Amendment_A001.pdf

Jeremiah.Rogers Typewritten Text

Jeremiah.Rogers Typewritten Text

UNDERDRAINS

GEOCOMPOSITE

STANDARD AND

1.

3.

impermeable material (A4 - A7 soil).

Fill and compact the top 12" of the trench with or gradient is required at the outlet.

to the roadway, unless solid rock is encountered, otherwise. Construct the flowline gradient parallel

Install underdrain at a 5' depth unless shown

Co lle ct or P ip e

Pe rfo ra te d

6" D ia m et er

H

S e e N o te

1'

30" m in m a x

H

±2

0' (M ax

Or Stapled

Min. Unless Sewn

Overlap 3" as appropriate).

(Skew in the direction of flow

Pipe Drain to Fill Side of Road

6" Diameter NON PERFORATED Outlet

605-A

NO SCALE

El bo w s

Se e

Not e

Min. Gradient = 2.0%

Min. Trench Width

OUTLET PIPE

OUTLET PIPE

STANDARD UNDERDRAIN

S e e N o te

Underdrain

Perforated connection to outlet pipe tee or wye for

Use prefabricated

Min.

Outlet Pipe

Variable Slope

Subgrade Shoulder

STANDARD UNDERDRAIN OR GEOCOMPOSITE UNDERDRAIN LOCATION

S e e N o te

Flow

Collector Pipe

Perforated

Backfill

Geocomposite sheet drain

OUTLET PIPE DETAIL

Sh ee t D ra in

Ge oc om po sit e of s he et d ra in s.

to a llo w ab ut m en t th e co lle ct or p ip e

Sh or te n an d ca p

GEOCOMPOSITE UNDERDRAIN

2.

4.

Use the minimum width required for installation.

5.

6.

7.

For Thicknesses

Refer To Typical Section

NOTE:

See Note 2

Ditch

Backfill

Granular

T5

Type B

Class 2 Non-woven, Geotextile requirements of subsection 708.04.

Furnish collector pipe, outlet pipe & fillings meeting the of subsection 714.02.

Furnish geocomposite sheet drain meeting requirements item 60501-0000.

or other suitable marker. Markers are subsidiary to pay

Mark the outlet of the underdrain with a delineator post with standard coupling bands or by other approved means.

to Subsection 605.03.Hold the screen securely in place

Cover the end of the outlet pipe with screen according

1 Amendment 0001 - Nov. 17, 2016

STATE PROJECT

A

M N C

O R o a d w a y C

A D

D S h e e ts T s p A .d g n

CENTRAL FEDERAL LANDS HIGHWAY DIVISION

FEDERAL HIGHWAY ADMINISTRATION

U.S. DEPARTMENT OF TRANSPORTATION

CENTRAL FEDERAL LANDS HIGHWAY DIVISION

FEDERAL HIGHWAY ADMINISTRATION

U.S. DEPARTMENT OF TRANSPORTATION

SPECIAL

U.S. CUSTOMARY SPECIAL

U s e r S ta c y .D ic c ic c o

NUMBER

SHEET

CO

COTTONWOOD PASS ROAD

CO FLAP 209(1)

Jeremiah.Rogers Typewritten Text Amendment A001 11/17/2016

Jeremiah.Rogers Typewritten Text

CENTRAL FEDERAL LANDS HIGHWAY DIVISION

12300 WEST DAKOTA AVENUE, SUITE 360

LAKEWOOD, COLORADO 80228

ATTENTION: JEREMIAH ROGERS

1:

Remove page T5 and replace with new T5. A change was made to the underdrain detail.

*FAILURE TO ACKNOWLEDGE THIS AMENDMENT IN BLOCK 19 OF THE SF 1442 BY THE DESIGNATED DATE AND HOUR SPECIFIED IN THE SOLICITATION MAY RESULT IN REJECTION OF YOUR BID (REFER TO ITEM 11.)