Tag Archives: dredge cost

Post Dredge Comparison Map

The Mapping Network completed a post dredge bathymetry survey to show the status of a multiple cove dredging project on a lake near Kansas City.   The comparison map was calculated to verify the amount and location of material removed.   Areas still needing to be dredged are located and the dredging contractor will focus their efforts on those locations.  This verifies the dredging has reached the planned depths.
Dredge-Post-Dredge

About The Mapping Network: 

The Mapping Network is an industry leader in Geographic Information Systems, GPS Data Collection, Aerial Imagery, and Data Conversion.  We specialize in terrain and sub-surface (bathymetry) GPS mapping, topographic mapping, and aerial imagery.  Give us a call or send an e-mail to find out more details.

phone:  (402) 241-8177

e-mail: info@themappingnetwork.com

website: www.themappingnetwork.com

Check out The Mapping Network on Twitter or Facebook for more examples and success stories!

 

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Bathymetry and Sediment Survey of a Lake

The Mapping Network and their nationwide group of partners receive many calls each week about sediment issues on lakes.  More often than not, these callers have a fairly good idea about the state of their lake from simply looking at if from the shore on while on the boat.  However, trying to quantify the severity of sedimentation and planning for a potential dredging project is much more difficult.  This is where our experienced teams come into play.  We have the tools, knowledge and experience to accurately survey the current lake depths along with mapping the sediment thickness in the lake.

Below is an example of a lake that had sediment accumulating in the usual spots (inflows) however there were a couple other problem areas where new homes had recently been built.  The HOA used this map to plan for dredging in the main inflow of the lake and also created a bulletin to property owners about the importance of controlling erosion into the lake – eventually this will lead to more dredging in the future.

A lake surveyed by The Mapping Network included creating a contour and 3D shaded depth map of the current lake depths.  Also a sediment thickness map of the entire lake was generated.

A lake surveyed by The Mapping Network included creating a contour and 3D shaded depth map of the current lake depths. Also a sediment thickness map of the entire lake was generated.  The client was able to visualize where dredging will take place and also quantify the amount of material needing to be removed.

The Mapping Network is instrumental in bringing GPS lake mapping technology to the recreational market.  Their experience wit the most efficient GPS and sonar technology allows their partners, like us, to offer these unique services to our clients.  Pond Medics utilizes this lake mapping technology to reveal this unseen, underwater world.  Combining sub-foot accurate equipment and depth accuracies of up to 1/10th of a foot, we can produce a picture of what few people will ever see – the bottom of your lake.

For more information on Pond Medics, Inc. please contact:

Trent Lewis

phone: (972) 334-0104

e-mail:  info@pondmedics.com

website:  www.pondmedics.com

About The Mapping Network: 

The Mapping Network is an industry leader in Geographic Information Systems Consulting, Data Conversion, and GPS Data Collection.  We specialize in terrain and sub-surface (bathymetry) GPS mapping, and recreational Real Estate listings.   The Mapping Network is proud to announce their firm has been chosen by Cabela’s, the World’s Foremost Outfitter, as a Landowner Services provider for Cabela’s Trophy Properties throughout the United States.  Visit us on the Cabela’s Trophy Properties website >> click here   Give us a call or send an e-mail to find out more details.

phone:  (402) 241-8177

e-mail: info@themappingnetwork.com

website: www.themappingnetwork.com

Check out The Mapping Network on Facebook for more examples and success stories!

How much does Dredging cost?

How much does dredging cost is the most commonly asked question for many lake associations.  We sat down with Dan McDougal, President of Dredge America and asked him that question.  

When lake homeowner’s call for our assistance with their potential upcoming dredging projects, the first question we usually get asked is, “How much does it cost?” This is usually followed by, “Just a ballpark figure that I won’t hold you to.” Then we often hear, “We have a board meeting tonight and I wanted to report on dredging to get the project moving.”

There are hundreds of variables that determine the cost of restoring a lake. There are three questions that need to be answered to begin the process of getting a ballpark feasibility price:

  1. How much material is there to dredge?
  2. Where can you put the material that is coming out of the lake?
  3. What is the nature of the material to be dredged?

In order to determine a quantity, the first thing that is required is to perform a pre-dredge hydrographic survey (bathymetry).  This type of survey will provide water depth information throughout the entire body of water.  At the same time a sediment survey can be performed providing soft sediment thickness information.

