Consultants, Inc.
June 18, 2019
In accordance with the terms and conditions of the US Forest Service Special Use Permit, the
Permit Holder, City of Hendersonville (City), is required to comply with established federal and
state laws for the operation and maintenance of the permittedse. With this, the following
maintenance requirements are hereby incorporated by reference to ensure that all construction and
maintenance activities comply with Forest Service StaqdardsJL
The Bradley Creek Reservoir is a concrete dam with an upstream oir located within Pisgah
National Forest and is a water source for the City's water treatment located in Mills River,
NC. The reservoir was constructed in 1927. The City has an active 20-y ase with the National
Forest Service to operate the existing water supply reservoir 112032.
This maintenance plan has been prepared for the proposed dredging and mainfWance project to
occur in the summer of 2019 as well as on-going maintenance work for the lifetime of the lease
held between the City of Hendersonville Snhe F rest Service.
A. CONTACT IN TION
City of Hendersonvi ater Treatment rty is ocated a 9 Haywood Road, Mills River,
NC 28759. The main p on umber for contacting these individuals is [phone]. Individuals
who work on distribution ines, raw water intake lines will be employed or contracted by
Hendersonville Water and Sewer, an enterprise department of the City. Work on transmission lines
will include a variety of field operations personnel.
Individua re onsible for these field operations personnel are:
• Lee (utilities director) - [phone]
• Andy B n (operations manager) - [phone]
• Ricky Levi P manager) — [phone]
B. 2019 MAINTE CE PROJECT
The project will encompass dredging of excess sediment to be removed from reservoir thus
restoring the water storage capacity behind the dam. This reservoir was last dredged in
approximately 1994 or 1995. A Pre -construction meeting will be held prior to any work between
the City of Hendersonville, C1earWater Environmental, US Forest Service Supervisor, and
additional appropriate permitting agencies.
Plastic barriers filled with water, plastic sheeting, and sandbags will be installed to divert the
Bradley Creek to an existing upstream diversion channel as indicated on Figure 4. The bypass
channel is believed to be the original stream bed prior to the construction of the concrete dam. The
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bypass channel has been used multiple times in the past when dredging has been performed, (see
the Permit Dredging Impact Plan from 1994 — Attachment B). Upon approval, the bypass channel
entry point will be opened using a medium-sized, long reach excavator.
Once water is diverted to the bypass channel, a mechanical pump will be used empty the reservoir.
The water will be pumped below the dam. During removal of water from the reservoir, the water
pumped will be sent through a geo-textile filter bag to maintain low levels of turbidity, not to
exceed 10 NTUs (Nephelometric Turbidity Units) from baseline levels. The pumping system will
also include a screen to prevent aquatic life from being harmed.
The intake velocity of the temporary pump shall be less than oot per second. This pump will
also be used to maintain low levels of water in the reservoir during dredging. The pump will
continue to run, as necessary, during dredging operations to keep reservoir dry.
The dredging work will be conducted with the same excavator m tinned above. The excavator
will dredge the reservoir to a depth of approximately 4-8 feet. The excavator will unload the
dredged material into a dump truck using one motion. The dredged material will then be hauled
offsite in a dump truck to an upland farm area outsid of the Forest Se oundary.
The upland Droiect boundary will utilize silt fencins to ini ize sediment runo
The City will have an engineer on-site during the dewatering process to immediately inspect the
condition of the existing valve to oversee maintenance if neede .
C. AQUATIC LI LOCATION
or
Remaining aquatic life will be relocated using nets and buckets in water to an area immediately
downstream of the project area. Wildlife such as crayfish, turtles and salamanders will be relocated
to non -fast flowing pools either up or downstream of the dam. Once the water is drained and the
aquatic life is safely removed and relocated the dredging operation will begin.
The North Carolina Wildlife Resources Commission will be notified 2 weeks prior to dewatering
and dredging project.
