RWR has done a lot of work in the Mill Valley area, including foundation repairs, retaining walls and drainage repairs. You may see our trucks and drilling equipment on East Blythedale, working their way up into the Mill Valley neighborhoods. The hilly Mill Valley area, at the foot of Mt Tamalpais gets a lot of rain and moisture, which can cause foundations to become unstable, and retaining walls to fail. It is important to correct these problems with well designed, well engineered plans, that are properly constructed. RWR specializes in this type of construction work in the Mill Valley area, and has great relationships with many engineers and architects working in this area. If you have a situation you’d like us to look at, please give us a call.

Here’s an example of foundation repair work we perform in the Mill Valley area. You can see this work requires skillful experienced foundation contractors and very competent crew. RWR brings you the expertise you need for your important project.

This estimate is based on structural drawings, architectural drawings and landscape drawings, and structural drawings provided by contractor. The scope of work is for a house addition foundation including some site walls and for a new guest house/garage foundation. The estimate includes demo of concrete, excavation and off haul, drilling, installing concrete piers, installing concrete grade beam, slabs and CMU walls. The price includes all labor and material to complete the work as per the itemized scope of work below. Prices broken out are for illustration purposes only and not self supporting.

Scope of Work

Main House

Mobilization and Layout
• Mobilize to jobsite with track drilling rigs, portable drilling rigs along with other necessary equipment to complete job (See notes below).
• Layout to be completed by General Contractor per plans and specifications
• Daily Cleanup
• Final Cleanup

Note: All soft demo and safe off of utilities to be completed by others prior to mobilization. Our estimate will demo the existing foundation as required. The estimate assumes the use of a track drilling rig for a number of the piers and portable drilling rigs where the track rig is unable to access. In addition it recommends replacement of existing wood retaining wall below work site. Landscape plans call for wall to be “renovated”. The wall has a number of rotted timbers. Will be performing excavation, drilling and installing new concrete above this wall and as such it is not responsible or liable if wall fails during construction.

Demo Concrete
• Demo slabs and foundation per plans and specifications to allow drilling and installation of new piers.
• Off haul debris from site

Piers
• Drill thirty eight (38) 18” diameter x 13 ft maximum pier holes as shown on plans and specifications S1.1M and S0.4M with track drilling rig where applicable and portable drilling rig where track cannot reach. See hard rock drilling conditions. Final depths to be determined by soils engineer.
• Install thirty eight (38) steel cages and place concrete in holes per plans and specifications S1.1M and S0.4M .
• Off haul pier spoils from site.

Concrete Grade Beams
• Excavate for new concrete grade beams per plans and specifications S1.1M, S0.4M and S0.5M.
• Off haul spoils from site
• Dowel and epoxy into existing footing with #4 dowels per plans and specifications. Price does not include installation of threaded rods into existing foundation.
• Install concrete reinforced grade beam per plans and specifications S1.1M, S0.4M and S0.5M. Include steps as indicated and where necessary.
• Note: Price does not include any embedments into concrete except for Foundation J bolts.
• As noted on plans and specifications 16/S0.4M install concrete slurry between new and existing walls.
Concrete Retaining Walls
• Install new 10 inch thick concrete reinforced retaining walls per plans and specifications S1.1M, 16/S0.4M, 4/S0.5M and 6/S0.4M.
• Include floating concrete grade beam at top of wall per plans and specifications.
• Walls are to be formed and are approximately 552 sq. ft.
• Note for detail 6/S0.4M structural plans indicate drainage and waterproofing per architectural. We have included Paraseal and Miradrain for these walls only.

Drainage
• Install on new 10 inch retaining wall in front (6/S0.4M) Miradrain and Paraseal per plans and specifications.
• Include approximately 63 linear ft of 4” SDR 35 pipe in a rock pocket at bottom of wall per plans and specifications 6/S0.4M. Note. Final exit by others.

Slab
• Install approximately 182 sq ft of new 7 inch thick concrete structural slab over 2 inches of sand, over 6 mil vapor barrier over 4” of gravel on compacted fill per plans and specifications S1.1M. Include #5 rebar@ 12” o.c. e.w. Trowel finish.