It is money well spent at this stage to hire an experienced hydrographic surveyor with proper insurance and credentials.  This will help protect the association if there is ever a dispute.  The hyrdrographer will be able to give a general description for the soil characteristics and perform the sub-bottom profiling all in one site visit. With this information, you can make an informed decision about how much more data is needed in order to get the most cost effective proposal for your dredging project.

After you have quantified how much sediment needs to be removed, the next step is to find a place to put it. Most people underestimate the amount of space they need to place and contain the sediment that comes out of the lake.  The size of area you will need will depend on many factors with the number one being the lay of the land. Usually for every two acres of lake that you dredge, an average of three foot of sediment, you will need an acre of upland area to place the material. This will yield an average elevation increase of six feet on land prior to consolidation.  The closer this area to the lake, the cheaper the dredging costs will be with all other things being equal. 

The final question to answer is the material characteristics. In most lakes, what is being dredged is often referred to as “muck.” This is generally a combination of silt, clay, and organics. There is also sometimes sand in the very end of the coves. The dredger needs to know this as sand is more costly to pump further, but easier to dewater; while muck pumps easy, but can be costly to dewater, particularly if the disposal area size is limited. Hard packed sand, or hard pan clay bottom, are more difficult to cut, and therefore more expensive. Rock is even more expensive and most often cost prohibitive. There should be a clear distinction if the dredger is expected to only remove sediment that has filled the lake since it was originally constructed, verses cut virgin ground that has never been excavated.

It is best to work with someone with many years of dredging experience to help guide you through the maze and advise you on what is needed, not needed, and what options you can elect for the associated costs. In the end, you want someone you can trust with a long history and who can supply you with pages of references. The very last thing you want is someone to learn about dredging on your project and on your dime.

So is your project feasible? If you can’t afford to have someone qualified come out and perform a hydrographic survey, the answer is no. If you can do this, then you can have a quantity and a three dimensional image of your lake bottom.  With this critical information you can communicate with your neighbors on what the problem is, where it is, and a ballpark of what it might cost to fix it.

One final thing to consider is that all lake associations have more mud than money. With the hydrographic survey, you can set your priorities based on a realistic budget that your association is willing to spend. You and all of your neighbors live on a lake for a reason. It is a lifestyle. Your lake has to be maintained just like your roads and your sewers. To ignore it, is to ignore the largest asset in your community. Property values go down or up based on the quality of the lake.

If you have anymore questions for Dan McDougal, feel free to email

or call him 800.464.5597.  You can also visit their website for more information.

The Mapping Network surveyed the bottom of the lake including the sediment depths. This map shows the lake water depth as blue contours lines as well as a color shaded sediment thickness. This specialized technology allows the POA to easily locate problem areas.
The Mapping Network surveyed the bottom of the lake including the sediment depths. This map shows the lake water depth as blue contours lines as well as a color shaded sediment thickness. This specialized technology allows the POA to easily locate problem areas.

The Mapping Network surveyed the bottom of the lake including the sediment depths. This map shows the lake water depth as blue contours lines as well as a color shaded sediment thickness. This specialized technology allows the POA to easily locate problem areas.

The Mapping Network is an industry leader in Hydrographic Surveys, Bathymetry, Geographic Information Systems Consulting, Data Conversion, and GPS Data Collection.  We specialize in terrain and sub-surface (bathymetry) GPS mapping.   If you are serious about maintaining  a high-quality golf course, lake or pond, be sure you have the ability to make the best decisions,  get your resource mapped by the professionals at The Mapping Network.   Give us a call or send an e-mail to find out more details.

phone:  (402) 241-8177

e-mail: info@themappingnetwork.com

website: www.themappingnetwork.com

Check out The Mapping Network on Facebook for more examples and success stories!

Property Owner Association Uses Hydrographic & Sediment Surveys to Create Strategic Sediment Removal Plan – Resulting in Hundreds of Thousands in Savings

The Mapping Network Hydrographic Survey Team exceeds expectations for Property Owner Association.

Overview:  A lake property association (POA) has been dealing directly with the challenges associated with sedimentation in their lakes for over 20 years.  In 2002 The Board of Directors created a 30 year sediment removal and management plan (2002-2031).  They looked at 3 different options: A) hiring a dredging professional, B) leasing dredging equipment and use current POA staff to operate, or C) purchasing a new dredge and using POA staff to operate.  They contacted two environmental consultants for cost estimates over the 30 year process.  The estimates ranged from $1,000,000 to $5,000,000 which left the POA in a difficult position of trying to make a long term management decision based on wide ranging potential costs.  In the end the POA decided to purchase their own dredging equipment an utilize existing staff and volunteers to operated the equipment.