D. LANDSCAPE AND EROSION CONTROL
The Permit Holder or their Contractor shall take necessary measures to prevent and control soil
erosion within the right-of-way and on adjacent lands that might be affected by construction,
operation, or maintenance of the use; and shall revegetate, and keep revegetating all areas of soil
made bare by these activities, and shall constrain eroded material within the construction limits.
To meet this objective the Permit Holder or Contractor will accomplish the following provisions
during construction.
Establish and maintain a vegetative cover on all earth cut and fill banks on all mixed earth
and rock banks which have enough soil due to construction.
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2. Seeding as construction progresses using a wild seed mix. A temporary cover crop will be
established if there is a conflict in planting season. A permanent cover crop will be
established at the first approved time of planting.
3. Completing all seeding and mulching within 30 days of construction during the seeding
season, unless drought conditions prevail.
4. Using a seed mixture adapted to soil, climate, and season. Mulching with pine straw.
5. Seed bare soils within 100 feet of riparian area the same day as completion of soil
disturbance.
E. VEGETATION CLEARING
The Permit Holder, or their contractor and subcontractors will conform to the following Clearing
Plan: 1W 1W
1. The maximum clearing and grubbing limits are to be set at 5 feet outside actual construction
lines except that cutting of hazard trees outside these limits may be done with approval.
Construction machinery is to be contained within the clearing limits. owever, no clearing
shall be done outside the south right-of-way limits.
2. If during the clearing phase construction endangered, threatened, nsitive species
are encountered, the Forest or will be notified before clearing pr ceeds.
F. CULTURAL RESOURCES
If during construction or maintenance activities archaeolog es are discovered, activities will
be immediately suspended, and the US Forest Service Supe isor will be notified. Prior to
resuming activities, each site will be evaluated by a professional archaeologist using the National
Register ;o1f Places, criteria of significance, using known data.
If archaeological site testing is required to evaluate significance, and the construction project
cannot be moved so that no adverse effect will occur to the cultural resource, the Permit Holder
will notify thSreaq
Forest Service Supervisor for consultation before construction begins or
resumes.
All activitiesringmodifications to National Register listed or eligible sites will be
coordinated by the Forest Service and the Advisory Council on Historic Places and the State
Historic Preservation Officer, whether under easement or not.
Testing or mitigating National Register sites will require a 1906 Antiquities Act permit, authorized
by the Regional Forester and the Smithsonian Institution. The permit shall be sought prior to any
investigations of this order.
A report describing the sites found, their significance, and the judgments used to arrive at
significant determinations, will be prepared by the public road agency's professional archaeologist
and submitted to the US Forest Service Supervisor for review.
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A "site" is defined as more than two artifacts in close proximity and older than 50 years.
G. FIRE PROTECTION
During the period of construction, the Permit Holder shall both independently and in cooperation
with the Forest Service, do everything that is reasonable and practical to prevent and suppress
forest fires on the project area and in its immediate vicinity. All contracts and subcontracts shall
include provisions requiring contractors, subcontractors, and their respective employees to do
likewise. The Permit Holder, their contractors, and subcontractors will conform to, but not be
limited to, the following Fire Plan: Ar
1. Take immediate independent or cooperative action to control and extinguish any fire,
regardless of cause, within the easement area and its vicinity.
2. Provide adequate spark arrestors acceptable to the US Forest Service Supervisor on all
steam and internal combustion engine4, including tractors, trucks power rollers, power
shovels, and chain saws. The use of welding equipment, cutting torches, and similar
flammable equipment must be done in an area cleared of all vegetation, leaves and debris.
Power saws shall not be re ed
r while hot and shall be refueled in a dway or other
cleared area.
3. When the Forest Service advises e tate that local fire weather conditions are becoming
critical, the Permit Holder shall always keep gasoline chain saws, a shovel, and take
precautionary meas es requested by the Forest Service.
H. ANNUAL E
NqN
After the 2019 maintenance project is complfethe City will conduct annual inspection and
maintenance of th ater intake and gate valve structure. Maintenance on the road and distribution
lines includes a variety f activities at different times.
