PERMFILE100400

• Permit No: C1982056A
• IBM Index Class Name: Permit File
• Doc Date: 3/30/2005
• Section_Exhibit Name: 2.05 Operation and Reclamation Part 2
• Media Type: D
• Archive: Yes

compacted to 95% of AASHTO T-180. Engineers monitored [he embankment construction [o
• assure good compaction. The roadway foundation and gravel thickness were designed based on
the soil properties and method outlined in the Bureau of Mines Information Circular, iC 8758,
"Design of Surface Mine Haulage Roads - A Manual". The gravel base was spread and
compacted to 95% of AASHTO T-180, and is 12" thick. The gravel surfacing was spread and
compacted to 95% of AASHTO T-180, and is 6" [hick.
The haulroad was surfaced with gravel to form a durable road surface. The gravel characteristics
conform to follow the specification:
Screen Size Material Passive
1!h inch 100%
1 inch 75-95%
3/8 inch 40-75%
No. 4 mesh 30-60%
No. 10 mesh 20-45%
No. 40 mesh 15-30%
*No. 200 mesh 5-1 S%
*The haulroad was constructed according to the technical revision to permit C-82-056, approved
April 16, 1984. Certification for the Haulroad is contained in Exhibit 25, As-built Certifications
of Access/Haulroad and Haulroad.
Twentymile Coal Company will only continue to use a small segment of Haul Road A. This
segment is from the tipple to its' intersection with Haul Road C. Haul Road a was previously
• approved and certified in Colorado Yampa Coal permit number C-81-071 (formerly 179-77).
This information for Haul Road A is presented in Exhibit 250.
The existing Haul Road B, between Tipple 2 and the coal stockpile area at Twentymile Coal
Company, will be rerouted as shown on Map 24. The road, if it is to be used to transport coal,
will be reconstructed in accordance with the requirements in Rule 4.03.
Eastern Extension of Haul Road B
The eastern extension of the haul road is located immediately north of the refuse pile. The design
for the road is presented in Exhibit 25p.
Haul Road B Relocation
The relocated haul road is located out of any perennial or intermittent stream and any ephemeral
stream with a drainage area over 1 square mile.
As shown on Map 30A, the road meets the vertical alignment criteria. The road will be
constructed on spoil material that will be used to fill in a low area. This is a previously disturbed
area, and as such no topsoil is within the site. As can be seen from the maps the area has very
little topographic relief, therefore the lifts will not be required to be keyed into the side slopes.
Spoil material will be used to construct the fill. Organic material will be removed from the spoil
and [he spoil will be compacted in lifts. The lifts wi{I not exceed 36 inches in depth. The lifts
• will be compacted and tested per the specification contained in ASSHTO.T-99 or similar
publications. ,{11 ~ ^'? ~ „~ _. ~;~ l~PR 1 4 2000
TR 00-35 2.05-68 04/05/00