In House Accountability Challenges:  After nearly a decade of in house dredging the POA Board of Directors was unable to quantify and verify results.  When reviewing the budget requests from the lakes and dam committee, they realized they were spending a lot of resources without having clear information on how successful the sediment removal process had been over the years.

New Vision:  The POA decided they needed to quantify the sediment problem to create a sustainable sediment management plan.  The president of the board spearheaded an effort to get a hydrographic and sediment survey completed.  The president contacted several hydrographic survey companies and chose The Mapping Network to provide this service based on experience in the industry and listening to the needs of the POA.

Lake Survey Purpose:  The primary objective of the hydrographic and sediment survey was to better understand the condition of the lake by charting the existing lake contours along with mapping the sediment thickness throughout the lake.  Once the mapping process was completed the POA was able to identify areas that needed dredging and how much material was there.  This allows for much better budgeting and accountability.

Results: The POA was excited to have information based on real numbers (lake and sediment survey).  The hydrographic survey results are an essential part of the decision making process with regards to the sediment removal planning.  After 20 years of dredging and several studies performed by consultants they felt for the first time they finally understood the problem and how to manage it.  Now they have real information, which gives them a clear picture of what to do in the future.

Future: Members of the POA say they will completely change course by finishing up the current in house dredging work and then sell all dredging equipment.  They will then work with a  professional dredging contractor to clean out specified problem areas identified during the hydrographic survey process.  Understanding the true extent of the lake sediment distribution in the lake will save the POA an estimated $200,000 to $300,000 in costs by selling unnecessary equipment and strategic dredging planning.  The POA will be using the hydrographic survey information as a baseline for all future work and will adjust the map as dredging continues.

Conclusion:  In the end the primary problem facing the POA was not the sediment in the lake but rather not knowing the facts about the lake to make the best decisions.  The POA now has the facts needed to create a comprehensive plan that will accurately represent the work being completed.  Plus members have a wonderful contour map to assist with fishing!

The Mapping Network surveyed the bottom of the lake including the sediment depths. This map shows the lake water depth as blue contours lines as well as a color shaded sediment thickness. This specialized technology allows the POA to easily locate problem areas.

The Mapping Network surveyed the bottom of the lake including the sediment depths. This map shows the lake water depth as blue contours lines as well as a color shaded sediment thickness. This specialized technology allows the POA to easily locate problem areas.

The Mapping Network is an industry leader in Hydrographic Surveys, Bathymetry, Geographic Information Systems Consulting, Data Conversion, and GPS Data Collection.  We specialize in terrain and sub-surface (bathymetry) GPS mapping.   If you are serious about maintaining  a high-quality golf course, lake or pond, be sure you have the ability to make the best decisions,  get your resource mapped by the professionals at The Mapping Network.   Give us a call or send an e-mail to find out more details.

phone:  (402) 241-8177

e-mail: info@themappingnetwork.com

website: www.themappingnetwork.com

Check out The Mapping Network on Facebook for more examples and success stories!

The Mapping Network is proud to announce their firm has been chosen by Cabela’s, the World’s Foremost Outfitter, as a Landowner Services provider for Cabela’s Trophy Properties throughout the United States.  Visit us on the Cabela’s Trophy Properties website >> click here

The Mapping Network:  www.TheMappingNetwork.com

A Nationwide Network of GPS Mapping Professionals

Property Owner Association Uses Hydrographic & Sediment Surveys to Create Strategic Sediment Removal Plan

The Mapping Network Hydrographic Survey Team exceeds expectations for Property Owner Association.

Sediment problems are inevitable in all lakes and at some point removal is required.  Lake dredging and/or excavation can be an expensive process and requires accurate planning to be as cost-efficient as possible.   A lake Property Owners Association (POA) had been dealing directly with the challenges associated with sedimentation in their lake.  The POA decided they needed to quantify the sediment problem to create a sustainable sediment management plan.  The president of the board spearheaded an effort to get a hydrographic and sediment survey completed.  The president contacted several hydrographic survey companies and chose The Mapping Network to provide this service based on experience in the industry and listening to the needs of the POA.

Lake Survey Purpose:  The primary objective of the hydrographic and sediment survey was to better understand the condition of the lake by charting the existing lake contours along with mapping the sediment thickness throughout the lake.  Once the mapping process was completed the POA was able to identify areas that needed dredging and how much material was there.  This allows for much better budgeting and accountability.

