layout, design and construction handbook - California Department of ...

Section 2. Launching Ramps
201. General Requirements
A. Standard launching lane widths:
1. 15’ on launching ramps of two (2) or more
lanes.
2. 16’ to 20’ on single lane launching ramps.
Generally, single lane launching ramps are
not practical, particularly if they are over
100’ in length. They can be difficult to use
because of their narrowness, particularly for
the inexperienced boater. However, in the
case of low use remote sites, and extreme
low water ramp extensions of multi-lane
facilities, single lane launching ramps may
be appropriate. The recommended width is
20’, but shall be not less than 16’.
B. The number of launching lanes will be dictated
by demand and by the characteristics of the site.
One launching lane will handle up to 50
launchings and 50 retrievals per day at a well
designed and operated facility.
C. On all launching ramps over 200’ long and less
than 60’ wide (4 launching lanes), a 60’
minimum diameter turn-around area should be
provided every 200’ to minimize car-trailer
backing distances.
D. The head of ramp should be constructed to an
elevation not less than 1’ above design high
water.
E. The toe of ramp should be constructed to an
elevation not less than 3’ below design low
water.
a. It is suggested that 25 year water
level averages be used to establish
design high water and design low
water for launching ramps
5
Figure 3. Standard Launching Lane Width
Figure 4. Turn-Around Area
Figure 5. Ramp Head & Toe Details