Alternative #1

Steel I Beam Wall

Note: This is an estimate for replacing the existing wood retaining wall along the side of the house just below the new work. Landscape plans call for wall to be renovated. There are no structural plans for new wall. We have provided an estimate for installing a new wood lag wall with steel I beams after demo has been completed but before we install the new foundation and concrete. Access to wall at this point will be the best time for installation to hold down costs.
Piers
• Drill nine (9) 18” diameter x 10 ft maximum pier holes. See hard rock drilling conditions. Final depths to be determined by soils engineer.
• Install nine (9) steel I beams w8x18 and place concrete in holes.
Wood Lagging
• Install 3×12 PT Douglass Fir #1 wood lagging between I beams. Gap beams ¼” for drainage.
• Wall is approximately 46 ft in length.
• Backfill behind wall ¾ drain rock and cap with native soils.
Alternative #2

Landscape CMU Wall at Pool (L1.0)

Demo Concrete
• Demo brick and existing stone wall to allow for installation of new retaining wall. Remaining brick and stone demo to be completed by others.
• Off haul debris from site
Piers
• Drill ten (10) 24” diameter x 10 ft maximum pier holes as shown on plans and specifications with portable drilling rig. See hard rock drilling conditions. Final depths to be determined by soils engineer.
• Install ten (10) steel cages and place concrete in holes per plans and specifications.
• Off haul pier spoils from site.

Concrete Footing
• Excavate for new concrete footing pier cap per plans and specifications a maximum of 6.6 ft wide x 1.5 ft deep x.
• Off haul spoils from site
• Install new concrete reinforced footing pier cap for new CMU wall 6.5 ft wide x 1.5 ft deep with rebar extending for CMU walls a minimum of every 8 inches per plans and specifications.

CMU
• Install CMU as follows per plans and specifications
o 16 inch standard CMU for first 2 ft.
o 12 inch standard CMU for the next 2 ft.
o 8 inch standard CMU for the following 4.5 ft
• Wall height maximum is 8.5 ft from top of footing.
• Install 1 ft wide drain rock wrapped in filter rock behind wall capped with 1 ft of native soil.
• Install a perforated 4 inch SDR 35 pipe at bottom of wall per plans and specifications (final exit of pipe by others).
• Install 1 ft wide drain rock wrapped in filter rock behind wall capped with 1 ft of native soil.
• Note: Excludes trench drain in front of wall, new stone facing and cap along with replacement of paving.
Alternative #3

Landscape Wood Retaining Wall (L1.0)

Piers
• Drill fifteen (15) 18” diameter x 10 ft maximum pier holes per plans and specifications. See hard rock drilling conditions. Final depths to be determined by soils engineer.
• Install nine (15) steel I beams w8x31 and place concrete in holes.

Wood Lagging
• Install 4×12 PT Douglass Fir #1 wood lagging between I beams.
• Install on backside of 4×12 lagging 2×6 PT continuous per plans and specifications.
• Wall is approximately 73 ft in length x 4 ft high maximum.
• Install 4” SDR 35 perforated pipe at bottom of crushed gravel. Final exit by others.
• Backfill behind wall ¾ drain rock and cap with native soils
Guest House & Garage

Mobilization and Layout
• Mobilize to jobsite with track drilling rigs, portable and other necessary equipment to complete job (See notes below).
• Layout to be completed by General Contractor per plans and specifications
• Daily Cleanup
• Final Cleanup

Site Excavation
• Grub site of vegetation and off haul debris
• Excavate and establish building site per plans and specifications A/G1.
• Price does not include off haul or import of material.

Piers
• Drill thirty two (32) 18” diameter x 13 ft maximum pier holes as shown on plans and specifications S1.1G and S0.4G with track drilling rig. See hard rock drilling conditions. Final depths to be determined by soils engineer.
• Install thirty two (32) steel cages and place concrete in holes per plans and specifications S1.1G and S0.4G.
• Off haul pier spoils from site.