Results:  The POA was excited to have information based on real numbers (lake and sediment survey).  The hydrographic survey results are an essential part of the decision making process with regards to the sediment removal planning.  Now they have real information, which gives them a clear picture of what to do in the future.

Action Plan:   The POA has hired a professional dredging contractor to clean out specified problem areas identified during the hydrographic survey process.  The POA will be using the hydrographic survey information as a baseline for all future work and will adjust the map as dredging wraps up.  In the end the primary problem facing the POA was not simply the sediment in the lake but rather not knowing the facts about the lake to make the best decisions.  The POA now has the facts needed to create a comprehensive plan that will accurately represent the work being completed.  Plus members have a wonderful contour map to assist with fishing!

The Mapping Network surveyed the bottom of the lake including the sediment depths. This map shows the lake water depth as blue contours lines as well as a color shaded sediment thickness. This specialized technology allows the POA to easily locate problem areas.

The Mapping Network surveyed the bottom of the lake including the sediment depths. This map shows the lake water depth as blue contours lines as well as a color shaded sediment thickness. This specialized technology allows the POA to easily locate problem areas.

The Mapping Network is an industry leader in Hydrographic Surveys, Bathymetry, Geographic Information Systems Consulting, Data Conversion, and GPS Data Collection.  We specialize in terrain and sub-surface (bathymetry) GPS mapping.   If you are serious about maintaining  a high-quality golf course, lake or pond, be sure you have the ability to make the best decisions,  get your resource mapped by the professionals at The Mapping Network.   Give us a call or send an e-mail to find out more details.

phone:  (402) 241-8177

e-mail: info@themappingnetwork.com

website: www.themappingnetwork.com

Check out The Mapping Network on Facebook for more examples and success stories!

The Mapping Network is proud to announce their firm has been chosen by Cabela’s, the World’s Foremost Outfitter, as a Landowner Services provider for Cabela’s Trophy Properties throughout the United States.  Visit us on the Cabela’s Trophy Properties website >> click here

The Mapping Network:  www.TheMappingNetwork.com

A Nationwide Network of GPS Mapping Professionals

Property Owner Association Uses Hydrographic & Sediment Surveys to Create Strategic Sediment Removal Plan

The Mapping Network Hydrographic Survey Team exceeds expectations for Property Owner Association.

Sediment problems are inevitable in all lakes and at some point removal is required.  Lake dredging and/or excavation can be an expensive process and requires accurate planning to be as cost-efficient as possible.   A lake Property Owners Association (POA) had been dealing directly with the challenges associated with sedimentation in their lake.  The POA decided they needed to quantify the sediment problem to create a sustainable sediment management plan.  The president of the board spearheaded an effort to get a hydrographic and sediment survey completed.  The president contacted several hydrographic survey companies and chose The Mapping Network to provide this service based on experience in the industry and listening to the needs of the POA.

Lake Survey Purpose:  The primary objective of the hydrographic and sediment survey was to better understand the condition of the lake by charting the existing lake contours along with mapping the sediment thickness throughout the lake.  Once the mapping process was completed the POA was able to identify areas that needed dredging and how much material was there.  This allows for much better budgeting and accountability.

Results:  The POA was excited to have information based on real numbers (lake and sediment survey).  The hydrographic survey results are an essential part of the decision making process with regards to the sediment removal planning.  Now they have real information, which gives them a clear picture of what to do in the future.

Action Plan:   The POA has hired a professional dredging contractor to clean out specified problem areas identified during the hydrographic survey process.  The POA will be using the hydrographic survey information as a baseline for all future work and will adjust the map as dredging wraps up.  In the end the primary problem facing the POA was not simply the sediment in the lake but rather not knowing the facts about the lake to make the best decisions.  The POA now has the facts needed to create a comprehensive plan that will accurately represent the work being completed.  Plus members have a wonderful contour map to assist with fishing!

The Mapping Network surveyed the bottom of the lake including the sediment depths. This map shows the lake water depth as blue contours lines as well as a color shaded sediment thickness. This specialized technology allows the POA to easily locate problem areas.

The Mapping Network surveyed the bottom of the lake including the sediment depths. This map shows the lake water depth as blue contours lines as well as a color shaded sediment thickness. This specialized technology allows the POA to easily locate problem areas.

