HomeMy WebLinkAbout01.09 Water Quality PlanWater Qualit, Plan
for
Tepee Park Forest Management Plan
Project Engineer: Tucker and Frase will employ a person (or persons) to
oversee the Road Construction and Timber Harvest Phase of the
Management Plan.
The Water Quality Plan is intended to give an overview of the necessary steps
required to protect the principal drainage, Beaver Creek, from sedimentation during
the road construction phase. Beaver Creek provides water for domestic purposes to
the town of Rifle. It is of primary concern that all reasonable and prudent actions be
undertaken to protect this resource.
TEMPORARY WATER POLLUTION CONTROL
Description: This work shall consist oemporary)measures needed to control water
pollution. These temporary measures 11._q_ILirl.GItide berms, dikes, dams, sediment
basins, fiber mats, netting, gravel, mulches, grasses, slope drains and other erosion
control devices or methods. These temporary measures shall be installed at the
locations where needed to control erosion and water pollution during the construction
of haul roads as specified in the Forest Management Plan (FMP).
Temporary pollution controls shall be coordinated with the permanent erosion control
features to the extent practical.
The Contractor shall control his operation in such a manner that the drainage from the
area of his activities will not cause th:'wa _ . . ' sf the principal drainage, Beaver
Creek, to exceed the permitted limit and other pollution defining criteria,
as specified by the Hydrologist for the City o = e.r
In the event of conflict between these requirements an porlution`6ontr6i laws, rules, or
regulations of other Federal, State, or local agencies, the more restrictive laws, rules or
regulations shall apply.
The requirements of this Water Quality Plan shall be adhered to on all project -related
activities, and not just those within the project limits. These activities include, but are
not limited to, temporary haul roads, borrow areas, temporary culvert installation,
pioneered roads, and clearing and grubbing operations.
Construction Requirements: The Tucker & Frase Supervising Forester, herein
after referred to as the "Forester", may direct the Contractor to provide immediate
permanent or temporary pollution control measures to prevent contamination of
adjacent streams, lakes, ponds, or other watercourses or water impoundment areas.
Tepee Park FMP
Water Ouality Plan, p0 1
The Contractor shall assign a full time Erosion Control/Water Quality
Supervisor whose responsibility will be to fulfill the obligations outlined below:
Have under his authority all necessary labor and equipment to direct and channel
new drainages which may develop on a daily or hourly basis into suitable
temporary pollution and erosion control features. This unit shall also be assigned
the responsibility of creating suitable temporary pollution and erosion control
features wherever necessary and of dismantling those features when their purpose
has been fulfilled. The area in which these features were constructed shall be
returned to a condition reasonably similar to that which existed prior to its
disturbance.
Be immediately available upon the Forester's request to implement necessary
actions to reduce any anticipated or presently existing water quality or erosion
problems resulting from construction activity. The criteria by which the Project
Engineer initiates this activity may be based on water quality data derived from
monitoring operations outlined in this plan or by any anticipated conditions (e.g.
predicted storms) which the Project Engineer believes could lead to unsuitable
water quality situations.
Be available to the Forester to implement suitable winter shutdown procedures as
directed and determined by the Forester.
The Erosion Control/Water Quality Supervisor shall be completely familiar with the
scope of the project. He or she shall have sufficient experience and training to
monitor the road construction operation through water samples and on-site
observations, detect any possible soil erosion problems that could lead to
sedimentation of the watercourse and have authority and expertise to take action to
rectify the problem. The Erosion Control/Water Quality Supervisor shall be familiar
with the dynamics of water run-off and sedimentation, pollution defining criteria
associated with water quality, the erosive characteristics of soil, and the tools and
methods available to control erosion and maintain water quality.
-?'S- . u mg: T e • • ractor shall prepare schedules for accomplishing temporary
d permanent erosion •ontrol work. These schedules shall be applicable to clearing
and grubbing, grading, bridges and other structures to control water, construction, and
surfacing; and shall be submitted at the pre -construction conference. He shall also
submit his proposed method of erosion control on haul roads and borrow pits and his
plan for disposal of waste material. Work shall not be started until the erosion control
schedules and methods of operation have been approved.
Included in this schedule should be information pertaining to a format for
communication (i.e. hourly, daily, weekly) between the Forester and the Contractor's
Erosion Control/Water Quality Supervisor covering matter such as:
His availability to the Project Engineer upon the latter's request?
How much time will be required to assemble the necessary men and equipment
from other aspects of construction?