Concrete Grade Beams
• Excavate for new concrete grade beams per plans and specifications S1.1G and S0.4G.
• No off haul spoils.
• Install concrete reinforced grade beam per plans and specifications S1.1G and S0.4G.
• Include steps as indicated and where necessary.
• Note: Price does not include any embedments into concrete except for Foundation J bolts.
Concrete Retaining Walls
• Install new 8 inch thick concrete reinforced retaining walls per plans and specifications S1.1GM and 6/S0.4G.

Slab
• Install approximately 490 sq ft of new 7 inch thick concrete structural slab over 4 inches of gravel with #5 rebar @ 12” o.c. top and bottom e.w. Trowel finish.
Alternative #4

Demo Existing Barn
• Demo existing barn on lot to clear pad for installation of guesthouse.
• Off haul debris from site
• Utility safe off by others
• Qualifications and Clarifications
• Job is bid as package.
• Includes one mobilization only.
• Prices are subject to adequate supply of wood, steel, rock, concrete, and asphalt, PVC resins, PVC pipe, fittings at prices quoted at bid time and are good for 30 days.
• Proposal is based on working std 40 hours per week, 5 work days and mutually agreeable schedules.
• Survey of property lines must be done by licensed surveyor.
• Progress payments every two weeks.
• General Contractor to provide elevations and confirm layout

Exclusions
• Cost of plans, permits, bonds, testing and inspections.
• Any additional work due to utilities including buried pipes or irrigation pipes unless noted.
• Increased costs of excavation or drilling due to hard rock, caving or underground water. (Hard rock excavation is defined as material that requires the use of pneumatically or hydraulically operated hammers or rams to excavate.) (Hard rock drilling is defined as a penetration rate slower than 1 ft. in 5 minutes).
• Replacement of damaged landscaping, driveway or fence.
• Excavation or demo and off hauling of hazardous materials, underground tanks, or materials unacceptable at dumps.
• Any work related to landscaping, fences or gates except as outlined
• Structural or Earth shoring
• Embedment into concrete other than standard foundation bolts
• Survey of property lines
• Landscaping or irrigation
• Excludes electrical and plumbing including UFER.
• Carpentry except as needed for installation of concrete or shoring
• Demo of concrete in excess of 8 inches.
• Exclude stone on slabs and stone veneer on CMU walls.

RWR has done a lot of work in the Mill Valley area, including foundation repairs, retaining walls and drainage repairs. You may see our trucks and drilling equipment on East Blythedale, working their way up into the Mill Valley neighborhoods. The hilly Mill Valley area, at the foot of Mt Tamalpais gets a lot of rain and moisture, which can cause foundations to become unstable, and retaining walls to fail. It is important to correct these problems with well designed, well engineered plans, that are properly constructed. RWR specializes in this type of construction work in the Mill Valley area, and has great relationships with many engineers and architects working in this area. If you have a situation you’d like us to look at, please give us a call.

Here’s an example of foundation repair work we perform in the Mill Valley area. You can see this work requires skillful experienced foundation contractors and very competent crew. RWR brings you the expertise you need for your important project.

This estimate is based on drawings. The scope of work is for demolition of the existing parking deck and house decks as identified in plans, drilling and installing concrete reinforced piers, excavation and compaction, grade beams, concrete retaining walls, a new parking deck including concrete pad on parking structure and some new driveway slab. The price includes all labor and material to complete the work as per the itemized Scope of Work below.

Scope of Work
Mobilization and Layout
• Mobilize to jobsite with track drilling equipment, excavation and other necessary equipment to complete job (See notes below).
• Layout job site per plans and specifications
• Daily Cleanup
• Final Cleanup

Demo & Excavation

Demo
• Demo existing parking deck and off haul debris from site per plans and specifications S1 and S2.
• Demo existing deck around house and off haul debris from site per plans and specifications S1 and S2.
• Demo part of driveway slab and off haul debris from site.
Excavation & Compaction
• Excavate for new storage area per plans and specifications approximately 24 ft x 10 ft x 13 ft on a triangle to achieve a level area before the parking deck.
• Reinstall and compact driveway per plans and specifications (Compaction must be approved by others).
• Note: See notes regarding off haul.

