4.12. SR 04-17-2017 EGty1� ,.,�� Request for Action
River
To Item Number
Mayor and City Council 4.12
Agenda Section Meeting Date Prepared by
Consent Aril 17, 2017 Michael Hecker, Parks and Recreation Director
Item Description Reviewed by
Hillside City Park Trail Construction Cal Portner, City Administrator
Reviewed by
Action Requested
Approve,by motion, the construction of a natural surface single-track trail at Hillside City Park.
Background/Discussion
Within the Parks Improvement Fund, $63,000 was allocated for trail improvements at Hillside City Park.
The Minnesota Off-Road Cyclists (MORC) in cooperation with the city developed trail construction
specifications and solicited quotes for the construction of a natural-surface single-track trail at Hillside
Park. Two quotes were received. The lowest quote of$50,400 from YRU Contracting Inc. is
recommended. They plan to start construction in early July.
Construction will consist of approximately 18,500 LF of natural surface single-track trail built to an
approximate trail tread width of 30-inches. The trail construction will be on the east side of the park as
outlined in the construction specifications.
Financial Impact
$50,400 total project cost from the Park Improvement Fund.
Attachments
■ Purchase Order
■ YRU Quote and Construction Specifications
POWERED 6T
A IR
Purchase Order
No. _____
Please include P.O. # on invoice.
13065 Orono Parkway ● Elk River, MN 55330
763.635.1000 Phone ● 763.635.1090 Fax
Date Ordered: __________________________________________
To: _______________________________________________________ Ship to: ____________________________________
____________________________________________________________ _____________________________________________________________
____________________________________________________________ _____________________________________________________________
____________________________________________________________ _____________________________________________________________
QTY.
DESCRIPTION
UNIT
PRICE
TOTAL
BUDGET CODE
TOTAL COST →
Notice to Contractors
Invitation to bid
The Minnesota Off-Road Cyclists (MORC) on behalf of the City of Elk River, Minnesota (owner)
is soliciting bids for the construction of a natural surface singletrack trail at Hillside Park located
at 10801 181-Ave. N, Elk River, MN 55330. The City of Elk River shall be the primary hiring
agency.
Sealed bids will be received at the office of:
Michael Hecker
Parks and Recreation Director
City of Elk River
13065 Orono Parkway
Elk River, MN 55330
Bids will be accepted until 2:OOPM (Central) on Friday March 31, 2017.
Construction will consist of approximately 18,500LF of natural surface singletrack trail built to an
approximate trail tread width of 30 inches. This project shall be completed in 2017(no exceptions
unless approved by owner). The trail shall be constructed using the Trail Construction
Specifications document attached. Site map also attached.
Unit Price Bid Schedule
Item Unit Quantity Unit Price Extension
Mobilization LS 1 � 1000,L e �000® °
Singletrack Trail LF 18,500
Min. width 30" ).Lto q 1100
TOTAL BASE BID $ Soy L1O O r
DOLLARS AND Aa CENTS
(PRINr TOTAL BASE BID IN WORDS ABOVE)
Bidder: L R (tel Cc>',ira ,V%(h 1-1-�c
Address: O V1J : r La LA661,e $ C:
Signature: �- 1`0 w e Y`
TRAIL CONSTRUCTION SPECIFICATIONS
PART 1 -GENERAL
1.1 SUMMARY
A. This Section includes the following:
1. International Mountain Bicycling Association(IMBA) Guidelines
2. Trail Specifications
3. Mechanical Equipment Restrictions
4. Clearing and Grubbing
5. Trail Tread Construction
1.2 MEASUREMENT AND PAYMENT
A. Measurement and payment will be as indicated on the Proposal for Contract Work.
1. The Lineal Foot (LF) unit price shall constitute full
compensation for furnishing all material, extra equipment, labor, and
supplies and performing all operations necessary to construct the min-
imum tread width trail section set forth in the Contract Documents
and not specifically included in other pay items. The LF amount in-
cludes but is not limited to the following:
• Grubbing the trail clear zone;
• Excavating the tread;
• Manually finishing the trail tread and back slope;
• Constructing surface water control features;
• Constructing jumpable features alongside trail;
• Restoring areas adjacent to the trail disturbed by trail
construction; and
• All other associated work items and manual labor
required for construction of trail shall be consid-
ered incidental.
B. Any item or activity that is required and not specifically included in the above
pay items shall be considered incidental to the Total Unit Price Bid Amount.
1.3 IMBA GUIDELINES
A. All trail construction and associated work shall be in accordance with IMBA
guidelines unless the Contract Documents specify more stringent require-
ments.
B. The specifications provided in this Section were copied and, in some cases,
adapted directly from Trail Solutions:IMBA's Guide to Building Sweet Singletrack
1.4 BIKE-SPECIFIC TRAIL FLOW
A.All trails constructed as part of this project shall be natural surface singletrack trail that is purpose
built for mountain bicyclists,sometimes described as flow trails.A subset of the larger family of
rolling contour trails,flow trails share the following basic characteristics:
i. Synergy with the landscape: Making the most of what the natural terrain provides by
PART 2-PRODUCTS(Not Used)
PART 3 -EXECUTION
3.1 MECHANICAL EQUIPMENT RESTRICTIONS
A. Trails are to be constructed using manual labor and low impact mechanical equipment such as
mini-dozers, mini-excavators, and mini-skid steers.