1-40
1. Water Intake and ate Valve Structure
The Town will open and close the valve on an annual basis to determine if the valve is in operable
condition. The town will conduct a visual inspection of the water intake to determine if any
dredging work will need to be permitted to maintain the water intake capacity.
2. Trimming of Foliage
Trimming foliage out of the road rights-of-way is normally done in April — October time frame
annually. This task is accomplished using the flail mower to trim last summer's growth on banks
of the road. Weed -eating and mowing grass cutting will be done with weed -eating trimmers and
lawnmowers (both riding and push). Use of chain saws to remove fallen trees, dead limbs and
debris encroaching into roadways is a routine activity. If culverts become clogged with debris
preventing drainage (on access road), the debris is removed as needed to prevent erosion of the
roadbed.
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3. Dam Maintenance
Some form of masonry work on the dams could be required from time to time. Bradley Creek dam
activities may require that the creek to be forded below the dam. The Bradley Creek dam requires
maintenance in the form of tree removal from the overflow, removal of accumulated debris at the
screens, and valve repair/ replacement as required.
4. Transmission Line Maintenance
Repair and replacement work performed on the transmission lines inside the national forest,
supplying water to the City's water treatment plant, will require that heavy construction equipment
ford the surface waters at locations adjacent to said transmission lines, as may be required.
Transmission line rights-of-way maintenance will be performed once every three to five years and
will normally be conducted in the late fall after leaves have fallen (not during hunting season) or
during early spring prior to the onset of vegetative growth. Equipment and tools to complete this
task are much the same used in the right of way on the Forest Service Roads. Components of the
water line (pipe, nuts bolts, etc.) will be removed from the area once the repair is made. Repairs to
the area will be done as outlined in this permit. Addition of stone to the roadbed is done as needed.
No wood or articles found in the forest are removed during any of these activities.
5. Riparian Areas IdhhI NWO
Under no circumstances shall motorized vehicles or heavy equipment be utilized o f existing roads,
within riparian areas or within the 100 -foot buffer zones without prior approval from the US Forest
Service Supervisor. 1%
6. Use of Roads and Trails
The permit holder will access utility corridor utilizing exis ads and trails. The use of heavy
equipment is prohibited unless autho ized in advance by the U orest Service Supervisor.
Prior approval by the US orest Service Supervisor is required for the use of utility or all -terrain
vehicles on areas other tkan system roads. The City does employ the use of ATV's in the carrying
of tool, fuel and personnel in the maintenance of roads and dams.
7. Emergency SituatiNrep
During emergency outags larealowed without the advance notification required under
Section II (a) of the Operating Plan. Upon completion of repairs, the US Forest Service Supervisor
or the permit administrator Linda Aiken shall be notified of such emergency repair work within
48 hours. All other work must be on maintenance schedule submitted to the Forest Service each
year. IW
8. Water Usage by the City of Hendersonville
The City has three water sources, two of which are within the Pisgah National Forest: Bradley
Creek Reservoir and North Fork Reservoir. Water used by the City is recorded daily by water
treatment plant operators. Operators also monitor and record the flows from USGS Sites at Mills
River, Davidson River and French Broad River. During the summer, and under drought conditions
when flows are historically low, City personnel physically check the flow over the dams at least
once every two weeks or more often if conditions deteriorate. At a flow of 70 cubic feet per second
(cfs) at the Mills River USGS Site, physical monitoring activity will begin. At 40 cfs, the flow
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from the two dams will be restricted or reduced. Normal combined usage from the two sources
within the Pisgah National Forest is 8 cfs, approximately 5 million gallons per day. When the flow
is reduced per the numbers listed above only 250,000 gallons to 500,000 gallons will flow from
the two sources through the pipes, 0.77 cfs maximum. This allows for flow in the pipes to prevent
sediment from being deposited within the transmission lines.
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