Tepee Park FMP
Water Quality Plan, pg 2
How many men will be under the direction of the Erosion Control/Water Quality
Supervisor?
What units of equipment will be available and given priority for utilization in
constructing temporary pollution and erosion control features, or work related „
thereto?
Actions deemed necessary by the Forester shall be given high priority in implementing
necessary actions in controlling adverse water quality conditions. The Erosion
Control/Water Quality Supervisor, at the Forester's request, must make immediately
available all men and equipment judged appropriate be the Project Engineer to
maintain suitable water quality. These actions taken by the Forester take precedence
over any other aspect of project construction which has need of this same manpower
and equipment.
Approval of the Contractor's plan shill) not relieve the Contractor of the responsibility
for operation and maintaining temporary pollution and erosion control features in a
safe and systematic manner and for repairing at his expense any damage to, or failure
of, the pollution and erosion control features.
Monitoring: In order to assure adherence to this Water Quality Plan, the Erosion
. Control/Water Quality Supervisor will collect samples from the principal drainage, a
A/ minimum of once weekly. Samples will be taken more frequently as climatic conditions
rte, dictate, such as during and after summer thunderstorms. Samples will be collected
above and below or at other designated locations within the construction area which
�' may have impact on the water quality of the principal drainage. Turbidities of these
samples will be measured on a device approved by the City of Rifle.
Data collected from this monitoring will be made available to other agencies upon
request.
Negligence: Temporary erosion and pollution control measures required due to the
Contractor's negligence, carelessness, or failure to install permanent controls as a part .
of the work as scheduled, shall be performed by the Contractor at his expense.
Tepee Park FMP
..Nater Quality Plan, pg 3
BEST MANAGEMENT PRACTICES
a . Where a road section which is greater than 100 feet in length crosses slopes
greater than 65%, placement of fill is prohibited and placement of sidecast shall
be minimized to the degree feasible.
b. On slopes greater than 50%, where the length of road section is greater than
100 ft., and the road is more than 15 ft. wide (as measured from the base of the
cut slope to the outside of the berm or shoulder of the road) and the fill is more
than 4 ft. in vertical height at the road shoulder for the entire 100 feet, the road
shall be constructed on a bench that is excavated at the proposed toe of the
compacted fill and the fill shall be compacted.
c. Roads shall he constructed so no break in grade, other than that needed to
drain the fill, shall occur on through fill; breaks in grade shall be above or below
the through fill, as appropriate. Where conditions do not allow the grade to
break as required, through fills must be adequately protected by additional
drainage structures or facilities.
d. Through fills shall be constructed in approximately one foot lifts.
e. On slopes greater than 35 percent, the organic layer of the soil shall be
substantially disturbed or removed prior to fill placement. An exception may be
proposed by the contractor where it is justified that the fill will be stabilized.
f. Excess material from road construction and reconstruction shall be deposited
and stabilized in a manner or in areas where downstream beneficial uses of
water will not be adversely affected.
Drainage structures and facilities shall be of sufficient size, number and location
to carry runoff water off of roadbeds, landings and fill slopes. Drainage
structures or facilities shall be installed so as to minimize erosion, to ensure
proper functioning, and to maintain or restore the natural drainage pattern.
Permanent watercourse crossings and associated fills and approaches shall be
constructed where feasible to prevent diversion of stream overflow down the
road and to minimize fill erosion should the drainage structure become
plugged.
h. Where there is evidence that soil and other debris is likely to significantly
reduce culvert capacity below design flow, oversize culverts, trash racks, or
similar devices shall be installed in a manner that minimizes culvert blockage.
Waste organic material, such as uprooted stumps, cull logs, accumulations of
limbs and branches, and unmerchantable trees, shall not be buried in road fills.
Wood debris or cull logs and chunks may be placed and stabilized at the toe of
fills to restrain excavated soil from moving downslope.
g•
1•
Logging roads shall be constructed without overhanging banks.
Tepee Park FRP
Water Quality Plan, pg 4
k. Any tree over 12 in. d.b.h. with more than 25% of the root surface exposed by
road construction, shall be felled concurrently with the timber operations.