1. Mechanized equipment including cutting blades or attachments shall not exceed 48 inches
in width. Removing trail anchors, such as trees that define the sides of the trail,to allow
the mechanical equipment to move more freely and efficiently will not be allowed. Visual
damage to vegetation, whether woody or herbaceous, must be avoided outside the trail
corridor.
2. Use and types of mechanical equipment, if any, furnished by the Contractor will need Owner
approval prior to construction.
3. Only Owner approved site access shall be used.
3.2 CLEARING AND GRUBBING
A. Tree Cutting Diameter Limits
1. All vegetation equal to or greater than 2 inches caliper at 6 inches above the ground may
not be cut down or removed without the consent of the Owner.
B. Trimming Branches
1. Branches shall be trimmed within the trail clearance zone and trail ceiling limits.
2. The practice of natural target pruning shall be followed when trimming branches.
C. Tree and Brush Removal
1. Vegetation within the trail tread must be dug out. Cutting the vegetation back to ground
within the trail tread is not acceptable as it may become dangerous when the trail tread
compacts. The hole shall be filled with non-organic material to match the surrounding
grade.
2. All other vegetation outside the trail tread must be cut back to 2 inches or less above grade.
3. All trees,brush,and stumps,and root wads shall be hand dragged a minimum of 30'from
edge of trail(or more in open areas). Cut ends shall face away from trail.Woody debris shall
be scattered to not exceed a height of 2 feet in height.All trees greater than 2"dbh to be
limbed on one side so tree lies flat on ground.
D. Clearing the Trail Tread
1. The trail tread shall be raked and the removed organic material placed uphill for use later.
3.3 TRAIL TREAD CONSTRUCTION
1. The Contractor shall typically follow the five basic steps below to constructing a full
bench-cut sustainable trail.
a. Step 1:Dig the Tread
1) The trail tread shall be constructed by cutting the entire specified trail width
into the side slope.The finished profile grade elevation is defined as the
existing ground at the compacted mineral soil elevation after removal of
organic materials.
b. A rolling grade dip incorporates a knick at the end of a long gradual dirt ramp. The
knick-like depression shall be longer than a bike whereas the ramp shall be 10 to 20
feet. The excavated soil shall be used to construct the ramp. Rolling grade dips shall
be placed in areas where the natural roll of the land or change in trail grade may need
to be accentuated. Rolling grade dips shall be constructed whenever surface water
control structures are needed unless the Owner approves a knick or other drainage
structures.
Profile and Oblique views of a Rolling Grade Dip:
;;n!!% _,
- '•� Knick outsiope 15%maximum
Ramp outsiope 5%
t,
.els 6
--------------
d$
----------I- �
Ramp Knick 6—10 feet
10—20 feet
Source: Trail Solutions:IMBA'Guide to Building Sweet Single Track,2004
C. A knick is a semi-circular, shaved section of the trail about 10 feet in diameter on the
downhill side of the trail tread. The center of the knick is outsloped at about 15%.A
knick is typically used where there is a low area for the water to drain to and where
water has or may tend to puddle.
Profile and Oblique views of a Knick:
Trail passes Natural or Placed
briefly through Barrier ; outslope 5%
fall line.
a Grade Reversals
7
Sideslope 7%
maximum
outslope 5%
`1 Grade Reversals
Keep turn radius as / 1,,.• f
wide as possible.
a ..
-r outslope 5%
Sideslope 7% Short section of the trail(the apex of the
maximum turn)lies directly in the fall line.
D. Insloped Turn
1. Orientation of the insloped turn should be like that of a climbing turn: The upper and lower
legs run along the contour, with the trail turning quickly and evenly through the fall line. By
building the insloped portion of the turn on the fall line, water is not trapped or otherwise
impeded as it flows downhill. An insloped turn should include a choke point and a grade
reversal on the upper leg of the turn. The choke point will help to slow user speed, and the
grade reversal will divert water off the tread before it hits the fall-line portion of the turn,
where it is likely to do the most damage.
2. The radius of an insloped turn should range between 10 and 15 feet, enabling the rider to
move through the turn without a significant change in speed.
s
Backslope blended with
insloped tread. Natural or Placed Barrier.
r
l �r
3 � r•a6 3 Grade Reversals
Insloped tread •�
through turn.
q.
Retaining Wall
Large drain allows trapped water to escape.
0,�5&
Grade Reversals
�b
Ur
Large drain allows trapped
water to escape.
Insloped tread i!r.
through turn.
Sideslope grade of
25°x6 or less is best.
Source: Trail Solutions:MBA'Guide to Building Sweet Single Track,2004
E. Rolling Crown Switchback
Profile and Oblique views of a Rolling Crown Switchback
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