Supplemental Specs _C_x.pdf

SECTION 025251 -WATER SUPPLY WELL ABANDONMENT

PART 4 - GENERAL

4.1 SUMMARY

A. This Section includes the following:

1. Water supply wells Abandonment.

4.2 DEFINITIONS

A. Water Well Abandonment Includes abandoning existing well, appurtenances, including pump, piping, casing to 36” below ground surface and concrete slab.

4.3 SUBMITTALS

A. The Contractor shall provide the following:

1. Submit registration report form and any applicable fees to the Department of Natural

Resources (DNR), Wellhead Protection Section.

2. Well Abandonment Log.

3. Abandoned well GPS location to horizontal accuracy of 50’.

4. Digital picture of abandoned well site, before and after.

4.4 WELL ABANDONMENT

A. Contractor must be a permitted drilling or pump installation contractor.

B. Comply with AWWA A100 when abandoning water supply wells. Fill and seal holes and casings, remove casing to 36” below ground level, remove any items in the well, any well slab, and restore ground surface to finished grade.

C. Follow well-abandonment regulation of the EPA and MoDNR specifications10 CSR 23-3.110

Plugging of Wells (Attachment A). Restore ground surface to finished grade.

PART 5 - PRODUCTS

A. Neat Cement: A mixture of one 94 lb. of Portland Type I cement mixed with 5 ½ to 6 gallons of clean water. No sand or gravel is permitted to be added.

B. Bentonite Chips: Any type of sodium bentonite clay used in well construction, or plugging of wells, which swells or expands when water is added.

C. Fill Material: Gravel, sand, varied sized agricultural lime or other approved material.(CIM-

0900-4F-734-0905-01) Region Wide Water Solar Well Pump and Removal of Abandoned

Wells

PART 6 - EXECUTION

6.1 PREPARATION

A. Well Data, Location, depth and size of casing and well contents:

1. Item #1 (Pinewoods Recreation Area): Location: T26N, R3E, Sec 7. GPS: N36 Deg.

55.336’, W090 Deg. 46.421’.

a. Well #1; Casing Diameter is 6”. Depth of well is estimated at 375’. Depth of piping is unknown. Well enclosed by building, approximately 8’ x 10’.

Building to remain in place. Pump to be removed.

2. Item #2 (Debby Kelly Property): Location: T25N, R3W, Sec 18. GPS: N36 Deg.

49.964’, W091 Deg. 19.971’.

a. Well #1; Casing Diameter is 6”. Depth of well is estimated at 281’. Depth of piping is unknown.

3. Item #3 (Davis Trust Property): Location: T26N, R4W, Sec 23, 25. GPS: N36 Deg.

53.236’, W091 Deg. 20.160’.

a. Well #1; Casing Diameter is 6”. Depth of well is estimated at 99’. Depth to water is estimated at 6’. Depth of piping is unknown.

4. Item #4 (Upper Bateman Property): Location: T24N, R17W, Sec 27, 34. GPS: N36

Deg. 43.656’, W92 deg. 48.414’ (See Site Sketch, Attachment: B).

Well #1; Casing Diameter is 6” (clay pipe casing). Depth of well is estimated at 60’. Depth to water is estimated at 8’. Depth of piping is unknown.

5. Item #5 (Cedar Ridge Baptist Property): Location: T23N, R18W, Sec 34. GPS: N36 deg. 37.855’, W92 Deg. 55.101’.

a. Casing Diameter is 6”. Depth of well is estimated at 50’. Depth to water is estimated at 13’. Depth of piping is unknown. Concrete slab, approximately 2’ diameter around well.

6. Item#6 (Shell Knob Recreation Site): Location: T22N, R25W, Sec 13. Lat: 36 36 44.9

N Long: 93 35 44.8 W.

a. Casing Diameter is 6”. Depth of well is estimated at 716’. Static water level is 261’. Depth of piping is 398’. Small, approximate 5’x5’x4’ (High) protective shed around well with pump to be removed.

7. Item #7 (Hanks Place Property): Location: T33N, R10W, Sec 27. GPS: N37 deg.

31.825’, W92 deg. 01.502’ (See Site Sketch, Attachment: C).

a. Well #1; Casing Diameter is 6”. Depth of well is estimated at 114’. Depth to water is estimated at 40’. Depth of piping is unknown. Well is located behind the house under a 55 gal. drum top.

8. Item #8 (Kofal Property): This is a Culturally Significant Site. Location: T33N, R10W, Sec 9, 10. GPS: N37 deg. 34.635’, W92 deg. 01.796’ (See Site Sketch, Attachment: D).

a. Well #1; Casing Diameter is 6”. Depth of well is estimated at 230’. Depth to water is estimated at 16’. Depth of piping is unknown. Well is located along fence line running perpendicular to access road and has pump to be removed.(CIM-0900-4F-734-0905-01) Region Wide Water Solar Well Pump and

b. Cistern #1; Cistern Diameter is 2’. Depth of cistern is estimated at 20’.

