Marsh rainbow arch bridges in Iowa, 1997

The Marsh Rainbow Arch Bridge is a patented bridge design by James Barney Marsh, a graduate of Iowa State College of Agriculture and Mechanic Arts (now Iowa State University). Around the turn of the 20th Century, reinforced concrete was introduced in Iowa as an important new bridge construction material. Marsh used the new technology to encased steel truss arches in concrete to produce a sturdy yet esthetic arch bridge. This booklet touches on the important aspects of Marsh's life, business and industrial contributions.

Role of habitat in the distribution and abundance of marsh birds, 1965

This is Special Report no. 43 that studies habitat changes and the affects on marsh birds. It covers the history of vegetation and birds of two marshes, Little Wall and Goose Lake, in Iowa for a 5-year period beginning in 1958 at the culmination of a series of drought years in central Iowa.

Estimation of Water Circulation in a Mediterranean Salt Marsh and its Relationship with Flooding Causes

Variations in water volume in small depressions in Mediterranean salt marshes in Girona (Spain) are described and the potential causes for these variations analysed. Although the basins appear to be endorrheic, groundwater circulation is intense, as estimated from the difference between water volume observed and that expected from the balance precipitation / evaporation. The rate of variation in volume (VR = AV / VAt) may be used to estimate groundwater supply ('circulation'), since direct measurements of this parameter are impossible. Volume.conductivity figures can also be used to estimate the quantity of circulation, and to investigate the origin of water supplied to the system. The relationships between variations in the volume of water in the basins and the main causes of flooding are also analysed. Sea storms, rainfall levels and strong, dry northerly winds are suggested as the main causes of the variations in the volumes of basins. The relative importance assigned to these factors has changed, following the recent regulation of freshwater flows entering the system

Letter (unsigned) to R.A. Lucas suggesting that the mapping of the marsh be put off until after the next meeting

Letter (unsigned) to R.A. Lucas suggesting that the mapping of the marsh be put off until after the next meeting. The rest of the letter deals with licenses, Nov. 29, 1882.

Memo about the Point Pelee Marsh

Memo about the Point Pelee Marsh in which the writer [S.D. Woodruff] states that a considerable portion of this marsh is a Government Naval Reserve which the South Essex Gun Club has leased from the Dominion Government for a period of 21 years. The club is comprised of several men who have applied for and act of incorporation by the Long Point and Turkey Point Companies, n.d.

Memo regarding the drainage of marsh lands

Memo regarding the drainage of marsh lands (1 page, handwritten), Jan. 15, 1855.

Memorandum respecting the marsh drainage

Memorandum respecting the marsh drainage (2 ½ pages, handwritten), July 7, 1855.

Report by Jacob Misner on setting contracts for deepening and clearing ditches and estimates of quantities and costs of marsh drainage

Report by Jacob Misner on setting contracts for deepening and clearing ditches and estimates of quantities and costs of marsh drainage (3 ½ pages, handwritten). This is marked as a copy, July 14, 1855.

Plan of levels of marsh land on the line of the proposed ditch from Lyons Creek Culvert on the Welland Canal to lot no. 32 in the 2nd concession of Wainfleet

Plan of levels of marsh land on the line of the proposed ditch from Lyons Creek Culvert on the Welland Canal to lot no. 32 in the 2nd concession of Wainfleet (1 page, hand drawn), n.d.

Estimate of amount of excavation done by A. Cook on the ditch for marsh lands drainage

Estimate of amount of excavation done by A. Cook on the ditch for marsh lands drainage, Aug. 29, 1855.

Estimate of work done on marsh drainage by A. Cook, signed by S.D. Woodruff

Estimate of work done on marsh drainage by A. Cook, signed by S.D. Woodruff, Aug. 31, 1855.

Estimate of work done on marsh lands drainage by Alexander Cook, signed by S.D. Woodruff

Estimate of work done on marsh lands drainage by Alexander Cook, signed by S.D. Woodruff, Nov. 10, 1855.

Estimate of work done on marsh lands drainage by A. Cook and A. Mains and an estimate of time on the marsh lands survey from September to November

Estimate of work done on marsh lands drainage by A. Cook and A. Mains and an estimate of time on the marsh lands survey from September to November by Fred Holmes, Thomas Baird and Joseph Simpson. This is signed by S.D. Woodruff, Nov. 29, 1855.

Estimate of work done on marsh lands drainage by Alexander Cook and Andrew Mains

Estimate of work done on marsh lands drainage by Alexander Cook and Andrew Mains. This is signed by S.D. Woodruff. Also on this sheet is pay roll for engineer services for the months of September, October and November, 1855. This was paid to Frederick Holmes, Thomas Baird, Joseph Simpson and Len [illegible name], Nov.30, 1855.