Tag Archives: sediment survey

Tracking Lake Sediment in Virginia

Solitude Lake Management created a bathymetry and sediment volume study for a property owners association in Virginia. The pond was mapped to understand current water depths and to calculate the amount of accumulated sediment.  This timely analysis can facilitate future dredging and appropriate actions for maintaining a stable environment.

sedimentwillowmerepondblog

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!

Follow @MappingNetwork

Advertisements

Bathymetry and Sediment Survey of Lake in Peoria, Illinois

A property association in Peoria, Illinois needed to quantify sediment build-up in their coves.  The Mapping Network created a hydrographic and sediment survey of the two lakes and 20 coves.   The amount of sediment in each cove was calculated along with other vitals stats about the current lake condition.  A watershed map was also generated to help understand where sources of sediment are coming from.

Water depth of both lakes shown as contour lines and is also color-shaded.

Water depth of both lakes shown as contour lines and is also color-shaded.

The 1,680 acre watershed of the two lakes.

The 1,680 acre watershed of the two lakes.

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!

Hydrographic and Sediment Survey of Lake in Cleveland, Ohio

The Mapping Network created a hydrographic and sediment survey for a property owners association in Cleveland, Ohio.   The main lake inlet has shallow water because sediment settles out at the mouth of the stream, creating deltas. These deltas impede fish migration, act as bedding areas for nuisance aquatic species, hinder recreational activities such as swimming and boating, and force property owners to extend their docks.

The POA installed two sediment basins to capture sediment coming from the north but as you can see from the watershed map, much more sediment is arriving from the east (this includes residential areas and a golf course).   The Mapping Network sampled the sediment structure and mapped the sludge thickness to help the client in the dredging bid process.  Part of the report included understanding sources of sediment and how activity within the watershed will ultimately affect the lake.   Below are maps showing the current water depth, sediment thickness, and total watershed.

Contour map of water depths for main lake and two ponds

Contour map of water depths for main lake and two ponds

Sediment depth for main lake and two adjacent ponds.

Sediment depth for main lake and two adjacent ponds.

Watershed with shaded elevations.

Watershed with shaded elevations.

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!

Hydrographic and Sediment Survey of Lake in Kansas City, MO

The Mapping Network created a hydrographic and sediment survey for a property owners association in a suburb of Kansas City, Missouri.  The client was experiencing an increase in sediment on the main inflow and also 7 other coves.  Residents were having difficulties accessing the main body of the lake from their docks due to shallow water.  The POA needed to know how much sediment had accumulated in each cove to budget for removal in the near future.  As a result of the lake survey the POA not only has an understanding of the amount of sediment in the coves, but they also have an accurate map of the entire lake.  This map will be used by the property owners as a fishing map and as a baseline for future monitoring of sedimentation.

Water depths created from bathymetric survey

Water depths created from bathymetric survey

Amount of soft sediment in the lake based on measurements collected on-site

Amount of soft sediment in the lake based on measurements collected on-site

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!

Lake Bathymetry Study of Pond in St. Louis, Missouri

The Mapping Network and Leisure Ponds teamed up to create a bathymetric study for a pond on a commercial property in St. Louis, Missouri.   Up-to-date water depths and volume are required for treatment applications, fisheries management and monitoring sedimentation rates.   Jim Darlington, owner of Leisure Ponds also generated a report on the health of the pond to ensure proper management and continued enjoyment for employees.

One foot Contour lines showing depth of the pond.  Inflow and Outflow are noted.

One foot Contour lines showing depth of the pond. Inflow and Outflow are noted.

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.  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!

Hydrographic Survey of Lake in St. Louis, Missouri

The Mapping Network and Leisure Ponds teamed up to create a hydrographic and sediment survey for a property owners association in a suburb of St. Louis, Missouri.  The client was experiencing an increase in sediment on the main inflow and also 2 other coves.  Residents were having difficulties accessing the main body of the lake from their docks due to shallow water.  The POA needed to know how much sediment had accumulated in each cove to budget for removal in the near future.  As a result of the lake survey the POA not only has an understanding of the amount of sediment in the coves, but they also have an accurate map of the entire lake.  This map will be used by the property owners as a fishing map and as a baseline for future monitoring of sedimentation.  Jim Darlington, owner of Leisure Ponds also generated a report on the health of the lake to ensure proper management and continued enjoyment for residents.

vey

Detailed contour map as a result of the hydrographic survey

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!