Installation

Piers (For all locations)
• Drill nine (9) 18” diameter holes x a maximum depth of 10 ft per plans and specifications S2, S3 and S4. An allowance of 326 feet has been provided for 18” diameter piers. Final depths to be determined by engineer. See hard rock drilling conditions.
• Install nine (9) 18” diameter concrete reinforced piers x maximum depth of 10 ft per plans and specifications S2, S3 and S4. No Deduct
• Drill seven (7) 12” diameter holes x a maximum depth of 10 ft per plans and specifications S2, S3 and S4. Final depths to be determined by engineer. See hard rock drilling conditions.
• Install seven (7) 12” diameter concrete reinforced piers x 10 ft per plans and specifications S2, S3 and S4. No deduct.
• Install and form sonotube above grade as necessary at 12 inch piers a maximum of 4 ft per pier. Pour concrete above grade per plans and specifications S4. Additional cost if height is greater than 4 ft.
• Include seven (7) galvanized base CB66 brackets per plans and specifications.
• Use pier spoils as backfill at site

Grade Beams and Tie Beams
• Excavate for grade beams and tie beams for retaining walls, parking structure and deck piers per plans and specifications S2, S3 and S4.
• Spoils to be retained at site
• Install approximately 98 linear ft of concrete reinforced grade beams 1.0 x 1.5 and 10” x 10” per plans and specifications S2, S3 and S4.
• Drill and install approximately 48 epoxy dowels into existing foundation per plans and specifications.
Concrete Retaining Walls
• Install approximately 371 sq ft of 12 inch thick concrete reinforced retaining walls ranging from a minimum of 3 ft tall to a maximum of 10 ft tall per plans and specifications S2, S3 and S4. Wall is turned at East side capturing and retaining soil as required. Price assumes stepped grade beam on remaining East side stepped with grade.
• On garage side of parking structure install a 6 inch wide concrete retaining wall a maximum of 6 ft high following the existing foundation of garage. Note: This is an unknown condition. Price excludes any shoring or underpinning of existing foundation if required.
• Walls are to be formed or shotcrete.
• If walls are Shotcrete walls then walls will be finished with sponge finish.

Drainage
• Install 75 linear ft consisting of a rock pocket 8” x 12” wrapped in a burrito of filter fabric with a 4” SDR 35 perforated drain pipe per plans and specifications S2, S3 and S4.
• Install approximately 40 linear ft of tight SDR 35 pipe with cleanouts as necessary to exit perforated drain pipe down hill per plans and specifications S2, S3 and S4.
• Terminate perforated pipe into tight pipe and exit downhill. Note plans do not show final exit and price is subject to adjustment if additional final exit requirements are made by engineer.
• Install approximately 371 sq. ft of Miradrain on backside of walls per plans and specifications S2, S3 and S4.
• Install approximately 371 sq. ft of Paraseal on backside of walls per plans and specifications S2, S3 and S4.
• Note: Plans do not show any waterproofing on side of parking structure. Estimate assumes waterproofing will be required and is included.

Carport Structural
• Install the following for the carport deck per plans and specifications S2 and S3 as follows:
o Approximately Twenty three (23) 2-11/16 x 11-7/8 PSL Joists every 12”. (Note plans call for every 24” however this is modified to every 12” as noted).
o Approximately 159 linear ft of Microllam edge blocking
o New 1-1/8 inch TGPT Plywood for car deck
o New 2×6 inch framed wall
o New 3×4 PT sill
o New ½” plywood sheathing on exterior
• Install approximately 300 sq. ft of MiraDRI 860 membrane for waterproofing of parking deck following manufacturers recommendations.
• Note: Exclude any windows, doors or exterior finish (stucco or siding). Exclude paint.
• Price excludes railing

Carport Structure Slab
• Install approximately 300 sq. ft. of 3.5 inch new concrete reinforced pad on the 1-1/8 inch plywood deck and approximately 275 sq. ft of 4 inch concrete reinforced slab on grade over 4 inches of drain rock. Steel trowel finish.
• Include approximately 44 linear ft of 6 inch wide curb on perimeter of carport structure per plans and specifications S3.
• Note: It is strongly recommended that the carport slab includes Xypex concrete additive. This is a waterproofing additive which is added to concrete at the batch plant.