I. Sidecast or fill material extending more than 20 ft. in slope distance from the
outside edge of the roadbed which has access to a watercourse or lake which is
protected by a WPZ shall be seeded, planted, mulched, removed, or treated as
specified in the management plan, to adequately reduce soil erosion.
m. All culverts at watercourse crossings in which water is flowing at the time of
installation shall be installed with their necessary protective structures
concurrently with the fill, construction and reconstruction of logging roads. Other
permanent drainage structures shall be installed no later than October 15. For
construction and reconstruction of roads after October 15, drainage structures
shall be installed concurrently with the activity.
n. Drainage structures and drainage facilities on logging roads shall not discharge
on erodible fill or other erodible material unless suitable energy dissipaters are
used.
o. Where roads do not have permanent and adequate drainage, the waterbreak
specifications on page 62 shall be followed.
p. Drainage facilities shall be in place and functional by October 15. An exception
is that waterbreaks do not need to be constructed on roads in use after October
15 provided that all such waterbreaks are installed prior to the start of rain that
generates overland flow.
No road construction shall occur under saturated soil conditions except that
construction may occur on isolated wet spots arising from localized ground
water such as springs, provided measures are taken to prevent material from
significantly damaging water quality.
r. Road construction not completed before October 15 shall be drained by
outsloping, waterbreaks and/or cross -draining before the beginning of the
winter period. If road construction does take place after October 15, roads shall
be adequately drained concurrent with construction operations.
s. During the winter period if seasonal seeps result in portions of a haul road
becoming unstable, the Forester or Erosion Control/Water Quality Supervisor
shall be contacted to conduct an on site inspection. If it is of minor extent, that
portion will be surfaced with rock in depth and quantity sufficient to maintain a
stable road surface throughout the period of use. If the seep is of more serious
nature, activity shall be suspended until a culvert is properly installed so the
water can be adequately passed below the road.
q.
Tepee Park FMP Water Quality Plan, pg 5
t. Slash and other debris from road construction shall not be bunched against
residual trees which are required for silvicultural or wildlife purposes, nor shall it
be placed in locations where it could be discharged into a watercourse.
u. Road construction activities in the WPZ. except for stream crossings or as
specified in the TrIP. shall be prohibited.
v. A gravel base (minimum: 4 inches deep x 12 feet wide) shall be installed on
road surfaces over culvert installations for a minimum of 35 feet each side
of culvert .
SOIL STABILIZATION MEASURES
1. All waterbreaks shall be installed no later than October 15 of the current year of
timber operations
2. Waterbreaks shall be constructed immediately upon the conclusion of the use of the
tractor roads, roads, and landings which do not have permanent and adequate
drainage facilities (rolling dips) or drainage structures(culverts)
3. Waterbreaks shall be maintained during the entire period of timber operations and
shall be constructed and maintained in effective working condition to provide
erosion protection for at least 1 year following the completion of harvest activities.
4. Waterbreaks shall be located to allow water to be discharged into some form of
vegetative cover, slash, rocks or less erodible material and shall be constructed to
provide for unrestricted discharge at the lower end of the waterbreak so that water
will be discharged and spread in such a manner that erosion shall be minimized
5. Waterbreaks shall be cut diagonally a minimum of 6 inches into the firm roadbed or
skid trail and shall have a continuous firm embankment of at least 6 inches in
height at the lower edge of the waterbreak cut.
Distances between waterbreaks shall be based on the Erosion Hazard Rating (EHR)
of low, moderate, high and extreme (see Erosion Hazard Rating Map).
Max. distance between waterbreaks for EHR of:
% gradient Low Moderate High Extreme
10 or less 300 200 150 100
11-25 200 150 100 75
26-50 150 100 75 50
over 50% 100 75 50 50
Tepee Park FMP
Water Qua* Plan, pg 6
INVENTORY OF MATERIALS FOR TEMPORARY EROSION CONTROL
The following is a list of the minimum amounts and kinds of materials that must be
kept on site both during the- construction phase of the roads and harvesting activity in
the Beaver Creek drainage. Please note that this material is not to be used for the
scheduled permanent erosion control. This material is to be used for immediate
response to unforeseen events that will cause or is causing erosion into the
watercourse; i. e. for implementing temporary erosion control measures.
Amount Type of Material
60 bales straw
120 re -bar 1/2" x 48" (bale stakes)
Ten rolls 6 mm plastic liner, 100' x 10'
300 feet filter fence*
50 steel T -posts 48"*
2 CMP 12" x 20'
1 CMP 18" x 20'
100 feet flexible plastic pipe 6"
10 cu. yds. rip -rap rock
10 cu. yds. 1 1/2" drain rock
100 feet ground stabilization (non -woven) fabric 10 feet wide
100 feet ground stabilization (woven) fabric 20 feet wide
* A pre -fabricated silt fence, e.g. ENVIROFENCE may be substituted for these two
items.
Tepee Park FMP Wafer Quality Plan, pg 7