Depth to water is estimated at 5’. Cistern is surrounded by concrete slab, approximately 4’ x 4’.

9. Item #9 (Roby Lake): Location: T33N, R11W, Sec 35. GPS: N37 deg. 31.322’, W92 deg. 07.086’ (See Site Sketch, Attachment: E).

a. Well #1; Casing Diameter is 6”. Depth of well is estimated at 128’.

Estimated 60’ to partially collapsed hole. Depth of piping is unknown.

10. Item #10 (Banta, Sunnen Property): This is a Culturally Significant Site. Location:

T37N, R1W, Sec 18. GPS: N37 Deg. 55.050’, W091 deg. 04.570’.

a. Well #1; Casing Diameter is 6” (PVC casing). Depth of well is estimated at

160’. Depth to water is estimated at 27’. Depth of piping is unknown.

b. Cistern #1; Rock lined, Diameter is 3’. Depth of cistern is estimated at 16’.

Depth to water is estimated at 6’.

11. Item #11 (Dunlap Property): Location: T33N, R2W, Sec 16. GPS: N37 Deg. 32.984’, W091 Deg. 09.937’.

a. Well #1; Casing Diameter is 12”. Depth of well is estimated at 11’. Depth of piping is unknown.

b. Well #2; Casing Diameter is 7”. Depth of well is estimated at 20’. Depth of piping is unknown. Concrete slab, approximately 3’ x 5’ around well with hand pump to be removed.

12. Item #12 (Cedar Creek #1 – CR354): Location T47N, R11W, Sec 27. GPS: N38 Deg.

49’ 57.8”, W092 Deg. 08’ 18.8”.

a. Cistern #1; Diameter is 3’ (Rock lined). Depth of cistern is estimated at 16’.

Depth to water is estimated at 6’.

13. Item #13 (Cedar Creek #2, Middle River Site - Compartment 9): Location T46N, R10W, Sec 14. GPS: N38 Deg. 45’ 48.1”, W092 Deg. 00’ 51.1”.

a. Cistern #1; Diameter is 4.5’. Depth of cistern is estimated at 18’. No water encountered.

6.2 ABANDONMENT

A. Remove and dispose of any appurtenances in the well.

B. Remove and dispose of well slab, if present.

C. Remove and dispose of well casing to a minimum of 36” below ground surface.

D. Abandon well as per AWWA100, MoDNR specifications10 CSR 23-3.110 Plugging of Wells

(Attachment A) and EPA requirements and to the following depths.

1. Item #1 (Pinewoods Recreation Area):

a. Well casing to be cut flush with concrete slab. Plug well full length with neat cement grout introduced through a tremie pipe.

2. Item #2 (Debby Kelly Property):

a. Plug well full length using 43 bags of neat cement or 90 bags of coated bentonite pellets designed to fall through standing water.(CIM-0900-4F-734-0905-01) Region

Wide Water Solar Well Pump and

3. Item #3 (Davis Trust Property):

a. Plug well full length using 28 bags of bentonite chips or 15 bags of neat cement.

4. Item #4 (Upper Bateman Property):

a. Plug well full length using 18 bags of bentonite chips or 11 bags of neat cement.

5. Item #5 (Cedar Ridge Baptist Property):

a. Plug well full length using 15 bags of bentonite chips or 9 bags of neat cement.

6. Item #6 (Shell Knob Recreation Site):

a. Well may be plugged as follows: From the bottom of the well (716 feet below land surface) to 100 feet below the bottom of the casing (498 feet below land surface), the well can be filled with washed, disinfected pea gravel. From 100 feet below the bottom of the casing (498 feet below land surface) to 100 feet above the bottom of the casing (298 feet below land surface), the hole shall be filled with neat cement grout introduced through a tremie pipe. From 100 feet above the bottom of the casing (298 feet below land surface) to 50 feet below land surface, the casing can be filled with washed, disinfected pea gravel. From 50 feet below land surface to land surface (or the top of casing if the casing is to be cut off below grade), the casing is to be filled with neat cement grout. If there is no water in the casing in this interval, the grout can simply be poured into the casing. Otherwise, the grout must be pumped through a tremie pipe that terminates within a few feet of the top of the pea gravel. If it is more economical to do so, any of the sections of the hole where gravel is recommended can be plugged using neat cement introduced through a tremie pipe.

7. Item #7 (Hanks Place Property):

a. Plug well full length using 34 bags of bentonite chips or 21 bags of neat cement.