The following are alternatives for further consideration:

Alternative #1

Price excludes off haul of spoils.
Alternative #2

• Install small wood lag landscape retaining wall in back for retention of spoils. Location to be approved by owner.
• Wall is to be a maximum of 2.5 ft high from grade and a maximum of 45 linear ft.
• Wall is constructed of a maximum of nine (9) 4×6 PT Posts to a maximum of 5 ft deep in concrete
• Wood lag is 3×4 PT
• No drainage
• Does not guarantee this will be sufficient for retaining all spoils excavated. If additional spoils need to be removed cost is per yard as quoted in Alternative #1.
Alternative #3

• Below carport structure on the interior of the new storage area install a new 4 inch concrete reinforced slab on grade over 2 inches of sand over a 6 mil vapor barrier and 4 inches of drain rock.
• Slab is to include #4 rebar @ 12 inches o.c.
• Steel troweled finish
Qualifications and Clarifications
• Job is bid as package unless agreement to otherwise
• Includes one mobilization only
• Prices are subject to adequate supply of wood, steel, rock, concrete, asphalt, PVC resins, PVC pipe, fittings at prices quoted at bid time and are good for 30 days.
• Proposal is based on working std 40 hours per week, 5 work days and mutually agreeable schedules.
• Work to be completed as outlined above. No additional items without change order.
• Survey of property lines must be done by licensed surveyor.
• Price excludes shoring or underpinning. If shoring or underpinning is required then work will be performed on a Time and Material basis unless a Change Order is executed for the additional work.
• New deck to be installed by others
• All excavation cuts greater than 5 ft require the contractor to possess a CalOSHA shoring/excavation license. Fully licensed to accomplish such excavations.
• Progress payments every two weeks.

Exclusions
• Cost of plans, permits, bonds, testing and inspections.
• Increased cost of drilling or excavation due to hard rock, underground water or caving soils. (Hard rock drilling is defined as a penetration rate slower than 1 ft. in 5 minutes.) (Hard rock excavation is defined as material that cannot be excavated with a conventional backhoe or excavator bucket.)
• Any work on utilities including buried pipes or irrigation pipes.
• Replacement of damaged landscaping, driveway or fence.
• Excavation and off hauling of hazardous materials, underground tanks, or materials unacceptable at dumps.
• Any work related to landscaping, fences, railing or gates except as outlined
• Additional drainage not specifically outlined in this proposal.
• Earth or Structural shoring including underpinning of house (to be completed on a Time and Material basis if required).
• Winterization erosion control items (to be completed on a Time and Material basis if required)
• Electrical or Plumbing except as outlined in this proposal
• New Deck
• Backfill or Compaction of any soils not outlined in this proposal.
• Importation of backfill material except as noted.
• Survey of property lines
• Landscaping or irrigation

RWR has done a lot of work in the Mill Valley area, including foundation repairs, retaining walls and drainage repairs. You may see our trucks and drilling equipment on East Blythedale, working their way up into the Mill Valley neighborhoods. The hilly Mill Valley area, at the foot of Mt Tamalpais gets a lot of rain and moisture, which can cause foundations to become unstable, and retaining walls to fail. It is important to correct these problems with well designed, well engineered plans, that are properly constructed. RWR specializes in this type of construction work in the Mill Valley area, and has great relationships with many engineers and architects working in this area. If you have a situation you’d like us to look at, please give us a call.

Here’s an example of foundation repair work we perform in the Mill Valley area. You can see this work requires skillful experienced foundation contractors and very competent crew. RWR brings you the expertise you need for your important project.

This estimate based on plans, drainage plans and structural drawings. The bid is for the installation of a new reinforced concrete retaining wall as described below.

This price includes labor and materials to complete job as per the itemized scope of work listed below.

