1. Using the Torne Valley plans and the attached USGS topo map (1"=1000"), delineate and determine the drainage area for each cross culvert to be replaced:
|
Approx. Loc. |
Exist. Size/Length |
Inv. In |
Inv. Out |
Comments |
|
Sta 29+00 |
15" CMP / 30' |
300.78 |
299.55 |
Abandon in place |
|
Sta 35+00 |
18" CMP / 35' |
308.54 |
306.66 |
|
|
Sta 42+55 |
18" CMP / 25' |
297.36 |
295.36 |
|
|
Sta 46+25 |
36" CMP / 40' |
296.09 |
295.31 |
Poor condition |
|
Sta 48+60 |
15" CMP / 40' |
299.37 |
297.48 |
To culv @ 46+25 |
|
Sta 54+80 |
18" CMP/ 35' |
n.a. |
302.66 |
To culv @ 46+25 |
|
Sta 59+45 |
48" CMP / 40' |
307.91 |
304.91 |
|
|
Sta 61+05 |
48" RCP / 50' |
306.88 |
306.20 |
|
|
Sta 77+00 |
48" CMP / 60' |
374.0+/- |
372.0+/- |
To culv @ Sta 61+05 |
|
Sta 92+00 |
48x48RCB / 60' |
450.9 |
450.4 |
|
|
Sta 94+15 |
36" CMP/ 32' |
451.80 |
450.55 |
Not structurally sound |
|
Sta 94+15 |
30" CMP / 32' |
452.81 |
451.25 |
Not structurally sound |
Red indicates stations at which culverts were replaced with new culverts.
2. Using Chapter 8 of the Highway Design Manual, determine the design frequencies to be used for analyzing the proposed cross culverts and the roadside ditches.
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