The Mapping Network is an industry leader in Hydrographic Surveys, Bathymetry, Geographic Information Systems Consulting, Data Conversion, and GPS Data Collection.  We specialize in terrain and sub-surface (bathymetry) GPS mapping.   If you are serious about maintaining  a high-quality golf course, lake or pond, be sure you have the ability to make the best decisions,  get your resource mapped by the professionals at The Mapping Network.   Give us a call or send an e-mail to find out more details.

phone:  (402) 241-8177

e-mail: info@themappingnetwork.com

website: www.themappingnetwork.com

Check out The Mapping Network on Facebook for more examples and success stories!

The Mapping Network is proud to announce their firm has been chosen by Cabela’s, the World’s Foremost Outfitter, as a Landowner Services provider for Cabela’s Trophy Properties throughout the United States.  Visit us on the Cabela’s Trophy Properties website >> click here

The Mapping Network:  www.TheMappingNetwork.com

A Nationwide Network of GPS Mapping Professionals

The Mapping Network Adds Submerged Aquatic Vegetation (SAV) and Analysis

Technology allows for invasive vegetation monitoring, ecological evaluation and eradication status

FOR PRESS RELEASE CLICK HERE >> Aquatic Vegetation Survey

FOR DETAILED EXAMPLES CLICK HERE >> Hydrographic, Sediment Survey & Vegetation Mapping Information (opens as a pdf in your browser)

The Mapping Network is proud to announce the addition of an automated submerged aquatic vegetation (SAV) mapping and analysis.  Utilizing software developed by the U.S. Army Engineer Research and Development Center (ERDC-EL), The Mapping Network, and it’s nationwide network of lake management professionals, have the ability to process the distinct signature of submerged aquatic vegetation (SAV) within the recorded signal to determine depth, plant height, and coverage.

“The Mapping Network is excited to offer this unique service to clients throughout the country.  We really enjoy helping people make the most of their aquatic resources.” stated Steve Bartosh, President of The Mapping Network. With nationwide coverage, The Mapping Network can fulfill the demand for invasive vegetation monitoring, ecological evaluation and eradication status.

Visit our website for more Submerged Aquatic Vegetation Mapping examples >> CLICK MORE MORE INFO

Vegetation survey
showing a side profile view,
vegetation height scatter plot,
and transect line overview.

About The Mapping Network

The Mapping Network is based in Omaha, Nebraska is an industry leader in hydro-graphic surveys, bathymetry, sub-bottom profile surveys on lake and river systems, sediment mapping, submerged aquatic vegetation mapping, Geographic Information Systems (GIS) consulting, and GPS data collection.  This nationwide network of lake professionals  specialize in terrain and sub-surface (bathymetry) GPS mapping by accurately mapping bodies of water, calculating the water volume, collecting sediment depth samples at critical areas and monitoring the distribution of sediment over time.  The Mapping Network is comprised of a wide group of professionals specializing in all facets of lake management.   Give The Mapping Network a call or send an e-mail to find out more details.

Since 1999, the staff at The Mapping Network began linking hydro-acoustic depth measuring equipment with Differential and RTK GPS receivers to create accurate and up to date bathymetry maps. Over the ensuing years, this technology has improved and our company has remained on the cutting edge of utilizing these systems to produce very accurate and cost effective bathymetry and sediment surveys.The Mapping Network works directly with government organizations, lake associations, engineers, developers and dredging companies. Our company and personnel have been leaders in the development of tools and technology for hydrographic survey systems for over a decade.

Contact:

phone:  (402) 241-8177

e-mail: info@themappingnetwork.com

website: www.themappingnetwork.com

CLICK HERE >> Hydrographic and Sediment Survey Information (opens as a pdf in your browser)

Check out The Mapping Network on Facebook for more examples and success stories!

The Mapping Network is proud to announce their firm has been chosen by Cabela’s, the World’s Foremost Outfitter, as a Landowner Services provider for Cabela’s Trophy Properties throughout the United States.  Visit us on the Cabela’s Trophy Properties website >> click here

The Mapping Network:  www.TheMappingNetwork.com

A Nationwide Network of GPS Mapping Professionals

  • Hydrographic Surveying
  • Sediment Surveying
  • Sub-Bottom Profiling
  • Side Scanning Sonar Data Collection
  • Lake Bottom Hardness Analysis
  • Capacity Curve Analysis
  • Sediment Quantity Analysis
  • Invasive Vegetation Mapping
  • Land Mapping
  • Bio-Volume Vegetation Mapping
  • SonarWiz, Hypack and Dredgepack Data
  • Profile (Thalweg) Survey
  • GIS Processing and Analysis
  • USACOE and IHO Compliant