Scope of Work
Structural Sheet S1
• Mobilize to jobsite. Demobilize.
• Supervision.
• Perform weekly cleanup.
New Concrete Foundation Installation
• Excavate for and install new reinforced concrete foundation footings, grade beams; stem walls and garage structural slab as per structural details and layout on page S1. Includes exterior patios and concrete stairs. Rat proofing is not included in this price.
• Clean up site and remove RWR related construction debris.
Pier Installation Option #1 (14 ft. deep Piers)
• Drill and install (69) 16” diameter x a maximum of 14 ft. deep reinforced concrete piers, (60) as per structural detail 1/SD3 and (9) as per structural detail 3/SD3. Remove drilling spoils from site. (See attached casing installation and removal cost).
Additional cost for Metal casing Installation to Option #1 (14 ft. deep Piers).
• The installation of the reinforced concrete piers may require the installation of metal casing as per verbal conversations with Pete Sequeira and the descriptions of the findings based on the soils report by Salem-Howes Associates Geotechnical Consultants. Casing installation and removal price is estimated . (To be added to the drilling price provided). Price based on full lengths of casing recuperated and re-used.
Pier Installation Option #2 (18 ft. deep Piers)
• Drill and install (69) 16” diameter x a maximum of 18 ft. deep reinforced concrete piers, (60) as per structural detail 1/SD3 and (9) as per structural detail 3/SD3. Remove drilling spoils from site. (See attached casing installation and removal cost).

Additional cost for Metal casing Installation to Option #2 (18 ft. deep Piers).
• The installation of the reinforced concrete piers may require the installation of metal casing and the descriptions of the findings based on the soils. Casing installation and removal price is estimated. (To be added to the drilling price provided). Price based on full lengths of casing recuperated and re-used.

Drainage plan C1.0
• Excavate and install (1) trench drain as per plans.
• Excavate for and install a new SDR 35 tite line for new roof drains (RD) and downspouts (DS) as per sheet C1.0 layout. Outlet as per plans.
• Excavate for and install new SDR 35 perforated foundation drain lines along the outside perimeters of the new house foundation as per C1.0. Foundation drainage lines consist of a new SDR 35 perforated line surrounded in ¾ crushed rock wrapped in filter fabric pocket approximately 1 ft. deep x 1 ft. thick approx located along the bottom of the new perimeter concrete footings (estimated at 18” maximum depth from existing grades). Waterproofing or drainage board installation is not included in this price.
• Excavate for and install for new 4” and 6” diameter storm drain lines and connect to one of the new outlet locations as per plans.
• Excavate for and install (9) different types of DI’s and AD’s as per sheet C1.0 layout, including all SDR 35 4”and 6” diameter perforated and tite lines.
Un-reinforced Rat Proofing
• Install approx. 2400 square ft of 2” thick un-reinforced concrete rat proofing at all new crawl space areas of the new house as shown on C1.0.

Notes
• Access to property was not possible. A site visit is necessary prior to confirm bid inclusions and exclusions due to unknown site conditions. Estimate is based on plans and normal conditions.
• Metal casing is priced based as rental price and all casing is assumed to be 100% recuperated.
• Elevations and layout to be provided by General Contractor performing the remainder of the project.
• Structural Shoring must be installed to a minimum of 1.5 ft. below the new slabs and footings sub-grades prior to RWR commencing the job. (See Alternate price for both items presented above).
• All soft and hard demolition must be performed prior to RWR starting the excavation task.
Optional Installation of Helical Piers
• Upon approval of soils engineer and structural engineer install sixty nine (69) 2-7/8 x a maximum of 20 ft. deep vertical helical piers with a 12” x 12” helix head in10 ft extensions. See Notes below.
• Helix is to be driven into the ground using track equipment to a torque of 10,000 maximum. Final Depth to be determined by soils engineer.
• Includes standard new construction helical head.
• Additional cost per ft for helical piers
• Helical Piers are 2 7/8” (o.d.) galvanized pipe material
Qualifications and Clarifications
• In full compliance with Cal-OSHA rules, annual permits and regulations for the performance of this job.
• Job is bid as package unless agreement to otherwise.
• Includes one mobilization only.
• Prices are subject to adequate supply of rock, concrete, asphalt, PVC resins, PVC pipe, fittings at prices quoted at bid time and are good for 30 days.
• Proposal is based on working std 40 hours per week, 5 work days and mutually agreeable schedules.