8. Item #8 (Kofal Property): This is a Culturally Significant Site.

a. Plug well full length using 79 bags of coated bentonite pellets designed to fall through standing water or 43 bags of neat cement. The cement must be emplaced by a reverse tremie method or pumped.

b. Plug cistern according to Section 025251-A; Culturally Significant Cistern

Closure.

9. Item #9 (Roby Lake):

a. Plug well full length using 18 bags of bentonite chips or 11 bags of neat cement. This amount of grout will plug 60 feet.

10. Item #10 (Banta, Sunnen Property): This is a Culturally Significant Site.

a. Plug well full length with 46 bags of bentonite chips or 24 bags of neat cement.

b. Plug cistern according to Section 025251-A; Culturally Significant Cistern

Closure.

11. Item #11 (Dunlap Property):

a. Well #1; Plug full length using 11 bags of bentonite chips or 7 bags of neat cement.

b. Well #2; Plug full length using 7 bags of bentonite chips or 4 bags of neat cement.

12. Item #12 (Cedar Creek #1 – CR354):

a. Plug cistern by pushing in the upper few feet of well lining, and filling the well to within two feet of the surface with chlorinated clean fill such as coarse gravel or rock, varied-sized agricultural lime, or sand. The remainder of the well should be filled with clay or clay-rich soil. Soil should be mounded slightly at the top and compacted to help offset settling.(CIM-0900-4F-734-0905-01) Region Wide Water Solar

13. Item #13 (Cedar Creek #2, Middle River Site - Compartment 9):

a. Plug cistern by pushing in the upper few feet of well lining, and filling the well to within two feet of the surface with chlorinated clean fill such as course gravel or rock, varied-sized agricultural lime, or sand. The remainder of the well should be filled with clay or clay-rich soil. Soil should be mounded slightly at the top and compacted to help offset settling.

E. Dispose of all materials at a recycling center or a legal land fill.

F. A report of the method of plugging shall be filed with the division on a registration report form that is provided by the division. Registration form must be submitted within 60 days after plugging of each well.

G. Furnish well abandonment log, GPS location of abandonment and a digital picture of the abandoned well site to the Forest Service.

END OF SECTION 025251(CIM-0900-4F-734-0905-01)

SECTION 025251-A - CULTURALLY SIGNIFICANT CISTERN CLOSURE

PART 7 - GENERAL

7.1 SECTION REQUIREMENTS

A. Rock lining of cisterns, associated structures and adjoining structures shall not be disturbed.

B. Comply with MoDNR regulations and cistern closing regulations of authorities having jurisdiction.

C. Contractor shall notify COR 48 hours prior to work commencing.

D. Contractor shall perform work in the presence of a Forest Service archeologist.

E. Contractor shall make all efforts to limit ground and site disturbance during project work.

PART 8 - PRODUCTS

8.1 Fill

A. Sand and Fine Gravel

1. Particle size shall be 3/8” minus with all material passing the No. 50 sieve removed.

2. Shall be a nonplastic material free from organic and deleterious materials.

8.2 Concrete

A. Normal-Weight Concrete: Prepare design mixes, proportioned according to ACI 301, as follows:

1. Minimum Compressive Strength: 3000 psi at 28 days.

2. Maximum Water-Cementitious Materials Ratio: 0.50

3. Slump Limit: 4 inches plus or minus 1 inch.

4. Air Content: 5% plus or minus 1%.

8.3 Steel Reinforcement

A. Grade 60 deformed bar.

PART 9 - EXECUTION

9.1 Cistern Closure

A. Maintain services/systems indicated to remain and protect them against damage during selective closure operations. Before proceeding with closure notify COR to enable archeologist to be present during closure operations.

B. Contractor shall minimize rutting and soil disturbance to the minimum extent necessary to complete the work.

C. Provide temporary barricades and other protection required to prevent injury to people and damage to adjacent buildings and facilities to remain.

D. Provide and maintain shoring, bracing, and structural supports as required to preserve stability and prevent movement, settlement, or collapse of construction and finishes to remain or construction being demolished.

E. Chlorinate water in well/cistern in accordance with MoDNR regulations.

F. Place fill sand/gravel in a manner that does not damage structural integrity of cistern or adjacent structures at a rate that does not allow “bridging” of material, to a level that is at or above the surrounding soil level.

G. Construct a concrete cap 4” thick with #4 rebar spaced at 1 foot intervals both ways and centered vertically in the concrete cap. Adequate concrete cover of all rebar shall be maintained in all portions of the cap (1 ½” min. cover). Concrete cap shall cover the entire cistern/well structure and extend past the rock-lined walls a minimum of 4” in all directions.

H. Contractor shall level and smooth all ruts or soil disturbance caused by construction activities.

I. Contractor shall record filling activities, GPS location, and prepare closure report as required in other sections of this contract.

END OF SECTION 025251-A