Exclusions
• Cost of plans, permits, bonds, inspections and testing.
• Any work on utilities including buried pipes.
• Increased cost of drilling or excavation due to hard rock, tree roots, underground water or caving soils. (Hard rock drilling is defined as a penetration rate slower than 1 ft. in 5 minutes.) (Hard rock excavation is defined as material that cannot be excavated with a conventional backhoe or excavator bucket).
• Hard/soft demolition.
• Metal I-beams/metal work or any related not mentioned above.
• Provide or install of shrink/leveling grout.
• Any drainage work not mentioned above.
• Asphalt Flat work/sub base preparation or any other than mentioned above.
• Concrete retaining walls or any additional concrete work not shown or related to house foundation.
• Repair to landscaping or irrigation.
• Cost of surveying if needed.
• Excavation of hazardous materials, underground tanks, or materials unacceptable at dumps.

RWR has done a lot of work in the Mill Valley area, including foundation repairs, retaining walls and drainage repairs. You may see our trucks and drilling equipment on East Blythedale, working their way up into the Mill Valley neighborhoods. The hilly Mill Valley area, at the foot of Mt Tamalpais gets a lot of rain and moisture, which can cause foundations to become unstable, and retaining walls to fail. It is important to correct these problems with well designed, well engineered plans, that are properly constructed. RWR specializes in this type of construction work in the Mill Valley area, and has great relationships with many engineers and architects working in this area. If you have a situation you’d like us to look at, please give us a call.

Here’s an example of foundation repair work we perform in the Mill Valley area. You can see this work requires skillful experienced foundation contractors and very competent crew. RWR brings you the expertise you need for your important project.

This is an estimate based on plans. The scope of work includes drilling, concrete piers, CMU wall and drainage. The price includes all labor and material to complete the work as per the itemized scope of work below.

Scope of Work

Mobilization and Layout
• Mobilize to jobsite with drilling rigs along with other necessary equipment to complete job (See notes below).
• Layout to be completed by General Contractor per plans and specifications.
• Daily Cleanup
• Final Cleanup
Piers
• Drill seven (7) 18” diameter x 9 ft maximum depth pier holes using portable drilling equipment. See drilling conditions and exclusions. Final depths to be determined by soils engineer. Pier spoils to remain on site for others.

Grade Beam
• Excavate for grade beam approximately 60 ft in length x 22 in wide x 12 in high
• All spoils to remain on site for others
• Install concrete reinforced grade beam 60 ft in length x 22 in wide x 12 in high.
• Grade beam and piers to be poured concurrently.

CMU Wall
• Install 8 inch wide CMU wall a maximum of 5 ft high using typical masonry block wall construction. Price assumes close end CMU 8 inch standard blocks.
• At each pier location form up a 16 inch pilaster per plans and specifications
• Fill pilaster and cells of CMU wall with grout per plans and specifications

Drainage
• Install a 4” SDR 35 perforated pipe behind wall with Class 2 permeable or drain rock wrapped in filter fabric approximately 1 ft back from wall. Final exit of drain pipe to be completed by others.
Alternative #1
• In lieu of price above delete drilling costs and substitute drilling cost on an hourly basis.
Qualifications and Clarifications
• Job is bid as package.
• Includes one mobilization only.
• Prices are subject to RWR obtaining adequate supply of wood, steel, rock, concrete, and asphalt, PVC resins, PVC pipe, fittings at prices quoted at bid time and are good for 30 days.
• Proposal is based on working std 40 hours per week, 5 work days and mutually agreeable schedules.
• Survey of property lines must be done by licensed surveyor.
• Deposit with progress payments every two weeks. No retention.

Exclusions
• Cost of plans, permits, bonds, testing and inspections.
• Any additional work due to utilities including buried pipes or irrigation pipes unless noted.
• Increased costs of excavation or drilling due to hard rock, caving or underground water. (Hard rock excavation is defined as material that requires the use of pneumatically or hydraulically operated hammers or rams to excavate.) (Hard rock drilling is defined as a penetration rate slower than 1 ft. in 5 minutes).
• Additional cost as a result of unknown obstructions
• Replacement of damaged landscaping, driveway or fence.
• Excavation and off hauling of hazardous materials, underground tanks, or materials unacceptable at dumps.
• Any work related to landscaping, fences or gates except as outlined
• Survey of property lines
• Landscaping or irrigation
• Excludes electrical and plumbing
• Shoring
• Upper landscape wall
• Removal of existing temporary wall
• Any additional drainage
• Stone cap or stone veneer
• Railing
• Off haul of pier or excavation spoils

RWR has done a lot of work in the Mill Valley area, including foundation repairs, retaining walls and drainage repairs. You may see our trucks and drilling equipment on East Blythedale, working their way up into the Mill Valley neighborhoods. The hilly Mill Valley area, at the foot of Mt Tamalpais gets a lot of rain and moisture, which can cause foundations to become unstable, and retaining walls to fail. It is important to correct these problems with well designed, well engineered plans, that are properly constructed. RWR specializes in this type of construction work in the Mill Valley area, and has great relationships with many engineers and architects working in this area. If you have a situation you’d like us to look at, please give us a call.

Here’s an example of foundation repair work we perform in the Mill Valley area. You can see this work requires skillful experienced foundation contractors and very competent crew. RWR brings you the expertise you need for your important project.

This estimate is based on structural drawings. This bid is for the excavation and installation of new house reinforced concrete foundation on piers per S2.1.

Our price includes all labor and material to complete the work as per the itemized Scope of Work below.

Scope of Work
New House Foundation
Excavation
• Grub and clear work area for the installation of the new house foundation.
• Excavate for the installation of the new house foundation as per plans. Off-haul excavated spoils from site.

Mobilization and Supervision
• Mobilize to jobsite. Demobilize.
• Supervision.
• Perform weekly cleanup.

New Concrete Foundation Installation per S2.1
• For the new house foundation, install new perimeter and interior stem walls, perimeter grade beams and footings as per structural details and layout on sheet S2.1.
• Install house and garage new 6” thick reinforced concrete slabs over 10 mil vapor barrier and 4” of ¾” crushed gravel. Includes Miradrain 6000 drainage mat under new house slabs + 12”x12” collector drainage pocket as per plans.
• Clean up debris and form materials from site.

Drill and Install Piers
• Drill and install (38) 18” diameter x 8 ft. deep, (8) 18” diameter x 12 ft. deep + (2) 18” diameter x 16 ft. deep maximum reinforced concrete piers as per layout on sheet S2.1. Remove drilling spoils from site.

Notes
• Elevations and layout to be provided by General Contractor or surveyor (hired by others) performing the remainder of the project.
Qualifications and Clarifications
• Job is bid as package unless agreement to otherwise
• Includes one mobilization only.
• Prices are subject to adequate supply of rock, concrete, asphalt, PVC resins, PVC pipe, fittings at prices quoted at bid time and are good for 30 days.
• Proposal is based on working std 40 hours per week, 5 work days and mutually agreeable schedules.
• Progress payments every two weeks.
• Itemized prices are for reference purposes only and are not self supporting.

Exclusions
• Cost of plans, permits, bonds, testing and inspections.
• Increased costs of excavation or drilling due to hard rock, caving or underground water. (Hard rock excavation is defined as material that requires the use of pneumatically or hydraulically operated hammers or rams to excavate). (Hard rock drilling is defined as a penetration rate slower than 1 ft. in 5 minutes).
• Additional cost due to utility obstructions including any additional work on utilities or buried pipes.
• Driveway, walkways, and other concrete work not shown on S2.1.
• Drainage or waterproofing work other than drainage under the new house structural slab shown on S2.1.
• Grading, erosion control, hydro-seeding or any additional work not related to the installation of the new house foundation per S2.1.
• Landscaping work or any additional retaining walls, walkways, patios, tie steps or other concrete work not mentioned in our scope of work.
• Re-grading of existing soils or re-compaction of the same (if required additional cost will apply) for the installation of new foundations or structural up-grades.
• Excavation of hazardous materials, underground tanks, or materials unacceptable at dumps.
• Architectural concrete or type of special concrete finish product.
• Surveying and Layout.
• Supply of embedments other than foundation bolts.